sdk/tests/conformance/more/functions/drawArraysOutOfBounds.html - external/khronosgroup/webgl - Git at Google

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 <head>
 <meta charset="utf-8">
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 /*
 ** Copyright (c) 2012 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
 ** "Materials"), to deal in the Materials without restriction, including
 ** without limitation the rights to use, copy, modify, merge, publish,
 ** distribute, sublicense, and/or sell copies of the Materials, and to
 ** permit persons to whom the Materials are furnished to do so, subject to
 ** the following conditions:
 **
 ** The above copyright notice and this permission notice shall be included
 ** in all copies or substantial portions of the Materials.
 **
 ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

 -->
 <link rel="stylesheet" type="text/css" href="../unit.css" />
 <script type="application/javascript" src="../unit.js"></script>
 <script type="application/javascript" src="../util.js"></script>
 <script type="application/javascript">

 var verts = [0.0, 0.0, 0.0,   1.0, 0.0, 0.0,   0.0, 1.0, 0.0];
 var normals = [0.0, 0.0, 1.0,   0.0, 0.0, 1.0,   0.0, 0.0, 1.0];
 var texcoords = [0.0,0.0,  1.0,0.0,  0.0,1.0];

 var vertsA = new Float32Array(verts);
 var normalsA = new Float32Array(normals);
 var texcoordsA = new Float32Array(texcoords);

 Tests.startUnit = function () {
   var canvas = document.getElementById('gl');
   var gl = wrapGLContext(getGLContext(canvas));
   var prog = new Shader(gl, 'vert', 'frag');
   prog.use();
   var v = prog.attrib('Vertex');
   var n = prog.attrib('Normal');
   var t = prog.attrib('Tex');
   return [gl,prog,v,n,t];
 }

 Tests.setup = function(gl, prog, v,n,t) {
   return [gl, prog, v,n,t];
 }
 Tests.teardown = function(gl, prog, v,n,t) {
   gl.disableVertexAttribArray(v);
   gl.disableVertexAttribArray(n);
   gl.disableVertexAttribArray(t);
 }

 Tests.endUnit = function(gl, prog, v,n,t) {
   prog.destroy();
 }

 Tests.testDrawArraysEmpty = function(gl, prog, v,n,t) {
   var b = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, b);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
   assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);})
   gl.enableVertexAttribArray(v);
   assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
   gl.deleteBuffer(b);
 }

 Tests.testDrawArraysOutOfBounds = function(gl, prog, v,n,t) {
   var b = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, b);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
   assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);});
   gl.enableVertexAttribArray(v);
   assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
   assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
   assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000000000000",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
   assertGLError(gl, gl.INVALID_OPERATION, "zero size array fraction",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 1.6);});
   assertGLError(gl, gl.INVALID_VALUE, "negative offset",
       function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
   assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count",
       function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
   assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
       function(){gl.drawArrays(gl.TRIANGLES, -1, 1);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
       function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
   gl.deleteBuffer(b);
 }


 Tests.testDrawArraysWithDataOutOfBounds = function(gl, prog, v,n,t) {
   var b = gl.createBuffer();
   gl.bindBuffer(gl.ARRAY_BUFFER, b);
   gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   assertGLError(gl, gl.INVALID_OPERATION, "3 element array",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
   assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000000000000",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
   assertGLError(gl, gl.INVALID_OPERATION, "fractional count",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 1.6);});
   assertGLError(gl, gl.INVALID_VALUE, "negative offset",
       function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
   assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count",
       function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
   assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
       function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
       function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
   gl.deleteBuffer(b);
 }

