LayoutTests/fast/canvas/webgl/gl-bind-attrib-location-before-compile-test.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>WebGL BindAttribLocation (Before Compile) Conformance Tests</title>
 <script src="../../../resources/js-test.js"></script>
 <script src="resources/webgl-test.js"></script>
 </head>
 <body>
 <div id="description"></div>
 <div id="console"></div>
 <canvas style="border: 1px solid black;" id="canvas" width="50" height="50"></canvas>
 <script id="vshader" type="text/something-not-javascript">
 attribute vec4 _glesVertex;
 attribute vec4 vColor;
 varying vec4 color;
 void main()
 {
   gl_Position = _glesVertex;
   color = vColor;
 }
 </script>
 <script id="fshader" type="text/something-not-javascript">
 #ifdef GL_ES
 precision highp float;
 #endif
 varying vec4 color;
 void main()
 {
   gl_FragColor = color;
 }
 </script>
 <script>
 description("This test ensures WebGL implementations properly handle bindAttribLocation before compiling shaders.");

 if (window.internals)
     window.internals.settings.setWebGLErrorsToConsoleEnabled(false);

 debug("");
 debug("Canvas.getContext");

 var gl = create3DContext(document.getElementById("canvas"));
 shouldBeNonNull(gl);

 function fail(x,y, buf, shouldBe)
 {
   var i = (y*50+x) * 4;
   var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
   testFailed(reason);
 }

 function pass()
 {
   testPassed("drawing is correct");
 }

 function loadShader(shaderType, shaderId) {
   // Get the shader source.
   var shaderSource = document.getElementById(shaderId).text;

   // Create the shader object
   var shader = gl.createShader(shaderType);
   if (shader == null) {
     debug("*** Error: unable to create shader '"+shaderId+"'");
     return null;
   }

   // Load the shader source
   gl.shaderSource(shader, shaderSource);

   // Compile the shader
   gl.compileShader(shader);

   // Check the compile status
   var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
   if (!compiled) {
     // Something went wrong during compilation; get the error
     var error = gl.getShaderInfoLog(shader);
     debug("*** Error compiling shader '"+shader+"':"+error);
     gl.deleteShader(shader);
     return null;
   }
   return shader;
 }

 debug("");
 debug("Checking gl.bindAttribLocation.");

 var program = gl.createProgram();

 // Bind _glesVertex BEFORE we comile the program.
 gl.bindAttribLocation(program, 5, "_glesVertex");
 glErrorShouldBe(gl, gl.NO_ERROR,
     "bindAttribLocation should return NO_ERROR when called before compiling shader.");

 var vs = loadShader(gl.VERTEX_SHADER, "vshader");
 var fs = loadShader(gl.FRAGMENT_SHADER, "fshader");
 gl.attachShader(program, vs);
 gl.attachShader(program, fs);

 var positions = gl.createBuffer();
 gl.bindBuffer(gl.ARRAY_BUFFER, positions);
 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);

 var colors = gl.createBuffer();
 gl.bindBuffer(gl.ARRAY_BUFFER, colors);
 gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
     0,1,0,1,
     0,1,0,1,
     0,1,0,1]), gl.STATIC_DRAW);

 function setBindLocations(colorLocation, positionLocation) {
   gl.bindAttribLocation(program, colorLocation, "vColor");
   gl.linkProgram(program);
   gl.useProgram(program);
   var linked = (gl.getProgramParameter(program, gl.LINK_STATUS) != 0);
   assertMsg(linked, "program linked successfully");

   debug("_glesVertex:" + gl.getAttribLocation(program, "_glesVertex"))
   debug("vColor   :" + gl.getAttribLocation(program, "vColor"))
   assertMsg(gl.getAttribLocation(program, "_glesVertex") == positionLocation,
             "location of _glesVertex should be " + positionLocation);
   assertMsg(gl.getAttribLocation(program, "vColor") == colorLocation,
             "location of vColor should be " + colorLocation);

   var ploc = gl.getAttribLocation(program, "_glesVertex");
   var cloc = gl.getAttribLocation(program, "vColor");
   gl.bindBuffer(gl.ARRAY_BUFFER, positions);
   gl.enableVertexAttribArray(positionLocation);
   gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, colors);
   gl.enableVertexAttribArray(colorLocation);
   gl.vertexAttribPointer(colorLocation, 4, gl.FLOAT, false, 0, 0);
 }

