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-rw-r--r--src/mesa/main/fbobject.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index defdebbdefa..72cbb09ab83 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -925,6 +925,12 @@ GLenum
_mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
{
switch (internalFormat) {
+ case GL_ALPHA:
+ case GL_ALPHA4:
+ case GL_ALPHA8:
+ case GL_ALPHA12:
+ case GL_ALPHA16:
+ return GL_ALPHA;
case GL_RGB:
case GL_R3_G3_B2:
case GL_RGB4: