diff --git a/src/buttons.c b/src/buttons.c
index d48e5cb6..9a6a8a7c 100644
--- a/src/buttons.c
+++ b/src/buttons.c
@@ -49,7 +49,6 @@
 #endif
 #include <ctype.h>
 #include <sys/stat.h>
-#include <SDL.h>
 
 #include "const.h"
 #include "struct.h"
diff --git a/src/buttons_effects.c b/src/buttons_effects.c
index 5b5e5a0d..db1957a0 100644
--- a/src/buttons_effects.c
+++ b/src/buttons_effects.c
@@ -25,7 +25,6 @@
 /// Handles all the effects buttons and setup windows in the effects menu.
 ////////////////////////////////////////////////////////////////////////////
 
-#include <SDL.h>
 #include <stdlib.h>
 #include <string.h>
 
diff --git a/src/global.h b/src/global.h
index dcfcb62c..228eee0e 100644
--- a/src/global.h
+++ b/src/global.h
@@ -30,7 +30,6 @@
 #ifndef _GLOBAL_H_
 #define _GLOBAL_H_
 
-#include <SDL.h>
 #include "struct.h"
 
 // MAIN declares the variables,
@@ -775,10 +774,8 @@ GFX2_GLOBAL iconv_t cd_utf16_inv;   // UTF16 => FROMCODE
 
 // -- Specific to SDL
 
-/// Pointer to the program's screen.
-GFX2_GLOBAL SDL_Surface * Screen_SDL;
 /// Pointer to the current joystick controller.
-GFX2_GLOBAL SDL_Joystick* Joystick;
+//GFX2_GLOBAL SDL_Joystick* Joystick;
 
 /// Indicates "no keyboard shortcut".
 #define KEY_NONE            0
diff --git a/src/graph.c b/src/graph.c
index 4401d1bf..53d33094 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -3169,7 +3169,8 @@ void Horizontal_grid_line(word x_pos,word y_pos,word width)
   int x;
 
   for (x=!(x_pos&1);x<width;x+=2)
-    Pixel(x_pos+x, y_pos, xor_lut[*((y_pos-1)*Pixel_height*VIDEO_LINE_WIDTH+x_pos*Pixel_width+Screen_pixels+x*Pixel_width)]);
+    Pixel(x_pos+x, y_pos, xor_lut[Get_Screen_pixel((x_pos+x)*Pixel_width, (y_pos-1)*Pixel_height)]);
+    //Pixel(x_pos+x, y_pos, xor_lut[*((y_pos-1)*Pixel_height*VIDEO_LINE_WIDTH+x_pos*Pixel_width+Screen_pixels+x*Pixel_width)]);
 }
 
 void Vertical_grid_line(word x_pos,word y_pos,word height)
@@ -3177,7 +3178,8 @@ void Vertical_grid_line(word x_pos,word y_pos,word height)
   int y;
 
   for (y=!(y_pos&1);y<height;y+=2)
-    Pixel(x_pos, y_pos+y, xor_lut[*(Screen_pixels+(x_pos*Pixel_width-1)+(y_pos*Pixel_height+y*Pixel_height)*VIDEO_LINE_WIDTH)]);
+    Pixel(x_pos, y_pos+y, xor_lut[Get_Screen_pixel(x_pos*Pixel_width-1, (y_pos+y)*Pixel_height)]);
+    //Pixel(x_pos, y_pos+y, xor_lut[*(Screen_pixels+(x_pos*Pixel_width-1)+(y_pos*Pixel_height+y*Pixel_height)*VIDEO_LINE_WIDTH)]);
 }
 
 // Tile Grid
diff --git a/src/input.c b/src/input.c
index 6516f2b5..17e863fd 100644
--- a/src/input.c
+++ b/src/input.c
@@ -1071,7 +1071,6 @@ static int Color_cycling(void)
 {
   static byte offset[16];
   int i, color;
-  static SDL_Color PaletteSDL[256];
   int changed; // boolean : true if the palette needs a change in this tick.
   const T_Gradient_range * range;
   int len;
@@ -1112,13 +1111,9 @@ static int Color_cycling(void)
   }
   if (changed)
   {
+    T_Palette palette;
     // Initialize the palette
-    for(color=0;color<256;color++)
-    {
-      PaletteSDL[color].r=Main.palette[color].R;
-      PaletteSDL[color].g=Main.palette[color].G;
-      PaletteSDL[color].b=Main.palette[color].B;
-    }
+    memcpy(palette, Main.palette, sizeof(T_Palette));
     for (i=0; i<16; i++)
     {
       range = &Main.backups->Pages->Gradients->Range[i];
@@ -1128,13 +1123,11 @@ static int Color_cycling(void)
         for(color=range->Start;color<=range->End;color++)
         {
           int new_color = range->Start+((color-range->Start+offset[i])%len);
-          PaletteSDL[color].r=Main.palette[new_color].R;
-          PaletteSDL[color].g=Main.palette[new_color].G;
-          PaletteSDL[color].b=Main.palette[new_color].B;
+          palette[color] = Main.palette[new_color];
         }
       }
     }
-    SDL_SetPalette(Screen_SDL, SDL_PHYSPAL | SDL_LOGPAL, PaletteSDL,0,256);
+    SetPalette(palette, 0, 256);
   }
   return 0;
 }
diff --git a/src/io.c b/src/io.c
index 5d91cc7a..0f66cdde 100644
--- a/src/io.c
+++ b/src/io.c
@@ -25,7 +25,7 @@
 // Fonctions de lecture/ecriture file, gèrent les systèmes big-endian et
 // little-endian.
 
-#include <SDL_endian.h>
+#include <stdio.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -53,6 +53,7 @@
 #else
     #include <dirent.h>
 #endif
+#include <SDL_endian.h>
 
 #include "struct.h"
 #include "io.h"
diff --git a/src/keyboard.c b/src/keyboard.c
index 15cb90e4..1ac5b197 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -22,6 +22,7 @@
 */
 #include <string.h>
 #include <ctype.h>
+#include <SDL.h>
 #include "global.h"
 #include "keyboard.h"
 
diff --git a/src/main.c b/src/main.c
index a3377edc..31349ecd 100644
--- a/src/main.c
+++ b/src/main.c
@@ -631,7 +631,7 @@ int Init_program(int argc,char * argv[])
     return(0);
   }
   
