Chromium Code Reviews Chromium Code Reviews
Issue 211503006:
Implementation of 2D canvas context lost/restored events (Closed)
Base URL: svn://svn.chromium.org/blink/trunk| OLD | NEW |
|---|---|
| 1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> | 1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> |
| 2 <html> | 2 <html> |
| 3 <head> | 3 <head> |
| 4 <script src="../../resources/js-test.js"></script> | 4 <script src="../../resources/js-test.js"></script> |
| 5 </head> | 5 </head> |
| 6 <body> | 6 <body> |
| 7 <p id="description"></p> | |
| 8 <div id="console"></div> | |
| 9 <form method="get" action="?"> | |
| 10 <input type="hidden" name="hidden" value="I am hidden" /> | |
| 11 <input id="button" formmethod="post" type="submit" name="button" /> | |
| 12 </form> | |
| 13 <script> | 7 <script> |
| 14 description("Test for the formmethod attribute in input tags."); | 8 description("Tests to ensure correct behaviour of canvas loss and restoration wh en size is extremely large then, restored to a reasonable value."); |
| 9 | |
| 15 if (window.testRunner) { | 10 if (window.testRunner) { |
| 11 testRunner.dumpAsText(); | |
| 16 testRunner.waitUntilDone(); | 12 testRunner.waitUntilDone(); |
| 17 } | 13 } |
| 18 | 14 |
| 19 var button = document.getElementById('button'); | 15 var canvas = document.createElement('canvas') |
| 16 canvas.addEventListener('contextlost', contextLost); | |
| 17 canvas.addEventListener('contextrestored', contextRestored); | |
| 18 var ctx = canvas.getContext('2d'); | |
| 19 var lostEventHasFired = false; | |
| 20 verifyContextLost(false); | |
| 20 | 21 |
| 21 if (document.URL.substring(0, 4) == "file") { | 22 // WebIDL defines width and height as int. 2147483647 is int max. |
|
Stephen White
2014/03/25 23:25:04
Nit: but the test is googol-sized, not int max?
| |
| 22 if (document.URL.indexOf('?') == -1) { | 23 var googol = Math.pow(10,100); |
| 23 button.click(); | 24 canvas.width = googol; |
| 25 canvas.height = googol; | |
| 26 verifyContextLost(true); | |
| 27 canvas.width = googol; | |
| 28 verifyContextLost(true); | |
| 29 canvas.width = 100; | |
| 30 canvas.height = 100; | |
| 31 verifyContextLost(true); // Restoration is async. | |
| 32 | |
| 33 // Restore a sane dimension | |
| 34 | |
| 35 function verifyContextLost(shouldBeLost) { | |
| 36 // Verify context loss experimentally as well as isContextLost() | |
| 37 ctx.fillStyle = '#0f0'; | |
| 38 ctx.fillRect(0, 0, 1, 1); | |
| 39 contextLostTest = ctx.getImageData(0, 0, 1, 1).data[1] == 0; | |
| 40 if (shouldBeLost) { | |
| 41 shouldBeTrue('contextLostTest'); | |
| 42 shouldBeTrue('ctx.isContextLost()'); | |
| 24 } else { | 43 } else { |
| 25 if (document.URL.substring(document.URL.indexOf('?') + 1, document.URL.l ength) == "") | 44 shouldBeFalse('contextLostTest'); |
| 26 testPassed('The formmethod attribute was successfully used'); | 45 shouldBeFalse('ctx.isContextLost()'); |
| 27 else | 46 } |
| 28 testFailed('The formmethod attribute was not used'); | 47 } |
| 29 | 48 |
| 30 if (window.testRunner) | 49 function contextLost() { |
| 31 testRunner.notifyDone(); | 50 if (lostEventHasFired) { |
| 51 testFailed('Context lost event was dispatched more than once.'); | |
| 52 } else { | |
| 53 testPassed('Graphics context lost event dispatched.'); | |
| 54 } | |
| 55 lostEventHasFired = true; | |
| 56 verifyContextLost(true); | |
| 57 } | |
| 58 | |
| 59 function contextRestored() { | |
| 60 if (lostEventHasFired) { | |
| 61 testPassed('Context restored event dispatched after context lost.'); | |
| 62 } else { | |
| 63 testFailed('Context restored event was dispatched before a context lost event.'); | |
| 64 } | |
| 65 verifyContextLost(false); | |
| 66 » if (window.testRunner) { | |
| 67 » testRunner.notifyDone(); | |
| 32 } | 68 } |
| 33 } | 69 } |
| 34 </script> | 70 </script> |
| 35 </body> | 71 </body> |
| 36 </html> | 72 </html> |
| OLD | NEW |
