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I'll be using this in merging brw_wm_emit.c and brw_wm_glsl.c
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This is preparation for merging of brw_wm_glsl.c and
brw_wm_emit.c, and glsl.c doesn't swizzle channel results around.
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For some IZ setups, we'd forget to account for the source depth register
being present, so we'd both read the wrong reg, and write output depth to
the wrong reg.
Bug #22603.
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Conflicts:
src/mesa/main/api_validate.c
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For the TXP instruction we check if the texcoord is really a 4-component
atttibute which requires the divide by W step. This check involved the
projtex_mask field. However, the projtex_mask field was being miscalculated
because of some confusion between vertex program outputs and fragment
program inputs.
1. Rework the size_masks calculation so we correctly set bits corresponding
to fragment program input attributes.
2. Rename projtex_mask to proj_attrib_mask since we're interested in more
than just texcoords (generic varying vars too).
3. Simply the indexing of the size_masks and proj_attrib_mask fields.
4. The tracker::active[] array was mis-dimensioned. Use MAX_PROGRAM_TEMPS
instead of a magic number.
5. Update comments, add new assertions.
With these changes the Lightsmark demo/benchmark renders correctly, until
we eventually hit a GPU lockup...
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...rather than with linear interpolation. Modern hardware should use
perspective-corrected interpolation for colors (as for texcoords).
glHint(GL_PERSPECTIVE_CORRECTION_HINT, mode) can be used to get
linear interpolation if mode = GL_FASTEST.
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Before, if the VP output something that is in the attributes coming into
the WM but which isn't used by the WM, then WM would end up reading subsequent
varyings from the wrong places. This was visible with a GLSL demo
using gl_PointSize in the VS and a varying in the WM, as point size is in
the VUE but not used by the WM. There is now a regression test in piglit,
glsl-unused-varying.
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They seem to be used for something else and using them for shader temps
seems to lead to GPU lock-ups.
Call _mesa_warning() when we run out of temps.
Also, clean up some debug code.
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Make the use_const_buffer field per-program and only call the code which
updates the constant buffer's data if the flag is set.
This should undo the perf regression from 20f3497e4b6756e330f7b3f54e8acaa1d6c92052
(cherry picked from master, commit dc9705d12d162ba6d087eb762e315de9f97bc456)
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Make the use_const_buffer field per-program and only call the code which
updates the constant buffer's data if the flag is set.
This should undo the perf regression from 20f3497e4b6756e330f7b3f54e8acaa1d6c92052
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Use a bitvector of used/free flags.
If we run out of temps, examine the live intervals of the temp regs in
the program and free those which are no longer alive.
Also, enable the new WM const buffer code.
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Everything is in place now for using a true constant buffer for GLSL fragment
shaders. Still some bugs to find though.
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This also cuts instructions by just using the existing bit in the payload
rather than computing it from the determinant in the SF unit and passing it
as a varying down to the WM. Something still goes wrong with getting the
backface color right, but a simpler shader appears to get the right result.
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GLSL shadow() sampler calls are properly propogated down to the driver now.
The glean glsl1 shadow() tests work (except for the alpha channel).
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Previously, the prog_instruction::Data field was used to map original Mesa
instructions to brw instructions in order to resolve subroutine calls. This
was a rather tangled mess. Plus it's an obstacle to implementing dynamic
allocation/growing of the instruction buffer (it's still a fixed size).
Mesa's GLSL compiler emits a label for each subroutine and CAL instruction.
Now we use those labels to patch the subroutine calls after code generation
has been done. We just keep a list of all CAL instructions that needs patching
and a list of all subroutine labels. It's a simple matter to resolve them.
This also consolidates some redundant post-emit code between brw_vs_emit.c and
brw_wm_glsl.c and removes some loops that cleared the prog_instruction::Data
fields at the end.
Plus, a bunch of new comments.
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If the texture swizzle is not XYZW (no-op) add an extra MOV instruction
after the TEX instruction to rearrange the components.
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(Only in fragment shaders, so far. Support for NOISE3 and NOISE4 to come.)
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This is required for threads to be spawned with correctly sized GRF
register blocks.
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1. Follow EXT_texture_rectangle with YCbCr texture
2. swap UV component for MESA_FORMAT_YCBCR
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Conflicts:
src/mesa/drivers/dri/i965/brw_sf.h
src/mesa/drivers/dri/i965/intel_context.c
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eg: #include "shader/program.h" and remove -I$(TOP)/src/mesa/program
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most of the sample working with some small modification
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Mostly:
- update #includes
- update STATE_* token code
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This driver comes from Tungsten Graphics, with a few further modifications by
Intel.
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