-  Joystick = SDL_JoystickOpen(0);
+  //Joystick = SDL_JoystickOpen(0);
   SDL_EnableKeyRepeat(250, 32);
   SDL_EnableUNICODE(SDL_ENABLE);
   SDL_WM_SetCaption("GrafX2","GrafX2");
diff --git a/src/misc.c b/src/misc.c
index ebd86690..5221d5bc 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -24,7 +24,6 @@
 #if defined(WIN32)
 #define _WIN32_WINNT 0x0500
 #endif
-#include <SDL.h>
 #include <string.h>
 #ifndef _MSC_VER
 #include <strings.h>
@@ -108,8 +107,9 @@ word Count_used_colors_screen_area(dword* usage, word start_x, word start_y,
     for (x = 0; x < width; x++)
     {
       // Get color in screen memory
-      color=*(Screen_pixels+((start_x + x)+(start_y + y) * Screen_width
-        * Pixel_height) * Pixel_width);
+      //color=*(Screen_pixels+((start_x + x)+(start_y + y) * Screen_width
+      //  * Pixel_height) * Pixel_width);
+      color = Get_Screen_pixel(start_x + x, start_y + y);
       usage[color]++; //Un point de plus pour cette couleur
     }
   }
@@ -172,27 +172,24 @@ const T_Components * Get_current_palette(void)
 
 void Set_palette(T_Palette palette)
 {
-  register int i;
-  SDL_Color PaletteSDL[256];
+  int i;
 
   memcpy(Current_palette, palette, sizeof(T_Palette));
   for(i=0;i<256;i++)
   {
-    PaletteSDL[i].r=(palette[i].R=Round_palette_component(palette[i].R));
-    PaletteSDL[i].g=(palette[i].G=Round_palette_component(palette[i].G));
-    PaletteSDL[i].b=(palette[i].B=Round_palette_component(palette[i].B));
+    palette[i].R = Round_palette_component(palette[i].R);
+    palette[i].G = Round_palette_component(palette[i].G);
+    palette[i].B = Round_palette_component(palette[i].B);
   }
-  SDL_SetPalette(Screen_SDL, SDL_PHYSPAL | SDL_LOGPAL, PaletteSDL,0,256);
+  SetPalette(palette,0,256);
 }
 
 void Set_color(byte color, byte red, byte green, byte blue)
 {
-  SDL_Color comp;
-
-  Current_palette[color].R = comp.r = red;
-  Current_palette[color].G = comp.g = green;
-  Current_palette[color].B = comp.b = blue;
-  SDL_SetPalette(Screen_SDL, SDL_PHYSPAL | SDL_LOGPAL, &comp, color, 1);
+  Current_palette[color].R = red;
+  Current_palette[color].G = green;
+  Current_palette[color].B = blue;
+  SetPalette(Current_palette + color, color, 1);
 }
 
 void Wait_end_of_click(void)
diff --git a/src/oldies.c b/src/oldies.c
index b85f7c68..8c72e212 100644
--- a/src/oldies.c
+++ b/src/oldies.c
@@ -20,7 +20,6 @@
     You should have received a copy of the GNU General Public License
     along with Grafx2; if not, see <http://www.gnu.org/licenses/>
 */
-#include <SDL.h>
 #include <string.h>
 #ifndef _MSC_VER
 #include <strings.h>
diff --git a/src/pxdouble.c b/src/pxdouble.c
index 2fbd2832..4c05542b 100644
--- a/src/pxdouble.c
+++ b/src/pxdouble.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -38,40 +37,49 @@
 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 * 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 * 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;
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
 }
 
 byte Read_pixel_double (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_double (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, color);
 }
 
 void Display_part_of_screen_double (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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte *dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
+
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -80,11 +88,11 @@ void Display_part_of_screen_double (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), 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);
 }
@@ -129,53 +137,68 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+  //byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
 
   int x;
+  byte color;
 
-  for (x=0;x<width*ZOOMX;x+=ZOOMX)
-    *(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+1)=*(dest+x)=xor_lut[*(dest+x)];
+  for (x=0;x<width*ZOOMX;x+=ZOOMX) {
+    //*(dest+x+VIDEO_LINE_WIDTH+1)=*(dest+x+VIDEO_LINE_WIDTH)=*(dest+x+1)=*(dest+x)=xor_lut[*(dest+x)];
+    color = xor_lut[Get_Screen_pixel(x_pos*ZOOMX + x, y_pos * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+  }
 }
 
 void Vertical_XOR_line_double(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--)
+  byte color;
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i = 0; i < height; i++)
   {
-    *dest=*(dest+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=xor_lut[*dest];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    color = xor_lut[Get_Screen_pixel(x_pos*ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    //*dest=*(dest+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+VIDEO_LINE_WIDTH+1)=xor_lut[*dest];
+    //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 * 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
     // 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+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+1) = *dest = *src;
+        //*(dest+VIDEO_LINE_WIDTH+1) = *(dest+VIDEO_LINE_WIDTH) = *(dest+1) = *dest = *src;
+        *(dest2+1) = *(dest2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest2+=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);
@@ -186,36 +209,38 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
-      // l'écran
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
       if (*src!=transp_color)
-        *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=color;
+        *(dest2+1)=*(dest2)=*(dest+1)=*dest=color;
+        //*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest2+=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_double(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -223,22 +248,25 @@ void Clear_brush_double(word x_pos,word y_pos,word x_offset,word y_offset,word w
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
-      *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
+      //*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
+      *(dest2+1)=*(dest2)=*(dest+1)=*dest=*src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest2+=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);
 }
@@ -247,30 +275,32 @@ void Clear_brush_double(word x_pos,word y_pos,word x_offset,word y_offset,word w
 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 * 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
     // 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+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
+        //*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*src;
+        *(dest2+1)=*(dest2)=*(dest+1)=*dest=*src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest2+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -278,21 +308,24 @@ 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 * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   int x,y;
 
   // Pour chaque ligne
-  for(y=height;y>0;y--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
-      *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=
+      //*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=
+      *(dest2+1)=*(dest2)=*(dest+1)=*dest=
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest2+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -302,20 +335,26 @@ 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*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*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), line, width*ZOOMX);
+  //memcpy(Screen_pixels+x_pos*ZOOMX+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1), line, width*ZOOMX);
 }
 
 void Display_line_on_screen_double(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--)
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  for(x=0; x<width; x++)
   {
-    *(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*line;
-    dest+=ZOOMX;
+    //*(dest+VIDEO_LINE_WIDTH+1)=*(dest+VIDEO_LINE_WIDTH)=*(dest+1)=*dest=*line;
+    //dest+=ZOOMX;
+    Set_Screen_pixel((x_pos + x) * ZOOMX,     y_pos * ZOOMY, *line);
+    Set_Screen_pixel((x_pos + x) * ZOOMX + 1, y_pos * ZOOMY, *line);
+    Set_Screen_pixel((x_pos + x) * ZOOMX,     y_pos * ZOOMY + 1, *line);
+    Set_Screen_pixel((x_pos + x) * ZOOMX + 1, y_pos * ZOOMY + 1, *line);
     line++;
   }
 }
@@ -325,7 +364,8 @@ 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*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -341,7 +381,8 @@ void Display_transparent_mono_line_on_screen_double(
 
 void Read_line_screen_double(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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_double(
@@ -406,7 +447,8 @@ void Display_brush_color_zoom_double(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       Display_transparent_line_on_screen_wide(x_pos,y*ZOOMY,width*Main.magnifier_factor,buffer,transp_color);
-      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)*VIDEO_LINE_WIDTH + x_pos*ZOOMX, Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x_pos*ZOOMX, width*ZOOMX*Main.magnifier_factor);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/pxquad.c b/src/pxquad.c
index 1d5bbcb2..8f022896 100644
--- a/src/pxquad.c
+++ b/src/pxquad.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,6 +36,7 @@
 void Pixel_quad (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
+#if 0
   *(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;
@@ -53,36 +53,59 @@ void Pixel_quad (word x,word y,byte 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;
+#endif
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY + 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);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_quad (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, 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)
+  //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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -91,15 +114,18 @@ void Display_part_of_screen_quad (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la triple
-    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 2), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la quadruple
-    memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 3), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -144,53 +170,95 @@ void Pixel_preview_magnifier_quad  (word x,word y,byte 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;
+  //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)=xor_lut[*(dest+x)];
+  {
+    //*(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)=xor_lut[*(dest+x)];
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX + x, y_pos * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY + 3, color);
+  }
 }
 
