| /************************************************************************** |
| * |
| * Copyright (C) 2015 Advanced Micro Devices, Inc. |
| * Copyright 2007 VMware, 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, sub license, 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 NON-INFRINGEMENT. |
| * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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 "st_cb_bitmap.h" |
| #include "tgsi/tgsi_transform.h" |
| #include "tgsi/tgsi_scan.h" |
| #include "tgsi/tgsi_dump.h" |
| #include "util/u_debug.h" |
| |
| struct tgsi_bitmap_transform { |
| struct tgsi_transform_context base; |
| struct tgsi_shader_info info; |
| unsigned sampler_index; |
| unsigned tex_target; |
| bool use_texcoord; |
| bool swizzle_xxxx; |
| bool first_instruction_emitted; |
| }; |
| |
| static inline struct tgsi_bitmap_transform * |
| tgsi_bitmap_transform(struct tgsi_transform_context *tctx) |
| { |
| return (struct tgsi_bitmap_transform *)tctx; |
| } |
| |
| static void |
| transform_instr(struct tgsi_transform_context *tctx, |
| struct tgsi_full_instruction *current_inst) |
| { |
| struct tgsi_bitmap_transform *ctx = tgsi_bitmap_transform(tctx); |
| struct tgsi_full_instruction inst; |
| unsigned tgsi_tex_target = ctx->tex_target == PIPE_TEXTURE_2D |
| ? TGSI_TEXTURE_2D : TGSI_TEXTURE_RECT; |
| unsigned i, semantic; |
| int texcoord_index = -1; |
| |
| if (ctx->first_instruction_emitted) { |
| tctx->emit_instruction(tctx, current_inst); |
| return; |
| } |
| |
| ctx->first_instruction_emitted = true; |
| |
| /* Add TEMP[0] if it's missing. */ |
| if (ctx->info.file_max[TGSI_FILE_TEMPORARY] == -1) { |
| tgsi_transform_temp_decl(tctx, 0); |
| } |
| |
| /* Add TEXCOORD[0] if it's missing. */ |
| semantic = ctx->use_texcoord ? TGSI_SEMANTIC_TEXCOORD : |
| TGSI_SEMANTIC_GENERIC; |
| for (i = 0; i < ctx->info.num_inputs; i++) { |
| if (ctx->info.input_semantic_name[i] == semantic && |
| ctx->info.input_semantic_index[i] == 0) { |
| texcoord_index = i; |
| break; |
| } |
| } |
| |
| if (texcoord_index == -1) { |
| texcoord_index = ctx->info.num_inputs; |
| tgsi_transform_input_decl(tctx, texcoord_index, |
| semantic, 0, TGSI_INTERPOLATE_PERSPECTIVE); |
| } |
| |
| /* Declare the sampler. */ |
| tgsi_transform_sampler_decl(tctx, ctx->sampler_index); |
| |
| /* Declare the sampler view. */ |
| tgsi_transform_sampler_view_decl(tctx, ctx->sampler_index, |
| tgsi_tex_target, TGSI_RETURN_TYPE_FLOAT); |
| |
| /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ |
| tgsi_transform_tex_inst(tctx, |
| TGSI_FILE_TEMPORARY, 0, |
| TGSI_FILE_INPUT, texcoord_index, |
| tgsi_tex_target, ctx->sampler_index); |
| |
| /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ |
| inst = tgsi_default_full_instruction(); |
| inst.Instruction.Opcode = TGSI_OPCODE_KILL_IF; |
| inst.Instruction.NumDstRegs = 0; |
| inst.Instruction.NumSrcRegs = 1; |
| |
| inst.Src[0].Register.File = TGSI_FILE_TEMPORARY; |
| inst.Src[0].Register.Index = 0; |
| inst.Src[0].Register.Negate = 1; |
| inst.Src[0].Register.SwizzleX = TGSI_SWIZZLE_X; |
| if (ctx->swizzle_xxxx) { |
| inst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_X; |
| inst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_X; |
| inst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_X; |
| } else { |
| inst.Src[0].Register.SwizzleY = TGSI_SWIZZLE_Y; |
| inst.Src[0].Register.SwizzleZ = TGSI_SWIZZLE_Z; |
| inst.Src[0].Register.SwizzleW = TGSI_SWIZZLE_W; |
| } |
| tctx->emit_instruction(tctx, &inst); |
| |
| /* And emit the instruction we got. */ |
| tctx->emit_instruction(tctx, current_inst); |
| } |
| |
| const struct tgsi_token * |
| st_get_bitmap_shader(const struct tgsi_token *tokens, |
| unsigned tex_target, unsigned sampler_index, |
| bool use_texcoord, bool swizzle_xxxx) |
| { |
| struct tgsi_bitmap_transform ctx; |
| struct tgsi_token *newtoks; |
| int newlen; |
| |
| assert(tex_target == PIPE_TEXTURE_2D || |
| tex_target == PIPE_TEXTURE_RECT); |
| |
| memset(&ctx, 0, sizeof(ctx)); |
| ctx.base.transform_instruction = transform_instr; |
| ctx.tex_target = tex_target; |
| ctx.sampler_index = sampler_index; |
| ctx.use_texcoord = use_texcoord; |
| ctx.swizzle_xxxx = swizzle_xxxx; |
| tgsi_scan_shader(tokens, &ctx.info); |
| |
| 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; |
| } |