#ifndef Gradient_h
#define Gradient_h
#include "AffineTransform.h"
#include "FloatPoint.h"
#include "Generator.h"
#include "GraphicsTypes.h"
#include <wtf/PassRefPtr.h>
#include <wtf/Vector.h>
#if USE(CG)
typedef struct CGContext* CGContextRef;
#define USE_CG_SHADING defined(BUILDING_ON_LEOPARD)
#if USE_CG_SHADING
typedef struct CGShading* CGShadingRef;
typedef CGShadingRef PlatformGradient;
#else
typedef struct CGGradient* CGGradientRef;
typedef CGGradientRef PlatformGradient;
#endif
#elif PLATFORM(QT)
QT_BEGIN_NAMESPACE
class QGradient;
QT_END_NAMESPACE
typedef QGradient* PlatformGradient;
#elif USE(CAIRO)
typedef struct _cairo_pattern cairo_pattern_t;
typedef cairo_pattern_t* PlatformGradient;
#elif USE(SKIA)
class SkShader;
typedef class SkShader* PlatformGradient;
typedef class SkShader* PlatformPattern;
#elif PLATFORM(HAIKU)
class BGradient;
typedef BGradient* PlatformGradient;
#else
typedef void* PlatformGradient;
#endif
namespace WebCore {
class Color;
class Gradient : public Generator {
public:
static PassRefPtr<Gradient> create(const FloatPoint& p0, const FloatPoint& p1)
{
return adoptRef(new Gradient(p0, p1));
}
static PassRefPtr<Gradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio = 1)
{
return adoptRef(new Gradient(p0, r0, p1, r1, aspectRatio));
}
virtual ~Gradient();
struct ColorStop;
void addColorStop(const ColorStop&);
void addColorStop(float, const Color&);
void getColor(float value, float* r, float* g, float* b, float* a) const;
bool hasAlpha() const;
bool isRadial() const { return m_radial; }
bool isZeroSize() const { return m_p0.x() == m_p1.x() && m_p0.y() == m_p1.y() && (!m_radial || m_r0 == m_r1); }
const FloatPoint& p0() const { return m_p0; }
const FloatPoint& p1() const { return m_p1; }
void setP0(const FloatPoint& p) { m_p0 = p; }
void setP1(const FloatPoint& p) { m_p1 = p; }
float startRadius() const { return m_r0; }
float endRadius() const { return m_r1; }
void setStartRadius(float r) { m_r0 = r; }
void setEndRadius(float r) { m_r1 = r; }
float aspectRatio() const { return m_aspectRatio; }
#if OS(WINCE) && !PLATFORM(QT)
const Vector<ColorStop, 2>& getStops() const;
#else
PlatformGradient platformGradient();
#endif
struct ColorStop {
float stop;
float red;
float green;
float blue;
float alpha;
ColorStop() : stop(0), red(0), green(0), blue(0), alpha(0) { }
ColorStop(float s, float r, float g, float b, float a) : stop(s), red(r), green(g), blue(b), alpha(a) { }
};
void setStopsSorted(bool s) { m_stopsSorted = s; }
void setSpreadMethod(GradientSpreadMethod);
GradientSpreadMethod spreadMethod() { return m_spreadMethod; }
void setGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation);
AffineTransform gradientSpaceTransform() { return m_gradientSpaceTransformation; }
virtual void fill(GraphicsContext*, const FloatRect&);
virtual void adjustParametersForTiledDrawing(IntSize& size, FloatRect& srcRect);
void setPlatformGradientSpaceTransform(const AffineTransform& gradientSpaceTransformation);
#if USE(CG)
void paint(CGContextRef);
void paint(GraphicsContext*);
#endif
private:
Gradient(const FloatPoint& p0, const FloatPoint& p1);
Gradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1, float aspectRatio);
void platformInit() { m_gradient = 0; }
void platformDestroy();
int findStop(float value) const;
void sortStopsIfNecessary();
bool m_radial;
FloatPoint m_p0;
FloatPoint m_p1;
float m_r0;
float m_r1;
float m_aspectRatio; mutable Vector<ColorStop, 2> m_stops;
mutable bool m_stopsSorted;
mutable int m_lastStop;
GradientSpreadMethod m_spreadMethod;
AffineTransform m_gradientSpaceTransformation;
PlatformGradient m_gradient;
};
}
#endif