// 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 DAWNNATIVE_METAL_COMPUTEPIPELINEMTL_H_
#define DAWNNATIVE_METAL_COMPUTEPIPELINEMTL_H_

#include "dawn_native/ComputePipeline.h"

#include "common/NSRef.h"

#import <Metal/Metal.h>

namespace dawn_native { namespace metal {

    class Device;

    class ComputePipeline final : public ComputePipelineBase {
      public:
        static ResultOrError<Ref<ComputePipeline>> Create(
            Device* device,
            const ComputePipelineDescriptor* descriptor);
        static void CreateAsync(Device* device,
                                std::unique_ptr<FlatComputePipelineDescriptor> descriptor,
                                size_t blueprintHash,
                                WGPUCreateComputePipelineAsyncCallback callback,
                                void* userdata);

        void Encode(id<MTLComputeCommandEncoder> encoder);
        MTLSize GetLocalWorkGroupSize() const;
        bool RequiresStorageBufferLength() const;

      private:
        using ComputePipelineBase::ComputePipelineBase;
        MaybeError Initialize(const ComputePipelineDescriptor* descriptor) override;

        NSPRef<id<MTLComputePipelineState>> mMtlComputePipelineState;
        MTLSize mLocalWorkgroupSize;
        bool mRequiresStorageBufferLength;
    };

}}  // namespace dawn_native::metal

#endif  // DAWNNATIVE_METAL_COMPUTEPIPELINEMTL_H_