 function checkDraw(colorLocation, positionLocation, r, g, b, a) {
   gl.clearColor(0, 0, 0, 1);
   gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
   gl.drawArrays(gl.TRIANGLES, 0, 3);

   var width = 50;
   var height = 50;
   var buf = new Uint8Array(width * height * 4);
   gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf);

   function checkPixel(x, y, r, g, b, a) {
     var offset = (y * width + x) * 4;
     if (buf[offset + 0] != r ||
         buf[offset + 1] != g ||
         buf[offset + 2] != b ||
         buf[offset + 3] != a) {
         fail(x, y, buf, "(" + r + "," + g + "," + b + "," + a + ")");
         return false;
     }
     return true;
   }

   // Test several locations
   // First line should be all black
   var success = true;
   for (var i = 0; i < 50; ++i)
     success = success && checkPixel(i, 0, 0, 0, 0, 255);

   // Line 15 should be red for at least 10 rgba pixels starting 20 pixels in
   var offset = (15 * 50 + 20) * 4;
   for (var i = 0; i < 10; ++i)
     success = success && checkPixel(20 + i, 15, r, g, b, a);

   // Last line should be all black
   for (var i = 0; i < 50; ++i)
     success = success && checkPixel(i, 49, 0, 0, 0, 255);

   if (success)
     pass();

   gl.disableVertexAttribArray(positionLocation);
   gl.disableVertexAttribArray(colorLocation);
 }

 setBindLocations(2, 5);
 checkDraw(2, 5, 0, 255, 0, 255);

 setBindLocations(1, 5);
 gl.disableVertexAttribArray(0);
 gl.vertexAttrib4f(0, 1, 0, 0, 1);
 checkDraw(1, 5, 255, 0, 0, 255);

 glErrorShouldBe(gl, gl.NO_ERROR);

 debug("");

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<title>WebGL BindAttribLocation (Before Compile) Conformance Tests</title>
	<script src="../../../resources/js-test.js"></script>
	<script src="resources/webgl-test.js"></script>
	</head>
	<body>
	<div id="description"></div>
	<div id="console"></div>
	<canvas style="border: 1px solid black;" id="canvas" width="50" height="50"></canvas>
	<script id="vshader" type="text/something-not-javascript">
	attribute vec4 _glesVertex;
	attribute vec4 vColor;
	varying vec4 color;
	void main()
	{
	gl_Position = _glesVertex;
	color = vColor;
	}
	</script>
	<script id="fshader" type="text/something-not-javascript">
	#ifdef GL_ES
	precision highp float;
	#endif
	varying vec4 color;
	void main()
	{
	gl_FragColor = color;
	}
	</script>
	<script>
	description("This test ensures WebGL implementations properly handle bindAttribLocation before compiling shaders.");

	if (window.internals)
	window.internals.settings.setWebGLErrorsToConsoleEnabled(false);

	debug("");
	debug("Canvas.getContext");

	var gl = create3DContext(document.getElementById("canvas"));
	shouldBeNonNull(gl);

	function fail(x,y, buf, shouldBe)
	{
	var i = (y50+x) 4;
	var reason = "pixel at ("+x+","+y+") is ("+buf[i]+","+buf[i+1]+","+buf[i+2]+","+buf[i+3]+"), should be "+shouldBe;
	testFailed(reason);
	}

	function pass()
	{
	testPassed("drawing is correct");
	}

	function loadShader(shaderType, shaderId) {
	// Get the shader source.
	var shaderSource = document.getElementById(shaderId).text;

	// Create the shader object
	var shader = gl.createShader(shaderType);
	if (shader == null) {
	debug("*** Error: unable to create shader '"+shaderId+"'");
	return null;
	}

	// Load the shader source
	gl.shaderSource(shader, shaderSource);

	// Compile the shader
	gl.compileShader(shader);

