| // 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/metal/RenderPipelineMTL.h" |
| |
| #include "common/VertexFormatUtils.h" |
| #include "dawn_native/metal/DeviceMTL.h" |
| #include "dawn_native/metal/PipelineLayoutMTL.h" |
| #include "dawn_native/metal/ShaderModuleMTL.h" |
| #include "dawn_native/metal/TextureMTL.h" |
| #include "dawn_native/metal/UtilsMetal.h" |
| |
| namespace dawn_native { namespace metal { |
| |
| namespace { |
| MTLVertexFormat VertexFormatType(wgpu::VertexFormat format) { |
| switch (format) { |
| case wgpu::VertexFormat::Uint8x2: |
| return MTLVertexFormatUChar2; |
| case wgpu::VertexFormat::Uint8x4: |
| return MTLVertexFormatUChar4; |
| case wgpu::VertexFormat::Sint8x2: |
| return MTLVertexFormatChar2; |
| case wgpu::VertexFormat::Sint8x4: |
| return MTLVertexFormatChar4; |
| case wgpu::VertexFormat::Unorm8x2: |
| return MTLVertexFormatUChar2Normalized; |
| case wgpu::VertexFormat::Unorm8x4: |
| return MTLVertexFormatUChar4Normalized; |
| case wgpu::VertexFormat::Snorm8x2: |
| return MTLVertexFormatChar2Normalized; |
| case wgpu::VertexFormat::Snorm8x4: |
| return MTLVertexFormatChar4Normalized; |
| case wgpu::VertexFormat::Uint16x2: |
| return MTLVertexFormatUShort2; |
| case wgpu::VertexFormat::Uint16x4: |
| return MTLVertexFormatUShort4; |
| case wgpu::VertexFormat::Sint16x2: |
| return MTLVertexFormatShort2; |
| case wgpu::VertexFormat::Sint16x4: |
| return MTLVertexFormatShort4; |
| case wgpu::VertexFormat::Unorm16x2: |
| return MTLVertexFormatUShort2Normalized; |
| case wgpu::VertexFormat::Unorm16x4: |
| return MTLVertexFormatUShort4Normalized; |
| case wgpu::VertexFormat::Snorm16x2: |
| return MTLVertexFormatShort2Normalized; |
| case wgpu::VertexFormat::Snorm16x4: |
| return MTLVertexFormatShort4Normalized; |
| case wgpu::VertexFormat::Float16x2: |
| return MTLVertexFormatHalf2; |
| case wgpu::VertexFormat::Float16x4: |
| return MTLVertexFormatHalf4; |
| case wgpu::VertexFormat::Float32: |
| return MTLVertexFormatFloat; |
| case wgpu::VertexFormat::Float32x2: |
| return MTLVertexFormatFloat2; |
| case wgpu::VertexFormat::Float32x3: |
| return MTLVertexFormatFloat3; |
| case wgpu::VertexFormat::Float32x4: |
| return MTLVertexFormatFloat4; |
| case wgpu::VertexFormat::Uint32: |
| return MTLVertexFormatUInt; |
| case wgpu::VertexFormat::Uint32x2: |
| return MTLVertexFormatUInt2; |
| case wgpu::VertexFormat::Uint32x3: |
| return MTLVertexFormatUInt3; |
| case wgpu::VertexFormat::Uint32x4: |
| return MTLVertexFormatUInt4; |
| case wgpu::VertexFormat::Sint32: |
| return MTLVertexFormatInt; |
| case wgpu::VertexFormat::Sint32x2: |
| return MTLVertexFormatInt2; |
| case wgpu::VertexFormat::Sint32x3: |
| return MTLVertexFormatInt3; |
| case wgpu::VertexFormat::Sint32x4: |
| return MTLVertexFormatInt4; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| MTLVertexStepFunction InputStepModeFunction(wgpu::InputStepMode mode) { |
| switch (mode) { |
| case wgpu::InputStepMode::Vertex: |
| return MTLVertexStepFunctionPerVertex; |
| case wgpu::InputStepMode::Instance: |
| return MTLVertexStepFunctionPerInstance; |
| } |
| } |
| |
| MTLPrimitiveType MTLPrimitiveTopology(wgpu::PrimitiveTopology primitiveTopology) { |
| switch (primitiveTopology) { |
