diff options
Diffstat (limited to 'src/gallium/auxiliary/tgsi')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_emulate.c | 168 | ||||
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_emulate.h | 38 |
2 files changed, 206 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_emulate.c b/src/gallium/auxiliary/tgsi/tgsi_emulate.c new file mode 100644 index 00000000000..819087261b3 --- /dev/null +++ b/src/gallium/auxiliary/tgsi/tgsi_emulate.c @@ -0,0 +1,168 @@ +/* + * Copyright (C) 2015 Advanced Micro Devices, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + */ + +#include "tgsi/tgsi_transform.h" +#include "tgsi/tgsi_scan.h" +#include "tgsi/tgsi_dump.h" +#include "util/u_debug.h" + +#include "tgsi_emulate.h" + +struct tgsi_emulation_context { + struct tgsi_transform_context base; + struct tgsi_shader_info info; + unsigned flags; + bool first_instruction_emitted; +}; + +static inline struct tgsi_emulation_context * +tgsi_emulation_context(struct tgsi_transform_context *tctx) +{ + return (struct tgsi_emulation_context *)tctx; +} + +static void +transform_decl(struct tgsi_transform_context *tctx, + struct tgsi_full_declaration *decl) +{ + struct tgsi_emulation_context *ctx = tgsi_emulation_context(tctx); + + if (ctx->flags & TGSI_EMU_FORCE_PERSAMPLE_INTERP && + decl->Declaration.File == TGSI_FILE_INPUT) { + assert(decl->Declaration.Interpolate); + decl->Interp.Location = TGSI_INTERPOLATE_LOC_SAMPLE; + } + + tctx->emit_declaration(tctx, decl); +} + +static void +passthrough_edgeflag(struct tgsi_transform_context *tctx) +{ + struct tgsi_emulation_context *ctx = tgsi_emulation_context(tctx); + struct tgsi_full_declaration decl; + struct tgsi_full_instruction new_inst; + + /* Input */ + decl = tgsi_default_full_declaration(); + decl.Declaration.File = TGSI_FILE_INPUT; + decl.Range.First = decl.Range.Last = ctx->info.num_inputs; + tctx->emit_declaration(tctx, &decl); + + /* Output */ + decl = tgsi_default_full_declaration(); + decl.Declaration.File = TGSI_FILE_OUTPUT; + decl.Declaration.Semantic = true; + decl.Range.First = decl.Range.Last = ctx->info.num_outputs; + decl.Semantic.Name = TGSI_SEMANTIC_EDGEFLAG; + decl.Semantic.Index = 0; + tctx->emit_declaration(tctx, &decl); + + /* MOV */ + new_inst = tgsi_default_full_instruction(); + new_inst.Instruction.Opcode = TGSI_OPCODE_MOV; + + new_inst.Instruction.NumDstRegs = 1; + new_inst.Dst[0].Register.File = TGSI_FILE_OUTPUT; + new_inst.Dst[0].Register.Index = ctx->info.num_outputs; + new_inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW; + + new_inst.Instruction.NumSrcRegs = 1; + new_inst.Src[0].Register.File = TGSI_FILE_INPUT; + new_inst.Src[0].Register.Index = ctx->info.num_inputs; + new_inst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_X; + new_inst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_X; + new_inst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_X; + new_inst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_X; + + tctx->emit_instruction(tctx, &new_inst); +} + +static void +transform_instr(struct tgsi_transform_context *tctx, + struct tgsi_full_instruction *inst) +{ + struct tgsi_emulation_context *ctx = tgsi_emulation_context(tctx); + + /* Pass through edgeflags. */ + if (!ctx->first_instruction_emitted) { + ctx->first_instruction_emitted = true; + + if (ctx->flags & TGSI_EMU_PASSTHROUGH_EDGEFLAG) + passthrough_edgeflag(tctx); + } + + /* Clamp color outputs. */ + if (ctx->flags & TGSI_EMU_CLAMP_COLOR_OUTPUTS) { + for (int i = 0; i < inst->Instruction.NumDstRegs; i++) { + unsigned semantic; + + if (inst->Dst[i].Register.File != TGSI_FILE_OUTPUT || + inst->Dst[i].Register.Indirect) + continue; + + semantic = + ctx->info.output_semantic_name[inst->Dst[i].Register.Index]; + + if (semantic == TGSI_SEMANTIC_COLOR || + semantic == TGSI_SEMANTIC_BCOLOR) + inst->Instruction.Saturate = true; + } + } + + tctx->emit_instruction(tctx, inst); +} + +const struct tgsi_token * +tgsi_emulate(const struct tgsi_token *tokens, unsigned flags) +{ + struct tgsi_emulation_context ctx; + struct tgsi_token *newtoks; + int newlen; + + if (!(flags & (TGSI_EMU_CLAMP_COLOR_OUTPUTS | + TGSI_EMU_PASSTHROUGH_EDGEFLAG | + TGSI_EMU_FORCE_PERSAMPLE_INTERP))) + return NULL; + + memset(&ctx, 0, sizeof(ctx)); + ctx.flags = flags; + tgsi_scan_shader(tokens, &ctx.info); + + if (flags & TGSI_EMU_FORCE_PERSAMPLE_INTERP) + ctx.base.transform_declaration = transform_decl; + + if (flags & (TGSI_EMU_CLAMP_COLOR_OUTPUTS | + TGSI_EMU_PASSTHROUGH_EDGEFLAG)) + ctx.base.transform_instruction = transform_instr; + + newlen = tgsi_num_tokens(tokens) + 20; + newtoks = tgsi_alloc_tokens(newlen); + if (!newtoks) + return NULL; + + tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base); + return newtoks; +} diff --git a/src/gallium/auxiliary/tgsi/tgsi_emulate.h b/src/gallium/auxiliary/tgsi/tgsi_emulate.h new file mode 100644 index 00000000000..425cec72ee1 --- /dev/null +++ b/src/gallium/auxiliary/tgsi/tgsi_emulate.h @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2015 Advanced Micro Devices, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + */ + +#ifndef TGSI_GL_EMULATION_H_ +#define TGSI_GL_EMULATION_H_ + +#include "pipe/p_shader_tokens.h" + +#define TGSI_EMU_CLAMP_COLOR_OUTPUTS (1 << 0) +#define TGSI_EMU_PASSTHROUGH_EDGEFLAG (1 << 1) +#define TGSI_EMU_FORCE_PERSAMPLE_INTERP (1 << 2) + +const struct tgsi_token * +tgsi_emulate(const struct tgsi_token *tokens, unsigned flags); + +#endif /* TGSI_GL_EMULATION_H_ */ |