diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/r300_fragprog_common.c')
| -rw-r--r-- | src/mesa/drivers/dri/r300/r300_fragprog_common.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog_common.c b/src/mesa/drivers/dri/r300/r300_fragprog_common.c index c7914649dd..f5c4c0f4a0 100644 --- a/src/mesa/drivers/dri/r300/r300_fragprog_common.c +++ b/src/mesa/drivers/dri/r300/r300_fragprog_common.c @@ -162,6 +162,14 @@ static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler) } } + +/** + * Rewrite fragment.fogcoord to use a texture coordinate slot. + * Note that fogcoord is forced into an X001 pattern, and this enforcement + * is done here. + * + * See also the counterpart rewriting for vertex programs. + */ static void rewriteFog(struct r300_fragment_program_compiler *compiler) { struct r300_fragment_program *fp = compiler->fp; @@ -193,8 +201,12 @@ static void rewriteFog(struct r300_fragment_program_compiler *compiler) while (inst->Opcode != OPCODE_END) { const int src_regs = _mesa_num_inst_src_regs(inst->Opcode); for (i = 0; i < src_regs; ++i) { - if (inst->SrcReg[i].File == PROGRAM_INPUT && inst->SrcReg[i].Index == FRAG_ATTRIB_FOGC) + if (inst->SrcReg[i].File == PROGRAM_INPUT && inst->SrcReg[i].Index == FRAG_ATTRIB_FOGC) { inst->SrcReg[i].Index = fp->fog_attr; + inst->SrcReg[i].Swizzle = combine_swizzles( + MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ONE), + inst->SrcReg[i].Swizzle); + } } ++inst; } |