#pragma once
#include "AffineTransform.h"
#include "Color.h"
#include "FloatPoint.h"
#include "GraphicsTypes.h"
#include <wtf/Variant.h>
#include <wtf/Vector.h>
#if USE(CG)
#include <wtf/RetainPtr.h>
#endif
#if USE(DIRECT2D)
#include "COMPtr.h"
#endif
#if USE(CG)
typedef struct CGContext* CGContextRef;
typedef struct CGGradient* CGGradientRef;
#endif
#if USE(DIRECT2D)
interface ID2D1Brush;
interface ID2D1RenderTarget;
#endif
#if USE(CAIRO)
typedef struct _cairo_pattern cairo_pattern_t;
#endif
namespace WebCore {
class FloatRect;
class GraphicsContext;
class Gradient : public RefCounted<Gradient> {
public:
struct ColorStop {
float offset { 0 };
Color color;
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static Optional<ColorStop> decode(Decoder&);
};
using ColorStopVector = Vector<ColorStop, 2>;
struct LinearData {
FloatPoint point0;
FloatPoint point1;
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static Optional<LinearData> decode(Decoder&);
};
struct RadialData {
FloatPoint point0;
FloatPoint point1;
float startRadius;
float endRadius;
float aspectRatio;
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static Optional<RadialData> decode(Decoder&);
};
struct ConicData {
FloatPoint point0;
float angleRadians;
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static Optional<ConicData> decode(Decoder&);
};
using Data = Variant<LinearData, RadialData, ConicData>;
WEBCORE_EXPORT static Ref<Gradient> create(Data&&);
WEBCORE_EXPORT ~Gradient();
bool isZeroSize() const;
const Data& data() const { return m_data; }
WEBCORE_EXPORT void addColorStop(ColorStop&&);
WEBCORE_EXPORT void setSortedColorStops(ColorStopVector&&);
const ColorStopVector& stops() const { return m_stops; }
WEBCORE_EXPORT void setSpreadMethod(GradientSpreadMethod);
GradientSpreadMethod spreadMethod() const { return m_spreadMethod; }
WEBCORE_EXPORT void setGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation);
const AffineTransform& gradientSpaceTransform() const { return m_gradientSpaceTransformation; }
void fill(GraphicsContext&, const FloatRect&);
void adjustParametersForTiledDrawing(FloatSize&, FloatRect&, const FloatSize& spacing);
unsigned hash() const;
#if USE(CAIRO)
RefPtr<cairo_pattern_t> createPattern(float globalAlpha);
#endif
#if USE(CG)
void paint(GraphicsContext&);
void paint(CGContextRef);
#endif
#if USE(DIRECT2D)
ID2D1Brush* createBrush(ID2D1RenderTarget*);
#endif
template<typename Encoder> void encode(Encoder&) const;
template<typename Decoder> static Optional<Ref<Gradient>> decode(Decoder&);
private:
explicit Gradient(Data&&);
void sortStops() const;
void stopsChanged();
#if USE(CG)
void createCGGradient();
#endif
Data m_data;
mutable ColorStopVector m_stops;
mutable bool m_stopsSorted { false };
GradientSpreadMethod m_spreadMethod { GradientSpreadMethod::Pad };
mutable unsigned m_cachedHash { 0 };
AffineTransform m_gradientSpaceTransformation;
#if USE(CG)
RetainPtr<CGGradientRef> m_gradient;
#endif
#if USE(DIRECT2D)
COMPtr<ID2D1Brush> m_brush;
#endif
};
template<typename Encoder> void Gradient::ColorStop::encode(Encoder& encoder) const
{
encoder << offset;
encoder << color;
}
template<typename Decoder> Optional<Gradient::ColorStop> Gradient::ColorStop::decode(Decoder& decoder)
{
Optional<float> offset;
decoder >> offset;
if (!offset)
return WTF::nullopt;
Optional<Color> color;
decoder >> color;
if (!color)
return WTF::nullopt;
return {{ *offset, *color }};
}
template<typename Encoder> void Gradient::LinearData::encode(Encoder& encoder) const
{
encoder << point0;
encoder << point1;
}
template<typename Decoder> Optional<Gradient::LinearData> Gradient::LinearData::decode(Decoder& decoder)
{
Optional<FloatPoint> point0;
decoder >> point0;
if (!point0)
return WTF::nullopt;
Optional<FloatPoint> point1;
decoder >> point1;
if (!point1)
return WTF::nullopt;
return {{ *point0, *point1 }};
}
template<typename Encoder> void Gradient::RadialData::encode(Encoder& encoder) const
{
encoder << point0;
encoder << point1;
encoder << startRadius;
encoder << endRadius;
encoder << aspectRatio;
}
template<typename Decoder> Optional<Gradient::RadialData> Gradient::RadialData::decode(Decoder& decoder)
{
Optional<FloatPoint> point0;
decoder >> point0;
if (!point0)
return WTF::nullopt;
Optional<FloatPoint> point1;
decoder >> point1;
if (!point1)
return WTF::nullopt;
Optional<float> startRadius;
decoder >> startRadius;
if (!startRadius)
return WTF::nullopt;
Optional<float> endRadius;
decoder >> endRadius;
if (!endRadius)
return WTF::nullopt;
Optional<float> aspectRatio;
decoder >> aspectRatio;
if (!aspectRatio)
return WTF::nullopt;
return {{ *point0, *point1, *startRadius, *endRadius, *aspectRatio }};
}
template<typename Encoder> void Gradient::ConicData::encode(Encoder& encoder) const
{
encoder << point0;
encoder << angleRadians;
}
template<typename Decoder> Optional<Gradient::ConicData> Gradient::ConicData::decode(Decoder& decoder)
{
Optional<FloatPoint> point0;
decoder >> point0;
if (!point0)
return WTF::nullopt;
Optional<float> angleRadians;
decoder >> angleRadians;
if (!angleRadians)
return WTF::nullopt;
return {{ *point0, *angleRadians }};
}
template<typename Encoder> void Gradient::encode(Encoder& encoder) const
{
encoder << m_data;
encoder << m_stops;
encoder << m_stopsSorted;
encoder << m_spreadMethod;
encoder << m_gradientSpaceTransformation;
}
template<typename Decoder> Optional<Ref<Gradient>> Gradient::decode(Decoder& decoder)
{
Optional<Data> data;
decoder >> data;
if (!data)
return WTF::nullopt;
auto gradient = Gradient::create(WTFMove(*data));
Optional<ColorStopVector> stops;
decoder >> stops;
if (!stops)
return WTF::nullopt;
Optional<bool> stopsSorted;
decoder >> stopsSorted;
if (!stopsSorted.hasValue())
return WTF::nullopt;
if (*stopsSorted)
gradient->setSortedColorStops(WTFMove(*stops));
else {
for (auto& stop : *stops)
gradient->addColorStop(WTFMove(stop));
}
GradientSpreadMethod spreadMethod;
if (!decoder.decode(spreadMethod))
return WTF::nullopt;
gradient->setSpreadMethod(spreadMethod);
Optional<AffineTransform> gradientSpaceTransformation;
decoder >> gradientSpaceTransformation;
if (!gradientSpaceTransformation)
return WTF::nullopt;
gradient->setGradientSpaceTransform(WTFMove(*gradientSpaceTransformation));
return gradient;
}
}