P5-2895 - Fix and sanitize cropping numbers

2018-06-19 14:44:01 +02:00
parent 37481d2fcd
commit 1e4a05bffa
3 changed files with 24 additions and 8 deletions
@@ -21,9 +21,17 @@ function ImageDataHandler(img) {

        var dragAxis = img.canvas.getViewport().getData().axis;

+        var leftDiff = viewportBounds.left - img.left;
+        var topDiff = viewportBounds.top - img.top;
+
+        // Robustness measure to handle the extreme precision of shape positioning in canvas.
+        var countAsZeroLimit = 1e-5;
+        leftDiff = Math.abs(leftDiff) < countAsZeroLimit ? 0 : leftDiff;
+        topDiff = Math.abs(topDiff) < countAsZeroLimit ? 0 : topDiff;
+
        _cropData = {
-            x: dragAxis === 'x' ? (viewportBounds.left - img.left) / (img.width * img.scaleX) : 0,
-            y: dragAxis === 'y' ? (viewportBounds.top - img.top) / (img.height * img.scaleY) : 0,
+            x: dragAxis === 'x' ? (leftDiff) / (img.width * img.scaleX) : 0,
+            y: dragAxis === 'y' ? (topDiff) / (img.height * img.scaleY) : 0,
            viewportWidth: viewportBounds.width,
            viewportHeight: viewportBounds.height,
        };