added test code for using bitmaps instead of textures for global animations

diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 0759b549fe643dc5ace17a427b8b38f77b6dbd0c..182126f121f04fa855e4858b07600602e740f9f0 100644 (file)
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -54,6 +54,7 @@ static void UpdateScreen(SDL_Rect *rect)
 {
   static unsigned int update_screen_delay = 0;
   unsigned int update_screen_delay_value = 20;         /* (milliseconds) */
+  SDL_Surface *screen = backbuffer->surface;
 
   if (limit_screen_updates &&
       !DelayReached(&update_screen_delay, update_screen_delay_value))
@@ -78,10 +79,29 @@ static void UpdateScreen(SDL_Rect *rect)
   }
 #endif
 
+#if USE_FINAL_SCREEN_BITMAP
+  if (gfx.final_screen_bitmap != NULL) // may not be initialized yet
+  {
+    // !!! TEST !!!
+    // draw global animations using bitmaps instead of using textures
+    // to prevent texture scaling artefacts (this is potentially slower)
+
+    BlitBitmap(backbuffer, gfx.final_screen_bitmap, 0, 0,
+              gfx.win_xsize, gfx.win_ysize, 0, 0);
+
+    // copy global animations to render target buffer, if defined
+    if (gfx.draw_global_anim_function != NULL)
+      gfx.draw_global_anim_function();
+
+    screen = gfx.final_screen_bitmap->surface;
+
+    // force full window redraw
+    rect = NULL;
+  }
+#endif
+
 #if defined(TARGET_SDL2)
 #if USE_RENDERER
-  SDL_Surface *screen = backbuffer->surface;
-
   if (rect)
   {
     int bytes_x = screen->pitch / video.width;
@@ -105,9 +125,11 @@ static void UpdateScreen(SDL_Rect *rect)
   // copy backbuffer to render target buffer
   SDL_RenderCopy(sdl_renderer, sdl_texture, NULL, NULL);
 
+#if !USE_FINAL_SCREEN_BITMAP
   // copy global animations to render target buffer, if defined
   if (gfx.draw_global_anim_function != NULL)
     gfx.draw_global_anim_function();
+#endif
 
   // show render target buffer on screen
   SDL_RenderPresent(sdl_renderer);

diff --git a/src/libgame/sdl.h b/src/libgame/sdl.h
index ad21926cd4c1e98ef7059f1d5b66b90a4aaa8dbe..7cc3b459612f15556249ca3544657b7537f63b08 100644 (file)
--- a/src/libgame/sdl.h
+++ b/src/libgame/sdl.h
@@ -58,6 +58,8 @@
 #define FULLSCREEN_STATUS      FULLSCREEN_AVAILABLE
 #endif
 
+#define USE_FINAL_SCREEN_BITMAP        FALSE
+
 #define CURSOR_MAX_WIDTH       32
 #define CURSOR_MAX_HEIGHT      32
 

diff --git a/src/libgame/system.c b/src/libgame/system.c
index a1fbad08e28bca122f14f3d295e972b1ec3b46b9..d1cb4d35d2ed875a29181b410d034b310fe81285 100644 (file)
--- a/src/libgame/system.c
+++ b/src/libgame/system.c
@@ -207,6 +207,9 @@ void InitGfxWindowInfo(int win_xsize, int win_ysize)
   gfx.background_bitmap_mask = REDRAW_NONE;
 
   ReCreateBitmap(&gfx.background_bitmap, win_xsize, win_ysize, DEFAULT_DEPTH);
+#if USE_FINAL_SCREEN_BITMAP
+  ReCreateBitmap(&gfx.final_screen_bitmap, win_xsize, win_ysize, DEFAULT_DEPTH);
+#endif
 }
 
 void InitGfxScrollbufferInfo(int scrollbuffer_width, int scrollbuffer_height)
@@ -742,6 +745,36 @@ void BlitTextureMasked(Bitmap *bitmap,
                 BLIT_MASKED);
 }
 
+void BlitToScreen(Bitmap *bitmap,
+                 int src_x, int src_y, int width, int height,
+                 int dst_x, int dst_y)
+{
+  if (bitmap == NULL)
+    return;
+
+#if USE_FINAL_SCREEN_BITMAP
+  BlitBitmap(bitmap, gfx.final_screen_bitmap, src_x, src_y,
+            width, height, dst_x, dst_y);
+#else
+  BlitTexture(bitmap, src_x, src_y, width, height, dst_x, dst_y);
+#endif
+}
+
+void BlitToScreenMasked(Bitmap *bitmap,
+                       int src_x, int src_y, int width, int height,
+                       int dst_x, int dst_y)
+{
+  if (bitmap == NULL)
+    return;
+
+#if USE_FINAL_SCREEN_BITMAP
+  BlitBitmapMasked(bitmap, gfx.final_screen_bitmap, src_x, src_y,
+                  width, height, dst_x, dst_y);
+#else
+  BlitTextureMasked(bitmap, src_x, src_y, width, height, dst_x, dst_y);
+#endif
+}
+
 void DrawSimpleBlackLine(Bitmap *bitmap, int from_x, int from_y,
                         int to_x, int to_y)
 {

diff --git a/src/libgame/system.h b/src/libgame/system.h
index a27653da930577d34f5d65b5de5776bd83315c21..875a65400c9c5dd4b6bed756834686abf8bb1a47 100644 (file)
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -804,6 +804,10 @@ struct GfxInfo
   Bitmap *background_bitmap;
   int background_bitmap_mask;
 
+#if USE_FINAL_SCREEN_BITMAP
+  Bitmap *final_screen_bitmap;
+#endif
+
   boolean clipping_enabled;
   int clip_x, clip_y;
   int clip_width, clip_height;
@@ -1351,6 +1355,8 @@ boolean DrawingAreaChanged();
 void BlitBitmapOnBackground(Bitmap *, Bitmap *, int, int, int, int, int, int);
 void BlitTexture(Bitmap *, int, int, int, int, int, int);
 void BlitTextureMasked(Bitmap *, int, int, int, int, int, int);
+void BlitToScreen(Bitmap *, int, int, int, int, int, int);
+void BlitToScreenMasked(Bitmap *, int, int, int, int, int, int);
 void DrawSimpleBlackLine(Bitmap *, int, int, int, int);
 void DrawSimpleWhiteLine(Bitmap *, int, int, int, int);
 void DrawLines(Bitmap *, struct XY *, int, Pixel);