// Accelerated paths
void QBlitterPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
{
Q_D(QBlitterPaintEngine);
if (path.shape() == QVectorPath::RectangleHint) {
QRectF rect(((QPointF *) path.points())[0], ((QPointF *) path.points())[2]);
fillRect(rect, brush);
} else {
d->lock();
d->pmData->markRasterOverlay(path);
QRasterPaintEngine::fill(path, brush);
}
}
void QGL2PEXVertexArray::addCentroid(const QVectorPath &path, int subPathIndex)
{
const QPointF *const points = reinterpret_cast<const QPointF *>(path.points());
const QPainterPath::ElementType *const elements = path.elements();
QPointF sum = points[subPathIndex];
int count = 1;
for (int i = subPathIndex + 1; i < path.elementCount() && (!elements || elements[i] != QPainterPath::MoveToElement); ++i) {
sum += points[i];
++count;
}
const QPointF centroid = sum / qreal(count);
vertexArray.add(centroid);
}
Q_GUI_EXPORT QPainterPath qt_painterPathFromVectorPath(const QVectorPath &path)
{
const qreal *points = path.points();
const QPainterPath::ElementType *types = path.elements();
QPainterPath p;
if (types) {
int id = 0;
for (int i=0; i<path.elementCount(); ++i) {
switch(types[i]) {
case QPainterPath::MoveToElement:
p.moveTo(QPointF(points[id], points[id+1]));
id+=2;
break;
case QPainterPath::LineToElement:
p.lineTo(QPointF(points[id], points[id+1]));
id+=2;
break;
case QPainterPath::CurveToElement: {
QPointF p1(points[id], points[id+1]);
QPointF p2(points[id+2], points[id+3]);
QPointF p3(points[id+4], points[id+5]);
p.cubicTo(p1, p2, p3);
id+=6;
break;
}
case QPainterPath::CurveToDataElement:
;
break;
}
}
} else {
p.moveTo(QPointF(points[0], points[1]));
int id = 2;
for (int i=1; i<path.elementCount(); ++i) {
p.lineTo(QPointF(points[id], points[id+1]));
id+=2;
}
}
if (path.hints() & QVectorPath::WindingFill)
p.setFillRule(Qt::WindingFill);
return p;
}
void QEmulationPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
{
QPainterState *s = state();
if (s->bgMode == Qt::OpaqueMode && pen.style() > Qt::SolidLine) {
QPen bgPen = pen;
bgPen.setBrush(s->bgBrush);
bgPen.setStyle(Qt::SolidLine);
real_engine->stroke(path, bgPen);
}
QBrush brush = pen.brush();
QPen copy = pen;
Qt::BrushStyle style = qbrush_style(brush);
if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
const QGradient *g = brush.gradient();
if (g->coordinateMode() > QGradient::LogicalMode) {
if (g->coordinateMode() == QGradient::StretchToDeviceMode) {
QTransform mat = brush.transform();
mat.scale(real_engine->painter()->device()->width(), real_engine->painter()->device()->height());
brush.setTransform(mat);
copy.setBrush(brush);
real_engine->stroke(path, copy);
return;
} else if (g->coordinateMode() == QGradient::ObjectBoundingMode) {
QTransform mat = brush.transform();
QRectF r = path.controlPointRect();
mat.translate(r.x(), r.y());
mat.scale(r.width(), r.height());
brush.setTransform(mat);
copy.setBrush(brush);
real_engine->stroke(path, copy);
return;
}
}
}
real_engine->stroke(path, pen);
}
void QEmulationPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
{
QPainterState *s = state();
if (s->bgMode == Qt::OpaqueMode) {
Qt::BrushStyle style = brush.style();
if (style >= Qt::Dense1Pattern && style <= Qt::DiagCrossPattern)
real_engine->fill(path, s->bgBrush);
}
Qt::BrushStyle style = qbrush_style(brush);
if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
const QGradient *g = brush.gradient();
if (g->coordinateMode() > QGradient::LogicalMode) {
if (g->coordinateMode() == QGradient::StretchToDeviceMode) {
QBrush copy = brush;
QTransform mat = copy.transform();
mat.scale(real_engine->painter()->device()->width(), real_engine->painter()->device()->height());
copy.setTransform(mat);
real_engine->fill(path, copy);
return;
} else if (g->coordinateMode() == QGradient::ObjectBoundingMode) {
QBrush copy = brush;
QTransform mat = copy.transform();
QRectF r = path.controlPointRect();
mat.translate(r.x(), r.y());
mat.scale(r.width(), r.height());
copy.setTransform(mat);
real_engine->fill(path, copy);
return;
}
}
}
real_engine->fill(path, brush);
}
void QTriangulatingStroker::process(const QVectorPath &path, const QPen &pen, const QRectF &)
{
const qreal *pts = path.points();
const QPainterPath::ElementType *types = path.elements();
int count = path.elementCount();
if (count < 2)
return;
float realWidth = qpen_widthf(pen);
if (realWidth == 0)
realWidth = 1;
m_width = realWidth / 2;
bool cosmetic = pen.isCosmetic();
if (cosmetic) {
m_width = m_width * m_inv_scale;
}
m_join_style = qpen_joinStyle(pen);
m_cap_style = qpen_capStyle(pen);
m_vertices.reset();
m_miter_limit = pen.miterLimit() * qpen_widthf(pen);
// The curvyness is based on the notion that I originally wanted
// roughly one line segment pr 4 pixels. This may seem little, but
// because we sample at constantly incrementing B(t) E [0<t<1], we
// will get longer segments where the curvature is small and smaller
// segments when the curvature is high.
