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Reuse target for image layers

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This commit is contained in:
ahocevar
2019-05-19 22:31:49 +02:00
parent a55505b36a
commit d1f1b468b1
4 changed files with 9 additions and 6 deletions
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5
src/ol/renderer/canvas/TileLayer.js
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@@ -309,8 +309,9 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
const y = Math.round(floatY);
const w = nextX - x;
const h = nextY - y;
const transition = z === currentZ;
if (clips) {
if (clips && (!transition || tile.getAlpha(getUid(this), frameState.time) === 1)) {
// Clip mask for regions in this tile that already filled by a higher z tile
context.save();
currentClip = [x, y, x + w, y, x + w, y + h, x, y + h];
@@ -334,7 +335,7 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
clips.push(currentClip);
clipZs.push(currentZ);
}
this.drawTileImage(tile, frameState, x, y, w, h, tileGutter, z === currentZ);
this.drawTileImage(tile, frameState, x, y, w, h, tileGutter, transition);
if (clips) {
context.restore();
}