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A src register's index can be negative if we're doing indirect
addressing into the constant buffer. Ex: MOV OUT[1], CONST[ADDR[0].x-3]
This fixes the piglit vp-arl-neg-array.vpfp test.
Before this change we were going out of bounds of the t->constants[]
array and getting garbage that later triggered an assertion.
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Fixes piglit vpfp-generic arl.vpfp failure when using gallium.
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These haven't been used by the mesa state tracker since the
conversion to tgsi_ureg, and it seems that none of the
other state trackers are using it either.
This helps simplify one of the biggest suprises when starting off with
TGSI shaders.
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Provide a dummy implementation in the GL state tracker (move 0.5 to
the destination regs).
At some point, a motivated person could add a better
implementation of noise. Currently not even the nvidia
binary drivers do anything more than this. In any case, the
place to do this is in the GL state tracker, not the poor
driver.
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There are many different names for constants in mesa, we were missing
one since the ureg rewrite.
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To avoid breaking the gallium's builtin malloc debugging.
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Should be easier to read and work with than the older ways of emitting
TGSI tokens.
Also, emit simpler TGSI than previously:
- translate away source and dest extended modifiers
- translate away the SWZ opcode
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Never set in mesa. Remove from tgsi translation as well.
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This branch introduces new FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC fragment
program inputs for GLSL gl_FrontFacing and gl_PointCoord. Before, these
attributes were packed with the FOG attribute. That made things
complicated elsewhere.
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The LOOP/ENDLOOP pair is renamed to BGNFOR/ENDFOR as its behaviour
is similar to a C language for-loop.
The BGNLOOP2/ENDLOOP2 pair is renamed to BGNLOOP/ENDLOOP as now
there is no name collision.
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Previously, the FOGC attribute contained the fragment fog coord, front/back-
face flag and the gl_PointCoord.xy values. Now each of those things are
separate fragment program attributes. This simplifies quite a few things in
Mesa and gallium.
Need to test i965 driver and fix up point coord handling in the gallium/draw
module...
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When sampling a 2D shadow map we need 3 texcoord components, not 2.
The third component (distance from light source) is compared against
the texture sample to return the result (visible vs. occluded).
Also, enable proper handling of TGSI_TEXTURE_SHADOW targets in Mesa->TGSI
translation. There's a possibility for breakage in gallium drivers if
they fail to handle the TGSI_TEXTURE_SHADOW1D / TGSI_TEXTURE_SHADOW2D /
TGSI_TEXTURE_SHADOWRECT texture targets for TGSI_OPCODE_TEX/TXP instructions,
but that should be easy to fix.
With these changes, progs/demos/shadowtex.c renders properly again with
softpipe.
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Remove the need to have a pointer in this struct by just including
the immediate data inline. Having a pointer in the struct introduces
complications like needing to alloc/free the data pointed to, uncertainty
about who owns the data, etc. There doesn't seem to be a need for it,
and it is unlikely to make much difference plus or minus to performance.
Added some asserts as we now will trip up on immediates with more
than four elements. There were actually already quite a few such asserts,
but the >4 case could be used in the future to specify indexable immediate
ranges, such as lookup tables.
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fix the cases when fog coord/front face/point coord are used in the same
shader.
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mesa allocates both frontface and pointcoord registers within the fog
coordinate register, by using swizzling. to make it cleaner and easier
for drivers we want each of them in its own register. so when doing
compilation from the mesa IR to tgsi allocate new registers for both
and add new semantics to the respective declarations.
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There's really no need for two negation fields. This came from the
GL_NV_fragment_program extension. The new, unified Negate bitfield applies
after the absolute value step.
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This was used to indicate OpenGL's lower-left origin for fragment window
coordinates for polygon stipple and gl_FragCoord.
Now:
- fragment coordinate origin is always upper-left corner
- GL polygon stipple is inverted and shifted before given to gallium
- GL fragment programs that use INPUT[WPOS] are modified to use an
inverted window coord which is placed in a temp register.
Note: the origin_lower_left field still exists in pipe_rasterizer_state.
Remove it when all the drivers, etc. no longer reference it.
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instructions
These texture types were defined but never put to use.
For the time being though, the Mesa->TGSI translater isn't emitting these
targets. See the XXX comment in map_texture_target().
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The debug functions depend on several util function for os abstractions, and
these depend on debug functions, so a seperate module is not possible.
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Conflicts:
src/gallium/winsys/gdi/SConscript
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indirect addressing used.
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