 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--)
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i = 0; i < height; 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)=xor_lut[*(dest)];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    //*(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)=xor_lut[*(dest)];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY + 3, color);
   }
 }
 
 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--)
+  for(y = 0; y < height; y++)
   {
-    // Pour chaque pixel
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
+     // 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;
+        //*(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;
+        *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=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);
@@ -201,36 +269,43 @@ void Display_brush_mono_quad(word x_pos, word y_pos,
         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
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     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;
+        //*(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;
+        *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //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,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -238,22 +313,30 @@ void Clear_brush_quad(word x_pos,word y_pos,word x_offset,word y_offset,word wid
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     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;
+      //*(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;
+      *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -262,30 +345,36 @@ void Clear_brush_quad(word x_pos,word y_pos,word x_offset,word y_offset,word wid
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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;
+        //*(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;
+        *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -293,21 +382,28 @@ void Display_brush_quad(byte * brush, word x_pos,word y_pos,word x_offset,word y
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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=
+      //*(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=
+      *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest =
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -317,22 +413,34 @@ void Display_line_on_screen_fast_quad(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*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);
+  //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);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+1), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+2), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+3), 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;
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
+  byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
+  byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 2);
+  byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 3);
   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+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;
+    *(dest3+3) = *(dest3+2) = *(dest3+1) = *(dest3) = *(dest2+3) = *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *line;
     dest+=ZOOMX;
+    dest1+=ZOOMX;
+    dest2+=ZOOMX;
+    dest3+=ZOOMX;
     line++;
   }
 }
@@ -342,7 +450,8 @@ void Display_transparent_mono_line_on_screen_quad(
 // 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;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -358,7 +467,8 @@ void Display_transparent_mono_line_on_screen_quad(
 
 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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_quad(
@@ -423,7 +533,8 @@ void Display_brush_color_zoom_quad(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       byte* line_src = buffer;
-      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      //byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY);
       word x;
       // Pour chaque pixel de la ligne
       for(x = width*Main.magnifier_factor;x > 0;x--)
@@ -436,11 +547,14 @@ void Display_brush_color_zoom_quad(word x_pos,word y_pos,
         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);
+      //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(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 2), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 3), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
@@ -542,5 +656,3 @@ void Clear_brush_scaled_quad(word x_pos,word y_pos,word x_offset,word y_offset,w
     src+= image_width;
   }
 }
-
-
diff --git a/src/pxsimple.c b/src/pxsimple.c
index a54ab7e1..b8461389 100644
--- a/src/pxsimple.c
+++ b/src/pxsimple.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -34,42 +33,47 @@
 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 * VIDEO_LINE_WIDTH)=color;
+  //*(Screen_pixels + x + y * VIDEO_LINE_WIDTH)=color;
+  Set_Screen_pixel(x, y, color);
 }
 
 byte Read_pixel_simple (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * VIDEO_LINE_WIDTH + x );
+  //return *( Screen_pixels + y * VIDEO_LINE_WIDTH + x );
+  return Get_Screen_pixel(x, y);
 }
 
 void Block_simple (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   SDL_Rect rectangle;
   rectangle.x=start_x;
   rectangle.y=start_y;
   rectangle.w=width;
   rectangle.h=height;
   SDL_FillRect(Screen_SDL,&rectangle,color);
+#endif
+  Screen_FillRect(start_x, start_y, width, height, color);
 }
 
 void Display_part_of_screen_simple (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)
+  //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;
+  word y;
 
-  for(y=height;y!=0;y--)
+  for(y=0;y<height;y++)
   // Pour chaque ligne
   {
+    byte *dest = Get_Screen_pixel_ptr(0, y);
     // On fait une copie de la ligne
     memcpy(dest,src,width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=VIDEO_LINE_WIDTH;
   }
   //Update_rect(0,0,width,height);
 }
@@ -114,7 +118,8 @@ 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*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  //byte* dest=y_pos*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  byte* dest=Get_Screen_pixel_ptr(x_pos, y_pos);
 
   int x;
 
@@ -128,23 +133,25 @@ 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*VIDEO_LINE_WIDTH);
-    *(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=xor_lut[color];
+    //color=*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH);
+    color = Get_Screen_pixel(x_pos, i);
+    //*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=xor_lut[color];
+    Set_Screen_pixel(x_pos, i, xor_lut[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 * VIDEO_LINE_WIDTH + x_pos;
   // 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos + y);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -159,7 +166,6 @@ 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 + VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -170,15 +176,16 @@ 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*VIDEO_LINE_WIDTH+x_pos+Screen_pixels; // dest = adr Destination à 
-      // l'écran
+  // 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--)
+  for(y=0; y<height; y++)
   //Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos + y);
+
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
@@ -192,29 +199,30 @@ void Display_brush_mono_simple(word x_pos, word y_pos,
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_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,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos+y_pos*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  //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;
   (void)x_offset; // unused
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
+  for(y=0; y<height; y++)
   // Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos + y);
     // On fait une copie de la ligne
     memcpy(dest,src,width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=VIDEO_LINE_WIDTH;
+    //dest+=VIDEO_LINE_WIDTH;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -223,15 +231,15 @@ void Clear_brush_simple(word x_pos,word y_pos,word x_offset,word y_offset,word w
 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 * VIDEO_LINE_WIDTH + x_pos;
   // 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos + y);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -246,7 +254,6 @@ void Display_brush_simple(byte * brush, word x_pos,word y_pos,word x_offset,word
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
 }
@@ -254,12 +261,12 @@ 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 * VIDEO_LINE_WIDTH + x_pos;
   int x,y;
 
