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Merge pull request #338 from twpayne/snap-center-to-pixel2

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Snap center to pixel
This commit is contained in:
Tom Payne
2013-03-11 08:41:28 -07:00
parent 837aa7512b 505c607ccb
commit 8b5194da38
7 changed files with 140 additions and 33 deletions
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21
src/ol/renderer/dom/domtilelayerrenderer.js
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@@ -90,8 +90,17 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
}
var z = tileGrid.getZForResolution(view2DState.resolution);
var tileResolution = tileGrid.getResolution(z);
var center = view2DState.center;
var extent;
if (tileResolution == view2DState.resolution) {
center = this.snapCenterToPixel(center, tileResolution, frameState.size);
extent = ol.Extent.getForView2DAndSize(
center, tileResolution, view2DState.rotation, frameState.size);
} else {
extent = frameState.extent;
}
var tileRange = tileGrid.getTileRangeForExtentAndResolution(
frameState.extent, tileResolution);
extent, tileResolution);
/** @type {Object.<number, Object.<string, ol.Tile>>} */
var tilesToDrawByZ = {};
@@ -146,7 +155,7 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
tileLayerZ = this.tileLayerZs_[tileLayerZKey];
} else {
tileCoordOrigin =
tileGrid.getTileCoordForCoordAndZ(view2DState.center, tileLayerZKey);
tileGrid.getTileCoordForCoordAndZ(center, tileLayerZKey);
tileLayerZ = new ol.renderer.dom.TileLayerZ_(tileGrid, tileCoordOrigin);
newTileLayerZKeys[tileLayerZKey] = true;
this.tileLayerZs_[tileLayerZKey] = tileLayerZ;
@@ -183,8 +192,8 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
resolution / view2DState.resolution, 1);
goog.vec.Mat4.translate(
transform,
(origin.x - view2DState.center.x) / resolution,
(view2DState.center.y - origin.y) / resolution,
(origin.x - center.x) / resolution,
(center.y - origin.y) / resolution,
0);
tileLayerZ.setTransform(transform);
if (tileLayerZKey in newTileLayerZKeys) {
@@ -201,7 +210,7 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
} else {
if (!frameState.viewHints[ol.ViewHint.ANIMATING] &&
!frameState.viewHints[ol.ViewHint.INTERACTING]) {
tileLayerZ.removeTilesOutsideExtent(frameState.extent);
tileLayerZ.removeTilesOutsideExtent(extent);
}
}
}
@@ -217,7 +226,7 @@ ol.renderer.dom.TileLayer.prototype.renderFrame =
}
this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);
tileSource.useLowResolutionTiles(z, frameState.extent, tileGrid);
tileSource.useLowResolutionTiles(z, extent, tileGrid);
this.scheduleExpireCache(frameState, tileSource);
};