tei/MapLibreParticleLab
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[core] don't break ascent in the overscaled tile phase

Browse Source 
We optimize our updateRenderable algorithm by breaking ascent when we've already checked a certain tile. So far, we've compared the UnwrappedTileIDs, but they don't include the overscale component. When ascending through overscaled tile IDs, we've stopped the ascent too early, when we should've kept the search going.
This commit is contained in:
Konstantin Käfer
2018-09-20 12:07:02 +02:00
parent f49a9ca1de
commit 2ea0833ecf
2 changed files with 54 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/mbgl/algorithm/update_renderables.hpp
View File

@@ -21,7 +21,7 @@ void updateRenderables(GetTileFn getTile,
const IdealTileIDs& idealTileIDs,
const Range<uint8_t>& zoomRange,
const uint8_t dataTileZoom) {
std::unordered_set<UnwrappedTileID> checked;
std::unordered_set<OverscaledTileID> checked;
bool covered;
int32_t overscaledZ;
@@ -85,14 +85,13 @@ void updateRenderables(GetTileFn getTile,
// We couldn't find child tiles that entirely cover the ideal tile.
for (overscaledZ = dataTileZoom - 1; overscaledZ >= zoomRange.min; --overscaledZ) {
const auto parentDataTileID = idealDataTileID.scaledTo(overscaledZ);
const auto parentRenderTileID = parentDataTileID.toUnwrapped();
if (checked.find(parentRenderTileID) != checked.end()) {
if (checked.find(parentDataTileID) != checked.end()) {
// Break parent tile ascent, this route has been checked by another child
// tile before.
break;
} else {
checked.emplace(parentRenderTileID);
checked.emplace(parentDataTileID);
}
tile = getTile(parentDataTileID);
@@ -117,7 +116,7 @@ void updateRenderables(GetTileFn getTile,
parentIsLoaded = tile->isLoaded();
if (tile->isRenderable()) {
renderTile(parentRenderTileID, *tile);
renderTile(parentDataTileID.toUnwrapped(), *tile);
// Break parent tile ascent, since we found one.
break;
}