#pragma once
#include "CanvasGradient.h"
#include "CanvasPattern.h"
#include "Color.h"
#include <wtf/Variant.h>
namespace WebCore {
class Document;
class GraphicsContext;
class HTMLCanvasElement;
class CanvasStyle {
public:
CanvasStyle();
CanvasStyle(Color);
CanvasStyle(float grayLevel, float alpha);
CanvasStyle(float r, float g, float b, float alpha);
CanvasStyle(float c, float m, float y, float k, float alpha);
CanvasStyle(CanvasGradient&);
CanvasStyle(CanvasPattern&);
static CanvasStyle createFromString(const String& color);
static CanvasStyle createFromStringWithOverrideAlpha(const String& color, float alpha);
bool isValid() const { return !WTF::holds_alternative<Invalid>(m_style); }
bool isCurrentColor() const { return WTF::holds_alternative<CurrentColor>(m_style); }
bool hasOverrideAlpha() const { return isCurrentColor() && WTF::get<CurrentColor>(m_style).overrideAlpha; }
float overrideAlpha() const { return WTF::get<CurrentColor>(m_style).overrideAlpha.value(); }
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 isEquivalentRGBA(float red, float green, float blue, float alpha) const;
bool isEquivalentCMYKA(float cyan, float magenta, float yellow, float black, float alpha) const;
private:
struct Invalid { };
struct CMYKAColor {
Color color;
float c { 0 };
float m { 0 };
float y { 0 };
float k { 0 };
float a { 0 };
};
struct CurrentColor {
std::optional<float> overrideAlpha;
};
CanvasStyle(CurrentColor);
Variant<Invalid, Color, CMYKAColor, RefPtr<CanvasGradient>, RefPtr<CanvasPattern>, CurrentColor> m_style;
};
Color currentColor(HTMLCanvasElement*);
Color parseColorOrCurrentColor(const String& colorString, HTMLCanvasElement*);
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
{
auto& color = WTF::holds_alternative<Color>(m_style) ? WTF::get<Color>(m_style) : WTF::get<CMYKAColor>(m_style).color;
return color.serialized();
}
}