added R_TextureHasAlpha function to check if a loaded texture has alpha

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@986 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/gl_textures.c b/gl_textures.c
index 5ac0614f19908c6b9cc6ca3e2fb30d358af0474f..eea2586d8d605bfeffe7b360612064a7dfb47a0c 100644 (file)
--- a/gl_textures.c
+++ b/gl_textures.c
@@ -725,3 +725,12 @@ int R_GetTextureSlots(int count)
        gl_texture_number += count;
        return i;
 }
+
+int R_TextureHasAlpha(rtexture_t *rt)
+{
+       gltexture_t *glt;
+       if (!rt)
+               return false;
+       glt = (gltexture_t *)rt;
+       return (glt->flags & TEXF_ALPHA) != 0;
+}

diff --git a/r_textures.h b/r_textures.h
index 9cfcca3e76d8c0a06184301707ece27d9bda021b..fb4b844d2acf043acc8644df5639a262ea99e60b 100644 (file)
--- a/r_textures.h
+++ b/r_textures.h
@@ -18,3 +18,4 @@ extern rtexture_t *R_LoadTexture (char *identifier, int width, int height, byte
 extern int R_GetTexture (rtexture_t *rt);
 // returns a GL texture slot (only used for lightmaps)
 extern int R_GetTextureSlots(int count);
+extern int R_TextureHasAlpha(rtexture_t *rt);