//
// To get a rough idea of the length of each curve, I pretend that
// the curve is a 90 degree arc, whose radius is
// qMax(curveBounds.width, curveBounds.height). Based on this
// logic we can estimate the length of the outline edges based on
// the radius + a pen width and adjusting for scale factors
// depending on if the pen is cosmetic or not.
//
// The curvyness value of PI/14 was based on,
// arcLength = 2*PI*r/4 = PI*r/2 and splitting length into somewhere
// between 3 and 8 where 5 seemed to be give pretty good results
// hence: Q_PI/14. Lower divisors will give more detail at the
// direct cost of performance.
// simplfy pens that are thin in device size (2px wide or less)
if (realWidth < 2.5 && (cosmetic || m_inv_scale == 1)) {
if (m_cap_style == Qt::RoundCap)
m_cap_style = Qt::SquareCap;
if (m_join_style == Qt::RoundJoin)
m_join_style = Qt::MiterJoin;
m_curvyness_add = 0.5;
m_curvyness_mul = CURVE_FLATNESS / m_inv_scale;
m_roundness = 1;
} else if (cosmetic) {
m_curvyness_add = realWidth / 2;
m_curvyness_mul = CURVE_FLATNESS;
m_roundness = qMax<int>(4, realWidth * CURVE_FLATNESS);
} else {
m_curvyness_add = m_width;
m_curvyness_mul = CURVE_FLATNESS / m_inv_scale;
m_roundness = qMax<int>(4, realWidth * m_curvyness_mul);
}
// Over this level of segmentation, there doesn't seem to be any
// benefit, even for huge penWidth
if (m_roundness > 24)
m_roundness = 24;
m_sin_theta = qFastSin(Q_PI / m_roundness);
m_cos_theta = qFastCos(Q_PI / m_roundness);
const qreal *endPts = pts + (count<<1);
const qreal *startPts = 0;
Qt::PenCapStyle cap = m_cap_style;
if (!types) {
// skip duplicate points
while((pts + 2) < endPts && pts[0] == pts[2] && pts[1] == pts[3])
pts += 2;
if ((pts + 2) == endPts)
return;
startPts = pts;
bool endsAtStart = startPts[0] == *(endPts-2) && startPts[1] == *(endPts-1);
if (endsAtStart || path.hasImplicitClose())
m_cap_style = Qt::FlatCap;
moveTo(pts);
m_cap_style = cap;
pts += 2;
lineTo(pts);
pts += 2;
while (pts < endPts) {
if (m_cx != pts[0] || m_cy != pts[1]) {
join(pts);
lineTo(pts);
}
pts += 2;
}
endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
} else {
bool endsAtStart = false;
while (pts < endPts) {
switch (*types) {
case QPainterPath::MoveToElement: {
if (pts != path.points())
endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
startPts = pts;
int end = (endPts - pts) / 2;
int i = 2; // Start looking to ahead since we never have two moveto's in a row
while (i<end && types[i] != QPainterPath::MoveToElement) {
++i;
}
endsAtStart = startPts[0] == pts[i*2 - 2] && startPts[1] == pts[i*2 - 1];
if (endsAtStart || path.hasImplicitClose())
m_cap_style = Qt::FlatCap;
moveTo(pts);
m_cap_style = cap;
pts+=2;
++types;
break; }
case QPainterPath::LineToElement:
if (*(types - 1) != QPainterPath::MoveToElement)
join(pts);
lineTo(pts);
pts+=2;
++types;
break;
case QPainterPath::CurveToElement:
if (*(types - 1) != QPainterPath::MoveToElement)
join(pts);
cubicTo(pts);
pts+=6;
types+=3;
break;
default:
Q_ASSERT(false);
break;
}
}
endCapOrJoinClosed(startPts, pts-2, path.hasImplicitClose(), endsAtStart);
}
}
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 QPaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
