diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/r300_fragprog.c')
| -rw-r--r-- | src/mesa/drivers/dri/r300/r300_fragprog.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog.c b/src/mesa/drivers/dri/r300/r300_fragprog.c index 94cb11afec..4c6289298e 100644 --- a/src/mesa/drivers/dri/r300/r300_fragprog.c +++ b/src/mesa/drivers/dri/r300/r300_fragprog.c @@ -50,6 +50,130 @@ #include "r300_state.h" +static void reset_srcreg(struct prog_src_register* reg) +{ + _mesa_bzero(reg, sizeof(*reg)); + reg->Swizzle = SWIZZLE_NOOP; +} + +/** + * Transform TEX, TXP, TXB, and KIL instructions in the following way: + * - premultiply texture coordinates for RECT + * - extract operand swizzles + * - introduce a temporary register when write masks are needed + * + * \todo If/when r5xx uses the radeon_program architecture, this can probably + * be reused. + */ +static GLboolean transform_TEX( + struct radeon_program_transform_context* context, + struct prog_instruction* orig_inst, void* data) +{ + struct r300_fragment_program_compiler *compiler = + (struct r300_fragment_program_compiler*)data; + struct prog_instruction inst = *orig_inst; + struct prog_instruction* tgt; + GLboolean destredirect = GL_FALSE; + + if (inst.Opcode != OPCODE_TEX && + inst.Opcode != OPCODE_TXB && + inst.Opcode != OPCODE_TXP && + inst.Opcode != OPCODE_KIL) + return GL_FALSE; + + /* Hardware uses [0..1]x[0..1] range for rectangle textures + * instead of [0..Width]x[0..Height]. + * Add a scaling instruction. + */ + if (inst.Opcode != OPCODE_KIL && inst.TexSrcTarget == TEXTURE_RECT_INDEX) { + gl_state_index tokens[STATE_LENGTH] = { + STATE_INTERNAL, STATE_R300_TEXRECT_FACTOR, 0, 0, + 0 + }; + + int tempreg = radeonCompilerAllocateTemporary(context->compiler); + int factor_index; + + tokens[2] = inst.TexSrcUnit; + factor_index = + _mesa_add_state_reference( + compiler->fp->mesa_program.Base.Parameters, tokens); + + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 1); + + tgt->Opcode = OPCODE_MAD; + tgt->DstReg.File = PROGRAM_TEMPORARY; + tgt->DstReg.Index = tempreg; + tgt->SrcReg[0] = inst.SrcReg[0]; + tgt->SrcReg[1].File = PROGRAM_STATE_VAR; + tgt->SrcReg[1].Index = factor_index; + tgt->SrcReg[2].File = PROGRAM_BUILTIN; + tgt->SrcReg[2].Swizzle = SWIZZLE_0000; + + reset_srcreg(&inst.SrcReg[0]); + inst.SrcReg[0].File = PROGRAM_TEMPORARY; + inst.SrcReg[0].Index = tempreg; + } + + /* Texture operations do not support swizzles etc. in hardware, + * so emit an additional arithmetic operation if necessary. + */ + if (inst.SrcReg[0].Swizzle != SWIZZLE_NOOP || + inst.SrcReg[0].Abs || inst.SrcReg[0].NegateBase || inst.SrcReg[0].NegateAbs) { + int tempreg = radeonCompilerAllocateTemporary(context->compiler); + + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 1); + + tgt->Opcode = OPCODE_MAD; + tgt->DstReg.File = PROGRAM_TEMPORARY; + tgt->DstReg.Index = tempreg; + tgt->SrcReg[0] = inst.SrcReg[0]; + tgt->SrcReg[1].File = PROGRAM_BUILTIN; + tgt->SrcReg[1].Swizzle = SWIZZLE_1111; + tgt->SrcReg[2].File = PROGRAM_BUILTIN; + tgt->SrcReg[2].Swizzle = SWIZZLE_0000; + + reset_srcreg(&inst.SrcReg[0]); + inst.SrcReg[0].File = PROGRAM_TEMPORARY; + inst.SrcReg[0].Index = tempreg; + } + + if (inst.Opcode != OPCODE_KIL) { + if (inst.DstReg.File != PROGRAM_TEMPORARY || + inst.DstReg.WriteMask != WRITEMASK_XYZW) { + int tempreg = radeonCompilerAllocateTemporary(context->compiler); + + inst.DstReg.File = PROGRAM_TEMPORARY; + inst.DstReg.Index = tempreg; + inst.DstReg.WriteMask = WRITEMASK_XYZW; + destredirect = GL_TRUE; + } + } + + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 1); + _mesa_copy_instructions(tgt, &inst, 1); + + if (destredirect) { + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 1); + + tgt->Opcode = OPCODE_MAD; + tgt->DstReg = orig_inst->DstReg; + tgt->SrcReg[0].File = PROGRAM_TEMPORARY; + tgt->SrcReg[0].Index = inst.DstReg.Index; + tgt->SrcReg[1].File = PROGRAM_BUILTIN; + tgt->SrcReg[1].Swizzle = SWIZZLE_1111; + tgt->SrcReg[2].File = PROGRAM_BUILTIN; + tgt->SrcReg[2].Swizzle = SWIZZLE_0000; + } + + return GL_TRUE; +} + + static void update_params(r300ContextPtr r300, struct r300_fragment_program *fp) { struct gl_fragment_program *mp = &fp->mesa_program; @@ -170,6 +294,13 @@ void r300TranslateFragmentShader(r300ContextPtr r300, insert_WPOS_trailer(&compiler); + struct radeon_program_transformation transformations[1] = { + { &transform_TEX, &compiler } + }; + radeonClauseLocalTransform(&compiler.compiler, + &compiler.compiler.Clauses[0], + 1, transformations); + if (!r300FragmentProgramEmit(&compiler)) fp->error = GL_TRUE; |