| // 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/ShaderModuleGL.h" |
| |
| #include "common/Assert.h" |
| #include "common/Platform.h" |
| #include "dawn_native/BindGroupLayout.h" |
| #include "dawn_native/SpirvValidation.h" |
| #include "dawn_native/TintUtils.h" |
| #include "dawn_native/opengl/DeviceGL.h" |
| #include "dawn_native/opengl/PipelineLayoutGL.h" |
| #include "dawn_native/opengl/SpirvUtils.h" |
| |
| #include <spirv_glsl.hpp> |
| |
| // Tint include must be after spirv_glsl.hpp, because spirv-cross has its own |
| // version of spirv_headers. We also need to undef SPV_REVISION because SPIRV-Cross |
| // is at 3 while spirv-headers is at 4. |
| #undef SPV_REVISION |
| #include <tint/tint.h> |
| #include <spirv-tools/libspirv.hpp> |
| |
| #include <sstream> |
| |
| namespace dawn_native { namespace opengl { |
| |
| std::string GetBindingName(BindGroupIndex group, BindingNumber bindingNumber) { |
| std::ostringstream o; |
| o << "dawn_binding_" << static_cast<uint32_t>(group) << "_" |
| << static_cast<uint32_t>(bindingNumber); |
| return o.str(); |
| } |
| |
| bool operator<(const BindingLocation& a, const BindingLocation& b) { |
| return std::tie(a.group, a.binding) < std::tie(b.group, b.binding); |
| } |
| |
| bool operator<(const CombinedSampler& a, const CombinedSampler& b) { |
| return std::tie(a.useDummySampler, a.samplerLocation, a.textureLocation) < |
| std::tie(b.useDummySampler, a.samplerLocation, b.textureLocation); |
| } |
| |
| std::string CombinedSampler::GetName() const { |
| std::ostringstream o; |
| o << "dawn_combined"; |
| if (useDummySampler) { |
| o << "_dummy_sampler"; |
| } else { |
| o << "_" << static_cast<uint32_t>(samplerLocation.group) << "_" |
| << static_cast<uint32_t>(samplerLocation.binding); |
| } |
| o << "_with_" << static_cast<uint32_t>(textureLocation.group) << "_" |
| << static_cast<uint32_t>(textureLocation.binding); |
| return o.str(); |
| } |
| |
| ResultOrError<std::unique_ptr<BindingInfoArray>> ExtractSpirvInfo( |
| const DeviceBase* device, |
| const spirv_cross::Compiler& compiler, |
| const std::string& entryPointName, |
| SingleShaderStage stage) { |
| const auto& resources = compiler.get_shader_resources(); |
| |
| // Fill in bindingInfo with the SPIRV bindings |
| auto ExtractResourcesBinding = |
| [](const DeviceBase* device, |
| const spirv_cross::SmallVector<spirv_cross::Resource>& resources, |
| const spirv_cross::Compiler& compiler, BindingInfoType bindingType, |
| BindingInfoArray* bindings, bool isStorageBuffer = false) -> MaybeError { |
| for (const auto& resource : resources) { |
| if (!compiler.get_decoration_bitset(resource.id).get(spv::DecorationBinding)) { |
| return DAWN_VALIDATION_ERROR("No Binding decoration set for resource"); |
| } |
| |
| if (!compiler.get_decoration_bitset(resource.id) |
| .get(spv::DecorationDescriptorSet)) { |
| return DAWN_VALIDATION_ERROR("No Descriptor Decoration set for resource"); |
| } |
| |
| BindingNumber bindingNumber( |
| compiler.get_decoration(resource.id, spv::DecorationBinding)); |
| BindGroupIndex bindGroupIndex( |
| compiler.get_decoration(resource.id, spv::DecorationDescriptorSet)); |
| |
| if (bindGroupIndex >= kMaxBindGroupsTyped) { |
| return DAWN_VALIDATION_ERROR("Bind group index over limits in the SPIRV"); |
| } |
| |
| const auto& it = |
| (*bindings)[bindGroupIndex].emplace(bindingNumber, ShaderBindingInfo{}); |
