mesa: handle GL_FRONT after translating to it
Without this, we end up throwing errors on code along these lines when
rendering using single-buffering:
GLint att;
glGetIntegerv(GL_READ_BUFFER, &att);
glGetFramebufferAttachmentParameteriv(GL_READ_FRAMEBUFFER, att, ...);
This is because we internally translate GL_BACK (which is what
glGetIntegerv returned) to GL_FRONT, which we don't handle in the
Desktop GL case. So let's start handling it.
This fixes the GLTF-GL33.gtf21.GL2FixedTests.buffer_color.blend_color
test for me.
Fixes: e6ca6e587e7 ("mesa: Handle pbuffers in desktop GL framebuffer attachment queries")
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6815>
diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 54d2a08..ee6f9fa 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -344,6 +344,7 @@
}
switch (attachment) {
+ case GL_FRONT:
case GL_FRONT_LEFT:
/* Front buffers can be allocated on the first use, but
* glGetFramebufferAttachmentParameteriv must work even if that
