Fix Fill, Polyform/Polyline, and Contour fill when using effects (Transparency) with layers: it was reading from all visible layers instead of only current, so the result kind of 'fused' the pixels. Related to issue 245.

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1286 416bcca6-2ee7-4201-b75f-2eb2f807beb1

buttons.c

@@ -4289,12 +4289,8 @@ void Button_Effects(void)
         Display_cursor();
         break;
       case 13 : // Feedback (pour Colorize et Shade)
-        if ((Config.FX_Feedback=!Config.FX_Feedback)) //!!!
-          FX_feedback_screen=Main_backups->Pages->Image[Main_current_layer];
-          // Main_screen
-        else
-          FX_feedback_screen=Main_backups->Pages->Next->Image[Main_current_layer];
-          // Screen_backup
+        Config.FX_Feedback = !Config.FX_Feedback;
+        Update_FX_feedback(Config.FX_Feedback);
         Hide_cursor();
         Display_feedback_state();
         Display_cursor();

global.h

@@ -609,12 +609,6 @@ GFX2_GLOBAL struct
 /// Current effecting function. When no effect is selected this is ::No_effect()
 GFX2_GLOBAL Func_effect Effect_function;
 
-///
-/// Pointer to the image to read, while drawing. It's either ::Main_screen
-/// (the image you draw) when FX feedback is ON, or ::Screen_backup (a backup
-/// copy) when FX feedback is off.
-GFX2_GLOBAL byte * FX_feedback_screen;
-
 ///
 /// Array of booleans, indicates which colors should never be picked by
 /// ::Best_color()

graph.c

@@ -934,7 +934,6 @@ void Fill_general(byte fill_color)
 //
 {
   byte   cursor_shape_before_fill;
-  byte * old_fx_feedback_screen;
   short  x_pos,y_pos;
   short  top_reached  ,bottom_reached;
   short  left_reached,right_reached;
@@ -962,8 +961,7 @@ void Fill_general(byte fill_color)
     Backup();
 
     // On fait attention au Feedback qui DOIT se faire avec le backup.
-    old_fx_feedback_screen=FX_feedback_screen;
-    FX_feedback_screen=Screen_backup;
+    Update_FX_feedback(0);
 
     // On va maintenant "épurer" la zone visible de l'image:
     memset(replace_table,0,256);
@@ -1032,7 +1030,8 @@ void Fill_general(byte fill_color)
         else
           Pixel_in_current_screen(x_pos,y_pos,Read_pixel_from_backup_layer(x_pos,y_pos),0);
 
-    FX_feedback_screen=old_fx_feedback_screen;
+    // Restore original feedback value
+    Update_FX_feedback(Config.FX_Feedback);
 
     //   A la fin, on n'a pas besoin de réafficher le curseur puisque c'est
     // l'appelant qui s'en charge, et on n'a pas besoin de rafficher l'image
@@ -2541,7 +2540,6 @@ void Polyfill_general(int vertices, short * points, int color)
 void Polyfill(int vertices, short * points, int color)
 {
   int index;
-  byte *old_fx_feedback_screen;
 
   Pixel_clipped(points[0],points[1],color);
   if (vertices==1)
@@ -2552,8 +2550,7 @@ void Polyfill(int vertices, short * points, int color)
 
   // Comme pour le Fill, cette operation fait un peu d'"overdraw"
   // (pixels dessinés plus d'une fois) alors on force le FX Feedback à OFF
-  old_fx_feedback_screen=FX_feedback_screen;
-  FX_feedback_screen=Screen_backup;
+  Update_FX_feedback(0);
 
   Pixel_figure=Pixel_clipped;    
   Polyfill_general(vertices,points,color);
@@ -2567,8 +2564,8 @@ void Polyfill(int vertices, short * points, int color)
     Draw_line_general(points[index*2],points[index*2+1],points[index*2+2],points[index*2+3],color);
   Draw_line_general(points[0],points[1],points[index*2],points[index*2+1],color);
 
-  // restore de l'etat du FX Feedback  
-  FX_feedback_screen=old_fx_feedback_screen;
+  // Restore original feedback value
+  Update_FX_feedback(Config.FX_Feedback);
 