 Tests.testDrawArraysMultiOutOfBounds = function(gl, prog, v,n,t) {
   var bs = [];
   bs.push(gl.createBuffer());
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
   gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   bs.push(gl.createBuffer());
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
   gl.bufferData(gl.ARRAY_BUFFER, normalsA, gl.STATIC_DRAW);
   gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
   bs.push(gl.createBuffer());
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
   gl.bufferData(gl.ARRAY_BUFFER, texcoordsA, gl.STATIC_DRAW);
   gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   gl.enableVertexAttribArray(n);
   gl.enableVertexAttribArray(t);
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 1",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   bs.push(gl.createBuffer());
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(verts.concat(verts)), gl.STATIC_DRAW);
   bs.push(gl.createBuffer());
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
   gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(texcoords.concat(texcoords)), gl.STATIC_DRAW);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
   gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
   gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   gl.enableVertexAttribArray(n);
   gl.enableVertexAttribArray(t);
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 2",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 3",
       function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
   gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
   gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   gl.enableVertexAttribArray(n);
   gl.enableVertexAttribArray(t);
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 4",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 5",
       function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
   gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[4]);
   gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   gl.enableVertexAttribArray(n);
   gl.enableVertexAttribArray(t);
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 6",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 7",
       function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
   gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
   gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
   gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   gl.enableVertexAttribArray(n);
   gl.enableVertexAttribArray(t);
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 8",
       function(){gl.drawArrays(gl.TRIANGLES, 4, 1);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count",
       function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "zero count???",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
   assertGLError(gl, gl.INVALID_OPERATION, "multi array 9",
       function(){gl.drawArrays(gl.TRIANGLES, 1, 4);});
   bs.forEach(function(b){ gl.deleteBuffer(b) });
 }


 Tests.testDrawArraysVBOOutOfBounds = function(gl, prog, v,n,t) {
   var vbo = new VBO(gl, {size:3, data:Quad.vertices});
   vbo.use(v);
   assertGLError(gl, gl.INVALID_OPERATION, "1",
       function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count",
       function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
   assertGLError(gl, gl.INVALID_OPERATION, "3",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
   assertGLError(gl, gl.INVALID_OPERATION, "4",
       function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
   vbo.destroy();
 }

 Tests.testDrawArraysVBOMultiOutOfBounds = function(gl, prog, v,n,t) {
   // creates VBOs for the quad arrays, binds them with
   // vertexAttribPointer and calls drawArrays
   var vbo = new VBO(gl,
     {size:3, data:Quad.vertices},
     {size:3, data:Quad.normals},
     {size:2, data:Quad.texcoords});
   vbo.use(v, n, t);
   assertGLError(gl, gl.INVALID_OPERATION, "1",
       function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
   assertGLError(gl, gl.INVALID_VALUE, "negative count",
       function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
   assertGLError(gl, gl.INVALID_OPERATION, "2",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
   assertGLError(gl, gl.INVALID_OPERATION, "3",
       function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
   vbo.destroy();
 }

 Tests.testDrawArraysOOBShaderJuggle = function(gl, prog, v,n,t) {
   var vbo = new VBO(gl,
     {size:3, data:[0,0,0]},
     {size:3, data:[0,0,0,0,0,0]});
   vbo.init();
   gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[0]);
   gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(v);
   assertGLError(gl, gl.INVALID_OPERATION, "offset too big",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
   var sh2 = new Shader(gl, 'vert', 'frag');
   sh2.use();
   gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[1]);
   gl.vertexAttribPointer(sh2.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(sh2.attrib('Vertex'));
   assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "offset too big 2",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
   prog.use();
   gl.vertexAttribPointer(prog.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
   gl.enableVertexAttribArray(prog.attrib('Vertex'));
   assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
   assertGLError(gl, gl.INVALID_OPERATION, "offset too big 3",
       function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
   sh2.destroy();
 }

 </script>
 <script id="vert" type="x-shader/x-vertex">
   attribute vec3 Vertex;
   attribute vec3 Normal;
   attribute vec2 Tex;

   varying vec4 texCoord0;
   void main()
   {
     gl_Position = vec4(Vertex * Normal, 1.0);
     texCoord0 = vec4(Tex,0.0,0.0) + gl_Position;
   }
 </script>
 <script id="frag" type="x-shader/x-fragment">
   precision mediump float;

   varying vec4 texCoord0;
   void main()
   {
     gl_FragColor = texCoord0;
   }
 </script>


 <style>canvas{ position:absolute; }</style>
 </head><body>
   <canvas id="gl" width="1" height="1"></canvas>
 </body></html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<!--

	/*
	** Copyright (c) 2012 The Khronos Group Inc.
	**
	** Permission is hereby granted, free of charge, to any person obtaining a
	** copy of this software and/or associated documentation files (the
	** "Materials"), to deal in the Materials without restriction, including
	** without limitation the rights to use, copy, modify, merge, publish,
	** distribute, sublicense, and/or sell copies of the Materials, and to
	** permit persons to whom the Materials are furnished to do so, subject to
	** the following conditions:
	**
	** The above copyright notice and this permission notice shall be included
	** in all copies or substantial portions of the Materials.
	**
	** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
	*/

