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/*
* Copyright (C) 2020-2022 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. AND ITS CONTRIBUTORS ``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 ITS 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 "RemoteImageBuffer.h"
#if ENABLE(GPU_PROCESS)
#include "IPCSemaphore.h"
#include "RemoteImageBufferMessages.h"
#include "RemoteRenderingBackend.h"
#include "StreamConnectionWorkQueue.h"
#include <WebCore/GraphicsContext.h>
#define MESSAGE_CHECK(assertion, message) do { \
if (UNLIKELY(!(assertion))) { \
m_backend->terminateWebProcess(message); \
return; \
} \
} while (0)
namespace WebKit {
Ref<RemoteImageBuffer> RemoteImageBuffer::create(Ref<WebCore::ImageBuffer> imageBuffer, RemoteRenderingBackend& backend)
{
auto instance = adoptRef(*new RemoteImageBuffer(WTFMove(imageBuffer), backend));
instance->startListeningForIPC();
return instance;
}
RemoteImageBuffer::RemoteImageBuffer(Ref<WebCore::ImageBuffer> imageBuffer, RemoteRenderingBackend& backend)
: m_backend(&backend)
, m_imageBuffer(WTFMove(imageBuffer))
{
}
RemoteImageBuffer::~RemoteImageBuffer()
{
// Volatile image buffers do not have contexts.
if (m_imageBuffer->volatilityState() == WebCore::VolatilityState::Volatile)
return;
if (!m_imageBuffer->hasBackend())
return;
// Unwind the context's state stack before destruction, since calls to restore may not have
// been flushed yet, or the web process may have terminated.
auto& context = m_imageBuffer->context();
while (context.stackSize())
context.restore();
}
void RemoteImageBuffer::startListeningForIPC()
{
m_backend->streamConnection().startReceivingMessages(*this, Messages::RemoteImageBuffer::messageReceiverName(), identifier().toUInt64());
}
void RemoteImageBuffer::stopListeningForIPC()
{
if (auto backend = std::exchange(m_backend, { }))
backend->streamConnection().stopReceivingMessages(Messages::RemoteImageBuffer::messageReceiverName(), identifier().toUInt64());
}
void RemoteImageBuffer::getPixelBuffer(WebCore::PixelBufferFormat destinationFormat, WebCore::IntRect srcRect, CompletionHandler<void()>&& completionHandler)
{
assertIsCurrent(workQueue());
auto memory = m_backend->sharedMemoryForGetPixelBuffer();
MESSAGE_CHECK(memory, "No shared memory for getPixelBufferForImageBuffer"_s);
MESSAGE_CHECK(WebCore::PixelBuffer::supportedPixelFormat(destinationFormat.pixelFormat), "Pixel format not supported"_s);
auto pixelBuffer = m_imageBuffer->getPixelBuffer(destinationFormat, srcRect);
if (pixelBuffer) {
MESSAGE_CHECK(pixelBuffer->sizeInBytes() <= memory->size(), "Shmem for return of getPixelBuffer is too small"_s);
memcpy(memory->data(), pixelBuffer->bytes(), pixelBuffer->sizeInBytes());
} else
memset(memory->data(), 0, memory->size());
completionHandler();
}
void RemoteImageBuffer::getPixelBufferWithNewMemory(WebCore::SharedMemory::Handle&& handle, WebCore::PixelBufferFormat destinationFormat, WebCore::IntRect srcRect, CompletionHandler<void()>&& completionHandler)
{
assertIsCurrent(workQueue());
m_backend->setSharedMemoryForGetPixelBuffer(nullptr);
auto sharedMemory = WebCore::SharedMemory::map(WTFMove(handle), WebCore::SharedMemory::Protection::ReadWrite);
MESSAGE_CHECK(sharedMemory, "Shared memory could not be mapped."_s);
m_backend->setSharedMemoryForGetPixelBuffer(WTFMove(sharedMemory));
getPixelBuffer(WTFMove(destinationFormat), WTFMove(srcRect), WTFMove(completionHandler));
}
void RemoteImageBuffer::putPixelBuffer(Ref<WebCore::PixelBuffer> pixelBuffer, WebCore::IntRect srcRect, WebCore::IntPoint destPoint, WebCore::AlphaPremultiplication destFormat)