| if (!it.second) { |
| return DAWN_VALIDATION_ERROR("Shader has duplicate bindings"); |
| } |
| |
| ShaderBindingInfo* info = &it.first->second; |
| info->id = resource.id; |
| info->base_type_id = resource.base_type_id; |
| info->bindingType = bindingType; |
| |
| switch (bindingType) { |
| case BindingInfoType::Texture: { |
| spirv_cross::SPIRType::ImageType imageType = |
| compiler.get_type(info->base_type_id).image; |
| spirv_cross::SPIRType::BaseType textureComponentType = |
| compiler.get_type(imageType.type).basetype; |
| |
| info->texture.viewDimension = |
| SpirvDimToTextureViewDimension(imageType.dim, imageType.arrayed); |
| info->texture.multisampled = imageType.ms; |
| info->texture.compatibleSampleTypes = |
| SpirvBaseTypeToSampleTypeBit(textureComponentType); |
| |
| if (imageType.depth) { |
| if ((info->texture.compatibleSampleTypes & SampleTypeBit::Float) == 0) { |
| return DAWN_VALIDATION_ERROR( |
| "Depth textures must have a float type"); |
| } |
| info->texture.compatibleSampleTypes = SampleTypeBit::Depth; |
| } |
| |
| if (imageType.ms && imageType.arrayed) { |
| return DAWN_VALIDATION_ERROR( |
| "Multisampled array textures aren't supported"); |
| } |
| break; |
| } |
| case BindingInfoType::Buffer: { |
| // Determine buffer size, with a minimum of 1 element in the runtime |
| // array |
| spirv_cross::SPIRType type = compiler.get_type(info->base_type_id); |
| info->buffer.minBindingSize = |
| compiler.get_declared_struct_size_runtime_array(type, 1); |
| |
| // Differentiate between readonly storage bindings and writable ones |
| // based on the NonWritable decoration. |
| // TODO(dawn:527): Could isStorageBuffer be determined by calling |
| // compiler.get_storage_class(resource.id)? |
| if (isStorageBuffer) { |
| spirv_cross::Bitset flags = |
| compiler.get_buffer_block_flags(resource.id); |
| if (flags.get(spv::DecorationNonWritable)) { |
| info->buffer.type = wgpu::BufferBindingType::ReadOnlyStorage; |
| } else { |
| info->buffer.type = wgpu::BufferBindingType::Storage; |
| } |
| } else { |
| info->buffer.type = wgpu::BufferBindingType::Uniform; |
| } |
| break; |
| } |
| case BindingInfoType::StorageTexture: { |
| spirv_cross::Bitset flags = compiler.get_decoration_bitset(resource.id); |
| if (flags.get(spv::DecorationNonReadable)) { |
| info->storageTexture.access = wgpu::StorageTextureAccess::WriteOnly; |
| } else if (flags.get(spv::DecorationNonWritable)) { |
| info->storageTexture.access = wgpu::StorageTextureAccess::ReadOnly; |
| } else { |
| return DAWN_VALIDATION_ERROR( |
| "Read-write storage textures are not supported"); |
| } |
| |
| spirv_cross::SPIRType::ImageType imageType = |
| compiler.get_type(info->base_type_id).image; |
| wgpu::TextureFormat storageTextureFormat = |
| SpirvImageFormatToTextureFormat(imageType.format); |
| if (storageTextureFormat == wgpu::TextureFormat::Undefined) { |
| return DAWN_VALIDATION_ERROR( |
| "Invalid image format declaration on storage image"); |
| } |
| const Format& format = device->GetValidInternalFormat(storageTextureFormat); |
| if (!format.supportsStorageUsage) { |
| return DAWN_VALIDATION_ERROR( |
| "The storage texture format is not supported"); |
| } |
| if (imageType.ms) { |
| return DAWN_VALIDATION_ERROR( |
| "Multisampled storage textures aren't supported"); |
| } |
| if (imageType.depth) { |
