draw: use tgsi transform prolog callback in polygon stipple code
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul
@@ -129,7 +129,6 @@ struct pstip_transform_context {
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int freeSampler; /** an available sampler for the pstipple */
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int texTemp; /**< temp registers */
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int numImmed;
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boolean firstInstruction;
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};
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@@ -192,147 +191,134 @@ free_bit(uint bitfield)
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/**
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* TGSI instruction transform callback.
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* Replace writes to result.color w/ a temp reg.
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* Upon END instruction, insert texture sampling code for antialiasing.
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* TGSI transform prolog callback.
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*/
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static void
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pstip_transform_inst(struct tgsi_transform_context *ctx,
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struct tgsi_full_instruction *inst)
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pstip_transform_prolog(struct tgsi_transform_context *ctx)
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{
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struct pstip_transform_context *pctx = (struct pstip_transform_context *) ctx;
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struct tgsi_full_declaration decl;
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struct tgsi_full_instruction newInst;
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uint i;
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int wincoordInput;
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if (pctx->firstInstruction) {
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/* emit our new declarations before the first instruction */
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/* find free sampler */
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pctx->freeSampler = free_bit(pctx->samplersUsed);
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if (pctx->freeSampler >= PIPE_MAX_SAMPLERS)
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pctx->freeSampler = PIPE_MAX_SAMPLERS - 1;
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struct tgsi_full_declaration decl;
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struct tgsi_full_instruction newInst;
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uint i;
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int wincoordInput;
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if (pctx->wincoordInput < 0)
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wincoordInput = pctx->maxInput + 1;
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else
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wincoordInput = pctx->wincoordInput;
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/* find free sampler */
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pctx->freeSampler = free_bit(pctx->samplersUsed);
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if (pctx->freeSampler >= PIPE_MAX_SAMPLERS)
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pctx->freeSampler = PIPE_MAX_SAMPLERS - 1;
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if (pctx->wincoordInput < 0)
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wincoordInput = pctx->maxInput + 1;
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/* find one free temp reg */
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for (i = 0; i < 32; i++) {
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if ((pctx->tempsUsed & (1 << i)) == 0) {
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/* found a free temp */
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if (pctx->texTemp < 0)
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pctx->texTemp = i;
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else
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wincoordInput = pctx->wincoordInput;
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/* find one free temp reg */
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for (i = 0; i < 32; i++) {
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if ((pctx->tempsUsed & (1 << i)) == 0) {
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/* found a free temp */
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if (pctx->texTemp < 0)
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pctx->texTemp = i;
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else
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break;
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}
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break;
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}
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assert(pctx->texTemp >= 0);
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}
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assert(pctx->texTemp >= 0);
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if (pctx->wincoordInput < 0) {
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/* declare new position input reg */
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decl = tgsi_default_full_declaration();
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decl.Declaration.File = TGSI_FILE_INPUT;
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decl.Declaration.Interpolate = 1;
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decl.Declaration.Semantic = 1;
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decl.Semantic.Name = TGSI_SEMANTIC_POSITION;
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decl.Semantic.Index = 0;
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decl.Range.First =
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decl.Range.Last = wincoordInput;
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decl.Interp.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */
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ctx->emit_declaration(ctx, &decl);
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}
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/* declare new sampler */
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if (pctx->wincoordInput < 0) {
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/* declare new position input reg */
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decl = tgsi_default_full_declaration();
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decl.Declaration.File = TGSI_FILE_SAMPLER;
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decl.Declaration.File = TGSI_FILE_INPUT;
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decl.Declaration.Interpolate = 1;
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decl.Declaration.Semantic = 1;
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decl.Semantic.Name = TGSI_SEMANTIC_POSITION;
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decl.Semantic.Index = 0;
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decl.Range.First =
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decl.Range.Last = pctx->freeSampler;
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decl.Range.Last = wincoordInput;
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decl.Interp.Interpolate = TGSI_INTERPOLATE_LINEAR; /* XXX? */
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ctx->emit_declaration(ctx, &decl);
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/* declare new temp regs */
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decl = tgsi_default_full_declaration();
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decl.Declaration.File = TGSI_FILE_TEMPORARY;
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decl.Range.First =
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decl.Range.Last = pctx->texTemp;
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ctx->emit_declaration(ctx, &decl);
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/* emit immediate = {1/32, 1/32, 1, 1}
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* The index/position of this immediate will be pctx->numImmed
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*/
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{
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static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
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struct tgsi_full_immediate immed;
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uint size = 4;
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immed = tgsi_default_full_immediate();
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immed.Immediate.NrTokens = 1 + size; /* one for the token itself */
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immed.u[0].Float = value[0];
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immed.u[1].Float = value[1];
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immed.u[2].Float = value[2];
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immed.u[3].Float = value[3];
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ctx->emit_immediate(ctx, &immed);
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}
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pctx->firstInstruction = FALSE;
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/*
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* Insert new MUL/TEX/KILL_IF instructions at start of program
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* Take gl_FragCoord, divide by 32 (stipple size), sample the
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* texture and kill fragment if needed.
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*
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* We'd like to use non-normalized texcoords to index into a RECT
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* texture, but we can only use GL_REPEAT wrap mode with normalized
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* texcoords. Darn.