{
assertIsCurrent(workQueue());
m_imageBuffer->putPixelBuffer(pixelBuffer, srcRect, destPoint, destFormat);
}
void RemoteImageBuffer::getShareableBitmap(WebCore::PreserveResolution preserveResolution, CompletionHandler<void(std::optional<WebCore::ShareableBitmap::Handle>&&)>&& completionHandler)
{
assertIsCurrent(workQueue());
std::optional<WebCore::ShareableBitmap::Handle> handle = [&]() -> std::optional<WebCore::ShareableBitmap::Handle> {
auto backendSize = m_imageBuffer->backendSize();
auto logicalSize = m_imageBuffer->logicalSize();
auto resultSize = preserveResolution == WebCore::PreserveResolution::Yes ? backendSize : m_imageBuffer->truncatedLogicalSize();
auto bitmap = WebCore::ShareableBitmap::create({ resultSize, m_imageBuffer->colorSpace() });
if (!bitmap)
return std::nullopt;
auto handle = bitmap->createHandle();
if (m_backend->resourceOwner())
handle->setOwnershipOfMemory(m_backend->resourceOwner(), WebCore::MemoryLedger::Graphics);
auto context = bitmap->createGraphicsContext();
if (!context)
return std::nullopt;
context->drawImageBuffer(m_imageBuffer.get(), WebCore::FloatRect { { }, resultSize }, WebCore::FloatRect { { }, logicalSize }, { WebCore::CompositeOperator::Copy });
return handle;
}();
completionHandler(WTFMove(handle));
}
void RemoteImageBuffer::filteredNativeImage(Ref<WebCore::Filter> filter, CompletionHandler<void(std::optional<WebCore::ShareableBitmap::Handle>&&)>&& completionHandler)
{
assertIsCurrent(workQueue());
std::optional<WebCore::ShareableBitmap::Handle> handle = [&]() -> std::optional<WebCore::ShareableBitmap::Handle> {
auto image = m_imageBuffer->filteredNativeImage(filter);
if (!image)
return std::nullopt;
auto imageSize = image->size();
auto bitmap = WebCore::ShareableBitmap::create({ imageSize, m_imageBuffer->colorSpace() });
if (!bitmap)
return std::nullopt;
auto handle = bitmap->createHandle();
if (m_backend->resourceOwner())
handle->setOwnershipOfMemory(m_backend->resourceOwner(), WebCore::MemoryLedger::Graphics);
auto context = bitmap->createGraphicsContext();
if (!context)
return std::nullopt;
context->drawNativeImage(*image, WebCore::FloatRect { { }, imageSize }, WebCore::FloatRect { { }, imageSize });
return handle;
}();
completionHandler(WTFMove(handle));
}
void RemoteImageBuffer::convertToLuminanceMask()
{
assertIsCurrent(workQueue());
m_imageBuffer->convertToLuminanceMask();
}
void RemoteImageBuffer::transformToColorSpace(const WebCore::DestinationColorSpace& colorSpace)
{
assertIsCurrent(workQueue());
m_imageBuffer->transformToColorSpace(colorSpace);
}
void RemoteImageBuffer::flushContext()
{
assertIsCurrent(workQueue());
m_imageBuffer->flushDrawingContext();
}
void RemoteImageBuffer::flushContextSync(CompletionHandler<void()>&& completionHandler)
{
assertIsCurrent(workQueue());
m_imageBuffer->flushDrawingContext();
completionHandler();
}
#if ENABLE(RE_DYNAMIC_CONTENT_SCALING)
void RemoteImageBuffer::dynamicContentScalingDisplayList(CompletionHandler<void(std::optional<WebCore::DynamicContentScalingDisplayList>&&)>&& completionHandler)
{
assertIsCurrent(workQueue());
auto displayList = m_imageBuffer->dynamicContentScalingDisplayList();
completionHandler({ WTFMove(displayList) });
}
#endif
IPC::StreamConnectionWorkQueue& RemoteImageBuffer::workQueue() const
{
return m_backend->workQueue();
}
#undef MESSAGE_CHECK
} // namespace WebKit
#endif // ENABLE(GPU_PROCESS)
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