Remove everthing except conformance tests in the deps/third_party/webgl

third_party/webgl/sdk/tests/conformance/more/util.js

Index: third_party/webgl/sdk/tests/conformance/more/util.js
===================================================================
--- third_party/webgl/sdk/tests/conformance/more/util.js	(revision 121077)
+++ third_party/webgl/sdk/tests/conformance/more/util.js	(working copy)
@@ -1,1247 +0,0 @@
-/*
-Utilities for the OpenGL ES 2.0 HTML Canvas context
-
-Copyright (C) 2011  Ilmari Heikkinen <ilmari.heikkinen@gmail.com>
-
-Permission is hereby granted, free of charge, to any person
-obtaining a copy of this software and associated documentation
-files (the "Software"), to deal in the Software without
-restriction, including without limitation the rights to use,
-copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the
-Software is 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 Software.
-
-THE SOFTWARE IS 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 SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-*/
-
-function loadTexture(gl, elem, mipmaps) {
-  var tex = gl.createTexture();
-  gl.bindTexture(gl.TEXTURE_2D, tex);
-  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, elem);
-  if (mipmaps != false)
-    gl.generateMipmap(gl.TEXTURE_2D);
-  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
-  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
-  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-  if (mipmaps)
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR);
-  else
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-  return tex;
-}
-
-function getShader(gl, id) {
-  var shaderScript = document.getElementById(id);
-  if (!shaderScript) {
-    throw(new Error("No shader element with id: "+id));
-  }
-
-  var str = "";
-  var k = shaderScript.firstChild;
-  while (k) {
-    if (k.nodeType == 3)
-      str += k.textContent;
-    k = k.nextSibling;
-  }
-
-  var shader;
-  if (shaderScript.type == "x-shader/x-fragment") {
-    shader = gl.createShader(gl.FRAGMENT_SHADER);
-  } else if (shaderScript.type == "x-shader/x-vertex") {
-    shader = gl.createShader(gl.VERTEX_SHADER);
-  } else {
-    throw(new Error("Unknown shader type "+shaderScript.type));
-  }
-
-  gl.shaderSource(shader, str);
-  gl.compileShader(shader);
-
-  if (gl.getShaderParameter(shader, gl.COMPILE_STATUS) != 1) {
-    var ilog = gl.getShaderInfoLog(shader);
-    gl.deleteShader(shader);
-    throw(new Error("Failed to compile shader "+shaderScript.id + ", Shader info log: " + ilog));
-  }
-  return shader;
-}
-
-function loadShaderArray(gl, shaders) {
-  var id = gl.createProgram();
-  var shaderObjs = [];
-  for (var i=0; i<shaders.length; ++i) {
-    try {
-      var sh = getShader(gl, shaders[i]);
-      shaderObjs.push(sh);
-      gl.attachShader(id, sh);
-    } catch (e) {
-      var pr = {program: id, shaders: shaderObjs};
-      deleteShader(gl, pr);
-      throw (e);
-    }
-  }
-  var prog = {program: id, shaders: shaderObjs};
-  gl.linkProgram(id);
-  gl.validateProgram(id);
-  if (gl.getProgramParameter(id, gl.LINK_STATUS) != 1) {
-    deleteShader(gl,prog);
-    throw(new Error("Failed to link shader"));
-  }
-  if (gl.getProgramParameter(id, gl.VALIDATE_STATUS) != 1) {
-    deleteShader(gl,prog);
-    throw(new Error("Failed to validate shader"));
-  }
-  return prog;
-}
-function loadShader(gl) {
-  var sh = [];
-  for (var i=1; i<arguments.length; ++i)
-    sh.push(arguments[i]);
-  return loadShaderArray(gl, sh);
-}
-
-function deleteShader(gl, sh) {
-  gl.useProgram(null);
-  sh.shaders.forEach(function(s){
-    gl.detachShader(sh.program, s);
-    gl.deleteShader(s);
-  });
-  gl.deleteProgram(sh.program);
-}
-
-function getGLErrorAsString(ctx, err) {
-  if (err === ctx.NO_ERROR) {
-    return "NO_ERROR";
-  }
-  for (var name in ctx) {
-    if (ctx[name] === err) {
-      return name;
-    }
-  }
-  return err.toString();
-}
-
-function checkError(gl, msg) {
-  var e = gl.getError();
-  if (e != gl.NO_ERROR) {
-    log("Error " + getGLErrorAsString(gl, e) + " at " + msg);
-  }
-  return e;
-}
-
-function throwError(gl, msg) {
-  var e = gl.getError();
-  if (e != 0) {
-    throw(new Error("Error " + getGLErrorAsString(gl, e) + " at " + msg));
-  }
-}
-
-Math.cot = function(z) { return 1.0 / Math.tan(z); }
-
-/*
-  Matrix utilities, using the OpenGL element order where
-  the last 4 elements are the translation column.
-
-  Uses flat arrays as matrices for performance.
-
-  Most operations have in-place variants to avoid allocating temporary matrices.
-
-  Naming logic:
-    Matrix.method operates on a 4x4 Matrix and returns a new Matrix.
-    Matrix.method3x3 operates on a 3x3 Matrix and returns a new Matrix. Not all operations have a 3x3 version (as 3x3 is usually only used for the normal matrix: Matrix.transpose3x3(Matrix.inverseTo3x3(mat4x4)))
-    Matrix.method[3x3]InPlace(args, target) stores its result in the target matrix.
-
-    Matrix.scale([sx, sy, sz]) -- non-uniform scale by vector
-    Matrix.scale1(s)           -- uniform scale by scalar
-    Matrix.scale3(sx, sy, sz)  -- non-uniform scale by scalars
-
-    Ditto for translate.
