<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<body>
<script>
async_test(t => {
// Create auxiliary canvas to draw to and create an image from.
// This is done instead of simply loading an image from the file system
// because that would throw a SECURITY_ERR DOM Exception.
var aCanvas = document.createElement('canvas');
aCanvas.width = aCanvas.height = 10;
var aCtx = aCanvas.getContext('2d');
aCtx.fillStyle = 'rgba(0, 0, 255, 1)';
aCtx.fillRect(0, 0, 50, 50);
// Create the image object to be drawn on the master canvas.
var img = new Image();
img.onload = drawImageToCanvasAndCheckPixels;
img.src = aCanvas.toDataURL(); // set a data URI of the base64 encoded image as the source
aCanvas.width = 10;
aCtx.fillStyle = 'rgba(0, 0, 255, 0.5)';
aCtx.fillRect(0, 0, 50, 50);
// Create the image object to be drawn on the master canvas.
var transparentImg = new Image();
transparentImg.onload = drawImageToCanvasAndCheckPixels;
transparentImg.src = aCanvas.toDataURL(); // set a data URI of the base64 encoded image as the source
// Create master canvas.
var canvas = document.createElement('canvas');
document.body.appendChild(canvas);
canvas.width = 150;
canvas.height = 110;
var ctx = canvas.getContext('2d');
function testPixelShadow(x, y, color)
{
assert_array_equals(ctx.getImageData(x, y, 1, 1).data, color);
}
function testPixelShadowAlpha(x, y, color)
{
var data = ctx.getImageData(x, y, 1, 1).data;
assert_array_equals(data.slice(0,3), color.slice(0,3));
assert_approx_equals(data[3], color[3], 10);
}
var testPixelShadowScenarios = [
['Verify solid shadow 1', 40, 40, [255, 0, 0, 255]],
['Verify solid shadow 2', 59, 59, [255, 0, 0, 255]],
];
var testPixelShadowAlphaScenarios = [
['Verify solid alpha shadow 1', 41, 81, [255, 0, 0, 76]],
['Verify solid alpha shadow 2', 59, 99, [255, 0, 0, 76]],
['Verify blurry shadow 1', 90, 39, [255, 0, 0, 114]],
['Verify blurry shadow 2', 90, 60, [255, 0, 0, 114]],
['Verify blurry shadow 3', 79, 50, [255, 0, 0, 114]],
['Verify blurry shadow 4', 100, 50, [255, 0, 0, 114]],
['Verify blurry alpha shadow 1', 90, 79, [255, 0, 0, 34]],
['Verify blurry alpha shadow 2', 90, 100, [255, 0, 0, 34]],
['Verify blurry alpha shadow 3', 79, 90, [255, 0, 0, 34]],
['Verify blurry alpha shadow 4', 100, 90, [255, 0, 0, 34]],
['Verify blurry shadow of image with alpha 1', 130, 39, [255, 0, 0, 57]],
['Verify blurry shadow of image with alpha 2', 130, 60, [255, 0, 0, 57]],
['Verify blurry shadow of image with alpha 3', 119, 50, [255, 0, 0, 57]],
['Verify blurry shadow of image with alpha 4', 140, 50, [255, 0, 0, 57]],
['Verify blurry alpha shadow of image with alpha 1', 130, 79, [255, 0, 0, 17]],
['Verify blurry alpha shadow of image with alpha 2', 130, 100, [255, 0, 0, 17]],
['Verify blurry alpha shadow of image with alpha 3', 119, 90, [255, 0, 0, 17]],
['Verify blurry alpha shadow of image with alpha 4', 140, 90, [255, 0, 0, 17]],
];
var imagesLoaded = 0;
function drawImageToCanvasAndCheckPixels() {
imagesLoaded = imagesLoaded + 1;
if (imagesLoaded == 2) {
ctx.scale(2, 2);
ctx.shadowOffsetX = 20;
ctx.shadowOffsetY = 20;
ctx.fillStyle = 'rgba(0, 0, 255, 1)';
ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
ctx.drawImage(img, 10, 10);
ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
ctx.drawImage(img, 10, 30);
ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
ctx.shadowBlur = 10;
ctx.drawImage(img, 30, 10);
ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
ctx.drawImage(img, 30, 30);
ctx.shadowColor = 'rgba(255, 0, 0, 1.0)';
ctx.drawImage(transparentImg, 50, 10);
ctx.shadowColor = 'rgba(255, 0, 0, 0.3)';
ctx.drawImage(transparentImg, 50, 30);
t.step(runTests);
t.done();
}
}
function runTests() {
for (var i = 0; i < testPixelShadowScenarios.length; i++)
testPixelShadow(testPixelShadowScenarios[i][1],
testPixelShadowScenarios[i][2],
testPixelShadowScenarios[i][3]);
for (var i = 0; i < testPixelShadowAlphaScenarios.length; i++)
testPixelShadowAlpha(testPixelShadowAlphaScenarios[i][1],
testPixelShadowAlphaScenarios[i][2],
testPixelShadowAlphaScenarios[i][3]);
}
}, 'Ensure correct behavior of canvas with drawImage+shadow after scaling. A blue and red checkered pattern should be displayed.');
</script>
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