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diff include/SDL_pixels.h @ 3054:8d93bfecb9dc

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Fixed alpha blending textures with the GDI renderer
author Sam Lantinga <slouken@libsdl.org>
date Sat, 07 Feb 2009 17:56:08 +0000
parents 99210400e8b9
children a252014ce27d
line wrap: on
line diff
--- a/include/SDL_pixels.h	Fri Jan 30 06:40:16 2009 +0000
+++ b/include/SDL_pixels.h	Sat Feb 07 17:56:08 2009 +0000
@@ -117,6 +117,12 @@
      (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
      (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8))
 
+#define SDL_ISPIXELFORMAT_ALPHA(format)   \
+    ((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \
+     (SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \
+     (SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \
+     (SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))
+
 #define SDL_ISPIXELFORMAT_FOURCC(format)    \
     ((format) && !((format) & 0x80000000))