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Remove clipping against the bounding rect of paint region

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This commit is contained in:
Martin Gräßlin 2011-06-26 13:16:14 +02:00
parent 050ea5010b
commit 76eb3c3391
1 changed files with 14 additions and 34 deletions
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48
scene_opengl.cpp
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@ -479,44 +479,24 @@ void SceneOpenGL::Window::performPaint(int mask, QRegion region, WindowPaintData
if (region != infiniteRegion() && !(mask & PAINT_WINDOW_TRANSFORMED)) {
WindowQuadList quads;
const QRegion filterRegion = region.translated(-x(), -y());
const QRectF bounding = QRectF(filterRegion.boundingRect());
// first step: split all quads according to the bounding rect
// split all quads in bounding rect with the actual rects in the region
foreach (const WindowQuad &quad, data.quads) {
const QRectF quadRect(QPointF(quad.left(), quad.top()), QPointF(quad.right(), quad.bottom()));
// case 1: completely contains
if (bounding.contains(quadRect)) {
quads << quad;
continue;
}
// case 2: intersection
if (bounding.intersects(quadRect)) {
const QRectF intersected = bounding.intersected(quadRect);
quads << quad.makeSubQuad(intersected.left(), intersected.top(), intersected.right(), intersected.bottom());
}
}
if (filterRegion.numRects() > 1) {
// second step: split all quads in bounding rect with the actual rects in the region
WindowQuadList tempList;
foreach (const WindowQuad &quad, quads) {
foreach (const QRect &r, filterRegion.rects()) {
const QRectF rf(r);
const QRectF quadRect(QPointF(quad.left(), quad.top()), QPointF(quad.right(), quad.bottom()));
// case 1: completely contains, include and do not check other rects
if (rf.contains(quadRect)) {
tempList << quad;
break;
}
// case 2: intersection
if (rf.intersects(quadRect)) {
const QRectF intersected = rf.intersected(quadRect);
tempList << quad.makeSubQuad(intersected.left(), intersected.top(), intersected.right(), intersected.bottom());
}
foreach (const QRect &r, filterRegion.rects()) {
const QRectF rf(r);
const QRectF quadRect(QPointF(quad.left(), quad.top()), QPointF(quad.right(), quad.bottom()));
// case 1: completely contains, include and do not check other rects
if (rf.contains(quadRect)) {
quads << quad;
break;
}
// case 2: intersection
if (rf.intersects(quadRect)) {
const QRectF intersected = rf.intersected(quadRect);
quads << quad.makeSubQuad(intersected.left(), intersected.top(), intersected.right(), intersected.bottom());
}
}
data.quads = tempList;
} else {
data.quads = quads;
}
data.quads = quads;
}
if (!bindTexture())