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[gacela.git] / src / gacela_SDL.c

diff --git a/src/gacela_SDL.c b/src/gacela_SDL.c
index 79774444e00acb4caef88de9e842d4057e036b16..f7f4151be78b2b5d4b4b3ef59adb18cf6bb0458a 100644 (file)
--- a/src/gacela_SDL.c
+++ b/src/gacela_SDL.c
@@ -214,6 +214,12 @@ gacela_SDL_SetColorKey (SCM surface, SCM flag, SCM key)
   return scm_from_int (SDL_SetColorKey (get_surface_address (surface), scm_to_int (flag), scm_to_int (key)));
 }
 
+SCM
+gacela_SDL_SetAlpha (SCM surface, SCM flag, SCM alpha)
+{
+  return scm_from_int (SDL_SetAlpha (get_surface_address (surface), scm_to_int (flag), scm_to_int (alpha)));
+}
+
 SCM
 gacela_SDL_LoadBMP (SCM file)
 {
@@ -479,6 +485,7 @@ SDL_register_functions (void* data)
   scm_c_define_gsubr ("SDL_DisplayFormat", 1, 0, 0, gacela_SDL_DisplayFormat);
   scm_c_define_gsubr ("SDL_MapRGB", 4, 0, 0, gacela_SDL_MapRGB);
   scm_c_define_gsubr ("SDL_SetColorKey", 3, 0, 0, gacela_SDL_SetColorKey);
+  scm_c_define_gsubr ("SDL_SetAlpha", 3, 0, 0, gacela_SDL_SetAlpha);
   scm_c_define_gsubr ("SDL_LoadBMP", 1, 0, 0, gacela_SDL_LoadBMP);
   scm_c_define_gsubr ("IMG_Load", 1, 0, 0, gacela_IMG_Load);
   scm_c_define_gsubr ("SDL_GetVideoInfo", 0, 0, 0, gacela_SDL_GetVideoInfo);