#pragma once
#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&)>;
using DrawImageCallback = WTF::Function<void(ImageBuffer&, const FloatRect&, const FloatRect&)>;
using FillRectCallback = WTF::Function<void(const FloatRect&, const Color&)>;
using FillRectWithHoleCallback = WTF::Function<void(const FloatRect&, const FloatRect&, const Color&)>;
using DrawShadowCallback = WTF::Function<void(GraphicsContext&)>;
void drawRectShadow(const AffineTransform&, const IntRect& clipBounds, const FloatRoundedRect& shadowedRect, const DrawBufferCallback&, const DrawImageCallback&, const FillRectCallback&);
void drawInsetShadow(const AffineTransform&, const IntRect& clipBounds, const FloatRect& fullRect, const FloatRoundedRect& holeRect, const DrawBufferCallback&, const DrawImageCallback&, const FillRectWithHoleCallback&);
void drawShadowLayer(const AffineTransform&, const IntRect& clipBounds, const FloatRect& layerArea, 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&, ImageBuffer&, const FloatPoint&, const FloatSize&);
void adjustBlurRadius(const AffineTransform&);
enum ShadowDirection {
OuterShadow,
InnerShadow
};
struct LayerImageProperties {
FloatSize shadowedResultSize; FloatPoint layerOrigin; FloatSize layerSize; FloatSize layerContextTranslation; };
Optional<ShadowBlur::LayerImageProperties> calculateLayerBoundingRect(const AffineTransform&, const FloatRect& layerArea, const IntRect& clipRect);
IntSize templateSize(const IntSize& blurredEdgeSize, const FloatRoundedRect::Radii&) const;
void blurShadowBuffer(ImageBuffer& layerImage, const IntSize& templateSize);
void blurAndColorShadowBuffer(ImageBuffer& layerImage, const IntSize& templateSize);
void drawInsetShadowWithoutTiling(const AffineTransform&, const FloatRect& fullRect, const FloatRoundedRect& holeRect, const LayerImageProperties&, const DrawBufferCallback&);
void drawInsetShadowWithTiling(const AffineTransform&, const FloatRect& fullRect, const FloatRoundedRect& holeRect, const IntSize& shadowTemplateSize, const IntSize& blurredEdgeSize, const DrawImageCallback&, const FillRectWithHoleCallback&);
void drawRectShadowWithoutTiling(const AffineTransform&, const FloatRoundedRect& shadowedRect, const LayerImageProperties&, const DrawBufferCallback&);
void drawRectShadowWithTiling(const AffineTransform&, const FloatRoundedRect& shadowedRect, const IntSize& shadowTemplateSize, const IntSize& blurredEdgeSize, const DrawImageCallback&, const FillRectCallback&, const LayerImageProperties&);
void drawLayerPiecesAndFillCenter(ImageBuffer& layerImage, const FloatRect& shadowBounds, const FloatRoundedRect::Radii&, const IntSize& roundedRadius, const IntSize& templateSize, const DrawImageCallback&, const FillRectCallback&);
void drawLayerPieces(ImageBuffer& layerImage, const FloatRect& shadowBounds, const FloatRoundedRect::Radii&, const IntSize& roundedRadius, const IntSize& templateSize, const DrawImageCallback&);
IntSize blurredEdgeSize() const;
ShadowType m_type { NoShadow };
Color m_color;
FloatSize m_blurRadius;
FloatSize m_offset;
bool m_shadowsIgnoreTransforms { false };
};
}