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saves us a dword in sampler state, hw can't do non-integer aniso degree anyway.
To allow aniso 1x (which seems of dubious value but some hardware (radeons)
have such a mode, and even d3d allows specifiying it) redefine anisotropic
filtering as disabled only if max_anistropy is 0.
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Conflicts:
src/gallium/auxiliary/draw/draw_context.c
src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline.c
src/gallium/auxiliary/pipebuffer/Makefile
src/gallium/auxiliary/pipebuffer/SConscript
src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c
src/gallium/auxiliary/tgsi/tgsi_scan.c
src/gallium/drivers/i915/i915_surface.c
src/gallium/drivers/i915/i915_texture.c
src/gallium/drivers/llvmpipe/lp_setup.c
src/gallium/drivers/llvmpipe/lp_tex_sample_c.c
src/gallium/drivers/llvmpipe/lp_texture.c
src/gallium/drivers/softpipe/sp_prim_vbuf.c
src/gallium/state_trackers/xorg/xorg_dri2.c
src/gallium/winsys/drm/intel/gem/intel_drm_api.c
src/gallium/winsys/drm/nouveau/drm/nouveau_drm_api.c
src/gallium/winsys/drm/radeon/core/radeon_drm.c
src/gallium/winsys/drm/vmware/core/vmw_screen_dri.c
src/mesa/state_tracker/st_cb_clear.c
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This patch removes PIPE_TEX_FILTER_ANISO.
Anisotropic filtering is enabled if and only if max_anisotropy > 1.0.
Values between 0.0 and 1.0, inclusive, of max_anisotropy are to be
considered equivalent, and meaning to turn off anisotropic filtering.
This approach has the small drawback of eliminating the possibility of
enabling anisotropic filter on either minification or magnification
separately, which Radeon hardware seems to support, is currently
support by Gallium but not exposed to OpenGL. If this is actually
useful it could be handled by splitting max_anisotropy in two values
and adding an appropriate OpenGL extension.
NOTE: some fiddling & reformatting by keithw to get this patch to
apply. Hopefully nothing broken in the process.
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When we have integer-valued texture formats, the texture border color
must also store integer and uint values.
With GL 3.0, the new glTexParameterIiv() and glTexParameterIuiv() functions
can set the border color to int or uint values.
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Depending on the hardware driver this might not be needed, but it will
cause no harm.
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fragment shaders
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needed
The default texture is used when the current fragment shader has texture
sample instructions but the user has not provided/bound a texture.
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It's possible to call update_samplers() between the time a fragment shader
is bound and when a texture image is defined (such as glClear). This
fixes the case where we don't have a complete texture object yet.
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Conflicts:
src/mesa/state_tracker/st_atom_sampler.c
src/mesa/state_tracker/st_cb_texture.c
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The texture BaseLevel is accounted for in texture layout so it doesn't factor
in here. May also need to adjust max_lod...
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This fixes an AA line crash/regression.
The aaline stage needs to find a free/unused sampler to do its thing.
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Hardware almost universally expects us to set a special filtering mode
when anisotropic filtering is enabled, as opposed to varying a max-aniso
values. Do this once in the state tracker & simplify the driver code.
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Use the code in cso_context.c rather than st_cache.c.
Basically, binding of state objects now goes through the CSO module.
But Vertex/fragment shaders go through pipe->bind_fs/vs_state() since they're
not cached by the CSO module at this time.
Also, update softpipe driver to handle NULL state objects in various places.
This happens during context destruction. May need to update other drivers...
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Bind all the samplers/textures at once rather than piecemeal.
This is easier for drivers to understand.
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This fixes the glsl/texdemo1.c program.
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The effect of this mapping can be acheived by the state tracker and
setting up the pipe texture state pointers to incorporate its affects.
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GLSL sampler variables indicate which texture unit to use for TEX instructions.
Previously, this was baked into the fragment/vertex program and couldn't be
readily changed once set.
Now, SamplerUnits[] array indicates which texture unit is to be used for
each sampler variable. These values are set with glUniform1i().
This is extra state that must be passed to the fragment/vertex program
executor at runtime.
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This controls whether texcoords are interpreted as-is or scaled up from [0,1].
Fixes glDrawPixels/glBitmap problems on i915 when image is non power-of-two.
Also, cleans up the CSO sampler state for i915 a bit.
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state constant state object semantics.
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Bind when the currently bound state is /not/ the one
we just found/created.
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Switch the sample to be an immutable state object.
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