#include "config.h"
#include "Gradient.h"
#include "GraphicsContextCG.h"
#include <CoreGraphics/CoreGraphics.h>
#include <wtf/RetainPtr.h>
namespace WebCore {
void Gradient::platformDestroy()
{
CGGradientRelease(m_gradient);
m_gradient = 0;
}
CGGradientRef Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
sortStopsIfNecessary();
const int cReservedStops = 3;
Vector<CGFloat, 4 * cReservedStops> colorComponents;
colorComponents.reserveInitialCapacity(m_stops.size() * 4);
Vector<CGFloat, cReservedStops> locations;
locations.reserveInitialCapacity(m_stops.size());
for (size_t i = 0; i < m_stops.size(); ++i) {
colorComponents.uncheckedAppend(m_stops[i].red);
colorComponents.uncheckedAppend(m_stops[i].green);
colorComponents.uncheckedAppend(m_stops[i].blue);
colorComponents.uncheckedAppend(m_stops[i].alpha);
locations.uncheckedAppend(m_stops[i].stop);
}
m_gradient = CGGradientCreateWithColorComponents(sRGBColorSpaceRef(), colorComponents.data(), locations.data(), m_stops.size());
return m_gradient;
}
void Gradient::fill(GraphicsContext* context, const FloatRect& rect)
{
context->clip(rect);
paint(context);
}
void Gradient::paint(GraphicsContext* context)
{
CGContextRef ctx = context->platformContext();
paint(ctx);
}
void Gradient::paint(CGContextRef context)
{
CGGradientDrawingOptions extendOptions = kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation;
if (!m_radial) {
CGContextDrawLinearGradient(context, platformGradient(), m_p0, m_p1, extendOptions);
return;
}
bool needScaling = aspectRatio() != 1;
if (needScaling) {
CGContextSaveGState(context);
ASSERT(m_p0 == m_p1);
CGContextTranslateCTM(context, m_p0.x(), m_p0.y());
CGContextScaleCTM(context, 1, 1 / aspectRatio());
CGContextTranslateCTM(context, -m_p0.x(), -m_p0.y());
}
CGContextDrawRadialGradient(context, platformGradient(), m_p0, m_r0, m_p1, m_r1, extendOptions);
if (needScaling)
CGContextRestoreGState(context);
}
}