| /************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| /** |
| * 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) |
| * - LLVM pipe driver |
| * |
| * All interesting code is in the functions mentioned above. There is really |
| * nothing to see here. |
| * |
| * @author Jose Fonseca <jfonseca@vmware.com> |
| */ |
| |
| #include "pipe/p_defines.h" |
| #include "pipe/p_shader_tokens.h" |
| #include "gallivm/lp_bld_debug.h" |
| #include "gallivm/lp_bld_type.h" |
| #include "gallivm/lp_bld_sample.h" |
| #include "gallivm/lp_bld_tgsi.h" |
| #include "lp_jit.h" |
| #include "lp_tex_sample.h" |
| |
| |
| /** |
| * 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 llvmpipe_sampler_dynamic_state |
| { |
| struct lp_sampler_dynamic_state base; |
| |
| const struct lp_sampler_static_state *static_state; |
| |
| LLVMValueRef context_ptr; |
| }; |
| |
| |
| /** |
| * This is the bridge between our sampler and the TGSI translator. |
| */ |
| struct lp_llvm_sampler_soa |
| { |
| struct lp_build_sampler_soa base; |
| |
| struct llvmpipe_sampler_dynamic_state dynamic_state; |
| }; |
| |
| |
| /** |
| * Fetch the specified member of the lp_jit_texture structure. |
| * |
| * @sa http://llvm.org/docs/GetElementPtr.html |
| */ |
| static LLVMValueRef |
| lp_llvm_texture_member(struct lp_sampler_dynamic_state *base, |
| LLVMBuilderRef builder, |
| unsigned unit, |
| unsigned member_index, |
| const char *member_name) |
| { |
| struct llvmpipe_sampler_dynamic_state *state = (struct llvmpipe_sampler_dynamic_state *)base; |
| LLVMValueRef indices[4]; |
| LLVMValueRef ptr; |
| LLVMValueRef res; |
| |
| assert(unit < PIPE_MAX_SAMPLERS); |
| |
| /* context[0] */ |
| indices[0] = LLVMConstInt(LLVMInt32Type(), 0, 0); |
| /* context[0].textures */ |
| indices[1] = LLVMConstInt(LLVMInt32Type(), LP_JIT_CONTEXT_TEXTURES_INDEX, 0); |
| /* context[0].textures[unit] */ |
| indices[2] = LLVMConstInt(LLVMInt32Type(), unit, 0); |
| /* context[0].textures[unit].member */ |
| indices[3] = LLVMConstInt(LLVMInt32Type(), member_index, 0); |
| |
| ptr = LLVMBuildGEP(builder, state->context_ptr, indices, Elements(indices), ""); |
| |
| res = LLVMBuildLoad(builder, ptr, ""); |
| |
| lp_build_name(res, "context.texture%u.%s", 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 llvmpipe internals. |
| */ |
| #define LP_LLVM_TEXTURE_MEMBER(_name, _index) \ |
| static LLVMValueRef \ |
| lp_llvm_texture_##_name( struct lp_sampler_dynamic_state *base, \ |
| LLVMBuilderRef builder, \ |
| unsigned unit) \ |
| { \ |
| return lp_llvm_texture_member(base, builder, unit, _index, #_name ); \ |
| } |
| |
| |
| LP_LLVM_TEXTURE_MEMBER(width, LP_JIT_TEXTURE_WIDTH) |
| LP_LLVM_TEXTURE_MEMBER(height, LP_JIT_TEXTURE_HEIGHT) |
| LP_LLVM_TEXTURE_MEMBER(stride, LP_JIT_TEXTURE_STRIDE) |
| LP_LLVM_TEXTURE_MEMBER(data_ptr, LP_JIT_TEXTURE_DATA) |
| |
| |
| static void |
| lp_llvm_sampler_soa_destroy(struct lp_build_sampler_soa *sampler) |
| { |
| FREE(sampler); |
| } |
| |
| |
| static void |
| lp_llvm_sampler_soa_emit_fetch_texel(struct lp_build_sampler_soa *base, |
| LLVMBuilderRef builder, |
| struct lp_type type, |
| unsigned unit, |
| unsigned num_coords, |
| const LLVMValueRef *coords, |
| LLVMValueRef lodbias, |
| LLVMValueRef *texel) |
| { |
| struct lp_llvm_sampler_soa *sampler = (struct lp_llvm_sampler_soa *)base; |
| |
| assert(unit < PIPE_MAX_SAMPLERS); |
| |
| lp_build_sample_soa(builder, |
| &sampler->dynamic_state.static_state[unit], |
| &sampler->dynamic_state.base, |
| type, |
| unit, |
| num_coords, |
| coords, |
| lodbias, |
| texel); |
| } |
| |
| |
| struct lp_build_sampler_soa * |
| lp_llvm_sampler_soa_create(const struct lp_sampler_static_state *static_state, |
| LLVMValueRef context_ptr) |
| { |
| struct lp_llvm_sampler_soa *sampler; |
| |
| sampler = CALLOC_STRUCT(lp_llvm_sampler_soa); |
| if(!sampler) |
| return NULL; |
| |
| sampler->base.destroy = lp_llvm_sampler_soa_destroy; |
| sampler->base.emit_fetch_texel = lp_llvm_sampler_soa_emit_fetch_texel; |
| sampler->dynamic_state.base.width = lp_llvm_texture_width; |
| sampler->dynamic_state.base.height = lp_llvm_texture_height; |
| sampler->dynamic_state.base.stride = lp_llvm_texture_stride; |
| sampler->dynamic_state.base.data_ptr = lp_llvm_texture_data_ptr; |
| sampler->dynamic_state.static_state = static_state; |
| sampler->dynamic_state.context_ptr = context_ptr; |
| |
| return &sampler->base; |
| } |
| |