   // Pour chaque ligne
-  for(y=height;y>0;y--)
+  for(y=0; y<height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos + y);
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
@@ -267,7 +274,7 @@ void Remap_screen_simple(word x_pos,word y_pos,word width,word height,byte * con
       dest ++;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH - width;
+    //dest = dest + VIDEO_LINE_WIDTH - width;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -276,7 +283,9 @@ 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*VIDEO_LINE_WIDTH,line,width);
+  byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos);
+  memcpy(dest, line, width);
+  //memcpy(Screen_pixels+x_pos+y_pos*VIDEO_LINE_WIDTH,line,width);
 }
 
 void Display_transparent_mono_line_on_screen_simple(
@@ -285,7 +294,8 @@ 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 * VIDEO_LINE_WIDTH + x_pos;
+  //byte* dest = Screen_pixels+ y_pos * VIDEO_LINE_WIDTH + x_pos;
+  byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -299,7 +309,8 @@ 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,VIDEO_LINE_WIDTH * y_pos + x_pos + Screen_pixels,width);
+  //memcpy(line,VIDEO_LINE_WIDTH * y_pos + x_pos + Screen_pixels,width);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos, y_pos), width);
 }
 
 void Display_part_of_screen_scaled_simple(
@@ -347,7 +358,8 @@ 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 * VIDEO_LINE_WIDTH + x_pos;
+  //byte* dest = Screen_pixels + y_pos * VIDEO_LINE_WIDTH + x_pos;
+  byte* dest = Get_Screen_pixel_ptr(x_pos, y_pos);
 
   word x;
 
diff --git a/src/pxtall.c b/src/pxtall.c
index 4ed6d123..2c196065 100644
--- a/src/pxtall.c
+++ b/src/pxtall.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -38,45 +37,53 @@
 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*ZOOMY*VIDEO_LINE_WIDTH)=color;
-  *(Screen_pixels + x + (y*ZOOMY+1)*VIDEO_LINE_WIDTH)=color;
+  //*(Screen_pixels + x + y*ZOOMY*VIDEO_LINE_WIDTH)=color;
+  //*(Screen_pixels + x + (y*ZOOMY+1)*VIDEO_LINE_WIDTH)=color;
+  Set_Screen_pixel(x * ZOOMX, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX, y * ZOOMY + 1, color);
 }
 
 byte Read_pixel_tall (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x );
+  //return *( Screen_pixels + y*ZOOMY*VIDEO_LINE_WIDTH + x );
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_tall (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   SDL_Rect rectangle;
   rectangle.x=start_x;
   rectangle.y=start_y*ZOOMY;
   rectangle.w=width;
   rectangle.h=height*ZOOMY;
   SDL_FillRect(Screen_SDL,&rectangle,color);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, color);
 }
 
 void Display_part_of_screen_tall (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)
+  //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;
 
-  for(y=height;y!=0;y--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
     // On fait une copie de la ligne
-    memcpy(dest,src,width);
-    dest+=VIDEO_LINE_WIDTH;
-    memcpy(dest,src,width);
+    //memcpy(dest,src,width);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY), src, width);
+    //dest+=VIDEO_LINE_WIDTH;
+    //memcpy(dest,src,width);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), src, width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=VIDEO_LINE_WIDTH;
+    //dest+=VIDEO_LINE_WIDTH;
   }
   //Update_rect(0,0,width,height);
 }
@@ -121,14 +128,16 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  //byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
 
   int x;
 
   for (x=0;x<width;x++)
     *(dest+x)=xor_lut[*(dest+x)];
 
-  dest=(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  //dest=(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH+x_pos+Screen_pixels;
+  dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
   for (x=0;x<width;x++)
     *(dest+x)=xor_lut[*(dest+x)];
 }
@@ -139,23 +148,26 @@ void Vertical_XOR_line_tall(word x_pos,word y_pos,word height)
   byte color;
   for (i=y_pos*ZOOMY;i<(y_pos+height)*ZOOMY;i++)
   {
-    color=*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH);
-    *(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=xor_lut[color];
+    //color=*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH);
+    color = Get_Screen_pixel(x_pos, i);
+    //*(Screen_pixels+x_pos+i*VIDEO_LINE_WIDTH)=xor_lut[color];
+    Set_Screen_pixel(x_pos, i, xor_lut[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*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   // 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--)
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY + 1);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -163,15 +175,15 @@ void Display_brush_color_tall(word x_pos,word y_pos,word x_offset,word y_offset,
       if(*src != transp_color)
       {
         *dest = *src;
-        *(dest+VIDEO_LINE_WIDTH) = *src;
+        //*(dest+VIDEO_LINE_WIDTH) = *src;
+        *dest2 = *src;
       }
 
       // Pixel suivant
-      src++; dest++;
+      src++; dest++; dest2++;
     }
 
     // On passe à la ligne suivante
-    dest = dest + ZOOMY*VIDEO_LINE_WIDTH - width;
     src = src + brush_width - width;
   }
   Update_rect(x_pos,y_pos,width,height);
@@ -182,56 +194,61 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos+Screen_pixels; // dest = adr Destination à 
-      // l'écran
+  // 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(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY + 1);
+
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
       if (*src!=transp_color)
       {
         *dest=color;
-        *(dest+VIDEO_LINE_WIDTH)=color;
+        //*(dest+VIDEO_LINE_WIDTH)=color;
+        *dest2 = color;
       }
 
       // On passe au pixel suivant
       src++;
       dest++;
+      dest2++;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=ZOOMY*VIDEO_LINE_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,word x_offset,word y_offset,word width,word height,byte transp_color,word image_width)
 {
-  byte* dest=Screen_pixels+x_pos+y_pos*ZOOMY*VIDEO_LINE_WIDTH; //On va se mettre en 0,0 dans l'écran (dest)
+  //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;
   (void)x_offset; // unused
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
+  for(y=0; y<height; y++)
   // Pour chaque ligne
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
     // On fait une copie de la ligne
     memcpy(dest,src,width);
-    dest+=VIDEO_LINE_WIDTH;
+    dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY + 1);
     memcpy(dest,src,width);
 
     // On passe à la ligne suivante
     src+=image_width;
-    dest+=VIDEO_LINE_WIDTH;
+    //dest+=VIDEO_LINE_WIDTH;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -240,15 +257,16 @@ void Clear_brush_tall(word x_pos,word y_pos,word x_offset,word y_offset,word wid
 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*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   // 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--)
+  for(y=0; y<height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY + 1);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -256,15 +274,14 @@ void Display_brush_tall(byte * brush, word x_pos,word y_pos,word x_offset,word y
       if(*src != transp_color)
       {
         *dest = *src;
-        *(dest+VIDEO_LINE_WIDTH) = *src;
+        *dest2 = *src;
       }
 
       // Pixel suivant
-      src++; dest++;
+      src++; dest++; dest2++;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width;
     src = src + brush_width - width;
   }
 }
@@ -272,12 +289,12 @@ 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*ZOOMY*VIDEO_LINE_WIDTH + x_pos;
   int x,y;
 
