fix tileSize when drawing tile

Author: fuzhenn

src/renderer/layer/tilelayer/TileLayerCanvasRenderer.js

@@ -450,7 +450,6 @@ class TileLayerCanvasRenderer extends CanvasRenderer {
             tileZoom = tileInfo.z,
             tileId = tileInfo.id;
         const map = this.getMap(),
-            tileSize = this.layer.getTileSize(tileInfo.layer),
             zoom = map.getZoom(),
             ctx = this.context,
             cp = map._pointToContainerPoint(point, tileZoom, 0, TEMP_POINT),
@@ -467,7 +466,8 @@ class TileLayerCanvasRenderer extends CanvasRenderer {
         }
         let x = cp.x,
             y = cp.y;
-        let w = tileSize.width, h = tileSize.height;
+        let w = tileInfo.extent2d.xmax - tileInfo.extent2d.xmin;
+        let h = tileInfo.extent2d.ymax - tileInfo.extent2d.ymin;
         if (transformed) {
             ctx.save();
             ctx.translate(x, y);

src/renderer/layer/tilelayer/TileLayerGLRenderer.js

@@ -36,9 +36,8 @@ class TileLayerGLRenderer extends ImageGLRenderable(TileLayerCanvasRenderer) {
         }
 
         const scale = tileInfo._glScale = tileInfo._glScale || map.getGLScale(tileInfo.z);
-        const size = this.layer.getTileSize(tileInfo.layer);
-        const w = size.width;
-        const h = size.height;
+        const w = tileInfo.extent2d.xmax - tileInfo.extent2d.xmin;
+        const h = tileInfo.extent2d.ymax - tileInfo.extent2d.ymin;
         if (tileInfo.cache !== false) {
             this._bindGLBuffer(tileImage, w, h);
         }
@@ -173,4 +172,3 @@ TileLayer.registerRenderer('gl', TileLayerGLRenderer);
 
 export default TileLayerGLRenderer;
 
-