toDataURL.jpeg.alpha.html (1520B)
1 <!DOCTYPE html> 2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> 3 <title>Canvas test: toDataURL.jpeg.alpha</title> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script src="/html/canvas/resources/canvas-tests.js"></script> 7 <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css"> 8 <body class="show_output"> 9 10 <h1>toDataURL.jpeg.alpha</h1> 11 <p class="desc">toDataURL with JPEG composites onto black</p> 12 13 14 <p class="output">Actual output:</p> 15 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> 16 <p class="output expectedtext">Expected output:<p><img src="toDataURL.jpeg.alpha.png" class="output expected" id="expected" alt=""> 17 <ul id="d"></ul> 18 <script> 19 var t = async_test("toDataURL with JPEG composites onto black"); 20 _addTest(function(canvas, ctx) { 21 22 ctx.fillStyle = 'rgba(128, 255, 128, 0.5)'; 23 ctx.fillRect(0, 0, 100, 50); 24 ctx.globalCompositeOperation = 'destination-over'; // should be ignored by toDataURL 25 var data = canvas.toDataURL('image/jpeg'); 26 ctx.globalCompositeOperation = 'source-over'; 27 if (!data.match(/^data:image\/jpeg[;,]/)) { 28 _assert(true, "true"); 29 } else { 30 ctx.fillStyle = '#f00'; 31 ctx.fillRect(0, 0, 100, 50); 32 var img = new Image(); 33 deferTest(); 34 img.onload = t.step_func_done(function () 35 { 36 ctx.drawImage(img, 0, 0); 37 _assertPixelApprox(canvas, 50,25, 63,127,63,255, 8); 38 }); 39 img.src = data; 40 } 41 42 43 }); 44 </script>