Streamline node & web flip

src/jscanify.js

@@ -20,7 +20,7 @@
   }
 
   class jscanify {
-    constructor() { }
+    constructor() {}
 
     /**
      * Finds the contour of the paper within the image
@@ -184,26 +184,15 @@
       );
 
       cv.imshow(canvas, warpedDst);
+      const canvasContext = canvas.getContext("2d");
+      canvasContext.save()
+      canvasContext.scale(1, -1)
+      canvasContext.drawImage(canvas, 0, -resultHeight)
+      canvasContext.restore()
 
-      const newImg = document.createElement("img");
-      newImg.src = canvas.toDataURL();
-      newImg.onload = function () {
-        // flip unwarped image
-
-        let ctx = canvas.getContext("2d");
-        ctx.clearRect(0, 0, canvas.width, canvas.height);
-        canvas.width = resultWidth;
-        canvas.height = resultHeight;
-        ctx.setTransform(1, 0, 0, -1, 0, canvas.height);
-
-        ctx.drawImage(newImg, 0, 0);
-
-        ctx.setTransform(1, 0, 0, 1, 0, 0);
-
-        img.delete();
-        warpedDst.delete();
-        onComplete(canvas);
-      };
+      img.delete()
+      warpedDst.delete()
+      onComplete(canvas)
     }
 
     /**
@@ -264,7 +253,6 @@
         bottomRightCorner,
       };
     }
-
   }
 
   return jscanify;