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-rw-r--r--src/mesa/main/fbobject.c7
-rw-r--r--src/mesa/main/framebuffer.c3
2 files changed, 7 insertions, 3 deletions
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index f33e027857..1a2e9b1da6 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -393,7 +393,9 @@ test_attachment_completeness(const GLcontext *ctx, GLenum format,
if (format == GL_COLOR) {
if (baseFormat != GL_RGB &&
- baseFormat != GL_RGBA) {
+ baseFormat != GL_RGBA &&
+ (!ctx->Extensions.ARB_framebuffer_object ||
+ baseFormat != GL_ALPHA)) {
att_incomplete("bad format");
att->Complete = GL_FALSE;
return;
@@ -572,7 +574,8 @@ _mesa_test_framebuffer_completeness(GLcontext *ctx, struct gl_framebuffer *fb)
f = texImg->_BaseFormat;
numImages++;
if (f != GL_RGB && f != GL_RGBA && f != GL_DEPTH_COMPONENT
- && f != GL_DEPTH_STENCIL_EXT) {
+ && f != GL_DEPTH_STENCIL_EXT
+ && (!ctx->Extensions.ARB_framebuffer_object || f != GL_ALPHA)) {
fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
fbo_incomplete("texture attachment incomplete", -1);
return;
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 31689c8fe8..01f84180af 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -544,7 +544,8 @@ _mesa_update_framebuffer_visual(struct gl_framebuffer *fb)
const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
const gl_format fmt = rb->Format;
- if (baseFormat == GL_RGBA || baseFormat == GL_RGB) {
+ if (baseFormat == GL_RGBA || baseFormat == GL_RGB ||
+ baseFormat == GL_ALPHA) {
fb->Visual.redBits = _mesa_get_format_bits(fmt, GL_RED_BITS);
fb->Visual.greenBits = _mesa_get_format_bits(fmt, GL_GREEN_BITS);
fb->Visual.blueBits = _mesa_get_format_bits(fmt, GL_BLUE_BITS);