#ifndef ShadowBlur_h
#define ShadowBlur_h
#include "Color.h"
#include "FloatRect.h"
#include "FloatRoundedRect.h"
#include <wtf/Function.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
class AffineTransform;
class GraphicsContext;
struct GraphicsContextState;
class ImageBuffer;
class ShadowBlur {
WTF_MAKE_NONCOPYABLE(ShadowBlur);
public:
enum ShadowType {
NoShadow,
SolidShadow,
BlurShadow
};
ShadowBlur();
ShadowBlur(const FloatSize& radius, const FloatSize& offset, const Color&, bool shadowsIgnoreTransforms = false);
ShadowBlur(const GraphicsContextState&);
void setShadowValues(const FloatSize&, const FloatSize& , const Color&, bool ignoreTransforms = false);
void setShadowsIgnoreTransforms(bool ignoreTransforms) { m_shadowsIgnoreTransforms = ignoreTransforms; }
bool shadowsIgnoreTransforms() const { return m_shadowsIgnoreTransforms; }
void drawRectShadow(GraphicsContext&, const FloatRoundedRect&);
void drawInsetShadow(GraphicsContext&, const FloatRect&, const FloatRoundedRect& holeRect);
using DrawBufferCallback = WTF::Function<void(ImageBuffer&, const FloatPoint&, const FloatSize&, const FloatRect&)>;
void drawRectShadow(const AffineTransform&, const IntRect&, const FloatRoundedRect&, const DrawBufferCallback&);
void drawInsetShadow(const AffineTransform&, const IntRect&, const FloatRect&, const FloatRoundedRect&, const DrawBufferCallback&);
using DrawShadowCallback = WTF::Function<void(GraphicsContext&)>;
void drawShadowLayer(const AffineTransform&, const IntRect&, const FloatRect&, const DrawShadowCallback&, const DrawBufferCallback&);
void blurLayerImage(unsigned char*, const IntSize&, int stride);
void clear();
ShadowType type() const { return m_type; }
private:
void updateShadowBlurValues();
void drawShadowBuffer(GraphicsContext&);
void adjustBlurRadius(const AffineTransform&);
enum ShadowDirection {
OuterShadow,
InnerShadow
};
IntSize calculateLayerBoundingRect(const AffineTransform&, const FloatRect& layerArea, const IntRect& clipRect);
IntSize templateSize(const IntSize& blurredEdgeSize, const FloatRoundedRect::Radii&) const;
void drawRectShadowWithoutTiling(GraphicsContext&, const FloatRoundedRect&, const IntSize& layerSize);
void drawRectShadowWithTiling(GraphicsContext&, const FloatRoundedRect&, const IntSize& shadowTemplateSize, const IntSize& blurredEdgeSize);
void drawInsetShadowWithoutTiling(GraphicsContext&, const FloatRect&, const FloatRoundedRect& holeRect, const IntSize& layerSize);
void drawInsetShadowWithTiling(GraphicsContext&, const FloatRect&, const FloatRoundedRect& holeRect, const IntSize& shadowTemplateSize, const IntSize& blurredEdgeSize);
void drawLayerPieces(GraphicsContext&, const FloatRect& shadowBounds, const FloatRoundedRect::Radii&, const IntSize& roundedRadius, const IntSize& templateSize, ShadowDirection);
void blurShadowBuffer(const IntSize& templateSize);
void blurAndColorShadowBuffer(const IntSize& templateSize);
IntSize blurredEdgeSize() const;
ShadowType m_type { NoShadow };
Color m_color;
FloatSize m_blurRadius;
FloatSize m_offset;
ImageBuffer* m_layerImage { nullptr };
FloatRect m_sourceRect; FloatPoint m_layerOrigin; FloatSize m_layerSize; FloatSize m_layerContextTranslation;
bool m_shadowsIgnoreTransforms { false };
};
}
#endif // ShadowBlur_h