void CanvasPathMethods::arc(float x, float y, float r, float sa, float ea, bool anticlockwise, ExceptionCode& ec)
{
ec = 0;
if (!isfinite(x) || !isfinite(y) || !isfinite(r) || !isfinite(sa) || !isfinite(ea))
return;
if (r < 0) {
ec = INDEX_SIZE_ERR;
return;
}
if (!r || sa == ea) {
// The arc is empty but we still need to draw the connecting line.
lineTo(x + r * cosf(sa), y + r * sinf(sa));
return;
}
if (!isTransformInvertible())
return;
// If 'sa' and 'ea' differ by more than 2Pi, just add a circle starting/ending at 'sa'.
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::ellipse(float x, float y, float radiusX, float radiusY, float rotation, float startAngle, float endAngle, bool anticlockwise, ExceptionState& exceptionState)
{
if (!std::isfinite(x) || !std::isfinite(y) || !std::isfinite(radiusX) || !std::isfinite(radiusY) || !std::isfinite(rotation) || !std::isfinite(startAngle) || !std::isfinite(endAngle))
return;
if (radiusX < 0) {
exceptionState.throwDOMException(IndexSizeError, "The major-axis radius provided (" + String::number(radiusX) + ") is negative.");
return;
}
if (radiusY < 0) {
exceptionState.throwDOMException(IndexSizeError, "The minor-axis radius provided (" + String::number(radiusY) + ") is negative.");
return;
}
if (!isTransformInvertible())
return;
canonicalizeAngle(&startAngle, &endAngle);
float adjustedEndAngle = adjustEndAngle(startAngle, endAngle, anticlockwise);
if (!radiusX || !radiusY || startAngle == adjustedEndAngle) {
// The ellipse is empty but we still need to draw the connecting line to start point.
degenerateEllipse(this, x, y, radiusX, radiusY, rotation, startAngle, adjustedEndAngle, anticlockwise);
return;
}
m_path.addEllipse(FloatPoint(x, y), radiusX, radiusY, rotation, startAngle, adjustedEndAngle, anticlockwise);
}
void CanvasPathMethods::moveTo(float x, float y)
{
if (!isfinite(x) || !isfinite(y))
return;
if (!isTransformInvertible())
return;
m_path.moveTo(FloatPoint(x, y));
}
void CanvasPathMethods::lineTo(float x, float y)
{
if (!isfinite(x) || !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 (!isfinite(cpx) || !isfinite(cpy) || !isfinite(x) || !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 (!isfinite(cp1x) || !isfinite(cp1y) || !isfinite(cp2x) || !isfinite(cp2y) || !isfinite(x) || !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::rect(float x, float y, float width, float height)
{
if (!isTransformInvertible())
return;
if (!isfinite(x) || !isfinite(y) || !isfinite(width) || !isfinite(height))
return;
if (!width && !height) {
m_path.moveTo(FloatPoint(x, y));
return;
}
m_path.addRect(FloatRect(x, y, width, height));
}
void CanvasPathMethods::arc(float x, float y, float radius, float startAngle, float endAngle, bool anticlockwise, ExceptionState& exceptionState)
{
if (!std::isfinite(x) || !std::isfinite(y) || !std::isfinite(radius) || !std::isfinite(startAngle) || !std::isfinite(endAngle))
return;
if (radius < 0) {
exceptionState.throwDOMException(IndexSizeError, "The radius provided (" + String::number(radius) + ") is negative.");
return;
}
if (!isTransformInvertible())
return;
if (!radius || startAngle == endAngle) {
// The arc is empty but we still need to draw the connecting line.
lineTo(x + radius * cosf(startAngle), y + radius * sinf(startAngle));
return;
}
canonicalizeAngle(&startAngle, &endAngle);
float adjustedEndAngle = adjustEndAngle(startAngle, endAngle, anticlockwise);
m_path.addArc(FloatPoint(x, y), radius, startAngle, adjustedEndAngle, anticlockwise);
}
void CanvasPathMethods::arcTo(float x1, float y1, float x2, float y2, float r, ExceptionState& exceptionState)
{
if (!std::isfinite(x1) || !std::isfinite(y1) || !std::isfinite(x2) || !std::isfinite(y2) || !std::isfinite(r))
return;
if (r < 0) {
exceptionState.throwDOMException(IndexSizeError, "The radius provided (" + String::number(r) + ") is negative.");
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::arcTo(float x1, float y1, float x2, float y2, float r, ExceptionCode& ec)
{
ec = 0;
if (!isfinite(x1) || !isfinite(y1) || !isfinite(x2) || !isfinite(y2) || !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);
}
