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Add support for rendering webgl canvas content (#646)

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This commit is contained in:
Niklas von Hertzen 2017-12-11 20:17:20 +08:00
parent 2237e8e230
commit 250208dc99
2 changed files with 25 additions and 22 deletions
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14
src/Clone.js
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@ -346,13 +346,13 @@ const cloneCanvasContents = (canvas: HTMLCanvasElement, clonedCanvas: HTMLCanvas
if (clonedCanvas) { if (clonedCanvas) {
clonedCanvas.width = canvas.width; clonedCanvas.width = canvas.width;
clonedCanvas.height = canvas.height; clonedCanvas.height = canvas.height;
clonedCanvas const ctx = canvas.getContext('2d');
.getContext('2d') const clonedCtx = clonedCanvas.getContext('2d');
.putImageData( if (ctx) {
canvas.getContext('2d').getImageData(0, 0, canvas.width, canvas.height), clonedCtx.putImageData(ctx.getImageData(0, 0, canvas.width, canvas.height), 0, 0);
0, } else {
0 clonedCtx.drawImage(canvas, 0, 0);
); }
} }
} catch (e) {} } catch (e) {}
}; };

23
tests/reftests/images/canvas.html
View File

@ -1,27 +1,30 @@
<!DOCTYPE html> <!DOCTYPE html>
<html> <html>
<head> <head>
<title>Image tests</title> <title>Image tests</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="../../test.js"></script> <script type="text/javascript" src="../../test.js"></script>
<script type="text/javascript"> <script type="text/javascript">
function setUp() { function setUp() {
if ($('#testcanvas')[0].getContext) { var ctx = document.querySelector('#testcanvas').getContext('2d');
var ctx = $('#testcanvas')[0].getContext('2d');
ctx.fillStyle = "rgb(200,0,0)"; ctx.fillStyle = "rgb(200,0,0)";
ctx.fillRect (10, 10, 55, 50); ctx.fillRect (10, 10, 55, 50);
ctx.fillStyle = "rgba(0, 0, 200, 0.5)"; ctx.fillStyle = "rgba(0, 0, 200, 0.5)";
ctx.fillRect (30, 30, 55, 50); ctx.fillRect (30, 30, 55, 50);
} else {
$('#testcanvas').remove(); var gl = document.querySelector('#webglcanvas').getContext('webgl', {preserveDrawingBuffer: true});
if (gl) {
gl.clearColor(0.0, 1.0, 0.0, 1.0);
gl.clear(gl.COLOR_BUFFER_BIT);
}
} }
};
</script> </script>
</head> </head>
<body> <body>
<canvas id="testcanvas" style="width:700px;height:300px;"></canvas> <canvas id="testcanvas" style="width:700px;height:300px;"></canvas>
</body> <canvas id="webglcanvas" style="width:300px;height:300px;"></canvas>
</body>
</html> </html>