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Properly handle alt tiles of transparent images

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This commit is contained in:
Andreas Hocevar
2021-08-11 21:13:20 +02:00
parent efae01e71f
commit 4526f2ef34
4 changed files with 15 additions and 4 deletions
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4
src/ol/renderer/webgl/TileLayer.js
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@@ -293,6 +293,7 @@ class WebGLTileLayerRenderer extends WebGLLayerRenderer {
const uid = getUid(this);
const time = frameState.time;
let blend = false;
// look for cached tiles to use if a target tile is not ready
const tileTextures = tileTexturesByZ[z];
@@ -308,6 +309,7 @@ class WebGLTileLayerRenderer extends WebGLLayerRenderer {
tile.endTransition(uid);
continue;
}
blend = true;
const tileCoordKey = getTileCoordKey(tileCoord);
alphaLookup[tileCoordKey] = alpha;
}
@@ -340,7 +342,7 @@ class WebGLTileLayerRenderer extends WebGLLayerRenderer {
}
this.helper.useProgram(this.program_);
this.helper.prepareDraw(frameState);
this.helper.prepareDraw(frameState, !blend);
const zs = Object.keys(tileTexturesByZ)
.map(Number)