| case wgpu::PrimitiveTopology::PointList: |
| return MTLPrimitiveTypePoint; |
| case wgpu::PrimitiveTopology::LineList: |
| return MTLPrimitiveTypeLine; |
| case wgpu::PrimitiveTopology::LineStrip: |
| return MTLPrimitiveTypeLineStrip; |
| case wgpu::PrimitiveTopology::TriangleList: |
| return MTLPrimitiveTypeTriangle; |
| case wgpu::PrimitiveTopology::TriangleStrip: |
| return MTLPrimitiveTypeTriangleStrip; |
| } |
| } |
| |
| MTLPrimitiveTopologyClass MTLInputPrimitiveTopology( |
| wgpu::PrimitiveTopology primitiveTopology) { |
| switch (primitiveTopology) { |
| case wgpu::PrimitiveTopology::PointList: |
| return MTLPrimitiveTopologyClassPoint; |
| case wgpu::PrimitiveTopology::LineList: |
| case wgpu::PrimitiveTopology::LineStrip: |
| return MTLPrimitiveTopologyClassLine; |
| case wgpu::PrimitiveTopology::TriangleList: |
| case wgpu::PrimitiveTopology::TriangleStrip: |
| return MTLPrimitiveTopologyClassTriangle; |
| } |
| } |
| |
| MTLBlendFactor MetalBlendFactor(wgpu::BlendFactor factor, bool alpha) { |
| switch (factor) { |
| case wgpu::BlendFactor::Zero: |
| return MTLBlendFactorZero; |
| case wgpu::BlendFactor::One: |
| return MTLBlendFactorOne; |
| case wgpu::BlendFactor::Src: |
| return MTLBlendFactorSourceColor; |
| case wgpu::BlendFactor::OneMinusSrc: |
| return MTLBlendFactorOneMinusSourceColor; |
| case wgpu::BlendFactor::SrcAlpha: |
| return MTLBlendFactorSourceAlpha; |
| case wgpu::BlendFactor::OneMinusSrcAlpha: |
| return MTLBlendFactorOneMinusSourceAlpha; |
| case wgpu::BlendFactor::Dst: |
| return MTLBlendFactorDestinationColor; |
| case wgpu::BlendFactor::OneMinusDst: |
| return MTLBlendFactorOneMinusDestinationColor; |
| case wgpu::BlendFactor::DstAlpha: |
| return MTLBlendFactorDestinationAlpha; |
| case wgpu::BlendFactor::OneMinusDstAlpha: |
| return MTLBlendFactorOneMinusDestinationAlpha; |
| case wgpu::BlendFactor::SrcAlphaSaturated: |
| return MTLBlendFactorSourceAlphaSaturated; |
| case wgpu::BlendFactor::Constant: |
| return alpha ? MTLBlendFactorBlendAlpha : MTLBlendFactorBlendColor; |
| case wgpu::BlendFactor::OneMinusConstant: |
| return alpha ? MTLBlendFactorOneMinusBlendAlpha |
| : MTLBlendFactorOneMinusBlendColor; |
| |
| // Deprecated blend factors should be normalized prior to this call. |
| case wgpu::BlendFactor::SrcColor: |
| case wgpu::BlendFactor::OneMinusSrcColor: |
| case wgpu::BlendFactor::DstColor: |
| case wgpu::BlendFactor::OneMinusDstColor: |
| case wgpu::BlendFactor::BlendColor: |
| case wgpu::BlendFactor::OneMinusBlendColor: |
| UNREACHABLE(); |
| } |
| } |
| |
| MTLBlendOperation MetalBlendOperation(wgpu::BlendOperation operation) { |
| switch (operation) { |
| case wgpu::BlendOperation::Add: |
| return MTLBlendOperationAdd; |
| case wgpu::BlendOperation::Subtract: |
| return MTLBlendOperationSubtract; |
| case wgpu::BlendOperation::ReverseSubtract: |
| return MTLBlendOperationReverseSubtract; |
| case wgpu::BlendOperation::Min: |
| return MTLBlendOperationMin; |
| case wgpu::BlendOperation::Max: |
| return MTLBlendOperationMax; |
| } |
| } |
| |
| MTLColorWriteMask MetalColorWriteMask(wgpu::ColorWriteMask writeMask, |
| bool isDeclaredInFragmentShader) { |
| if (!isDeclaredInFragmentShader) { |