| return DAWN_VALIDATION_ERROR("Depth storage textures aren't supported"); |
| } |
| info->storageTexture.format = storageTextureFormat; |
| info->storageTexture.viewDimension = |
| SpirvDimToTextureViewDimension(imageType.dim, imageType.arrayed); |
| break; |
| } |
| case BindingInfoType::Sampler: { |
| info->sampler.isComparison = false; |
| break; |
| } |
| case BindingInfoType::ExternalTexture: { |
| return DAWN_VALIDATION_ERROR("External textures are not supported."); |
| } |
| } |
| } |
| return {}; |
| }; |
| |
| std::unique_ptr<BindingInfoArray> resultBindings = std::make_unique<BindingInfoArray>(); |
| BindingInfoArray* bindings = resultBindings.get(); |
| DAWN_TRY(ExtractResourcesBinding(device, resources.uniform_buffers, compiler, |
| BindingInfoType::Buffer, bindings)); |
| DAWN_TRY(ExtractResourcesBinding(device, resources.separate_images, compiler, |
| BindingInfoType::Texture, bindings)); |
| DAWN_TRY(ExtractResourcesBinding(device, resources.separate_samplers, compiler, |
| BindingInfoType::Sampler, bindings)); |
| DAWN_TRY(ExtractResourcesBinding(device, resources.storage_buffers, compiler, |
| BindingInfoType::Buffer, bindings, true)); |
| // ReadonlyStorageTexture is used as a tag to do general storage texture handling. |
| DAWN_TRY(ExtractResourcesBinding(device, resources.storage_images, compiler, |
| BindingInfoType::StorageTexture, resultBindings.get())); |
| |
| return {std::move(resultBindings)}; |
| } |
| |
| // static |
| ResultOrError<Ref<ShaderModule>> ShaderModule::Create(Device* device, |
| const ShaderModuleDescriptor* descriptor, |
| ShaderModuleParseResult* parseResult) { |
| Ref<ShaderModule> module = AcquireRef(new ShaderModule(device, descriptor)); |
| DAWN_TRY(module->Initialize(parseResult)); |
| return module; |
| } |
| |
| ShaderModule::ShaderModule(Device* device, const ShaderModuleDescriptor* descriptor) |
| : ShaderModuleBase(device, descriptor) { |
| } |
| |
| // static |
| ResultOrError<BindingInfoArrayTable> ShaderModule::ReflectShaderUsingSPIRVCross( |
| DeviceBase* device, |
| const std::vector<uint32_t>& spirv) { |
| BindingInfoArrayTable result; |
| spirv_cross::Compiler compiler(spirv); |
| for (const spirv_cross::EntryPoint& entryPoint : compiler.get_entry_points_and_stages()) { |
| ASSERT(result.count(entryPoint.name) == 0); |
| |
| SingleShaderStage stage = ExecutionModelToShaderStage(entryPoint.execution_model); |
| compiler.set_entry_point(entryPoint.name, entryPoint.execution_model); |
| |
| std::unique_ptr<BindingInfoArray> bindings; |
| DAWN_TRY_ASSIGN(bindings, ExtractSpirvInfo(device, compiler, entryPoint.name, stage)); |
| result[entryPoint.name] = std::move(bindings); |
| } |
| return std::move(result); |
| } |
| |
| MaybeError ShaderModule::Initialize(ShaderModuleParseResult* parseResult) { |
| ScopedTintICEHandler scopedICEHandler(GetDevice()); |
| |
| DAWN_TRY(InitializeBase(parseResult)); |
| // Tint currently does not support emitting GLSL, so when provided a Tint program need to |
| // generate SPIRV and SPIRV-Cross reflection data to be used in this backend. |
| tint::writer::spirv::Options options; |
| options.disable_workgroup_init = GetDevice()->IsToggleEnabled(Toggle::DisableWorkgroupInit); |
| auto result = tint::writer::spirv::Generate(GetTintProgram(), options); |
| if (!result.success) { |
| std::ostringstream errorStream; |
