New: Picture effects screen, resizes / mirrors / rotates image (Issue 73)

New: Distort brush (Issue 34)
New: Pixel scaler "Triple" for 3x3 zoom (Issue 147)
New: Pixel scaler "Quadruple" for 4x4 zoom (Issue 151)
New: Pixel scaler "Wide2" for 4x2 zoom (Issue 148)
New: Pixel scaler "Tall2" for 2x4 zoom (Issue 149)
Fix of very old bug: Resizing the image didn't mark the image 'modified since last save'

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@763 416bcca6-2ee7-4201-b75f-2eb2f807beb1

Makefile

@@ -236,7 +236,7 @@ endif
 .PHONY : all debug release clean depend zip version force install uninstall
 
 # This is the list of the objects we want to build. Dependancies are built by "make depend" automatically.
-OBJ = $(OBJDIR)/main.o $(OBJDIR)/init.o $(OBJDIR)/graph.o $(OBJDIR)/sdlscreen.o  $(OBJDIR)/misc.o $(OBJDIR)/special.o $(OBJDIR)/buttons.o $(OBJDIR)/palette.o $(OBJDIR)/help.o $(OBJDIR)/operatio.o $(OBJDIR)/pages.o $(OBJDIR)/loadsave.o $(OBJDIR)/readline.o $(OBJDIR)/engine.o $(OBJDIR)/filesel.o $(OBJDIR)/op_c.o $(OBJDIR)/readini.o $(OBJDIR)/saveini.o $(OBJDIR)/shade.o $(OBJDIR)/keyboard.o $(OBJDIR)/io.o $(OBJDIR)/version.o $(OBJDIR)/text.o $(OBJDIR)/SFont.o $(OBJDIR)/setup.o $(OBJDIR)/pxsimple.o $(OBJDIR)/pxtall.o $(OBJDIR)/pxwide.o $(OBJDIR)/pxdouble.o $(OBJDIR)/windows.o $(OBJDIR)/brush.o $(OBJDIR)/realpath.o $(OBJDIR)/mountlist.o $(OBJDIR)/input.o $(OBJDIR)/hotkeys.o
+OBJ = $(OBJDIR)/main.o $(OBJDIR)/init.o $(OBJDIR)/graph.o $(OBJDIR)/sdlscreen.o  $(OBJDIR)/misc.o $(OBJDIR)/special.o $(OBJDIR)/buttons.o $(OBJDIR)/palette.o $(OBJDIR)/help.o $(OBJDIR)/operatio.o $(OBJDIR)/pages.o $(OBJDIR)/loadsave.o $(OBJDIR)/readline.o $(OBJDIR)/engine.o $(OBJDIR)/filesel.o $(OBJDIR)/op_c.o $(OBJDIR)/readini.o $(OBJDIR)/saveini.o $(OBJDIR)/shade.o $(OBJDIR)/keyboard.o $(OBJDIR)/io.o $(OBJDIR)/version.o $(OBJDIR)/text.o $(OBJDIR)/SFont.o $(OBJDIR)/setup.o $(OBJDIR)/pxsimple.o $(OBJDIR)/pxtall.o $(OBJDIR)/pxwide.o $(OBJDIR)/pxdouble.o $(OBJDIR)/pxtriple.o $(OBJDIR)/pxtall2.o $(OBJDIR)/pxwide2.o $(OBJDIR)/pxquad.o $(OBJDIR)/windows.o $(OBJDIR)/brush.o $(OBJDIR)/realpath.o $(OBJDIR)/mountlist.o $(OBJDIR)/input.o $(OBJDIR)/hotkeys.o $(OBJDIR)/transform.o
 
 all : $(BIN)
 

Makefile.dep

@@ -1,6 +1,6 @@
 $(OBJDIR)/SFont.o: SFont.c SFont.h
 $(OBJDIR)/brush.o: brush.c global.h struct.h const.h graph.h misc.h errors.h \
-  windows.h sdlscreen.h
+  windows.h sdlscreen.h brush.h
 $(OBJDIR)/buttons.o: buttons.c const.h struct.h global.h misc.h graph.h engine.h \
   readline.h filesel.h loadsave.h init.h buttons.h operatio.h pages.h \
   errors.h readini.h saveini.h shade.h io.h help.h text.h sdlscreen.h \
@@ -10,21 +10,21 @@ $(OBJDIR)/engine.o: engine.c const.h struct.h global.h graph.h misc.h special.h
   input.h engine.h
 $(OBJDIR)/filesel.o: filesel.c const.h struct.h global.h misc.h errors.h io.h \
   windows.h sdlscreen.h loadsave.h mountlist.h engine.h readline.h \
-  input.h help.h
+  input.h help.h filesel.h
 $(OBJDIR)/graph.o: graph.c global.h struct.h const.h engine.h buttons.h pages.h \
   errors.h sdlscreen.h graph.h misc.h pxsimple.h pxtall.h pxwide.h \
-  pxdouble.h windows.h
+  pxdouble.h pxtriple.h pxwide2.h pxtall2.h pxquad.h windows.h
 $(OBJDIR)/help.o: help.c const.h struct.h global.h misc.h engine.h helpfile.h \
   help.h sdlscreen.h text.h keyboard.h windows.h input.h hotkeys.h \
   errors.h
 $(OBJDIR)/hotkeys.o: hotkeys.c struct.h const.h global.h hotkeys.h
 $(OBJDIR)/init.o: init.c const.h struct.h global.h graph.h buttons.h palette.h \
   help.h operatio.h misc.h errors.h keyboard.h io.h hotkeys.h setup.h \
-  windows.h sdlscreen.h mountlist.h loadsave.h
+  windows.h sdlscreen.h mountlist.h loadsave.h init.h transform.h
 $(OBJDIR)/input.o: input.c global.h struct.h const.h keyboard.h sdlscreen.h \
   windows.h errors.h misc.h input.h
 $(OBJDIR)/io.o: io.c struct.h const.h io.h realpath.h
-$(OBJDIR)/keyboard.o: keyboard.c global.h struct.h const.h
+$(OBJDIR)/keyboard.o: keyboard.c global.h struct.h const.h keyboard.h
 $(OBJDIR)/loadsave.o: loadsave.c buttons.h struct.h const.h errors.h global.h io.h \
   loadsave.h misc.h op_c.h pages.h palette.h sdlscreen.h windows.h
 $(OBJDIR)/main.o: main.c const.h struct.h global.h graph.h misc.h init.h buttons.h \
@@ -39,27 +39,40 @@ $(OBJDIR)/operatio.o: operatio.c const.h struct.h global.h misc.h engine.h graph
 $(OBJDIR)/pages.o: pages.c global.h struct.h const.h pages.h errors.h misc.h \
   windows.h
 $(OBJDIR)/palette.o: palette.c const.h struct.h global.h misc.h engine.h readline.h \
-  buttons.h pages.h help.h sdlscreen.h errors.h op_c.h windows.h input.h
+  buttons.h pages.h help.h sdlscreen.h errors.h op_c.h windows.h input.h \
+  palette.h
 $(OBJDIR)/pxdouble.o: pxdouble.c global.h struct.h const.h sdlscreen.h misc.h \
-  pxwide.h
+  pxdouble.h pxwide.h
-$(OBJDIR)/pxsimple.o: pxsimple.c global.h struct.h const.h sdlscreen.h misc.h
+$(OBJDIR)/pxquad.o: pxquad.c global.h struct.h const.h sdlscreen.h misc.h pxquad.h
-$(OBJDIR)/pxtall.o: pxtall.c global.h struct.h const.h sdlscreen.h misc.h \
+$(OBJDIR)/pxsimple.o: pxsimple.c global.h struct.h const.h sdlscreen.h misc.h \
   pxsimple.h
-$(OBJDIR)/pxwide.o: pxwide.c global.h struct.h const.h sdlscreen.h misc.h
+$(OBJDIR)/pxtall.o: pxtall.c global.h struct.h const.h sdlscreen.h misc.h pxtall.h \
-$(OBJDIR)/readini.o: readini.c const.h global.h struct.h misc.h
+  pxsimple.h
+$(OBJDIR)/pxtall2.o: pxtall2.c global.h struct.h const.h sdlscreen.h misc.h \
+  pxtall2.h
+$(OBJDIR)/pxtriple.o: pxtriple.c global.h struct.h const.h sdlscreen.h misc.h \
+  pxtriple.h
+$(OBJDIR)/pxwide.o: pxwide.c global.h struct.h const.h sdlscreen.h misc.h pxwide.h
+$(OBJDIR)/pxwide2.o: pxwide2.c global.h struct.h const.h sdlscreen.h misc.h \
+  pxwide2.h
+$(OBJDIR)/readini.o: readini.c const.h global.h struct.h misc.h readini.h
 $(OBJDIR)/readline.o: readline.c const.h struct.h global.h misc.h errors.h \
   sdlscreen.h readline.h windows.h input.h
 $(OBJDIR)/realpath.o: realpath.c
 $(OBJDIR)/saveini.o: saveini.c const.h global.h struct.h readini.h io.h errors.h \
-  misc.h
+  misc.h saveini.h
 $(OBJDIR)/sdlscreen.o: sdlscreen.c global.h struct.h const.h sdlscreen.h errors.h \
   misc.h
-$(OBJDIR)/setup.o: setup.c struct.h const.h io.h
+$(OBJDIR)/setup.o: setup.c struct.h const.h io.h setup.h
 $(OBJDIR)/shade.o: shade.c global.h struct.h const.h graph.h engine.h misc.h \
-  readline.h help.h sdlscreen.h windows.h input.h
+  readline.h help.h sdlscreen.h windows.h input.h shade.h
-$(OBJDIR)/special.o: special.c const.h struct.h global.h graph.h engine.h windows.h
+$(OBJDIR)/special.o: special.c const.h struct.h global.h graph.h engine.h windows.h \
+  special.h
 $(OBJDIR)/text.o: text.c SFont.h struct.h const.h global.h sdlscreen.h io.h \
   errors.h
+$(OBJDIR)/transform.o: transform.c global.h struct.h const.h transform.h engine.h \
+  sdlscreen.h windows.h input.h help.h misc.h readline.h buttons.h \
+  pages.h
 $(OBJDIR)/version.o: version.c
 $(OBJDIR)/windows.o: windows.c windows.h struct.h const.h global.h graph.h engine.h \
   misc.h sdlscreen.h errors.h

brush.c

@@ -718,7 +718,7 @@ void Rotate_90_deg()
   new_brush=(byte *)malloc(((long)Brush_height)*Brush_width);
   if (new_brush)
   {
-    Rotate_90_deg_lowlevel(Brush,new_brush);
+    Rotate_90_deg_lowlevel(Brush,new_brush,Brush_width,Brush_height);
     free(Brush);
     Brush=new_brush;
 
@@ -1149,75 +1149,32 @@ void Capture_brush_with_lasso(int vertices, short * points,short clear)
 
 void Stretch_brush(short x1, short y1, short x2, short y2)
 {
-  int    offset,line,column;
   byte * new_brush;
-
   int    new_brush_width;  // Width de la nouvelle brosse
   int    new_brush_height;  // Height de la nouvelle brosse
+  int    x_flipped, y_flipped;
   
-  int    x_pos_in_brush;   // Position courante dans l'ancienne brosse
+  // Compute new brush dimensions
-  int    y_pos_in_brush;
-  int    delta_x_in_brush; // "Vecteur incrémental" du point précédent
-  int    delta_y_in_brush;
-  int    initial_x_pos;       // Position X de début de parcours de ligne
-  int    dx,dy;
-
-  dx=(x1<x2)?1:-1;
-  dy=(y1<y2)?1:-1;
-
-  // Calcul des nouvelles dimensions de la brosse:
   if ((new_brush_width=x1-x2)<0)
+  {
+    x_flipped=1;
     new_brush_width=-new_brush_width;
+  }
   new_brush_width++;
 
   if ((new_brush_height=y1-y2)<0)
+  {
+    y_flipped=1;
     new_brush_height=-new_brush_height;
+  }
   new_brush_height++;
 
-  // Calcul des anciennes dimensions de la brosse:
+  // Free some memory
-
+  free(Smear_brush);
-  // Calcul du "vecteur incrémental":
-  delta_x_in_brush=(Brush_width<<16)/(x2-x1+dx);
-  delta_y_in_brush=(Brush_height<<16)/(y2-y1+dy);
-
-  // Calcul de la valeur initiale de x_pos pour chaque ligne:
-  if (dx>=0)
-    initial_x_pos = 0;                // Pas d'inversion en X de la brosse
-  else
-    initial_x_pos = (Brush_width<<16)-1; // Inversion en X de la brosse
-
-  free(Smear_brush); // On libère un peu de mémoire
 
   if ((new_brush=((byte *)malloc(new_brush_width*new_brush_height))))
   {
-    offset=0;
+    Rescale(Brush, Brush_width, Brush_height, new_brush, new_brush_width, new_brush_height, x2<x1, y2<y1);
-
-    // Calcul de la valeur initiale de y_pos:
-    if (dy>=0)
-      y_pos_in_brush=0;                // Pas d'inversion en Y de la brosse
-    else
-      y_pos_in_brush=(Brush_height<<16)-1; // Inversion en Y de la brosse
-
-    // Pour chaque ligne
-    for (line=0;line<new_brush_height;line++)
-    {
-      // On repart du début de la ligne:
-      x_pos_in_brush=initial_x_pos;
-
-      // Pour chaque colonne:
-      for (column=0;column<new_brush_width;column++)
-      {
-        // On copie le pixel:
-        new_brush[offset]=Read_pixel_from_brush(x_pos_in_brush>>16,y_pos_in_brush>>16);
-        // On passe à la colonne de brosse suivante:
-        x_pos_in_brush+=delta_x_in_brush;
-        // On passe au pixel suivant de la nouvelle brosse:
-        offset++;
-      }
-
-      // On passe à la ligne de brosse suivante:
-      y_pos_in_brush+=delta_y_in_brush;
-    }
 
     free(Brush);
     Brush=new_brush;
@@ -1248,7 +1205,7 @@ void Stretch_brush(short x1, short y1, short x2, short y2)
   }
   else
   {
-    // Ici la libération de mémoire n'a pas suffit donc on remet dans l'état
+    // Ici la libération de mémoire n'a pas suffi donc on remet dans l'état
     // où c'etait avant. On a juste à réallouer la Smear_brush car il y a
     // normalement la place pour elle puisque rien d'autre n'a pu être alloué
     // entre temps.
@@ -1335,7 +1292,221 @@ void Stretch_brush_preview(short x1, short y1, short x2, short y2)
   Update_part_of_screen(initial_dest_x_pos,initial_dest_y_pos,dest_width,dest_height);
 }
 
+/// Returns the minimum of 4 integers.
+inline int Min4(int a,int b,int c,int d)
+{
+  if (a<b)
+    if (c<d)
+      return a<c?a:c;
+    else
+      return a<d?a:d;
+  else
+    if (c<d)
+      return b<c?b:c;
+    else
+      return b<d?b:d;
+}
 
+//-------------------- Brush distort -------------------------------
+
+// That's a lot of globals, but it saves stack space in the recursive calls.
+static Func_pixel Pixel_for_distort;
+static byte *     Distort_buffer;
+static short      Distort_buffer_width;
+
+/// Draw a pixel in the target buffer. No clipping.
+void Pixel_in_distort_buffer(word x_pos,word y_pos,byte color)
+{
+  *(Distort_buffer+y_pos*Distort_buffer_width+x_pos)=color;
+}
+
+/// Returns the maximum of 4 integers.
+inline int Max4(int a,int b,int c,int d)
+{
+  if (a>b)
+    if (c>d)
+      return a>c?a:c;
+    else
+      return a>d?a:d;
+  else
+    if (c>d)
+      return b>c?b:c;
+    else
+      return b>d?b:d;
+}
+
+// Recursive function for linear distortion.
+void Draw_brush_linear_distort(long int tex_min_x,
+                               long int tex_min_y,
+                               long int tex_max_x,
+                               long int tex_max_y,
+                               long int x1,
+                               long int y1,
+                               long int x2,
+                               long int y2,
+                               long int x3,
+                               long int y3,
+                               long int x4,
+                               long int y4)
+{
+  static byte color;
+  // bounding rectangle
+  static long int min_x, max_x, min_y, max_y;
+  
+  min_x=Min4(x1,x2,x3,x4);
+  max_x=Max4(x1,x2,x3,x4);
+  min_y=Min4(y1,y2,y3,y4);
+  max_y=Max4(y1,y2,y3,y4);
+   
+  if ((max_x>>16) - (min_x>>16) <= 1 && (max_y>>16) - (min_y>>16) <= 1)
+  //if (max_x - min_x <= 1<<16 && max_y - min_y <= 1<<16)
+  {
+    if ((min_x<(max_x&0x7FFF0000)) && (min_y<(max_y&0x7FFF0000)))  
+    {
+      color=Read_pixel_from_brush((tex_min_x)>>16,(tex_min_y)>>16);
+      if (color!=Back_color)
+        Pixel_for_distort(min_x>>16,min_y>>16,color);
+    }
+    return;
+  }
+  // Cut in 4 quarters and repeat
+  // "top left"
+  Draw_brush_linear_distort(tex_min_x,
+                            tex_min_y,
+                            (tex_min_x+tex_max_x)>>1,
+                            (tex_min_y+tex_max_y)>>1,
+                            x1,
+                            y1,
+                            (x1+x2)>>1,
+                            (y1+y2)>>1,
+                            (x1+x2+x3+x4)>>2,
+                            (y1+y2+y3+y4)>>2,
+                            (x1+x4)>>1,
+                            (y1+y4)>>1);
+
+  // "top right"
+  Draw_brush_linear_distort((tex_min_x+tex_max_x)>>1,
+                            tex_min_y,
+                            tex_max_x,
+                            (tex_min_y+tex_max_y)>>1,
+                            (x1+x2)>>1,
+                            (y1+y2)>>1,
+                            x2,
+                            y2,
+                            (x2+x3)>>1,
+                            (y2+y3)>>1,
+                            (x1+x2+x3+x4)>>2,
+                            (y1+y2+y3+y4)>>2);
+
+  // "bottom right"
+  Draw_brush_linear_distort((tex_min_x+tex_max_x)>>1,
+                            (tex_min_y+tex_max_y)>>1,
+                            tex_max_x,
+                            tex_max_y,
+                            (x1+x2+x3+x4)>>2,
+                            (y1+y2+y3+y4)>>2,
+                            (x2+x3)>>1,
+                            (y2+y3)>>1,
+                            x3,
+                            y3,
+                            (x3+x4)>>1,
+                            (y3+y4)>>1);
+  
+  // "bottom left"
+  Draw_brush_linear_distort(tex_min_x,
+                            (tex_min_y+tex_max_y)>>1,
+                            (tex_min_x+tex_max_x)>>1,
+                            tex_max_y,
+                            (x1+x4)>>1,
+                            (y1+y4)>>1,
+                            (x1+x2+x3+x4)>>2,
+                            (y1+y2+y3+y4)>>2,
+                            (x3+x4)>>1,
+                            (y3+y4)>>1,
+                            x4,
+                            y4);
+
+  return;
+}
+
+/// Draws a distorted version of the brush, mapped over the given quad (picture coordinates).
+void Distort_brush_preview(short x1, short y1, short x2, short y2, short x3, short y3, short x4, short y4)
+{
+  Pixel_for_distort=Pixel_figure_preview;
+  Draw_brush_linear_distort(0, 0, (Brush_width<<16), (Brush_height<<16), (x1<<16), (y1<<16), (x2<<16), (y2<<16), (x3<<16), (y3<<16), (x4<<16), (y4<<16));
+}
+
+/// Modifies the current brush, mapping it over the given quad.
+void Distort_brush(short x1, short y1, short x2, short y2, short x3, short y3, short x4, short y4)
+{
+  short min_x, max_x, min_y, max_y;
+  short width, height;
+  byte * new_brush;
+  byte * new_smear_brush;
+  short new_smear_brush_width;
+  short new_smear_brush_height;
+  
+  // Move all coordinates to start on (0,0)
+  min_x=Min4(x1,x2,x3,x4);
+  max_x=Max4(x1,x2,x3,x4);
+  min_y=Min4(y1,y2,y3,y4);
+  max_y=Max4(y1,y2,y3,y4);
+
+  x1-=min_x;
+  x2-=min_x;
+  x3-=min_x;
+  x4-=min_x;
+
+  y1-=min_y;
+  y2-=min_y;
+  y3-=min_y;
+  y4-=min_y;
+  
+  width=Max(max_x-min_x, 1);
+  height=Max(max_y-min_y, 1);
+    
+  new_smear_brush_width=(width>MAX_PAINTBRUSH_SIZE)?width:MAX_PAINTBRUSH_SIZE;
+  new_smear_brush_height=(height>MAX_PAINTBRUSH_SIZE)?height:MAX_PAINTBRUSH_SIZE;
+
+  new_smear_brush=(byte *)malloc(((long)new_smear_brush_height)*new_smear_brush_width);
+  if (! new_smear_brush)
+  {
+    // Out of memory while allocating new smear brush
+    Error(0);
+    return;
+  }
+  
+  new_brush=((byte *)malloc((long)width*height));
+  if (!new_brush)
+  {
+    // Out of memory while allocating new brush
+    Error(0);
+    free(new_smear_brush);
+    return;
+  }
+
+  // Fill the new brush with backcolor, originally.
+  memset(new_brush,Back_color,((long)width)*height);
+  
+  // Call distort routine
+  Pixel_for_distort=Pixel_in_distort_buffer;
+  Distort_buffer=new_brush;
+  Distort_buffer_width=width;
+  Draw_brush_linear_distort(0, 0, (Brush_width<<16), (Brush_height<<16), (x1<<16), (y1<<16), (x2<<16), (y2<<16), (x3<<16), (y3<<16), (x4<<16), (y4<<16));
+
+  // Free old brushes
+  free(Smear_brush);
+  free(Brush);
+
+  // Point to the new ones
+  Brush=new_brush;
+  Brush_width=width;
+  Brush_height=height;
+
+  Smear_brush=new_smear_brush;
+  Smear_brush_width=new_smear_brush_width;
+  Smear_brush_height=new_smear_brush_height;
+}
 
 //------------------------- Rotation de la brosse ---------------------------
 

brush.h

@@ -68,6 +68,18 @@ void Rotate_brush_preview(float angle);
     Remap the brush palette to the nearest color in the picture one.
     Used when switching to the spare page.
 */
+
+/*!
+    Distort the brush on the screen.
+*/
+void Distort_brush_preview(short x1, short y1, short x2, short y2, short x3, short y3, short x4, short y4);
+
+/*!
+    Replace the brush by a distorted version of itself.
+*/
+void Distort_brush(short x1, short y1, short x2, short y2, short x3, short y3, short x4, short y4);
+
+
 void Remap_brush(void);
 
 /*!

buttons.c

@@ -1367,11 +1367,15 @@ void Button_Resolution(void)
   char  str[5];
   T_Special_button * input_width_button, * input_button_height;
   T_Dropdown_button * pixel_button;
-  static const char *pixel_ratio_labels[] ={
+  static const char *pixel_ratio_labels[PIXEL_MAX] ={
-    "Normal (1x1)",
+    "Normal    (1x1)",
-    "Wide   (2x1)",
+    "Wide      (2x1)",
-    "Tall   (1x2)",
+    "Tall      (1x2)",
-    "Double (2x2)"};
+    "Double    (2x2)",
+    "Triple    (3x3)",
+    "Wide2     (4x2)",
+    "Tall2     (2x4)",
+    "Quadruple (4x4)"};
 
