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svga: add support for interpolation at sample position 

Vs. sampling at the centroid or the fragment center.

Note that this does not fix failures with the Piglit
arb_sample_shading-interpolate-at-sample-position or
arb_sample_shading-ignore-centroid-qualifier.exe tests at this time.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul 2017-07-31 21:12:07 -06:00
parent bcf7aaa9f7
commit 36c84bcd77
1 changed files with 21 additions and 7 deletions
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28
src/gallium/drivers/svga/svga_tgsi_vgpu10.c
View File

@ -1958,13 +1958,25 @@ translate_interpolation(const struct svga_shader_emitter_v10 *emit,
case TGSI_INTERPOLATE_CONSTANT:
return VGPU10_INTERPOLATION_CONSTANT;
case TGSI_INTERPOLATE_LINEAR:
return interpolate_loc == TGSI_INTERPOLATE_LOC_CENTROID ?
VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_CENTROID :
VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE;
if (interpolate_loc == TGSI_INTERPOLATE_LOC_CENTROID) {
return VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_CENTROID;
} else if (interpolate_loc == TGSI_INTERPOLATE_LOC_SAMPLE &&
emit->version >= 41) {
return VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_SAMPLE;
} else {
return VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE;
}
break;
case TGSI_INTERPOLATE_PERSPECTIVE:
return interpolate_loc == TGSI_INTERPOLATE_LOC_CENTROID ?
VGPU10_INTERPOLATION_LINEAR_CENTROID :
VGPU10_INTERPOLATION_LINEAR;
if (interpolate_loc == TGSI_INTERPOLATE_LOC_CENTROID) {
return VGPU10_INTERPOLATION_LINEAR_CENTROID;
} else if (interpolate_loc == TGSI_INTERPOLATE_LOC_SAMPLE &&
emit->version >= 41) {
return VGPU10_INTERPOLATION_LINEAR_SAMPLE;
} else {
return VGPU10_INTERPOLATION_LINEAR;
}
break;
default:
assert(!"Unexpected interpolation mode");
return VGPU10_INTERPOLATION_CONSTANT;
@ -2192,7 +2204,9 @@ emit_input_declaration(struct svga_shader_emitter_v10 *emit,
interpMode == VGPU10_INTERPOLATION_LINEAR ||
interpMode == VGPU10_INTERPOLATION_LINEAR_CENTROID ||
interpMode == VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE ||
interpMode == VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_CENTROID);
interpMode == VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_CENTROID ||
interpMode == VGPU10_INTERPOLATION_LINEAR_SAMPLE ||
interpMode == VGPU10_INTERPOLATION_LINEAR_NOPERSPECTIVE_SAMPLE);
check_register_index(emit, opcodeType, index);