   // Pour chaque ligne
-  for(y=height*ZOOMY;y>0;y--)
+  for(y=0; y<height*ZOOMY; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + y);
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
@@ -285,7 +302,7 @@ void Remap_screen_tall(word x_pos,word y_pos,word width,word height,byte * conve
       dest ++;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH - width;
+    //dest = dest + VIDEO_LINE_WIDTH - width;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -294,13 +311,16 @@ 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*ZOOMY*VIDEO_LINE_WIDTH,line,width);
-  memcpy(Screen_pixels+x_pos+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width);
+  //memcpy(Screen_pixels+x_pos+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width);
+  //memcpy(Screen_pixels+x_pos+(y_pos*ZOOMY+1)*VIDEO_LINE_WIDTH,line,width);
+  memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), line, width);
+  memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1), line, width);
 }
 
 void Read_line_screen_tall(word x_pos,word y_pos,word width,byte * line)
 {
-  memcpy(line,VIDEO_LINE_WIDTH*ZOOMY*y_pos + x_pos + Screen_pixels,width);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY*y_pos + x_pos + Screen_pixels,width);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width);
 }
 
 void Display_part_of_screen_scaled_tall(
@@ -365,7 +385,8 @@ void Display_brush_color_zoom_tall(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       Display_transparent_line_on_screen_simple(x_pos,y*ZOOMY,width*Main.magnifier_factor,buffer,transp_color);
-      memcpy(Screen_pixels + (y*ZOOMY +1) * VIDEO_LINE_WIDTH + x_pos, Screen_pixels + y*ZOOMY*VIDEO_LINE_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);
+      memcpy(Get_Screen_pixel_ptr(x_pos, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos, y * ZOOMY), width*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/pxtall2.c b/src/pxtall2.c
index 86b0bfa7..a4725fc8 100644
--- a/src/pxtall2.c
+++ b/src/pxtall2.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,6 +36,7 @@
 void Pixel_tall2 (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
+#if 0
   *(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;
@@ -45,36 +45,50 @@ void Pixel_tall2 (word x,word y,byte 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;
+#endif
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 3, 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);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_tall2 (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, 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)
+  //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;
+  word y;
   int dy;
 
-  for(y=height;y!=0;y--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -83,15 +97,18 @@ void Display_part_of_screen_tall2 (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la triple
-    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 2), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la quadruple
-    memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 3), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -136,53 +153,79 @@ void Pixel_preview_magnifier_tall2  (word x,word y,byte 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;
+  //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)=xor_lut[*(dest+x)];
+  {
+    //*(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)=xor_lut[*(dest+x)];
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX + x, y_pos * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 3, color);
+  }
 }
 
 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--)
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=0; i<height; 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)=xor_lut[*(dest)];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    //*(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)=xor_lut[*(dest)];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 3, color);
   }
 }
 
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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;
+        //*(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;
+        *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=*src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=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);
@@ -193,36 +236,43 @@ void Display_brush_mono_tall2(word x_pos, word y_pos,
         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
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     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;
+        //*(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;
+        *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //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,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -230,22 +280,30 @@ void Clear_brush_tall2(word x_pos,word y_pos,word x_offset,word y_offset,word wi
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     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;
+      //*(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;
+      *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=*src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -254,30 +312,36 @@ void Clear_brush_tall2(word x_pos,word y_pos,word x_offset,word y_offset,word wi
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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;
+        //*(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;
+        *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=*src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -285,21 +349,28 @@ void Display_brush_tall2(byte * brush, word x_pos,word y_pos,word x_offset,word
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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)=
+      //*(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)=
+      *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -309,22 +380,34 @@ void Display_line_on_screen_fast_tall2(word x_pos,word y_pos,word width,byte * l
 /* 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);
+  //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);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+1), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+2), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+3), 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;
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
+  byte *dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
+  byte *dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 2);
+  byte *dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 3);
   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+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;
+    *(dest3+1)=*(dest3)=*(dest2+1)=*(dest2)=*(dest1+1)=*(dest1)=*(dest+1)=*(dest)=*line;
     dest+=ZOOMX;
+    dest1+=ZOOMX;
+    dest2+=ZOOMX;
+    dest3+=ZOOMX;
     line++;
   }
 }
@@ -334,7 +417,8 @@ void Display_transparent_mono_line_on_screen_tall2(
 // 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;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos*ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -350,7 +434,8 @@ void Display_transparent_mono_line_on_screen_tall2(
 
 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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_tall2(
@@ -415,7 +500,8 @@ void Display_brush_color_zoom_tall2(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       byte* line_src = buffer;
-      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      //byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY);
       word x;
       // Pour chaque pixel de la ligne
       for(x = width*Main.magnifier_factor;x > 0;x--)
@@ -428,11 +514,14 @@ void Display_brush_color_zoom_tall2(word x_pos,word y_pos,
         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);
+      //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(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 2), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 3), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/pxtall3.c b/src/pxtall3.c
index d9827016..de327348 100644
--- a/src/pxtall3.c
+++ b/src/pxtall3.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,6 +36,7 @@
 void Pixel_tall3 (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
+#if 0
   *(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;
@@ -49,36 +49,54 @@ void Pixel_tall3 (word x,word y,byte 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;
+#endif
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 3, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 3, color);
 }
 
 byte Read_pixel_tall3 (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_tall3 (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, color);
 }
 
 void Display_part_of_screen_tall3 (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)
+  //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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -87,15 +105,18 @@ void Display_part_of_screen_tall3 (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la triple
-    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 2), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la quadruple
-    memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+3*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 3), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -140,53 +161,84 @@ void Pixel_preview_magnifier_tall3  (word x,word y,byte color)
 void Horizontal_XOR_line_tall3(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;
+  //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+2)=*(dest+x+3*VIDEO_LINE_WIDTH+1)=*(dest+x+3*VIDEO_LINE_WIDTH)=*(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+1)=*(dest+x)=xor_lut[*(dest+x)];
+  {
+    //*(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+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+1)=*(dest+x)=xor_lut[*(dest+x)];
+      byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX + x, y_pos * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 3, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 3, color);
+  }
 }
 
 void Vertical_XOR_line_tall3(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--)
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=0; i<height; i++)
   {
-    *(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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)=xor_lut[*(dest)];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    //*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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)=xor_lut[*(dest)];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 2, color);
   }
 }
 
 void Display_brush_color_tall3(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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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+2) =*(dest+3*VIDEO_LINE_WIDTH+1) = *(dest+3*VIDEO_LINE_WIDTH) = *(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;
+        //*(dest+3*VIDEO_LINE_WIDTH+2) =*(dest+3*VIDEO_LINE_WIDTH+1) = *(dest+3*VIDEO_LINE_WIDTH) = *(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;
+        *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=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);
@@ -197,36 +249,43 @@ void Display_brush_mono_tall3(word x_pos, word y_pos,
         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
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
       if (*src!=transp_color)
-        *(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+        //*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+        *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest = color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
 
 void Clear_brush_tall3(word x_pos,word y_pos,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -234,22 +293,30 @@ void Clear_brush_tall3(word x_pos,word y_pos,word x_offset,word y_offset,word wi
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
-      *(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+      //*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+      *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest = *src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -258,30 +325,36 @@ void Clear_brush_tall3(word x_pos,word y_pos,word x_offset,word y_offset,word wi
 void Display_brush_tall3(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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // 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+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+        //*(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+        *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -289,21 +362,28 @@ void Display_brush_tall3(byte * brush, word x_pos,word y_pos,word x_offset,word
 void Remap_screen_tall3(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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
+    byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 3);
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
-        *(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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)=
+        *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest =
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
+      dest3+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -313,21 +393,30 @@ void Display_line_on_screen_fast_tall3(word x_pos,word y_pos,word width,byte * l
 /* 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);
+  //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);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+1), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+2), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+3), line, width*ZOOMX);
 }
 
