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Code Issues Projects Releases Wiki Activity

Fix background rendering regression #496

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This commit is contained in:
MoyuScript
2015-01-10 20:53:06 +02:00
parent a532b6004c
commit b9f85c411d
5 changed files with 57 additions and 4 deletions
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49
tests/mocha/background.html
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@ -17,6 +17,17 @@
height: 200px;
background: green;
}
#background-block {
width: 200px;
height: 200px;
background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNgaGD4DwAChAGAJVtEDQAAAABJRU5ErkJggg==) red;
}
#gradient-block {
width: 200px;
height: 200px;
background-image: -webkit-linear-gradient(top, #008000, #008000);
background-image: linear-gradient(to bottom, #008000, #008000);
}
</style>
</head>
<body>
@ -24,6 +35,8 @@
<script>mocha.setup('bdd')</script>
<div id="block"></div>
<div id="green-block"></div>
<div id="background-block"></div>
<div id="gradient-block"></div>
<script>
describe("options.background", function() {
it("with hexcolor", function(done) {
@ -60,11 +73,47 @@
});
});
describe('element background', function() {
it('with background-color', function(done) {
html2canvas(document.querySelector("#green-block")).then(function(canvas) {
expect(canvas.width).to.equal(200);
expect(canvas.height).to.equal(200);
validCanvasPixels(canvas);
done();
}).catch(function(error) {
done(error);
});
});
it('with background-image', function(done) {
html2canvas(document.querySelector("#background-block")).then(function(canvas) {
expect(canvas.width).to.equal(200);
expect(canvas.height).to.equal(200);
validCanvasPixels(canvas);
done();
}).catch(function(error) {
done(error);
});
});
it('with gradient background-image', function(done) {
html2canvas(document.querySelector("#gradient-block")).then(function(canvas) {
expect(canvas.width).to.equal(200);
expect(canvas.height).to.equal(200);
validCanvasPixels(canvas);
done();
}).catch(function(error) {
done(error);
});
});
});
function validCanvasPixels(canvas) {
var ctx = canvas.getContext("2d");
var data = ctx.getImageData(0, 0, canvas.width, canvas.height).data;
for (var i = 0, len = data.length; i < len; i+=4) {
if (data[i] !== 0 || data[i+1] !== 128 || data[i+2] !== 0 || data[i+3] !== 255) {
console.log(i,data[i], data[i+1], data[i+2], data[i+3]);
expect().fail("Invalid canvas data");
}
}