	-->
	<link rel="stylesheet" type="text/css" href="../unit.css" />
	<script type="application/javascript" src="../unit.js"></script>
	<script type="application/javascript" src="../util.js"></script>
	<script type="application/javascript">

	var verts = [0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0];
	var normals = [0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0];
	var texcoords = [0.0,0.0, 1.0,0.0, 0.0,1.0];

	var vertsA = new Float32Array(verts);
	var normalsA = new Float32Array(normals);
	var texcoordsA = new Float32Array(texcoords);

	Tests.startUnit = function () {
	var canvas = document.getElementById('gl');
	var gl = wrapGLContext(getGLContext(canvas));
	var prog = new Shader(gl, 'vert', 'frag');
	prog.use();
	var v = prog.attrib('Vertex');
	var n = prog.attrib('Normal');
	var t = prog.attrib('Tex');
	return [gl,prog,v,n,t];
	}

	Tests.setup = function(gl, prog, v,n,t) {
	return [gl, prog, v,n,t];
	}
	Tests.teardown = function(gl, prog, v,n,t) {
	gl.disableVertexAttribArray(v);
	gl.disableVertexAttribArray(n);
	gl.disableVertexAttribArray(t);
	}

	Tests.endUnit = function(gl, prog, v,n,t) {
	prog.destroy();
	}

	Tests.testDrawArraysEmpty = function(gl, prog, v,n,t) {
	var b = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, b);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
	assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);})
	gl.enableVertexAttribArray(v);
	assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
	gl.deleteBuffer(b);
	}

	Tests.testDrawArraysOutOfBounds = function(gl, prog, v,n,t) {
	var b = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, b);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([]), gl.STATIC_DRAW);
	assertOk(function(){gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);});
	gl.enableVertexAttribArray(v);
	assertGLError(gl, gl.INVALID_OPERATION, "zero size array",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
	assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
	assertGLError(gl, gl.INVALID_OPERATION, "zero size array 10000000000000",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
	assertGLError(gl, gl.INVALID_OPERATION, "zero size array fraction",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 1.6);});
	assertGLError(gl, gl.INVALID_VALUE, "negative offset",
	function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
	assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 1);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count",
	function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
	assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
	function(){gl.drawArrays(gl.TRIANGLES, -1, 1);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
	function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
	gl.deleteBuffer(b);
	}


	Tests.testDrawArraysWithDataOutOfBounds = function(gl, prog, v,n,t) {
	var b = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, b);
	gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	assertGLError(gl, gl.INVALID_OPERATION, "3 element array",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 10000);});
	assertGLError(gl, gl.INVALID_OPERATION, "3 element array 10000000000000",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 10000000000000);});
	assertGLError(gl, gl.INVALID_OPERATION, "fractional count",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 1.6);});
	assertGLError(gl, gl.INVALID_VALUE, "negative offset",
	function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
	assertGLError(gl, gl.INVALID_OPERATION, "count out of range",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count",
	function(){gl.drawArrays(gl.TRIANGLES, 0, -1);});
	assertGLError(gl, gl.INVALID_VALUE, "positive count, negative offset",
	function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count, positive offset",
	function(){gl.drawArrays(gl.TRIANGLES, 1, -1);});
	gl.deleteBuffer(b);
	}

	Tests.testDrawArraysMultiOutOfBounds = function(gl, prog, v,n,t) {
	var bs = [];
	bs.push(gl.createBuffer());
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
	gl.bufferData(gl.ARRAY_BUFFER, vertsA, gl.STATIC_DRAW);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	bs.push(gl.createBuffer());
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
	gl.bufferData(gl.ARRAY_BUFFER, normalsA, gl.STATIC_DRAW);
	gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
	bs.push(gl.createBuffer());
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
	gl.bufferData(gl.ARRAY_BUFFER, texcoordsA, gl.STATIC_DRAW);
	gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	gl.enableVertexAttribArray(n);
	gl.enableVertexAttribArray(t);
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 1",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	bs.push(gl.createBuffer());
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(verts.concat(verts)), gl.STATIC_DRAW);
	bs.push(gl.createBuffer());
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[bs.length-1]);
	gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(texcoords.concat(texcoords)), gl.STATIC_DRAW);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
	gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
	gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	gl.enableVertexAttribArray(n);
	gl.enableVertexAttribArray(t);
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 2",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 3",
	function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
	gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
	gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	gl.enableVertexAttribArray(n);
	gl.enableVertexAttribArray(t);
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 4",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 5",
	function(){gl.drawArrays(gl.TRIANGLES, 4, 2);});
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[0]);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[1]);
	gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[4]);
	gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	gl.enableVertexAttribArray(n);
	gl.enableVertexAttribArray(t);
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 6",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 7",
	function(){gl.drawArrays(gl.TRIANGLES, 3, 2);});
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[3]);
	gl.vertexAttribPointer(n, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ARRAY_BUFFER, bs[2]);
	gl.vertexAttribPointer(t, 2, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	gl.enableVertexAttribArray(n);
	gl.enableVertexAttribArray(t);
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 8",
	function(){gl.drawArrays(gl.TRIANGLES, 4, 1);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count",
	function(){gl.drawArrays(gl.TRIANGLES, -1, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "zero count???",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 4);});
	assertGLError(gl, gl.INVALID_OPERATION, "multi array 9",
	function(){gl.drawArrays(gl.TRIANGLES, 1, 4);});
	bs.forEach(function(b){ gl.deleteBuffer(b) });
	}


