# HG changeset patch
# User Mads Kiilerich <madski@unity3d.com>
# Date 2015-02-19 00:00:40
# Node ID 2346f7b1b82a1b1ba98c9bd5635801a1f672a247
# Parent  a0443f20a5ecdc7ce29aee252f53fa67e8432625

graph: work around Firefox OS X limit of canvas size 32k when scaling

diff --git a/kallithea/public/js/graph.js b/kallithea/public/js/graph.js
--- a/kallithea/public/js/graph.js
+++ b/kallithea/public/js/graph.js
@@ -68,8 +68,9 @@ function BranchRenderer(canvas_id, conte
 		this.canvas.setAttribute('width',canvasWidth);
 		this.canvas.setAttribute('height',content.clientHeight);
 
-		// retina version needs to be scaled by 2x then halved via css
-		if (window.devicePixelRatio) {
+		// HiDPI version needs to be scaled by 2x then halved via css
+		// Note: Firefox on OS X fails scaling if the canvas height is more than 32k
+		if (window.devicePixelRatio && content.clientHeight * window.devicePixelRatio < 32768) {
 			this.canvas.setAttribute('width', canvasWidth * window.devicePixelRatio);
 			this.canvas.setAttribute('height', content.clientHeight * window.devicePixelRatio);
 			this.canvas.style.width = canvasWidth + "px";