ConcreteImageBuffer.h [plain text]
#pragma once
#include "ImageBuffer.h"
#include "ImageData.h"
namespace WebCore {
template<typename BackendType>
class ConcreteImageBuffer : public ImageBuffer {
public:
template<typename ImageBufferType = ConcreteImageBuffer, typename... Arguments>
static RefPtr<ImageBufferType> create(const FloatSize& size, float resolutionScale, ColorSpace colorSpace, PixelFormat pixelFormat, const HostWindow* hostWindow, Arguments&&... arguments)
{
auto parameters = ImageBufferBackend::Parameters { size, resolutionScale, colorSpace, pixelFormat };
auto backend = BackendType::create(parameters, hostWindow);
if (!backend)
return nullptr;
return adoptRef(new ImageBufferType(parameters, WTFMove(backend), std::forward<Arguments>(arguments)...));
}
template<typename ImageBufferType = ConcreteImageBuffer, typename... Arguments>
static RefPtr<ImageBufferType> create(const FloatSize& size, const GraphicsContext& context, Arguments&&... arguments)
{
auto parameters = ImageBufferBackend::Parameters { size, 1, ColorSpace::SRGB, PixelFormat::BGRA8 };
auto backend = BackendType::create(parameters, context);
if (!backend)
return nullptr;
return adoptRef(new ImageBufferType(parameters, WTFMove(backend), std::forward<Arguments>(arguments)...));
}
RenderingMode renderingMode() const override { return BackendType::renderingMode; }
bool canMapBackingStore() const override { return BackendType::canMapBackingStore; }
protected:
ConcreteImageBuffer(const ImageBufferBackend::Parameters& parameters, std::unique_ptr<BackendType>&& backend = nullptr, RenderingResourceIdentifier renderingResourceIdentifier = RenderingResourceIdentifier::generate())
: m_parameters(parameters)
, m_backend(WTFMove(backend))
, m_renderingResourceIdentifier(renderingResourceIdentifier)
{
}
void setBackend(std::unique_ptr<ImageBufferBackend>&& backend) override
{
ASSERT(!m_backend);
m_backend = std::unique_ptr<BackendType> { static_cast<BackendType*>(backend.release()) };
}
void clearBackend() override { m_backend = nullptr; }
ImageBufferBackend* ensureBackendCreated() const override { return m_backend.get(); }
RenderingResourceIdentifier renderingResourceIdentifier() const override { return m_renderingResourceIdentifier; }
GraphicsContext& context() const override
{
ASSERT(m_backend);
return m_backend->context();
}
void flushContext() override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
backend->flushContext();
}
}
IntSize logicalSize() const override { return IntSize(m_parameters.logicalSize); }
float resolutionScale() const override { return m_parameters.resolutionScale; }
ColorSpace colorSpace() const override { return m_parameters.colorSpace; }
PixelFormat pixelFormat() const override { return m_parameters.pixelFormat; }
const ImageBufferBackend::Parameters& parameters() const override { return m_parameters; }
IntSize backendSize() const override
{
if (auto* backend = ensureBackendCreated())
return backend->backendSize();
return { };
}
AffineTransform baseTransform() const override
{
if (BackendType::isOriginAtUpperLeftCorner)
return AffineTransform(1, 0, 0, -1, 0, logicalSize().height());
return { };
}
size_t memoryCost() const override
{
return m_backend ? m_backend->memoryCost() : 0;
}
size_t externalMemoryCost() const override
{
return m_backend ? m_backend->externalMemoryCost() : 0;
}
RefPtr<NativeImage> copyNativeImage(BackingStoreCopy copyBehavior = CopyBackingStore) const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushDrawingContext();
return backend->copyNativeImage(copyBehavior);
}
return nullptr;
}
RefPtr<Image> copyImage(BackingStoreCopy copyBehavior = CopyBackingStore, PreserveResolution preserveResolution = PreserveResolution::No) const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushDrawingContext();
return backend->copyImage(copyBehavior, preserveResolution);
}
return nullptr;
}
void draw(GraphicsContext& destContext, const FloatRect& destRect, const FloatRect& srcRect, const ImagePaintingOptions& options) override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
backend->draw(destContext, destRect, srcRect, options);
}
}
