void StampBrush::drawPreviewLayer(const QVector<QPoint> &points)
{
mPreviewMap.clear();
if (mStamp.isEmpty() && !mIsWangFill)
return;
if (mIsRandom) {
if (mRandomCellPicker.isEmpty())
return;
QRect bounds;
for (const QPoint &p : points)
bounds |= QRect(p, p);
SharedMap preview = SharedMap::create(mapDocument()->map()->orientation(),
bounds.size(),
mapDocument()->map()->tileSize());
std::unique_ptr<TileLayer> previewLayer {
new TileLayer(QString(), bounds.topLeft(), bounds.size())
};
for (const QPoint &p : points) {
const Cell &cell = mRandomCellPicker.pick();
previewLayer->setCell(p.x() - bounds.left(),
p.y() - bounds.top(),
cell);
}
preview->addLayer(previewLayer.release());
preview->addTilesets(preview->usedTilesets());
mPreviewMap = preview;
} else if (mIsWangFill) {
if (!mWangSet)
return;
const TileLayer *tileLayer = currentTileLayer();
if (!tileLayer)
return;
QRegion paintedRegion;
for (const QPoint &p : points)
paintedRegion += QRect(p, p);
const QRect bounds = paintedRegion.boundingRect();
SharedMap preview = SharedMap::create(mapDocument()->map()->orientation(),
bounds.size(),
mapDocument()->map()->tileSize());
std::unique_ptr<TileLayer> previewLayer {
new TileLayer(QString(), bounds.topLeft(), bounds.size())
};
WangFiller wangFiller(mWangSet,
dynamic_cast<StaggeredRenderer *>(mapDocument()->renderer()),
mapDocument()->map()->staggerAxis());
for (const QPoint &p : points) {
Cell cell = wangFiller.findFittingCell(*tileLayer,
*previewLayer,
paintedRegion,
p);
previewLayer->setCell(p.x() - bounds.left(),
p.y() - bounds.top(),
cell);
}
preview->addLayer(previewLayer.release());
preview->addTileset(mWangSet->tileset()->sharedPointer());
mPreviewMap = preview;
} else {
QRegion paintedRegion;
QVector<PaintOperation> operations;
QHash<const Map *, QRegion> regionCache;
QHash<const Map *, Map *> shiftedCopies;
for (const QPoint &p : points) {
Map *map = mStamp.randomVariation().map;
mapDocument()->unifyTilesets(map, mMissingTilesets);
Map::StaggerAxis mapStaggerAxis = mapDocument()->map()->staggerAxis();
// if staggered map, makes sure stamp stays the same
if (mapDocument()->map()->isStaggered()
&& ((mapStaggerAxis == Map::StaggerY) ? map->height() > 1 : map->width() > 1)) {
Map::StaggerIndex mapStaggerIndex = mapDocument()->map()->staggerIndex();
Map::StaggerIndex stampStaggerIndex = map->staggerIndex();
if (mapStaggerAxis == Map::StaggerY) {
bool topIsOdd = (p.y() - map->height() / 2) & 1;
if ((stampStaggerIndex == mapStaggerIndex) == topIsOdd) {
Map *shiftedMap = shiftedCopies.value(map);
if (!shiftedMap) {
shiftedMap = new Map(*map);
shiftedCopies.insert(map, shiftedMap);
LayerIterator it(shiftedMap, Layer::TileLayerType);
while (auto tileLayer = static_cast<TileLayer*>(it.next()))
shiftRows(tileLayer, stampStaggerIndex);
}
map = shiftedMap;
}
} else {
bool leftIsOdd = (p.x() - map->width() / 2) & 1;
if ((stampStaggerIndex == mapStaggerIndex) == leftIsOdd) {
Map *shiftedMap = shiftedCopies.value(map);
if (!shiftedMap) {
shiftedMap = new Map(*map);
shiftedCopies.insert(map, shiftedMap);
LayerIterator it(shiftedMap, Layer::TileLayerType);
while (auto tileLayer = static_cast<TileLayer*>(it.next()))
shiftColumns(tileLayer, stampStaggerIndex);
}
map = shiftedMap;
}
}
}
QRegion stampRegion;
if (regionCache.contains(map)) {
stampRegion = regionCache.value(map);
} else {
stampRegion = map->tileRegion();
regionCache.insert(map, stampRegion);
}
QPoint centered(p.x() - map->width() / 2,
p.y() - map->height() / 2);
const QRegion region = stampRegion.translated(centered.x(),
centered.y());
if (!paintedRegion.intersects(region)) {
paintedRegion += region;
PaintOperation op = { centered, map };
operations.append(op);
}
}
const QRect bounds = paintedRegion.boundingRect();
SharedMap preview = SharedMap::create(mapDocument()->map()->orientation(),
bounds.size(),
mapDocument()->map()->tileSize());
for (const PaintOperation &op : operations) {
LayerIterator layerIterator(op.stamp, Layer::TileLayerType);
while (auto tileLayer = static_cast<TileLayer*>(layerIterator.next())) {
TileLayer *target = findTileLayerByName(*preview, tileLayer->name());
if (!target) {
target = new TileLayer(tileLayer->name(), bounds.topLeft(), bounds.size());
preview->addLayer(target);
}
target->merge(op.pos - bounds.topLeft() + tileLayer->position(), tileLayer);
}
}
qDeleteAll(shiftedCopies);
preview->addTilesets(preview->usedTilesets());
mPreviewMap = preview;
}
}
