On Mobile chipsets, we often enable PipeB instead of PipeA, but the test
in here was insufficient, falling back to pipe A if the area
intersection returned zero. Therefore, in the case where a window went
off to the top of the left of the screen, it would freeze, waiting on
the wrong vblank.
Fix this mess by checking the sarea for a crtc being zero sized, and in
that case always default to the other one.
intelMakeCurrent is called before intelWindowMoved (in fact, it calls
it), so calculation of the correct vblank crtc has not happened yet.
Fix this by making a function that fixes up a set of vblank flags and
call if from both functions.
At this point, GL_EXT_stencil_two_side should probably be disabled.
It may be worth leaving it enabled because it has GLX protocol while
GL_ATI_separate_stencil does not. I'll leave it to one of the r300
maintainers to make the call.
Track separate back-face stencil state for OpenGL 2.0 /
GL_ATI_separate_stencil and GL_EXT_stencil_two_side. This allows all
three to be enabled in a driver. One set of state is set via the 2.0
or ATI functions and is used when STENCIL_TEST_TWO_SIDE_EXT is
disabled. The other is set by StencilFunc and StencilOp when the
active stencil face is set to BACK. The GL_EXT_stencil_two_side spec has
more details.
http://opengl.org/registry/specs/EXT/stencil_two_side.txt
We only allow combined depth+stencil renderbuffers so the complicated code
for splitting and combining separate depth and stencil buffers is no longer
needed.
Take advantage of the GL_FRAMEBUFFER_UNSUPPORTED feature to disallow separate
depth and stencil renderbuffers; only allow combined depth/stencil buffers.
Next up: remove/simplify a bunch of the depth/stencil renderbuffer code.
Also: restore the previously disabled GL_DEPTH_COMPONENT16 case
When we change a FBO's attachments, set _Status=0.
Before using an FBO, check if status != GL_FRAMEBUFFER_COMPLETE.
Also, fix missing GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE status.
Called from the _mesa_test_framebuffer_completeness() function to give the
driver the chance to make a framebuffer as incomplete if it doesn't meet
some specific hardware restriction.
Owain Ainsworth