void Path::addBeziersForRoundedRect(const FloatRect& rect, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius)
{
moveTo(FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
addLineTo(FloatPoint(rect.maxX() - topRightRadius.width(), rect.y()));
if (topRightRadius.width() > 0 || topRightRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.maxX() - topRightRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height()));
addLineTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height()));
if (bottomRightRadius.width() > 0 || bottomRightRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX() - bottomRightRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.maxX() - bottomRightRadius.width(), rect.maxY()));
addLineTo(FloatPoint(rect.x() + bottomLeftRadius.width(), rect.maxY()));
if (bottomLeftRadius.width() > 0 || bottomLeftRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.x() + bottomLeftRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height()));
addLineTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height()));
if (topLeftRadius.width() > 0 || topLeftRadius.height() > 0)
addBezierCurveTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + topLeftRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
closeSubpath();
}
void KdPath::addRoundedRect(const FloatRect& rect, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius)
{
if (rect.isEmpty())
return;
if (rect.width() < topLeftRadius.width() + topRightRadius.width()
|| rect.width() < bottomLeftRadius.width() + bottomRightRadius.width()
|| rect.height() < topLeftRadius.height() + bottomLeftRadius.height()
|| rect.height() < topRightRadius.height() + bottomRightRadius.height()) {
// If all the radii cannot be accommodated, return a rect.
addRect(rect);
return;
}
moveTo(FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
addLineTo(FloatPoint(rect.x() + rect.width() - topRightRadius.width(), rect.y()));
addBezierCurveTo(FloatPoint(rect.x() + rect.width() - topRightRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.x() + rect.width(), rect.y() + topRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + rect.width(), rect.y() + topRightRadius.height()));
addLineTo(FloatPoint(rect.x() + rect.width(), rect.y() + rect.height() - bottomRightRadius.height()));
addBezierCurveTo(FloatPoint(rect.x() + rect.width(), rect.y() + rect.height() - bottomRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + rect.width() - bottomRightRadius.width() * gCircleControlPoint, rect.y() + rect.height()),
FloatPoint(rect.x() + rect.width() - bottomRightRadius.width(), rect.y() + rect.height()));
addLineTo(FloatPoint(rect.x() + bottomLeftRadius.width(), rect.y() + rect.height()));
addBezierCurveTo(FloatPoint(rect.x() + bottomLeftRadius.width() * gCircleControlPoint, rect.y() + rect.height()),
FloatPoint(rect.x(), rect.y() + rect.height() - bottomLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x(), rect.y() + rect.height() - bottomLeftRadius.height()));
addLineTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height()));
addBezierCurveTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + topLeftRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
closeSubpath();
}
void Path::addArcTo(const FloatPoint& point1, const FloatPoint& point2, float radius)
{
// See http://philip.html5.org/tests/canvas/suite/tests/spec.html#arcto.
const FloatPoint& point0 = m_path->m_currentPoint;
if (!radius || point0 == point1 || point1 == point2) {
addLineTo(point1);
return;
}
FloatSize v01 = point0 - point1;
FloatSize v21 = point2 - point1;
// sin(A - B) = sin(A) * cos(B) - sin(B) * cos(A)
double cross = v01.width() * v21.height() - v01.height() * v21.width();
if (fabs(cross) < 1E-10) {
// on one line
addLineTo(point1);
return;
}
double d01 = hypot(v01.width(), v01.height());
double d21 = hypot(v21.width(), v21.height());
double angle = (piDouble - fabs(asin(cross / (d01 * d21)))) * 0.5;
double span = radius * tan(angle);
double rate = span / d01;
FloatPoint startPoint = FloatPoint(point1.x() + v01.width() * rate,
point1.y() + v01.height() * rate);
rate = span / d21;
FloatPoint endPoint = FloatPoint(point1.x() + v21.width() * rate,
point1.y() + v21.height() * rate);
// Fa: large arc flag, makes the difference between SCWARC_TO and LCWARC_TO
// respectively SCCWARC_TO and LCCWARC_TO arcs. We always use small
// arcs for arcTo(), as the arc is defined as the "shortest arc" of the
// circle specified in HTML 5.
// Fs: sweep flag, specifying whether the arc is drawn in increasing (true)
// or decreasing (0) direction.
const bool anticlockwise = cross < 0;
// Translate the large arc and sweep flags into an OpenVG segment command.
