<!DOCTYPE HTML >
<title >Canvas test: canvas demotion</title >
<script src="/tests/SimpleTest/SimpleTest.js" ></script >
<link rel="stylesheet" href="/tests/SimpleTest/test.css" >
<body >
<canvas id="c" width="100" height="50" ><p class="fallback" >FAIL (fallback content)</p></canvas >
<script >
SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("untriaged" );
addLoadEvent(function () {
var canvas = document.getElementById('c' );
var ctx = canvas .getContext('2d' );
ctx.fillStyle = 'rgb(50, 50, 50)' ;
ctx.fillRect(0 , 0 , 100 , 50 );
ctx.translate(25 , 25 );
SpecialPowers.wrap(ctx).demote();
setTimeout(function() {
ctx.fillStyle = 'rgb(127, 127, 127)' ;
ctx.fillRect(0 , 0 , 10 , 10 );
var pixels = ctx.getImageData(0 , 0 , 1 , 1 );
ok(pixels.data[0 ] === 50 , "pixels.data[0] expected 50, got " + pixels.data[0 ]);
ok(pixels.data[1 ] === 50 , "pixels.data[1] expected 50, got " + pixels.data[1 ]);
ok(pixels.data[2 ] === 50 , "pixels.data[2] expected 50, got " + pixels.data[2 ]);
pixels = ctx.getImageData(25 , 25 , 1 , 1 );
ok(pixels.data[0 ] === 127 , "pixels.data[0] expected 127, got " + pixels.data[0 ]);
ok(pixels.data[1 ] === 127 , "pixels.data[1] expected 127, got " + pixels.data[1 ]);
ok(pixels.data[2 ] === 127 , "pixels.data[2] expected 127, got " + pixels.data[2 ]);
SimpleTest.finish();
}, 50 );
});
</script >
Messung V0.5 in Prozent C=100 H=100 G=100
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-06-09)
¤
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