void TextureMapperLayer::paintUsingOverlapRegions(const TextureMapperPaintOptions& options)
{
Region overlapRegion;
Region nonOverlapRegion;
computeOverlapRegions(overlapRegion, nonOverlapRegion, ResolveSelfOverlapAlways);
if (overlapRegion.isEmpty()) {
paintSelfAndChildrenWithReplica(options);
return;
}
Vector<IntRect> rects;
nonOverlapRegion.translate(options.offset);
rects = nonOverlapRegion.rects();
for (size_t i = 0; i < rects.size(); ++i) {
options.textureMapper->beginClip(TransformationMatrix(), rects[i]);
paintSelfAndChildrenWithReplica(options);
options.textureMapper->endClip();
}
rects = overlapRegion.rects();
IntSize maxTextureSize = options.textureMapper->maxTextureSize();
IntRect rect;
for (size_t i = 0; i < rects.size(); ++i) {
rect = rects[i];
for (int x = rect.x(); x < rect.maxX(); x += maxTextureSize.width()) {
for (int y = rect.y(); y < rect.maxY(); y += maxTextureSize.height()) {
IntRect tileRect(IntPoint(x, y), maxTextureSize);
tileRect.intersect(rect);
paintWithIntermediateSurface(options, tileRect);
}
}
}
}
void TextureMapperLayer::paintUsingOverlapRegions(const TextureMapperPaintOptions& options)
{
Region overlapRegion;
Region nonOverlapRegion;
computeOverlapRegions(overlapRegion, nonOverlapRegion, ResolveSelfOverlapAlways);
if (overlapRegion.isEmpty()) {
paintSelfAndChildrenWithReplica(options);
return;
}
// Having both overlap and non-overlap regions carries some overhead. Avoid it if the overlap area
// is big anyway.
if (overlapRegion.bounds().size().area() > nonOverlapRegion.bounds().size().area()) {
overlapRegion.unite(nonOverlapRegion);
nonOverlapRegion = Region();
}
nonOverlapRegion.translate(options.offset);
Vector<IntRect> rects = nonOverlapRegion.rects();
for (size_t i = 0; i < rects.size(); ++i) {
IntRect rect = rects[i];
if (!rect.intersects(options.textureMapper->clipBounds()))
continue;
options.textureMapper->beginClip(TransformationMatrix(), rects[i]);
paintSelfAndChildrenWithReplica(options);
options.textureMapper->endClip();
}
rects = overlapRegion.rects();
static const size_t OverlapRegionConsolidationThreshold = 4;
if (nonOverlapRegion.isEmpty() && rects.size() > OverlapRegionConsolidationThreshold) {
rects.clear();
rects.append(overlapRegion.bounds());
}
IntSize maxTextureSize = options.textureMapper->maxTextureSize();
IntRect adjustedClipBounds(options.textureMapper->clipBounds());
adjustedClipBounds.move(-options.offset);
for (size_t i = 0; i < rects.size(); ++i) {
IntRect rect = rects[i];
for (int x = rect.x(); x < rect.maxX(); x += maxTextureSize.width()) {
for (int y = rect.y(); y < rect.maxY(); y += maxTextureSize.height()) {
IntRect tileRect(IntPoint(x, y), maxTextureSize);
tileRect.intersect(rect);
if (!tileRect.intersects(adjustedClipBounds))
continue;
paintWithIntermediateSurface(options, tileRect);
}
}
}
}