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*/
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/* MUL texTemp, INPUT[wincoord], 1/32; */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_MUL;
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newInst.Instruction.NumDstRegs = 1;
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newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Dst[0].Register.Index = pctx->texTemp;
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newInst.Instruction.NumSrcRegs = 2;
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newInst.Src[0].Register.File = TGSI_FILE_INPUT;
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newInst.Src[0].Register.Index = wincoordInput;
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newInst.Src[1].Register.File = TGSI_FILE_IMMEDIATE;
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newInst.Src[1].Register.Index = pctx->numImmed;
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ctx->emit_instruction(ctx, &newInst);
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/* TEX texTemp, texTemp, sampler; */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_TEX;
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newInst.Instruction.NumDstRegs = 1;
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newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Dst[0].Register.Index = pctx->texTemp;
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newInst.Instruction.NumSrcRegs = 2;
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newInst.Instruction.Texture = TRUE;
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newInst.Texture.Texture = TGSI_TEXTURE_2D;
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newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Src[0].Register.Index = pctx->texTemp;
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newInst.Src[1].Register.File = TGSI_FILE_SAMPLER;
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newInst.Src[1].Register.Index = pctx->freeSampler;
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ctx->emit_instruction(ctx, &newInst);
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/* KILL_IF -texTemp; # if -texTemp < 0, KILL fragment */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_KILL_IF;
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newInst.Instruction.NumDstRegs = 0;
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newInst.Instruction.NumSrcRegs = 1;
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newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Src[0].Register.Index = pctx->texTemp;
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newInst.Src[0].Register.Negate = 1;
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ctx->emit_instruction(ctx, &newInst);
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}
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/* emit this instruction */
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ctx->emit_instruction(ctx, inst);
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/* declare new sampler */
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decl = tgsi_default_full_declaration();
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decl.Declaration.File = TGSI_FILE_SAMPLER;
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decl.Range.First =
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decl.Range.Last = pctx->freeSampler;
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ctx->emit_declaration(ctx, &decl);
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/* declare new temp regs */
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decl = tgsi_default_full_declaration();
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decl.Declaration.File = TGSI_FILE_TEMPORARY;
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decl.Range.First =
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decl.Range.Last = pctx->texTemp;
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ctx->emit_declaration(ctx, &decl);
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/* emit immediate = {1/32, 1/32, 1, 1}
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* The index/position of this immediate will be pctx->numImmed
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*/
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{
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static const float value[4] = { 1.0/32, 1.0/32, 1.0, 1.0 };
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struct tgsi_full_immediate immed;
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uint size = 4;
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immed = tgsi_default_full_immediate();
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immed.Immediate.NrTokens = 1 + size; /* one for the token itself */
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immed.u[0].Float = value[0];
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immed.u[1].Float = value[1];
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immed.u[2].Float = value[2];
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immed.u[3].Float = value[3];
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ctx->emit_immediate(ctx, &immed);
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}
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/*
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* Insert new MUL/TEX/KILL_IF instructions at start of program
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* Take gl_FragCoord, divide by 32 (stipple size), sample the
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* texture and kill fragment if needed.
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*
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* We'd like to use non-normalized texcoords to index into a RECT
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* texture, but we can only use GL_REPEAT wrap mode with normalized
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* texcoords. Darn.
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*/
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/* MUL texTemp, INPUT[wincoord], 1/32; */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_MUL;
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newInst.Instruction.NumDstRegs = 1;
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newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Dst[0].Register.Index = pctx->texTemp;
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newInst.Instruction.NumSrcRegs = 2;
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newInst.Src[0].Register.File = TGSI_FILE_INPUT;
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newInst.Src[0].Register.Index = wincoordInput;
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newInst.Src[1].Register.File = TGSI_FILE_IMMEDIATE;
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newInst.Src[1].Register.Index = pctx->numImmed;
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ctx->emit_instruction(ctx, &newInst);
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/* TEX texTemp, texTemp, sampler; */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_TEX;
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newInst.Instruction.NumDstRegs = 1;
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newInst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Dst[0].Register.Index = pctx->texTemp;
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newInst.Instruction.NumSrcRegs = 2;
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newInst.Instruction.Texture = TRUE;
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newInst.Texture.Texture = TGSI_TEXTURE_2D;
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newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Src[0].Register.Index = pctx->texTemp;
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newInst.Src[1].Register.File = TGSI_FILE_SAMPLER;
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newInst.Src[1].Register.Index = pctx->freeSampler;
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ctx->emit_instruction(ctx, &newInst);
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/* KILL_IF -texTemp; # if -texTemp < 0, KILL fragment */
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newInst = tgsi_default_full_instruction();
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newInst.Instruction.Opcode = TGSI_OPCODE_KILL_IF;
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newInst.Instruction.NumDstRegs = 0;
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newInst.Instruction.NumSrcRegs = 1;
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newInst.Src[0].Register.File = TGSI_FILE_TEMPORARY;
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newInst.Src[0].Register.Index = pctx->texTemp;
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newInst.Src[0].Register.Negate = 1;
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ctx->emit_instruction(ctx, &newInst);
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}
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/**
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* Generate the frag shader we'll use for doing polygon stipple.
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* This will be the user's shader prefixed with a TEX and KIL instruction.
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@@ -355,8 +341,7 @@ generate_pstip_fs(struct pstip_stage *pstip)
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transform.wincoordInput = -1;
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transform.maxInput = -1;
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transform.texTemp = -1;
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transform.firstInstruction = TRUE;
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transform.base.transform_instruction = pstip_transform_inst;
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transform.base.prolog = pstip_transform_prolog;
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transform.base.transform_declaration = pstip_transform_decl;
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transform.base.transform_immediate = pstip_transform_immed;
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