From: Simon Tatham <anakin@pobox.com>
Date: Sat, 21 Jun 2014 17:40:29 +0000 (+0000)
Subject: Fix vertically misaligned text in Javascript puzzles.
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=ff8a9fbc541b714e64fc089f75ec712a04cbd90f;hp=a7ddd6337517864d8ae44a20b8225046b6d6fdf3;p=sgt-puzzles.git

Fix vertically misaligned text in Javascript puzzles.

When I constructed my test canvas to measure the vertical extent of a
text string for ALIGN_VCENTRE, I forgot to ensure that the 'width'
variable was an integer, as a result of which the loop over canvas
pixels kept trying to use fractional array indices and returning
undefined :-)

[originally from svn r10196]
---

diff --git a/emcclib.js b/emcclib.js
index 7d001c3..385281a 100644
--- a/emcclib.js
+++ b/emcclib.js
@@ -412,7 +412,7 @@ mergeInto(LibraryManager.library, {
         // Find the width of the string
         var ctx1 = onscreen_canvas.getContext('2d');
         ctx1.font = font;
-        var width = ctx1.measureText(midpoint_test_str).width;
+        var width = (ctx1.measureText(midpoint_test_str).width + 1) | 0;
 
         // Construct a test canvas of appropriate size, initialise it to
         // black, and draw the string on it in white