| errorStream << "Generator: " << result.error << std::endl; |
| return DAWN_VALIDATION_ERROR(errorStream.str().c_str()); |
| } |
| |
| DAWN_TRY_ASSIGN(mGLBindings, ReflectShaderUsingSPIRVCross(GetDevice(), result.spirv)); |
| |
| return {}; |
| } |
| |
| ResultOrError<std::string> ShaderModule::TranslateToGLSL(const char* entryPointName, |
| SingleShaderStage stage, |
| CombinedSamplerInfo* combinedSamplers, |
| const PipelineLayout* layout, |
| bool* needsDummySampler) const { |
| tint::transform::SingleEntryPoint singleEntryPointTransform; |
| |
| tint::transform::DataMap transformInputs; |
| transformInputs.Add<tint::transform::SingleEntryPoint::Config>(entryPointName); |
| |
| tint::Program program; |
| DAWN_TRY_ASSIGN(program, RunTransforms(&singleEntryPointTransform, GetTintProgram(), |
| transformInputs, nullptr, nullptr)); |
| |
| tint::writer::spirv::Options tintOptions; |
| tintOptions.disable_workgroup_init = |
| GetDevice()->IsToggleEnabled(Toggle::DisableWorkgroupInit); |
| auto result = tint::writer::spirv::Generate(&program, tintOptions); |
| if (!result.success) { |
| std::ostringstream errorStream; |
| errorStream << "Generator: " << result.error << std::endl; |
| return DAWN_VALIDATION_ERROR(errorStream.str().c_str()); |
| } |
| |
| std::vector<uint32_t> spirv = std::move(result.spirv); |
| DAWN_TRY( |
| ValidateSpirv(GetDevice(), spirv, GetDevice()->IsToggleEnabled(Toggle::DumpShaders))); |
| |
| // If these options are changed, the values in DawnSPIRVCrossGLSLFastFuzzer.cpp need to |
| // be updated. |
| spirv_cross::CompilerGLSL::Options options; |
| |
| // The range of Z-coordinate in the clipping volume of OpenGL is [-w, w], while it is |
| // [0, w] in D3D12, Metal and Vulkan, so we should normalize it in shaders in all |
| // backends. See the documentation of |
| // spirv_cross::CompilerGLSL::Options::vertex::fixup_clipspace for more details. |
| options.vertex.flip_vert_y = true; |
| options.vertex.fixup_clipspace = true; |
| |
| const OpenGLVersion& version = ToBackend(GetDevice())->gl.GetVersion(); |
| if (version.IsDesktop()) { |
| // The computation of GLSL version below only works for 3.3 and above. |
| ASSERT(version.IsAtLeast(3, 3)); |
| } |
| options.es = version.IsES(); |
| options.version = version.GetMajor() * 100 + version.GetMinor() * 10; |
| |
| spirv_cross::CompilerGLSL compiler(std::move(spirv)); |
| compiler.set_common_options(options); |
| compiler.set_entry_point(entryPointName, ShaderStageToExecutionModel(stage)); |
| |
| // Analyzes all OpImageFetch opcodes and checks if there are instances where |
| // said instruction is used without a combined image sampler. |
| // GLSL does not support texelFetch without a sampler. |
| // To workaround this, we must inject a dummy sampler which can be used to form a sampler2D |
| // at the call-site of texelFetch as necessary. |
| spirv_cross::VariableID dummySamplerId = compiler.build_dummy_sampler_for_combined_images(); |
| |
| // Extract bindings names so that it can be used to get its location in program. |
| // Now translate the separate sampler / textures into combined ones and store their info. We |
| // need to do this before removing the set and binding decorations. |
| compiler.build_combined_image_samplers(); |
| |
| for (const auto& combined : compiler.get_combined_image_samplers()) { |
| combinedSamplers->emplace_back(); |
