LayoutTests/fast/canvas/webgl/canvas-zero-size.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
   <head>
   <meta charset="utf-8">
     <title>Zero Size Canvas Test</title>
     <script src="../../../resources/js-test.js"></script>
     <script src="resources/webgl-test.js"> </script>
     <script src="resources/webgl-test-utils.js"> </script>
 </head>
 <body>
 <div id="description"></div>
 <div id="console"></div>
 <script>
 description("Tests that a zero size canvas does not fail.");
 var wtu = WebGLTestUtils;
 var canvas = document.createElement('canvas');
 var gl = wtu.create3DContext(canvas);
 canvas.width = 0;
 canvas.height = 0;
 gl.viewport(0, 0, 0, 0);
 var program = wtu.setupTexturedQuad(gl);
 shouldBeTrue("program != null");
 var tex = gl.createTexture();
 gl.bindTexture(gl.TEXTURE_2D, tex);
 var pixel = new Uint8Array([0, 255, 0, 255]);
 gl.texImage2D(
   gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, pixel);
 wtu.drawQuad(gl);

 glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Zero Size Canvas Test</title>
	<script src="../../../resources/js-test.js"></script>
	<script src="resources/webgl-test.js"> </script>
	<script src="resources/webgl-test-utils.js"> </script>
	</head>
	<body>
	<div id="description"></div>
	<div id="console"></div>
	<script>
	description("Tests that a zero size canvas does not fail.");
	var wtu = WebGLTestUtils;
	var canvas = document.createElement('canvas');
	var gl = wtu.create3DContext(canvas);
	canvas.width = 0;
	canvas.height = 0;
	gl.viewport(0, 0, 0, 0);
	var program = wtu.setupTexturedQuad(gl);
	shouldBeTrue("program != null");
	var tex = gl.createTexture();
	gl.bindTexture(gl.TEXTURE_2D, tex);
	var pixel = new Uint8Array([0, 255, 0, 255]);
	gl.texImage2D(
	gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, pixel);
	wtu.drawQuad(gl);

	glErrorShouldBe(gl, gl.NO_ERROR, "Should be no errors from setup.");
	</script>
	</body>
	</html>