// Set libplot's filling-and-edging style. May set the line width to zero
// to turn off edging. In libplot, a 0-width line is as narrow a line as
// can be drawn.
void drvplot::set_filling_and_edging_style()
{
switch (currentShowType()) {
case drvbase::stroke:
(void)plotter->flinewidth(currentLineWidth());
(void)plotter->pencolor(plotcolor(currentR()), plotcolor(currentG()), plotcolor(currentB()));
(void)plotter->filltype(0); // no filling
break;
case drvbase::fill:
if (pathWasMerged()) {
(void)plotter->flinewidth(currentLineWidth());
(void)plotter->pencolor(plotcolor(edgeR()), plotcolor(edgeG()), plotcolor(edgeB()));
(void)plotter->fillcolor(plotcolor(fillR()), plotcolor(fillG()), plotcolor(fillB()));
} else {
(void)plotter->flinewidth(0.0); // little or no edging
(void)plotter->pencolor(plotcolor(currentR()), plotcolor(currentG()), plotcolor(currentB()));
(void)plotter->fillcolor(plotcolor(currentR()), plotcolor(currentG()), plotcolor(currentB()));
}
(void)plotter->filltype(1);
(void)plotter->fillmod("winding");
break;
case drvbase::eofill:
if (pathWasMerged()) {
(void)plotter->flinewidth(currentLineWidth());
(void)plotter->pencolor(plotcolor(edgeR()), plotcolor(edgeG()), plotcolor(edgeB()));
(void)plotter->fillcolor(plotcolor(fillR()), plotcolor(fillG()), plotcolor(fillB()));
} else {
(void)plotter->flinewidth(0.0); // little or no edging
(void)plotter->pencolor(plotcolor(currentR()), plotcolor(currentG()), plotcolor(currentB()));
(void)plotter->fillcolor(plotcolor(currentR()), plotcolor(currentG()), plotcolor(currentB()));
}
(void)plotter->filltype(1);
(void)plotter->fillmod("even-odd");
break;
default:
// cannot happen
errf << "unexpected ShowType " << (int) currentShowType();
break;
}
}
void drvSAMPL::show_path()
{
outf << "Path # " << currentNr();
if (isPolygon())
outf << " (polygon): " << endl;
else
outf << " (polyline): " << endl;
outf << "\tcurrentShowType: ";
switch (currentShowType()) {
case drvbase::stroke:
outf << "stroked";
break;
case drvbase::fill:
outf << "filled";
break;
case drvbase::eofill:
outf << "eofilled";
break;
default:
// cannot happen
outf << "unexpected ShowType " << (int) currentShowType();
break;
}
outf << endl;
outf << "\tcurrentLineWidth: " << currentLineWidth() << endl;
outf << "\tcurrentR: " << currentR() << endl;
outf << "\tcurrentG: " << currentG() << endl;
outf << "\tcurrentB: " << currentB() << endl;
outf << "\tedgeR: " << edgeR() << endl;
outf << "\tedgeG: " << edgeG() << endl;
outf << "\tedgeB: " << edgeB() << endl;
outf << "\tfillR: " << fillR() << endl;
outf << "\tfillG: " << fillG() << endl;
outf << "\tfillB: " << fillB() << endl;
outf << "\tcurrentLineCap: " << currentLineCap() << endl;
outf << "\tdashPattern: " << dashPattern() << endl;
outf << "\tPath Elements 0 to " << numberOfElementsInPath() - 1 << endl;
print_coords();
}
void drvCAIRO::show_path()
{
DashPattern dp(dashPattern());
outf << endl;
outf << " /*" << endl;
outf << " * Path # " << currentNr() ;
if (isPolygon())
outf << " (polygon):" << endl;
else
outf << " (polyline):" << endl;
outf << " */" << endl;
outf << endl;
outf << " cairo_save (cr);" << endl;
outf << " cairo_set_line_width (cr, " << currentLineWidth() << ");" << endl;
// CAIRO_LINE_CAP_BUTT - start(stop) the line exactly at the start(end) point
// CAIRO_LINE_CAP_ROUND - use a round ending, the center of the circle is the end point
// CAIRO_LINE_CAP_SQUARE - use squared ending, the center of the square is the end point
outf << " cairo_set_line_cap (cr, ";
switch( currentLineCap() ) {
case 0:
outf << "CAIRO_LINE_CAP_BUTT);" << endl;
break;
case 1:
outf << "CAIRO_LINE_CAP_ROUND);" << endl;
break;
case 2:
outf << "CAIRO_LINE_CAP_SQUARE);" << endl;
break;
default:
errf << "Unexpected currentLineCap() in cairo driver: " << currentLineCap() << endl;
outf << "CAIRO_LINE_CAP_ROUND);" << endl;
break;
}
// cairo_set_dash (cairo_t *cr, const double *dashes, int num_dashes, double offset);
// dashes :
// an array specifying alternate lengths of on and off stroke portions
//
// num_dashes :
// the length of the dashes array
//
// offset :
// an offset into the dash pattern at which the stroke should start
//
// dashPattern: has nrOfEntries, float *numbers, float offset
if (dp.nrOfEntries > 0) {
