void QTriangulatingStroker::cubicTo(const qreal *pts)
{
const QPointF *p = (const QPointF *) pts;
QBezier bezier = QBezier::fromPoints(*(p - 1), p[0], p[1], p[2]);
QRectF bounds = bezier.bounds();
float rad = qMax(bounds.width(), bounds.height());
int threshold = qMin<float>(64, (rad + m_curvyness_add) * m_curvyness_mul);
if (threshold < 4)
threshold = 4;
qreal threshold_minus_1 = threshold - 1;
float vx, vy;
float cx = m_cx, cy = m_cy;
float x, y;
for (int i=1; i<threshold; ++i) {
qreal t = qreal(i) / threshold_minus_1;
QPointF p = bezier.pointAt(t);
x = p.x();
y = p.y();
normalVector(cx, cy, x, y, &vx, &vy);
emitLineSegment(x, y, vx, vy);
cx = x;
cy = y;
}
m_cx = cx;
m_cy = cy;
m_nvx = vx;
m_nvy = vy;
}
void QDashedStrokeProcessor::process(const QVectorPath &path, const QPen &pen, const QRectF &clip)
{
const qreal *pts = path.points();
const QPainterPath::ElementType *types = path.elements();
int count = path.elementCount();
bool cosmetic = pen.isCosmetic();
m_points.reset();
m_types.reset();
m_points.reserve(path.elementCount());
m_types.reserve(path.elementCount());
qreal width = qpen_widthf(pen);
if (width == 0)
width = 1;
m_dash_stroker.setDashPattern(pen.dashPattern());
m_dash_stroker.setStrokeWidth(cosmetic ? width * m_inv_scale : width);
m_dash_stroker.setDashOffset(pen.dashOffset());
m_dash_stroker.setMiterLimit(pen.miterLimit());
m_dash_stroker.setClipRect(clip);
float curvynessAdd, curvynessMul;
// simplify pens that are thin in device size (2px wide or less)
if (width < 2.5 && (cosmetic || m_inv_scale == 1)) {
curvynessAdd = 0.5;
curvynessMul = CURVE_FLATNESS / m_inv_scale;
} else if (cosmetic) {
curvynessAdd= width / 2;
curvynessMul= CURVE_FLATNESS;
} else {
curvynessAdd = width * m_inv_scale;
curvynessMul = CURVE_FLATNESS / m_inv_scale;
}
if (count < 2)
return;
const qreal *endPts = pts + (count<<1);
m_dash_stroker.begin(this);
if (!types) {
m_dash_stroker.moveTo(pts[0], pts[1]);
pts += 2;
while (pts < endPts) {
m_dash_stroker.lineTo(pts[0], pts[1]);
pts += 2;
}
} else {
while (pts < endPts) {
switch (*types) {
case QPainterPath::MoveToElement:
m_dash_stroker.moveTo(pts[0], pts[1]);
pts += 2;
++types;
break;
case QPainterPath::LineToElement:
m_dash_stroker.lineTo(pts[0], pts[1]);
pts += 2;
++types;
break;
case QPainterPath::CurveToElement: {
QBezier b = QBezier::fromPoints(*(((const QPointF *) pts) - 1),
*(((const QPointF *) pts)),
*(((const QPointF *) pts) + 1),
*(((const QPointF *) pts) + 2));
QRectF bounds = b.bounds();
float rad = qMax(bounds.width(), bounds.height());
int threshold = qMin<float>(64, (rad + curvynessAdd) * curvynessMul);
if (threshold < 4)
threshold = 4;
qreal threshold_minus_1 = threshold - 1;
for (int i=0; i<threshold; ++i) {
QPointF pt = b.pointAt(i / threshold_minus_1);
m_dash_stroker.lineTo(pt.x(), pt.y());
}
pts += 6;
types += 3;
break; }
default: break;
}
}
}
m_dash_stroker.end();
}
void QGL2PEXVertexArray::addPath(const QVectorPath &path, GLfloat curveInverseScale, bool outline)
{
const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
const QPainterPath::ElementType* const elements = path.elements();
if (boundingRectDirty) {
minX = maxX = points[0].x();
minY = maxY = points[0].y();
boundingRectDirty = false;
}
if (!outline && !path.isConvex())
addCentroid(path, 0);
