diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c index 7ce5fb8639..09cb8b27f6 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c @@ -71,6 +71,39 @@ static void scale_texcoords(struct r300_fragment_program_compiler *compiler, inst->U.I.SrcReg[0].Index = temp; } +static void projective_divide(struct r300_fragment_program_compiler *compiler, + struct rc_instruction *inst) +{ + struct rc_instruction *inst_mul, *inst_rcp; + + unsigned temp = rc_find_free_temporary(&compiler->Base); + + inst_rcp = rc_insert_new_instruction(&compiler->Base, inst->Prev); + inst_rcp->U.I.Opcode = RC_OPCODE_RCP; + inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_rcp->U.I.DstReg.Index = temp; + inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W; + inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + /* Because the input can be arbitrarily swizzled, + * read the component mapped to W. */ + inst_rcp->U.I.SrcReg[0].Swizzle = + RC_MAKE_SWIZZLE_SMEAR(GET_SWZ(inst->U.I.SrcReg[0].Swizzle, 3)); + + inst_mul = rc_insert_new_instruction(&compiler->Base, inst->Prev); + inst_mul->U.I.Opcode = RC_OPCODE_MUL; + inst_mul->U.I.DstReg.File = RC_FILE_TEMPORARY; + inst_mul->U.I.DstReg.Index = temp; + inst_mul->U.I.SrcReg[0] = inst->U.I.SrcReg[0]; + inst_mul->U.I.SrcReg[1].File = RC_FILE_TEMPORARY; + inst_mul->U.I.SrcReg[1].Index = temp; + inst_mul->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW; + + reset_srcreg(&inst->U.I.SrcReg[0]); + inst->U.I.Opcode = RC_OPCODE_TEX; + inst->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + inst->U.I.SrcReg[0].Index = temp; +} + /** * Transform TEX, TXP, TXB, and KIL instructions in the following ways: * - implement texture compare (shadow extensions) @@ -216,6 +249,12 @@ int radeonTransformTEX( inst->U.I.TexSrcTarget = RC_TEXTURE_2D; } + /* Divide by W if needed. */ + if (inst->U.I.Opcode == RC_OPCODE_TXP && + (wrapmode == RC_WRAP_REPEAT || wrapmode == RC_WRAP_MIRRORED_REPEAT)) { + projective_divide(compiler, inst); + } + /* Texture wrap modes don't work on NPOT textures. * * Non-wrapped/clamped texcoords with NPOT are free in HW. Repeat and |