outf << " {" << endl;
outf << " double pat[" << dp.nrOfEntries << "] = {" << endl;
for (int i = 0; i < dp.nrOfEntries; i++) {
outf << " " << dp.numbers[i] << ", " << endl;
}
outf << " };" << endl;
outf << endl;
outf << " cairo_set_dash (cr, pat, " << dp.nrOfEntries << ", " << dp.offset << ");" << endl;
outf << " }" << endl;
} else {
outf << " cairo_set_dash (cr, NULL, 0, 0.0);" << endl;
}
// cairo_move_to (cr, 0.25, 0.25);
// cairo_line_to (cr, 0.5, 0.375);
outf << " /* Path Elements 0 to " << numberOfElementsInPath() - 1 << " */" << endl;
print_coords();
switch (currentShowType()) {
case drvbase::stroke:
outf << " cairo_set_source_rgb (cr, " << edgeR() << "," << edgeG() << "," << edgeB() << ");" << endl;
outf << " cairo_stroke (cr);" << endl;
break;
case drvbase::eofill:
outf << " cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);" << endl;
evenoddmode = true;
case drvbase::fill:
outf << " cairo_set_source_rgb (cr, " << fillR() << "," << fillG() << "," << fillB() << ");" << endl;
outf << " cairo_fill_preserve (cr);" << endl;
if (evenoddmode) {
outf << " cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);" << endl;
evenoddmode = false;
}
outf << " cairo_set_source_rgb (cr, " << edgeR() << "," << edgeG() << "," << edgeB() << ");" << endl;
outf << " cairo_stroke (cr);" << endl;
break;
default:
// cannot happen
outf << " // unexpected ShowType " << (int) currentShowType();
break;
}
outf << " cairo_restore (cr);" << endl;
}
/*!
\internal
*/
void QGeoMapPolygonGeometry::updateScreenPoints(const QGeoMap &map)
{
if (!screenDirty_)
return;
if (map.width() == 0 || map.height() == 0) {
clear();
return;
}
QPointF origin = map.coordinateToScreenPosition(srcOrigin_, false);
// Create the viewport rect in the same coordinate system
// as the actual points
QRectF viewport(0, 0, map.width(), map.height());
viewport.translate(-1 * origin);
QPainterPath vpPath;
vpPath.addRect(viewport);
QPainterPath ppi;
if (clipToViewport_)
ppi = srcPath_.intersected(vpPath); // get the clipped version of the path
else ppi = srcPath_;
clear();
// a polygon requires at least 3 points;
if (ppi.elementCount() < 3)
return;
// Intersection between the viewport and a concave polygon can create multiple polygons
// joined by a line at the viewport border, and poly2tri does not triangulate this very well
// so use the full src path if the resulting polygon is concave.
if (clipToViewport_) {
int changeInX = 0;
int changeInY = 0;
QPainterPath::Element e1 = ppi.elementAt(1);
QPainterPath::Element e = ppi.elementAt(0);
QVector2D edgeA(e1.x - e.x ,e1.y - e.y);
for (int i = 2; i <= ppi.elementCount(); ++i) {
e = ppi.elementAt(i % ppi.elementCount());
if (e.x == e1.x && e.y == e1.y)
continue;
QVector2D edgeB(e.x - e1.x, e.y - e1.y);
if ((edgeA.x() < 0) == (edgeB.x() >= 0))
changeInX++;
if ((edgeA.y() < 0) == (edgeB.y() >= 0))
changeInY++;
edgeA = edgeB;
e1 = e;
}
if (changeInX > 2 || changeInY > 2) // polygon is concave
ppi = srcPath_;
}
// translate the path into top-left-centric coordinates
QRectF bb = ppi.boundingRect();
ppi.translate(-bb.left(), -bb.top());
firstPointOffset_ = -1 * bb.topLeft();
ppi.closeSubpath();
screenOutline_ = ppi;
std::vector<p2t::Point*> curPts;
curPts.reserve(ppi.elementCount());
for (int i = 0; i < ppi.elementCount(); ++i) {
const QPainterPath::Element e = ppi.elementAt(i);
if (e.isMoveTo() || i == ppi.elementCount() - 1
|| (qAbs(e.x - curPts.front()->x) < 0.1
&& qAbs(e.y - curPts.front()->y) < 0.1)) {
if (curPts.size() > 2) {
p2t::CDT *cdt = new p2t::CDT(curPts);
cdt->Triangulate();
std::vector<p2t::Triangle*> tris = cdt->GetTriangles();
screenVertices_.reserve(screenVertices_.size() + int(tris.size()));
for (size_t i = 0; i < tris.size(); ++i) {
p2t::Triangle *t = tris.at(i);
for (int j = 0; j < 3; ++j) {
p2t::Point *p = t->GetPoint(j);
screenVertices_ << Point(p->x, p->y);
}
}
delete cdt;
}
curPts.clear();
curPts.reserve(ppi.elementCount() - i);
curPts.push_back(new p2t::Point(e.x, e.y));
} else if (e.isLineTo()) {
curPts.push_back(new p2t::Point(e.x, e.y));
} else {
qWarning("Unhandled element type in polygon painterpath");
}
}
if (curPts.size() > 0) {
qDeleteAll(curPts.begin(), curPts.end());
curPts.clear();
}
screenBounds_ = ppi.boundingRect();
}