   Open_window(299,190,"Picture & screen sizes");
 
@@ -1423,11 +1427,9 @@ void Button_Resolution(void)
 
   chosen_pixel=Pixel_ratio;
   Print_in_window( 12, 57,"Pixel size:"    ,MC_Dark,MC_Light);
-  pixel_button=Window_set_dropdown_button(108,55,14*8,11,14*8,pixel_ratio_labels[Pixel_ratio],1,0,1,LEFT_SIDE|RIGHT_SIDE);    // 7
+  pixel_button=Window_set_dropdown_button(108,55,17*8,11,17*8,pixel_ratio_labels[Pixel_ratio],1,0,1,LEFT_SIDE|RIGHT_SIDE);    // 7
-  Window_dropdown_add_item(pixel_button,PIXEL_SIMPLE,pixel_ratio_labels[PIXEL_SIMPLE]);
+  for (temp=0;temp<PIXEL_MAX;temp++)
-  Window_dropdown_add_item(pixel_button,PIXEL_WIDE,pixel_ratio_labels[PIXEL_WIDE]);
+    Window_dropdown_add_item(pixel_button,temp,pixel_ratio_labels[temp]);
-  Window_dropdown_add_item(pixel_button,PIXEL_TALL,pixel_ratio_labels[PIXEL_TALL]);
-  Window_dropdown_add_item(pixel_button,PIXEL_DOUBLE,pixel_ratio_labels[PIXEL_DOUBLE]);
 
   // 10 little buttons for the state of each visible mode
   for (temp=0; temp<MODELIST_LINES && temp < Nb_video_modes; temp++)
@@ -3368,22 +3370,17 @@ void Button_Brush_FX(void)
   switch (clicked_button)
   {
     case  2 : // Flip X
-      Flip_X_lowlevel();
+      Flip_X_lowlevel(Brush, Brush_width, Brush_height);
       break;
     case  3 : // Flip Y
-      Flip_Y_lowlevel();
+      Flip_Y_lowlevel(Brush, Brush_width, Brush_height);
       break;
     case  4 : // 90° Rotation
       Rotate_90_deg();
       break;
     case  5 : // 180° Rotation
       if (Brush_height&1)
-      { // Brush de hauteur impaire
+      Rotate_180_deg_lowlevel(Brush, Brush_width, Brush_height);
-        Flip_X_lowlevel();
-        Flip_Y_lowlevel();
-      }
-      else
-        Rotate_180_deg_lowlevel();
       Brush_offset_X=(Brush_width>>1);
       Brush_offset_Y=(Brush_height>>1);
       break;
@@ -3394,9 +3391,7 @@ void Button_Brush_FX(void)
       Start_operation_stack(OPERATION_STRETCH_BRUSH);
       break;
     case  8 : // Distort
-      Display_cursor();
+      Start_operation_stack(OPERATION_DISTORT_BRUSH);
-      Message_not_implemented(); // !!! TEMPORAIRE !!!
-      Hide_cursor();
       break;
     case  9 : // Recolorize
       Remap_brush();

const.h

@@ -153,6 +153,10 @@ enum PIXEL_RATIO
     PIXEL_WIDE,
     PIXEL_TALL,
     PIXEL_DOUBLE,
+    PIXEL_TRIPLE,
+    PIXEL_WIDE2,
+    PIXEL_TALL2,
+    PIXEL_QUAD,
     PIXEL_MAX ///< Number of elements in enum
 };
 

engine.c

@@ -106,7 +106,7 @@ void Restore_effects(void)
 char * Menu_tooltip[NB_BUTTONS]=
 {
   "Paintbrush choice       ",
-  "Adjust picture / Effects",
+  "Adjust / Transform menu ",
   "Freehand draw. / Toggle ",
   "Splines / Toggle        ",
   "Lines / Toggle          ",
@@ -407,6 +407,10 @@ void Unselect_button(int btn_number,byte click)
           && (!(Main_magnifier_mode && (b==BUTTON_MAGNIFIER))) )
           // Alors on désenclenche le bouton
           Unselect_bouton(b);
+      // Right-clicking on Adjust opens a menu, so in this case we skip
+      // the unselection of all "Tool" buttons.
+      if (btn_number==BUTTON_ADJUST && click==RIGHT_SIDE)
+        break;
       // Pour chaque bouton:
       for (b=0; b<NB_BUTTONS; b++)
         // S'il est de la męme famille
@@ -698,13 +702,13 @@ void Main_handler(void)
           break;
         case SPECIAL_FLIP_X : // Flip X
           Hide_cursor();
-          Flip_X_lowlevel();
+          Flip_X_lowlevel(Brush, Brush_width, Brush_height);
           Display_cursor();
           Key=0;
           break;
         case SPECIAL_FLIP_Y : // Flip Y
           Hide_cursor();
-          Flip_Y_lowlevel();
+          Flip_Y_lowlevel(Brush, Brush_width, Brush_height);
           Display_cursor();
           Key=0;
           break;
@@ -716,14 +720,7 @@ void Main_handler(void)
           break;
         case SPECIAL_ROTATE_180 : // 180° brush rotation
           Hide_cursor();
-          if (Brush_height&1)
+          Rotate_180_deg_lowlevel(Brush, Brush_width, Brush_height);
-          {
-            // Brush de hauteur impaire
-            Flip_X_lowlevel();
-            Flip_Y_lowlevel();
-          }
-          else
-            Rotate_180_deg_lowlevel();
           Brush_offset_X=(Brush_width>>1);
           Brush_offset_Y=(Brush_height>>1);
           Display_cursor();
@@ -736,7 +733,9 @@ void Main_handler(void)
           Key=0;
           break;
         case SPECIAL_DISTORT : // Distort brush
-          Message_not_implemented(); // !!! TEMPORAIRE !!!
+          Hide_cursor();
+          Start_operation_stack(OPERATION_DISTORT_BRUSH);
+          Display_cursor();
           Key=0;
           break;
         case SPECIAL_ROTATE_ANY_ANGLE : // Rotate brush by any angle

filesel.c

@@ -1040,7 +1040,7 @@ byte Button_Load_or_Save(byte load, byte image)
   {
     bookmark_dropdown[temp]=
       Window_set_dropdown_button(127+(88+1)*(temp%2),18+(temp/2)*12,88,11,56,"",0,0,1,RIGHT_SIDE); // 10-13
-    Window_display_icon_sprite(bookmark_dropdown[temp]->Pos_X+3,bookmark_dropdown[temp]->Pos_Y+2,5);
+    Window_display_icon_sprite(bookmark_dropdown[temp]->Pos_X+3,bookmark_dropdown[temp]->Pos_Y+2,ICON_STAR);
     Display_bookmark(bookmark_dropdown[temp],temp);
   }
   // On prend bien soin de passer dans le répertoire courant (le bon qui faut! Oui madame!)

graph.c

@@ -42,8 +42,15 @@
 #include "pxtall.h"
 #include "pxwide.h"
 #include "pxdouble.h"
+#include "pxtriple.h"
+#include "pxwide2.h"
+#include "pxtall2.h"
+#include "pxquad.h"
 #include "windows.h"
 
+// Generic pixel-drawing function.
+Func_pixel Pixel_figure;
+
 // Fonction qui met à jour la zone de l'image donnée en paramètre sur l'écran.
 // Tient compte du décalage X et Y et du zoom, et fait tous les controles nécessaires
 void Update_part_of_screen(short x, short y, short width, short height)
@@ -177,7 +184,6 @@ void Transform_point(short x, short y, float cos_a, float sin_a,
 }
 
 
-
 //--------------------- Initialisation d'un mode vidéo -----------------------
 
 int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
@@ -213,6 +219,22 @@ int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
           pix_width=2;
           pix_height=2;
       break;
+      case PIXEL_TRIPLE:
+          pix_width=3;
+          pix_height=3;
+      break;
+      case PIXEL_WIDE2:
+          pix_width=4;
+          pix_height=2;
+      break;
+      case PIXEL_TALL2:
+          pix_width=2;
+          pix_height=4;
+      break;
+      case PIXEL_QUAD:
+          pix_width=4;
+          pix_height=4;
+      break;
   }
 
   screen_changed = (Screen_width*Pixel_width!=width ||
@@ -246,7 +268,7 @@ int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
       // On AmigaOS the systems adds some more constraints on that ...
       width = (width + 15) & 0xFFFFFFF0;
   #else
-      width = (width + 3 ) & 0xFFFFFFFC;
+      //width = (width + 3 ) & 0xFFFFFFFC;
   #endif  
 
   pixels_changed = (Pixel_ratio!=pix_ratio);
@@ -257,6 +279,7 @@ int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
   {
     Set_mode_SDL(&width, &height,fullscreen);
   }
+  Clear_border(MC_Black);
   if (screen_changed || pixels_changed)
   {
     Pixel_ratio=pix_ratio;
@@ -353,6 +376,94 @@ int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
             Clear_brush_scaled = Clear_brush_scaled_double ;
             Display_brush = Display_brush_double ;
         break;
+        case PIXEL_TRIPLE:
+            Pixel = Pixel_triple ;
+            Read_pixel= Read_pixel_triple ;
+            Display_screen = Display_part_of_screen_triple ;
+            Block = Block_triple ;
+            Pixel_preview_normal = Pixel_preview_normal_triple ;
+            Pixel_preview_magnifier = Pixel_preview_magnifier_triple ;
+            Horizontal_XOR_line = Horizontal_XOR_line_triple ;
+            Vertical_XOR_line = Vertical_XOR_line_triple ;
+            Display_brush_color = Display_brush_color_triple ;
+            Display_brush_mono = Display_brush_mono_triple ;
+            Clear_brush = Clear_brush_triple ;
+            Remap_screen = Remap_screen_triple ;
+            Display_line = Display_line_on_screen_triple ;
+            Display_line_fast = Display_line_on_screen_fast_triple ;
+            Read_line = Read_line_screen_triple ;
+            Display_zoomed_screen = Display_part_of_screen_scaled_triple ;
+            Display_brush_color_zoom = Display_brush_color_zoom_triple ;
+            Display_brush_mono_zoom = Display_brush_mono_zoom_triple ;
+            Clear_brush_scaled = Clear_brush_scaled_triple ;
+            Display_brush = Display_brush_triple ;
+        break;
+        case PIXEL_WIDE2:
+            Pixel = Pixel_wide2 ;
+            Read_pixel= Read_pixel_wide2 ;
+            Display_screen = Display_part_of_screen_wide2 ;
+            Block = Block_wide2 ;
+            Pixel_preview_normal = Pixel_preview_normal_wide2 ;
+            Pixel_preview_magnifier = Pixel_preview_magnifier_wide2 ;
+            Horizontal_XOR_line = Horizontal_XOR_line_wide2 ;
+            Vertical_XOR_line = Vertical_XOR_line_wide2 ;
+            Display_brush_color = Display_brush_color_wide2 ;
+            Display_brush_mono = Display_brush_mono_wide2 ;
+            Clear_brush = Clear_brush_wide2 ;
+            Remap_screen = Remap_screen_wide2 ;
+            Display_line = Display_line_on_screen_wide2 ;
+            Display_line_fast = Display_line_on_screen_fast_wide2 ;
+            Read_line = Read_line_screen_wide2 ;
+            Display_zoomed_screen = Display_part_of_screen_scaled_wide2 ;
+            Display_brush_color_zoom = Display_brush_color_zoom_wide2 ;
+            Display_brush_mono_zoom = Display_brush_mono_zoom_wide2 ;
+            Clear_brush_scaled = Clear_brush_scaled_wide2 ;
+            Display_brush = Display_brush_wide2 ;
+        break;
+        case PIXEL_TALL2:
+            Pixel = Pixel_tall2 ;
+            Read_pixel= Read_pixel_tall2 ;
+            Display_screen = Display_part_of_screen_tall2 ;
+            Block = Block_tall2 ;
+            Pixel_preview_normal = Pixel_preview_normal_tall2 ;
+            Pixel_preview_magnifier = Pixel_preview_magnifier_tall2 ;
+            Horizontal_XOR_line = Horizontal_XOR_line_tall2 ;
+            Vertical_XOR_line = Vertical_XOR_line_tall2 ;
+            Display_brush_color = Display_brush_color_tall2 ;
+            Display_brush_mono = Display_brush_mono_tall2 ;
+            Clear_brush = Clear_brush_tall2 ;
+            Remap_screen = Remap_screen_tall2 ;
+            Display_line = Display_line_on_screen_tall2 ;
+            Display_line_fast = Display_line_on_screen_fast_tall2 ;
+            Read_line = Read_line_screen_tall2 ;
+            Display_zoomed_screen = Display_part_of_screen_scaled_tall2 ;
+            Display_brush_color_zoom = Display_brush_color_zoom_tall2 ;
+            Display_brush_mono_zoom = Display_brush_mono_zoom_tall2 ;
+            Clear_brush_scaled = Clear_brush_scaled_tall2 ;
+            Display_brush = Display_brush_tall2 ;
+        break;
+        case PIXEL_QUAD:
+            Pixel = Pixel_quad ;
+            Read_pixel= Read_pixel_quad ;
+            Display_screen = Display_part_of_screen_quad ;
+            Block = Block_quad ;
+            Pixel_preview_normal = Pixel_preview_normal_quad ;
+            Pixel_preview_magnifier = Pixel_preview_magnifier_quad ;
+            Horizontal_XOR_line = Horizontal_XOR_line_quad ;
+            Vertical_XOR_line = Vertical_XOR_line_quad ;
+            Display_brush_color = Display_brush_color_quad ;
+            Display_brush_mono = Display_brush_mono_quad ;
+            Clear_brush = Clear_brush_quad ;
+            Remap_screen = Remap_screen_quad ;
+            Display_line = Display_line_on_screen_quad ;
+            Display_line_fast = Display_line_on_screen_fast_quad ;
+            Read_line = Read_line_screen_quad ;
+            Display_zoomed_screen = Display_part_of_screen_scaled_quad ;
+            Display_brush_color_zoom = Display_brush_color_zoom_quad ;
+            Display_brush_mono_zoom = Display_brush_mono_zoom_quad ;
+            Clear_brush_scaled = Clear_brush_scaled_quad ;
+            Display_brush = Display_brush_quad ;
+        break;
     }
   }
   Screen_width = width/Pixel_width;
@@ -480,6 +591,8 @@ void Resize_image(word chosen_width,word chosen_height)
     // La nouvelle page a pu être allouée, elle est pour l'instant pleine de
     // 0s. Elle fait Main_image_width de large.
 
+    Main_image_is_modified=1;
+
     // On copie donc maintenant la partie C dans la nouvelle image.
     Copy_part_of_image_to_another(
       Screen_backup,0,0,Min(old_width,Main_image_width),

graph.h

@@ -97,22 +97,16 @@ void Draw_grad_rectangle(short rax,short ray,short rbx,short rby,short vax,short
 void Polyfill_general(int vertices, short * points, int color);
 void Polyfill(int vertices, short * points, int color);
 
-// Gestion des backups:
-void Download_infos_page_main(T_Page * page);
-void Download_infos_page_spare(T_Page * page);
-void Download_infos_backup(T_List_of_pages * list);
-void Free_all_backup_lists(void);
-int  Backup_with_new_dimensions(int upload,int width,int height);
-int  Backup_and_resize_the_spare(int width,int height);
-void Undo(void);
-void Redo(void);
-void Free_current_page(void);
-void Exchange_main_and_spare(void);
-
-void Change_magnifier_factor(byte factor_index);
-
 void Remap_picture(void);
 
-// Définition d'une fonction générique de traçage de figures:
+///
-Func_pixel Pixel_figure;
+/// All the figure-drawing functions work by calling this function for each
+/// pixel to draw. Before calling these functions, you should assign
+/// ::Pixel_figure depending on what you where you want to draw:
+/// - ::Pixel_figure_preview : On screen.
+/// - ::Pixel_figure_preview_xor : On screen, XORing the color.
+/// - ::Pixel_figure_permanent : On screen and in the image.
+/// - ::Pixel_figure_clear_preview : On screen, reverting to the image's pixels.
+extern Func_pixel Pixel_figure;
+
 void Update_part_of_screen(short x, short y, short width, short height);

helpfile.h

@@ -54,7 +54,7 @@ static const T_Help_table helptable_about[] =
   HELP_TITLE("======================")
 */
 {
-  HELP_TEXT ("") // Laisse de la place pour le logo
+  HELP_TEXT ("") // Leave enough room for a hard-coded logo, eventually.
   HELP_TEXT ("")
   HELP_TEXT ("")
   HELP_TEXT ("")
@@ -539,7 +539,8 @@ static const T_Help_table helptable_paintbrush[] =
 };
 static const T_Help_table helptable_adjust[] =
 {
-  HELP_TITLE("ADJUST PICTURE")
+  HELP_TITLE("ADJUST OR TRANSFORM")
+  HELP_TITLE("    PICTURE")
   HELP_TEXT ("")
   HELP_BOLD ("    LEFT CLICK")
   HELP_LINK ("(Key:%s)",0x100+BUTTON_ADJUST)
@@ -558,8 +559,24 @@ static const T_Help_table helptable_adjust[] =
   HELP_BOLD ("    RIGHT CLICK")
   HELP_LINK ("(Key:%s)",0x200+BUTTON_ADJUST)
   HELP_TEXT ("")
-  HELP_TEXT ("        *** Not implemented yet ***")
+  HELP_TEXT ("Opens the Picture Transform menu.")
-
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TITLE("PICTURE TRANSFORM")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
+  HELP_TEXT ("")
 };
 static const T_Help_table helptable_draw[] =
 {
@@ -1079,7 +1096,15 @@ static const T_Help_table helptable_brush_fx[] =
   HELP_TEXT ("because it's the only way for cancelling)")
   HELP_TEXT ("")
   HELP_LINK ("- Distort: (Key:%s)",SPECIAL_DISTORT)
-  HELP_TEXT ("*** Not implemented yet ***")
+  HELP_TEXT ("Triggers an interactive operation")
+  HELP_TEXT ("that allows you to distort your brush.")
+  HELP_TEXT ("Start by placing the brush somewhere on the")
+  HELP_TEXT ("screen and left-click. The brush will")
+  HELP_TEXT ("appear, with a little peg at each corner.")
+  HELP_TEXT ("Use the left mouse button to displace the")
+  HELP_TEXT ("corners, which will deform the brush.")
+  HELP_TEXT ("When you're done, click the right mouse")
+  HELP_TEXT ("button.")
   HELP_TEXT ("")
   HELP_LINK ("- Outline: (Key:%s)",SPECIAL_OUTLINE)
   HELP_TEXT ("This option permits to draw the")

init.c

@@ -66,6 +66,8 @@
 #include "mountlist.h" // read_file_system_list
 #include "loadsave.h" // Image_emergency_backup
 #include "init.h"
+#include "transform.h"
+
 
 // Rechercher la liste et le type des lecteurs de la machine
 
@@ -822,12 +824,11 @@ void Init_buttons(void)
                      Do_nothing,
                      FAMILY_INSTANT);
 
-// !!! TEMPORAIRE !!!
   Init_button(BUTTON_ADJUST,
                      0,18,
                      16,16,
                      BUTTON_SHAPE_RECTANGLE,
-                     Button_Adjust,Message_not_implemented,
+                     Button_Adjust,Button_Transform_menu,
                      Do_nothing,
                      FAMILY_TOOL);
 
@@ -1322,6 +1323,22 @@ void Init_operations(void)
   Init_operation(OPERATION_ROTATE_BRUSH,2,5,
                         Rotate_brush_2_5,1);
 
+  Init_operation(OPERATION_DISTORT_BRUSH,0,0,
+                        Distort_brush_0_0,0);
+  Init_operation(OPERATION_DISTORT_BRUSH,1,0,
+                        Distort_brush_1_0,0);
+  Init_operation(OPERATION_DISTORT_BRUSH,1,8,
+                        Distort_brush_1_8,0);
+  Init_operation(OPERATION_DISTORT_BRUSH,2,8,
+                        Distort_brush_2_8,1);
+  Init_operation(OPERATION_DISTORT_BRUSH,2,0,
+                        Distort_brush_2_0,1);
+  Init_operation(OPERATION_DISTORT_BRUSH,1,9,
+                        Distort_brush_1_9,0);
+  Init_operation(OPERATION_DISTORT_BRUSH,0,9,
+                        Distort_brush_0_9,0);
+
+
   Init_operation(OPERATION_POLYBRUSH,1,0,
                         Filled_polyform_12_0,1);
   Init_operation(OPERATION_POLYBRUSH,2,0,

input.c

@@ -88,12 +88,25 @@ int Is_shortcut(word Key, word function)
 int Move_cursor_with_constraints()
 {
   int feedback=0;
+  byte bl=0;//BL va indiquer si on doit corriger la position du curseur
   
+  // Clip mouse to the editing area. There can be a border when using big 
+  // pixels, if the SDL screen dimensions are not factors of the pixel size.
+  if (Input_new_mouse_Y>=Screen_height)
+  {
+      Input_new_mouse_Y=Screen_height-1;
+      bl=1;
+  }
+  if (Input_new_mouse_X>=Screen_width)
+  {
+      Input_new_mouse_X=Screen_width-1;
+      bl=1;
+  }
   //Gestion "avancée" du curseur: interdire la descente du curseur dans le
   //menu lorsqu'on est en train de travailler dans l'image
   if (Operation_stack_size != 0)
   {
-        byte bl=0;//BL va indiquer si on doit corriger la position du curseur
+        
 
         //Si le curseur ne se trouve plus dans l'image
         if(Menu_Y<=Input_new_mouse_Y)
@@ -122,14 +135,13 @@ int Move_cursor_with_constraints()
                 }
             }
         }
-
+  }
-        if (bl)
+  if (bl)
-        {
+  {
-            SDL_WarpMouse(
+      SDL_WarpMouse(
-                    Input_new_mouse_X*Pixel_width,
+              Input_new_mouse_X*Pixel_width,
-                    Input_new_mouse_Y*Pixel_height
+              Input_new_mouse_Y*Pixel_height
-                    );
+              );
-        }
   }
   if ((Input_new_mouse_X != Mouse_X) ||
     (Input_new_mouse_Y != Mouse_Y) ||

main.c

@@ -79,14 +79,18 @@ static char Gui_skin_file[MAX_PATH_CHARACTERS]= "skins" PATH_SEPARATOR "base.gif
 void Display_syntax(void)
 {
   int mode_index;
-  printf("Syntax: GFX2 [<arguments>] [<picture>]\n\n");
+  printf("Syntax: grafx2 [<arguments>] [<picture>]\n\n");
   printf("<arguments> can be:]\n");
-  printf("\t/? /h /help        for this help screen\n");
+  printf("\t/? /h /help       for this help screen\n");
-  printf("\t/wide              to emulate a video mode with wide pixels (2x1)\n");
+  printf("\t/wide             to emulate a video mode with wide pixels (2x1)\n");
-  printf("\t/tall              to emulate a video mode with tall pixels (1x2)\n");
+  printf("\t/tall             to emulate a video mode with tall pixels (1x2)\n");
-  printf("\t/double            to emulate a video mode with double pixels (2x2)\n");
+  printf("\t/double           to emulate a video mode with double pixels (2x2)\n");
-  printf("\t/skin <filename>   use an alternate file with the menu graphics\n");
+  printf("\t/wide2            to emulate a video mode with double wide pixels (4x2)\n");
-  printf("\t/mode <videomode>  to set a video mode\n\n");
+  printf("\t/tall2            to emulate a video mode with double tall pixels (2x4)\n");
+  printf("\t/triple           to emulate a video mode with triple pixels (3x3)\n");
+  printf("\t/quadruple        to emulate a video mode with quadruple pixels (4x4)\n");
+  printf("\t/skin <filename>  use an alternate file with the menu graphics\n");
+  printf("\t/mode <videomode> to set a video mode\n\n");
   printf("Available video modes:\n\n");
   for (mode_index=0; mode_index<Nb_video_modes; mode_index++)
     printf("\t%s\n",Mode_label(mode_index));
@@ -217,6 +221,22 @@ void Analyze_command_line(int argc,char * argv[])
     {
       Pixel_ratio = PIXEL_DOUBLE;
     }
+    else if ( !strcmp(argv[index],"/triple") )
+    {
+      Pixel_ratio = PIXEL_DOUBLE;
+    }
+    else if ( !strcmp(argv[index],"/quadruple") )
+    {
+      Pixel_ratio = PIXEL_QUAD;
+    }
+    else if ( !strcmp(argv[index],"/tall2") )
+    {
+      Pixel_ratio = PIXEL_TALL2;
+    }
+    else if ( !strcmp(argv[index],"/wide2") )
+    {
+      Pixel_ratio = PIXEL_WIDE2;
+    }
     else if ( !strcmp(argv[index],"/rgb") )
     {
       // echelle des composants RGB

misc.c

@@ -282,32 +282,31 @@ byte Read_pixel_from_spare_screen(word x,word y)
   return *(Spare_screen+y*Spare_image_width+x);
 }
 