 void Display_line_on_screen_tall3(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;
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
+  byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
+  byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 2);
+  byte* dest3 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 3);
   for(x=width;x>0;x--)
   {
-    *(dest+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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+3*VIDEO_LINE_WIDTH+2)=*(dest+3*VIDEO_LINE_WIDTH+1)=*(dest+3*VIDEO_LINE_WIDTH)=*(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;
+    *(dest3+2) =*(dest3+1) = *(dest3) = *(dest2+2) =*(dest2+1) = *(dest2) = *(dest1+2) =*(dest1+1) = *(dest1) = *(dest+2) =*(dest+1) = *dest = *line;
     dest+=ZOOMX;
     line++;
   }
@@ -338,7 +427,8 @@ void Display_transparent_mono_line_on_screen_tall3(
 // 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;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -354,7 +444,8 @@ void Display_transparent_mono_line_on_screen_tall3(
 
 void Read_line_screen_tall3(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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_tall3(
@@ -419,7 +510,8 @@ void Display_brush_color_zoom_tall3(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       byte* line_src = buffer;
-      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      //byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y*ZOOMY);
       word x;
       // Pour chaque pixel de la ligne
       for(x = width*Main.magnifier_factor;x > 0;x--)
@@ -432,11 +524,14 @@ void Display_brush_color_zoom_tall3(word x_pos,word y_pos,
         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);
+      //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(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 2), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 3), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/pxtriple.c b/src/pxtriple.c
index 2cb661c1..ffe2c344 100644
--- a/src/pxtriple.c
+++ b/src/pxtriple.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,6 +36,7 @@
 void Pixel_triple (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
+#if 0
   *(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;
@@ -46,36 +46,51 @@ void Pixel_triple (word x,word y,byte 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;
+#endif
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 2, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 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);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_triple (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, 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)
+  //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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte *dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -84,13 +99,15 @@ void Display_part_of_screen_triple (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     // On la triple
-    memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    //memcpy(dest-width*ZOOMX+2*VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 2), Get_Screen_pixel_ptr(0, y * ZOOMY), width * ZOOMX);
     
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -135,53 +152,79 @@ void Pixel_preview_magnifier_triple  (word x,word y,byte 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;
+  //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)=xor_lut[*(dest+x)];
+  {
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX + x, y_pos * ZOOMY)];
+    //*(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)=xor_lut[*(dest+x)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 2, color);
+  }
 }
 
 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--)
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i=0; i<height; 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=xor_lut[*dest];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    //*(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=xor_lut[*dest];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 2, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 2, color);
   }
 }
 
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
     // 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;
+        //*(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;
+        *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=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);
@@ -192,36 +235,41 @@ void Display_brush_mono_triple(word x_pos, word y_pos,
         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
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
     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;
+        //*(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;
+        *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest = color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //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,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -229,22 +277,28 @@ void Clear_brush_triple(word x_pos,word y_pos,word x_offset,word y_offset,word w
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
     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;
+      //*(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;
+      *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest = *src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
+      dest2+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -253,30 +307,33 @@ void Clear_brush_triple(word x_pos,word y_pos,word x_offset,word y_offset,word w
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
     // 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;
+        //*(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;
+        *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest1+=ZOOMX; dest2+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -284,21 +341,25 @@ void Display_brush_triple(byte * brush, word x_pos,word y_pos,word x_offset,word
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+    byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 2);
     // 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=
+      //*(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=
+      *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest =
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest1+=ZOOMX; dest2+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -308,21 +369,30 @@ void Display_line_on_screen_fast_triple(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*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*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(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+1), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY+2), 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;
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
+  byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
+  byte* dest2 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 2);
   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+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;
+    *(dest2+2) = *(dest2+1) = *(dest2) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+2) = *(dest+1) = *dest = *line;
     dest+=ZOOMX;
+    dest1+=ZOOMX;
+    dest2+=ZOOMX;
     line++;
   }
 }
@@ -332,7 +402,8 @@ void Display_transparent_mono_line_on_screen_triple(
 // 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;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos*ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -348,7 +419,8 @@ void Display_transparent_mono_line_on_screen_triple(
 
 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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_triple(
@@ -413,7 +485,8 @@ void Display_brush_color_zoom_triple(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       byte* line_src = buffer;
-      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      //byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY);
       word x;
       // Pour chaque pixel de la ligne
       for(x = width*Main.magnifier_factor;x > 0;x--)
@@ -426,9 +499,11 @@ void Display_brush_color_zoom_triple(word x_pos,word y_pos,
         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);
+      //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(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), 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);
+      //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);
+      memcpy(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 2), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/pxwide.c b/src/pxwide.c
index 6f3675bb..7e3e944a 100644
--- a/src/pxwide.c
+++ b/src/pxwide.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,38 +36,45 @@
 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 * 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)=color;
+  //*(Screen_pixels + x * ZOOMX + y*ZOOMY * VIDEO_LINE_WIDTH + 1)=color;
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY, color);
 }
 
 byte Read_pixel_wide (word x,word y)
 /* On retourne la couleur du pixel aux coords données */
 {
-  return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_wide (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, color);
 }
 
 void Display_part_of_screen_wide (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)
+  //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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte *dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -79,7 +85,7 @@ void Display_part_of_screen_wide (word width,word height,word image_width)
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
   //Update_rect(0,0,width,height);
 }
@@ -124,7 +130,8 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+  //byte* dest=y_pos*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
 
   int x;
 
@@ -135,26 +142,30 @@ void Horizontal_XOR_line_wide(word x_pos,word y_pos,word width)
 void Vertical_XOR_line_wide(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--)
+  byte color;
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i = 0; i < height; i++)
   {
-    *dest=*(dest+1)=xor_lut[*dest];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    //*dest=*(dest+1)=xor_lut[*dest];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
   }
 }
 
 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 * 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -170,7 +181,6 @@ void Display_brush_color_wide(word x_pos,word y_pos,word x_offset,word y_offset,
     }
 
     // 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);
@@ -181,15 +191,15 @@ 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*ZOOMY*VIDEO_LINE_WIDTH+x_pos*ZOOMX+Screen_pixels; // dest = adr destination à 
-      // l'écran
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
@@ -203,14 +213,14 @@ void Display_brush_mono_wide(word x_pos, word y_pos,
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //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,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -218,9 +228,10 @@ void Clear_brush_wide(word x_pos,word y_pos,word x_offset,word y_offset,word wid
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
     for(x=width;x!=0;x--)
     //Pour chaque pixel
     {
@@ -233,7 +244,7 @@ void Clear_brush_wide(word x_pos,word y_pos,word x_offset,word y_offset,word wid
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -242,15 +253,15 @@ void Clear_brush_wide(word x_pos,word y_pos,word x_offset,word y_offset,word wid
 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 * 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
     // Pour chaque pixel
     for(x = width;x > 0; x--)
     {
@@ -265,7 +276,6 @@ void Display_brush_wide(byte * brush, word x_pos,word y_pos,word x_offset,word y
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -273,12 +283,12 @@ 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 * ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
   int x,y;
 
