CustomPaintCanvas.h [plain text]
#pragma once
#if ENABLE(CSS_PAINTING_API)
#include "AffineTransform.h"
#include "CanvasBase.h"
#include "ContextDestructionObserver.h"
#include "EventTarget.h"
#include "ExceptionOr.h"
#include "ImageBuffer.h"
#include "IntSize.h"
#include "ScriptWrappable.h"
#include <wtf/Forward.h>
#include <wtf/RefCounted.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class CanvasRenderingContext;
class ImageBitmap;
class PaintRenderingContext2D;
class CustomPaintCanvas final : public RefCounted<CustomPaintCanvas>, public CanvasBase, private ContextDestructionObserver {
WTF_MAKE_FAST_ALLOCATED;
public:
static Ref<CustomPaintCanvas> create(ScriptExecutionContext&, unsigned width, unsigned height);
virtual ~CustomPaintCanvas();
bool isCustomPaintCanvas() const final { return true; }
ExceptionOr<RefPtr<PaintRenderingContext2D>> getContext();
CanvasRenderingContext* renderingContext() const final { return m_context.get(); }
GraphicsContext* drawingContext() const final;
GraphicsContext* existingDrawingContext() const final;
void didDraw(const FloatRect&) final { }
AffineTransform baseTransform() const final { ASSERT(m_destinationGraphicsContext && m_copiedBuffer); return m_copiedBuffer->baseTransform(); }
Image* copiedImage() const final;
void replayDisplayList(GraphicsContext*) const;
using RefCounted::ref;
using RefCounted::deref;
private:
CustomPaintCanvas(ScriptExecutionContext&, unsigned width, unsigned height);
void refCanvasBase() final { ref(); }
void derefCanvasBase() final { deref(); }
ScriptExecutionContext* canvasBaseScriptExecutionContext() const final { return ContextDestructionObserver::scriptExecutionContext(); }
std::unique_ptr<CanvasRenderingContext> m_context;
mutable GraphicsContext* m_destinationGraphicsContext = nullptr;
mutable std::unique_ptr<ImageBuffer> m_copiedBuffer;
mutable RefPtr<Image> m_copiedImage;
};
}
SPECIALIZE_TYPE_TRAITS_CANVAS(WebCore::CustomPaintCanvas, isCustomPaintCanvas())
#endif