-void Rotate_90_deg_lowlevel(byte * source,byte * dest)
+void Rotate_90_deg_lowlevel(byte * source, byte * dest, short width, short height)
 {
-  byte* esi;
+  word x,y;
-  byte* edi;
-  word dx,bx,cx;
 
-  //ESI = Point haut droit de la source
+  for(y=0;y<height;y++)
-  byte* Debut_de_colonne = source + Brush_width - 1;
-  edi = dest;
-
-  // Largeur de la source = hauteur de la destination
-  dx = bx = Brush_width;
-
-  // Pour chaque ligne
-  for(dx = Brush_width;dx>0;dx--)
   {
-    esi = Debut_de_colonne;
+    for(x=0;x<width;x++)
-    // Pout chaque colonne
-    for(cx=Brush_height;cx>0;cx--)
     {
-      *edi = *esi;
+      *(dest+height*(width-1-x)+y)=*source;
-      esi+=Brush_width;
+      source++;  
-      edi++;
     }
+  }
+}
 
-    Debut_de_colonne--;
+void Rotate_270_deg_lowlevel(byte * source, byte * dest, short width, short height)
+{
+  word x,y;
+
+  for(y=0;y<height;y++)
+  {
+    for(x=0;x<width;x++)
+    {
+      *(dest+(height-1-y)+x*height)=*source;
+      source++;  
+    }
   }
 }
 
@@ -486,13 +485,12 @@ void Check_timer(void)
   if((SDL_GetTicks()/55)-Timer_delay>Timer_start) Timer_state=1;
 }
 
-// Effectue une inversion de la brosse selon une droite horizontale
+void Flip_Y_lowlevel(byte *src, short width, short height)
-void Flip_Y_lowlevel(void)
 {
   // ESI pointe sur la partie haute de la brosse
   // EDI sur la partie basse
-  byte* ESI = Brush ;
+  byte* ESI = src ;
-  byte* EDI = Brush + (Brush_height - 1) *Brush_width;
+  byte* EDI = src + (height - 1) *width;
   byte tmp;
   word cx;
 
@@ -501,7 +499,7 @@ void Flip_Y_lowlevel(void)
     // Il faut inverser les lignes pointées par ESI et
     // EDI ("Brush_width" octets en tout)
 
-    for(cx = Brush_width;cx>0;cx--)
+    for(cx = width;cx>0;cx--)
     {
       tmp = *ESI;
       *ESI = *EDI;
@@ -514,57 +512,65 @@ void Flip_Y_lowlevel(void)
     // ESI pointe déjà sur le début de la ligne suivante
     // EDI pointe sur la fin de la ligne en cours, il
     // doit pointer sur le début de la précédente...
-    EDI -= 2 * Brush_width; // On recule de 2 lignes
+    EDI -= 2 * width; // On recule de 2 lignes
   }
 }
 
-// Effectue une inversion de la brosse selon une droite verticale
+void Flip_X_lowlevel(byte *src, short width, short height)
-void Flip_X_lowlevel(void)
 {
   // ESI pointe sur la partie gauche et EDI sur la partie
   // droite
-  byte* ESI = Brush;
+  byte* ESI = src;
-  byte* EDI = Brush + Brush_width - 1;
+  byte* EDI = src + width - 1;
 
-  byte* Debut_Ligne;
+  byte* line_start;
-  byte* Fin_Ligne;
+  byte* line_end;
   byte tmp;
   word cx;
 
   while(ESI<EDI)
   {
-    Debut_Ligne = ESI;
+    line_start = ESI;
-    Fin_Ligne = EDI;
+    line_end = EDI;
 
     // On échange par colonnes
-    for(cx=Brush_height;cx>0;cx--)
+    for(cx=height;cx>0;cx--)
     {
       tmp=*ESI;
       *ESI=*EDI;
       *EDI=tmp;
-      EDI+=Brush_width;
+      EDI+=width;
-      ESI+=Brush_width;
+      ESI+=width;
     }
 
     // On change de colonne
     // ESI > colonne suivante
     // EDI > colonne précédente
-    ESI = Debut_Ligne + 1;
+    ESI = line_start + 1;
-    EDI = Fin_Ligne - 1;
+    EDI = line_end - 1;
   }
 }
 
-// Faire une rotation de 180º de la brosse
+// Rotate a pixel buffer 180º on itself.
-void Rotate_180_deg_lowlevel(void)
+void Rotate_180_deg_lowlevel(byte *src, short width, short height)
 {
   // ESI pointe sur la partie supérieure de la brosse
   // EDI pointe sur la partie basse
-  byte* ESI = Brush;
+  byte* ESI = src;
-  byte* EDI = Brush + Brush_height*Brush_width - 1;
+  byte* EDI = src + height*width - 1;
   // EDI pointe sur le dernier pixel de la derniere ligne
   byte tmp;
   word cx;
 
+  // In case of odd height, the algorithm in this function would
+  // miss the middle line, so we do it this way:
+  if (height & 1)
+  {
+    Flip_X_lowlevel(src, width, height);
+    Flip_Y_lowlevel(src, width, height);
+    return;
+  }
+
   while(ESI < EDI)
   {
     // On échange les deux lignes pointées par EDI et
@@ -572,7 +578,7 @@ void Rotate_180_deg_lowlevel(void)
     // En même temps, on échange les pixels, donc EDI
     // pointe sur la FIN de sa ligne
 
-    for(cx=Brush_width;cx>0;cx--)
+    for(cx=width;cx>0;cx--)
     {
       tmp = *ESI;
       *ESI = *EDI;
@@ -584,6 +590,55 @@ void Rotate_180_deg_lowlevel(void)
   }
 }
 
+void Rescale(byte *src_buffer, short src_width, short src_height, byte *dst_buffer, short dst_width, short dst_height, short x_flipped, short y_flipped)
+{
+  int    offset,line,column;
+
+  int    x_pos_in_brush;   // Position courante dans l'ancienne brosse
+  int    y_pos_in_brush;
+  int    delta_x_in_brush; // "Vecteur incrémental" du point précédent
+  int    delta_y_in_brush;
+  int    initial_x_pos;       // Position X de début de parcours de ligne
+  
+  // Calcul du "vecteur incrémental":
+  delta_x_in_brush=(src_width<<16) * (x_flipped?-1:1) / (dst_width);
+  delta_y_in_brush=(src_height<<16) * (y_flipped?-1:1) / (dst_height);
+
+  offset=0;
+
+  // Calcul de la valeur initiale de y_pos:
+  if (y_flipped)
+    y_pos_in_brush=(src_height<<16)-1; // Inversion en Y de la brosse
+  else
+    y_pos_in_brush=0;                // Pas d'inversion en Y de la brosse
+
+  // Calcul de la valeur initiale de x_pos pour chaque ligne:
+  if (x_flipped)
+    initial_x_pos = (src_width<<16)-1; // Inversion en X de la brosse
+  else
+    initial_x_pos = 0;                // Pas d'inversion en X de la brosse
+  
+  // Pour chaque ligne
+  for (line=0;line<dst_height;line++)
+  {
+    // On repart du début de la ligne:
+    x_pos_in_brush=initial_x_pos;
+
+    // Pour chaque colonne:
+    for (column=0;column<dst_width;column++)
+    {
+      // On copie le pixel:
+      dst_buffer[offset]=*(src_buffer + (x_pos_in_brush>>16) + (y_pos_in_brush>>16)*src_width);
+      // On passe à la colonne de brosse suivante:
+      x_pos_in_brush+=delta_x_in_brush;
+      // On passe au pixel suivant de la nouvelle brosse:
+      offset++;
+    }
+    // On passe à la ligne de brosse suivante:
+    y_pos_in_brush+=delta_y_in_brush;
+  }
+}
+
 void Slider_timer(byte speed)
 //Boucle d'attente pour faire bouger les scrollbars à une vitesse correcte
 {

misc.h

@@ -84,10 +84,52 @@ byte Effect_additive_colorize    (word x,word y,byte color);
 byte Effect_substractive_colorize(word x,word y,byte color);
 byte Effect_sieve(word x,word y);
 
-void Flip_Y_lowlevel(void);
+///
-void Flip_X_lowlevel(void);
+/// Inverts a pixel buffer, according to a horizontal axis.
-void Rotate_90_deg_lowlevel(byte * source,byte * dest);
+/// @param src    Pointer to the pixel buffer to process.
-void Rotate_180_deg_lowlevel(void);
+/// @param width  Width of the buffer.
+/// @param height Height of the buffer.
+void Flip_Y_lowlevel(byte *src, short width, short height);
+
+///
+/// Inverts a pixel buffer, according to a vertical axis.
+/// @param src    Pointer to the pixel buffer to process.
+/// @param width  Width of the buffer.
+/// @param height Height of the buffer.
+void Flip_X_lowlevel(byte *src, short width, short height);
+///
+/// Rotate a pixel buffer by 90 degrees, clockwise.
+/// @param source Source pixel buffer.
+/// @param dest Destination pixel buffer.
+/// @param width Width of the original buffer (height of the destination one).
+/// @param height Height of the original buffer (width of the destination one).
+void Rotate_90_deg_lowlevel(byte * source, byte * dest, short width, short height);
+///
+/// Rotate a pixel buffer by 90 degrees, counter-clockwise.
+/// @param source Source pixel buffer.
+/// @param dest Destination pixel buffer.
+/// @param width Width of the original buffer (height of the destination one).
+/// @param height Height of the original buffer (width of the destination one).
+void Rotate_270_deg_lowlevel(byte * source, byte * dest, short width, short height);
+///
+/// Rotate a pixel buffer by 180 degrees.
+/// @param src The pixel buffer (source and destination).
+/// @param width Width of the buffer.
+/// @param height Height of the buffer.
+void Rotate_180_deg_lowlevel(byte *src, short width, short height);
+
+///
+/// Copies an image to another, rescaling it and optionally flipping it.
+/// @param src_buffer Original image (address of first byte)
+/// @param src_width  Original image's width in pixels
+/// @param src_height Original image's height in pixels
+/// @param dst_buffer Destination image (address of first byte)
+/// @param dst_width  Destination image's width in pixels
+/// @param dst_height Destination image's height in pixels
+/// @param x_flipped  Boolean, true to flip the image horizontally
+/// @param y_flipped  Boolean, true to flip the image vertically
+void Rescale(byte *src_buffer, short src_width, short src_height, byte *dst_buffer, short dst_width, short dst_height, short x_flipped, short y_flipped);
+
 void Zoom_a_line(byte * original_line,byte * zoomed_line,word factor,word width);
 void Copy_part_of_image_to_another(byte * source,word source_x,word source_y,word width,word height,word source_width,byte * dest,word dest_x,word dest_y,word destination_width);
 

operatio.c

@@ -157,6 +157,35 @@ void Display_coords_rel_or_abs(short start_x, short start_y)
     Print_coordinates();
 }
 
+/// Simulates clicking the "Draw" button.
+void Return_to_draw_mode(void)
+{
+
+  // Comme l'enclenchement du bouton efface le curseur, il faut l'afficher au
+  // préalable:
+  Display_cursor();
+  if (Mouse_K)
+    Wait_end_of_click();
+  // !!! Efface la croix puis affiche le viseur !!!
+  Unselect_button(BUTTON_DRAW,LEFT_SIDE); // Désenclenche au passage le bouton brosse
+  if (Config.Auto_discontinuous)
+  {
+    // On se place en mode Dessin discontinu à la main
+    while (Current_operation!=OPERATION_DISCONTINUOUS_DRAW)
+      Unselect_button(BUTTON_DRAW,RIGHT_SIDE);
+  }
+  // Maintenant, il faut réeffacer le curseur parce qu'il sera raffiché en fin
+  // d'appel à cette action:
+  Hide_cursor();
+
+  // On passe en brosse couleur:
+  Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
+
+  if ((Config.Coords_rel) && (Menu_is_visible))
+    Print_in_menu("X:       Y:",0);
+  Print_coordinates();
+}
+
 //////////////////////////////////////////////////// OPERATION_CONTINUOUS_DRAW
 
 void Freehand_mode1_1_0(void)
@@ -2955,29 +2984,7 @@ void Brush_0_5(void)
     Brush_offset_Y=(Brush_offset_Y/Snap_height)*Snap_height;
   }
 
-  // Simuler l'appui du bouton "Dessin"
+  Return_to_draw_mode();
-
-  // Comme l'enclenchement du bouton efface le curseur, il faut l'afficher au
-  // préalable:
-  Display_cursor();
-  // !!! Efface la croix puis affiche le viseur !!!
-  Unselect_button(BUTTON_DRAW,LEFT_SIDE); // Désenclenche au passage le bouton brosse
-  if (Config.Auto_discontinuous)
-  {
-    // On se place en mode Dessin discontinu à la main
-    while (Current_operation!=OPERATION_DISCONTINUOUS_DRAW)
-      Unselect_button(BUTTON_DRAW,RIGHT_SIDE);
-  }
-  // Maintenant, il faut réeffacer le curseur parce qu'il sera raffiché en fin
-  // d'appel à cette action:
-  Hide_cursor();
-
-  // On passe en brosse couleur:
-  Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
-
-  if ((Config.Coords_rel) && (Menu_is_visible))
-    Print_in_menu("X:       Y:",0);
-  Print_coordinates();
 }
 
 
@@ -3100,27 +3107,7 @@ void Polybrush_12_8(void)
       Brush_offset_Y=(Brush_offset_Y/Snap_height)*Snap_height;
     }
     
-    // Simuler l'appui du bouton "Dessin"
+    Return_to_draw_mode();
-
-    // Comme l'enclenchement du bouton efface le curseur, il faut l'afficher au
-    // préalable:
-    Display_cursor();
-    Wait_end_of_click();
-    // !!! Efface la croix puis affiche le viseur !!!
-    Unselect_button(BUTTON_DRAW,LEFT_SIDE); // Désenclenche au passage le bouton brosse
-    if (Config.Auto_discontinuous)
-    {
-      // On se place en mode Dessin discontinu à la main
-      while (Current_operation!=OPERATION_DISCONTINUOUS_DRAW)
-        Unselect_button(BUTTON_DRAW,RIGHT_SIDE);
-    }
-    // Maintenant, il faut réeffacer le curseur parce qu'il sera raffiché en fin
-    // d'appel à cette action:
-    Hide_cursor();
-
-    // On passe en brosse couleur:
-    Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
-
     Display_cursor();
   }
 }
@@ -3398,31 +3385,7 @@ void Stretch_brush_2_7(void)
   // Et enfin on stocke pour de bon la nouvelle brosse étirée
   Stretch_brush(start_x,start_y,computed_x,computed_y);
 
-  // Simuler l'appui du bouton "Dessin"
+  Return_to_draw_mode();
-
-  // Comme l'enclenchement du bouton efface le curseur, il faut l'afficher au
-  // préalable:
-  Display_cursor();
-  // !!! Efface la croix puis affiche le viseur !!!
-  Unselect_button(BUTTON_DRAW,LEFT_SIDE); // Désenclenche au passage le bouton brosse
-  if (Config.Auto_discontinuous)
-  {
-    // On se place en mode Dessin discontinu à la main
-    while (Current_operation!=OPERATION_DISCONTINUOUS_DRAW)
-      Unselect_button(BUTTON_DRAW,RIGHT_SIDE);
-  }
-  // Maintenant, il faut réeffacer le curseur parce qu'il sera raffiché en fin
-  // d'appel à cette action:
-  Hide_cursor();
-
-  // On passe en brosse couleur:
-  Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
-
-  if ((Config.Coords_rel) && (Menu_is_visible))
-    Print_in_menu("X:       Y:",0);
-  Print_coordinates();
-
-  // Inutile de de faire un Wait_end_of_click car c'est fait dans Unselect_button
 }
 
 
@@ -3650,33 +3613,261 @@ void Rotate_brush_2_5(void)
   // Et enfin on stocke pour de bon la nouvelle brosse étirée
   Rotate_brush(angle);
 
-  // Simuler l'appui du bouton "Dessin"
+  Return_to_draw_mode();
-
-  // Comme l'enclenchement du bouton efface le curseur, il faut l'afficher au
-  // préalable:
-  Display_cursor();
-  // !!! Efface le curseur de l'opération puis affiche le viseur !!!
-  Unselect_button(BUTTON_DRAW,LEFT_SIDE); // Désenclenche au passage le bouton brosse
-  if (Config.Auto_discontinuous)
-  {
-    // On se place en mode Dessin discontinu à la main
-    while (Current_operation!=OPERATION_DISCONTINUOUS_DRAW)
-      Unselect_button(BUTTON_DRAW,RIGHT_SIDE);
-  }
-  // Maintenant, il faut réeffacer le curseur parce qu'il sera raffiché en fin
-  // d'appel à cette action:
-  Hide_cursor();
-
-  // On passe en brosse couleur:
-  Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
-
-  if ((Config.Coords_rel) && (Menu_is_visible))
-    Print_in_menu("X:       Y:",0);
-  Print_coordinates();
-
-  // Inutile de de faire un Wait_end_of_click car c'est fait dans Unselect_button
 }
 
+///////////////////////////////////////////////////// OPERATION_DISTORT_BRUSH
+
+/// Draws a 2x2 XOR square at the specified picture coordinates, on the screen.
+void Draw_stretch_spot(short x_pos, short y_pos)
+{
+  short x,y;
+
+  for (y=y_pos-1;y<y_pos+1;y++)
+    if (y>=Limit_top && y<=Limit_visible_bottom)
+      for (x=x_pos-1;x<x_pos+1;x++)
+        if (x>=Limit_left && x<=Limit_visible_right)
+          Pixel_preview(x,y,~Read_pixel(x-Main_offset_X,y-Main_offset_Y));
+  Update_part_of_screen(x_pos-1, y_pos-1, 2, 2);
+}
+
+void Distort_brush_0_0(void)
+//
+// Opération   : OPERATION_DISTORT_BRUSH
+// Click Souris: 0
+// Taille_Pile : 0
+//
+// Souris effacée: Non
+//
+{
+  if ( Menu_is_visible )
+  {
+      Print_in_menu("POSITION BRUSH TO START ",0);
+  }
+}
+
+void Distort_brush_1_0(void)
+//
+// Opération   : OPERATION_DISTORT_BRUSH
+// Click Souris: 1
+// Taille_Pile : 0
+//
+// Souris effacée: Non
+//
+{
+  short x_pos, y_pos;
+
+  Init_start_operation();
+  Paintbrush_hidden=1;
+  Hide_cursor();
+  
+  // Top left angle
+  x_pos=Paintbrush_X-Brush_offset_X;
+  y_pos=Paintbrush_Y-Brush_offset_Y;
+  Draw_stretch_spot(x_pos,y_pos);
+  Operation_push(x_pos);
+  Operation_push(y_pos);
+  
+  // Top right angle
+  x_pos+=Brush_width;
+  Draw_stretch_spot(x_pos,y_pos);
+  Operation_push(x_pos);
+  Operation_push(y_pos);
+  
+  // Bottom right angle
+  y_pos+=Brush_height;
+  Draw_stretch_spot(x_pos,y_pos);
+  Operation_push(x_pos);
+  Operation_push(y_pos);
+  
+  // Bottom left angle
+  x_pos-=Brush_width;
+  Draw_stretch_spot(x_pos,y_pos);
+  Operation_push(x_pos);
+  Operation_push(y_pos);
+  
+  Distort_brush_preview(
+    Operation_stack[1],
+    Operation_stack[2],
+    Operation_stack[3],
+    Operation_stack[4],
+    Operation_stack[5],
+    Operation_stack[6],
+    Operation_stack[7],
+    Operation_stack[8]);
+  Display_cursor();
+  Update_part_of_screen(Paintbrush_X-Brush_offset_X, Paintbrush_Y-Brush_offset_Y, Brush_width, Brush_height);
+  Wait_end_of_click();
+  // Erase the message in status bar
+  if ( (Config.Coords_rel) && (Menu_is_visible) )
+  {
+      Print_in_menu("X:       Y:             ",0);
+  }
+}
+
+void Distort_brush_1_8(void)
+//
+//  Opération   : OPERATION_DISTORT_BRUSH
+//  Click Souris: 1
+//  Taille_Pile : 8
+//
+//  Souris effacée: No
+//
+{
+  // How far (in pixels) you can catch a handle
+  #define REACH_DISTANCE 100
+  short i;
+  short x[4];
+  short y[4];
+  long best_distance=REACH_DISTANCE;
+  short best_spot=-1;
+
+  for (i=3;i>=0;i--)
+  {
+    long distance;
+    Operation_pop(&y[i]);
+    Operation_pop(&x[i]);
+    distance=Distance(Paintbrush_X,Paintbrush_Y,x[i],y[i]);
+    if (distance<best_distance)
+    {
+      best_spot=i;
+      best_distance=distance;
+    }
+  }
+  
+  for (i=0;i<4;i++)
+  {
+    Operation_push(x[i]);
+    Operation_push(y[i]);
+  }
+  
+  if (best_spot>-1)
+  {
+    Operation_push(best_spot);
+  }
+  if ( (Config.Coords_rel) && (Menu_is_visible) )
+  {
+      Print_in_menu("X:       Y:             ",0);
+      Print_coordinates();
+  }
+}
+
+void Distort_brush_1_9(void)
+//
+//  Opération   : OPERATION_DISTORT_BRUSH
+//  Click Souris: 1
+//  Taille_Pile : 9
+//
+//  Souris effacée: No
+//
+{
+  short i;
+  short x[4];
+  short y[4];
+  short selected_corner;
+
+  // Pop all arguments
+  Operation_pop(&selected_corner);
+  for (i=3;i>=0;i--)
+  {
+    Operation_pop(&y[i]);
+    Operation_pop(&x[i]);
+  }
+  
+  if (Paintbrush_X!=x[selected_corner] || Paintbrush_Y!=y[selected_corner])
+  {  
+    Hide_cursor();
+    
+    // Easiest refresh mode: make no assumptions on how the brush was
+    // displayed before.
+    Display_all_screen();
+
+    x[selected_corner]=Paintbrush_X;
+    y[selected_corner]=Paintbrush_Y;
+
+    for (i=0;i<4;i++)
+      Draw_stretch_spot(x[i],y[i]);
+
+    Distort_brush_preview(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]);
+
+    Display_cursor();
+    
+    if ( (Config.Coords_rel) && (Menu_is_visible) )
+    {
+        Print_in_menu("X:       Y:             ",0);
+        Print_coordinates();
+    }
+    Update_rect(0,0,Screen_width,Menu_Y);
+  }
+  
+  // Push back all arguments
+  for (i=0;i<4;i++)
+  {
+    Operation_push(x[i]);
+    Operation_push(y[i]);
+  }
+  Operation_push(selected_corner);
+
+}
+void Distort_brush_0_9(void)
+//
+//  Opération   : OPERATION_DISTORT_BRUSH
+//  Click Souris: 0
+//  Taille_Pile : 9
+//
+//  Souris effacée: No
+//
+{
+  short selected_corner;
+  Operation_pop(&selected_corner);
+  
+}
+
+void Distort_brush_2_0(void)
+//
+// Opération   : OPERATION_DISTORT_BRUSH
+// Click Souris: 2
+// Taille_Pile : 0
+//
+// Souris effacée: Oui
+//
+{
+  Paintbrush_hidden=0;
+  Display_all_screen();
+  // Erase the message in status bar
+  if ( (Config.Coords_rel) && (Menu_is_visible) )
+  {
+      Print_in_menu("X:       Y:             ",0);
+  }
+  Return_to_draw_mode();
+}
+
+void Distort_brush_2_8(void)
+//
+// Opération   : OPERATION_DISTORT_BRUSH
+// Click Souris: 2
+// Taille_Pile : 8
+//
+// Souris effacée: Oui
+//
+{
+  short i;
+  short x[4];
+  short y[4];
+
+  // Pop all arguments
+  for (i=3;i>=0;i--)
+  {
+    Operation_pop(&y[i]);
+    Operation_pop(&x[i]);
+  }
+  Distort_brush(x[0],y[0],x[1],y[1],x[2],y[2],x[3],y[3]);
+  
+  Paintbrush_hidden=0;
+  Display_all_screen();
+  
+  Return_to_draw_mode();
+}
 
