| // Copyright 2017 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "dawn_native/opengl/PipelineGL.h" |
| |
| #include "common/BitSetIterator.h" |
| #include "dawn_native/BindGroupLayout.h" |
| #include "dawn_native/Device.h" |
| #include "dawn_native/Pipeline.h" |
| #include "dawn_native/opengl/Forward.h" |
| #include "dawn_native/opengl/OpenGLFunctions.h" |
| #include "dawn_native/opengl/PipelineLayoutGL.h" |
| #include "dawn_native/opengl/SamplerGL.h" |
| #include "dawn_native/opengl/ShaderModuleGL.h" |
| |
| #include <set> |
| #include <sstream> |
| |
| namespace dawn_native { namespace opengl { |
| |
| namespace { |
| |
| GLenum GLShaderType(SingleShaderStage stage) { |
| switch (stage) { |
| case SingleShaderStage::Vertex: |
| return GL_VERTEX_SHADER; |
| case SingleShaderStage::Fragment: |
| return GL_FRAGMENT_SHADER; |
| case SingleShaderStage::Compute: |
| return GL_COMPUTE_SHADER; |
| } |
| UNREACHABLE(); |
| } |
| |
| } // namespace |
| |
| PipelineGL::PipelineGL() : mProgram(0) { |
| } |
| |
| PipelineGL::~PipelineGL() = default; |
| |
| MaybeError PipelineGL::InitializeBase(const OpenGLFunctions& gl, |
| const PipelineLayout* layout, |
| const PerStage<ProgrammableStage>& stages) { |
| auto CreateShader = [](const OpenGLFunctions& gl, GLenum type, |
| const char* source) -> ResultOrError<GLuint> { |
| GLuint shader = gl.CreateShader(type); |
| gl.ShaderSource(shader, 1, &source, nullptr); |
| gl.CompileShader(shader); |
| |
| GLint compileStatus = GL_FALSE; |
| gl.GetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus); |
| if (compileStatus == GL_FALSE) { |
| GLint infoLogLength = 0; |
| gl.GetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLogLength); |
| |
| if (infoLogLength > 1) { |
| std::vector<char> buffer(infoLogLength); |
| gl.GetShaderInfoLog(shader, infoLogLength, nullptr, &buffer[0]); |
| return DAWN_FORMAT_VALIDATION_ERROR("%s\nProgram compilation failed:\n%s", |
| source, buffer.data()); |
| } |
| } |
| return shader; |
| }; |
| |
| mProgram = gl.CreateProgram(); |
| |
| // Compute the set of active stages. |
| wgpu::ShaderStage activeStages = wgpu::ShaderStage::None; |
| for (SingleShaderStage stage : IterateStages(kAllStages)) { |
| if (stages[stage].module != nullptr) { |
| activeStages |= StageBit(stage); |
| } |
| } |
| |
| // Create an OpenGL shader for each stage and gather the list of combined samplers. |
| PerStage<CombinedSamplerInfo> combinedSamplers; |
| bool needsDummySampler = false; |
| std::vector<GLuint> glShaders; |
| for (SingleShaderStage stage : IterateStages(activeStages)) { |
| const ShaderModule* module = ToBackend(stages[stage].module.Get()); |
| std::string glsl; |
| DAWN_TRY_ASSIGN(glsl, module->TranslateToGLSL(stages[stage].entryPoint.c_str(), stage, |
| &combinedSamplers[stage], layout, |
| &needsDummySampler)); |
| GLuint shader; |
| DAWN_TRY_ASSIGN(shader, CreateShader(gl, GLShaderType(stage), glsl.c_str())); |
| gl.AttachShader(mProgram, shader); |
| glShaders.push_back(shader); |
| } |
| |
| if (needsDummySampler) { |
| SamplerDescriptor desc = {}; |
| ASSERT(desc.minFilter == wgpu::FilterMode::Nearest); |
| ASSERT(desc.magFilter == wgpu::FilterMode::Nearest); |
| ASSERT(desc.mipmapFilter == wgpu::FilterMode::Nearest); |
| mDummySampler = |
| ToBackend(layout->GetDevice()->GetOrCreateSampler(&desc).AcquireSuccess()); |
| } |
| |
| // Link all the shaders together. |