void drawPattern(GraphicsContext& destContext, const FloatRect& destRect, const FloatRect& srcRect, const AffineTransform& patternTransform, const FloatPoint& phase, const FloatSize& spacing, const ImagePaintingOptions& options) override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
backend->drawPattern(destContext, destRect, srcRect, patternTransform, phase, spacing, options);
}
}
RefPtr<NativeImage> sinkIntoNativeImage() override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
return backend->sinkIntoNativeImage();
}
return nullptr;
}
RefPtr<Image> sinkIntoImage(PreserveResolution preserveResolution = PreserveResolution::No) override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
return backend->sinkIntoImage(preserveResolution);
}
return nullptr;
}
void drawConsuming(GraphicsContext& destContext, const FloatRect& destRect, const FloatRect& srcRect, const ImagePaintingOptions& options) override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
backend->drawConsuming(destContext, destRect, srcRect, options);
}
}
void clipToMask(GraphicsContext& destContext, const FloatRect& destRect) override
{
if (auto* backend = ensureBackendCreated()) {
flushContext();
backend->clipToMask(destContext, destRect);
}
}
void convertToLuminanceMask() override
{
if (auto* backend = ensureBackendCreated()) {
flushContext();
backend->convertToLuminanceMask();
}
}
void transformColorSpace(ColorSpace srcColorSpace, ColorSpace destColorSpace) override
{
if (auto* backend = ensureBackendCreated()) {
flushDrawingContext();
backend->transformColorSpace(srcColorSpace, destColorSpace);
}
}
String toDataURL(const String& mimeType, Optional<double> quality, PreserveResolution preserveResolution) const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushContext();
return backend->toDataURL(mimeType, quality, preserveResolution);
}
return String();
}
Vector<uint8_t> toData(const String& mimeType, Optional<double> quality = WTF::nullopt) const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushContext();
return backend->toData(mimeType, quality);
}
return { };
}
Vector<uint8_t> toBGRAData() const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushContext();
return backend->toBGRAData();
}
return { };
}
RefPtr<ImageData> getImageData(AlphaPremultiplication outputFormat, const IntRect& srcRect) const override
{
if (auto* backend = ensureBackendCreated()) {
const_cast<ConcreteImageBuffer&>(*this).flushContext();
return backend->getImageData(outputFormat, srcRect);
}
return nullptr;
}
void putImageData(AlphaPremultiplication inputFormat, const ImageData& imageData, const IntRect& srcRect, const IntPoint& destPoint = { }, AlphaPremultiplication destFormat = AlphaPremultiplication::Premultiplied) override
{
if (auto* backend = ensureBackendCreated()) {
flushContext();
backend->putImageData(inputFormat, imageData, srcRect, destPoint, destFormat);
}
}
PlatformLayer* platformLayer() const override
{
if (auto* backend = ensureBackendCreated())
return backend->platformLayer();
return nullptr;
}
bool copyToPlatformTexture(GraphicsContextGL& context, GCGLenum target, PlatformGLObject destinationTexture, GCGLenum internalformat, bool premultiplyAlpha, bool flipY) const override
{
if (auto* backend = ensureBackendCreated())
return backend->copyToPlatformTexture(context, target, destinationTexture, internalformat, premultiplyAlpha, flipY);
return false;
}
bool isInUse() const override
{
if (auto* backend = ensureBackendCreated())
return backend->isInUse();
return false;
}
void releaseGraphicsContext() override
{
if (auto* backend = ensureBackendCreated())
return backend->releaseGraphicsContext();
}
VolatilityState setVolatile(bool isVolatile) override
{
if (auto* backend = ensureBackendCreated())
return backend->setVolatile(isVolatile);
return VolatilityState::Valid;
}
std::unique_ptr<ThreadSafeImageBufferFlusher> createFlusher() override
{
if (auto* backend = ensureBackendCreated())
return backend->createFlusher();
return nullptr;
}
void releaseBufferToPool() override
{
if (auto* backend = ensureBackendCreated())
backend->releaseBufferToPool();
}
ImageBufferBackend::Parameters m_parameters;
std::unique_ptr<BackendType> m_backend;
RenderingResourceIdentifier m_renderingResourceIdentifier;
};
}