 //////////////////////////////////////////////////////////// OPERATION_SCROLL
 

operatio.h

@@ -100,6 +100,16 @@ void Rotate_brush_1_5(void);
 void Rotate_brush_0_5(void);
 void Rotate_brush_2_5(void);
 
+///////////////////////////////////////////////////// OPERATION_DISTORT_BRUSH
+
+void Distort_brush_0_0(void);
+void Distort_brush_1_0(void);
+void Distort_brush_2_0(void);
+void Distort_brush_1_8(void);
+void Distort_brush_2_8(void);
+void Distort_brush_1_9(void);
+void Distort_brush_0_9(void);
+
 //////////////////////////////////////////////////////// OPERATION_POLYBRUSH
 
 void Polybrush_12_8(void);

pxdouble.c

@@ -36,26 +36,26 @@
 void Pixel_double (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
-  *(Screen_pixels + x * 2 + y * 4 * Screen_width)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
-  *(Screen_pixels + x * 2 + y * 4 * Screen_width + 1)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
-  *(Screen_pixels + x * 2 + (y * 4 + 2 )* Screen_width)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1)* VIDEO_LINE_WIDTH)=color;
-  *(Screen_pixels + x * 2 + (y * 4 + 2 )* Screen_width + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1)* VIDEO_LINE_WIDTH + 1)=color;
 }
 
 byte Read_pixel_double (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * 4 * Screen_width + x * 2);
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
 }
 
 void Block_double (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
   SDL_Rect rectangle;
-  rectangle.x=start_x*2;
+  rectangle.x=start_x*ZOOMX;
-  rectangle.y=start_y*2;
+  rectangle.y=start_y*ZOOMY;
-  rectangle.w=width*2;
+  rectangle.w=width*ZOOMX;
-  rectangle.h=height*2;
+  rectangle.h=height*ZOOMY;
   SDL_FillRect(Screen_SDL,&rectangle,color);
 }
 
@@ -75,14 +75,14 @@ void Display_part_of_screen_double (word width,word height,word image_width)
     {
       *(dest+1)=*dest=*src;
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+Screen_width*ZOOMX,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
     
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=Screen_width*4 - width*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -127,29 +127,29 @@ void Pixel_preview_magnifier_double  (word x,word y,byte color)
 void Horizontal_XOR_line_double(word x_pos,word y_pos,word width)
 {
   //On calcule la valeur initiale de dest:
-  byte* dest=y_pos*4*Screen_width+x_pos*2+Screen_pixels;
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
 
   int x;
 
-  for (x=0;x<width*2;x+=2)
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
-    *(dest+x+2*Screen_width+1)=*(dest+x+2*Screen_width)=*(dest+x+1)=*(dest+x)=~*(dest+x);
+    *(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+1)=*(dest+x)=~*(dest+x);
 }
 
 void Vertical_XOR_line_double(word x_pos,word y_pos,word height)
 {
   int i;
-  byte *dest=Screen_pixels+x_pos*2+y_pos*Screen_width*4;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
   for (i=height;i>0;i--)
   {
-    *dest=*(dest+1)=*(dest+Screen_width*2)=*(dest+Screen_width*2+1)=~*dest;
+    *dest=*(dest+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=~*dest;
-    dest+=Screen_width*4;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
   }
 }
 
 void Display_brush_color_double(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 4 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   // src = Position dans la brosse
   byte* src = Brush + y_offset * brush_width + x_offset;
 
@@ -164,16 +164,16 @@ void Display_brush_color_double(word x_pos,word y_pos,word x_offset,word y_offse
       // On vérifie que ce n'est pas la transparence
       if(*src != transp_color)
       {
-        *(dest+Screen_width*2+1) = *(dest+Screen_width*2) = *(dest+1) = *dest = *src;
+        *(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + Screen_width*4 - width*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -184,7 +184,7 @@ void Display_brush_mono_double(word x_pos, word y_pos,
         byte transp_color, byte color, word brush_width)
 /* On affiche la brosse en monochrome */
 {
-  byte* dest=y_pos*4*Screen_width+x_pos*2+Screen_pixels; // dest = adr destination à 
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
       // l'écran
   byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
       // la brosse
@@ -197,23 +197,23 @@ void Display_brush_mono_double(word x_pos, word y_pos,
     //Pour chaque pixel
     {
       if (*src!=transp_color)
-        *(dest+Screen_width*2+1)=*(dest+Screen_width*2)=*(dest+1)=*dest=color;
+        *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=color;
 
       // On passe au pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=Screen_width*4-width*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
 
 void Clear_brush_double(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos*2+y_pos*4*Screen_width; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
   byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
   int y;
   int x;
@@ -224,16 +224,16 @@ void Clear_brush_double(word x_pos,word y_pos,__attribute__((unused)) word x_off
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
-      *(dest+Screen_width*2+1)=*(dest+Screen_width*2)=*(dest+1)=*dest=*src;
+      *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
 
       // On passe au pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=Screen_width*4-width*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -242,7 +242,7 @@ void Clear_brush_double(word x_pos,word y_pos,__attribute__((unused)) word x_off
 void Display_brush_double(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 4 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   // src = Position dans la brosse
   byte* src = brush + y_offset * brush_width + x_offset;
   
@@ -257,15 +257,15 @@ void Display_brush_double(byte * brush, word x_pos,word y_pos,word x_offset,word
       // On vérifie que ce n'est pas la transparence
       if(*src != transp_color)
       {
-        *(dest+Screen_width*2+1)=*(dest+Screen_width*2)=*(dest+1)=*dest=*src;
+        *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
       }
 
       // Pixel suivant
-      src++; dest+=2;
+      src++; dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + Screen_width*4 - width*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -273,7 +273,7 @@ void Display_brush_double(byte * brush, word x_pos,word y_pos,word x_offset,word
 void Remap_screen_double(word x_pos,word y_pos,word width,word height,byte * conversion_table)
 {
   // dest = coords a l'écran
-  byte* dest = Screen_pixels + y_pos * 4 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   int x,y;
 
   // Pour chaque ligne
@@ -282,12 +282,12 @@ void Remap_screen_double(word x_pos,word y_pos,word width,word height,byte * con
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
-      *(dest+Screen_width*2+1)=*(dest+Screen_width*2)=*(dest+1)=*dest=
+      *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=
         conversion_table[*dest];
-      dest +=2;
+      dest +=ZOOMX;
     }
 
-    dest = dest + Screen_width*4 - width*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -297,8 +297,8 @@ void Display_line_on_screen_fast_double(word x_pos,word y_pos,word width,byte *
 /* On affiche toute une ligne de pixels telle quelle. */
 /* Utilisée si le buffer contient déja des pixel doublés. */
 {
-  memcpy(Screen_pixels+x_pos*2+y_pos*4*Screen_width,line,width*2);
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
-  memcpy(Screen_pixels+x_pos*2+(y_pos*4+2)*Screen_width,line,width*2);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
 }
 
 void Display_line_on_screen_double(word x_pos,word y_pos,word width,byte * line)
@@ -306,11 +306,11 @@ void Display_line_on_screen_double(word x_pos,word y_pos,word width,byte * line)
 {
   int x;
   byte *dest;
-  dest=Screen_pixels+x_pos*2+y_pos*4*Screen_width;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
   for(x=width;x>0;x--)
   {
-    *(dest+Screen_width*2+1)=*(dest+Screen_width*2)=*(dest+1)=*dest=*line;
+    *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*line;
-    dest+=2;
+    dest+=ZOOMX;
     line++;
   }
 }
@@ -320,7 +320,7 @@ void Display_transparent_mono_line_on_screen_double(
 // Affiche une ligne à l'écran avec une couleur + transparence.
 // Utilisé par les brosses en mode zoom
 {
-  byte* dest = Screen_pixels+ y_pos*ZOOMX*Screen_width + x_pos*ZOOMX;
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -330,13 +330,13 @@ void Display_transparent_mono_line_on_screen_double(
       *(dest+1)=*dest=color;
     }
     line ++; // Pixel suivant
-    dest+=2;
+    dest+=ZOOMX;
   }
 }
 
 void Read_line_screen_double(word x_pos,word y_pos,word width,byte * line)
 {
-  memcpy(line,Screen_width * 4 * y_pos + x_pos * 2 + Screen_pixels,width*2);
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_double(
@@ -356,7 +356,7 @@ void Display_part_of_screen_scaled_double(
     // On éclate la ligne
     Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
     // On l'affiche Facteur fois, sur des lignes consécutives
-    x = Main_magnifier_factor/**ZOOMY*/;
+    x = Main_magnifier_factor;
     // Pour chaque ligne
     do{
       // On affiche la ligne zoomée
@@ -366,7 +366,7 @@ void Display_part_of_screen_scaled_double(
       );
       // On passe à la suivante
       y++;
-      if(y==height/**ZOOMY*/)
+      if(y==height)
       {
         Update_rect(Main_X_zoom,0,
           width*Main_magnifier_factor,height);
@@ -398,9 +398,8 @@ void Display_brush_color_zoom_double(word x_pos,word y_pos,
     // On affiche facteur fois la ligne zoomée
     for(bx=Main_magnifier_factor;bx>0;bx--)
     {
-      Display_transparent_line_on_screen_wide(x_pos,y*ZOOMX,width*Main_magnifier_factor,buffer,transp_color);
+      Display_transparent_line_on_screen_wide(x_pos,y*ZOOMY,width*Main_magnifier_factor,buffer,transp_color);
-      // TODO: pas clair ici
+      memcpy(Screen_pixels + (y*ZOOMY+1)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
-      memcpy(Screen_pixels + (y*ZOOMY+1)*ZOOMX*Screen_width + x_pos*ZOOMX, Screen_pixels + y*ZOOMX*ZOOMY*Screen_width + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
@@ -435,7 +434,7 @@ void Display_brush_mono_zoom_double(word x_pos, word y_pos,
 
     // On affiche la ligne Facteur fois à l'écran (sur des
     // lignes consécutives)
-    bx = Main_magnifier_factor*ZOOMX;
+    bx = Main_magnifier_factor*ZOOMY;
 
     // Pour chaque ligne écran
     do
@@ -448,7 +447,7 @@ void Display_brush_mono_zoom_double(word x_pos, word y_pos,
       // On passe à la ligne suivante
       y++;
       // On vérifie qu'on est pas à la ligne finale
-      if(y == end_y_pos*ZOOMX)
+      if(y == end_y_pos*ZOOMY)
       {
         Update_rect( x_pos, y_pos,
           width * Main_magnifier_factor, end_y_pos - y_pos );
@@ -473,13 +472,12 @@ void Clear_brush_scaled_double(word x_pos,word y_pos,word x_offset,word y_offset
 
   // Pour chaque ligne à zoomer
   while(1){
-    Zoom_a_line(src,buffer,Main_magnifier_factor*2,width);
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
 
     bx=Main_magnifier_factor;
 
     // Pour chaque ligne
     do{
-      // TODO a verifier
       Display_line_on_screen_fast_double(x_pos,y,
         width * Main_magnifier_factor,buffer);
 

pxquad.c

@@ -0,0 +1,534 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <SDL.h>
+#include "global.h"
+#include "sdlscreen.h"
+#include "misc.h"
+#include "pxquad.h"
+
+#define ZOOMX 4
+#define ZOOMY 4
+
+void Pixel_quad (word x,word y,byte color)
+/* Affiche un pixel de la color aux coords x;y à l'écran */
+{
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 3)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 3)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 3)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH + 3)=color;
+}
+
+byte Read_pixel_quad (word x,word y)
+/* On retourne la couleur du pixel aux coords données */
+{
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+}
+
+void Block_quad (word start_x,word start_y,word width,word height,byte color)
+/* On affiche un rectangle de la couleur donnée */
+{
+  SDL_Rect rectangle;
+  rectangle.x=start_x*ZOOMX;
+  rectangle.y=start_y*ZOOMY;
+  rectangle.w=width*ZOOMX;
+  rectangle.h=height*ZOOMY;
+  SDL_FillRect(Screen_SDL,&rectangle,color);
+}
+
+void Display_part_of_screen_quad (word width,word height,word image_width)
+/* Afficher une partie de l'image telle quelle sur l'écran */
+{
+  byte* dest=Screen_pixels; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src=Main_offset_Y*image_width+Main_offset_X+Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int dy;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    // On fait une copie de la ligne
+    for (dy=width;dy>0;dy--)
+    {
+      *(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+      src++;
+      dest+=ZOOMX;
+    }
+    // On double la ligne qu'on vient de copier
+    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    // On la triple
+    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    // On la quadruple
+    memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+  //Update_rect(0,0,width,height);
+}
+
+void Pixel_preview_normal_quad (word x,word y,byte color)
+/* Affichage d'un pixel dans l'écran, par rapport au décalage de l'image 
+ * dans l'écran, en mode normal (pas en mode loupe)
+ * Note: si on modifie cette procédure, il faudra penser à faire également 
+ * la modif dans la procédure Pixel_Preview_Loupe_SDL. */
+{
+//  if(x-Main_offset_X >= 0 && y - Main_offset_Y >= 0)
+  Pixel_quad(x-Main_offset_X,y-Main_offset_Y,color);
+}
+
+void Pixel_preview_magnifier_quad  (word x,word y,byte color)
+{
+  // Affiche le pixel dans la partie non zoomée
+  Pixel_quad(x-Main_offset_X,y-Main_offset_Y,color);
+  
+  // Regarde si on doit aussi l'afficher dans la partie zoomée
+  if (y >= Limit_top_zoom && y <= Limit_visible_bottom_zoom
+          && x >= Limit_left_zoom && x <= Limit_visible_right_zoom)
+  {
+    // On est dedans
+    int height;
+    int y_zoom = Zoom_factor_table[y-Main_magnifier_offset_Y];
+
+    if (Menu_Y - y_zoom < Main_magnifier_factor)
+      // On ne doit dessiner qu'un morceau du pixel
+      // sinon on dépasse sur le menu
+      height = Menu_Y - y_zoom;
+    else
+      height = Main_magnifier_factor;
+
+    Block_quad(
+      Zoom_factor_table[x-Main_magnifier_offset_X]+Main_X_zoom, 
+      y_zoom, Main_magnifier_factor, height, color
+      );
+  }
+}
+
+void Horizontal_XOR_line_quad(word x_pos,word y_pos,word width)
+{
+  //On calcule la valeur initiale de dest:
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+
+  int x;
+
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
+    *(dest+x+3*VIDEO_LINE_WIDTH+3)=*(dest+x+3*VIDEO_LINE_WIDTH+2)=*(dest+x+3*VIDEO_LINE_WIDTH+1)=*(dest+x+3*VIDEO_LINE_WIDTH)=*(dest+x+2*VIDEO_LINE_WIDTH+3)=*(dest+x+2*VIDEO_LINE_WIDTH+2)=*(dest+x+2*VIDEO_LINE_WIDTH+1)=*(dest+x+2*VIDEO_LINE_WIDTH)=*(dest+x+VIDEO_LINE_WIDTH+3)=*(dest+x+VIDEO_LINE_WIDTH+2)=*(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+3)=*(dest+x+2)=*(dest+x+1)=*(dest+x)=~*(dest+x);
+}
+
+void Vertical_XOR_line_quad(word x_pos,word y_pos,word height)
+{
+  int i;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=height;i>0;i--)
+  {
+    *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*(dest)=~*(dest);
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+  }
+}
+
+void Display_brush_color_quad(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = Brush + y_offset * brush_width + x_offset;
+
+  word x,y;
+
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+3*VIDEO_LINE_WIDTH+3) = *(dest+3*VIDEO_LINE_WIDTH+2) = *(dest+3*VIDEO_LINE_WIDTH+1) = *(dest+3*VIDEO_LINE_WIDTH) = *(dest+2*VIDEO_LINE_WIDTH+3) = *(dest+2*VIDEO_LINE_WIDTH+2) = *(dest+2*VIDEO_LINE_WIDTH+1) = *(dest+2*VIDEO_LINE_WIDTH) = *(dest+VIDEO_LINE_WIDTH+3) = *(dest+VIDEO_LINE_WIDTH+2) = *(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
+      }
+
+      // Pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_brush_mono_quad(word x_pos, word y_pos,
+        word x_offset, word y_offset, word width, word height,
+        byte transp_color, byte color, word brush_width)
+/* On affiche la brosse en monochrome */
+{
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
+      // l'écran
+  byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
+      // la brosse
+  int x,y;
+
+  for(y=height;y!=0;y--)
+  //Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      if (*src!=transp_color)
+        *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=color;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=brush_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Clear_brush_quad(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
+{
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int x;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+// Affiche une brosse (arbitraire) à l'écran
+void Display_brush_quad(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = brush + y_offset * brush_width + x_offset;
+  
+  word x,y;
+  
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+      }
+
+      // Pixel suivant
+      src++; dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+}
+
+void Remap_screen_quad(word x_pos,word y_pos,word width,word height,byte * conversion_table)
+{
+  // dest = coords a l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  int x,y;
+
+  // Pour chaque ligne
+  for(y=height;y>0;y--)
+  {
+    // Pour chaque pixel
+    for(x=width;x>0;x--)
+    {
+        *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=
+        conversion_table[*dest];
+      dest +=ZOOMX;
+    }
+
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_line_on_screen_fast_quad(word x_pos,word y_pos,word width,byte * line)
+/* On affiche toute une ligne de pixels telle quelle. */
+/* Utilisée si le buffer contient déja des pixel doublés. */
+{
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+2)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+3)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+}
+
+void Display_line_on_screen_quad(word x_pos,word y_pos,word width,byte * line)
+/* On affiche une ligne de pixels en les doublant. */
+{
+  int x;
+  byte *dest;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  for(x=width;x>0;x--)
+  {
+    *(dest+3*VIDEO_LINE_WIDTH+3)=*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+3)=*(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*line;
+    dest+=ZOOMX;
+    line++;
+  }
+}
+void Display_transparent_mono_line_on_screen_quad(
+        word x_pos, word y_pos, word width, byte* line, 
+        byte transp_color, byte color)
+// Affiche une ligne à l'écran avec une couleur + transparence.
+// Utilisé par les brosses en mode zoom
+{
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  int x;
+  // Pour chaque pixel
+  for(x=0;x<width;x++)
+  {
+    if (transp_color!=*line)
+    {
+      *(dest+3)=*(dest+2)=*(dest+1)=*dest=color;
+    }
+    line ++; // Pixel suivant
+    dest+=ZOOMX;
+  }
+}
+
+void Read_line_screen_quad(word x_pos,word y_pos,word width,byte * line)
+{
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+}
+
+void Display_part_of_screen_scaled_quad(
+        word width, // width non zoomée
+        word height, // height zoomée
+        word image_width,byte * buffer)
+{
+  byte* src = Main_screen + Main_magnifier_offset_Y * image_width 
+                      + Main_magnifier_offset_X;
+  int y = 0; // Ligne en cours de traitement
+
+  // Pour chaque ligne à zoomer
+  while(1)
+  {
+    int x;
+    
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+    // On l'affiche Facteur fois, sur des lignes consécutives
+    x = Main_magnifier_factor/**ZOOMY*/;
+    // Pour chaque ligne
+    do{
+      // On affiche la ligne zoomée
+      Display_line_on_screen_fast_quad(
+        Main_X_zoom, y, width*Main_magnifier_factor,
+        buffer
+      );
+      // On passe à la suivante
+      y++;
+      if(y==height/**ZOOMY*/)
+      {
+        Update_rect(Main_X_zoom,0,
+          width*Main_magnifier_factor,height);
+        return;
+      }
+      x--;
+    }while (x > 0);
+    src += image_width;
+  }
+// ATTENTION on n'arrive jamais ici !
+}
+
+// Affiche une partie de la brosse couleur zoomée
+void Display_brush_color_zoom_quad(word x_pos,word y_pos,
+        word x_offset,word y_offset,
+        word width, // width non zoomée
+        word end_y_pos,byte transp_color,
+        word brush_width, // width réelle de la brosse
+        byte * buffer)
+{
+  byte* src = Brush+y_offset*brush_width + x_offset;
+  word y = y_pos;
+  byte bx;
+
+  // Pour chaque ligne
+  while(1)
+  {
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+    // On affiche facteur fois la ligne zoomée
+    for(bx=Main_magnifier_factor;bx>0;bx--)
+    {
+      byte* line_src = buffer;
+      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      word x;
+      // Pour chaque pixel de la ligne
+      for(x = width*Main_magnifier_factor;x > 0;x--)
+      {
+        if(*line_src!=transp_color)
+        {
+          *(dest+3)=*(dest+2)=*(dest+1)=*dest = *line_src;
+        }
+        line_src++;
+        dest+=ZOOMX;
+      }
+      // Double the line
+      memcpy(Screen_pixels + (y*ZOOMY+1)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      // Triple the line
+      memcpy(Screen_pixels + (y*ZOOMY+2)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      // Quadruple it
+      memcpy(Screen_pixels + (y*ZOOMY+3)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      y++;
+      if(y==end_y_pos)
+      {
+        return;
+      }
+    }
+    src += brush_width;
+  }
+  // ATTENTION zone jamais atteinte
+}
+
+void Display_brush_mono_zoom_quad(word x_pos, word y_pos,
+        word x_offset, word y_offset, 
+        word width, // width non zoomée 
+        word end_y_pos,
+        byte transp_color, byte color, 
+        word brush_width, // width réelle de la brosse
+        byte * buffer
+)
+
+{
+  byte* src = Brush + y_offset * brush_width + x_offset;
+  int y=y_pos*ZOOMY;
+
+  //Pour chaque ligne à zoomer :
+  while(1)
+  {
+    int bx;
+    // src = Ligne originale
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+
+    // On affiche la ligne Facteur fois à l'écran (sur des
+    // lignes consécutives)
+    bx = Main_magnifier_factor*ZOOMY;
+
+    // Pour chaque ligne écran
+    do
+    {
+      // On affiche la ligne zoomée
+      Display_transparent_mono_line_on_screen_quad(
+        x_pos, y, width * Main_magnifier_factor, 
+        buffer, transp_color, color
+      );
+      // On passe à la ligne suivante
+      y++;
+      // On vérifie qu'on est pas à la ligne finale
+      if(y == end_y_pos*ZOOMY)
+      {
+        Update_rect( x_pos, y_pos,
+          width * Main_magnifier_factor, end_y_pos - y_pos );
+        return;
+      }
+      bx --;
+    }
+    while (bx > 0);
+    
+    // Passage à la ligne suivante dans la brosse aussi
+    src+=brush_width;
+  }
+}
+
+void Clear_brush_scaled_quad(word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,__attribute__((unused)) byte transp_color,word image_width,byte * buffer)
+{
+
+  // En fait on va recopier l'image non zoomée dans la partie zoomée !
+  byte* src = Main_screen + y_offset * image_width + x_offset;
+  int y = y_pos;
+  int bx;
+
+  // Pour chaque ligne à zoomer
+  while(1){
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+
+    bx=Main_magnifier_factor;
+
+    // Pour chaque ligne
+    do{
+      // TODO a verifier
+      Display_line_on_screen_fast_quad(x_pos,y,
+        width * Main_magnifier_factor,buffer);
+
+      // Ligne suivante
+      y++;
+      if(y==end_y_pos)
+      {
+        Update_rect(x_pos,y_pos,
+          width*Main_magnifier_factor,end_y_pos-y_pos);
+        return;
+      }
+      bx--;
+    }while(bx!=0);
+
+    src+= image_width;
+  }
+}
+
+

