X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=blobdiff_plain;f=src%2Flibgame%2Fsystem.c;h=20ea20bed03553ee0e76107830f8dc3031045e41;hp=7a6618eb9176dc7b08b8de21a9a5891c50c0e25b;hb=2f188e42574d95e8eb63e9137535a2867b482b89;hpb=695b9e3d2e2ee94c93d2e804aa3c23dd34f68a25

diff --git a/src/libgame/system.c b/src/libgame/system.c
index 7a6618eb..20ea20be 100644
--- a/src/libgame/system.c
+++ b/src/libgame/system.c
@@ -491,8 +491,34 @@ void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
   if (DrawingDeactivated(dst_x, dst_y, width, height))
     return;
 
-  sysCopyArea(src_bitmap, dst_bitmap, src_x, src_y, width, height,
-	      dst_x, dst_y, BLIT_OPAQUE);
+#if 0
+  /* !!! APPARENTLY THIS HAS BEEN FIXED IN SDL 1.2.12 !!! */
+#if defined(TARGET_SDL) && defined(PLATFORM_WIN32)
+  if (src_bitmap == dst_bitmap)
+  {
+    /* !!! THIS IS A BUG (IN THE SDL LIBRARY?) AND SHOULD BE FIXED !!! */
+
+    /* needed when blitting directly to same bitmap -- should not be needed with
+       recent SDL libraries, but apparently does not work in 1.2.11 directly */
+
+    static Bitmap *tmp_bitmap = NULL;
+
+    if (tmp_bitmap == NULL)
+      tmp_bitmap = CreateBitmap(MAX(FXSIZE, WIN_XSIZE),
+				MAX(FYSIZE, WIN_YSIZE), DEFAULT_DEPTH);
+
+    sysCopyArea(src_bitmap, tmp_bitmap,
+		src_x, src_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
+    sysCopyArea(tmp_bitmap, dst_bitmap,
+		src_x, src_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
+
+    return;
+  }
+#endif
+#endif
+
+  sysCopyArea(src_bitmap, dst_bitmap,
+	      src_x, src_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
 }
 
 void FadeRectangle(Bitmap *bitmap_cross, int x, int y, int width, int height,