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Merge pull request #9533 from fredj/canvas_optim

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Canvas optimizations
This commit is contained in:
Frédéric Junod
2019-05-15 08:24:57 +02:00
committed by GitHub
parent 72551ab506 98ee52c61c
commit 2de282ae49
1 changed files with 9 additions and 7 deletions
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16
src/ol/renderer/canvas/VectorTileLayer.js
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@@ -619,17 +619,19 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
const size = source.getTilePixelSize(z, pixelRatio, projection);
context.canvas.width = size[0];
context.canvas.height = size[1];
const canvasTransform = resetTransform(this.tmpTransform_);
const renderScale = pixelRatio / renderPixelRatio;
scaleTransform(canvasTransform, renderScale, renderScale);
context.setTransform.apply(context, canvasTransform);
if (renderScale !== 1) {
const canvasTransform = resetTransform(this.tmpTransform_);
scaleTransform(canvasTransform, renderScale, renderScale);
context.setTransform.apply(context, canvasTransform);
}
const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
const pixelScale = renderPixelRatio / resolution;
const transform = resetTransform(this.tmpTransform_);
scaleTransform(transform, pixelScale, -pixelScale);
translateTransform(transform, -tileExtent[0], -tileExtent[3]);
for (let i = 0, ii = executorGroups.length; i < ii; ++i) {
const executorGroup = executorGroups[i];
const pixelScale = renderPixelRatio / resolution;
const transform = resetTransform(this.tmpTransform_);
scaleTransform(transform, pixelScale, -pixelScale);
translateTransform(transform, -tileExtent[0], -tileExtent[3]);
executorGroup.execute(context, transform, 0, {}, true, IMAGE_REPLAYS[layer.getRenderMode()]);
}
replayState.renderedTileResolution = tile.wantedResolution;