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OpenGL allows mixing and matching depth and stencil renderbuffers in
framebuffer objects while the hardware really only supports interleaved
depth/stencil buffers. This makes for some tricky buffer management.
An extra wrinkle is the situation where the user allocates a 16bpp depth
texture or renderbuffer then tries to render to it along with a stencil
buffer. We'd have to promote the 16bpp Z values to 24-bit Z values and
mix in the stencil values to setup the depth/stencil renderbuffer.
There's no support for that now, so always allocate 32bpp depth textures/
renderbuffers for now.
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Makefile.template
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This reverts commit 7c81124d7c4a4d1da9f48cbf7e82ab1a3a970a7a.
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This reverts commit 53675e5c05c0598b7ea206d5c27dbcae786a2c03.
Conflicts:
src/mesa/drivers/dri/i965/brw_wm_surface_state.c
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This lets us avoid duplicated code for doing so, including the depthstencil
paths that aren't covered by SpanRenderStart/Finish. Those paths were
missing the span funcs setup, leading to a null dereference in the fbotexture
demo.
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Putting the bufmgr in the screen is not thread-safe since the emit_reloc
changes. It also led to a significant performance hit from pthread usage
for the attempted thread-safety (up to 12% of a cpu spent on refcounting
protection in single-threaded 965). The motivation had been to allow
multi-context bufmgr sharing in classic mode, but it wasn't worth the cost.
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