pxquad.h

@@ -0,0 +1,50 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+//////////////////////////////////////////////////////////////////////////////
+///@file pxquad.h
+/// Renderer for quadruple pixels (4x4).
+//////////////////////////////////////////////////////////////////////////////
+
+#include "struct.h"
+
+  void Pixel_quad                      (word x,word y,byte color);
+  byte Read_pixel_quad                  (word x,word y);
+  void Block_quad                      (word start_x,word start_y,word width,word height,byte color);
+  void Pixel_preview_normal_quad       (word x,word y,byte color);
+  void Pixel_preview_magnifier_quad        (word x,word y,byte color);
+  void Horizontal_XOR_line_quad      (word x_pos,word y_pos,word width);
+  void Vertical_XOR_line_quad        (word x_pos,word y_pos,word height);
+  void Display_brush_color_quad        (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+  void Display_brush_mono_quad         (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,byte color,word brush_width);
+  void Clear_brush_quad                (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width);
+  void Remap_screen_quad               (word x_pos,word y_pos,word width,word height,byte * conversion_table);
+  void Display_part_of_screen_quad (word width,word height,word image_width);
+  void Display_line_on_screen_quad   (word x_pos,word y_pos,word width,byte * line);
+  void Read_line_screen_quad       (word x_pos,word y_pos,word width,byte * line);
+  void Display_part_of_screen_scaled_quad(word width,word height,word image_width,byte * buffer);
+  void Display_brush_color_zoom_quad   (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word brush_width,byte * buffer);
+  void Display_brush_mono_zoom_quad    (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,byte color,word brush_width,byte * buffer);
+  void Clear_brush_scaled_quad           (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word image_width,byte * buffer);
+  void Display_brush_quad             (byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+
+  void Display_line_on_screen_fast_quad   (word x_pos,word y_pos,word width,byte * line);

pxsimple.c

@@ -32,13 +32,13 @@
 void Pixel_simple (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
-  *(Screen_pixels + x + y * Screen_width)=color;
+  *(Screen_pixels + x + y * VIDEO_LINE_WIDTH)=color;
 }
 
 byte Read_pixel_simple (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * Screen_width + x );
+  return *( Screen_pixels + y * VIDEO_LINE_WIDTH + x );
 }
 
 void Block_simple (word start_x,word start_y,word width,word height,byte color)
@@ -67,7 +67,7 @@ void Display_part_of_screen_simple (word width,word height,word image_width)
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
   }
   //Update_rect(0,0,width,height);
 }
@@ -112,7 +112,7 @@ void Pixel_preview_magnifier_simple  (word x,word y,byte color)
 void Horizontal_XOR_line_simple(word x_pos,word y_pos,word width)
 {
   //On calcule la valeur initiale de dest:
-  byte* dest=y_pos*Screen_width+x_pos+Screen_pixels;
+  byte* dest=y_pos*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
 
   int x;
 
@@ -126,15 +126,15 @@ void Vertical_XOR_line_simple(word x_pos,word y_pos,word height)
   byte color;
   for (i=y_pos;i<y_pos+height;i++)
   {
-    color=*(Screen_pixels+x_pos+i*Screen_width);
+    color=*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH);
-    *(Screen_pixels+x_pos+i*Screen_width)=~color;
+    *(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=~color;
   }
 }
 
 void Display_brush_color_simple(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos * VIDEO_LINE_WIDTH + x_pos;
   // src = Position dans la brosse
   byte* src = Brush + y_offset * brush_width + x_offset;
 
@@ -157,7 +157,7 @@ void Display_brush_color_simple(word x_pos,word y_pos,word x_offset,word y_offse
     }
 
     // On passe à la ligne suivante
-    dest = dest + Screen_width - width;
+    dest = dest + VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -168,7 +168,7 @@ void Display_brush_mono_simple(word x_pos, word y_pos,
         byte transp_color, byte color, word brush_width)
 /* On affiche la brosse en monochrome */
 {
-  byte* dest=y_pos*Screen_width+x_pos+Screen_pixels; // dest = adr Destination à 
+  byte* dest=y_pos*VIDEO_LINE_WIDTH+x_pos+Screen_pixels; // dest = adr Destination à 
       // l'écran
   byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
       // la brosse
@@ -190,14 +190,14 @@ void Display_brush_mono_simple(word x_pos, word y_pos,
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=Screen_width-width;
+    dest+=VIDEO_LINE_WIDTH-width;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
 
 void Clear_brush_simple(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos+y_pos*Screen_width; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* dest=Screen_pixels+x_pos+y_pos*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
   byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
   int y;
 
@@ -209,7 +209,7 @@ void Clear_brush_simple(word x_pos,word y_pos,__attribute__((unused)) word x_off
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -218,7 +218,7 @@ void Clear_brush_simple(word x_pos,word y_pos,__attribute__((unused)) word x_off
 void Display_brush_simple(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos * VIDEO_LINE_WIDTH + x_pos;
   // src = Position dans la brosse
   byte* src = brush + y_offset * brush_width + x_offset;
   
@@ -241,7 +241,7 @@ void Display_brush_simple(byte * brush, word x_pos,word y_pos,word x_offset,word
     }
 
     // On passe à la ligne suivante
-    dest = dest + Screen_width - width;
+    dest = dest + VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
 }
@@ -249,7 +249,7 @@ void Display_brush_simple(byte * brush, word x_pos,word y_pos,word x_offset,word
 void Remap_screen_simple(word x_pos,word y_pos,word width,word height,byte * conversion_table)
 {
   // dest = coords a l'écran
-  byte* dest = Screen_pixels + y_pos * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos * VIDEO_LINE_WIDTH + x_pos;
   int x,y;
 
   // Pour chaque ligne
@@ -262,7 +262,7 @@ void Remap_screen_simple(word x_pos,word y_pos,word width,word height,byte * con
       dest ++;
     }
 
-    dest = dest + Screen_width - width;
+    dest = dest + VIDEO_LINE_WIDTH - width;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -271,7 +271,7 @@ void Remap_screen_simple(word x_pos,word y_pos,word width,word height,byte * con
 void Display_line_on_screen_simple(word x_pos,word y_pos,word width,byte * line)
 /* On affiche toute une ligne de pixels. Utilisé pour les textes. */
 {
-  memcpy(Screen_pixels+x_pos+y_pos*Screen_width,line,width);
+  memcpy(Screen_pixels+x_pos+y_pos*VIDEO_LINE_WIDTH,line,width);
 }
 
 void Display_transparent_mono_line_on_screen_simple(
@@ -280,7 +280,7 @@ void Display_transparent_mono_line_on_screen_simple(
 // Affiche une ligne à l'écran avec une couleur + transparence.
 // Utilisé par les brosses en mode zoom
 {
-  byte* dest = Screen_pixels+ y_pos * Screen_width + x_pos;
+  byte* dest = Screen_pixels+ y_pos * VIDEO_LINE_WIDTH + x_pos;
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -294,7 +294,7 @@ void Display_transparent_mono_line_on_screen_simple(
 
 void Read_line_screen_simple(word x_pos,word y_pos,word width,byte * line)
 {
-  memcpy(line,Screen_width * y_pos + x_pos + Screen_pixels,width);
+  memcpy(line,VIDEO_LINE_WIDTH * y_pos + x_pos + Screen_pixels,width);
 }
 
 void Display_part_of_screen_scaled_simple(
@@ -340,7 +340,7 @@ void Display_part_of_screen_scaled_simple(
 void Display_transparent_line_on_screen_simple(word x_pos,word y_pos,word width,byte* line,byte transp_color)
 {
   byte* src = line;
-  byte* dest = Screen_pixels + y_pos * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos * VIDEO_LINE_WIDTH + x_pos;
 
   word x;
 

pxtall.c

@@ -30,17 +30,20 @@
 #include "pxtall.h"
 #include "pxsimple.h"
 
+#define ZOOMX 1
+#define ZOOMY 2
+
 void Pixel_tall (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
-  *(Screen_pixels + x + y * 2 * Screen_width)=color;
+  *(Screen_pixels + x + y*ZOOMY*VIDEO_LINE_WIDTH)=color;
-  *(Screen_pixels + x + (y * 2 + 1) * Screen_width)=color;
+  *(Screen_pixels + x + (y*ZOOMY+1)*VIDEO_LINE_WIDTH)=color;
 }
 
 byte Read_pixel_tall (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * 2 * Screen_width + x );
+  return *( Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x );
 }
 
 void Block_tall (word start_x,word start_y,word width,word height,byte color)
@@ -48,9 +51,9 @@ void Block_tall (word start_x,word start_y,word width,word height,byte color)
 {
   SDL_Rect rectangle;
   rectangle.x=start_x;
-  rectangle.y=start_y*2;
+  rectangle.y=start_y*ZOOMY;
   rectangle.w=width;
-  rectangle.h=height*2;
+  rectangle.h=height*ZOOMY;
   SDL_FillRect(Screen_SDL,&rectangle,color);
 }
 
@@ -66,12 +69,12 @@ void Display_part_of_screen_tall (word width,word height,word image_width)
   {
     // On fait une copie de la ligne
     memcpy(dest,src,width);
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
     memcpy(dest,src,width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
   }
   //Update_rect(0,0,width,height);
 }
@@ -116,14 +119,14 @@ void Pixel_preview_magnifier_tall  (word x,word y,byte color)
 void Horizontal_XOR_line_tall(word x_pos,word y_pos,word width)
 {
   //On calcule la valeur initiale de dest:
-  byte* dest=y_pos*2*Screen_width+x_pos+Screen_pixels;
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
 
   int x;
 
   for (x=0;x<width;x++)
     *(dest+x)=~*(dest+x);
 
-  dest=(y_pos*2+1)*Screen_width+x_pos+Screen_pixels;
+  dest=(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
   for (x=0;x<width;x++)
     *(dest+x)=~*(dest+x);
 }
@@ -132,17 +135,17 @@ void Vertical_XOR_line_tall(word x_pos,word y_pos,word height)
 {
   int i;
   byte color;
-  for (i=y_pos*2;i<(y_pos+height)*2;i++)
+  for (i=y_pos*ZOOMY;i<(y_pos+height)*ZOOMY;i++)
   {
-    color=*(Screen_pixels+x_pos+i*Screen_width);
+    color=*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH);
-    *(Screen_pixels+x_pos+i*Screen_width)=~color;
+    *(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=~color;
   }
 }
 
 void Display_brush_color_tall(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   // src = Position dans la brosse
   byte* src = Brush + y_offset * brush_width + x_offset;
 
@@ -158,7 +161,7 @@ void Display_brush_color_tall(word x_pos,word y_pos,word x_offset,word y_offset,
       if(*src != transp_color)
       {
         *dest = *src;
-        *(dest+Screen_width) = *src;
+        *(dest+VIDEO_LINE_WIDTH) = *src;
       }
 
       // Pixel suivant
@@ -166,7 +169,7 @@ void Display_brush_color_tall(word x_pos,word y_pos,word x_offset,word y_offset,
     }
 
     // On passe à la ligne suivante
-    dest = dest + 2 * Screen_width - width;
+    dest = dest + ZOOMY*VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -177,7 +180,7 @@ void Display_brush_mono_tall(word x_pos, word y_pos,
         byte transp_color, byte color, word brush_width)
 /* On affiche la brosse en monochrome */
 {
-  byte* dest=y_pos*2*Screen_width+x_pos+Screen_pixels; // dest = adr Destination à 
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos+Screen_pixels; // dest = adr Destination à 
       // l'écran
   byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
       // la brosse
@@ -192,7 +195,7 @@ void Display_brush_mono_tall(word x_pos, word y_pos,
       if (*src!=transp_color)
       {
         *dest=color;
-        *(dest+Screen_width)=color;
+        *(dest+VIDEO_LINE_WIDTH)=color;
       }
 
       // On passe au pixel suivant
@@ -202,14 +205,14 @@ void Display_brush_mono_tall(word x_pos, word y_pos,
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=2*Screen_width-width;
+    dest+=ZOOMY*VIDEO_LINE_WIDTH-width;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
 
 void Clear_brush_tall(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos+y_pos*2*Screen_width; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* dest=Screen_pixels+x_pos+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
   byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
   int y;
 
@@ -218,12 +221,12 @@ void Clear_brush_tall(word x_pos,word y_pos,__attribute__((unused)) word x_offse
   {
     // On fait une copie de la ligne
     memcpy(dest,src,width);
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
     memcpy(dest,src,width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=Screen_width;
+    dest+=VIDEO_LINE_WIDTH;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -232,7 +235,7 @@ void Clear_brush_tall(word x_pos,word y_pos,__attribute__((unused)) word x_offse
 void Display_brush_tall(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   // src = Position dans la brosse
   byte* src = brush + y_offset * brush_width + x_offset;
   
@@ -248,7 +251,7 @@ void Display_brush_tall(byte * brush, word x_pos,word y_pos,word x_offset,word y
       if(*src != transp_color)
       {
         *dest = *src;
-        *(dest+Screen_width) = *src;
+        *(dest+VIDEO_LINE_WIDTH) = *src;
       }
 
       // Pixel suivant
@@ -256,7 +259,7 @@ void Display_brush_tall(byte * brush, word x_pos,word y_pos,word x_offset,word y
     }
 
     // On passe à la ligne suivante
-    dest = dest + Screen_width * 2 - width;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width;
     src = src + brush_width - width;
   }
 }
@@ -264,11 +267,11 @@ void Display_brush_tall(byte * brush, word x_pos,word y_pos,word x_offset,word y
 void Remap_screen_tall(word x_pos,word y_pos,word width,word height,byte * conversion_table)
 {
   // dest = coords a l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos;
+  byte* dest = Screen_pixels + y_pos*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   int x,y;
 
   // Pour chaque ligne
-  for(y=height*2;y>0;y--)
+  for(y=height*ZOOMY;y>0;y--)
   {
     // Pour chaque pixel
     for(x=width;x>0;x--)
@@ -277,7 +280,7 @@ void Remap_screen_tall(word x_pos,word y_pos,word width,word height,byte * conve
       dest ++;
     }
 
-    dest = dest + Screen_width - width;
+    dest = dest + VIDEO_LINE_WIDTH - width;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -286,13 +289,13 @@ void Remap_screen_tall(word x_pos,word y_pos,word width,word height,byte * conve
 void Display_line_on_screen_tall(word x_pos,word y_pos,word width,byte * line)
 /* On affiche toute une ligne de pixels. Utilisé pour les textes. */
 {
-  memcpy(Screen_pixels+x_pos+y_pos*2*Screen_width,line,width);
+  memcpy(Screen_pixels+x_pos+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width);
-  memcpy(Screen_pixels+x_pos+(y_pos*2+1)*Screen_width,line,width);
+  memcpy(Screen_pixels+x_pos+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width);
 }
 
 void Read_line_screen_tall(word x_pos,word y_pos,word width,byte * line)
 {
-  memcpy(line,Screen_width * 2 * y_pos + x_pos + Screen_pixels,width);
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY*y_pos + x_pos + Screen_pixels,width);
 }
 
 void Display_part_of_screen_scaled_tall(
@@ -312,7 +315,7 @@ void Display_part_of_screen_scaled_tall(
     // On éclate la ligne
     Zoom_a_line(src,buffer,Main_magnifier_factor,width);
     // On l'affiche Facteur fois, sur des lignes consécutives
-    x = Main_magnifier_factor*2;
+    x = Main_magnifier_factor*ZOOMY;
     // Pour chaque ligne
     do{
       // On affiche la ligne zoomée
@@ -322,7 +325,7 @@ void Display_part_of_screen_scaled_tall(
       );
       // On passe à la suivante
       y++;
-      if(y==height*2)
+      if(y==height*ZOOMY)
       {
         Update_rect(Main_X_zoom,0,
           width*Main_magnifier_factor,height);
@@ -354,8 +357,8 @@ void Display_brush_color_zoom_tall(word x_pos,word y_pos,
     // On affiche facteur fois la ligne zoomée
     for(bx=Main_magnifier_factor;bx>0;bx--)
     {
-      Display_transparent_line_on_screen_simple(x_pos,y*2,width*Main_magnifier_factor,buffer,transp_color);
+      Display_transparent_line_on_screen_simple(x_pos,y*ZOOMY,width*Main_magnifier_factor,buffer,transp_color);
-      memcpy(Screen_pixels + (y*2 +1) * Screen_width + x_pos, Screen_pixels + y*2* Screen_width + x_pos, width*Main_magnifier_factor);
+      memcpy(Screen_pixels + (y*ZOOMY +1) * VIDEO_LINE_WIDTH + x_pos, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos, width*Main_magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
@@ -378,7 +381,7 @@ void Display_brush_mono_zoom_tall(word x_pos, word y_pos,
 
 {
   byte* src = Brush + y_offset * brush_width + x_offset;
-  int y=y_pos*2;
+  int y=y_pos*ZOOMY;
 
   //Pour chaque ligne à zoomer :
   while(1)
@@ -390,7 +393,7 @@ void Display_brush_mono_zoom_tall(word x_pos, word y_pos,
 
     // On affiche la ligne Facteur fois à l'écran (sur des
     // lignes consécutives)
-    bx = Main_magnifier_factor*2;
+    bx = Main_magnifier_factor*ZOOMY;
 
     // Pour chaque ligne écran
     do
@@ -403,7 +406,7 @@ void Display_brush_mono_zoom_tall(word x_pos, word y_pos,
       // On passe à la ligne suivante
       y++;
       // On vérifie qu'on est pas à la ligne finale
-      if(y == end_y_pos*2)
+      if(y == end_y_pos*ZOOMY)
       {
         Update_rect( x_pos, y_pos,
           width * Main_magnifier_factor, end_y_pos - y_pos );

