gecko/content/canvas/test/test_2d.path.arcTo.shape.curve1.html

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HTML

<!DOCTYPE HTML>
<title>Canvas test: 2d.path.arcTo.shape.curve1</title>
<!-- Testing: arcTo() curves in the right kind of shape -->
<script src="/MochiKit/packed.js"></script>
<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);
}
function todo_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];
todo(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();
MochiKit.DOM.addLoadEvent(function () {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
var tol = 1.5; // tolerance to avoid antialiasing artifacts
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
ctx.strokeStyle = '#f00';
ctx.lineWidth = 10;
ctx.beginPath();
ctx.moveTo(10, 25);
ctx.arcTo(75, 25, 75, 60, 20);
ctx.stroke();
ctx.fillStyle = '#0f0';
ctx.beginPath();
ctx.rect(10, 20, 45, 10);
ctx.moveTo(80, 45);
ctx.arc(55, 45, 25+tol, 0, -Math.PI/2, true);
ctx.arc(55, 45, 15-tol, -Math.PI/2, 0, false);
ctx.fill();
isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
isPixel(ctx, 55,19, 0,255,0,255, "55,19", "0,255,0,255", 0);
isPixel(ctx, 55,20, 0,255,0,255, "55,20", "0,255,0,255", 0);
isPixel(ctx, 55,21, 0,255,0,255, "55,21", "0,255,0,255", 0);
isPixel(ctx, 64,22, 0,255,0,255, "64,22", "0,255,0,255", 0);
isPixel(ctx, 65,21, 0,255,0,255, "65,21", "0,255,0,255", 0);
isPixel(ctx, 72,28, 0,255,0,255, "72,28", "0,255,0,255", 0);
isPixel(ctx, 73,27, 0,255,0,255, "73,27", "0,255,0,255", 0);
isPixel(ctx, 78,36, 0,255,0,255, "78,36", "0,255,0,255", 0);
isPixel(ctx, 79,35, 0,255,0,255, "79,35", "0,255,0,255", 0);
isPixel(ctx, 80,44, 0,255,0,255, "80,44", "0,255,0,255", 0);
todo_isPixel(ctx, 80,45, 0,255,0,255, "80,45", "0,255,0,255", 0);
todo_isPixel(ctx, 80,46, 0,255,0,255, "80,46", "0,255,0,255", 0);
SimpleTest.finish();
});
</script>