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#ifndef OpaqueRegionSkia_h
#define OpaqueRegionSkia_h
#include "platform/PlatformExport.h"
#include "platform/geometry/IntRect.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkPaint.h"
#include "SkPoint.h"
#include "SkRect.h"
namespace WebCore {
class GraphicsContext;
// This class is an encapsulation of functionality for GraphicsContext, and its methods are mirrored
// there for the outside world. It tracks paints and computes what area will be opaque.
class PLATFORM_EXPORT OpaqueRegionSkia FINAL {
public:
OpaqueRegionSkia();
// The resulting opaque region as a single rect.
IntRect asRect() const;
void pushCanvasLayer(const SkPaint*);
void popCanvasLayer(const GraphicsContext*);
void setImageMask(const SkRect& imageOpaqueRect);
enum DrawType {
FillOnly,
FillOrStroke
};
void didDrawRect(const GraphicsContext*, const SkRect&, const SkPaint&, const SkBitmap* sourceBitmap);
void didDrawPath(const GraphicsContext*, const SkPath&, const SkPaint&);
void didDrawPoints(const GraphicsContext*, SkCanvas::PointMode, int numPoints, const SkPoint[], const SkPaint&);
void didDrawBounded(const GraphicsContext*, const SkRect&, const SkPaint&);
void didDrawUnbounded(const GraphicsContext*, const SkPaint&, DrawType);
struct CanvasLayerState {
CanvasLayerState()
: hasImageMask(false)
, opaqueRect(SkRect::MakeEmpty())
{ }
SkPaint paint;
// An image mask is being applied to the layer.
bool hasImageMask;
// The opaque area in the image mask.
SkRect imageOpaqueRect;
SkRect opaqueRect;
};
private:
void didDraw(const GraphicsContext*, const SkRect&, const SkPaint&, const SkBitmap* sourceBitmap, bool fillsBounds, DrawType);
void applyOpaqueRegionFromLayer(const GraphicsContext*, const SkRect& layerOpaqueRect, const SkPaint&);
void markRectAsOpaque(const SkRect&);
void markRectAsNonOpaque(const SkRect&);
void markAllAsNonOpaque();
SkRect& currentTrackingOpaqueRect();
SkRect m_opaqueRect;
Vector<CanvasLayerState, 3> m_canvasLayerStack;
};
}
#endif // OpaqueRegionSkia_h