test_2d.composite.solid.darken.html (1191B)
1 <!DOCTYPE HTML> 2 <title>Canvas test: 2d.composite.solid.lighter</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 ctx.fillStyle = 'rgba(0, 255, 255, 1.0)'; 29 ctx.fillRect(0, 0, 100, 50); 30 ctx.globalCompositeOperation = 'darken'; 31 ctx.fillStyle = 'rgba(255, 255, 0, 1.0)'; 32 ctx.fillRect(0, 0, 100, 50); 33 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 5); 34 35 SimpleTest.finish(); 36 37 }); 38 </script>