зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
2.4 KiB
HTML
56 строки
2.4 KiB
HTML
|
<!DOCTYPE HTML>
|
||
|
|
<title>Canvas test: 2d.composite.canvas.xor</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>
|
||
|
|
function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
|
||
|
|
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+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
|
||
|
|
}
|
||
|
|
|
||
|
|
SimpleTest.waitForExplicitFinish();
|
||
|
|
addLoadEvent(function () {
|
||
|
|
|
||
|
|
var canvas = document.getElementById('c');
|
||
|
|
var ctx = canvas.getContext('2d');
|
||
|
|
var text = "I";
|
||
|
|
var colorTop = 'rgba(255,0,0,1)';
|
||
|
|
var colorBottom = 'rgba(0,255,0,1)';
|
||
|
|
var inset = 10;
|
||
|
|
var grad = ctx.createLinearGradient(inset, inset, inset, inset + 30);
|
||
|
|
|
||
|
|
// add color stops
|
||
|
|
grad.addColorStop(0, colorTop);
|
||
|
|
grad.addColorStop(1, colorBottom);
|
||
|
|
|
||
|
|
ctx.fillStyle = grad;
|
||
|
|
ctx.textBaseline = 'top';
|
||
|
|
ctx.font = '110px sans-serif'
|
||
|
|
ctx.fillText(text, -10, -20);
|
||
|
|
ctx.fillText(text, -8, -20);
|
||
|
|
ctx.fillText(text, -6, -20);
|
||
|
|
ctx.fillText(text, -4, -20);
|
||
|
|
ctx.fillText(text, -2, -20);
|
||
|
|
ctx.fillText(text, 0, -20);
|
||
|
|
ctx.fillText(text, 2, -20);
|
||
|
|
ctx.fillText(text, 4, -20);
|
||
|
|
ctx.fillText(text, 6, -20);
|
||
|
|
|
||
|
|
isPixel(ctx, 15,0, 255,0,0,255, "15,0", "255,0,0,255", 5);
|
||
|
|
isPixel(ctx, 15,49, 0,255,0,255, "15,49", "0,255,0,255", 5);
|
||
|
|
SimpleTest.finish();
|
||
|
|
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
|