| <!DOCTYPE html> |
| <title>Canvas test: toDataURL.jpeg.quality.basic</title> |
| <script src="../tests.js"></script> |
| <link rel="stylesheet" href="../tests.css"> |
| <link rel="prev" href="toDataURL.jpeg.alpha.html" title="toDataURL.jpeg.alpha"> |
| <link rel="next" href="toDataURL.jpeg.quality.notnumber.html" title="toDataURL.jpeg.quality.notnumber"> |
| <body class="show_output"> |
| <p> |
| <a href="toDataURL.jpeg.alpha.html" accesskey="p" title="[p] toDataURL.jpeg.alpha"><</a> |
| <a href="index.html">[index]</a> |
| <a href="toDataURL.jpeg.quality.notnumber.html" accesskey="n" title="[n] toDataURL.jpeg.quality.notnumber">></a> |
| <h1><a href="index.toDataURL.html">toDataURL</a>.<a href="index.toDataURL.jpeg.html">jpeg</a>.<a href="index.toDataURL.jpeg.quality.html">quality</a>.basic</h1> |
| <p class="desc">toDataURL with JPEG uses the quality parameter</p> |
| <div class="refs">References: |
| <ul> |
| <li><a href="spec.html#testrefs.toDataURL.jpeg.quality">toDataURL.jpeg.quality</a> |
| |
| </ul> |
| </div> |
| |
| <p class="output">Actual output:</p> |
| <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> |
| <p class="output expectedtext">Expected output:<p><img src="toDataURL.jpeg.quality.basic.png" class="output expected" id="expected" alt=""> |
| <ul id="d"></ul> |
| <script> |
| _addTest(function(canvas, ctx) { |
| |
| ctx.fillStyle = '#00f'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = '#0ff'; |
| ctx.fillRect(0, 3, 100, 1); |
| // Check for JPEG support first |
| var data = canvas.toDataURL('image/jpeg'); |
| if (!data.match(/^data:image\/jpeg[;,]/)) { |
| _assert(true, "true"); |
| } else { |
| var data_hi = canvas.toDataURL('image/jpeg', 0.99); |
| var data_lo = canvas.toDataURL('image/jpeg', 0.01); |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(0, 0, 100, 50); |
| deferTest(); |
| var img_hi = new Image(); |
| img_hi.onload = function () |
| { |
| var img_lo = new Image(); |
| img_lo.onload = wrapFunction(function () |
| { |
| ctx.drawImage(img_hi, 0, 0, 50, 50, 0, 0, 50, 50); |
| ctx.drawImage(img_lo, 0, 0, 50, 50, 50, 0, 50, 50); |
| |
| _assert(data_hi.length > data_lo.length, "data_hi.length > data_lo.length"); |
| _assertPixelApprox(canvas, 25,25, 0,0,255,255, "25,25", "0,0,255,255", 8); |
| _assertPixelApprox(canvas, 75,25, 0,0,255,255, "75,25", "0,0,255,255", 8); |
| }); |
| img_lo.src = data_lo; |
| }; |
| img_hi.src = data_hi; |
| } |
| |
| |
| }); |
| </script> |
| |
