test_2d.fillText.gradient.html (2471B)
1 <!DOCTYPE HTML> 2 <title>Canvas test: 2d.composite.canvas.xor</title> 3 <script src="/tests/SimpleTest/SimpleTest.js"></script> 4 <link rel="stylesheet" href="/tests/SimpleTest/test.css"> 5 <body> 6 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> 7 <script> 8 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) { 9 var pixel = ctx.getImageData(x, y, 1, 1); 10 var pr = pixel.data[0], 11 pg = pixel.data[1], 12 pb = pixel.data[2], 13 pa = pixel.data[3]; 14 ok(r-d <= pr && pr <= r+d && 15 g-d <= pg && pg <= g+d && 16 b-d <= pb && pb <= b+d && 17 a-d <= pa && pa <= a+d, 18 "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d); 19 } 20 21 SimpleTest.waitForExplicitFinish(); 22 addLoadEvent(function () { 23 24 var canvas = document.getElementById('c'); 25 var ctx = canvas.getContext('2d'); 26 var text = "I"; 27 var colorTop = 'rgba(255,0,0,1)'; 28 var colorBottom = 'rgba(0,255,0,1)'; 29 var inset = 10; 30 var grad = ctx.createLinearGradient(inset, inset, inset, inset + 30); 31 32 // add color stops 33 grad.addColorStop(0, colorTop); 34 grad.addColorStop(1, colorBottom); 35 36 ctx.fillStyle = grad; 37 ctx.textBaseline = 'top'; 38 ctx.font = '110px sans-serif' 39 ctx.fillText(text, -10, -20); 40 ctx.fillText(text, -8, -20); 41 ctx.fillText(text, -6, -20); 42 ctx.fillText(text, -4, -20); 43 ctx.fillText(text, -2, -20); 44 ctx.fillText(text, 0, -20); 45 ctx.fillText(text, 2, -20); 46 ctx.fillText(text, 4, -20); 47 ctx.fillText(text, 6, -20); 48 49 isPixel(ctx, 15,0, 255,0,0,255, "15,0", "255,0,0,255", 5); 50 isPixel(ctx, 15,49, 0,255,0,255, "15,49", "0,255,0,255", 5); 51 SimpleTest.finish(); 52 53 }); 54 </script>