pxtall2.c

@@ -0,0 +1,526 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <SDL.h>
+#include "global.h"
+#include "sdlscreen.h"
+#include "misc.h"
+#include "pxtall2.h"
+
+#define ZOOMX 2
+#define ZOOMY 4
+
+void Pixel_tall2 (word x,word y,byte color)
+/* Affiche un pixel de la color aux coords x;y à l'écran */
+{
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+3) * VIDEO_LINE_WIDTH + 1)=color;
+}
+
+byte Read_pixel_tall2 (word x,word y)
+/* On retourne la couleur du pixel aux coords données */
+{
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+}
+
+void Block_tall2 (word start_x,word start_y,word width,word height,byte color)
+/* On affiche un rectangle de la couleur donnée */
+{
+  SDL_Rect rectangle;
+  rectangle.x=start_x*ZOOMX;
+  rectangle.y=start_y*ZOOMY;
+  rectangle.w=width*ZOOMX;
+  rectangle.h=height*ZOOMY;
+  SDL_FillRect(Screen_SDL,&rectangle,color);
+}
+
+void Display_part_of_screen_tall2 (word width,word height,word image_width)
+/* Afficher une partie de l'image telle quelle sur l'écran */
+{
+  byte* dest=Screen_pixels; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src=Main_offset_Y*image_width+Main_offset_X+Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int dy;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    // On fait une copie de la ligne
+    for (dy=width;dy>0;dy--)
+    {
+      *(dest+1)=*dest=*src;
+      src++;
+      dest+=ZOOMX;
+    }
+    // On double la ligne qu'on vient de copier
+    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    // On la triple
+    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    // On la quadruple
+    memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+  //Update_rect(0,0,width,height);
+}
+
+void Pixel_preview_normal_tall2 (word x,word y,byte color)
+/* Affichage d'un pixel dans l'écran, par rapport au décalage de l'image 
+ * dans l'écran, en mode normal (pas en mode loupe)
+ * Note: si on modifie cette procédure, il faudra penser à faire également 
+ * la modif dans la procédure Pixel_Preview_Loupe_SDL. */
+{
+//  if(x-Main_offset_X >= 0 && y - Main_offset_Y >= 0)
+  Pixel_tall2(x-Main_offset_X,y-Main_offset_Y,color);
+}
+
+void Pixel_preview_magnifier_tall2  (word x,word y,byte color)
+{
+  // Affiche le pixel dans la partie non zoomée
+  Pixel_tall2(x-Main_offset_X,y-Main_offset_Y,color);
+  
+  // Regarde si on doit aussi l'afficher dans la partie zoomée
+  if (y >= Limit_top_zoom && y <= Limit_visible_bottom_zoom
+          && x >= Limit_left_zoom && x <= Limit_visible_right_zoom)
+  {
+    // On est dedans
+    int height;
+    int y_zoom = Zoom_factor_table[y-Main_magnifier_offset_Y];
+
+    if (Menu_Y - y_zoom < Main_magnifier_factor)
+      // On ne doit dessiner qu'un morceau du pixel
+      // sinon on dépasse sur le menu
+      height = Menu_Y - y_zoom;
+    else
+      height = Main_magnifier_factor;
+
+    Block_tall2(
+      Zoom_factor_table[x-Main_magnifier_offset_X]+Main_X_zoom, 
+      y_zoom, Main_magnifier_factor, height, color
+      );
+  }
+}
+
+void Horizontal_XOR_line_tall2(word x_pos,word y_pos,word width)
+{
+  //On calcule la valeur initiale de dest:
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+
+  int x;
+
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
+    *(dest+x+3*VIDEO_LINE_WIDTH+1)=*(dest+x+3*VIDEO_LINE_WIDTH)=*(dest+x+2*VIDEO_LINE_WIDTH+1)=*(dest+x+2*VIDEO_LINE_WIDTH)=*(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+1)=*(dest+x)=~*(dest+x);
+}
+
+void Vertical_XOR_line_tall2(word x_pos,word y_pos,word height)
+{
+  int i;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=height;i>0;i--)
+  {
+    *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=~*(dest);
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+  }
+}
+
+void Display_brush_color_tall2(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = Brush + y_offset * brush_width + x_offset;
+
+  word x,y;
+
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+3*VIDEO_LINE_WIDTH+1) = *(dest+3*VIDEO_LINE_WIDTH) = *(dest+2*VIDEO_LINE_WIDTH+1) = *(dest+2*VIDEO_LINE_WIDTH) = *(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+1) = *dest = *src;
+      }
+
+      // Pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_brush_mono_tall2(word x_pos, word y_pos,
+        word x_offset, word y_offset, word width, word height,
+        byte transp_color, byte color, word brush_width)
+/* On affiche la brosse en monochrome */
+{
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
+      // l'écran
+  byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
+      // la brosse
+  int x,y;
+
+  for(y=height;y!=0;y--)
+  //Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      if (*src!=transp_color)
+        *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=color;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=brush_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Clear_brush_tall2(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
+{
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int x;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=*src;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+// Affiche une brosse (arbitraire) à l'écran
+void Display_brush_tall2(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = brush + y_offset * brush_width + x_offset;
+  
+  word x,y;
+  
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=*src;
+      }
+
+      // Pixel suivant
+      src++; dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+}
+
+void Remap_screen_tall2(word x_pos,word y_pos,word width,word height,byte * conversion_table)
+{
+  // dest = coords a l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  int x,y;
+
+  // Pour chaque ligne
+  for(y=height;y>0;y--)
+  {
+    // Pour chaque pixel
+    for(x=width;x>0;x--)
+    {
+        *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=
+        conversion_table[*dest];
+      dest +=ZOOMX;
+    }
+
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_line_on_screen_fast_tall2(word x_pos,word y_pos,word width,byte * line)
+/* On affiche toute une ligne de pixels telle quelle. */
+/* Utilisée si le buffer contient déja des pixel doublés. */
+{
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+2)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+3)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+}
+
+void Display_line_on_screen_tall2(word x_pos,word y_pos,word width,byte * line)
+/* On affiche une ligne de pixels en les doublant. */
+{
+  int x;
+  byte *dest;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  for(x=width;x>0;x--)
+  {
+    *(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*(dest)=*line;
+    dest+=ZOOMX;
+    line++;
+  }
+}
+void Display_transparent_mono_line_on_screen_tall2(
+        word x_pos, word y_pos, word width, byte* line, 
+        byte transp_color, byte color)
+// Affiche une ligne à l'écran avec une couleur + transparence.
+// Utilisé par les brosses en mode zoom
+{
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  int x;
+  // Pour chaque pixel
+  for(x=0;x<width;x++)
+  {
+    if (transp_color!=*line)
+    {
+      *(dest+1)=*dest=color;
+    }
+    line ++; // Pixel suivant
+    dest+=ZOOMX;
+  }
+}
+
+void Read_line_screen_tall2(word x_pos,word y_pos,word width,byte * line)
+{
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+}
+
+void Display_part_of_screen_scaled_tall2(
+        word width, // width non zoomée
+        word height, // height zoomée
+        word image_width,byte * buffer)
+{
+  byte* src = Main_screen + Main_magnifier_offset_Y * image_width 
+                      + Main_magnifier_offset_X;
+  int y = 0; // Ligne en cours de traitement
+
+  // Pour chaque ligne à zoomer
+  while(1)
+  {
+    int x;
+    
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+    // On l'affiche Facteur fois, sur des lignes consécutives
+    x = Main_magnifier_factor/**ZOOMY*/;
+    // Pour chaque ligne
+    do{
+      // On affiche la ligne zoomée
+      Display_line_on_screen_fast_tall2(
+        Main_X_zoom, y, width*Main_magnifier_factor,
+        buffer
+      );
+      // On passe à la suivante
+      y++;
+      if(y==height/**ZOOMY*/)
+      {
+        Update_rect(Main_X_zoom,0,
+          width*Main_magnifier_factor,height);
+        return;
+      }
+      x--;
+    }while (x > 0);
+    src += image_width;
+  }
+// ATTENTION on n'arrive jamais ici !
+}
+
+// Affiche une partie de la brosse couleur zoomée
+void Display_brush_color_zoom_tall2(word x_pos,word y_pos,
+        word x_offset,word y_offset,
+        word width, // width non zoomée
+        word end_y_pos,byte transp_color,
+        word brush_width, // width réelle de la brosse
+        byte * buffer)
+{
+  byte* src = Brush+y_offset*brush_width + x_offset;
+  word y = y_pos;
+  byte bx;
+
+  // Pour chaque ligne
+  while(1)
+  {
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+    // On affiche facteur fois la ligne zoomée
+    for(bx=Main_magnifier_factor;bx>0;bx--)
+    {
+      byte* line_src = buffer;
+      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      word x;
+      // Pour chaque pixel de la ligne
+      for(x = width*Main_magnifier_factor;x > 0;x--)
+      {
+        if(*line_src!=transp_color)
+        {
+          *(dest+1)=*dest = *line_src;
+        }
+        line_src++;
+        dest+=ZOOMX;
+      }
+      // Double the line
+      memcpy(Screen_pixels + (y*ZOOMY+1)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      // Triple the line
+      memcpy(Screen_pixels + (y*ZOOMY+2)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      // Quadruple it
+      memcpy(Screen_pixels + (y*ZOOMY+3)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      y++;
+      if(y==end_y_pos)
+      {
+        return;
+      }
+    }
+    src += brush_width;
+  }
+  // ATTENTION zone jamais atteinte
+}
+
+void Display_brush_mono_zoom_tall2(word x_pos, word y_pos,
+        word x_offset, word y_offset, 
+        word width, // width non zoomée 
+        word end_y_pos,
+        byte transp_color, byte color, 
+        word brush_width, // width réelle de la brosse
+        byte * buffer
+)
+
+{
+  byte* src = Brush + y_offset * brush_width + x_offset;
+  int y=y_pos*ZOOMY;
+
+  //Pour chaque ligne à zoomer :
+  while(1)
+  {
+    int bx;
+    // src = Ligne originale
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+
+    // On affiche la ligne Facteur fois à l'écran (sur des
+    // lignes consécutives)
+    bx = Main_magnifier_factor*ZOOMY;
+
+    // Pour chaque ligne écran
+    do
+    {
+      // On affiche la ligne zoomée
+      Display_transparent_mono_line_on_screen_tall2(
+        x_pos, y, width * Main_magnifier_factor, 
+        buffer, transp_color, color
+      );
+      // On passe à la ligne suivante
+      y++;
+      // On vérifie qu'on est pas à la ligne finale
+      if(y == end_y_pos*ZOOMY)
+      {
+        Update_rect( x_pos, y_pos,
+          width * Main_magnifier_factor, end_y_pos - y_pos );
+        return;
+      }
+      bx --;
+    }
+    while (bx > 0);
+    
+    // Passage à la ligne suivante dans la brosse aussi
+    src+=brush_width;
+  }
+}
+
+void Clear_brush_scaled_tall2(word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,__attribute__((unused)) byte transp_color,word image_width,byte * buffer)
+{
+
+  // En fait on va recopier l'image non zoomée dans la partie zoomée !
+  byte* src = Main_screen + y_offset * image_width + x_offset;
+  int y = y_pos;
+  int bx;
+
+  // Pour chaque ligne à zoomer
+  while(1){
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+
+    bx=Main_magnifier_factor;
+
+    // Pour chaque ligne
+    do{
+      // TODO a verifier
+      Display_line_on_screen_fast_tall2(x_pos,y,
+        width * Main_magnifier_factor,buffer);
+
+      // Ligne suivante
+      y++;
+      if(y==end_y_pos)
+      {
+        Update_rect(x_pos,y_pos,
+          width*Main_magnifier_factor,end_y_pos-y_pos);
+        return;
+      }
+      bx--;
+    }while(bx!=0);
+
+    src+= image_width;
+  }
+}
+
+

pxtall2.h

@@ -0,0 +1,50 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+//////////////////////////////////////////////////////////////////////////////
+///@file pxtall2.h
+/// Renderer for double-tall pixels (2x4).
+//////////////////////////////////////////////////////////////////////////////
+
+#include "struct.h"
+
+  void Pixel_tall2                      (word x,word y,byte color);
+  byte Read_pixel_tall2                  (word x,word y);
+  void Block_tall2                      (word start_x,word start_y,word width,word height,byte color);
+  void Pixel_preview_normal_tall2       (word x,word y,byte color);
+  void Pixel_preview_magnifier_tall2        (word x,word y,byte color);
+  void Horizontal_XOR_line_tall2      (word x_pos,word y_pos,word width);
+  void Vertical_XOR_line_tall2        (word x_pos,word y_pos,word height);
+  void Display_brush_color_tall2        (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+  void Display_brush_mono_tall2         (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,byte color,word brush_width);
+  void Clear_brush_tall2                (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width);
+  void Remap_screen_tall2               (word x_pos,word y_pos,word width,word height,byte * conversion_table);
+  void Display_part_of_screen_tall2 (word width,word height,word image_width);
+  void Display_line_on_screen_tall2   (word x_pos,word y_pos,word width,byte * line);
+  void Read_line_screen_tall2       (word x_pos,word y_pos,word width,byte * line);
+  void Display_part_of_screen_scaled_tall2(word width,word height,word image_width,byte * buffer);
+  void Display_brush_color_zoom_tall2   (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word brush_width,byte * buffer);
+  void Display_brush_mono_zoom_tall2    (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,byte color,word brush_width,byte * buffer);
+  void Clear_brush_scaled_tall2           (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word image_width,byte * buffer);
+  void Display_brush_tall2             (byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+
+  void Display_line_on_screen_fast_tall2   (word x_pos,word y_pos,word width,byte * line);

pxtriple.c

@@ -0,0 +1,522 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <SDL.h>
+#include "global.h"
+#include "sdlscreen.h"
+#include "misc.h"
+#include "pxtriple.h"
+
+#define ZOOMX 3
+#define ZOOMY 3
+
+void Pixel_triple (word x,word y,byte color)
+/* Affiche un pixel de la color aux coords x;y à l'écran */
+{
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+2) * VIDEO_LINE_WIDTH + 2)=color;
+}
+
+byte Read_pixel_triple (word x,word y)
+/* On retourne la couleur du pixel aux coords données */
+{
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+}
+
+void Block_triple (word start_x,word start_y,word width,word height,byte color)
+/* On affiche un rectangle de la couleur donnée */
+{
+  SDL_Rect rectangle;
+  rectangle.x=start_x*ZOOMX;
+  rectangle.y=start_y*ZOOMY;
+  rectangle.w=width*ZOOMX;
+  rectangle.h=height*ZOOMY;
+  SDL_FillRect(Screen_SDL,&rectangle,color);
+}
+
+void Display_part_of_screen_triple (word width,word height,word image_width)
+/* Afficher une partie de l'image telle quelle sur l'écran */
+{
+  byte* dest=Screen_pixels; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src=Main_offset_Y*image_width+Main_offset_X+Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int dy;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    // On fait une copie de la ligne
+    for (dy=width;dy>0;dy--)
+    {
+      *(dest+2)=*(dest+1)=*dest=*src;
+      src++;
+      dest+=ZOOMX;
+    }
+    // On double la ligne qu'on vient de copier
+    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    // On la triple
+    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+  //Update_rect(0,0,width,height);
+}
+
+void Pixel_preview_normal_triple (word x,word y,byte color)
+/* Affichage d'un pixel dans l'écran, par rapport au décalage de l'image 
+ * dans l'écran, en mode normal (pas en mode loupe)
+ * Note: si on modifie cette procédure, il faudra penser à faire également 
+ * la modif dans la procédure Pixel_Preview_Loupe_SDL. */
+{
+//  if(x-Main_offset_X >= 0 && y - Main_offset_Y >= 0)
+  Pixel_triple(x-Main_offset_X,y-Main_offset_Y,color);
+}
+
+void Pixel_preview_magnifier_triple  (word x,word y,byte color)
+{
+  // Affiche le pixel dans la partie non zoomée
+  Pixel_triple(x-Main_offset_X,y-Main_offset_Y,color);
+  
+  // Regarde si on doit aussi l'afficher dans la partie zoomée
+  if (y >= Limit_top_zoom && y <= Limit_visible_bottom_zoom
+          && x >= Limit_left_zoom && x <= Limit_visible_right_zoom)
+  {
+    // On est dedans
+    int height;
+    int y_zoom = Zoom_factor_table[y-Main_magnifier_offset_Y];
+
+    if (Menu_Y - y_zoom < Main_magnifier_factor)
+      // On ne doit dessiner qu'un morceau du pixel
+      // sinon on dépasse sur le menu
+      height = Menu_Y - y_zoom;
+    else
+      height = Main_magnifier_factor;
+
+    Block_triple(
+      Zoom_factor_table[x-Main_magnifier_offset_X]+Main_X_zoom, 
+      y_zoom, Main_magnifier_factor, height, color
+      );
+  }
+}
+
+void Horizontal_XOR_line_triple(word x_pos,word y_pos,word width)
+{
+  //On calcule la valeur initiale de dest:
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+
+  int x;
+
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
+    *(dest+x+2*VIDEO_LINE_WIDTH+2)=*(dest+x+2*VIDEO_LINE_WIDTH+1)=*(dest+x+2*VIDEO_LINE_WIDTH)=*(dest+x+VIDEO_LINE_WIDTH+2)=*(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+2)=*(dest+x+1)=*(dest+x)=~*(dest+x);
+}
+
+void Vertical_XOR_line_triple(word x_pos,word y_pos,word height)
+{
+  int i;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=height;i>0;i--)
+  {
+    *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=~*dest;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+  }
+}
+
+void Display_brush_color_triple(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = Brush + y_offset * brush_width + x_offset;
+
+  word x,y;
+
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+2*VIDEO_LINE_WIDTH+2) = *(dest+2*VIDEO_LINE_WIDTH+1) = *(dest+2*VIDEO_LINE_WIDTH) = *(dest+VIDEO_LINE_WIDTH+2) = *(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+2) = *(dest+1) = *dest = *src;
+      }
+
+      // Pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_brush_mono_triple(word x_pos, word y_pos,
+        word x_offset, word y_offset, word width, word height,
+        byte transp_color, byte color, word brush_width)
+/* On affiche la brosse en monochrome */
+{
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
+      // l'écran
+  byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
+      // la brosse
+  int x,y;
+
+  for(y=height;y!=0;y--)
+  //Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      if (*src!=transp_color)
+        *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=color;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=brush_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Clear_brush_triple(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
+{
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int x;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=*src;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+// Affiche une brosse (arbitraire) à l'écran
+void Display_brush_triple(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = brush + y_offset * brush_width + x_offset;
+  
+  word x,y;
+  
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=*src;
+      }
+
+      // Pixel suivant
+      src++; dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+}
+
+void Remap_screen_triple(word x_pos,word y_pos,word width,word height,byte * conversion_table)
+{
+  // dest = coords a l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  int x,y;
+
+  // Pour chaque ligne
+  for(y=height;y>0;y--)
+  {
+    // Pour chaque pixel
+    for(x=width;x>0;x--)
+    {
+      *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=
+        conversion_table[*dest];
+      dest +=ZOOMX;
+    }
+
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_line_on_screen_fast_triple(word x_pos,word y_pos,word width,byte * line)
+/* On affiche toute une ligne de pixels telle quelle. */
+/* Utilisée si le buffer contient déja des pixel doublés. */
+{
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+2)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+}
+
+void Display_line_on_screen_triple(word x_pos,word y_pos,word width,byte * line)
+/* On affiche une ligne de pixels en les doublant. */
+{
+  int x;
+  byte *dest;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  for(x=width;x>0;x--)
+  {
+    *(dest+2*VIDEO_LINE_WIDTH+2)=*(dest+2*VIDEO_LINE_WIDTH+1)=*(dest+2*VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+2)=*(dest+1)=*dest=*line;
+    dest+=ZOOMX;
+    line++;
+  }
+}
+void Display_transparent_mono_line_on_screen_triple(
+        word x_pos, word y_pos, word width, byte* line, 
+        byte transp_color, byte color)
+// Affiche une ligne à l'écran avec une couleur + transparence.
+// Utilisé par les brosses en mode zoom
+{
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  int x;
+  // Pour chaque pixel
+  for(x=0;x<width;x++)
+  {
+    if (transp_color!=*line)
+    {
+      *(dest+2)=*(dest+1)=*dest=color;
+    }
+    line ++; // Pixel suivant
+    dest+=ZOOMX;
+  }
+}
+
+void Read_line_screen_triple(word x_pos,word y_pos,word width,byte * line)
+{
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+}
+
+void Display_part_of_screen_scaled_triple(
+        word width, // width non zoomée
+        word height, // height zoomée
+        word image_width,byte * buffer)
+{
+  byte* src = Main_screen + Main_magnifier_offset_Y * image_width 
+                      + Main_magnifier_offset_X;
+  int y = 0; // Ligne en cours de traitement
+
+  // Pour chaque ligne à zoomer
+  while(1)
+  {
+    int x;
+    
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+    // On l'affiche Facteur fois, sur des lignes consécutives
+    x = Main_magnifier_factor/**ZOOMY*/;
+    // Pour chaque ligne
+    do{
+      // On affiche la ligne zoomée
+      Display_line_on_screen_fast_triple(
+        Main_X_zoom, y, width*Main_magnifier_factor,
+        buffer
+      );
+      // On passe à la suivante
+      y++;
+      if(y==height/**ZOOMY*/)
+      {
+        Update_rect(Main_X_zoom,0,
+          width*Main_magnifier_factor,height);
+        return;
+      }
+      x--;
+    }while (x > 0);
+    src += image_width;
+  }
+// ATTENTION on n'arrive jamais ici !
+}
+
+// Affiche une partie de la brosse couleur zoomée
+void Display_brush_color_zoom_triple(word x_pos,word y_pos,
+        word x_offset,word y_offset,
+        word width, // width non zoomée
+        word end_y_pos,byte transp_color,
+        word brush_width, // width réelle de la brosse
+        byte * buffer)
+{
+  byte* src = Brush+y_offset*brush_width + x_offset;
+  word y = y_pos;
+  byte bx;
+
+  // Pour chaque ligne
+  while(1)
+  {
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+    // On affiche facteur fois la ligne zoomée
+    for(bx=Main_magnifier_factor;bx>0;bx--)
+    {
+      byte* line_src = buffer;
+      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      word x;
+      // Pour chaque pixel de la ligne
+      for(x = width*Main_magnifier_factor;x > 0;x--)
+      {
+        if(*line_src!=transp_color)
+        {
+          *(dest+2)=*(dest+1)=*dest = *line_src;
+        }
+        line_src++;
+        dest+=ZOOMX;
+      }
+      // Double the line
+      memcpy(Screen_pixels + (y*ZOOMY+1)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      // Triple the line
+      memcpy(Screen_pixels + (y*ZOOMY+2)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      y++;
+      if(y==end_y_pos)
+      {
+        return;
+      }
+    }
+    src += brush_width;
+  }
+  // ATTENTION zone jamais atteinte
+}
+
+void Display_brush_mono_zoom_triple(word x_pos, word y_pos,
+        word x_offset, word y_offset, 
+        word width, // width non zoomée 
+        word end_y_pos,
+        byte transp_color, byte color, 
+        word brush_width, // width réelle de la brosse
+        byte * buffer
+)
+
+{
+  byte* src = Brush + y_offset * brush_width + x_offset;
+  int y=y_pos*ZOOMY;
+
+  //Pour chaque ligne à zoomer :
+  while(1)
+  {
+    int bx;
+    // src = Ligne originale
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+
+    // On affiche la ligne Facteur fois à l'écran (sur des
+    // lignes consécutives)
+    bx = Main_magnifier_factor*ZOOMY;
+
+    // Pour chaque ligne écran
+    do
+    {
+      // On affiche la ligne zoomée
+      Display_transparent_mono_line_on_screen_triple(
+        x_pos, y, width * Main_magnifier_factor, 
+        buffer, transp_color, color
+      );
+      // On passe à la ligne suivante
+      y++;
+      // On vérifie qu'on est pas à la ligne finale
+      if(y == end_y_pos*ZOOMY)
+      {
+        Update_rect( x_pos, y_pos,
+          width * Main_magnifier_factor, end_y_pos - y_pos );
+        return;
+      }
+      bx --;
+    }
+    while (bx > 0);
+    
+    // Passage à la ligne suivante dans la brosse aussi
+    src+=brush_width;
+  }
+}
+
+void Clear_brush_scaled_triple(word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,__attribute__((unused)) byte transp_color,word image_width,byte * buffer)
+{
+
+  // En fait on va recopier l'image non zoomée dans la partie zoomée !
+  byte* src = Main_screen + y_offset * image_width + x_offset;
+  int y = y_pos;
+  int bx;
+
+  // Pour chaque ligne à zoomer
+  while(1){
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+
+    bx=Main_magnifier_factor;
+
+    // Pour chaque ligne
+    do{
+      // TODO a verifier
+      Display_line_on_screen_fast_triple(x_pos,y,
+        width * Main_magnifier_factor,buffer);
+
+      // Ligne suivante
+      y++;
+      if(y==end_y_pos)
+      {
+        Update_rect(x_pos,y_pos,
+          width*Main_magnifier_factor,end_y_pos-y_pos);
+        return;
+      }
+      bx--;
+    }while(bx!=0);
+
+    src+= image_width;
+  }
+}
+
+

pxtriple.h

@@ -0,0 +1,50 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+//////////////////////////////////////////////////////////////////////////////
+///@file pxtriple.h
+/// Renderer for triple pixels (3x3).
+//////////////////////////////////////////////////////////////////////////////
+
+#include "struct.h"
+
+  void Pixel_triple                      (word x,word y,byte color);
+  byte Read_pixel_triple                  (word x,word y);
+  void Block_triple                      (word start_x,word start_y,word width,word height,byte color);
+  void Pixel_preview_normal_triple       (word x,word y,byte color);
+  void Pixel_preview_magnifier_triple        (word x,word y,byte color);
+  void Horizontal_XOR_line_triple      (word x_pos,word y_pos,word width);
+  void Vertical_XOR_line_triple        (word x_pos,word y_pos,word height);
+  void Display_brush_color_triple        (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+  void Display_brush_mono_triple         (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,byte color,word brush_width);
+  void Clear_brush_triple                (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width);
+  void Remap_screen_triple               (word x_pos,word y_pos,word width,word height,byte * conversion_table);
+  void Display_part_of_screen_triple (word width,word height,word image_width);
+  void Display_line_on_screen_triple   (word x_pos,word y_pos,word width,byte * line);
+  void Read_line_screen_triple       (word x_pos,word y_pos,word width,byte * line);
+  void Display_part_of_screen_scaled_triple(word width,word height,word image_width,byte * buffer);
+  void Display_brush_color_zoom_triple   (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word brush_width,byte * buffer);
+  void Display_brush_mono_zoom_triple    (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,byte color,word brush_width,byte * buffer);
+  void Clear_brush_scaled_triple           (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word image_width,byte * buffer);
+  void Display_brush_triple             (byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+
+  void Display_line_on_screen_fast_triple   (word x_pos,word y_pos,word width,byte * line);

pxwide.c

@@ -29,27 +29,30 @@
 #include "misc.h"
 #include "pxwide.h"
 
+#define ZOOMX 2
+#define ZOOMY 1
+
 void Pixel_wide (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
-  *(Screen_pixels + x * 2 + y * 2 * Screen_width)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
-  *(Screen_pixels + x * 2 + y * 2 * Screen_width + 1)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
 }
 
 byte Read_pixel_wide (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * 2 * Screen_width + x * 2);
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
 }
 
 void Block_wide (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
   SDL_Rect rectangle;
-  rectangle.x=start_x*2;
+  rectangle.x=start_x*ZOOMX;
-  rectangle.y=start_y;
+  rectangle.y=start_y*ZOOMY;
-  rectangle.w=width*2;
+  rectangle.w=width*ZOOMX;
-  rectangle.h=height;
+  rectangle.h=height*ZOOMY;
   SDL_FillRect(Screen_SDL,&rectangle,color);
 }
 
