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Avoid unnecessary calculation in loops

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This commit is contained in:
Andreas Hocevar
2015-12-17 00:00:34 +01:00
parent 46a266fa5c
commit 80f10ce824
1 changed files with 5 additions and 5 deletions
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10
src/ol/renderer/canvas/canvasvectortilelayerrenderer.js
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@@ -88,6 +88,8 @@ ol.renderer.canvas.VectorTileLayer.prototype.composeFrame =
var projection = viewState.projection; var projection = viewState.projection;
var resolution = viewState.resolution; var resolution = viewState.resolution;
var rotation = viewState.rotation; var rotation = viewState.rotation;
var size = frameState.size;
var pixelScale = pixelRatio / resolution;
var layer = this.getLayer(); var layer = this.getLayer();
var source = layer.getSource(); var source = layer.getSource();
goog.asserts.assertInstanceof(source, ol.source.VectorTile, goog.asserts.assertInstanceof(source, ol.source.VectorTile,
@@ -116,9 +118,9 @@ ol.renderer.canvas.VectorTileLayer.prototype.composeFrame =
var tileGrid = source.getTileGrid(); var tileGrid = source.getTileGrid();
var currentZ, height, i, ii, insertPoint, insertTransform, offsetX, offsetY; var currentZ, height, i, ii, insertPoint, insertTransform, offsetX, offsetY;
var origin, pixelScale, pixelSpace, replayState, scale, size, tile; var origin, pixelSpace, replayState, scale, tile, tileCenter, tileContext;
var tileCenter, tileContext, tileExtent, tilePixelResolution, tilePixelSize; var tileExtent, tilePixelResolution, tilePixelSize, tileResolution, tileSize;
var tileResolution, tileSize, tileTransform, width; var tileTransform, width;
for (i = 0, ii = tilesToDraw.length; i < ii; ++i) { for (i = 0, ii = tilesToDraw.length; i < ii; ++i) {
tile = tilesToDraw[i]; tile = tilesToDraw[i];
replayState = tile.getReplayState(); replayState = tile.getReplayState();
@@ -127,10 +129,8 @@ ol.renderer.canvas.VectorTileLayer.prototype.composeFrame =
currentZ = tile.getTileCoord()[0]; currentZ = tile.getTileCoord()[0];
tileSize = ol.size.toSize(tileGrid.getTileSize(currentZ), this.tmpSize_); tileSize = ol.size.toSize(tileGrid.getTileSize(currentZ), this.tmpSize_);
pixelSpace = tile.getProjection().getUnits() == ol.proj.Units.TILE_PIXELS; pixelSpace = tile.getProjection().getUnits() == ol.proj.Units.TILE_PIXELS;
size = frameState.size;
tileResolution = tileGrid.getResolution(currentZ); tileResolution = tileGrid.getResolution(currentZ);
tilePixelResolution = tileResolution / source.getTilePixelRatio(); tilePixelResolution = tileResolution / source.getTilePixelRatio();
pixelScale = pixelRatio / resolution;
scale = tileResolution / resolution; scale = tileResolution / resolution;
offsetX = Math.round(pixelRatio * size[0] / 2); offsetX = Math.round(pixelRatio * size[0] / 2);
offsetY = Math.round(pixelRatio * size[1] / 2); offsetY = Math.round(pixelRatio * size[1] / 2);