| <!doctype HTML> |
| <html> |
| <head> |
| <title>HTML5 Canvas Test: Shadows for linear gradients</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="author" title="Microsoft" href="http://www.microsoft.com" /> |
| <link rel="help" href="http://www.w3.org/TR/2dcontext/#shadows" /> |
| <meta name="assert" content="Shadows must be drawn for linear gradients." /> |
| <script type="text/javascript"> |
| async_test(function(t) { |
| window.addEventListener("load", t.step_func_done(function runTest() { |
| var canvas = document.getElementById("canvas1"); |
| var ctx = canvas.getContext("2d"); |
| |
| // Draw a red rectangle. |
| ctx.fillStyle = "rgba(255, 0, 0, 1.0)"; |
| ctx.fillRect(150, 0, 100, 50); |
| |
| // Set shadow styles to draw a black shadow to overlap the red rectangle. |
| ctx.shadowOffsetX = 150; |
| ctx.shadowColor = "rgba(0, 0, 0, 1.0)"; |
| |
| // Draw a left to right, green-to-blue linear gradient. |
| var lingrad = ctx.createLinearGradient(0, 50, 100, 50); |
| lingrad.addColorStop(0, "rgba(0, 255, 0, 1.0)"); |
| lingrad.addColorStop(1, "rgba(0, 0, 255, 1.0)"); |
| ctx.fillStyle = lingrad; |
| ctx.fillRect(0, 0, 100, 50); |
| |
| // Check the red is gone |
| var data = ctx.getImageData(150, 0, 100, 50); |
| for (var i = 0; i < data.data.length; i += 4) { |
| var r = data.data[i]; |
| var g = data.data[i+1]; |
| var b = data.data[i+2]; |
| var a = data.data[i+3]; |
| assert_equals(r, 0, "r channel"); |
| assert_equals(g, 0, "g channel"); |
| assert_equals(b, 0, "b channel"); |
| assert_equals(a, 0xFF, "a channel"); |
| } |
| |
| for (var j = 0; j < data.data.length; j += 4) { |
| var r2 = data.data[j]; |
| var g2 = data.data[j+1]; |
| var b2 = data.data[j+2]; |
| var a2 = data.data[j+3]; |
| assert_false(r2 == 0xFF && g2 == 0 && b2 == 0 && a2 == 0xFF, "no red"); |
| } |
| })); |
| }, "linear gradient fillRect draws shadow (black rectange)"); |
| </script> |
| </head> |
| <body> |
| <p>Description: Shadows must be drawn for linear gradients.</p> |
| <p>Test passes if there is one gradient filled rectangle and one black rectangle, and no red seen on the page.</p> |
| <canvas id="canvas1" width="300" height="150">Browser does not support HTML5 Canvas.</canvas> |
| </body> |
| </html> |
