323 lines
12 KiB
C
323 lines
12 KiB
C
/**************************************************************************
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*
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* Copyright 2010 VMware, Inc.
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* Texture sampling code generation
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#include "pipe/p_defines.h"
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#include "pipe/p_shader_tokens.h"
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#include "gallivm/lp_bld_const.h"
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#include "gallivm/lp_bld_debug.h"
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#include "gallivm/lp_bld_type.h"
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#include "gallivm/lp_bld_sample.h"
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#include "gallivm/lp_bld_tgsi.h"
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#include "util/u_debug.h"
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#include "util/u_memory.h"
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#include "util/u_pointer.h"
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#include "util/u_string.h"
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#include "draw_llvm.h"
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/**
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* This provides the bridge between the sampler state store in
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* lp_jit_context and lp_jit_texture and the sampler code
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* generator. It provides the texture layout information required by
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* the texture sampler code generator in terms of the state stored in
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* lp_jit_context and lp_jit_texture in runtime.
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*/
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struct draw_llvm_sampler_dynamic_state
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{
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struct lp_sampler_dynamic_state base;
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const struct draw_sampler_static_state *static_state;
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LLVMValueRef context_ptr;
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};
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/**
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* This is the bridge between our sampler and the TGSI translator.
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*/
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struct draw_llvm_sampler_soa
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{
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struct lp_build_sampler_soa base;
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struct draw_llvm_sampler_dynamic_state dynamic_state;
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};
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/**
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* Fetch the specified member of the lp_jit_texture structure.
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* \param emit_load if TRUE, emit the LLVM load instruction to actually
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* fetch the field's value. Otherwise, just emit the
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* GEP code to address the field.
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*
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* @sa http://llvm.org/docs/GetElementPtr.html
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*/
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static LLVMValueRef
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draw_llvm_texture_member(const struct lp_sampler_dynamic_state *base,
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struct gallivm_state *gallivm,
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unsigned texture_unit,
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unsigned member_index,
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const char *member_name,
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boolean emit_load)
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{
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LLVMBuilderRef builder = gallivm->builder;
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struct draw_llvm_sampler_dynamic_state *state =
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(struct draw_llvm_sampler_dynamic_state *)base;
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LLVMValueRef indices[4];
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LLVMValueRef ptr;
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LLVMValueRef res;
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debug_assert(texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS);
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/* context[0] */
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indices[0] = lp_build_const_int32(gallivm, 0);
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/* context[0].textures */
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indices[1] = lp_build_const_int32(gallivm, DRAW_JIT_CTX_TEXTURES);
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/* context[0].textures[unit] */
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indices[2] = lp_build_const_int32(gallivm, texture_unit);
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/* context[0].textures[unit].member */
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indices[3] = lp_build_const_int32(gallivm, member_index);
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ptr = LLVMBuildGEP(builder, state->context_ptr, indices, Elements(indices), "");
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if (emit_load)
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res = LLVMBuildLoad(builder, ptr, "");
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else
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res = ptr;
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lp_build_name(res, "context.texture%u.%s", texture_unit, member_name);
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return res;
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}
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/**
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* Fetch the specified member of the lp_jit_sampler structure.
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* \param emit_load if TRUE, emit the LLVM load instruction to actually
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* fetch the field's value. Otherwise, just emit the
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* GEP code to address the field.
