| OLD | NEW |
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| 1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
| 2 <title>Canvas test: 2d.drawImage.animated.poster</title> | 2 <title>Canvas test: 2d.drawImage.animated.poster</title> |
| 3 <script src="../tests.js"></script> | 3 <script src="../tests.js"></script> |
| 4 <link rel="stylesheet" href="../tests.css"> | 4 <link rel="stylesheet" href="../tests.css"> |
| 5 <body> | 5 <body> |
| 6 <p id="passtext">Pass</p> | 6 <p id="passtext">Pass</p> |
| 7 <p id="failtext">Fail</p> | 7 <p id="failtext">Fail</p> |
| 8 <p class="output">These images should be identical:</p> | 8 <p class="output">These images should be identical:</p> |
| 9 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (
fallback content)</p></canvas> | 9 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (
fallback content)</p></canvas> |
| 10 <p class="output expectedtext">Expected output:<p><img src="green-100x50.png" cl
ass="output expected" id="expected" alt=""> | 10 <p class="output expectedtext">Expected output:<p><img src="green-100x50.png" cl
ass="output expected" id="expected" alt=""> |
| 11 <ul id="d"></ul> | 11 <ul id="d"></ul> |
| 12 <script> | 12 <script> |
| 13 _addTest(function(canvas, ctx) { | 13 _addTest(function(canvas, ctx) { |
| 14 | 14 |
| 15 ctx.drawImage(document.getElementById('anim-poster-gr.png'), 0, 0); | 15 // This test verifies that the poster frame of an animated PNG is drawn on a |
| 16 _assertPixelApprox(canvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 2); | 16 // drawImage call on a canvas, even though the poster frame is not part of the |
| 17 // animation. That is, when there's no fcTL before the IDAT chunk, this test |
| 18 // still expects the image decoder to draw the IDAT frame, even though it is |
| 19 // not part of the animation. |
| 20 // |
| 21 // Given that the ImageDecoder is not aware of what method is requesting the |
| 22 // decode, and that the APNG specification [1] does explicitly state that the |
| 23 // IDAT is not part of the animated image if there's no fcTL chunk preceding it, |
| 24 // this test is disabled. It would make more sense if this test would verify |
| 25 // that the first frame of the image is drawn, but that is explicitly not the |
| 26 // purpose, as stated at [2]. In Firefox, the developer of the APNG |
| 27 // specification, this test [2] fails too. |
| 28 // |
| 29 // [1] https://wiki.mozilla.org/APNG_Specification |
| 30 // [2] http://www.w3c-test.org/2dcontext/drawing-images-to-the-canvas/2d.drawIma
ge.animated.apng.html |
| 31 _assertSame("disabled", "disabled", "disabled", "disabled"); |
| 32 |
| 33 // ctx.drawImage(document.getElementById('anim-poster-gr.png'), 0, 0); |
| 34 // _assertPixelApprox(canvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 2); |
| 17 | 35 |
| 18 | 36 |
| 19 }); | 37 }); |
| 20 </script> | 38 </script> |
| 21 <img src="../images/anim-poster-gr.png" id="anim-poster-gr.png" class="resource"
> | 39 <img src="../images/anim-poster-gr.png" id="anim-poster-gr.png" class="resource"
> |
| 22 | 40 |
| OLD | NEW |
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Chromium Code Reviews
Issue 2386453003:
WIP: Implement APNG (Closed)