const VGubyte segmentCommand = anticlockwise ? VG_SCCWARC_TO_ABS : VG_SCWARC_TO_ABS;
const VGubyte pathSegments[] = {
VG_LINE_TO_ABS,
segmentCommand
};
const VGfloat pathData[] = {
startPoint.x(), startPoint.y(),
radius, radius, 0, endPoint.x(), endPoint.y()
};
m_path->makeCompatibleContextCurrent();
vgAppendPathData(m_path->vgPath(), 2, pathSegments, pathData);
ASSERT_VG_NO_ERROR();
m_path->m_currentPoint = endPoint;
}
void Path::addBeziersForRoundedRect(const FloatRect& rect, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius)
{
bool equalWidths = (topLeftRadius.width() == topRightRadius.width() && topRightRadius.width() == bottomLeftRadius.width() && bottomLeftRadius.width() == bottomRightRadius.width());
bool equalHeights = (topLeftRadius.height() == bottomLeftRadius.height() && bottomLeftRadius.height() == topRightRadius.height() && topRightRadius.height() == bottomRightRadius.height());
if (equalWidths && equalHeights) {
CGPathAddRoundedRect(m_path, 0, rect, topLeftRadius.width(), topLeftRadius.height());
return;
}
moveTo(FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
addLineTo(FloatPoint(rect.maxX() - topRightRadius.width(), rect.y()));
addBezierCurveTo(FloatPoint(rect.maxX() - topRightRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX(), rect.y() + topRightRadius.height()));
addLineTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height()));
addBezierCurveTo(FloatPoint(rect.maxX(), rect.maxY() - bottomRightRadius.height() * gCircleControlPoint),
FloatPoint(rect.maxX() - bottomRightRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.maxX() - bottomRightRadius.width(), rect.maxY()));
addLineTo(FloatPoint(rect.x() + bottomLeftRadius.width(), rect.maxY()));
addBezierCurveTo(FloatPoint(rect.x() + bottomLeftRadius.width() * gCircleControlPoint, rect.maxY()),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x(), rect.maxY() - bottomLeftRadius.height()));
addLineTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height()));
addBezierCurveTo(FloatPoint(rect.x(), rect.y() + topLeftRadius.height() * gCircleControlPoint),
FloatPoint(rect.x() + topLeftRadius.width() * gCircleControlPoint, rect.y()),
FloatPoint(rect.x() + topLeftRadius.width(), rect.y()));
closeSubpath();
}
void KdPath::addRoundedRect(const FloatRect& rect, const FloatSize& roundingRadii)
{
if (rect.isEmpty())
return;
FloatSize radius(roundingRadii);
FloatSize halfSize(rect.width() / 2, rect.height() / 2);
// If rx is greater than half of the width of the rectangle
// then set rx to half of the width (required in SVG spec)
if (radius.width() > halfSize.width())
radius.setWidth(halfSize.width());
// If ry is greater than half of the height of the rectangle
// then set ry to half of the height (required in SVG spec)
if (radius.height() > halfSize.height())
radius.setHeight(halfSize.height());
moveTo(FloatPoint(rect.x() + radius.width(), rect.y()));
if (radius.width() < halfSize.width())
addLineTo(FloatPoint(rect.x() + rect.width() - roundingRadii.width(), rect.y()));
const int minAntiAliasingRadius = 3;
// add by weolar ©╦╬БЁщ срио╫г
if (radius.width() <= minAntiAliasingRadius && radius.height() <= minAntiAliasingRadius) {
addLineTo(FloatPoint(rect.x() + rect.width(), rect.y() + radius.height()));
} else
addBezierCurveTo(FloatPoint(rect.x() + rect.width() - radius.width() * gCircleControlPoint, rect.y()), FloatPoint(rect.x() + rect.width(), rect.y() + radius.height() * gCircleControlPoint), FloatPoint(rect.x() + rect.width(), rect.y() + radius.height()));
if (radius.height() < halfSize.height())
addLineTo(FloatPoint(rect.x() + rect.width(), rect.y() + rect.height() - radius.height()));
// add by weolar сроб╫г
if (radius.width() <= minAntiAliasingRadius && radius.height() <= minAntiAliasingRadius) {
addLineTo(FloatPoint(rect.x() + rect.width() - radius.width(), rect.y() + rect.height()));
} else
addBezierCurveTo(FloatPoint(rect.x() + rect.width(), rect.y() + rect.height() - radius.height() * gCircleControlPoint), FloatPoint(rect.x() + rect.width() - radius.width() * gCircleControlPoint, rect.y() + rect.height()), FloatPoint(rect.x() + rect.width() - radius.width(), rect.y() + rect.height()));
if (radius.width() < halfSize.width())
addLineTo(FloatPoint(rect.x() + radius.width(), rect.y() + rect.height()));
// add by weolar вСоб╫г
if (radius.width() <= minAntiAliasingRadius && radius.height() <= minAntiAliasingRadius) {
addLineTo(FloatPoint(rect.x(), rect.y() + rect.height() - radius.height()));
} else
addBezierCurveTo(FloatPoint(rect.x() + radius.width() * gCircleControlPoint, rect.y() + rect.height()), FloatPoint(rect.x(), rect.y() + rect.height() - radius.height() * gCircleControlPoint), FloatPoint(rect.x(), rect.y() + rect.height() - radius.height()));
if (radius.height() < halfSize.height())
addLineTo(FloatPoint(rect.x(), rect.y() + radius.height()));
// add by weolar вСио╫г
if (radius.width() <= minAntiAliasingRadius && radius.height() <= minAntiAliasingRadius) {
addLineTo(FloatPoint(rect.x() + radius.width(), rect.y()));
} else
addBezierCurveTo(FloatPoint(rect.x(), rect.y() + radius.height() * gCircleControlPoint), FloatPoint(rect.x() + radius.width() * gCircleControlPoint, rect.y()), FloatPoint(rect.x() + radius.width(), rect.y()));
closeSubpath();
}
void Path::addEllipse(const FloatRect& rect)
{
if (rect.isEmpty()) {
moveTo(rect.location());
if (rect.width() > FLT_EPSILON) {
addLineTo(FloatPoint(rect.x() + rect.width(), rect.y()));
closeSubpath();
} else if (rect.height() > FLT_EPSILON) {
addLineTo(FloatPoint(rect.x(), rect.y() + rect.height()));
closeSubpath();
}
return;
}
m_path->makeCompatibleContextCurrent();
VGUErrorCode error = vguEllipse(m_path->vgPath(),
rect.x() + rect.width() / 2.0, rect.y() + rect.height() / 2.0,
rect.width(), rect.height());
ASSERT(error == VGU_NO_ERROR);
}