| // 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 { namespace 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 |