shithub: puzzles

Download patch

ref: ff8a9fbc541b714e64fc089f75ec712a04cbd90f
parent: a7ddd6337517864d8ae44a20b8225046b6d6fdf3
author: Simon Tatham <anakin@pobox.com>
date: Sat Jun 21 13:40:29 EDT 2014

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]

--- a/emcclib.js

+++ b/emcclib.js

@@ -412,7 +412,7 @@

         // 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