JavaScriptCollection
diff --git a/‎build/html2canvas.js‎
Lines changed: 5 additions & 3 deletions b/‎build/html2canvas.js‎
Lines changed: 5 additions & 3 deletions
@@ -56,9 +56,11 @@ function renderDocument(document, options, windowWidth, windowHeight) {
 
 function crop(canvas, bounds) {
     var croppedCanvas = document.createElement("canvas");
-    croppedCanvas.width = bounds.width;
-    croppedCanvas.height = bounds.height;
-    croppedCanvas.getContext("2d").drawImage(canvas, bounds.left, bounds.top, bounds.width, bounds.height, 0, 0, bounds.width, bounds.height);
+    var width = croppedCanvas.width = Math.max(Math.min(0, bounds.left) + bounds.width, 1);
+    var height = croppedCanvas.height = Math.max(Math.min(0, bounds.top) + bounds.height, 1);
+    log("Cropping canvas at:", "left:", bounds.left, "top:", bounds.top, "width:", bounds.width, "height:", bounds.height);
+    log("Resulting crop with width", width, "and height", height);
+    croppedCanvas.getContext("2d").drawImage(canvas, Math.max(0, bounds.left), Math.max(0, bounds.top), width, height, 0, 0, width, height);
     return croppedCanvas;
 }