 }
 

layers.c

@@ -83,7 +83,7 @@ void Layer_activate(byte layer, short side)
   else
     Update_depth_buffer(); // Only need the depth buffer
   //Download_infos_page_main(Main_backups->Pages);
-  //Download_infos_backup(Main_backups);
+  //Update_FX_feedback(Config.FX_Feedback);
   Display_all_screen();
   Display_layerbar();
   Display_cursor();

pages.c

@@ -218,7 +218,7 @@ void Redraw_layered_image(void)
   #else
   Update_screen_targets();
   #endif
-  Download_infos_backup(Main_backups);
+  Update_FX_feedback(Config.FX_Feedback);
 }
 
 void Update_depth_buffer(void)
@@ -265,7 +265,7 @@ void Update_depth_buffer(void)
     }
   }
   #endif
-  Download_infos_backup(Main_backups);
+  Update_FX_feedback(Config.FX_Feedback);
 }
 
 void Redraw_spare_image(void)
@@ -374,13 +374,15 @@ void Upload_infos_page_spare(T_Page * page)
   }
 }
 
-void Download_infos_backup(T_List_of_pages * list)
+byte * FX_feedback_screen;
+
+void Update_FX_feedback(byte with_feedback)
 {
 
-  if (Config.FX_Feedback)
-    FX_feedback_screen=list->Pages->Image[Main_current_layer];
+  if (with_feedback)
+    FX_feedback_screen=Main_backups->Pages->Image[Main_current_layer];
   else
-    FX_feedback_screen=list->Pages->Next->Image[Main_current_layer];
+    FX_feedback_screen=Main_backups->Pages->Next->Image[Main_current_layer];
 }
 
 void Clear_page(T_Page * page)
@@ -732,7 +734,7 @@ int Init_all_backup_lists(int width,int height)
   
 #endif      
   Download_infos_page_main(Main_backups->Pages); 
-  Download_infos_backup(Main_backups);
+  Update_FX_feedback(Config.FX_Feedback);
 
   // Default values for spare page
   Spare_backups->Pages->Width = width;
@@ -818,7 +820,7 @@ int Backup_with_new_dimensions(int upload,byte layers,int width,int height)
     #else
       Update_screen_targets();
     #endif
-    Download_infos_backup(Main_backups);
+    Update_FX_feedback(Config.FX_Feedback);
     // --
     
     return_code=1;
@@ -904,7 +906,7 @@ void Backup_layers(dword layer_mask)
   Create_new_page(new_page,Main_backups,layer_mask);
   Download_infos_page_main(new_page);
 
-  Download_infos_backup(Main_backups);
+  Update_FX_feedback(Config.FX_Feedback);
 
   // Copy the actual pixels from the backup to the latest page
   for (i=0; i<Main_backups->Pages->Nb_layers;i++)
@@ -1080,7 +1082,7 @@ void End_of_modification(void)
   Update_screen_targets();
 #endif
   
-  Download_infos_backup(Main_backups);
+  Update_FX_feedback(Config.FX_Feedback);
 /*  
   Last_backed_up_layers = 0;
   Backup();

pages.h

@@ -27,6 +27,13 @@
 #ifndef _PAGES_H_
 #define _PAGES_H_
 
+///
+/// Pointer to the image to read, while drawing. It's either the last history
+/// layer page when FX feedback is on, or the history page before it
+/// when FX feedback is off.
+extern byte * FX_feedback_screen;
+
+
 
 //////////////////////////////////////////////////////////////////////////
 /////////////////////////// BACKUP ///////////////////////////////////////
@@ -59,7 +66,6 @@ byte Merge_layer();
 T_Page * New_page(byte nb_layers);
 void Download_infos_page_spare(T_Page * page);
 void Upload_infos_page_spare(T_Page * page);
-void Download_infos_backup(T_List_of_pages * list);
 void Clear_page(T_Page * page);
 void Copy_S_page(T_Page * dest,T_Page * source);
 
@@ -110,6 +116,10 @@ void Update_screen_targets(void);
 int Update_buffers(int width, int height);
 int Update_spare_buffers(int width, int height);
 void Redraw_spare_image(void);
+///
+/// Must be called after changing the head of Main_backups list, or
+/// Main_current_layer
+void Update_FX_feedback(byte with_feedback);
 
 ///
 /// STATISTICS