#pragma once
#include "CanvasGradient.h"
#include "CanvasPattern.h"
#include "Color.h"
#include "ColorSerialization.h"
#include <wtf/Variant.h>
namespace WebCore {
class Document;
class GraphicsContext;
class CanvasBase;
class CanvasStyle {
public:
CanvasStyle();
CanvasStyle(Color);
CanvasStyle(const SRGBA<float>&);
CanvasStyle(const CMYKA<float>&);
CanvasStyle(CanvasGradient&);
CanvasStyle(CanvasPattern&);
static CanvasStyle createFromString(const String& color, CanvasBase&);
static CanvasStyle createFromStringWithOverrideAlpha(const String& color, float alpha, CanvasBase&);
bool isValid() const { return !WTF::holds_alternative<Invalid>(m_style); }
bool isCurrentColor() const { return WTF::holds_alternative<CurrentColor>(m_style); }
Optional<float> overrideAlpha() const { return WTF::get<CurrentColor>(m_style).overrideAlpha; }
String color() const;
RefPtr<CanvasGradient> canvasGradient() const;
RefPtr<CanvasPattern> canvasPattern() const;
void applyFillColor(GraphicsContext&) const;
void applyStrokeColor(GraphicsContext&) const;
bool isEquivalentColor(const CanvasStyle&) const;
bool isEquivalent(const SRGBA<float>&) const;
bool isEquivalent(const CMYKA<float>&) const;
private:
struct Invalid { };
struct CurrentColor {
Optional<float> overrideAlpha;
};
CanvasStyle(CurrentColor);
Variant<Invalid, Color, RefPtr<CanvasGradient>, RefPtr<CanvasPattern>, CurrentColor> m_style;
};
bool isCurrentColorString(const String& colorString);
Color currentColor(CanvasBase&);
Color parseColor(const String& colorString, CanvasBase&);
Color parseColorOrCurrentColor(const String& colorString, CanvasBase&);
inline CanvasStyle::CanvasStyle()
: m_style(Invalid { })
{
}
inline RefPtr<CanvasGradient> CanvasStyle::canvasGradient() const
{
if (!WTF::holds_alternative<RefPtr<CanvasGradient>>(m_style))
return nullptr;
return WTF::get<RefPtr<CanvasGradient>>(m_style);
}
inline RefPtr<CanvasPattern> CanvasStyle::canvasPattern() const
{
if (!WTF::holds_alternative<RefPtr<CanvasPattern>>(m_style))
return nullptr;
return WTF::get<RefPtr<CanvasPattern>>(m_style);
}
inline String CanvasStyle::color() const
{
return serializationForHTML(WTF::get<Color>(m_style));
}
}