/************************************************************************** * * Copyright 2009 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. * **************************************************************************/ /** * Largely a copy of llvmpipe's lp_tex_sample.c */ /** * Texture sampling code generation * * This file is nothing more than ugly glue between three largely independent * entities: * - TGSI -> LLVM translation (i.e., lp_build_tgsi_soa) * - texture sampling code generation (i.e., lp_build_sample_soa) * - SWR driver * * All interesting code is in the functions mentioned above. There is really * nothing to see here. * * @author Jose Fonseca */ #include "state.h" #include "JitManager.h" #include "state_llvm.h" #include "pipe/p_defines.h" #include "pipe/p_shader_tokens.h" #include "gallivm/lp_bld_debug.h" #include "gallivm/lp_bld_const.h" #include "gallivm/lp_bld_type.h" #include "gallivm/lp_bld_sample.h" #include "gallivm/lp_bld_tgsi.h" #include "util/u_memory.h" #include "swr_tex_sample.h" #include "swr_context_llvm.h" using namespace SwrJit; /** * This provides the bridge between the sampler state store in * lp_jit_context and lp_jit_texture and the sampler code * generator. It provides the texture layout information required by * the texture sampler code generator in terms of the state stored in * lp_jit_context and lp_jit_texture in runtime. */ struct swr_sampler_dynamic_state { struct lp_sampler_dynamic_state base; const struct swr_sampler_static_state *static_state; unsigned shader_type; }; /** * This is the bridge between our sampler and the TGSI translator. */ struct swr_sampler_soa { struct lp_build_sampler_soa base; struct swr_sampler_dynamic_state dynamic_state; }; /** * Fetch the specified member of the lp_jit_texture structure. * \param emit_load if TRUE, emit the LLVM load instruction to actually * fetch the field's value. Otherwise, just emit the * GEP code to address the field. * * @sa http://llvm.org/docs/GetElementPtr.html */ static LLVMValueRef swr_texture_member(const struct lp_sampler_dynamic_state *base, struct gallivm_state *gallivm, LLVMValueRef context_ptr, unsigned texture_unit, unsigned member_index, const char *member_name, boolean emit_load) { LLVMBuilderRef builder = gallivm->builder; LLVMValueRef indices[4]; LLVMValueRef ptr; LLVMValueRef res; assert(texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS); /* context[0] */ indices[0] = lp_build_const_int32(gallivm, 0); /* context[0].textures */ auto dynamic = (const struct swr_sampler_dynamic_state *)base; switch (dynamic->shader_type) { case PIPE_SHADER_FRAGMENT: indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesFS); break; case PIPE_SHADER_VERTEX: indices[1] = lp_build_const_int32(gallivm, swr_draw_context_texturesVS); break; default: assert(0 && "unsupported shader type"); break; } /* context[0].textures[unit] */ indices[2] = lp_build_const_int32(gallivm, texture_unit); /* context[0].textures[unit].member */ indices[3] = lp_build_const_int32(gallivm, member_index); ptr = LLVMBuildGEP(builder, context_ptr, indices, ARRAY_SIZE(indices), ""); if (emit_load) res = LLVMBuildLoad(builder, ptr, ""); else res = ptr; lp_build_name(res, "context.texture%u.%s", texture_unit, member_name); return res; } /** * Helper macro to instantiate the functions that generate the code to * fetch the members of lp_jit_texture to fulfill the sampler code * generator requests. * * This complexity is the price we have to pay to keep the texture * sampler code generator a reusable module without dependencies to * swr internals. */ #define SWR_TEXTURE_MEMBER(_name, _emit_load) \ static LLVMValueRef swr_texture_##_name( \ const struct lp_sampler_dynamic_state *base, \ struct gallivm_state *gallivm, \ LLVMValueRef context_ptr, \ unsigned texture_unit) \ { \ return swr_texture_member(base, \ gallivm, \ context_ptr, \ texture_unit, \ swr_jit_texture_##_name, \ #_name, \ _emit_load); \ } SWR_TEXTURE_MEMBER(width, TRUE) SWR_TEXTURE_MEMBER(height, TRUE) SWR_TEXTURE_MEMBER(depth, TRUE) SWR_TEXTURE_MEMBER(first_level, TRUE) SWR_TEXTURE_MEMBER(last_level, TRUE) SWR_TEXTURE_MEMBER(base_ptr, TRUE) SWR_TEXTURE_MEMBER(row_stride, FALSE) SWR_TEXTURE_MEMBER(img_stride, FALSE) SWR_TEXTURE_MEMBER(mip_offsets, FALSE) /** * Fetch the specified member of the lp_jit_sampler structure. * \param emit_load if TRUE, emit the LLVM load instruction to actually * fetch the field's value. Otherwise, just emit the * GEP code to address the field. * * @sa http://llvm.org/docs/GetElementPtr.html */ static LLVMValueRef swr_sampler_member(const struct lp_sampler_dynamic_state *base, struct gallivm_state *gallivm, LLVMValueRef context_ptr, unsigned sampler_unit, unsigned member_index, const char *member_name, boolean emit_load) { LLVMBuilderRef builder = gallivm->builder; LLVMValueRef indices[4]; LLVMValueRef ptr; LLVMValueRef res; assert(sampler_unit < PIPE_MAX_SAMPLERS); /* context[0] */ indices[0] = lp_build_const_int32(gallivm, 0); /* context[0].samplers */ auto dynamic = (const struct swr_sampler_dynamic_state *)base; switch (dynamic->shader_type) { case PIPE_SHADER_FRAGMENT: indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersFS); break; case PIPE_SHADER_VERTEX: indices[1] = lp_build_const_int32(gallivm, swr_draw_context_samplersVS); break; default: assert(0 && "unsupported shader type"); break; } /* context[0].samplers[unit] */ indices[2] = lp_build_const_int32(gallivm, sampler_unit); /* context[0].samplers[unit].member */ indices[3] = lp_build_const_int32(gallivm, member_index); ptr = LLVMBuildGEP(builder, context_ptr, indices, ARRAY_SIZE(indices), ""); if (emit_load) res = LLVMBuildLoad(builder, ptr, ""); else res = ptr; lp_build_name(res, "context.sampler%u.%s", sampler_unit, member_name); return res; } #define SWR_SAMPLER_MEMBER(_name, _emit_load) \ static LLVMValueRef swr_sampler_##_name( \ const struct lp_sampler_dynamic_state *base, \ struct gallivm_state *gallivm, \ LLVMValueRef context_ptr, \ unsigned sampler_unit) \ { \ return swr_sampler_member(base, \ gallivm, \ context_ptr, \ sampler_unit, \ swr_jit_sampler_##_name, \ #_name, \ _emit_load); \ } SWR_SAMPLER_MEMBER(min_lod, TRUE) SWR_SAMPLER_MEMBER(max_lod, TRUE) SWR_SAMPLER_MEMBER(lod_bias, TRUE) SWR_SAMPLER_MEMBER(border_color, FALSE) static void swr_sampler_soa_destroy(struct lp_build_sampler_soa *sampler) { FREE(sampler); } /** * Fetch filtered values from texture. * The 'texel' parameter returns four vectors corresponding to R, G, B, A. */ static void swr_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa *base, struct gallivm_state *gallivm, const struct lp_sampler_params *params) { struct swr_sampler_soa *sampler = (struct swr_sampler_soa *)base; unsigned texture_index = params->texture_index; unsigned sampler_index = params->sampler_index; assert(sampler_index < PIPE_MAX_SAMPLERS); assert(texture_index < PIPE_MAX_SHADER_SAMPLER_VIEWS); #if 0 lp_build_sample_nop(gallivm, params->type, params->coords, params->texel); #else lp_build_sample_soa( &sampler->dynamic_state.static_state[texture_index].texture_state, &sampler->dynamic_state.static_state[sampler_index].sampler_state, &sampler->dynamic_state.base, gallivm, params); #endif } /** * Fetch the texture size. */ static void swr_sampler_soa_emit_size_query(const struct lp_build_sampler_soa *base, struct gallivm_state *gallivm, const struct lp_sampler_size_query_params *params) { struct swr_sampler_soa *sampler = (struct swr_sampler_soa *)base; assert(params->texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS); lp_build_size_query_soa( gallivm, &sampler->dynamic_state.static_state[params->texture_unit].texture_state, &sampler->dynamic_state.base, params); } struct lp_build_sampler_soa * swr_sampler_soa_create(const struct swr_sampler_static_state *static_state, unsigned shader_type) { struct swr_sampler_soa *sampler; sampler = CALLOC_STRUCT(swr_sampler_soa); if (!sampler) return NULL; sampler->base.destroy = swr_sampler_soa_destroy; sampler->base.emit_tex_sample = swr_sampler_soa_emit_fetch_texel; sampler->base.emit_size_query = swr_sampler_soa_emit_size_query; sampler->dynamic_state.base.width = swr_texture_width; sampler->dynamic_state.base.height = swr_texture_height; sampler->dynamic_state.base.depth = swr_texture_depth; sampler->dynamic_state.base.first_level = swr_texture_first_level; sampler->dynamic_state.base.last_level = swr_texture_last_level; sampler->dynamic_state.base.base_ptr = swr_texture_base_ptr; sampler->dynamic_state.base.row_stride = swr_texture_row_stride; sampler->dynamic_state.base.img_stride = swr_texture_img_stride; sampler->dynamic_state.base.mip_offsets = swr_texture_mip_offsets; sampler->dynamic_state.base.min_lod = swr_sampler_min_lod; sampler->dynamic_state.base.max_lod = swr_sampler_max_lod; sampler->dynamic_state.base.lod_bias = swr_sampler_lod_bias; sampler->dynamic_state.base.border_color = swr_sampler_border_color; sampler->dynamic_state.static_state = static_state; sampler->dynamic_state.shader_type = shader_type; return &sampler->base; }