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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/canvas/test/test_toDataURL_alpha.html
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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+<!DOCTYPE html>
+<html>
+<head>
+<title>Canvas test: toDataURL parameters (Bug 564388)</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css">
+</head>
+<body>
+<p>
+For image types that do not support an alpha channel, the image must be
+composited onto a solid black background using the source-over operator,
+and the resulting image must be the one used to create the data: URL.
+</p>
+<p> See:
+<a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-canvas-todataurl">
+http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-canvas-todataurl
+</a>
+</p>
+<p>Mozilla
+ <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=650720">Bug 650720</a>
+</p>
+<p class="output">Output:</p>
+<!--
+ Author's note:
+ To add more cases to this test:
+ - To add a row (another color value)
+ * Add a row to the table below, using the canvas id format
+ (c<row>-<col>)
+ * Update runTests to include the new row in the loop
+ - To add a column (another image format)
+ * Add a column to the table below, using the canvas id format above
+ * Update runTests to call do_canvas, passing your column number,
+ the image format, and any options to pass to the toDataUrl function
+
+ Vaguely derived from Philip Taylor's toDataURL.jpeg.alpha test:
+ http://philip.html5.org/tests/canvas/suite/tests/toDataURL.jpeg.alpha.html
+-->
+<table>
+ <tr>
+ <th>Type:</th>
+ <th>image/png</th>
+ <th>image/jpeg</th>
+ <th>image/bmp<br />(24 bpp)</th>
+ <th>image/bmp<br />(32 bpp)</th>
+ </tr>
+ <tr>
+ <td id="c1">rgba(128, 255, 128, 0.5)</td>
+ <td><canvas id="c1-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c1-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c1-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c1-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c2">rgba(255, 128, 128, 0.75)</td>
+ <td><canvas id="c2-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c2-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c2-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c2-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c3">rgba(128, 128, 255, 0.25)</td>
+ <td><canvas id="c3-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c3-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c3-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c3-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c4">rgba(255, 255, 255, 1.0)</td>
+ <td><canvas id="c4-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c4-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c4-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c4-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c5">rgba(255, 255, 255, 0)</td>
+ <td><canvas id="c5-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c5-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c5-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c5-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c6">rgba(0, 0, 0, 1.0)</td>
+ <td><canvas id="c6-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c6-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c6-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c6-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+ <tr>
+ <td id="c7">rgba(0, 0, 0, 0)</td>
+ <td><canvas id="c7-1" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c7-2" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c7-3" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ <td><canvas id="c7-4" class="output" width="100" height="50">
+ <p class="fallback">FAIL (fallback content)</p></canvas></td>
+ </tr>
+</table>
+
+<script>
+var finishedTests = [];
+
+function isPixel(ctx, x,y, r,g,b,a, d)
+{
+ var pos = x + "," + y;
+ var colour = r + "," + g + "," + b + "," + a;
+ var pixel = ctx.getImageData(x, y, 1, 1);
+ var pr = pixel.data[0],
+ pg = pixel.data[1],
+ pb = pixel.data[2],
+ pa = pixel.data[3];
+ ok(r-d <= pr && pr <= r+d &&
+ g-d <= pg && pg <= g+d &&
+ b-d <= pb && pb <= b+d &&
+ a-d <= pa && pa <= a+d,
+ "pixel "+pos+" of "+ctx.canvas.id+" is "+pr+","+pg+","+pb+","+pa+
+ "; expected "+colour+" +/- "+d);
+}
+
+
+function do_canvas(row, col, type, options)
+{
+ finishedTests[row + '_' + col] = false;
+ var canvas = document.getElementById('c' + row + '-' + col);
+ var ctx = canvas.getContext('2d');
+
+ ctx.fillStyle = document.getElementById('c' + row).textContent;
+ ctx.fillRect(0, 0, 100, 50);
+ var data = canvas.toDataURL(type, options);
+
+ ctx.fillStyle = '#000';
+ ctx.fillRect(0, 0, 100, 50);
+ var img = new Image();
+
+ var color = document.getElementById('c' + row).textContent;
+ color = color.substr(5, color.length - 6); // strip off the 'argb()'
+ var colors = color.replace(/ /g, '').split(',');
+ var r = colors[0]*colors[3],
+ g = colors[1]*colors[3],
+ b = colors[2]*colors[3];
+
+ img.onload = function ()
+ {
+ ctx.drawImage(img, 0, 0);
+ isPixel(ctx, 50,25, r,g,b,255, 8);
+ finishedTests[row + '_' + col] = true;
+ };
+ img.src = data;
+}
+
+function checkFinished()
+{
+ for (var t in finishedTests) {
+ if (!finishedTests[t]) {
+ setTimeout(checkFinished, 500);
+ return;
+ }
+ }
+ SimpleTest.finish();
+}
+
+function runTests()
+{
+ for (var row = 1; row <= 7; row++) {
+ do_canvas(row, 1, 'image/png');
+ do_canvas(row, 2, 'image/jpeg');
+ do_canvas(row, 3, 'image/bmp');
+ do_canvas(row, 4, 'image/bmp', '-moz-parse-options:bpp=32');
+ }
+
+ setTimeout(checkFinished, 500);
+}
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+
+addLoadEvent(runTests);
+
+</script>
+
+</html>
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