void TileGrid::setNeedsDisplayInRect(const IntRect& rect)
{
if (m_tiles.isEmpty())
return;
FloatRect scaledRect(rect);
scaledRect.scale(m_scale);
IntRect repaintRectInTileCoords(enclosingIntRect(scaledRect));
IntSize tileSize = m_controller.tileSize();
// For small invalidations, lookup the covered tiles.
if (repaintRectInTileCoords.height() < 2 * tileSize.height() && repaintRectInTileCoords.width() < 2 * tileSize.width()) {
TileIndex topLeft;
TileIndex bottomRight;
getTileIndexRangeForRect(repaintRectInTileCoords, topLeft, bottomRight);
for (int y = topLeft.y(); y <= bottomRight.y(); ++y) {
for (int x = topLeft.x(); x <= bottomRight.x(); ++x) {
TileIndex tileIndex(x, y);
TileMap::iterator it = m_tiles.find(tileIndex);
if (it != m_tiles.end())
setTileNeedsDisplayInRect(tileIndex, it->value, repaintRectInTileCoords, m_primaryTileCoverageRect);
}
}
return;
}
for (TileMap::iterator it = m_tiles.begin(), end = m_tiles.end(); it != end; ++it)
setTileNeedsDisplayInRect(it->key, it->value, repaintRectInTileCoords, m_primaryTileCoverageRect);
}
IntRect TileGrid::extent() const
{
TileIndex topLeft;
TileIndex bottomRight;
getTileIndexRangeForRect(m_primaryTileCoverageRect, topLeft, bottomRight);
// Return index of top, left tile and the number of tiles across and down.
return IntRect(topLeft.x(), topLeft.y(), bottomRight.x() - topLeft.x() + 1, bottomRight.y() - topLeft.y() + 1);
}
IntRect TileGrid::rectForTileIndex(const TileIndex& tileIndex) const
{
// FIXME: calculating the scaled size here should match with the rest of calculated sizes where we use the combination of
// enclosingIntRect, expandedIntSize (floor vs ceil).
// However enclosing this size could reveal gap on root layer's background. see RenderView::backgroundRect()
IntSize tileSize = m_controller.tileSize();
IntRect rect(tileIndex.x() * tileSize.width(), tileIndex.y() * tileSize.height(), tileSize.width(), tileSize.height());
IntRect scaledBounds(m_controller.bounds());
scaledBounds.scale(m_scale);
rect.intersect(scaledBounds);
return rect;
}
IntRect TileGrid::ensureTilesForRect(const FloatRect& rect, CoverageType newTileType)
{
if (m_controller.unparentsOffscreenTiles() && !m_controller.isInWindow())
return IntRect();
FloatRect scaledRect(rect);
scaledRect.scale(m_scale);
IntRect rectInTileCoords(enclosingIntRect(scaledRect));
TileIndex topLeft;
TileIndex bottomRight;
getTileIndexRangeForRect(rectInTileCoords, topLeft, bottomRight);
TileCohort currCohort = nextTileCohort();
unsigned tilesInCohort = 0;
IntRect coverageRect;
for (int y = topLeft.y(); y <= bottomRight.y(); ++y) {
for (int x = topLeft.x(); x <= bottomRight.x(); ++x) {
TileIndex tileIndex(x, y);
IntRect tileRect = rectForTileIndex(tileIndex);
TileInfo& tileInfo = m_tiles.add(tileIndex, TileInfo()).iterator->value;
coverageRect.unite(tileRect);
bool shouldChangeTileLayerFrame = false;
if (!tileInfo.layer) {
tileInfo.layer = m_controller.createTileLayer(tileRect, *this);
ASSERT(!m_tileRepaintCounts.contains(tileInfo.layer.get()));
} else {
// We already have a layer for this tile. Ensure that its size is correct.
FloatSize tileLayerSize(tileInfo.layer->bounds().size());
shouldChangeTileLayerFrame = tileLayerSize != FloatSize(tileRect.size());
if (shouldChangeTileLayerFrame) {
tileInfo.layer->setBounds(FloatRect(FloatPoint(), tileRect.size()));
tileInfo.layer->setPosition(tileRect.location());
tileInfo.layer->setNeedsDisplay();
}
}
if (newTileType == CoverageType::SecondaryTiles && !tileRect.intersects(m_primaryTileCoverageRect)) {
tileInfo.cohort = currCohort;
++tilesInCohort;
}
bool shouldParentTileLayer = (!m_controller.unparentsOffscreenTiles() || m_controller.isInWindow()) && !tileInfo.layer->superlayer();
if (shouldParentTileLayer)
m_containerLayer.get().appendSublayer(*tileInfo.layer);
}
}
if (tilesInCohort)
startedNewCohort(currCohort);
return coverageRect;
}
void TileGrid::revalidateTiles(TileValidationPolicy validationPolicy)
{
FloatRect coverageRect = m_controller.coverageRect();
IntRect bounds = m_controller.bounds();
if (coverageRect.isEmpty() || bounds.isEmpty())
return;
FloatRect scaledRect(coverageRect);
scaledRect.scale(m_scale);
IntRect coverageRectInTileCoords(enclosingIntRect(scaledRect));
TileCohort currCohort = nextTileCohort();
unsigned tilesInCohort = 0;
double minimumRevalidationTimerDuration = std::numeric_limits<double>::max();
bool needsTileRevalidation = false;
// Move tiles newly outside the coverage rect into the cohort map.
