🐛 Fix image ArrayBuffer recovery

cds-astro · Jun 12, 2024 · 76df6f1 · 76df6f1
1 parent 2ddd6e0
commit 76df6f1
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/src/js/View.js b/src/js/View.js
@@ -457,7 +457,6 @@ export let View = (function () {
         }
 
         imgType = imgType || "image/png";
-        withLogo = withLogo || true;
 
         const canvas = this.wasm.canvas();
 
@@ -493,7 +492,18 @@ export let View = (function () {
      */
     View.prototype.getCanvasBuffer = async function (imgType, width, height, withLogo=true) {
         const c = await this.getCanvasContext(imgType, width, height, withLogo);
-        return c.getContext('2d').getImageData(0, 0, c.width, c.height).data.buffer;
+        return new Promise((resolve, reject) => {
+            c.toBlob(blob => {
+                if (blob) {
+                    const reader = new FileReader();
+                    reader.onloadend = () => resolve(reader.result);
+                    reader.onerror = () => reject(new Error('Error reading blob as ArrayBuffer'));
+                    reader.readAsArrayBuffer(blob);
+                } else {
+                    reject(new Error('Canvas toBlob failed'));
+                }
+            }, imgType);
+        });
     }
 
     View.prototype.selectLayer = function (layer) {