| return MTLColorWriteMaskNone; |
| } |
| |
| MTLColorWriteMask mask = MTLColorWriteMaskNone; |
| |
| if (writeMask & wgpu::ColorWriteMask::Red) { |
| mask |= MTLColorWriteMaskRed; |
| } |
| if (writeMask & wgpu::ColorWriteMask::Green) { |
| mask |= MTLColorWriteMaskGreen; |
| } |
| if (writeMask & wgpu::ColorWriteMask::Blue) { |
| mask |= MTLColorWriteMaskBlue; |
| } |
| if (writeMask & wgpu::ColorWriteMask::Alpha) { |
| mask |= MTLColorWriteMaskAlpha; |
| } |
| |
| return mask; |
| } |
| |
| void ComputeBlendDesc(MTLRenderPipelineColorAttachmentDescriptor* attachment, |
| const ColorTargetState* state, |
| bool isDeclaredInFragmentShader) { |
| attachment.blendingEnabled = state->blend != nullptr; |
| if (attachment.blendingEnabled) { |
| attachment.sourceRGBBlendFactor = |
| MetalBlendFactor(state->blend->color.srcFactor, false); |
| attachment.destinationRGBBlendFactor = |
| MetalBlendFactor(state->blend->color.dstFactor, false); |
| attachment.rgbBlendOperation = MetalBlendOperation(state->blend->color.operation); |
| attachment.sourceAlphaBlendFactor = |
| MetalBlendFactor(state->blend->alpha.srcFactor, true); |
| attachment.destinationAlphaBlendFactor = |
| MetalBlendFactor(state->blend->alpha.dstFactor, true); |
| attachment.alphaBlendOperation = MetalBlendOperation(state->blend->alpha.operation); |
| } |
| attachment.writeMask = |
| MetalColorWriteMask(state->writeMask, isDeclaredInFragmentShader); |
| } |
| |
| MTLStencilOperation MetalStencilOperation(wgpu::StencilOperation stencilOperation) { |
| switch (stencilOperation) { |
| case wgpu::StencilOperation::Keep: |
| return MTLStencilOperationKeep; |
| case wgpu::StencilOperation::Zero: |
| return MTLStencilOperationZero; |
| case wgpu::StencilOperation::Replace: |
| return MTLStencilOperationReplace; |
| case wgpu::StencilOperation::Invert: |
| return MTLStencilOperationInvert; |
| case wgpu::StencilOperation::IncrementClamp: |
| return MTLStencilOperationIncrementClamp; |
| case wgpu::StencilOperation::DecrementClamp: |
| return MTLStencilOperationDecrementClamp; |
| case wgpu::StencilOperation::IncrementWrap: |
| return MTLStencilOperationIncrementWrap; |
| case wgpu::StencilOperation::DecrementWrap: |
| return MTLStencilOperationDecrementWrap; |
| } |
| } |
| |
| NSRef<MTLDepthStencilDescriptor> MakeDepthStencilDesc(const DepthStencilState* descriptor) { |
| NSRef<MTLDepthStencilDescriptor> mtlDepthStencilDescRef = |
| AcquireNSRef([MTLDepthStencilDescriptor new]); |
| MTLDepthStencilDescriptor* mtlDepthStencilDescriptor = mtlDepthStencilDescRef.Get(); |
| |
| mtlDepthStencilDescriptor.depthCompareFunction = |
| ToMetalCompareFunction(descriptor->depthCompare); |
| mtlDepthStencilDescriptor.depthWriteEnabled = descriptor->depthWriteEnabled; |
| |
| if (StencilTestEnabled(descriptor)) { |
| NSRef<MTLStencilDescriptor> backFaceStencilRef = |
| AcquireNSRef([MTLStencilDescriptor new]); |
| MTLStencilDescriptor* backFaceStencil = backFaceStencilRef.Get(); |
| NSRef<MTLStencilDescriptor> frontFaceStencilRef = |
| AcquireNSRef([MTLStencilDescriptor new]); |
| MTLStencilDescriptor* frontFaceStencil = frontFaceStencilRef.Get(); |
| |
| backFaceStencil.stencilCompareFunction = |
