test_2d.composite.canvas.hard-light.html (1438B)
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 27 28 var canvas2 = document.createElement('canvas'); 29 canvas2.width = canvas.width; 30 canvas2.height = canvas.height; 31 var ctx2 = canvas2.getContext('2d'); 32 ctx2.drawImage(document.getElementById('yellow75.png'), 0, 0); 33 ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; 34 ctx.fillRect(0, 0, 100, 50); 35 ctx.globalCompositeOperation = 'hard-light'; 36 ctx.drawImage(canvas2, 0, 0); 37 isPixel(ctx, 50,25, 218,255,36,223, "50,25", "218,255,36,223", 5); 38 39 SimpleTest.finish(); 40 41 }); 42 </script> 43 <img src="image_yellow75.png" id="yellow75.png" class="resource">