LayoutTests/fast/canvas/webgl/attrib-location-length-limits.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>WebGL attrib location length tests</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>
 <canvas id="example" width="50" height="50">
 There is supposed to be an example drawing here, but it's not important.
 </canvas>
 <div id="description">Verify limits on the lengths of attrib locations.</div>
 <div id="console"></div>
 <script id="goodVertexShader1" type="x-shader/x-vertex">
 // A vertex shader where the needed attrib location is long, but not over the limit.
 attribute vec4 vPosition01234567890123456789012345678901234567890123456789012345678901234567890;

 void main()
 {
     gl_Position = vPosition01234567890123456789012345678901234567890123456789012345678901234567890;
 }
 </script>
 <script id="goodVertexShader2" type="x-shader/x-vertex">
 // A vertex shader where the needed attrib location is exactly 256 characters.
 attribute vec4 vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;

 void main()
 {
     gl_Position = vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;
 }
 </script>
 <script id="badVertexShader" type="x-shader/x-vertex">
 // A vertex shader where the needed attrib location is 257 characters.
 attribute vec4 vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;

 void main()
 {
     gl_Position = vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;
 }
 </script>
 <script id="fragmentShader" type="x-shader/x-fragment">
 precision mediump float;

 void main() {
     gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
 }
 </script>
 <script>
 if (window.initNonKhronosFramework) {
     window.initNonKhronosFramework(false);
 }
 if (window.internals)
     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);

 var wtu = WebGLTestUtils;
 var gl = wtu.create3DContext(document.getElementById("example"));

 debug("Test attrib location underneath the length limit");
 var program = wtu.loadProgramFromScript(gl, "goodVertexShader1", "fragmentShader");
 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
 var attribLoc = gl.getAttribLocation(program, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890");
 if (attribLoc == -1) {
     testFailed("attrib location was -1, should not be");
 } else {
     testPassed("attrib location should not be -1");
 }
 wtu.glErrorShouldBe(gl, gl.NONE);

 debug("Test attrib location exactly at the length limit");
 var program = wtu.loadProgramFromScript(gl, "goodVertexShader2", "fragmentShader");
 shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
 var attribLoc = gl.getAttribLocation(program, "vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456");
 if (attribLoc == -1) {
     testFailed("attrib location was -1, should not be");
 } else {
     testPassed("attrib location should not be -1");
 }
 wtu.glErrorShouldBe(gl, gl.NONE);

 debug("Test attrib location over the length limit");
 debug("Shader compilation should fail");
 shouldBe('wtu.loadShaderFromScript(gl, "badVertexShader", gl.VERTEX_SHADER, function (err) {})', 'null');
 wtu.glErrorShouldBe(gl, gl.NONE);

 debug("Attempt to bind too-long attrib location should produce error");
 var program = gl.createProgram();
 gl.bindAttribLocation(program, 0, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567");
 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);

 debug("Attempt to fetch too-long attrib location should produce error");
 shouldBe('gl.getAttribLocation(program, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567")', '-1');
 wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebGL attrib location length tests</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>
	<canvas id="example" width="50" height="50">
	There is supposed to be an example drawing here, but it's not important.
	</canvas>
	<div id="description">Verify limits on the lengths of attrib locations.</div>
	<div id="console"></div>
	<script id="goodVertexShader1" type="x-shader/x-vertex">
	// A vertex shader where the needed attrib location is long, but not over the limit.
	attribute vec4 vPosition01234567890123456789012345678901234567890123456789012345678901234567890;

	void main()
	{
	gl_Position = vPosition01234567890123456789012345678901234567890123456789012345678901234567890;
	}
	</script>
	<script id="goodVertexShader2" type="x-shader/x-vertex">
	// A vertex shader where the needed attrib location is exactly 256 characters.
	attribute vec4 vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;

	void main()
	{
	gl_Position = vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456;
	}
	</script>
	<script id="badVertexShader" type="x-shader/x-vertex">
	// A vertex shader where the needed attrib location is 257 characters.
	attribute vec4 vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;

	void main()
	{
	gl_Position = vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567;
	}
	</script>
	<script id="fragmentShader" type="x-shader/x-fragment">
	precision mediump float;

	void main() {
	gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
	}
	</script>
	<script>
	if (window.initNonKhronosFramework) {
	window.initNonKhronosFramework(false);
	}
	if (window.internals)
	window.internals.settings.setWebGLErrorsToConsoleEnabled(false);

	var wtu = WebGLTestUtils;
	var gl = wtu.create3DContext(document.getElementById("example"));

	debug("Test attrib location underneath the length limit");
	var program = wtu.loadProgramFromScript(gl, "goodVertexShader1", "fragmentShader");
	shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
	var attribLoc = gl.getAttribLocation(program, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890");
	if (attribLoc == -1) {
	testFailed("attrib location was -1, should not be");
	} else {
	testPassed("attrib location should not be -1");
	}
	wtu.glErrorShouldBe(gl, gl.NONE);

	debug("Test attrib location exactly at the length limit");
	var program = wtu.loadProgramFromScript(gl, "goodVertexShader2", "fragmentShader");
	shouldBe('gl.getProgramParameter(program, gl.LINK_STATUS)', 'true');
	var attribLoc = gl.getAttribLocation(program, "vPosition0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456");
	if (attribLoc == -1) {
	testFailed("attrib location was -1, should not be");
	} else {
	testPassed("attrib location should not be -1");
	}
	wtu.glErrorShouldBe(gl, gl.NONE);

	debug("Test attrib location over the length limit");
	debug("Shader compilation should fail");
	shouldBe('wtu.loadShaderFromScript(gl, "badVertexShader", gl.VERTEX_SHADER, function (err) {})', 'null');
	wtu.glErrorShouldBe(gl, gl.NONE);

	debug("Attempt to bind too-long attrib location should produce error");
	var program = gl.createProgram();
	gl.bindAttribLocation(program, 0, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567");
	wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);

	debug("Attempt to fetch too-long attrib location should produce error");
	shouldBe('gl.getAttribLocation(program, "vPosition01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567")', '-1');
	wtu.glErrorShouldBe(gl, gl.INVALID_VALUE);

	</script>
	</body>
	</html>