	Tests.testDrawArraysVBOOutOfBounds = function(gl, prog, v,n,t) {
	var vbo = new VBO(gl, {size:3, data:Quad.vertices});
	vbo.use(v);
	assertGLError(gl, gl.INVALID_OPERATION, "1",
	function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count",
	function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
	assertGLError(gl, gl.INVALID_OPERATION, "3",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
	assertGLError(gl, gl.INVALID_OPERATION, "4",
	function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
	vbo.destroy();
	}

	Tests.testDrawArraysVBOMultiOutOfBounds = function(gl, prog, v,n,t) {
	// creates VBOs for the quad arrays, binds them with
	// vertexAttribPointer and calls drawArrays
	var vbo = new VBO(gl,
	{size:3, data:Quad.vertices},
	{size:3, data:Quad.normals},
	{size:2, data:Quad.texcoords});
	vbo.use(v, n, t);
	assertGLError(gl, gl.INVALID_OPERATION, "1",
	function(){gl.drawArrays(gl.TRIANGLES, 6, 1);});
	assertGLError(gl, gl.INVALID_VALUE, "negative count",
	function(){gl.drawArrays(gl.TRIANGLES, 2, -1);});
	assertGLError(gl, gl.INVALID_OPERATION, "2",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 7);});
	assertGLError(gl, gl.INVALID_OPERATION, "3",
	function(){gl.drawArrays(gl.TRIANGLES, 1, 6);});
	vbo.destroy();
	}

	Tests.testDrawArraysOOBShaderJuggle = function(gl, prog, v,n,t) {
	var vbo = new VBO(gl,
	{size:3, data:[0,0,0]},
	{size:3, data:[0,0,0,0,0,0]});
	vbo.init();
	gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[0]);
	gl.vertexAttribPointer(v, 3, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(v);
	assertGLError(gl, gl.INVALID_OPERATION, "offset too big",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
	var sh2 = new Shader(gl, 'vert', 'frag');
	sh2.use();
	gl.bindBuffer(gl.ARRAY_BUFFER, vbo.vbos[1]);
	gl.vertexAttribPointer(sh2.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(sh2.attrib('Vertex'));
	assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "offset too big 2",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
	prog.use();
	gl.vertexAttribPointer(prog.attrib('Vertex'), 3, gl.FLOAT, false, 0, 0);
	gl.enableVertexAttribArray(prog.attrib('Vertex'));
	assertOk(function(){gl.drawArrays(gl.TRIANGLES, 0, 2);});
	assertGLError(gl, gl.INVALID_OPERATION, "offset too big 3",
	function(){gl.drawArrays(gl.TRIANGLES, 0, 3);});
	sh2.destroy();
	}

	</script>
	<script id="vert" type="x-shader/x-vertex">
	attribute vec3 Vertex;
	attribute vec3 Normal;
	attribute vec2 Tex;

	varying vec4 texCoord0;
	void main()
	{
	gl_Position = vec4(Vertex * Normal, 1.0);
	texCoord0 = vec4(Tex,0.0,0.0) + gl_Position;
	}
	</script>
	<script id="frag" type="x-shader/x-fragment">
	precision mediump float;

	varying vec4 texCoord0;
	void main()
	{
	gl_FragColor = texCoord0;
	}
	</script>


	<style>canvas{ position:absolute; }</style>
	</head><body>
	<canvas id="gl" width="1" height="1"></canvas>
	</body></html>