OXPicture FX::gradient(const QPoint c1, int r1, const QPoint c2, int r2,
const ColorArray &colors,
const PointArray &stops) {
XRadialGradient rg = {
{ c1.x() << 16, c1.y() << 16, r1 << 16 },
{ c2.x() << 16, c2.y() << 16, r2 << 16 } };
QVarLengthArray<XRenderColor> cs(colors.size());
for (int i = 0; i < colors.size(); ++i)
setColor(cs[i], colors.at(i));
XFixed *stps;
if (stops.size() < 2) {
stps = new XFixed[2];
stps[0] = 0; stps[1] = (1<<16);
}
else {
int d = ((int)(sqrt(pow(c2.x()-c1.x(),2)+pow(c2.y()-c1.y(),2)))) << 16;
stps = new XFixed[stops.size()];
for (int i = 0; i < stops.size(); ++i)
{
if (stops.at(i) < 0) continue;
if (stops.at(i) > 1) break;
stps[i] = stops.at(i)*d;
}
}
XFlush (dpy);
OXPicture lgp = XRenderCreateRadialGradient(dpy, &rg, stps, &cs[0],
qMin(qMax(stops.size(),2),
colors.size()));
delete[] stps;
return lgp;
}
OXPicture FX::gradient(const QPoint start, const QPoint stop,
const ColorArray &colors,
const PointArray &stops) {
XLinearGradient lg = {
{ start.x() << 16, start.y() << 16 },
{ stop.x() << 16, stop.y() << 16} };
QVarLengthArray<XRenderColor> cs(colors.size());
for (int i = 0; i < colors.size(); ++i)
setColor(cs[i], colors.at(i));
XFixed *stps;
if (stops.size() < 2) {
stps = new XFixed[2];
stps[0] = 0; stps[1] = (1<<16);
}
else {
int d = (1<<16);
stps = new XFixed[stops.size()];
for (int i = 0; i < stops.size(); ++i) {
if (stops.at(i) < 0) continue;
if (stops.at(i) > 1) break;
stps[i] = stops.at(i)*d;
}
}
XFlush (dpy);
OXPicture lgp = XRenderCreateLinearGradient(dpy, &lg, stps, &cs[0],
qMin(qMax(stops.size(),2),
colors.size()));
delete[] stps;
return lgp;
}