--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/SDL_alphamult.h	Sat Feb 07 17:56:08 2009 +0000
@@ -0,0 +1,36 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2009 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/* Functions to pre-multiply the alpha channel into the color channels */
+
+#define DEFINE_PREMULTIPLY_FUNC(fmt) \
+void \
+SDL_PreMultiplyAlpha##fmt(int w, int h, Uint32 *pixels, int pitch);
+
+DEFINE_PREMULTIPLY_FUNC(ARGB8888)
+DEFINE_PREMULTIPLY_FUNC(RGBA8888)
+DEFINE_PREMULTIPLY_FUNC(ABGR8888)
+DEFINE_PREMULTIPLY_FUNC(BGRA8888)
+
+#undef DEFINE_PREMULTIPLY_FUNC
+
+/* vi: set ts=4 sw=4 expandtab: */