{
#ifdef QT_DEBUG_DRAW
qDebug() << "QPaintEngineEx::stroke()" << pen;
#endif
Q_D(QPaintEngineEx);
if (path.isEmpty())
return;
if (!d->strokeHandler) {
d->strokeHandler = new StrokeHandler(path.elementCount()+4);
d->stroker.setMoveToHook(qpaintengineex_moveTo);
d->stroker.setLineToHook(qpaintengineex_lineTo);
d->stroker.setCubicToHook(qpaintengineex_cubicTo);
}
if (!qpen_fast_equals(pen, d->strokerPen)) {
d->strokerPen = pen;
d->stroker.setJoinStyle(pen.joinStyle());
d->stroker.setCapStyle(pen.capStyle());
d->stroker.setMiterLimit(pen.miterLimit());
qreal penWidth = pen.widthF();
if (penWidth == 0)
d->stroker.setStrokeWidth(1);
else
d->stroker.setStrokeWidth(penWidth);
Qt::PenStyle style = pen.style();
if (style == Qt::SolidLine) {
d->activeStroker = &d->stroker;
} else if (style == Qt::NoPen) {
d->activeStroker = 0;
} else {
d->dasher.setDashPattern(pen.dashPattern());
d->dasher.setDashOffset(pen.dashOffset());
d->activeStroker = &d->dasher;
}
}
if (!d->activeStroker) {
return;
}
if (pen.style() > Qt::SolidLine) {
if (pen.isCosmetic()) {
d->activeStroker->setClipRect(d->exDeviceRect);
} else {
QRectF clipRect = state()->matrix.inverted().mapRect(QRectF(d->exDeviceRect));
d->activeStroker->setClipRect(clipRect);
}
}
const QPainterPath::ElementType *types = path.elements();
const qreal *points = path.points();
int pointCount = path.elementCount();
const qreal *lastPoint = points + (pointCount<<1);
d->strokeHandler->types.reset();
d->strokeHandler->pts.reset();
// Some engines might decide to optimize for the non-shape hint later on...
uint flags = QVectorPath::WindingFill;
if (path.elementCount() > 2)
flags |= QVectorPath::NonConvexShapeMask;
if (d->stroker.capStyle() == Qt::RoundCap || d->stroker.joinStyle() == Qt::RoundJoin)
flags |= QVectorPath::CurvedShapeMask;
// ### Perspective Xforms are currently not supported...
if (!pen.isCosmetic()) {
// We include cosmetic pens in this case to avoid having to
// change the current transform. Normal transformed,
// non-cosmetic pens will be transformed as part of fill
// later, so they are also covered here..
d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
d->activeStroker->begin(d->strokeHandler);
if (types) {
while (points < lastPoint) {
switch (*types) {
case QPainterPath::MoveToElement:
d->activeStroker->moveTo(points[0], points[1]);
points += 2;
++types;
break;
case QPainterPath::LineToElement:
d->activeStroker->lineTo(points[0], points[1]);
points += 2;
++types;
break;
case QPainterPath::CurveToElement:
d->activeStroker->cubicTo(points[0], points[1],
points[2], points[3],
points[4], points[5]);
points += 6;
types += 3;
flags |= QVectorPath::CurvedShapeMask;
break;
default:
break;
}
}
if (path.hasImplicitClose())
d->activeStroker->lineTo(path.points()[0], path.points()[1]);
} else {
d->activeStroker->moveTo(points[0], points[1]);
points += 2;
while (points < lastPoint) {
d->activeStroker->lineTo(points[0], points[1]);
points += 2;
}
if (path.hasImplicitClose())
d->activeStroker->lineTo(path.points()[0], path.points()[1]);
}
d->activeStroker->end();
if (!d->strokeHandler->types.size()) // an empty path...
