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Saves ~2KB of code.
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Pass a gl_format to intel_create_renderbuffer() instead of GLenum.
Add cases for MESA_FORMAT_XRGB8888 textures and renderbuffers.
However, we don't yet create any renderbuffers or textures with that
format. It seems the default alpha value is zero instead of one.
Need to investigate that first.
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_ActualFormat is replaced by Format (MESA_FORMAT_x).
ColorEncoding, ComponentType, RedBits, GreenBits, BlueBits, etc. are
all replaced by MESA_FORMAT_x queries.
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And remove other unneeded #includes while we're at it.
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Now gl_texture_image::TexFormat is a simple MESA_FORMAT_x enum.
ctx->Driver.ChooseTexture format also returns a MESA_FORMAT_x.
gl_texture_format will go away next.
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i965 can either do SRGBA8_REV format or SARGB8 format, but not SRGBA8.
Could add SRGBA8_REV support to mesa, but simply use SARGB8 for now.
While here, also add true srgb luminance / luminance_alpha support -
unfortunately the published docs fail to mention which asics support
this, tested on g43 so assume this works on any g4x.
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By selecting a 4444 texture format due to a bad test, we hit the
intel_update_wrapper error path, and despite the appearance of error handling
in it and its callers, the desired behavior (software fallback) doesn't occur.
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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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The screen wide info such as pitch and cpp are obsoleted by the FBO
changes, so clean up the last few references to those, except for
setting up the legacy screen regions.
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I broke this with cherry-pick resolving on
93c98a466947570e0589b662df49095b2f4bc43c.
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