toDataURL.png.complexcolours.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/the-canvas-element/toDataURL.png.complexcolours.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->

<title>Canvas test: toDataURL.png.complexcolours</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/html/canvas/resources/canvas-tests.js"></script>

<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">

<body class="show_output">

<h1>toDataURL.png.complexcolours</h1>

<p class="desc">toDataURL with PNG handles non-primary and non-solid colours correctly</p>

<p class="output">Actual output:</p>

<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>

<p class="output expectedtext">Expected output:<p><img src="toDataURL.png.complexcolours.png" class="output expected" id="expected" alt="">

<ul id="d"></ul>

<script>

var t = async_test("toDataURL with PNG handles non-primary and non-solid colours correctly");

_addTest(function(canvas, ctx) {

// (These values are chosen to survive relatively alright through being premultiplied)

ctx.fillStyle = 'rgba(1, 3, 254, 1)';

ctx.fillRect(0, 0, 25, 25);

ctx.fillStyle = 'rgba(8, 252, 248, 0.75)';

ctx.fillRect(25, 0, 25, 25);

ctx.fillStyle = 'rgba(6, 10, 250, 0.502)';

ctx.fillRect(50, 0, 25, 25);

ctx.fillStyle = 'rgba(12, 16, 244, 0.25)';

ctx.fillRect(75, 0, 25, 25);

var img = new Image();

deferTest();

img.onload = t.step_func_done(function ()

    ctx.drawImage(img, 0, 25);

    // (The alpha values do not really survive float->int conversion, so just

    // do approximate comparisons)

    _assertPixel(canvas, 12,40, 1,3,254,255);

    _assertPixelApprox(canvas, 37,40, 8,252,248,191, 2);

    _assertPixelApprox(canvas, 62,40, 6,10,250,127, 4);

    _assertPixelApprox(canvas, 87,40, 12,16,244,63, 8);

});

img.src = canvas.toDataURL();

});

</script>