return;
QVectorPath strokePath(d->strokeHandler->pts.data(),
d->strokeHandler->types.size(),
d->strokeHandler->types.data(),
flags);
fill(strokePath, pen.brush());
} else {
// For cosmetic pens we need a bit of trickery... We to process xform the input points
if (state()->matrix.type() >= QTransform::TxProject) {
QPainterPath painterPath = state()->matrix.map(path.convertToPainterPath());
d->activeStroker->strokePath(painterPath, d->strokeHandler, QTransform());
} else {
d->activeStroker->setCurveThresholdFromTransform(QTransform());
d->activeStroker->begin(d->strokeHandler);
if (types) {
while (points < lastPoint) {
switch (*types) {
case QPainterPath::MoveToElement: {
QPointF pt = (*(QPointF *) points) * state()->matrix;
d->activeStroker->moveTo(pt.x(), pt.y());
points += 2;
++types;
break;
}
case QPainterPath::LineToElement: {
QPointF pt = (*(QPointF *) points) * state()->matrix;
d->activeStroker->lineTo(pt.x(), pt.y());
points += 2;
++types;
break;
}
case QPainterPath::CurveToElement: {
QPointF c1 = ((QPointF *) points)[0] * state()->matrix;
QPointF c2 = ((QPointF *) points)[1] * state()->matrix;
QPointF e = ((QPointF *) points)[2] * state()->matrix;
d->activeStroker->cubicTo(c1.x(), c1.y(), c2.x(), c2.y(), e.x(), e.y());
points += 6;
types += 3;
flags |= QVectorPath::CurvedShapeMask;
break;
}
default:
break;
}
}
if (path.hasImplicitClose()) {
QPointF pt = * ((QPointF *) path.points()) * state()->matrix;
d->activeStroker->lineTo(pt.x(), pt.y());
}
} else {
QPointF p = ((QPointF *)points)[0] * state()->matrix;
d->activeStroker->moveTo(p.x(), p.y());
points += 2;
while (points < lastPoint) {
QPointF p = ((QPointF *)points)[0] * state()->matrix;
d->activeStroker->lineTo(p.x(), p.y());
points += 2;
}
if (path.hasImplicitClose())
d->activeStroker->lineTo(p.x(), p.y());
}
d->activeStroker->end();
}
QVectorPath strokePath(d->strokeHandler->pts.data(),
d->strokeHandler->types.size(),
d->strokeHandler->types.data(),
flags);
QTransform xform = state()->matrix;
state()->matrix = QTransform();
transformChanged();
QBrush brush = pen.brush();
if (qbrush_style(brush) != Qt::SolidPattern)
brush.setTransform(brush.transform() * xform);
fill(strokePath, brush);
state()->matrix = xform;
transformChanged();
}
}
void QOutlineMapper::endOutline()
{
closeSubpath();
if (m_elements.isEmpty()) {
memset(&m_outline, 0, sizeof(m_outline));
return;
}
QPointF *elements = m_elements.data();
// Transform the outline
if (m_txop == QTransform::TxNone) {
// Nothing to do.
} else if (m_txop == QTransform::TxTranslate) {
for (int i = 0; i < m_elements.size(); ++i) {
QPointF &e = elements[i];
e = QPointF(e.x() + m_dx, e.y() + m_dy);
}
} else if (m_txop == QTransform::TxScale) {
for (int i = 0; i < m_elements.size(); ++i) {
QPointF &e = elements[i];
e = QPointF(m_m11 * e.x() + m_dx, m_m22 * e.y() + m_dy);
}
} else if (m_txop < QTransform::TxProject) {
for (int i = 0; i < m_elements.size(); ++i) {
QPointF &e = elements[i];
e = QPointF(m_m11 * e.x() + m_m21 * e.y() + m_dx,
m_m22 * e.y() + m_m12 * e.x() + m_dy);
}
} else {
const QVectorPath vp((qreal *)elements, m_elements.size(),
m_element_types.size() ? m_element_types.data() : 0);
QPainterPath path = vp.convertToPainterPath();
path = QTransform(m_m11, m_m12, m_m13, m_m21, m_m22, m_m23, m_dx, m_dy, m_m33).map(path);
if (!(m_outline.flags & QT_FT_OUTLINE_EVEN_ODD_FILL))
path.setFillRule(Qt::WindingFill);
uint old_txop = m_txop;
m_txop = QTransform::TxNone;
if (path.isEmpty())
m_valid = false;
else
convertPath(path);
m_txop = old_txop;
return;
}
if (m_round_coords) {
// round coordinates to match outlines drawn with drawLine_midpoint_i
for (int i = 0; i < m_elements.size(); ++i)
elements[i] = QPointF(qFloor(elements[i].x() + aliasedCoordinateDelta),
qFloor(elements[i].y() + aliasedCoordinateDelta));
}
controlPointRect = boundingRect(elements, m_elements.size());
#ifdef QT_DEBUG_CONVERT
printf(" - control point rect (%.2f, %.2f) %.2f x %.2f, clip=(%d,%d, %dx%d)\n",
controlPointRect.x(), controlPointRect.y(),
controlPointRect.width(), controlPointRect.height(),
m_clip_rect.x(), m_clip_rect.y(), m_clip_rect.width(), m_clip_rect.height());
#endif
// Check for out of dev bounds...