| gl.LinkProgram(mProgram); |
| |
| GLint linkStatus = GL_FALSE; |
| gl.GetProgramiv(mProgram, GL_LINK_STATUS, &linkStatus); |
| if (linkStatus == GL_FALSE) { |
| GLint infoLogLength = 0; |
| gl.GetProgramiv(mProgram, GL_INFO_LOG_LENGTH, &infoLogLength); |
| |
| if (infoLogLength > 1) { |
| std::vector<char> buffer(infoLogLength); |
| gl.GetProgramInfoLog(mProgram, infoLogLength, nullptr, &buffer[0]); |
| return DAWN_FORMAT_VALIDATION_ERROR("Program link failed:\n%s", buffer.data()); |
| } |
| } |
| |
| // Compute links between stages for combined samplers, then bind them to texture units |
| gl.UseProgram(mProgram); |
| const auto& indices = layout->GetBindingIndexInfo(); |
| |
| std::set<CombinedSampler> combinedSamplersSet; |
| for (SingleShaderStage stage : IterateStages(activeStages)) { |
| for (const CombinedSampler& combined : combinedSamplers[stage]) { |
| combinedSamplersSet.insert(combined); |
| } |
| } |
| |
| mUnitsForSamplers.resize(layout->GetNumSamplers()); |
| mUnitsForTextures.resize(layout->GetNumSampledTextures()); |
| |
| GLuint textureUnit = layout->GetTextureUnitsUsed(); |
| for (const auto& combined : combinedSamplersSet) { |
| const std::string& name = combined.GetName(); |
| GLint location = gl.GetUniformLocation(mProgram, name.c_str()); |
| |
| if (location == -1) { |
| continue; |
| } |
| |
| gl.Uniform1i(location, textureUnit); |
| |
| bool shouldUseFiltering; |
| { |
| const BindGroupLayoutBase* bgl = |
| layout->GetBindGroupLayout(combined.textureLocation.group); |
| BindingIndex bindingIndex = bgl->GetBindingIndex(combined.textureLocation.binding); |
| |
| GLuint textureIndex = indices[combined.textureLocation.group][bindingIndex]; |
| mUnitsForTextures[textureIndex].push_back(textureUnit); |
| |
| shouldUseFiltering = bgl->GetBindingInfo(bindingIndex).texture.sampleType == |
| wgpu::TextureSampleType::Float; |
| } |
| { |
| if (combined.useDummySampler) { |
| mDummySamplerUnits.push_back(textureUnit); |
| } else { |
| const BindGroupLayoutBase* bgl = |
| layout->GetBindGroupLayout(combined.samplerLocation.group); |
| BindingIndex bindingIndex = |
| bgl->GetBindingIndex(combined.samplerLocation.binding); |
| |
| GLuint samplerIndex = indices[combined.samplerLocation.group][bindingIndex]; |
| mUnitsForSamplers[samplerIndex].push_back({textureUnit, shouldUseFiltering}); |
| } |
| } |
| |
| textureUnit++; |
| } |
| |
| for (GLuint glShader : glShaders) { |
| gl.DetachShader(mProgram, glShader); |
| gl.DeleteShader(glShader); |
| } |
| |
| return {}; |
| } |
| |
| void PipelineGL::DeleteProgram(const OpenGLFunctions& gl) { |
| gl.DeleteProgram(mProgram); |
| } |
| |
| const std::vector<PipelineGL::SamplerUnit>& PipelineGL::GetTextureUnitsForSampler( |
| GLuint index) const { |
| ASSERT(index < mUnitsForSamplers.size()); |
| return mUnitsForSamplers[index]; |
| } |
| |
| const std::vector<GLuint>& PipelineGL::GetTextureUnitsForTextureView(GLuint index) const { |
| ASSERT(index < mUnitsForTextures.size()); |
| return mUnitsForTextures[index]; |
| } |
| |
| GLuint PipelineGL::GetProgramHandle() const { |
| return mProgram; |
| } |
| |
| void PipelineGL::ApplyNow(const OpenGLFunctions& gl) { |
| gl.UseProgram(mProgram); |
| for (GLuint unit : mDummySamplerUnits) { |
| ASSERT(mDummySampler.Get() != nullptr); |
| gl.BindSampler(unit, mDummySampler->GetNonFilteringHandle()); |
| } |
| } |
| |
| }} // namespace dawn_native::opengl |