| ToMetalCompareFunction(descriptor->stencilBack.compare); |
| backFaceStencil.stencilFailureOperation = |
| MetalStencilOperation(descriptor->stencilBack.failOp); |
| backFaceStencil.depthFailureOperation = |
| MetalStencilOperation(descriptor->stencilBack.depthFailOp); |
| backFaceStencil.depthStencilPassOperation = |
| MetalStencilOperation(descriptor->stencilBack.passOp); |
| backFaceStencil.readMask = descriptor->stencilReadMask; |
| backFaceStencil.writeMask = descriptor->stencilWriteMask; |
| |
| frontFaceStencil.stencilCompareFunction = |
| ToMetalCompareFunction(descriptor->stencilFront.compare); |
| frontFaceStencil.stencilFailureOperation = |
| MetalStencilOperation(descriptor->stencilFront.failOp); |
| frontFaceStencil.depthFailureOperation = |
| MetalStencilOperation(descriptor->stencilFront.depthFailOp); |
| frontFaceStencil.depthStencilPassOperation = |
| MetalStencilOperation(descriptor->stencilFront.passOp); |
| frontFaceStencil.readMask = descriptor->stencilReadMask; |
| frontFaceStencil.writeMask = descriptor->stencilWriteMask; |
| |
| mtlDepthStencilDescriptor.backFaceStencil = backFaceStencil; |
| mtlDepthStencilDescriptor.frontFaceStencil = frontFaceStencil; |
| } |
| |
| return mtlDepthStencilDescRef; |
| } |
| |
| MTLWinding MTLFrontFace(wgpu::FrontFace face) { |
| switch (face) { |
| case wgpu::FrontFace::CW: |
| return MTLWindingClockwise; |
| case wgpu::FrontFace::CCW: |
| return MTLWindingCounterClockwise; |
| } |
| } |
| |
| MTLCullMode ToMTLCullMode(wgpu::CullMode mode) { |
| switch (mode) { |
| case wgpu::CullMode::None: |
| return MTLCullModeNone; |
| case wgpu::CullMode::Front: |
| return MTLCullModeFront; |
| case wgpu::CullMode::Back: |
| return MTLCullModeBack; |
| } |
| } |
| |
| } // anonymous namespace |
| |
| // static |
| ResultOrError<Ref<RenderPipeline>> RenderPipeline::Create( |
| Device* device, |
| const RenderPipelineDescriptor* descriptor) { |
| Ref<RenderPipeline> pipeline = AcquireRef(new RenderPipeline(device, descriptor)); |
| DAWN_TRY(pipeline->Initialize(descriptor)); |
| return pipeline; |
| } |
| |
| MaybeError RenderPipeline::Initialize(const RenderPipelineDescriptor* descriptor) { |
| mMtlPrimitiveTopology = MTLPrimitiveTopology(GetPrimitiveTopology()); |
| mMtlFrontFace = MTLFrontFace(GetFrontFace()); |
| mMtlCullMode = ToMTLCullMode(GetCullMode()); |
| auto mtlDevice = ToBackend(GetDevice())->GetMTLDevice(); |
| |
| NSRef<MTLRenderPipelineDescriptor> descriptorMTLRef = |
| AcquireNSRef([MTLRenderPipelineDescriptor new]); |
| MTLRenderPipelineDescriptor* descriptorMTL = descriptorMTLRef.Get(); |
| |
| // TODO: MakeVertexDesc should be const in the future, so we don't need to call it here when |
| // vertex pulling is enabled |
| NSRef<MTLVertexDescriptor> vertexDesc = MakeVertexDesc(); |
| |
| // Calling MakeVertexDesc first is important since it sets indices for packed bindings |
| if (GetDevice()->IsToggleEnabled(Toggle::MetalEnableVertexPulling)) { |
| vertexDesc = AcquireNSRef([MTLVertexDescriptor new]); |
| } |
| descriptorMTL.vertexDescriptor = vertexDesc.Get(); |
| |
| ShaderModule* vertexModule = ToBackend(descriptor->vertex.module); |
| const char* vertexEntryPoint = descriptor->vertex.entryPoint; |
