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| (Empty) |
| 1 <!DOCTYPE html> | |
| 2 JPEG image RGB pixels should render without color corruption and in strict<br> | |
| 3 order, regardless of the underlying machine pixel buffer endianess.<br><br> | |
| 4 | |
| 5 <img src="resources/rgb-jpeg-red.jpg" onload="test(this, [255,0,0,255])"> | |
| 6 <img src="resources/rgb-jpeg-green.jpg" onload="test(this, [0,255,0,255])"> | |
| 7 <img src="resources/rgb-jpeg-blue.jpg" onload="test(this, [0,0,255,255])"> | |
| 8 | |
| 9 <pre id="log">PASS</pre> | |
| 10 | |
| 11 <script> | |
| 12 if (window.testRunner) { | |
| 13 window.testRunner.waitUntilDone(); | |
| 14 window.testRunner.dumpAsText(); | |
| 15 } | |
| 16 | |
| 17 function log(message) | |
| 18 { | |
| 19 document.getElementById("log").textContent += '\n' + message; | |
| 20 } | |
| 21 | |
| 22 function averagePixelComponents(data, size) | |
| 23 { | |
| 24 var r = 0, g = 0, b = 0, a = 0; | |
| 25 for (var i = 0, total = size * 4; i < total; i += 4) { | |
| 26 r += data[i + 0]; | |
| 27 g += data[i + 1]; | |
| 28 b += data[i + 2]; | |
| 29 a += data[i + 3]; | |
| 30 } | |
| 31 | |
| 32 return [r / size, g / size, b / size, a / size]; | |
| 33 } | |
| 34 | |
| 35 function averagePixelShouldBe(pixel, expect, tolerance) | |
| 36 { | |
| 37 var delta = 0; | |
| 38 pixel.forEach(function(component, i) { | |
| 39 delta = Math.max(Math.abs(pixel[i] - expect[i]), delta); | |
| 40 }); | |
| 41 | |
| 42 if (delta > tolerance) | |
| 43 log('FAIL: [' + pixel + '] expected [' + expect + '] +/- ' + tolerance); | |
| 44 } | |
| 45 | |
| 46 function testImage(image, expect) | |
| 47 { | |
| 48 // Create a canvas, load the given image in it. | |
| 49 var canvas = document.createElement("canvas"); | |
| 50 canvas.width = canvas.height = 64; | |
| 51 var context = canvas.getContext("2d"); | |
| 52 context.drawImage(image, 0, 0); | |
| 53 | |
| 54 // Compare the canvas pixel component averages. | |
| 55 var pixels = context.getImageData(0, 0, 64, 64).data; | |
| 56 var result = averagePixelComponents(pixels, 64 * 64); | |
| 57 | |
| 58 var pixelTolerance = 3; | |
| 59 averagePixelShouldBe(result, expect, pixelTolerance); | |
| 60 } | |
| 61 | |
| 62 function test(image, expect) | |
| 63 { | |
| 64 try { | |
| 65 loadedImages = window.loadedImages || 0; | |
| 66 testImage(image, expect); | |
| 67 if (++loadedImages < 3) | |
| 68 return; | |
| 69 } catch (e) { | |
| 70 log('FAIL: ' + e.message); | |
| 71 } | |
| 72 | |
| 73 if (window.testRunner) | |
| 74 window.testRunner.notifyDone(); | |
| 75 } | |
| 76 </script> | |
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Chromium Code Reviews
Issue 2496663002:
Merge css3/image/ and fast/images/ to images/ (Closed)
