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// 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.
#ifndef SRC_DAWN_NATIVE_METAL_RENDERPIPELINEMTL_H_
#define SRC_DAWN_NATIVE_METAL_RENDERPIPELINEMTL_H_
#include "dawn/native/RenderPipeline.h"
#include "dawn/common/NSRef.h"
#import <Metal/Metal.h>
namespace dawn::native::metal {
class Device;
class RenderPipeline final : public RenderPipelineBase {
public:
static Ref<RenderPipelineBase> CreateUninitialized(Device* device,
const RenderPipelineDescriptor* descriptor);
static void InitializeAsync(Ref<RenderPipelineBase> renderPipeline,
WGPUCreateRenderPipelineAsyncCallback callback,
void* userdata);
RenderPipeline(DeviceBase* device, const RenderPipelineDescriptor* descriptor);
~RenderPipeline() override;
MTLPrimitiveType GetMTLPrimitiveTopology() const;
MTLWinding GetMTLFrontFace() const;
MTLCullMode GetMTLCullMode() const;
void Encode(id<MTLRenderCommandEncoder> encoder);
id<MTLDepthStencilState> GetMTLDepthStencilState();
// For each Dawn vertex buffer, give the index in which it will be positioned in the Metal
// vertex buffer table.
uint32_t GetMtlVertexBufferIndex(VertexBufferSlot slot) const;
wgpu::ShaderStage GetStagesRequiringStorageBufferLength() const;
MaybeError Initialize() override;
private:
using RenderPipelineBase::RenderPipelineBase;
NSRef<MTLVertexDescriptor> MakeVertexDesc() const;
MTLPrimitiveType mMtlPrimitiveTopology;
MTLWinding mMtlFrontFace;
MTLCullMode mMtlCullMode;
NSPRef<id<MTLRenderPipelineState>> mMtlRenderPipelineState;
NSPRef<id<MTLDepthStencilState>> mMtlDepthStencilState;
ityp::array<VertexBufferSlot, uint32_t, kMaxVertexBuffers> mMtlVertexBufferIndices;
wgpu::ShaderStage mStagesRequiringStorageBufferLength = wgpu::ShaderStage::None;
};
} // namespace dawn::native::metal
#endif // SRC_DAWN_NATIVE_METAL_RENDERPIPELINEMTL_H_