| |
| CombinedSampler* info = &combinedSamplers->back(); |
| if (combined.sampler_id == dummySamplerId) { |
| *needsDummySampler = true; |
| info->useDummySampler = true; |
| info->samplerLocation = {}; |
| } else { |
| info->useDummySampler = false; |
| info->samplerLocation.group = BindGroupIndex( |
| compiler.get_decoration(combined.sampler_id, spv::DecorationDescriptorSet)); |
| info->samplerLocation.binding = BindingNumber( |
| compiler.get_decoration(combined.sampler_id, spv::DecorationBinding)); |
| } |
| info->textureLocation.group = BindGroupIndex( |
| compiler.get_decoration(combined.image_id, spv::DecorationDescriptorSet)); |
| info->textureLocation.binding = |
| BindingNumber(compiler.get_decoration(combined.image_id, spv::DecorationBinding)); |
| compiler.set_name(combined.combined_id, info->GetName()); |
| } |
| |
| const BindingInfoArray& bindingInfo = *(mGLBindings.at(entryPointName)); |
| |
| // Change binding names to be "dawn_binding_<group>_<binding>". |
| // Also unsets the SPIRV "Binding" decoration as it outputs "layout(binding=)" which |
| // isn't supported on OSX's OpenGL. |
| const PipelineLayout::BindingIndexInfo& indices = layout->GetBindingIndexInfo(); |
| |
| // Modify the decoration of variables so that SPIRV-Cross outputs only |
| // layout(binding=<index>) for interface variables. |
| // |
| // When the use_tint_generator toggle is on, Tint is used for the reflection of bindings |
| // for the implicit pipeline layout and pipeline/layout validation, but bindingInfo is set |
| // to mGLEntryPoints which is the SPIRV-Cross reflection. Tint reflects bindings used more |
| // precisely than SPIRV-Cross so some bindings in bindingInfo might not exist in the layout |
| // and querying the layout for them would cause an ASSERT. That's why we defensively check |
| // that bindings are in the layout before modifying them. This slight hack is ok because in |
| // the long term we will use Tint to produce GLSL. |
| for (BindGroupIndex group : IterateBitSet(layout->GetBindGroupLayoutsMask())) { |
| for (const auto& it : bindingInfo[group]) { |
| const BindGroupLayoutBase* bgl = layout->GetBindGroupLayout(group); |
| BindingNumber bindingNumber = it.first; |
| const auto& info = it.second; |
| |
| if (!bgl->HasBinding(bindingNumber)) { |
| continue; |
| } |
| |
| // Remove the name of the base type. This works around an issue where if the SPIRV |
| // has two uniform/storage interface variables that point to the same base type, |
| // then SPIRV-Cross would emit two bindings with type names that conflict: |
| // |
| // layout(binding=0) uniform Buf {...} binding0; |
| // layout(binding=1) uniform Buf {...} binding1; |
| compiler.set_name(info.base_type_id, ""); |
| |
| BindingIndex bindingIndex = bgl->GetBindingIndex(bindingNumber); |
| |
| compiler.unset_decoration(info.id, spv::DecorationDescriptorSet); |
| compiler.set_decoration(info.id, spv::DecorationBinding, |
| indices[group][bindingIndex]); |
| } |
| } |
| |
| std::string glsl = compiler.compile(); |
| |
| if (GetDevice()->IsToggleEnabled(Toggle::DumpShaders)) { |
| std::ostringstream dumpedMsg; |
| dumpedMsg << "/* Dumped generated GLSL */" << std::endl << glsl; |
| |
| GetDevice()->EmitLog(WGPULoggingType_Info, dumpedMsg.str().c_str()); |
| } |
| |
| return glsl; |
| } |
| |
| }} // namespace dawn_native::opengl |
