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<!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>
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