   // Pour chaque ligne
-  for(y=height;y>0;y--)
+  for(y=0; y<height; y++)
   {
+    byte *dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos+y) * ZOOMY);
     // Pour chaque pixel
     for(x=width;x>0;x--)
     {
@@ -286,7 +296,7 @@ void Remap_screen_wide(word x_pos,word y_pos,word width,word height,byte * conve
       dest +=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -296,7 +306,8 @@ 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*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  //memcpy(Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH,line,width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(+x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
 }
 
 void Display_line_on_screen_wide(word x_pos,word y_pos,word width,byte * line)
@@ -304,7 +315,8 @@ 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*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
   for(x=width;x>0;x--)
   {
     *(dest+1)=*dest=*line;
@@ -318,7 +330,8 @@ 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*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -334,7 +347,8 @@ void Display_transparent_mono_line_on_screen_wide(
 
 void Read_line_screen_wide(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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, ZOOMY * y_pos), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_wide(
@@ -382,7 +396,8 @@ 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*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   word x;
 
   // Pour chaque pixel de la ligne
diff --git a/src/pxwide2.c b/src/pxwide2.c
index 8d810ffc..9a5a4231 100644
--- a/src/pxwide2.c
+++ b/src/pxwide2.c
@@ -23,7 +23,6 @@
 
 #include <string.h>
 #include <stdlib.h>
-#include <SDL.h>
 #include "global.h"
 #include "sdlscreen.h"
 #include "misc.h"
@@ -37,6 +36,7 @@
 void Pixel_wide2 (word x,word y,byte color)
 /* Affiche un pixel de la color aux coords x;y à l'écran */
 {
+#if 0
   *(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;
@@ -45,36 +45,50 @@ void Pixel_wide2 (word x,word y,byte 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;
+#endif
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY,     color);
+  Set_Screen_pixel(x * ZOOMX,     y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 1, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 2, y * ZOOMY + 1, color);
+  Set_Screen_pixel(x * ZOOMX + 3, y * ZOOMY + 1, 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);
+  //return *( Screen_pixels + y * ZOOMY * VIDEO_LINE_WIDTH + x * ZOOMX);
+  return Get_Screen_pixel(x * ZOOMX, y * ZOOMY);
 }
 
 void Block_wide2 (word start_x,word start_y,word width,word height,byte color)
 /* On affiche un rectangle de la couleur donnée */
 {
+#if 0
   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);
+#endif
+  Screen_FillRect(start_x * ZOOMX, start_y * ZOOMY, width * ZOOMX, height * ZOOMY, 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)
+  //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--)
+  for(y = 0; y < height; y++)
   // Pour chaque ligne
   {
+    byte* dest = Get_Screen_pixel_ptr(0, y * ZOOMY);
     // On fait une copie de la ligne
     for (dy=width;dy>0;dy--)
     {
@@ -83,11 +97,10 @@ void Display_part_of_screen_wide2 (word width,word height,word image_width)
       dest+=ZOOMX;
     }
     // On double la ligne qu'on vient de copier
-    memcpy(dest-width*ZOOMX+VIDEO_LINE_WIDTH,dest-width*ZOOMX,width*ZOOMX);
+    memcpy(Get_Screen_pixel_ptr(0, y * ZOOMY + 1), Get_Screen_pixel_ptr(0, y * ZOOMY), 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);
 }
@@ -132,53 +145,74 @@ void Pixel_preview_magnifier_wide2  (word x,word y,byte 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;
+  //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)=xor_lut[*(dest+x)];
+  for (x=0;x<width*ZOOMX;x+=ZOOMX) {
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX + x, y_pos * ZOOMY)];
+    //*(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)=xor_lut[*(dest+x)];
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x,     y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 1, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 2, y_pos * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + x + 3, y_pos * ZOOMY + 1, color);
+  }
 }
 
 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--)
+  //byte *dest=Screen_pixels+x_pos*ZOOMX+y_pos*VIDEO_LINE_WIDTH*ZOOMY;
+  for (i = 0; i < height; 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)=xor_lut[*(dest)];
-    dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    //*(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)=xor_lut[*(dest)];
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY;
+    byte color = xor_lut[Get_Screen_pixel(x_pos * ZOOMX, (y_pos + i) * ZOOMY)];
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY, color);
+    Set_Screen_pixel(x_pos * ZOOMX,     (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 1, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 2, (y_pos + i) * ZOOMY + 1, color);
+    Set_Screen_pixel(x_pos * ZOOMX + 3, (y_pos + i) * ZOOMY + 1, color);
   }
 }
 
 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--)
+  for(y = 0; y < height; y++)
   {
-    // Pour chaque pixel
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+     // 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;
+        //*(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;
+        *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=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);
@@ -189,36 +223,40 @@ void Display_brush_mono_wide2(word x_pos, word y_pos,
         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
+  // 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
+  // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+     // Pour chaque pixel
     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;
+        //*(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;
+        *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = color;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=brush_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //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,word x_offset,word y_offset,word width,word height,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)
+  //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;
@@ -226,22 +264,27 @@ void Clear_brush_wide2(word x_pos,word y_pos,word x_offset,word y_offset,word wi
   (void)y_offset; // unused
   (void)transp_color; // unused
 
-  for(y=height;y!=0;y--)
   // Pour chaque ligne
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+     // Pour chaque pixel
     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;
+      //*(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;
+      *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
 
       // On passe au pixel suivant
       src++;
       dest+=ZOOMX;
+      dest1+=ZOOMX;
     }
 
     // On passe à la ligne suivante
     src+=image_width-width;
-    dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
+    //dest+=VIDEO_LINE_WIDTH*ZOOMY-width*ZOOMX;
   }
   Update_rect(x_pos,y_pos,width,height);
 }
@@ -250,30 +293,33 @@ void Clear_brush_wide2(word x_pos,word y_pos,word x_offset,word y_offset,word wi
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+     // Pour chaque pixel
     // 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;
+        //*(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;
+        *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *src;
       }
 
       // Pixel suivant
       src++; dest+=ZOOMX;
+      dest1+=ZOOMX;
     }
 
     // On passe à la ligne suivante
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
     src = src + brush_width - width;
   }
 }
@@ -281,21 +327,25 @@ void Display_brush_wide2(byte * brush, word x_pos,word y_pos,word x_offset,word
 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--)
+  for(y = 0; y < height; y++)
   {
+    byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY);
+    byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, (y_pos + y) * ZOOMY + 1);
+     // Pour chaque pixel
     // 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=
+        //*(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=
+        *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest =
         conversion_table[*dest];
       dest +=ZOOMX;
+      dest1+=ZOOMX;
     }
 
-    dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
+    //dest = dest + VIDEO_LINE_WIDTH*ZOOMY - width*ZOOMX;
   }
 