for (TileMap::iterator it = m_tiles.begin(), end = m_tiles.end(); it != end; ++it) {
TileInfo& tileInfo = it->value;
TileIndex tileIndex = it->key;
PlatformCALayer* tileLayer = tileInfo.layer.get();
IntRect tileRect = rectForTileIndex(tileIndex);
if (tileRect.intersects(coverageRectInTileCoords)) {
tileInfo.cohort = VisibleTileCohort;
if (tileInfo.hasStaleContent) {
// FIXME: store a dirty region per layer?
tileLayer->setNeedsDisplay();
tileInfo.hasStaleContent = false;
}
} else {
// Add to the currentCohort if not already in one.
if (tileInfo.cohort == VisibleTileCohort) {
tileInfo.cohort = currCohort;
++tilesInCohort;
if (m_controller.unparentsOffscreenTiles())
tileLayer->removeFromSuperlayer();
} else if (m_controller.unparentsOffscreenTiles() && m_controller.shouldAggressivelyRetainTiles() && tileLayer->superlayer()) {
// Aggressive tile retention means we'll never remove cohorts, but we need to make sure they're unparented.
// We can't immediately unparent cohorts comprised of secondary tiles that never touch the primary coverage rect,
// because that would defeat the usefulness of prepopulateRect(); instead, age prepopulated tiles out as if they were being removed.
for (auto& cohort : m_cohortList) {
if (cohort.cohort != tileInfo.cohort)
continue;
double timeUntilCohortExpires = cohort.timeUntilExpiration();
if (timeUntilCohortExpires > 0) {
minimumRevalidationTimerDuration = std::min(minimumRevalidationTimerDuration, timeUntilCohortExpires);
needsTileRevalidation = true;
} else
tileLayer->removeFromSuperlayer();
break;
}
}
}
}
if (needsTileRevalidation)
m_controller.scheduleTileRevalidation(minimumRevalidationTimerDuration);
if (tilesInCohort)
startedNewCohort(currCohort);
if (!m_controller.shouldAggressivelyRetainTiles()) {
if (m_controller.shouldTemporarilyRetainTileCohorts())
scheduleCohortRemoval();
else if (tilesInCohort)
removeTilesInCohort(currCohort);
}
// Ensure primary tile coverage tiles.
m_primaryTileCoverageRect = ensureTilesForRect(coverageRect, CoverageType::PrimaryTiles);
if (validationPolicy & PruneSecondaryTiles) {
removeAllSecondaryTiles();
m_cohortList.clear();
} else {
for (auto& secondaryCoverageRect : m_secondaryTileCoverageRects) {
FloatRect secondaryRectInLayerCoordinates(secondaryCoverageRect);
secondaryRectInLayerCoordinates.scale(1 / m_scale);
ensureTilesForRect(secondaryRectInLayerCoordinates, CoverageType::SecondaryTiles);
}
m_secondaryTileCoverageRects.clear();
}
if (m_controller.unparentsOffscreenTiles() && (validationPolicy & UnparentAllTiles)) {
for (TileMap::iterator it = m_tiles.begin(), end = m_tiles.end(); it != end; ++it)
it->value.layer->removeFromSuperlayer();
}
auto boundsAtLastRevalidate = m_controller.boundsAtLastRevalidate();
if (boundsAtLastRevalidate != bounds) {
// If there are margin tiles and the bounds have grown taller or wider, then the tiles that used to
// be bottom or right margin tiles need to be invalidated.
if (m_controller.hasMargins()) {
if (bounds.width() > boundsAtLastRevalidate.width() || bounds.height() > boundsAtLastRevalidate.height()) {
IntRect boundsWithoutMargin = m_controller.boundsWithoutMargin();
IntRect oldBoundsWithoutMargin = m_controller.boundsAtLastRevalidateWithoutMargin();
if (bounds.height() > boundsAtLastRevalidate.height()) {
IntRect formerBottomMarginRect = IntRect(oldBoundsWithoutMargin.x(), oldBoundsWithoutMargin.height(),
oldBoundsWithoutMargin.width(), boundsWithoutMargin.height() - oldBoundsWithoutMargin.height());
setNeedsDisplayInRect(formerBottomMarginRect);
}
if (bounds.width() > boundsAtLastRevalidate.width()) {
IntRect formerRightMarginRect = IntRect(oldBoundsWithoutMargin.width(), oldBoundsWithoutMargin.y(),
boundsWithoutMargin.width() - oldBoundsWithoutMargin.width(), oldBoundsWithoutMargin.height());
setNeedsDisplayInRect(formerRightMarginRect);
}
}
}
FloatRect scaledBounds(bounds);
scaledBounds.scale(m_scale);
IntRect boundsInTileCoords(enclosingIntRect(scaledBounds));
TileIndex topLeftForBounds;
TileIndex bottomRightForBounds;
getTileIndexRangeForRect(boundsInTileCoords, topLeftForBounds, bottomRightForBounds);
Vector<TileIndex> tilesToRemove;
for (auto& index : m_tiles.keys()) {
if (index.y() < topLeftForBounds.y() || index.y() > bottomRightForBounds.y() || index.x() < topLeftForBounds.x() || index.x() > bottomRightForBounds.x())
tilesToRemove.append(index);
}
removeTiles(tilesToRemove);
}
m_controller.didRevalidateTiles();
}
