| /* |
| * Copyright (C) 2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "InMemoryDisplayList.h" |
| |
| #include "DisplayListIterator.h" |
| |
| namespace WebCore { |
| namespace DisplayList { |
| |
| std::optional<std::size_t> InMemoryDisplayList::WritingClient::requiredSizeForItem(const DisplayListItem& displayListItem) const |
| { |
| return paddedSizeOfTypeAndItemInBytes(displayListItem); |
| } |
| |
| void InMemoryDisplayList::WritingClient::encodeItemInline(const DisplayListItem& displayListItem, uint8_t* location) const |
| { |
| safeCopy({ location }, displayListItem); |
| } |
| |
| std::optional<ItemHandle> WARN_UNUSED_RETURN InMemoryDisplayList::ReadingClient::decodeItem(const uint8_t* data, size_t dataLength, ItemType type, uint8_t* handleLocation) |
| { |
| const ItemHandle dataHandle { const_cast<uint8_t*>(data) }; |
| ASSERT_UNUSED(dataLength, dataLength >= paddedSizeOfTypeAndItemInBytes(dataHandle.type())); |
| ItemHandle result { handleLocation }; |
| if (dataHandle.safeCopy(type, result)) |
| return result; |
| return std::nullopt; |
| } |
| |
| InMemoryDisplayList::InMemoryDisplayList() |
| : m_writingClient(makeUnique<WritingClient>()) |
| , m_readingClient(makeUnique<ReadingClient>()) |
| { |
| setItemBufferWritingClient(m_writingClient.get()); |
| setItemBufferReadingClient(m_readingClient.get()); |
| } |
| |
| InMemoryDisplayList::~InMemoryDisplayList() |
| { |
| auto end = this->end(); |
| for (auto displayListItem : *this) { |
| auto item = displayListItem->item; |
| ASSERT(item); |
| if (!item) |
| break; |
| item.destroy(); |
| } |
| } |
| |
| } |
| } |