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*
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* @sa http://llvm.org/docs/GetElementPtr.html
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*/
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static LLVMValueRef
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draw_llvm_sampler_member(const struct lp_sampler_dynamic_state *base,
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struct gallivm_state *gallivm,
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unsigned sampler_unit,
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unsigned member_index,
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const char *member_name,
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boolean emit_load)
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{
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LLVMBuilderRef builder = gallivm->builder;
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struct draw_llvm_sampler_dynamic_state *state =
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(struct draw_llvm_sampler_dynamic_state *)base;
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LLVMValueRef indices[4];
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LLVMValueRef ptr;
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LLVMValueRef res;
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debug_assert(sampler_unit < PIPE_MAX_SAMPLERS);
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/* context[0] */
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indices[0] = lp_build_const_int32(gallivm, 0);
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/* context[0].samplers */
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indices[1] = lp_build_const_int32(gallivm, DRAW_JIT_CTX_SAMPLERS);
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/* context[0].samplers[unit] */
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indices[2] = lp_build_const_int32(gallivm, sampler_unit);
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/* context[0].samplers[unit].member */
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indices[3] = lp_build_const_int32(gallivm, member_index);
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ptr = LLVMBuildGEP(builder, state->context_ptr, indices, Elements(indices), "");
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if (emit_load)
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res = LLVMBuildLoad(builder, ptr, "");
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else
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res = ptr;
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lp_build_name(res, "context.sampler%u.%s", sampler_unit, member_name);
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return res;
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}
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/**
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* Helper macro to instantiate the functions that generate the code to
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* fetch the members of lp_jit_texture to fulfill the sampler code
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* generator requests.
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*
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* This complexity is the price we have to pay to keep the texture
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* sampler code generator a reusable module without dependencies to
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* llvmpipe internals.
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*/
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#define DRAW_LLVM_TEXTURE_MEMBER(_name, _index, _emit_load) \
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static LLVMValueRef \
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draw_llvm_texture_##_name( const struct lp_sampler_dynamic_state *base, \
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struct gallivm_state *gallivm, \
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unsigned texture_unit) \
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{ \
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return draw_llvm_texture_member(base, gallivm, texture_unit, _index, #_name, _emit_load ); \
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}
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DRAW_LLVM_TEXTURE_MEMBER(width, DRAW_JIT_TEXTURE_WIDTH, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(height, DRAW_JIT_TEXTURE_HEIGHT, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(depth, DRAW_JIT_TEXTURE_DEPTH, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(first_level,DRAW_JIT_TEXTURE_FIRST_LEVEL, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(last_level, DRAW_JIT_TEXTURE_LAST_LEVEL, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(base_ptr, DRAW_JIT_TEXTURE_BASE, TRUE)
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DRAW_LLVM_TEXTURE_MEMBER(row_stride, DRAW_JIT_TEXTURE_ROW_STRIDE, FALSE)
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DRAW_LLVM_TEXTURE_MEMBER(img_stride, DRAW_JIT_TEXTURE_IMG_STRIDE, FALSE)
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DRAW_LLVM_TEXTURE_MEMBER(mip_offsets, DRAW_JIT_TEXTURE_MIP_OFFSETS, FALSE)
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#define DRAW_LLVM_SAMPLER_MEMBER(_name, _index, _emit_load) \
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static LLVMValueRef \
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draw_llvm_sampler_##_name( const struct lp_sampler_dynamic_state *base, \
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struct gallivm_state *gallivm, \
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unsigned sampler_unit) \
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{ \
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return draw_llvm_sampler_member(base, gallivm, sampler_unit, _index, #_name, _emit_load ); \
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}
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DRAW_LLVM_SAMPLER_MEMBER(min_lod, DRAW_JIT_SAMPLER_MIN_LOD, TRUE)
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DRAW_LLVM_SAMPLER_MEMBER(max_lod, DRAW_JIT_SAMPLER_MAX_LOD, TRUE)
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DRAW_LLVM_SAMPLER_MEMBER(lod_bias, DRAW_JIT_SAMPLER_LOD_BIAS, TRUE)
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DRAW_LLVM_SAMPLER_MEMBER(border_color, DRAW_JIT_SAMPLER_BORDER_COLOR, FALSE)
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static void
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draw_llvm_sampler_soa_destroy(struct lp_build_sampler_soa *sampler)
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{
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FREE(sampler);
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}
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/**
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* Fetch filtered values from texture.
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* The 'texel' parameter returns four vectors corresponding to R, G, B, A.