@@ -69,12 +72,12 @@ void Display_part_of_screen_wide (word width,word height,word image_width)
     {
       *(dest+1)=*dest=*src;
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=(Screen_width - width)*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -119,32 +122,29 @@ void Pixel_preview_magnifier_wide  (word x,word y,byte color)
 void Horizontal_XOR_line_wide(word x_pos,word y_pos,word width)
 {
   //On calcule la valeur initiale de dest:
-  byte* dest=y_pos*2*Screen_width+x_pos*2+Screen_pixels;
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
 
   int x;
 
-  for (x=0;x<width*2;x+=2)
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
     *(dest+x+1)=*(dest+x)=~*(dest+x);
 }
 
 void Vertical_XOR_line_wide(word x_pos,word y_pos,word height)
 {
   int i;
-  byte color;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
-  byte *dest=Screen_pixels+x_pos*2+y_pos*Screen_width*2;
   for (i=height;i>0;i--)
   {
-    color=~*dest;
+    *dest=*(dest+1)=~*dest;
-    *dest=color;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
-    *(dest+1)=color;
-    dest+=Screen_width*2;
   }
 }
 
 void Display_brush_color_wide(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   // src = Position dans la brosse
   byte* src = Brush + y_offset * brush_width + x_offset;
 
@@ -164,11 +164,11 @@ void Display_brush_color_wide(word x_pos,word y_pos,word x_offset,word y_offset,
 
       // Pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + (Screen_width - width)*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -179,7 +179,7 @@ void Display_brush_mono_wide(word x_pos, word y_pos,
         byte transp_color, byte color, word brush_width)
 /* On affiche la brosse en monochrome */
 {
-  byte* dest=y_pos*2*Screen_width+x_pos*2+Screen_pixels; // dest = adr Destination à 
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
       // l'écran
   byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
       // la brosse
@@ -196,19 +196,19 @@ void Display_brush_mono_wide(word x_pos, word y_pos,
 
       // On passe au pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=(Screen_width-width)*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
 
 void Clear_brush_wide(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos*2+y_pos*2*Screen_width; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
   byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
   int y;
   int x;
@@ -223,12 +223,12 @@ void Clear_brush_wide(word x_pos,word y_pos,__attribute__((unused)) word x_offse
 
       // On passe au pixel suivant
       src++;
-      dest+=2;
+      dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=(Screen_width-width)*2;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -237,7 +237,7 @@ void Clear_brush_wide(word x_pos,word y_pos,__attribute__((unused)) word x_offse
 void Display_brush_wide(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
 {
   // dest = Position à l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   // src = Position dans la brosse
   byte* src = brush + y_offset * brush_width + x_offset;
   
@@ -256,11 +256,11 @@ void Display_brush_wide(byte * brush, word x_pos,word y_pos,word x_offset,word y
       }
 
       // Pixel suivant
-      src++; dest+=2;
+      src++; dest+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + (Screen_width - width)*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -268,7 +268,7 @@ void Display_brush_wide(byte * brush, word x_pos,word y_pos,word x_offset,word y
 void Remap_screen_wide(word x_pos,word y_pos,word width,word height,byte * conversion_table)
 {
   // dest = coords a l'écran
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   int x,y;
 
   // Pour chaque ligne
@@ -278,10 +278,10 @@ void Remap_screen_wide(word x_pos,word y_pos,word width,word height,byte * conve
     for(x=width;x>0;x--)
     {
       *(dest+1) = *dest = conversion_table[*dest];
-      dest +=2;
+      dest +=ZOOMX;
     }
 
-    dest = dest + (Screen_width - width)*2;
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -291,7 +291,7 @@ void Display_line_on_screen_fast_wide(word x_pos,word y_pos,word width,byte * li
 /* On affiche toute une ligne de pixels telle quelle. */
 /* Utilisée si le buffer contient déja des pixel doublés. */
 {
-  memcpy(Screen_pixels+x_pos*2+y_pos*2*Screen_width,line,width*2);
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
 }
 
 void Display_line_on_screen_wide(word x_pos,word y_pos,word width,byte * line)
@@ -299,13 +299,11 @@ void Display_line_on_screen_wide(word x_pos,word y_pos,word width,byte * line)
 {
   int x;
   byte *dest;
-  dest=Screen_pixels+x_pos*2+y_pos*2*Screen_width;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
   for(x=width;x>0;x--)
   {
-    *dest=*line;
+    *(dest+1)=*dest=*line;
-    dest++;
+    dest+=ZOOMX;
-    *dest=*line;
-    dest++;
     line++;
   }
 }
@@ -315,24 +313,23 @@ void Display_transparent_mono_line_on_screen_wide(
 // Affiche une ligne à l'écran avec une couleur + transparence.
 // Utilisé par les brosses en mode zoom
 {
-  byte* dest = Screen_pixels+ y_pos*2 * Screen_width + x_pos*2;
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
   {
     if (transp_color!=*line)
     {
-      *dest = color;
+      *(dest+1)=*dest=color;
-      *(dest+1) = color;
     }
     line ++; // Pixel suivant
-    dest+=2;
+    dest+=ZOOMX;
   }
 }
 
 void Read_line_screen_wide(word x_pos,word y_pos,word width,byte * line)
 {
-  memcpy(line,Screen_width * 2 * y_pos + x_pos * 2 + Screen_pixels,width*2);
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_wide(
@@ -350,7 +347,7 @@ void Display_part_of_screen_scaled_wide(
     int x;
     
     // On éclate la ligne
-    Zoom_a_line(src,buffer,Main_magnifier_factor*2,width);
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
     // On l'affiche Facteur fois, sur des lignes consécutives
     x = Main_magnifier_factor;
     // Pour chaque ligne
@@ -378,8 +375,7 @@ void Display_part_of_screen_scaled_wide(
 void Display_transparent_line_on_screen_wide(word x_pos,word y_pos,word width,byte* line,byte transp_color)
 {
   byte* src = line;
-  byte* dest = Screen_pixels + y_pos * 2 * Screen_width + x_pos * 2;
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
-
   word x;
 
   // Pour chaque pixel de la ligne
@@ -387,11 +383,10 @@ void Display_transparent_line_on_screen_wide(word x_pos,word y_pos,word width,by
   {
     if(*src!=transp_color)
     {
-      *dest = *src;
+      *(dest+1) = *dest = *src;
-      *(dest+1) = *src;
     }
     src++;
-    dest+=2;
+    dest+=ZOOMX;
   }
 }
 
@@ -414,7 +409,7 @@ void Display_brush_color_zoom_wide(word x_pos,word y_pos,
     // On affiche facteur fois la ligne zoomée
     for(bx=Main_magnifier_factor;bx>0;bx--)
     {
-      Display_transparent_line_on_screen_wide(x_pos,y,width*Main_magnifier_factor,buffer,transp_color);
+      Display_transparent_line_on_screen_wide(x_pos,y*ZOOMY,width*Main_magnifier_factor,buffer,transp_color);
       y++;
       if(y==end_y_pos)
       {
@@ -437,7 +432,7 @@ void Display_brush_mono_zoom_wide(word x_pos, word y_pos,
 
 {
   byte* src = Brush + y_offset * brush_width + x_offset;
-  int y=y_pos;
+  int y=y_pos*ZOOMY;
 
   //Pour chaque ligne à zoomer :
   while(1)
@@ -449,7 +444,7 @@ void Display_brush_mono_zoom_wide(word x_pos, word y_pos,
 
     // On affiche la ligne Facteur fois à l'écran (sur des
     // lignes consécutives)
-    bx = Main_magnifier_factor;
+    bx = Main_magnifier_factor*ZOOMY;
 
     // Pour chaque ligne écran
     do
@@ -462,7 +457,7 @@ void Display_brush_mono_zoom_wide(word x_pos, word y_pos,
       // On passe à la ligne suivante
       y++;
       // On vérifie qu'on est pas à la ligne finale
-      if(y == end_y_pos)
+      if(y == end_y_pos*ZOOMY)
       {
         Update_rect( x_pos, y_pos,
           width * Main_magnifier_factor, end_y_pos - y_pos );
@@ -486,7 +481,7 @@ void Clear_brush_scaled_wide(word x_pos,word y_pos,word x_offset,word y_offset,w
 
   // Pour chaque ligne à zoomer
   while(1){
-    Zoom_a_line(src,buffer,Main_magnifier_factor*2,width);
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
 
     bx=Main_magnifier_factor;
 

pxwide2.c

@@ -0,0 +1,516 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <SDL.h>
+#include "global.h"
+#include "sdlscreen.h"
+#include "misc.h"
+#include "pxwide2.h"
+
+#define ZOOMX 4
+#define ZOOMY 2
+
+void Pixel_wide2 (word x,word y,byte color)
+/* Affiche un pixel de la color aux coords x;y à l'écran */
+{
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 3)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 1)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 2)=color;
+  *(Screen_pixels + x * ZOOMX + (y*ZOOMY+1) * VIDEO_LINE_WIDTH + 3)=color;
+}
+
+byte Read_pixel_wide2 (word x,word y)
+/* On retourne la couleur du pixel aux coords données */
+{
+  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+}
+
+void Block_wide2 (word start_x,word start_y,word width,word height,byte color)
+/* On affiche un rectangle de la couleur donnée */
+{
+  SDL_Rect rectangle;
+  rectangle.x=start_x*ZOOMX;
+  rectangle.y=start_y*ZOOMY;
+  rectangle.w=width*ZOOMX;
+  rectangle.h=height*ZOOMY;
+  SDL_FillRect(Screen_SDL,&rectangle,color);
+}
+
+void Display_part_of_screen_wide2 (word width,word height,word image_width)
+/* Afficher une partie de l'image telle quelle sur l'écran */
+{
+  byte* dest=Screen_pixels; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src=Main_offset_Y*image_width+Main_offset_X+Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int dy;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    // On fait une copie de la ligne
+    for (dy=width;dy>0;dy--)
+    {
+      *(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+      src++;
+      dest+=ZOOMX;
+    }
+    // On double la ligne qu'on vient de copier
+    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+  //Update_rect(0,0,width,height);
+}
+
+void Pixel_preview_normal_wide2 (word x,word y,byte color)
+/* Affichage d'un pixel dans l'écran, par rapport au décalage de l'image 
+ * dans l'écran, en mode normal (pas en mode loupe)
+ * Note: si on modifie cette procédure, il faudra penser à faire également 
+ * la modif dans la procédure Pixel_Preview_Loupe_SDL. */
+{
+//  if(x-Main_offset_X >= 0 && y - Main_offset_Y >= 0)
+  Pixel_wide2(x-Main_offset_X,y-Main_offset_Y,color);
+}
+
+void Pixel_preview_magnifier_wide2  (word x,word y,byte color)
+{
+  // Affiche le pixel dans la partie non zoomée
+  Pixel_wide2(x-Main_offset_X,y-Main_offset_Y,color);
+  
+  // Regarde si on doit aussi l'afficher dans la partie zoomée
+  if (y >= Limit_top_zoom && y <= Limit_visible_bottom_zoom
+          && x >= Limit_left_zoom && x <= Limit_visible_right_zoom)
+  {
+    // On est dedans
+    int height;
+    int y_zoom = Zoom_factor_table[y-Main_magnifier_offset_Y];
+
+    if (Menu_Y - y_zoom < Main_magnifier_factor)
+      // On ne doit dessiner qu'un morceau du pixel
+      // sinon on dépasse sur le menu
+      height = Menu_Y - y_zoom;
+    else
+      height = Main_magnifier_factor;
+
+    Block_wide2(
+      Zoom_factor_table[x-Main_magnifier_offset_X]+Main_X_zoom, 
+      y_zoom, Main_magnifier_factor, height, color
+      );
+  }
+}
+
+void Horizontal_XOR_line_wide2(word x_pos,word y_pos,word width)
+{
+  //On calcule la valeur initiale de dest:
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+
+  int x;
+
+  for (x=0;x<width*ZOOMX;x+=ZOOMX)
+    *(dest+x+VIDEO_LINE_WIDTH+3)=*(dest+x+VIDEO_LINE_WIDTH+2)=*(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+3)=*(dest+x+2)=*(dest+x+1)=*(dest+x)=~*(dest+x);
+}
+
+void Vertical_XOR_line_wide2(word x_pos,word y_pos,word height)
+{
+  int i;
+  byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=height;i>0;i--)
+  {
+    *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*(dest)=~*(dest);
+    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+  }
+}
+
+void Display_brush_color_wide2(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = Brush + y_offset * brush_width + x_offset;
+
+  word x,y;
+
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+VIDEO_LINE_WIDTH+3) = *(dest+VIDEO_LINE_WIDTH+2) = *(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
+      }
+
+      // Pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_brush_mono_wide2(word x_pos, word y_pos,
+        word x_offset, word y_offset, word width, word height,
+        byte transp_color, byte color, word brush_width)
+/* On affiche la brosse en monochrome */
+{
+  byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
+      // l'écran
+  byte* src=brush_width*y_offset+x_offset+Brush; // src = adr ds 
+      // la brosse
+  int x,y;
+
+  for(y=height;y!=0;y--)
+  //Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      if (*src!=transp_color)
+        *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=color;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=brush_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Clear_brush_wide2(word x_pos,word y_pos,__attribute__((unused)) word x_offset,__attribute__((unused)) word y_offset,word width,word height,__attribute__((unused))byte transp_color,word image_width)
+{
+  byte* dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  byte* src = ( y_pos + Main_offset_Y ) * image_width + x_pos + Main_offset_X + Main_screen; //Coords de départ ds la source (src)
+  int y;
+  int x;
+
+  for(y=height;y!=0;y--)
+  // Pour chaque ligne
+  {
+    for(x=width;x!=0;x--)
+    //Pour chaque pixel
+    {
+      *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+
+      // On passe au pixel suivant
+      src++;
+      dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    src+=image_width-width;
+    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+  }
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+// Affiche une brosse (arbitraire) à l'écran
+void Display_brush_wide2(byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width)
+{
+  // dest = Position à l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  // src = Position dans la brosse
+  byte* src = brush + y_offset * brush_width + x_offset;
+  
+  word x,y;
+  
+  // Pour chaque ligne
+  for(y = height;y > 0; y--)
+  {
+    // Pour chaque pixel
+    for(x = width;x > 0; x--)
+    {
+      // On vérifie que ce n'est pas la transparence
+      if(*src != transp_color)
+      {
+        *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*src;
+      }
+
+      // Pixel suivant
+      src++; dest+=ZOOMX;
+    }
+
+    // On passe à la ligne suivante
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    src = src + brush_width - width;
+  }
+}
+
+void Remap_screen_wide2(word x_pos,word y_pos,word width,word height,byte * conversion_table)
+{
+  // dest = coords a l'écran
+  byte* dest = Screen_pixels + y_pos * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+  int x,y;
+
+  // Pour chaque ligne
+  for(y=height;y>0;y--)
+  {
+    // Pour chaque pixel
+    for(x=width;x>0;x--)
+    {
+        *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=
+        conversion_table[*dest];
+      dest +=ZOOMX;
+    }
+
+    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+  }
+
+  Update_rect(x_pos,y_pos,width,height);
+}
+
+void Display_line_on_screen_fast_wide2(word x_pos,word y_pos,word width,byte * line)
+/* On affiche toute une ligne de pixels telle quelle. */
+/* Utilisée si le buffer contient déja des pixel doublés. */
+{
+  memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+}
+
+void Display_line_on_screen_wide2(word x_pos,word y_pos,word width,byte * line)
+/* On affiche une ligne de pixels en les doublant. */
+{
+  int x;
+  byte *dest;
+  dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  for(x=width;x>0;x--)
+  {
+    *(dest+VIDEO_LINE_WIDTH+3)=*(dest+VIDEO_LINE_WIDTH+2)=*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+3)=*(dest+2)=*(dest+1)=*dest=*line;
+    dest+=ZOOMX;
+    line++;
+  }
+}
+void Display_transparent_mono_line_on_screen_wide2(
+        word x_pos, word y_pos, word width, byte* line, 
+        byte transp_color, byte color)
+// Affiche une ligne à l'écran avec une couleur + transparence.
+// Utilisé par les brosses en mode zoom
+{
+  byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  int x;
+  // Pour chaque pixel
+  for(x=0;x<width;x++)
+  {
+    if (transp_color!=*line)
+    {
+      *(dest+3)=*(dest+2)=*(dest+1)=*dest=color;
+    }
+    line ++; // Pixel suivant
+    dest+=ZOOMX;
+  }
+}
+
+void Read_line_screen_wide2(word x_pos,word y_pos,word width,byte * line)
+{
+  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+}
+
+void Display_part_of_screen_scaled_wide2(
+        word width, // width non zoomée
+        word height, // height zoomée
+        word image_width,byte * buffer)
+{
+  byte* src = Main_screen + Main_magnifier_offset_Y * image_width 
+                      + Main_magnifier_offset_X;
+  int y = 0; // Ligne en cours de traitement
+
+  // Pour chaque ligne à zoomer
+  while(1)
+  {
+    int x;
+    
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+    // On l'affiche Facteur fois, sur des lignes consécutives
+    x = Main_magnifier_factor/**ZOOMY*/;
+    // Pour chaque ligne
+    do{
+      // On affiche la ligne zoomée
+      Display_line_on_screen_fast_wide2(
+        Main_X_zoom, y, width*Main_magnifier_factor,
+        buffer
+      );
+      // On passe à la suivante
+      y++;
+      if(y==height/**ZOOMY*/)
+      {
+        Update_rect(Main_X_zoom,0,
+          width*Main_magnifier_factor,height);
+        return;
+      }
+      x--;
+    }while (x > 0);
+    src += image_width;
+  }
+// ATTENTION on n'arrive jamais ici !
+}
+
+// Affiche une partie de la brosse couleur zoomée
+void Display_brush_color_zoom_wide2(word x_pos,word y_pos,
+        word x_offset,word y_offset,
+        word width, // width non zoomée
+        word end_y_pos,byte transp_color,
+        word brush_width, // width réelle de la brosse
+        byte * buffer)
+{
+  byte* src = Brush+y_offset*brush_width + x_offset;
+  word y = y_pos;
+  byte bx;
+
+  // Pour chaque ligne
+  while(1)
+  {
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+    // On affiche facteur fois la ligne zoomée
+    for(bx=Main_magnifier_factor;bx>0;bx--)
+    {
+      byte* line_src = buffer;
+      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      word x;
+      // Pour chaque pixel de la ligne
+      for(x = width*Main_magnifier_factor;x > 0;x--)
+      {
+        if(*line_src!=transp_color)
+        {
+          *(dest+3)=*(dest+2)=*(dest+1)=*dest = *line_src;
+        }
+        line_src++;
+        dest+=ZOOMX;
+      }
+      // Double the line
+      memcpy(Screen_pixels + (y*ZOOMY+1)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main_magnifier_factor);
+      y++;
+      if(y==end_y_pos)
+      {
+        return;
+      }
+    }
+    src += brush_width;
+  }
+  // ATTENTION zone jamais atteinte
+}
+
+void Display_brush_mono_zoom_wide2(word x_pos, word y_pos,
+        word x_offset, word y_offset, 
+        word width, // width non zoomée 
+        word end_y_pos,
+        byte transp_color, byte color, 
+        word brush_width, // width réelle de la brosse
+        byte * buffer
+)
+
+{
+  byte* src = Brush + y_offset * brush_width + x_offset;
+  int y=y_pos*ZOOMY;
+
+  //Pour chaque ligne à zoomer :
+  while(1)
+  {
+    int bx;
+    // src = Ligne originale
+    // On éclate la ligne
+    Zoom_a_line(src,buffer,Main_magnifier_factor,width);
+
+    // On affiche la ligne Facteur fois à l'écran (sur des
+    // lignes consécutives)
+    bx = Main_magnifier_factor*ZOOMY;
+
+    // Pour chaque ligne écran
+    do
+    {
+      // On affiche la ligne zoomée
+      Display_transparent_mono_line_on_screen_wide2(
+        x_pos, y, width * Main_magnifier_factor, 
+        buffer, transp_color, color
+      );
+      // On passe à la ligne suivante
+      y++;
+      // On vérifie qu'on est pas à la ligne finale
+      if(y == end_y_pos*ZOOMY)
+      {
+        Update_rect( x_pos, y_pos,
+          width * Main_magnifier_factor, end_y_pos - y_pos );
+        return;
+      }
+      bx --;
+    }
+    while (bx > 0);
+    
+    // Passage à la ligne suivante dans la brosse aussi
+    src+=brush_width;
+  }
+}
+
+void Clear_brush_scaled_wide2(word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,__attribute__((unused)) byte transp_color,word image_width,byte * buffer)
+{
+
+  // En fait on va recopier l'image non zoomée dans la partie zoomée !
+  byte* src = Main_screen + y_offset * image_width + x_offset;
+  int y = y_pos;
+  int bx;
+
+  // Pour chaque ligne à zoomer
+  while(1){
+    Zoom_a_line(src,buffer,Main_magnifier_factor*ZOOMX,width);
+
+    bx=Main_magnifier_factor;
+
+    // Pour chaque ligne
+    do{
+      // TODO a verifier
+      Display_line_on_screen_fast_wide2(x_pos,y,
+        width * Main_magnifier_factor,buffer);
+
+      // Ligne suivante
+      y++;
+      if(y==end_y_pos)
+      {
+        Update_rect(x_pos,y_pos,
+          width*Main_magnifier_factor,end_y_pos-y_pos);
+        return;
+      }
+      bx--;
+    }while(bx!=0);
+
+    src+= image_width;
+  }
+}
+
+

pxwide2.h

@@ -0,0 +1,50 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2008 Yves Rizoud
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+//////////////////////////////////////////////////////////////////////////////
+///@file pxwide2.h
+/// Renderer for double-wide pixels (4x2).
+//////////////////////////////////////////////////////////////////////////////
+
+#include "struct.h"
+
+  void Pixel_wide2                      (word x,word y,byte color);
+  byte Read_pixel_wide2                  (word x,word y);
+  void Block_wide2                      (word start_x,word start_y,word width,word height,byte color);
+  void Pixel_preview_normal_wide2       (word x,word y,byte color);
+  void Pixel_preview_magnifier_wide2        (word x,word y,byte color);
+  void Horizontal_XOR_line_wide2      (word x_pos,word y_pos,word width);
+  void Vertical_XOR_line_wide2        (word x_pos,word y_pos,word height);
+  void Display_brush_color_wide2        (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+  void Display_brush_mono_wide2         (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,byte color,word brush_width);
+  void Clear_brush_wide2                (word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width);
+  void Remap_screen_wide2               (word x_pos,word y_pos,word width,word height,byte * conversion_table);
+  void Display_part_of_screen_wide2 (word width,word height,word image_width);
+  void Display_line_on_screen_wide2   (word x_pos,word y_pos,word width,byte * line);
+  void Read_line_screen_wide2       (word x_pos,word y_pos,word width,byte * line);
+  void Display_part_of_screen_scaled_wide2(word width,word height,word image_width,byte * buffer);
+  void Display_brush_color_zoom_wide2   (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word brush_width,byte * buffer);
+  void Display_brush_mono_zoom_wide2    (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,byte color,word brush_width,byte * buffer);
+  void Clear_brush_scaled_wide2           (word x_pos,word y_pos,word x_offset,word y_offset,word width,word end_y_pos,byte transp_color,word image_width,byte * buffer);
+  void Display_brush_wide2             (byte * brush, word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,byte transp_color,word brush_width);
+
+  void Display_line_on_screen_fast_wide2   (word x_pos,word y_pos,word width,byte * line);

sdlscreen.c

@@ -28,14 +28,17 @@
 #include "errors.h"
 #include "misc.h"
 