int lastMoveTo = vertexArray.size();
vertexArray.add(points[0]); // The first element is always a moveTo
do {
if (!elements) {
// qDebug("QVectorPath has no elements");
// If the path has a null elements pointer, the elements implicitly
// start with a moveTo (already added) and continue with lineTos:
for (int i=1; i<path.elementCount(); ++i)
lineToArray(points[i].x(), points[i].y());
break;
}
// qDebug("QVectorPath has element types");
for (int i=1; i<path.elementCount(); ++i) {
switch (elements[i]) {
case QPainterPath::MoveToElement:
if (!outline)
addClosingLine(lastMoveTo);
// qDebug("element[%d] is a MoveToElement", i);
vertexArrayStops.add(vertexArray.size());
if (!outline) {
if (!path.isConvex()) addCentroid(path, i);
lastMoveTo = vertexArray.size();
}
lineToArray(points[i].x(), points[i].y()); // Add the moveTo as a new vertex
break;
case QPainterPath::LineToElement:
// qDebug("element[%d] is a LineToElement", i);
lineToArray(points[i].x(), points[i].y());
break;
case QPainterPath::CurveToElement: {
QBezier b = QBezier::fromPoints(*(((const QPointF *) points) + i - 1),
points[i],
points[i+1],
points[i+2]);
QRectF bounds = b.bounds();
// threshold based on same algorithm as in qtriangulatingstroker.cpp
int threshold = qMin<float>(64, qMax(bounds.width(), bounds.height()) * 3.14f / (curveInverseScale * 6));
if (threshold < 3) threshold = 3;
qreal one_over_threshold_minus_1 = qreal(1) / (threshold - 1);
for (int t=0; t<threshold; ++t) {
QPointF pt = b.pointAt(t * one_over_threshold_minus_1);
lineToArray(pt.x(), pt.y());
}
i += 2;
break; }
default:
break;
}
}
} while (0);
if (!outline)
addClosingLine(lastMoveTo);
vertexArrayStops.add(vertexArray.size());
}
void QDashedStrokeProcessor::process(const QVectorPath &path, const QPen &pen)
{
const qreal *pts = path.points();
const QPainterPath::ElementType *types = path.elements();
int count = path.elementCount();
m_points.reset();
m_types.reset();
qreal width = qpen_widthf(pen);
if (width == 0)
width = 1;
m_dash_stroker.setDashPattern(pen.dashPattern());
m_dash_stroker.setStrokeWidth(pen.isCosmetic() ? width * m_inv_scale : width);
m_dash_stroker.setMiterLimit(pen.miterLimit());
qreal curvyness = sqrt(width) * m_inv_scale / 8;
if (count < 2)
return;
const qreal *endPts = pts + (count<<1);
m_dash_stroker.begin(this);
if (!types) {
m_dash_stroker.moveTo(pts[0], pts[1]);
pts += 2;
while (pts < endPts) {
m_dash_stroker.lineTo(pts[0], pts[1]);
pts += 2;
}
} else {
while (pts < endPts) {
switch (*types) {
case QPainterPath::MoveToElement:
m_dash_stroker.moveTo(pts[0], pts[1]);
pts += 2;
++types;
break;
case QPainterPath::LineToElement:
m_dash_stroker.lineTo(pts[0], pts[1]);
pts += 2;
++types;
break;
case QPainterPath::CurveToElement: {
QBezier b = QBezier::fromPoints(*(((const QPointF *) pts) - 1),
*(((const QPointF *) pts)),
*(((const QPointF *) pts) + 1),
*(((const QPointF *) pts) + 2));
QRectF bounds = b.bounds();
int threshold = qMin<float>(64, qMax(bounds.width(), bounds.height()) * curvyness);
if (threshold < 4)
threshold = 4;
qreal threshold_minus_1 = threshold - 1;
for (int i=0; i<threshold; ++i) {
QPointF pt = b.pointAt(i / threshold_minus_1);
m_dash_stroker.lineTo(pt.x(), pt.y());
}
pts += 6;
types += 3;
break; }
default: break;
}
}
}
m_dash_stroker.end();
}
