ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Add a zDirection option for Zoomify

Browse Source 
Via zDirection, the renderer's selection of a tile source's resolution can be
controlled if the view's resolution does not match any tile source resolution.

Currently the zDirection option is only available for Zoomify. The comment
https://github.com/openlayers/openlayers/issues/9343#issuecomment-474341033
describes why caution is advised when using zDirection for other sources.

ol/source/Tile~TileSource#getZDirection has been added to avoid having the
getZDirection method solely in the Zoomify source - just to document the
possibility.
This commit is contained in:
Lutz Helm
2019-03-21 09:52:33 +01:00
parent c4279ff665
commit f5abb45de0
3 changed files with 31 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/ol/renderer/canvas/TileLayer.js
View File

@@ -143,7 +143,8 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
const tileSource = tileLayer.getSource();
const sourceRevision = tileSource.getRevision();
const tileGrid = tileSource.getTileGridForProjection(projection);
const z = tileGrid.getZForResolution(viewResolution, this.zDirection);
const zDirection = tileSource.getZDirection() === undefined ? this.zDirection : tileSource.getZDirection();
const z = tileGrid.getZForResolution(viewResolution, zDirection);
const tileResolution = tileGrid.getResolution(z);
let extent = frameState.extent;