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// Copyright 2018 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/StagingBufferMTL.h"
#include "dawn/native/metal/DeviceMTL.h"
namespace dawn::native::metal {
StagingBuffer::StagingBuffer(size_t size, Device* device)
: StagingBufferBase(size), mDevice(device) {
}
MaybeError StagingBuffer::Initialize() {
const size_t bufferSize = GetSize();
mBuffer = AcquireNSPRef([mDevice->GetMTLDevice()
newBufferWithLength:bufferSize
options:MTLResourceStorageModeShared]);
if (mBuffer == nullptr) {
return DAWN_OUT_OF_MEMORY_ERROR("Unable to allocate buffer.");
}
mMappedPointer = [*mBuffer contents];
if (mMappedPointer == nullptr) {
return DAWN_INTERNAL_ERROR("Unable to map staging buffer.");
}
return {};
}
id<MTLBuffer> StagingBuffer::GetBufferHandle() const {
return mBuffer.Get();
}
} // namespace dawn::native::metal