| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "impeller/renderer/device_buffer.h" |
| |
| namespace impeller { |
| |
| DeviceBuffer::DeviceBuffer(DeviceBufferDescriptor desc) |
| : desc_(std::move(desc)) {} |
| |
| DeviceBuffer::~DeviceBuffer() = default; |
| |
| // |Buffer| |
| std::shared_ptr<const DeviceBuffer> DeviceBuffer::GetDeviceBuffer( |
| Allocator& allocator) const { |
| return shared_from_this(); |
| } |
| |
| BufferView DeviceBuffer::AsBufferView() const { |
| BufferView view; |
| view.buffer = shared_from_this(); |
| view.range = {0u, desc_.size}; |
| return view; |
| } |
| |
| [[nodiscard]] bool DeviceBuffer::CopyHostBuffer(const uint8_t* source, |
| Range source_range, |
| size_t offset) { |
| if (source_range.length == 0u) { |
| // Nothing to copy. Bail. |
| return true; |
| } |
| |
| if (source == nullptr) { |
| // Attempted to copy data from a null buffer. |
| return false; |
| } |
| |
| if (desc_.storage_mode != StorageMode::kHostVisible) { |
| // One of the storage modes where a transfer queue must be used. |
| return false; |
| } |
| |
| if (offset + source_range.length > desc_.size) { |
| // Out of bounds of this buffer. |
| return false; |
| } |
| |
| return OnCopyHostBuffer(source, source_range, offset); |
| } |
| |
| } // namespace impeller |