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radeon/llvm: fix shadow cube texturing for GL3.0

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The fix is at the end (TGSI_TEXTURE_SHADOWCUBE handling), but I also
restructured the code for it to be more readable.

Fixes spec/!OpenGL 3.0/sampler-cube-shadow.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
This commit is contained in:
Marek Olšák 2013-09-24 19:28:27 +02:00
parent 57f38e9f92
commit 028b26e2ef
1 changed files with 15 additions and 23 deletions
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38
src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
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@ -633,31 +633,23 @@ void radeon_llvm_emit_prepare_cube_coords(
coords[1] = coords[0];
coords[0] = coords[3];
/* all cases except simple cube map sampling require special handling
* for coord vector */
if (target != TGSI_TEXTURE_CUBE ||
opcode != TGSI_OPCODE_TEX) {
if (target == TGSI_TEXTURE_CUBE_ARRAY ||
target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) {
/* for cube arrays coord.z = coord.w(array_index) * 8 + face */
if (target == TGSI_TEXTURE_CUBE_ARRAY ||
target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) {
/* coords_arg.w component - array_index for cube arrays */
coords[2] = lp_build_emit_llvm_ternary(bld_base, TGSI_OPCODE_MAD,
coords_arg[3], lp_build_const_float(gallivm, 8.0), coords[2]);
}
/* coords_arg.w component - array_index for cube arrays or
* compare value for SHADOWCUBE */
coords[2] = lp_build_emit_llvm_ternary(bld_base, TGSI_OPCODE_MAD,
coords_arg[3], lp_build_const_float(gallivm, 8.0), coords[2]);
}
/* for instructions that need additional src (compare/lod/bias),
* put it in coord.w */
if (opcode == TGSI_OPCODE_TEX2 ||
opcode == TGSI_OPCODE_TXB2 ||
opcode == TGSI_OPCODE_TXL2) {
coords[3] = coords_arg[4];
} else if (opcode == TGSI_OPCODE_TXB ||
opcode == TGSI_OPCODE_TXL) {
coords[3] = coords_arg[3];
}
/* Preserve compare/lod/bias. Put it in coords.w. */
if (opcode == TGSI_OPCODE_TEX2 ||
opcode == TGSI_OPCODE_TXB2 ||
opcode == TGSI_OPCODE_TXL2) {
coords[3] = coords_arg[4];
} else if (opcode == TGSI_OPCODE_TXB ||
opcode == TGSI_OPCODE_TXL ||
target == TGSI_TEXTURE_SHADOWCUBE) {
coords[3] = coords_arg[3];
}
memcpy(coords_arg, coords, sizeof(coords));