blob: 6bb706d8bb98b1cd383b9913f707778732599ffc [file] [log] [blame]
// 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_(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.contents = OnGetContents();
view.range = {0u, desc_.size};
return view;
}
std::shared_ptr<Texture> DeviceBuffer::AsTexture(
Allocator& allocator,
const TextureDescriptor& descriptor,
uint16_t row_bytes) const {
auto texture = allocator.CreateTexture(descriptor);
if (!texture) {
return nullptr;
}
if (!texture->SetContents(std::make_shared<fml::NonOwnedMapping>(
OnGetContents(), desc_.size))) {
return nullptr;
}
return texture;
}
[[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