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Add options.background option

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This commit is contained in:
Niklas von Hertzen 2014-11-04 21:53:26 +02:00
parent fc800bff9d
commit 657eb983cf
4 changed files with 91 additions and 2 deletions
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3
dist/html2canvas.js vendored
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@ -2807,6 +2807,9 @@ function CanvasRenderer(width, height) {
this.canvas.height = height; this.canvas.height = height;
} }
this.ctx = this.canvas.getContext("2d"); this.ctx = this.canvas.getContext("2d");
if (this.options.background) {
this.rectangle(0, 0, width, height, this.options.background);
}
this.taintCtx = this.document.createElement("canvas").getContext("2d"); this.taintCtx = this.document.createElement("canvas").getContext("2d");
this.ctx.textBaseline = "bottom"; this.ctx.textBaseline = "bottom";
this.variables = {}; this.variables = {};

4
dist/html2canvas.min.js vendored
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File diff suppressed because one or more lines are too long

3
src/renderers/canvas.js
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@ -6,6 +6,9 @@ function CanvasRenderer(width, height) {
this.canvas.height = height; this.canvas.height = height;
} }
this.ctx = this.canvas.getContext("2d"); this.ctx = this.canvas.getContext("2d");
if (this.options.background) {
this.rectangle(0, 0, width, height, this.options.background);
}
this.taintCtx = this.document.createElement("canvas").getContext("2d"); this.taintCtx = this.document.createElement("canvas").getContext("2d");
this.ctx.textBaseline = "bottom"; this.ctx.textBaseline = "bottom";
this.variables = {}; this.variables = {};

83
tests/mocha/background.html Normal file
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@ -0,0 +1,83 @@
<html>
<head>
<meta charset="utf-8">
<title>Mocha Tests</title>
<link rel="stylesheet" href="lib/mocha.css" />
<script src="../../dist/html2canvas.js"></script>
<script src="../assets/jquery-1.6.2.js"></script>
<script src="lib/expect.js"></script>
<script src="lib/mocha.js"></script>
<style>
#block {
width: 200px;
height: 200px;
}
#green-block {
width: 200px;
height: 200px;
background: green;
}
</style>
</head>
<body>
<div id="mocha"></div>
<script>mocha.setup('bdd')</script>
<div id="block"></div>
<div id="green-block"></div>
<script>
describe("options.background", function() {
it("with hexcolor", function(done) {
html2canvas(document.querySelector("#block"), {background: '#008000'}).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 named color", function(done) {
html2canvas(document.querySelector("#block"), {background: 'green'}).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 element background", function(done) {
html2canvas(document.querySelector("#green-block"), {background: 'red'}).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) {
expect().fail("Invalid canvas data");
}
}
}
mocha.checkLeaks();
mocha.globals(['jQuery']);
if (window.mochaPhantomJS) {
mochaPhantomJS.run();
}
else {
mocha.run();
}
</script>
</body>
</html>