-// Mise à jour minimaliste en nombre de pixels
+// Update method that does a large number of small rectangles, aiming
+// for a minimum number of total pixels updated.
 #define UPDATE_METHOD_MULTI_RECTANGLE 1
-// Mise à jour intermédiaire, par rectangle inclusif.
+// Intermediate update method, does only one update with the smallest
+// rectangle that includes all modified pixels.
 #define UPDATE_METHOD_CUMULATED       2
-// Mise à jour totale, pour les plate-formes qui imposent un Vsync à chaque mise à jour écran.
+// Total screen update, for platforms that impose a Vsync on each SDL update.
-#define UPDATE_METHOD_FULL_PAGE     3
+#define UPDATE_METHOD_FULL_PAGE       3
 
-// UPDATE_METHOD peut être fixé depuis le makefile, sinon c'est ici:
+// UPDATE_METHOD can be set from makefile, otherwise it's selected here
+// depending on the platform :
 #ifndef UPDATE_METHOD
   #if defined(__macosx__) || defined(__FreeBSD__)
     #define UPDATE_METHOD     UPDATE_METHOD_FULL_PAGE
@@ -44,13 +47,13 @@
   #endif
 #endif
 
+/// Sets the new screen/window dimensions.
 void Set_mode_SDL(int *width, int *height, int fullscreen)
-/* On règle la résolution de l'écran */
 {
   Screen_SDL=SDL_SetVideoMode(*width,*height,8,(fullscreen?SDL_FULLSCREEN:0)|SDL_RESIZABLE);
   if(Screen_SDL != NULL)
   {
-    // Vérification du mode obtenu (ce n'est pas toujours celui demandé)
+    // Check the mode we got, in case it was different from the one we requested.
     if (Screen_SDL->w != *width || Screen_SDL->h != *height)
     {
       DEBUG("Error: Got a different video mode than the requested one!",0);
@@ -62,7 +65,7 @@ void Set_mode_SDL(int *width, int *height, int fullscreen)
   else
     DEBUG("Error: Unable to change video mode!",0);
 
-  SDL_ShowCursor(0); // Cache le curseur SDL, on le gère en soft
+  SDL_ShowCursor(0); // Hide the SDL mouse cursor, we use our own
 }
 
 #if (UPDATE_METHOD == UPDATE_METHOD_CUMULATED)
@@ -79,7 +82,7 @@ short Max_Y=10000;
 void Flush_update(void)
 {
 #if (UPDATE_METHOD == UPDATE_METHOD_FULL_PAGE)
-  // Mise à jour de la totalité de l'écran
+  // Do a full screen update
   if (update_is_required)
   {
     SDL_UpdateRect(Screen_SDL, 0, 0, 0, 0);
@@ -89,7 +92,7 @@ void Flush_update(void)
   #if (UPDATE_METHOD == UPDATE_METHOD_CUMULATED)
   if (Min_X>=Max_X || Min_Y>=Max_Y)
   {
-    ; // Rien a faire
+    ; // Nothing to do
   }
   else
   {
@@ -137,9 +140,10 @@ void Update_rect(short x, short y, unsigned short width, unsigned short height)
 
 }
 
-// Convertit une SDL_Surface (couleurs indexées ou RGB) en tableau de bytes (couleurs indexées)
+// Converts a SDL_Surface (indexed colors or RGB) into an array of bytes
-// Si on passe NULL comme destination, elle est allouée par malloc(). Sinon,
+// (indexed colors).
-// attention aux dimensions!
+// If dest is NULL, it's allocated by malloc(). Otherwise, be sure to
+// pass a buffer of the right dimensions.
 byte * Surface_to_bytefield(SDL_Surface *source, byte * dest)
 {
   byte *src;
@@ -171,7 +175,7 @@ byte * Surface_to_bytefield(SDL_Surface *source, byte * dest)
 
 }
 
-// Convertit un index de palette en couleur RGB 24 bits
+/// Gets the RGB 24-bit color currently associated with a palette index.
 SDL_Color Color_to_SDL_color(byte index)
 {
   SDL_Color color;
@@ -182,9 +186,50 @@ SDL_Color Color_to_SDL_color(byte index)
   return color;
 }
 
-// Lecture d'un pixel pour une surface SDL.
+// Reads a pixel in a SDL surface.
-// Attention, ne fonctionne que pour les surfaces 8-bit
+// Warning, this is only suitable for 8-bit surfaces.
 byte Get_SDL_pixel_8(SDL_Surface *bmp, int x, int y)
 {
   return ((byte *)(bmp->pixels))[(y*bmp->pitch+x)];
 }
+
+void Clear_screen(byte color)
+{
+  memset(Screen_SDL->pixels,color,Screen_SDL->pitch*Screen_SDL->h);
+  Update_rect(0,0,0,0);
+}
+
+void Clear_border(byte color)
+{
+  int width;
+  int height;
+  
+  // This function can be called before the graphics mode is set.
+  // Nothing to do then.
+  if (!Screen_SDL)
+    return;
+  
+  width = Screen_SDL->w - Screen_width*Pixel_width;
+  height = Screen_SDL->h - Screen_height*Pixel_height;
+  if (width)
+  {
+    SDL_Rect r;
+    r.x=Screen_SDL->w - width;
+    r.y=0;
+    r.h=Screen_SDL->h;
+    r.w=width;
+    SDL_FillRect(Screen_SDL,&r,color);
+    SDL_UpdateRect(Screen_SDL, r.x, r.y, r.w, r.h);
+  }
+  if (height)
+  {
+    SDL_Rect r;
+    r.x=0;
+    r.y=Screen_SDL->h - height;
+    r.h=height;
+    r.w=Screen_SDL->w - height;
+    SDL_FillRect(Screen_SDL,&r,color);
+    SDL_UpdateRect(Screen_SDL, r.x, r.y, r.w, r.h);
+  }  
+}
+

sdlscreen.h

@@ -31,15 +31,30 @@
 #include <SDL.h>
 #include "struct.h"
 
-  void Set_mode_SDL(int *,int *,int);
+///
+/// This is the number of bytes in a video line for the current mode.
+/// On many platforms it will be the video mode's width (in pixels), rounded up
+/// to be a multiple of 4.
+#define VIDEO_LINE_WIDTH (Screen_SDL->pitch)
 
-  SDL_Rect ** List_SDL_video_modes;
+void Set_mode_SDL(int *,int *,int);
-  byte* Screen_pixels;
 
-  void Update_rect(short x, short y, unsigned short width, unsigned short height);
+SDL_Rect ** List_SDL_video_modes;
-  void Flush_update(void);
+byte* Screen_pixels;
-  byte * Surface_to_bytefield(SDL_Surface *source, byte * dest);
+
-  SDL_Color Color_to_SDL_color(byte);
+void Update_rect(short x, short y, unsigned short width, unsigned short height);
-  byte Get_SDL_pixel_8(SDL_Surface *bmp, int x, int y);
+void Flush_update(void);
+byte * Surface_to_bytefield(SDL_Surface *source, byte * dest);
+SDL_Color Color_to_SDL_color(byte);
+byte Get_SDL_pixel_8(SDL_Surface *bmp, int x, int y);
+
+/// Fills the SDL screen with a given color
+void Clear_screen(byte color);
+
+///
+/// Clears the parts of screen that are outside of the editing area.
+/// There is such area only if the screen mode is not a multiple of the pixel
+/// size, eg: 3x3 pixels in 1024x768 leaves 1 column on the right, 0 rows on bottom.
+void Clear_border(byte color);
   
 #endif // SDLSCREEN_H_INCLUDED

transform.c

@@ -0,0 +1,411 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2009 Yves Rizoud
+    Copyright 2009 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+#include <string.h>
+#include <stdlib.h>
+
+#include "global.h"
+#include "struct.h"
+#include "transform.h"
+#include "engine.h"
+#include "sdlscreen.h"
+#include "windows.h"
+#include "input.h"
+#include "help.h"
+#include "misc.h" // Num2str
+#include "readline.h"
+#include "buttons.h" // Message_out_of_memory()
+#include "pages.h" // Backup_with_new_dimensions()
+
+/// Reduces a fraction A/B to its smallest representation. ie (40,60) becomes (2/3)
+void Factorize(short *a, short *b)
+{
+  // Method: brute-force.
+  short factor;
+    
+  factor=2;
+  while (factor<=*a && factor<=*b)
+  {
+    if (((*a % factor) == 0) && ((*b % factor) == 0))
+    {
+      // common factor is found
+      *a/=factor;
+      *b/=factor;
+      // restart
+      factor=2;
+    }
+    else
+      factor++;
+  }
+}
+
+/// Multiplies original_size by new_ratio/old_ratio, but keeps result in 1-9999 range.
+short Compute_dimension(short original_size, short new_ratio, short old_ratio)
+{
+  long amount;
+  amount = (long)original_size*new_ratio/old_ratio;
+  if (amount>9999)
+    return 9999;
+  else if (amount<1)
+    return 1;
+  else
+    return amount;
+}
+
+void Button_Transform_menu(void)
+{
+  enum RESIZE_UNIT {
+    UNIT_PIXELS  = 1,
+    UNIT_PERCENT = 2,
+    UNIT_RATIO   = 3
+  };
+    
+  char buffer[5];
+  short clicked_button;
+  const char * unit_label[] = {
+    "",
+    "Pixels ",
+    "Percent",
+    "Ratio  "};
+  short last_unit_index = -1;
+  short old_ratio_width;
+  short old_ratio_height;
+  short new_ratio_width;
+  short new_ratio_height;
+  short new_width=Main_image_width;
+  short new_height=Main_image_height;
+  byte need_display_size = 0;
+  
+  // Persistent data
+  static short unit_index = 1; // 1= Pixels, 2= Percent, 3=Ratio
+  static short ratio_is_locked = 1; // True if X and Y resize should go together
+  
+  T_Dropdown_button * unit_button;
+  T_Special_button * input_button[4];
+  short *input_value[4];
+
+  // Set initial ratio
+  if (unit_index == UNIT_PERCENT)
+    new_ratio_width=old_ratio_width=new_ratio_height=old_ratio_height=100;
+  else
+    new_ratio_width=old_ratio_width=new_ratio_height=old_ratio_height=1;
+  
+  Open_window(215,165,"Picture transform");
+
+  Window_display_frame( 5, 15,205,91);
+  Window_display_frame( 5,110, 55,49);
+  Window_display_frame(64,110, 85,49);
+
+  Window_set_normal_button(154,140, 54,14,"Cancel",0,1,KEY_ESC); // 1
+
+  Print_in_window(  9,114,"Mirror",MC_Dark,MC_Light);
+  Window_set_normal_button( 17,125, 27,14,"X\035" ,1,1,SDLK_x);  // 2
+  Window_set_normal_button( 17,140, 27,14,"Y\022" ,1,1,SDLK_y);  // 3
+
+  Print_in_window( 84,114,"Rotate",MC_Dark,MC_Light);
+  Window_set_normal_button( 69,125, 37,14,"-90°"  ,0,1,SDLK_LAST); // 4
+  Window_set_normal_button(107,125, 37,14,"+90°"  ,0,1,SDLK_LAST); // 5
+  Window_set_normal_button( 69,140, 75,14,"180°"  ,0,1,SDLK_LAST); // 6
+
+  Print_in_window( 87, 19,"Resize",MC_Dark,MC_Light);
+  Window_set_normal_button( 80, 86, 60,14,"RESIZE",1,1,SDLK_r);    // 7
+  Print_in_window( 51, 34,"New",MC_Dark,MC_Light);
+  Print_in_window( 96, 34,"Old",MC_Dark,MC_Light);
+  Print_in_window( 30, 44,"X:",MC_Dark,MC_Light);
+  Print_in_window( 30, 59,"Y:",MC_Dark,MC_Light);
+  Print_in_window( 80, 44,":",MC_Dark,MC_Light);
+  Print_in_window( 80, 59,":",MC_Dark,MC_Light);
+  Print_in_window( 44, 75,"Lock proportions",MC_Dark,MC_Light);
+
+  Window_set_normal_button( 28, 72, 13,13,ratio_is_locked?"X":" ",0,1,SDLK_l);// 8
+  unit_button = Window_set_dropdown_button(128,50,69,11,69,unit_label[unit_index],1,0,1,LEFT_SIDE|RIGHT_SIDE);// 9
+  Window_dropdown_add_item(unit_button,UNIT_PIXELS,unit_label[UNIT_PIXELS]);
+  Window_dropdown_add_item(unit_button,UNIT_PERCENT,unit_label[UNIT_PERCENT]);
+  Window_dropdown_add_item(unit_button,UNIT_RATIO,unit_label[UNIT_RATIO]);
+  
+  input_button[0] = Window_set_input_button(45,43,4); // 10
+  input_button[1] = Window_set_input_button(89,43,4); // 11
+  input_button[2] = Window_set_input_button(45,58,4); // 12
+  input_button[3] = Window_set_input_button(89,58,4); // 13
+  
+  Update_window_area(0,0,Window_width, Window_height);
+  
+  Display_cursor();
+
+  do
+  {
+    // Display the coordinates with the right unit
+    if (last_unit_index != unit_index)
+    {
+      switch(unit_index)
+      {
+        case UNIT_PIXELS:
+        default:
+          input_value[0]=&new_width;
+          input_value[1]=&Main_image_width; // Don't worry, it's read-only
+          input_value[2]=&new_height;
+          input_value[3]=&Main_image_height; // Don't worry, it's read-only
+        break;
+        case UNIT_PERCENT:
+        case UNIT_RATIO:
+          input_value[0]=&new_ratio_width;
+          input_value[1]=&old_ratio_width;
+          input_value[2]=&new_ratio_height;
+          input_value[3]=&old_ratio_height;
+        break;
+      }
+      need_display_size=1;
+      last_unit_index=unit_index;
+    }
+    if (need_display_size)
+    {
+      short i;
+      Hide_cursor();
+      for (i=0;i<4;i++)
+      {
+        // "Old" values are not editable, unless the unit is "ratio"
+        byte color = ((unit_index!=UNIT_RATIO) && (i==1 || i==3)) ? MC_Dark : MC_Black;
+        Num2str(*(input_value[i]),buffer,4);
+        Print_in_window_limited(input_button[i]->Pos_X+2,input_button[i]->Pos_Y+2,buffer,input_button[i]->Width/8,color,MC_Light);
+      }
+      Display_cursor();
+      need_display_size=0;
+    }
+  
+    clicked_button=Window_clicked_button();
+    
+    // Contextual help
+    if (Is_shortcut(Key,0x100+BUTTON_HELP))
+    {
+      Key=0;
+      Window_help(BUTTON_ADJUST, "PICTURE TRANSFORM");
+    }
+    else switch(clicked_button)
+    {
+      case 9: // Unit
+        switch(Window_attribute2)
+        {
+          case UNIT_PIXELS:
+           // Do nothing, pixel size was already computed.
+          break;
+          case UNIT_PERCENT:
+            if (unit_index == UNIT_RATIO)
+            {
+              // Approximate from current ratio
+              new_ratio_width = Compute_dimension(new_ratio_width,100,old_ratio_width);
+              new_ratio_height = Compute_dimension(new_ratio_height,100,old_ratio_height);
+              old_ratio_width = 100;
+              old_ratio_height = 100;
+              // Update pixel dimensions, to match percentage exactly
+              new_width=Compute_dimension(Main_image_width, new_ratio_width, old_ratio_width);
+              new_height=Compute_dimension(Main_image_height, new_ratio_height, old_ratio_height);
+            }
+            else // unit_index == UNIT_PIXELS
+            {
+              // Approximate from current pixel size
+              new_ratio_width = new_width*100/Main_image_width;
+              new_ratio_height = new_height*100/Main_image_height;
+              old_ratio_width = 100;
+              old_ratio_height = 100;
+            }
+          break;
+          case UNIT_RATIO:
+            if (unit_index == UNIT_PERCENT)
+            {
+              // Compute simplest ratio from current %
+              Factorize(&new_ratio_width, &old_ratio_width);
+              Factorize(&new_ratio_height, &old_ratio_height);
+            }
+            else // unit_index == UNIT_PIXELS
+            {
+              // Compute simplest ratio from current pixel size
+              new_ratio_width = new_width;
+              new_ratio_height = new_height;
+              old_ratio_width = Main_image_width;
+              old_ratio_height = Main_image_height;
+              Factorize(&new_ratio_width, &old_ratio_width);
+              Factorize(&new_ratio_height, &old_ratio_height);
+            }
+          break;        
+        }
+        
+        unit_index = Window_attribute2;
+        break;
+    
+      case 8: // Lock proportions
+        ratio_is_locked = ! ratio_is_locked;
+        Hide_cursor();
+        Print_in_window(31,75,(ratio_is_locked)?"X":" ",MC_Black,MC_Light);
+        Display_cursor();
+        break;
+
+      case 11: // input old width
+      case 13: // input old height
+        // "Old" values are not editable, unless the unit is "ratio"
+        if (unit_index!=UNIT_RATIO)
+          break;
+      case 10: // input new width
+      case 12: // input new height
+        Num2str(*( input_value[clicked_button-10]),buffer,4);
+        Hide_cursor();
+        if (Readline(input_button[clicked_button-10]->Pos_X+2, 
+          input_button[clicked_button-10]->Pos_Y+2,
+          buffer,
+          4,
+          1))
+        {
+          // Accept entered value
+          *(input_value[clicked_button-10])=atoi(buffer);
+          // 0 is not acceptable size
+          if (*(input_value[clicked_button-10])==0)
+          {
+            *(input_value[clicked_button-10])=1;
+          }
+          // Adapt the other coordinate if X and Y are locked
+          if (ratio_is_locked)
+          {
+            if (clicked_button == 10 || clicked_button == 11 )
+            {
+              // Get Y value because X changed
+              if (unit_index == UNIT_PIXELS)
+              {
+                new_height=Compute_dimension(Main_image_height, new_width, Main_image_width);
+              }
+              else
+              {
+                // Copy the whole ratio
+                new_ratio_height=new_ratio_width;
+                old_ratio_height=old_ratio_width;
+              }                
+            }
+            else //  (clicked_button == 12 || clicked_button == 13)
+            {
+              // Get X value because Y changed
+              if (unit_index == UNIT_PIXELS)
+              {
+                new_width=Compute_dimension(Main_image_width, new_height, Main_image_height);
+              }
+              else
+              {
+                // Copy the whole ratio
+                new_ratio_width=new_ratio_height;
+                old_ratio_width=old_ratio_height;
+              }                
+            }
+          }    
+            
+          // Re-compute ratio from size in pixels
+          if (unit_index == UNIT_PIXELS)
+          {
+            //new_width=(long)Main_image_width*new_ratio_width/old_ratio_width;
+            //new_height=(long)Main_image_height*new_ratio_height/old_ratio_height;
+          }
+          else // Re-compute size in pixels from ratio
+          {
+            new_width=Compute_dimension(Main_image_width,new_ratio_width,old_ratio_width);
+            new_height=Compute_dimension(Main_image_height,new_ratio_height,old_ratio_height);
+          }
+          need_display_size=1;
+        }
+        Display_cursor();
+      break;
+    }
+  }
+  while (clicked_button<=0 || clicked_button>=8);
+
+  Close_window();
+  
+  // The Scroll operation uses the same button as transformation menu.
+  if (Current_operation != OPERATION_SCROLL)
+    Unselect_bouton(BUTTON_ADJUST);
+
+  if (clicked_button != 1) // 1 is Cancel
+  {
+    short old_width;
+    short old_height;
+    
+    // Determine new image dimensions
+    switch (clicked_button)
+    {
+      case  7 : // Resize
+        // Keep new_width and new_height as entered.
+        break;
+      case  2 : // Flip X
+      case  3 : // Flip Y      
+      case  6 : // 180° Rotation
+        new_width=Main_image_width;
+        new_height=Main_image_height;
+        break;
+      
+      case  4 : // -90° Rotation
+      case  5 : // +90° Rotation
+  
+        new_width=Main_image_height;
+        new_height=Main_image_width;  
+        break;
+    }
+    // Memorize the current dimensions
+    old_width=Main_image_width;
+    old_height=Main_image_height;
+    
+    // Allocate a new page
+    if (Backup_with_new_dimensions(1,new_width,new_height))
+    {
+      // The new image is allocated, the new dimensions are already updated.
+      
+      Main_image_is_modified=1;
+      
+      // Process the transformation:
+      switch(clicked_button)
+      {
+        case  2 : // Flip X
+          memcpy(Main_screen,Screen_backup,Main_image_width*Main_image_height);
+          Flip_X_lowlevel(Main_screen, Main_image_width, Main_image_height);
+          break;
+        case  3 : // Flip Y      
+          memcpy(Main_screen,Screen_backup,Main_image_width*Main_image_height);
+          Flip_Y_lowlevel(Main_screen, Main_image_width, Main_image_height);
+          break;
+        case  4 : // -90° Rotation
+          Rotate_270_deg_lowlevel(Screen_backup, Main_screen, old_width, old_height);
+          break;
+        case  5 : // +90° Rotation
+          Rotate_90_deg_lowlevel(Screen_backup, Main_screen, old_width, old_height);
+          break;
+        case  6 : // 180° Rotation
+          memcpy(Main_screen,Screen_backup,Main_image_width*Main_image_height);
+          Rotate_180_deg_lowlevel(Main_screen, Main_image_width, Main_image_height);
+          break;       
+        case  7 : // Resize
+          Rescale(Screen_backup, old_width, old_height, Main_screen, Main_image_width, Main_image_height, 0, 0);
+        break;
+      }
+        Display_all_screen();
+    }
+    else
+    {
+      Display_cursor();
+      Message_out_of_memory();
+      Hide_cursor();
+    }
+  }
+  Display_cursor();
+}

transform.h

@@ -0,0 +1,29 @@
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2009 Yves Rizoud
+    Copyright 2009 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; version 2
+    of the License.
+
+    Grafx2 is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/> or
+    write to the Free Software Foundation, Inc.,
+    59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+//////////////////////////////////////////////////////////////////////////////
+///@file transform.h
+/// Screen and functions for picture transform.
+//////////////////////////////////////////////////////////////////////////////
+
+/// Opens and handles the Picture transform screen.
+void Button_Transform_menu(void);

windows.c

@@ -2394,6 +2394,7 @@ void Remap_screen_after_menu_colors_change(void)
       // On passe la table juste pour ne rafficher que les couleurs modifiées
       Display_menu_palette_avoiding_window(conversion_table);
     }
+    Clear_border(MC_Black);
   }
 
 }
@@ -2529,4 +2530,5 @@ void Compute_optimal_menu_colors(T_Components * palette)
         for (i=0; i<ICON_SPRITE_WIDTH; i++)
           Remap_pixel(&GFX_icon_sprite[k][j][i]);
   }
+  Clear_border(MC_Black);
 }

windows.h

@@ -96,4 +96,6 @@ byte Best_color_nonexcluded(byte red,byte green,byte blue);
 void Horizontal_XOR_line_zoom(short x_pos, short y_pos, short width);
 void Vertical_XOR_line_zoom(short x_pos, short y_pos, short height);
 
+void Change_magnifier_factor(byte factor_index);
+
 #endif