https://bugs.freedesktop.org/show_bug.cgi?id=28551
Summary: GetFramebufferAttachmentParameteriv() should work on
the onscreen framebuffer
Product: Mesa
Version: git
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Mesa core
AssignedTo: mesa-dev@lists.freedesktop.org
ReportedBy: eba...@gmail.com
according to the ARB_framebuffer_object spec, using
glGetFramebufferAttachmentParameteriv() on GL_FRAMEBUFFER to retrieve the size
of the colors like this:
GLenum attachment = GL_COLOR_ATTACHMENT0;
GLenum pname = GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE;
glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER,
attachment,
pname,
&red_bits);
should be functionally equivalent to:
glGetIntegerv (GL_RED_BITS, &red_bits);
in Mesa, the former works for any FBO, but it doesn't work for the default
onscreen framebuffer.
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