nakarte

commit 3deb5ec0dd4879c5cdc5a22bd16d48f6b075d4c1
parent cb70701df58dabb0d952cea339033350964da416
Author: Sergej Orlov <wladimirych@gmail.com>
Date:   Sat,  1 Apr 2017 20:12:22 +0300

[print] try to use less memory by destroying unneeded canvas and array

Diffstat:
M
src/lib/leaflet.control.printPages/map-render.js
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/lib/leaflet.control.printPages/map-render.js b/src/lib/leaflet.control.printPages/map-render.js
@@ -63,7 +63,9 @@ function blendMultiplyCanvas(src, dest) {
         throw new Error('Canvas size mismatch');
     }
     var s_data = src.getContext('2d').getImageData(0, 0, src.width, src.height).data;
-    var d_image_data = dest.getContext('2d').getImageData(0, 0, src.width, src.height);
+    src.width = 0;
+    src.height = 0;
+    var d_image_data = dest.getContext('2d').getImageData(0, 0, dest.width, dest.height);
     var d_data = d_image_data.data;
     var data_length = s_data.length,
         sr, sg, sb, sa, sa1,
@@ -91,6 +93,7 @@ function blendMultiplyCanvas(src, dest) {
             d_data[i + 2] = db;
         }
     }
+    s_data = null;
     dest.getContext('2d').putImageData(d_image_data, 0, 0);
 }
 
@@ -133,7 +136,6 @@ class PageComposer {
         }
     }
 
-
     setupCurrentCanvas(zoom) {
         let size;
         if (zoom === 'overlay' || zoom === 'solidOverlay') {