CanvasPathMethods.cpp [plain text]
#include "config.h"
#include "CanvasPathMethods.h"
#include "ExceptionCode.h"
#include "FloatRect.h"
#include <wtf/MathExtras.h>
namespace WebCore {
void CanvasPathMethods::closePath()
{
if (m_path.isEmpty())
return;
FloatRect boundRect = m_path.fastBoundingRect();
if (boundRect.width() || boundRect.height())
m_path.closeSubpath();
}
void CanvasPathMethods::moveTo(float x, float y)
{
if (!std::isfinite(x) || !std::isfinite(y))
return;
if (!isTransformInvertible())
return;
m_path.moveTo(FloatPoint(x, y));
}
void CanvasPathMethods::lineTo(float x, float y)
{
if (!std::isfinite(x) || !std::isfinite(y))
return;
if (!isTransformInvertible())
return;
FloatPoint p1 = FloatPoint(x, y);
if (!m_path.hasCurrentPoint())
m_path.moveTo(p1);
else if (p1 != m_path.currentPoint())
m_path.addLineTo(p1);
}
void CanvasPathMethods::quadraticCurveTo(float cpx, float cpy, float x, float y)
{
if (!std::isfinite(cpx) || !std::isfinite(cpy) || !std::isfinite(x) || !std::isfinite(y))
return;
if (!isTransformInvertible())
return;
if (!m_path.hasCurrentPoint())
m_path.moveTo(FloatPoint(cpx, cpy));
FloatPoint p1 = FloatPoint(x, y);
FloatPoint cp = FloatPoint(cpx, cpy);
if (p1 != m_path.currentPoint() || p1 != cp)
m_path.addQuadCurveTo(cp, p1);
}
void CanvasPathMethods::bezierCurveTo(float cp1x, float cp1y, float cp2x, float cp2y, float x, float y)
{
if (!std::isfinite(cp1x) || !std::isfinite(cp1y) || !std::isfinite(cp2x) || !std::isfinite(cp2y) || !std::isfinite(x) || !std::isfinite(y))
return;
if (!isTransformInvertible())
return;
if (!m_path.hasCurrentPoint())
m_path.moveTo(FloatPoint(cp1x, cp1y));
FloatPoint p1 = FloatPoint(x, y);
FloatPoint cp1 = FloatPoint(cp1x, cp1y);
FloatPoint cp2 = FloatPoint(cp2x, cp2y);
if (p1 != m_path.currentPoint() || p1 != cp1 || p1 != cp2)
m_path.addBezierCurveTo(cp1, cp2, p1);
}
void CanvasPathMethods::arcTo(float x1, float y1, float x2, float y2, float r, ExceptionCode& ec)
{
ec = 0;
if (!std::isfinite(x1) || !std::isfinite(y1) || !std::isfinite(x2) || !std::isfinite(y2) || !std::isfinite(r))
return;
if (r < 0) {
ec = INDEX_SIZE_ERR;
return;
}
if (!isTransformInvertible())
return;
FloatPoint p1 = FloatPoint(x1, y1);
FloatPoint p2 = FloatPoint(x2, y2);
if (!m_path.hasCurrentPoint())
m_path.moveTo(p1);
else if (p1 == m_path.currentPoint() || p1 == p2 || !r)
lineTo(x1, y1);
else
m_path.addArcTo(p1, p2, r);
}
void CanvasPathMethods::arc(float x, float y, float r, float sa, float ea, bool anticlockwise, ExceptionCode& ec)
{
ec = 0;
if (!std::isfinite(x) || !std::isfinite(y) || !std::isfinite(r) || !std::isfinite(sa) || !std::isfinite(ea))
return;
if (r < 0) {
ec = INDEX_SIZE_ERR;
return;
}
if (!r || sa == ea) {
lineTo(x + r * cosf(sa), y + r * sinf(sa));
return;
}
if (!isTransformInvertible())
return;
if (anticlockwise && sa - ea >= 2 * piFloat) {
m_path.addArc(FloatPoint(x, y), r, sa, sa - 2 * piFloat, anticlockwise);
return;
}
if (!anticlockwise && ea - sa >= 2 * piFloat) {
m_path.addArc(FloatPoint(x, y), r, sa, sa + 2 * piFloat, anticlockwise);
return;
}
m_path.addArc(FloatPoint(x, y), r, sa, ea, anticlockwise);
}
void CanvasPathMethods::rect(float x, float y, float width, float height)
{
if (!isTransformInvertible())
return;
if (!std::isfinite(x) || !std::isfinite(y) || !std::isfinite(width) || !std::isfinite(height))
return;
if (!width && !height) {
m_path.moveTo(FloatPoint(x, y));
return;
}
m_path.addRect(FloatRect(x, y, width, height));
}
}