layout/reftests/canvas/ctm-singular-sanity.html@ac0c01689b40 (annotated)
layout/reftests/canvas/ctm-singular-sanity.html
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | <html> |
| michael@0 | 2 | <head> |
| michael@0 | 3 | <script type="text/javascript"> |
| michael@0 | 4 | |
| michael@0 | 5 | function assert(cond, msg) { if (!cond) { throw msg; } } |
| michael@0 | 6 | |
| michael@0 | 7 | function isSameTM(m1, m2) { |
| michael@0 | 8 | // XXX this is probably the ugliest possible way to write this function, |
| michael@0 | 9 | // but it's intended to be lowest-common-denominator |
| michael@0 | 10 | if (!(m1.length === 6 && m1.length === m2.length)) { |
| michael@0 | 11 | return false; |
| michael@0 | 12 | } |
| michael@0 | 13 | for (var i = 0; i < m1.length; ++i) { |
| michael@0 | 14 | if (m1[i] !== m2[i]) { |
| michael@0 | 15 | return false; |
| michael@0 | 16 | } |
| michael@0 | 17 | } |
| michael@0 | 18 | return true; |
| michael@0 | 19 | } |
| michael@0 | 20 | |
| michael@0 | 21 | window.onload = function() { |
| michael@0 | 22 | var IM = [ 1, 0, 0, 1, 0, 0 ]; |
| michael@0 | 23 | |
| michael@0 | 24 | try { |
| michael@0 | 25 | var ctx = document.getElementById("c1").getContext("2d"); |
| michael@0 | 26 | |
| michael@0 | 27 | var singular = [ 0, 0, 0, 0, 0, 0 ]; |
| michael@0 | 28 | ctx.mozCurrentTransform = singular; |
| michael@0 | 29 | assert(isSameTM(singular, ctx.mozCurrentTransform), |
| michael@0 | 30 | "Expected setting CTM to a singular matrix to work"); |
| michael@0 | 31 | var inv = ctx.mozCurrentTransformInverse; |
| michael@0 | 32 | assert(!isSameTM(inv, inv), |
| michael@0 | 33 | "Expected to get back matrix of NaN's from currentTransformInverse"); |
| michael@0 | 34 | ctx.mozCurrentTransform = IM; |
| michael@0 | 35 | |
| michael@0 | 36 | var m = [ 1, 2, 3, 4, 5, 6 ]; |
| michael@0 | 37 | ctx.mozCurrentTransform = m; |
| michael@0 | 38 | ctx.mozCurrentTransformInverse = singular; |
| michael@0 | 39 | assert(isSameTM(m, ctx.mozCurrentTransform), |
| michael@0 | 40 | "Setting currentTransformInverse to a singular matrix is a no-op"); |
| michael@0 | 41 | ctx.mozCurrentTransform = IM; |
| michael@0 | 42 | } catch (e) { |
| michael@0 | 43 | document.body.innerHTML = "FAIL: "+ e.toString(); |
| michael@0 | 44 | return; |
| michael@0 | 45 | } |
| michael@0 | 46 | document.body.innerHTML = "Pass"; |
| michael@0 | 47 | } |
| michael@0 | 48 | </script> |
| michael@0 | 49 | </head> |
| michael@0 | 50 | <body> |
| michael@0 | 51 | <div><canvas id="c1" width="300" height="300"></canvas></div> |
| michael@0 | 52 | </body> |
| michael@0 | 53 | </html> |
