AffineTransform.cpp [plain text]
#include "config.h"
#include "AffineTransform.h"
#include "FloatRect.h"
#include "IntRect.h"
#include <wtf/MathExtras.h>
namespace WebCore {
bool AffineTransform::isInvertible() const
{
return det() != 0.0;
}
AffineTransform& AffineTransform::multiply(const AffineTransform& other)
{
return (*this) *= other;
}
AffineTransform& AffineTransform::scale(double s)
{
return scale(s, s);
}
AffineTransform& AffineTransform::scaleNonUniform(double sx, double sy)
{
return scale(sx, sy);
}
AffineTransform& AffineTransform::rotateFromVector(double x, double y)
{
return rotate(rad2deg(atan2(y, x)));
}
AffineTransform& AffineTransform::flipX()
{
return scale(-1.0f, 1.0f);
}
AffineTransform& AffineTransform::flipY()
{
return scale(1.0f, -1.0f);
}
AffineTransform& AffineTransform::skew(double angleX, double angleY)
{
return shear(tan(deg2rad(angleX)), tan(deg2rad(angleY)));
}
AffineTransform& AffineTransform::skewX(double angle)
{
return shear(tan(deg2rad(angle)), 0.0f);
}
AffineTransform& AffineTransform::skewY(double angle)
{
return shear(0.0f, tan(deg2rad(angle)));
}
IntPoint AffineTransform::mapPoint(const IntPoint& point) const
{
double x2, y2;
map(point.x(), point.y(), &x2, &y2);
return IntPoint(lround(x2), lround(y2));
}
FloatPoint AffineTransform::mapPoint(const FloatPoint& point) const
{
double x2, y2;
map(point.x(), point.y(), &x2, &y2);
return FloatPoint(static_cast<float>(x2), static_cast<float>(y2));
}
}