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*/
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static void
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draw_llvm_sampler_soa_emit_fetch_texel(const struct lp_build_sampler_soa *base,
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struct gallivm_state *gallivm,
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struct lp_type type,
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boolean is_fetch,
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unsigned texture_index,
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unsigned sampler_index,
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const LLVMValueRef *coords,
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const LLVMValueRef *offsets,
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const struct lp_derivatives *derivs,
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LLVMValueRef lod_bias, /* optional */
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LLVMValueRef explicit_lod, /* optional */
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boolean scalar_lod,
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LLVMValueRef *texel)
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{
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struct draw_llvm_sampler_soa *sampler = (struct draw_llvm_sampler_soa *)base;
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assert(texture_index < PIPE_MAX_SHADER_SAMPLER_VIEWS);
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assert(sampler_index < PIPE_MAX_SAMPLERS);
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lp_build_sample_soa(gallivm,
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&sampler->dynamic_state.static_state[texture_index].texture_state,
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&sampler->dynamic_state.static_state[sampler_index].sampler_state,
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&sampler->dynamic_state.base,
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type,
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is_fetch,
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texture_index,
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sampler_index,
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coords,
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offsets,
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derivs,
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lod_bias, explicit_lod, scalar_lod,
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texel);
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}
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/**
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* Fetch the texture size.
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*/
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static void
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draw_llvm_sampler_soa_emit_size_query(const struct lp_build_sampler_soa *base,
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struct gallivm_state *gallivm,
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struct lp_type type,
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unsigned texture_unit,
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boolean need_nr_mips,
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LLVMValueRef explicit_lod, /* optional */
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LLVMValueRef *sizes_out)
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{
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struct draw_llvm_sampler_soa *sampler = (struct draw_llvm_sampler_soa *)base;
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assert(texture_unit < PIPE_MAX_SHADER_SAMPLER_VIEWS);
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lp_build_size_query_soa(gallivm,
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&sampler->dynamic_state.static_state[texture_unit].texture_state,
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&sampler->dynamic_state.base,
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type,
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texture_unit,
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need_nr_mips,
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explicit_lod,
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sizes_out);
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}
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struct lp_build_sampler_soa *
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draw_llvm_sampler_soa_create(const struct draw_sampler_static_state *static_state,
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LLVMValueRef context_ptr)
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{
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struct draw_llvm_sampler_soa *sampler;
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sampler = CALLOC_STRUCT(draw_llvm_sampler_soa);
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if(!sampler)
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return NULL;
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sampler->base.destroy = draw_llvm_sampler_soa_destroy;
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sampler->base.emit_fetch_texel = draw_llvm_sampler_soa_emit_fetch_texel;
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sampler->base.emit_size_query = draw_llvm_sampler_soa_emit_size_query;
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sampler->dynamic_state.base.width = draw_llvm_texture_width;
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sampler->dynamic_state.base.height = draw_llvm_texture_height;
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sampler->dynamic_state.base.depth = draw_llvm_texture_depth;
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sampler->dynamic_state.base.first_level = draw_llvm_texture_first_level;
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sampler->dynamic_state.base.last_level = draw_llvm_texture_last_level;
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sampler->dynamic_state.base.row_stride = draw_llvm_texture_row_stride;
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sampler->dynamic_state.base.img_stride = draw_llvm_texture_img_stride;
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sampler->dynamic_state.base.base_ptr = draw_llvm_texture_base_ptr;
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sampler->dynamic_state.base.mip_offsets = draw_llvm_texture_mip_offsets;
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sampler->dynamic_state.base.min_lod = draw_llvm_sampler_min_lod;
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sampler->dynamic_state.base.max_lod = draw_llvm_sampler_max_lod;
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sampler->dynamic_state.base.lod_bias = draw_llvm_sampler_lod_bias;
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sampler->dynamic_state.base.border_color = draw_llvm_sampler_border_color;
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sampler->dynamic_state.static_state = static_state;
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sampler->dynamic_state.context_ptr = context_ptr;
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return &sampler->base;
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}
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