diff options
| author | Luca Barbieri <luca@luca-barbieri.com> | 2010-09-05 06:42:04 +0200 |
|---|---|---|
| committer | Luca Barbieri <luca@luca-barbieri.com> | 2010-09-05 17:52:25 +0200 |
| commit | 14d58052354cdd72fadabaeb1ae1be2d45d2a5ca (patch) | |
| tree | f4ccf273ee9e9914935269d1ec7fc2a185c9c25b /src/gallium/drivers/nvfx | |
| parent | 76f696b1f63cd3c5f2c4dcdfa91b93d4b5a80dbe (diff) | |
nvfx: properly return fogcoord.w == 1
Hardware sets it to 0, so we add an ADD to put an 1 there if the
application really wants the alpha channel.
Diffstat (limited to 'src/gallium/drivers/nvfx')
| -rw-r--r-- | src/gallium/drivers/nvfx/nvfx_fragprog.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/gallium/drivers/nvfx/nvfx_fragprog.c b/src/gallium/drivers/nvfx/nvfx_fragprog.c index 86df7f0049..23121ebe1e 100644 --- a/src/gallium/drivers/nvfx/nvfx_fragprog.c +++ b/src/gallium/drivers/nvfx/nvfx_fragprog.c @@ -493,7 +493,21 @@ nvfx_fragprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_fpc *fpc, switch (fsrc->Register.File) { case TGSI_FILE_INPUT: - if (ai == -1 || ai == fsrc->Register.Index) { + if(fpc->pfp->info.input_semantic_name[fsrc->Register.Index] == TGSI_SEMANTIC_FOG && (0 + || fsrc->Register.SwizzleX == PIPE_SWIZZLE_ALPHA + || fsrc->Register.SwizzleY == PIPE_SWIZZLE_ALPHA + || fsrc->Register.SwizzleZ == PIPE_SWIZZLE_ALPHA + || fsrc->Register.SwizzleW == PIPE_SWIZZLE_ALPHA + )) { + /* hardware puts 0 in fogcoord.w, but GL/Gallium want 1 there */ + struct nvfx_src addend = nvfx_src(nvfx_fp_imm(fpc, 0, 0, 0, 1)); + addend.swz[0] = fsrc->Register.SwizzleX; + addend.swz[1] = fsrc->Register.SwizzleY; + addend.swz[2] = fsrc->Register.SwizzleZ; + addend.swz[3] = fsrc->Register.SwizzleW; + src[i] = nvfx_src(temp(fpc)); + nvfx_fp_emit(fpc, arith(0, ADD, src[i].reg, NVFX_FP_MASK_ALL, tgsi_src(fpc, fsrc), addend, none)); + } else if (ai == -1 || ai == fsrc->Register.Index) { ai = fsrc->Register.Index; src[i] = tgsi_src(fpc, fsrc); } else { |