   Update_rect(x_pos,y_pos,width,height);
@@ -305,20 +355,24 @@ void Display_line_on_screen_fast_wide2(word x_pos,word y_pos,word width,byte * l
 /* 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(Get_Screen_pixel_ptr(x_pos*ZOOMX, y_pos*ZOOMY), line, width*ZOOMX);
+  memcpy(Get_Screen_pixel_ptr(x_pos*ZOOMX, y_pos*ZOOMY+1), 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;
+  //byte *dest;
+  //dest=Screen_pixels+x_pos*ZOOMX+y_pos*ZOOMY*VIDEO_LINE_WIDTH;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY);
+  byte* dest1 = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos * ZOOMY + 1);
   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+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;
+    *(dest1+3) = *(dest1+2) = *(dest1+1) = *(dest1) = *(dest+3) = *(dest+2) = *(dest+1) = *dest = *line;
     dest+=ZOOMX;
+    dest1+=ZOOMX;
     line++;
   }
 }
@@ -328,7 +382,8 @@ void Display_transparent_mono_line_on_screen_wide2(
 // 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;
+  //byte* dest = Screen_pixels+ y_pos*VIDEO_LINE_WIDTH + x_pos*ZOOMX;
+  byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y_pos);
   int x;
   // Pour chaque pixel
   for(x=0;x<width;x++)
@@ -344,7 +399,8 @@ void Display_transparent_mono_line_on_screen_wide2(
 
 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);
+  //memcpy(line,VIDEO_LINE_WIDTH*ZOOMY * y_pos + x_pos * ZOOMX + Screen_pixels,width*ZOOMX);
+  memcpy(line, Get_Screen_pixel_ptr(x_pos * ZOOMX, ZOOMY * y_pos), width*ZOOMX);
 }
 
 void Display_part_of_screen_scaled_wide2(
@@ -409,7 +465,8 @@ void Display_brush_color_zoom_wide2(word x_pos,word y_pos,
     for(bx=Main.magnifier_factor;bx>0;bx--)
     {
       byte* line_src = buffer;
-      byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      //byte* dest = Screen_pixels + y*ZOOMY * VIDEO_LINE_WIDTH + x_pos * ZOOMX;
+      byte* dest = Get_Screen_pixel_ptr(x_pos * ZOOMX, y*ZOOMY);
       word x;
       // Pour chaque pixel de la ligne
       for(x = width*Main.magnifier_factor;x > 0;x--)
@@ -422,7 +479,8 @@ void Display_brush_color_zoom_wide2(word x_pos,word y_pos,
         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);
+      //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(Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY + 1), Get_Screen_pixel_ptr(x_pos * ZOOMX, y * ZOOMY), width*ZOOMX*Main.magnifier_factor);
       y++;
       if(y==end_y_pos)
       {
diff --git a/src/sdlscreen.c b/src/sdlscreen.c
index 8eb20b0d..cba94834 100644
--- a/src/sdlscreen.c
+++ b/src/sdlscreen.c
@@ -64,8 +64,50 @@
   #endif
 #endif
 
+static SDL_Surface * Screen_SDL = NULL;
+
 volatile int Allow_colorcycling=1;
 
+byte Get_Screen_pixel(int x, int y)
+{
+  if (y < 0 || x < 0 || y >= Screen_SDL->h || x >= Screen_SDL->w)
+  {
+    Warning("Get_Screen_pixel() coordinates out of bound");
+    return 0;
+  }
+  return ((byte *)Screen_SDL->pixels)[x + y*(Screen_SDL->pitch)];
+}
+
+void Set_Screen_pixel(int x, int y, byte value)
+{
+  if (y < 0 || x < 0 || y >= Screen_SDL->h || x >= Screen_SDL->w)
+  {
+    Warning("Set_Screen_pixel() coordinates out of bound");
+    return;
+  }
+  ((byte *)Screen_SDL->pixels)[x + y*(Screen_SDL->pitch)] = value;
+}
+
+byte* Get_Screen_pixel_ptr(int x, int y)
+{
+  if (y < 0 || x < 0 || y >= Screen_SDL->h || x >= Screen_SDL->w)
+  {
+    Warning("Get_Screen_pixel_ptr() coordinates out of bound");
+    return NULL;
+  }
+  return (byte *)Screen_SDL->pixels + x + y*(Screen_SDL->pitch);
+}
+
+void Screen_FillRect(int x, int y, int w, int h, byte color)
+{
+  SDL_Rect rectangle;
+  rectangle.x = x;
+  rectangle.y = y;
+  rectangle.w = w;
+  rectangle.h = h;
+  SDL_FillRect(Screen_SDL,&rectangle,color);
+}
+
 /// Sets the new screen/window dimensions.
 void Set_mode_SDL(int *width, int *height, int fullscreen)
 {
@@ -86,7 +128,7 @@ void Set_mode_SDL(int *width, int *height, int fullscreen)
       *width = Screen_SDL->w;
       *height = Screen_SDL->h;
     }
-    Screen_pixels=Screen_SDL->pixels;
+    //Screen_pixels=Screen_SDL->pixels;
   }
   else
   {
@@ -321,6 +363,19 @@ void Get_SDL_Palette(const SDL_Palette * sdl_palette, T_Palette palette)
 
 }
 
+int SetPalette(const T_Components * colors, int firstcolor, int ncolors)
+{
+  int i;
+  SDL_Color PaletteSDL[256];
+
+  for (i = 0; i < ncolors; i++) {
+    PaletteSDL[i].r = colors[i].R;
+    PaletteSDL[i].g = colors[i].G;
+    PaletteSDL[i].b = colors[i].B;
+  }
+  return SDL_SetPalette(Screen_SDL, SDL_PHYSPAL | SDL_LOGPAL, PaletteSDL, firstcolor, ncolors);
+}
+
 void Clear_border(byte color)
 {
   int width;
diff --git a/src/sdlscreen.h b/src/sdlscreen.h
index 6446cc72..81647a36 100644
--- a/src/sdlscreen.h
+++ b/src/sdlscreen.h
@@ -2,6 +2,7 @@
 */
 /*  Grafx2 - The Ultimate 256-color bitmap paint program
 
+    Copyright 2018 Thomas Bernard
     Copyright 2008 Yves Rizoud
     Copyright 2007 Adrien Destugues
     Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
@@ -32,16 +33,17 @@
 #include "struct.h"
 #include "global.h"
 
-///
-/// 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)
-
 void Set_mode_SDL(int *,int *,int);
 
 GFX2_GLOBAL SDL_Rect ** List_SDL_video_modes;
-GFX2_GLOBAL byte* Screen_pixels;
+
+byte Get_Screen_pixel(int x, int y);
+
+void Set_Screen_pixel(int x, int y, byte value);
+
+byte* Get_Screen_pixel_ptr(int x, int y);
+
+void Screen_FillRect(int x, int y, int w, int h, byte color);
 
 void Update_rect(short x, short y, unsigned short width, unsigned short height);
 void Flush_update(void);
@@ -64,6 +66,8 @@ void Set_SDL_pixel_8(SDL_Surface *bmp, int x, int y, byte color);
 /// Convert a SDL Palette to a grafx2 palette
 void Get_SDL_Palette(const SDL_Palette * sdl_palette, T_Palette palette);
 
+int SetPalette(const T_Components * colors, int firstcolor, int ncolors);
+
 ///
 /// 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