const bool do_clip = !m_in_clip_elements && ((controlPointRect.left() < -QT_RASTER_COORD_LIMIT
|| controlPointRect.right() > QT_RASTER_COORD_LIMIT
|| controlPointRect.top() < -QT_RASTER_COORD_LIMIT
|| controlPointRect.bottom() > QT_RASTER_COORD_LIMIT
|| controlPointRect.width() > QT_RASTER_COORD_LIMIT
|| controlPointRect.height() > QT_RASTER_COORD_LIMIT));
if (do_clip) {
clipElements(elements, elementTypes(), m_elements.size());
} else {
convertElements(elements, elementTypes(), m_elements.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();
}
static ComPtr<ID2D1PathGeometry1> vectorPathToID2D1PathGeometry(const QVectorPath &path, bool alias)
{
ComPtr<ID2D1PathGeometry1> pathGeometry;
HRESULT hr = factory()->CreatePathGeometry(pathGeometry.GetAddressOf());
if (FAILED(hr)) {
qWarning("%s: Could not create path geometry: %#x", __FUNCTION__, hr);
return NULL;
}
if (path.isEmpty())
return pathGeometry;
ComPtr<ID2D1GeometrySink> sink;
hr = pathGeometry->Open(sink.GetAddressOf());
if (FAILED(hr)) {
qWarning("%s: Could not create geometry sink: %#x", __FUNCTION__, hr);
return NULL;
}
sink->SetFillMode(path.hasWindingFill() ? D2D1_FILL_MODE_WINDING
: D2D1_FILL_MODE_ALTERNATE);
bool inFigure = false;
const QPainterPath::ElementType *types = path.elements();
const int count = path.elementCount();
const qreal *points = 0;
QScopedArrayPointer<qreal> rounded_points;
if (alias) {
// Aliased painting, round to whole numbers
rounded_points.reset(new qreal[count * 2]);
points = rounded_points.data();
for (int i = 0; i < (count * 2); i++)
rounded_points[i] = qRound(path.points()[i]);
} else {
// Antialiased painting, keep original numbers
points = path.points();
}
Q_ASSERT(points);
if (types) {
qreal x, y;
for (int i = 0; i < count; i++) {
x = points[i * 2];
y = points[i * 2 + 1];
switch (types[i]) {
case QPainterPath::MoveToElement:
if (inFigure)
sink->EndFigure(D2D1_FIGURE_END_OPEN);
sink->BeginFigure(D2D1::Point2F(x, y), D2D1_FIGURE_BEGIN_FILLED);
inFigure = true;
break;
case QPainterPath::LineToElement:
sink->AddLine(D2D1::Point2F(x, y));
break;
case QPainterPath::CurveToElement:
{
Q_ASSERT((i + 2) < count);
Q_ASSERT(types[i+1] == QPainterPath::CurveToDataElement);
Q_ASSERT(types[i+2] == QPainterPath::CurveToDataElement);
i++;
const qreal x2 = points[i * 2];
const qreal y2 = points[i * 2 + 1];
i++;
const qreal x3 = points[i * 2];
const qreal y3 = points[i * 2 + 1];
D2D1_BEZIER_SEGMENT segment = {
D2D1::Point2F(x, y),
D2D1::Point2F(x2, y2),
D2D1::Point2F(x3, y3)
};
sink->AddBezier(segment);
}
break;
case QPainterPath::CurveToDataElement:
qWarning("%s: Unhandled Curve Data Element", __FUNCTION__);
break;
}
}
} else {
sink->BeginFigure(D2D1::Point2F(points[0], points[1]), D2D1_FIGURE_BEGIN_FILLED);
inFigure = true;
for (int i = 1; i < count; i++)
sink->AddLine(D2D1::Point2F(points[i * 2], points[i * 2 + 1]));
}
if (inFigure) {
if (path.hasImplicitClose())
sink->AddLine(D2D1::Point2F(points[0], points[1]));
sink->EndFigure(D2D1_FIGURE_END_OPEN);
}
sink->Close();
return pathGeometry;
}