| ShaderModule::MetalFunctionData vertexData; |
| |
| const VertexState* vertexStatePtr = &descriptor->vertex; |
| VertexState vertexState; |
| if (vertexStatePtr == nullptr) { |
| vertexState = {}; |
| vertexStatePtr = &vertexState; |
| } |
| |
| DAWN_TRY(vertexModule->CreateFunction(vertexEntryPoint, SingleShaderStage::Vertex, |
| ToBackend(GetLayout()), &vertexData, 0xFFFFFFFF, this, |
| vertexStatePtr)); |
| |
| descriptorMTL.vertexFunction = vertexData.function.Get(); |
| if (vertexData.needsStorageBufferLength) { |
| mStagesRequiringStorageBufferLength |= wgpu::ShaderStage::Vertex; |
| } |
| |
| ShaderModule* fragmentModule = ToBackend(descriptor->fragment->module); |
| const char* fragmentEntryPoint = descriptor->fragment->entryPoint; |
| ShaderModule::MetalFunctionData fragmentData; |
| DAWN_TRY(fragmentModule->CreateFunction(fragmentEntryPoint, SingleShaderStage::Fragment, |
| ToBackend(GetLayout()), &fragmentData, |
| GetSampleMask())); |
| |
| descriptorMTL.fragmentFunction = fragmentData.function.Get(); |
| if (fragmentData.needsStorageBufferLength) { |
| mStagesRequiringStorageBufferLength |= wgpu::ShaderStage::Fragment; |
| } |
| |
| if (HasDepthStencilAttachment()) { |
| wgpu::TextureFormat depthStencilFormat = GetDepthStencilFormat(); |
| const Format& internalFormat = GetDevice()->GetValidInternalFormat(depthStencilFormat); |
| MTLPixelFormat metalFormat = MetalPixelFormat(depthStencilFormat); |
| |
| if (internalFormat.HasDepth()) { |
| descriptorMTL.depthAttachmentPixelFormat = metalFormat; |
| } |
| if (internalFormat.HasStencil()) { |
| descriptorMTL.stencilAttachmentPixelFormat = metalFormat; |
| } |
| } |
| |
| const auto& fragmentOutputsWritten = |
| GetStage(SingleShaderStage::Fragment).metadata->fragmentOutputsWritten; |
| for (ColorAttachmentIndex i : IterateBitSet(GetColorAttachmentsMask())) { |
| descriptorMTL.colorAttachments[static_cast<uint8_t>(i)].pixelFormat = |
| MetalPixelFormat(GetColorAttachmentFormat(i)); |
| const ColorTargetState* descriptor = GetColorTargetState(i); |
| ComputeBlendDesc(descriptorMTL.colorAttachments[static_cast<uint8_t>(i)], descriptor, |
| fragmentOutputsWritten[i]); |
| } |
| |
| descriptorMTL.inputPrimitiveTopology = MTLInputPrimitiveTopology(GetPrimitiveTopology()); |
| descriptorMTL.sampleCount = GetSampleCount(); |
| descriptorMTL.alphaToCoverageEnabled = IsAlphaToCoverageEnabled(); |
| |
| { |
| NSError* error = nullptr; |
| mMtlRenderPipelineState = |
| AcquireNSPRef([mtlDevice newRenderPipelineStateWithDescriptor:descriptorMTL |
| error:&error]); |
| if (error != nullptr) { |
| NSLog(@" error => %@", error); |
| return DAWN_INTERNAL_ERROR("Error creating rendering pipeline state"); |
| } |
| } |
| |
| // Create depth stencil state and cache it, fetch the cached depth stencil state when we |
| // call setDepthStencilState() for a given render pipeline in CommandEncoder, in order to |
| // improve performance. |
| NSRef<MTLDepthStencilDescriptor> depthStencilDesc = |
| MakeDepthStencilDesc(GetDepthStencilState()); |
| mMtlDepthStencilState = |
| AcquireNSPRef([mtlDevice newDepthStencilStateWithDescriptor:depthStencilDesc.Get()]); |
| |
| return {}; |
| } |
| |
| MTLPrimitiveType RenderPipeline::GetMTLPrimitiveTopology() const { |
