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// Copyright 2020 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_COMMANDRECORDINGCONTEXT_H_
#define DAWNNATIVE_METAL_COMMANDRECORDINGCONTEXT_H_
#include "common/NSRef.h"
#include "common/NonCopyable.h"
#include "dawn_native/Error.h"
#import <Metal/Metal.h>
namespace dawn_native { namespace metal {
// This class wraps a MTLCommandBuffer and tracks which Metal encoder is open.
// Only one encoder may be open at a time.
class CommandRecordingContext : NonMovable {
public:
CommandRecordingContext();
~CommandRecordingContext();
id<MTLCommandBuffer> GetCommands();
void MarkUsed();
bool WasUsed() const;
MaybeError PrepareNextCommandBuffer(id<MTLCommandQueue> queue);
NSPRef<id<MTLCommandBuffer>> AcquireCommands();
id<MTLBlitCommandEncoder> EnsureBlit();
void EndBlit();
id<MTLComputeCommandEncoder> BeginCompute();
void EndCompute();
id<MTLRenderCommandEncoder> BeginRender(MTLRenderPassDescriptor* descriptor);
void EndRender();
private:
NSPRef<id<MTLCommandBuffer>> mCommands;
NSPRef<id<MTLBlitCommandEncoder>> mBlit;
NSPRef<id<MTLComputeCommandEncoder>> mCompute;
NSPRef<id<MTLRenderCommandEncoder>> mRender;
bool mInEncoder = false;
bool mUsed = false;
};
}} // namespace dawn_native::metal
#endif // DAWNNATIVE_METAL_COMMANDRECORDINGCONTEXT_H_