test_2d.line.join.parallel.html (1417B)
1 <!DOCTYPE HTML> 2 <title>Canvas test: 2d.line.join.parallel</title> 3 <!-- Testing: Line joins are drawn at 180-degree joins --> 4 <script src="/tests/SimpleTest/SimpleTest.js"></script> 5 <link rel="stylesheet" href="/tests/SimpleTest/test.css"> 6 <body> 7 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> 8 <script> 9 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) { 10 var pixel = ctx.getImageData(x, y, 1, 1); 11 var pr = pixel.data[0], 12 pg = pixel.data[1], 13 pb = pixel.data[2], 14 pa = pixel.data[3]; 15 ok(r-d <= pr && pr <= r+d && 16 g-d <= pg && pg <= g+d && 17 b-d <= pb && pb <= b+d && 18 a-d <= pa && pa <= a+d, 19 "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d); 20 } 21 22 SimpleTest.waitForExplicitFinish(); 23 addLoadEvent(function () { 24 25 var canvas = document.getElementById('c'); 26 var ctx = canvas.getContext('2d'); 27 28 ctx.fillStyle = '#f00'; 29 ctx.fillRect(0, 0, 100, 50); 30 31 ctx.strokeStyle = '#0f0'; 32 ctx.lineWidth = 300; 33 ctx.lineJoin = 'round'; 34 ctx.beginPath(); 35 ctx.moveTo(-100, 25); 36 ctx.lineTo(0, 25); 37 ctx.lineTo(-100, 25); 38 ctx.stroke(); 39 40 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0); 41 isPixel(ctx, 48,1, 0,255,0,255, "48,1", "0,255,0,255", 0); 42 isPixel(ctx, 48,48, 0,255,0,255, "48,48", "0,255,0,255", 0); 43 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0); 44 45 SimpleTest.finish(); 46 47 }); 48 </script>