63 lines
2.7 KiB
HTML
63 lines
2.7 KiB
HTML
<!DOCTYPE HTML>
|
|
<title>Canvas test: toDataURL parameters (Bug 564388)</title>
|
|
<script src="/tests/SimpleTest/SimpleTest.js"></script>
|
|
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
|
|
<body>
|
|
<p>
|
|
This test covers the JPEG and webp quality parameter. If (when) the HTML5 spec changes the
|
|
allowed parameters for ToDataURL, new tests should go here.
|
|
</p>
|
|
<canvas id="c" width="100" height="100"><p class="fallback">FAIL (fallback content)</p></canvas>
|
|
<script>
|
|
let canvas = document.getElementById('c');
|
|
let ctx = canvas.getContext("2d");
|
|
|
|
ctx.strokeStyle = '#FF0000';
|
|
ctx.fillStyle = '#00FF00';
|
|
ctx.fillRect(0, 0, 100, 100);
|
|
ctx.beginPath();
|
|
ctx.moveTo(10, 10);
|
|
ctx.lineTo(90, 90);
|
|
ctx.stroke();
|
|
|
|
let pngData = canvas.toDataURL('image/png');
|
|
let pngQuality = canvas.toDataURL('image/png', 0.1);
|
|
is(pngQuality, pngData, "Quality is not supported for PNG images");
|
|
|
|
function checkType(imagetype) {
|
|
let imageTypeString = 'image/' + imagetype;
|
|
let imageTypeUpperString = 'IMAGE/' + imagetype.toUpperCase();
|
|
let data = canvas.toDataURL(imageTypeString);
|
|
if (data.match(new RegExp('^data:image\/' + imagetype + '[;,]'))) {
|
|
// Test the JPEG/wepb quality parameter
|
|
|
|
let fullQuality = canvas.toDataURL(imageTypeString, 1.0);
|
|
let lowQuality = canvas.toDataURL(imageTypeString, 0.1);
|
|
isnot(lowQuality, fullQuality, "A low quality (0.1) should differ from high quality (1.0) " + imageTypeString);
|
|
|
|
let medQuality = canvas.toDataURL(imageTypeString, 0.5);
|
|
isnot(medQuality, fullQuality, "A medium quality (0.5) should differ from high (1.0) " + imageTypeString);
|
|
isnot(medQuality, lowQuality, "A medium quality (0.5) should differ from low (0.5) " + imageTypeString);
|
|
|
|
let tooHigh = canvas.toDataURL(imageTypeString, 2.0);
|
|
is(tooHigh, data, "Quality above 1.0 is treated as unspecified " + imageTypeString);
|
|
|
|
let tooLow = canvas.toDataURL(imageTypeString, -1.0);
|
|
is(tooLow, data, "Quality below 0.0 is treated as unspecified " + imageTypeString);
|
|
|
|
let lowQualityExtra = canvas.toDataURL(imageTypeString, 0.1, 'foo', 'bar', null);
|
|
is(lowQualityExtra, lowQuality, "Quality applies even if extra arguments are present " + imageTypeString);
|
|
|
|
let lowQualityUppercase = canvas.toDataURL(imageTypeUpperString, 0.1);
|
|
is(lowQualityUppercase, lowQuality, "Quality applies to " + imageTypeString + " regardless of case");
|
|
|
|
let lowQualityString = canvas.toDataURL(imageTypeString, '0.1');
|
|
isnot(lowQualityString, lowQuality, "Quality must be a number (should not be a string) " + imageTypeString);
|
|
} else {
|
|
ok(false, "should get a data url " + imageTypeString);
|
|
}
|
|
}
|
|
|
|
checkType('jpeg');
|
|
checkType('webp');
|
|
</script>
|