| return mMtlPrimitiveTopology; |
| } |
| |
| MTLWinding RenderPipeline::GetMTLFrontFace() const { |
| return mMtlFrontFace; |
| } |
| |
| MTLCullMode RenderPipeline::GetMTLCullMode() const { |
| return mMtlCullMode; |
| } |
| |
| void RenderPipeline::Encode(id<MTLRenderCommandEncoder> encoder) { |
| [encoder setRenderPipelineState:mMtlRenderPipelineState.Get()]; |
| } |
| |
| id<MTLDepthStencilState> RenderPipeline::GetMTLDepthStencilState() { |
| return mMtlDepthStencilState.Get(); |
| } |
| |
| uint32_t RenderPipeline::GetMtlVertexBufferIndex(VertexBufferSlot slot) const { |
| ASSERT(slot < kMaxVertexBuffersTyped); |
| return mMtlVertexBufferIndices[slot]; |
| } |
| |
| wgpu::ShaderStage RenderPipeline::GetStagesRequiringStorageBufferLength() const { |
| return mStagesRequiringStorageBufferLength; |
| } |
| |
| MTLVertexDescriptor* RenderPipeline::MakeVertexDesc() { |
| MTLVertexDescriptor* mtlVertexDescriptor = [MTLVertexDescriptor new]; |
| |
| // Vertex buffers are packed after all the buffers for the bind groups. |
| uint32_t mtlVertexBufferIndex = |
| ToBackend(GetLayout())->GetBufferBindingCount(SingleShaderStage::Vertex); |
| |
| for (VertexBufferSlot slot : IterateBitSet(GetVertexBufferSlotsUsed())) { |
| const VertexBufferInfo& info = GetVertexBuffer(slot); |
| |
| MTLVertexBufferLayoutDescriptor* layoutDesc = [MTLVertexBufferLayoutDescriptor new]; |
| if (info.arrayStride == 0) { |
| // For MTLVertexStepFunctionConstant, the stepRate must be 0, |
| // but the arrayStride must NOT be 0, so we made up it with |
| // max(attrib.offset + sizeof(attrib) for each attrib) |
| size_t maxArrayStride = 0; |
| for (VertexAttributeLocation loc : IterateBitSet(GetAttributeLocationsUsed())) { |
| const VertexAttributeInfo& attrib = GetAttribute(loc); |
| // Only use the attributes that use the current input |
| if (attrib.vertexBufferSlot != slot) { |
| continue; |
| } |
| maxArrayStride = |
| std::max(maxArrayStride, |
| dawn::VertexFormatSize(attrib.format) + size_t(attrib.offset)); |
| } |
| layoutDesc.stepFunction = MTLVertexStepFunctionConstant; |
| layoutDesc.stepRate = 0; |
| // Metal requires the stride must be a multiple of 4 bytes, align it with next |
| // multiple of 4 if it's not. |
| layoutDesc.stride = Align(maxArrayStride, 4); |
| } else { |
| layoutDesc.stepFunction = InputStepModeFunction(info.stepMode); |
| layoutDesc.stepRate = 1; |
| layoutDesc.stride = info.arrayStride; |
| } |
| |
| mtlVertexDescriptor.layouts[mtlVertexBufferIndex] = layoutDesc; |
| [layoutDesc release]; |
| |
| mMtlVertexBufferIndices[slot] = mtlVertexBufferIndex; |
| mtlVertexBufferIndex++; |
| } |
| |
| for (VertexAttributeLocation loc : IterateBitSet(GetAttributeLocationsUsed())) { |
| const VertexAttributeInfo& info = GetAttribute(loc); |
| |
| auto attribDesc = [MTLVertexAttributeDescriptor new]; |
| attribDesc.format = VertexFormatType(info.format); |
| attribDesc.offset = info.offset; |
| attribDesc.bufferIndex = mMtlVertexBufferIndices[info.vertexBufferSlot]; |
| mtlVertexDescriptor.attributes[static_cast<uint8_t>(loc)] = attribDesc; |
| [attribDesc release]; |
| } |
| |
| return mtlVertexDescriptor; |
| } |
| |
| }} // namespace dawn_native::metal |