	// Check the compile status
	var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
	if (!compiled) {
	// Something went wrong during compilation; get the error
	var error = gl.getShaderInfoLog(shader);
	debug("*** Error compiling shader '"+shader+"':"+error);
	gl.deleteShader(shader);
	return null;
	}
	return shader;
	}

	debug("");
	debug("Checking gl.bindAttribLocation.");

	var program = gl.createProgram();

	// Bind _glesVertex BEFORE we comile the program.
	gl.bindAttribLocation(program, 5, "_glesVertex");
	glErrorShouldBe(gl, gl.NO_ERROR,
	"bindAttribLocation should return NO_ERROR when called before compiling shader.");

	var vs = loadShader(gl.VERTEX_SHADER, "vshader");
	var fs = loadShader(gl.FRAGMENT_SHADER, "fshader");
	gl.attachShader(program, vs);
	gl.attachShader(program, fs);

	var positions = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, positions);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ 0,0.5,0, -0.5,-0.5,0, 0.5,-0.5,0 ]), gl.STATIC_DRAW);

	var colors = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, colors);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
	0,1,0,1,
	0,1,0,1,
	0,1,0,1]), gl.STATIC_DRAW);

	function setBindLocations(colorLocation, positionLocation) {
	gl.bindAttribLocation(program, colorLocation, "vColor");
	gl.linkProgram(program);
	gl.useProgram(program);
	var linked = (gl.getProgramParameter(program, gl.LINK_STATUS) != 0);
	assertMsg(linked, "program linked successfully");

	debug("_glesVertex:" + gl.getAttribLocation(program, "_glesVertex"))
	debug("vColor :" + gl.getAttribLocation(program, "vColor"))
	assertMsg(gl.getAttribLocation(program, "_glesVertex") == positionLocation,
	"location of _glesVertex should be " + positionLocation);
	assertMsg(gl.getAttribLocation(program, "vColor") == colorLocation,
	"location of vColor should be " + colorLocation);

	var ploc = gl.getAttribLocation(program, "_glesVertex");
	var cloc = gl.getAttribLocation(program, "vColor");
	gl.bindBuffer(gl.ARRAY_BUFFER, positions);
	gl.enableVertexAttribArray(positionLocation);
	gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, colors);
	gl.enableVertexAttribArray(colorLocation);
	gl.vertexAttribPointer(colorLocation, 4, gl.FLOAT, false, 0, 0);
	}

	function checkDraw(colorLocation, positionLocation, r, g, b, a) {
	gl.clearColor(0, 0, 0, 1);
	gl.clear(gl.COLOR_BUFFER_BIT \| gl.DEPTH_BUFFER_BIT);
	gl.drawArrays(gl.TRIANGLES, 0, 3);

	var width = 50;
	var height = 50;
	var buf = new Uint8Array(width * height * 4);
	gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, buf);

	function checkPixel(x, y, r, g, b, a) {
	var offset = (y * width + x) * 4;
	if (buf[offset + 0] != r \|\|
	buf[offset + 1] != g \|\|
	buf[offset + 2] != b \|\|
	buf[offset + 3] != a) {
	fail(x, y, buf, "(" + r + "," + g + "," + b + "," + a + ")");
	return false;
	}
	return true;
	}

	// Test several locations
	// First line should be all black
	var success = true;
	for (var i = 0; i < 50; ++i)
	success = success && checkPixel(i, 0, 0, 0, 0, 255);

	// Line 15 should be red for at least 10 rgba pixels starting 20 pixels in
	var offset = (15 * 50 + 20) * 4;
	for (var i = 0; i < 10; ++i)
	success = success && checkPixel(20 + i, 15, r, g, b, a);

	// Last line should be all black
	for (var i = 0; i < 50; ++i)
	success = success && checkPixel(i, 49, 0, 0, 0, 255);

	if (success)
	pass();

	gl.disableVertexAttribArray(positionLocation);
	gl.disableVertexAttribArray(colorLocation);
	}

	setBindLocations(2, 5);
	checkDraw(2, 5, 0, 255, 0, 255);

	setBindLocations(1, 5);
	gl.disableVertexAttribArray(0);
	gl.vertexAttrib4f(0, 1, 0, 0, 1);
	checkDraw(1, 5, 255, 0, 0, 255);

	glErrorShouldBe(gl, gl.NO_ERROR);

	debug("");

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