-*/
-Matrix = {
-  identity : [
-    1.0, 0.0, 0.0, 0.0,
-    0.0, 1.0, 0.0, 0.0,
-    0.0, 0.0, 1.0, 0.0,
-    0.0, 0.0, 0.0, 1.0
-  ],
-
-  newIdentity : function() {
-    return [
-      1.0, 0.0, 0.0, 0.0,
-      0.0, 1.0, 0.0, 0.0,
-      0.0, 0.0, 1.0, 0.0,
-      0.0, 0.0, 0.0, 1.0
-    ];
-  },
-
-  newIdentity3x3 : function() {
-    return [
-      1.0, 0.0, 0.0,
-      0.0, 1.0, 0.0,
-      0.0, 0.0, 1.0
-    ];
-  },
-
-  copyMatrix : function(src, dst) {
-    for (var i=0; i<16; i++) dst[i] = src[i];
-    return dst;
-  },
-
-  to3x3 : function(m) {
-    return [
-      m[0], m[1], m[2],
-      m[4], m[5], m[6],
-      m[8], m[9], m[10]
-    ];
-  },
-
-  // orthonormal matrix inverse
-  inverseON : function(m) {
-    var n = this.transpose4x4(m);
-    var t = [m[12], m[13], m[14]];
-    n[3] = n[7] = n[11] = 0;
-    n[12] = -Vec3.dot([n[0], n[4], n[8]], t);
-    n[13] = -Vec3.dot([n[1], n[5], n[9]], t);
-    n[14] = -Vec3.dot([n[2], n[6], n[10]], t);
-    return n;
-  },
-
-  inverseTo3x3 : function(m) {
-    return this.inverse4x4to3x3InPlace(m, this.newIdentity3x3());
-  },
-
-  inverseTo3x3InPlace : function(m,n) {
-    var a11 = m[10]*m[5]-m[6]*m[9],
-        a21 = -m[10]*m[1]+m[2]*m[9],
-        a31 = m[6]*m[1]-m[2]*m[5],
-        a12 = -m[10]*m[4]+m[6]*m[8],
-        a22 = m[10]*m[0]-m[2]*m[8],
-        a32 = -m[6]*m[0]+m[2]*m[4],
-        a13 = m[9]*m[4]-m[5]*m[8],
-        a23 = -m[9]*m[0]+m[1]*m[8],
-        a33 = m[5]*m[0]-m[1]*m[4];
-    var det = m[0]*(a11) + m[1]*(a12) + m[2]*(a13);
-    if (det == 0) // no inverse
-      return [1,0,0,0,1,0,0,0,1];
-    var idet = 1 / det;
-    n[0] = idet*a11;
-    n[1] = idet*a21;
-    n[2] = idet*a31;
-    n[3] = idet*a12;
-    n[4] = idet*a22;
-    n[5] = idet*a32;
-    n[6] = idet*a13;
-    n[7] = idet*a23;
-    n[8] = idet*a33;
-    return n;
-  },
-
-  inverse3x3 : function(m) {
-    return this.inverse3x3InPlace(m, this.newIdentity3x3());
-  },
-
-  inverse3x3InPlace : function(m,n) {
-    var a11 = m[8]*m[4]-m[5]*m[7],
-        a21 = -m[8]*m[1]+m[2]*m[7],
-        a31 = m[5]*m[1]-m[2]*m[4],
-        a12 = -m[8]*m[3]+m[5]*m[6],
-        a22 = m[8]*m[0]-m[2]*m[6],
-        a32 = -m[5]*m[0]+m[2]*m[3],
-        a13 = m[7]*m[4]-m[4]*m[8],
-        a23 = -m[7]*m[0]+m[1]*m[6],
-        a33 = m[4]*m[0]-m[1]*m[3];
-    var det = m[0]*(a11) + m[1]*(a12) + m[2]*(a13);
-    if (det == 0) // no inverse
-      return [1,0,0,0,1,0,0,0,1];
-    var idet = 1 / det;
-    n[0] = idet*a11;
-    n[1] = idet*a21;
-    n[2] = idet*a31;
-    n[3] = idet*a12;
-    n[4] = idet*a22;
-    n[5] = idet*a32;
-    n[6] = idet*a13;
-    n[7] = idet*a23;
-    n[8] = idet*a33;
-    return n;
-  },
-
-  frustum : function (left, right, bottom, top, znear, zfar) {
-    var X = 2*znear/(right-left);
-    var Y = 2*znear/(top-bottom);
-    var A = (right+left)/(right-left);
-    var B = (top+bottom)/(top-bottom);
-    var C = -(zfar+znear)/(zfar-znear);
-    var D = -2*zfar*znear/(zfar-znear);
-
-    return [
-      X, 0, 0, 0,
-      0, Y, 0, 0,
-      A, B, C, -1,
-      0, 0, D, 0
-    ];
- },
-
-  perspective : function (fovy, aspect, znear, zfar) {
-    var ymax = znear * Math.tan(fovy * Math.PI / 360.0);
-    var ymin = -ymax;
-    var xmin = ymin * aspect;
-    var xmax = ymax * aspect;
-
-    return this.frustum(xmin, xmax, ymin, ymax, znear, zfar);
-  },
-
-  mul4x4 : function (a,b) {
-    return this.mul4x4InPlace(a,b,this.newIdentity());
-  },
-
-  mul4x4InPlace : function (a, b, c) {
-        c[0] =   b[0] * a[0] +
-                 b[0+1] * a[4] +
-                 b[0+2] * a[8] +
-                 b[0+3] * a[12];
-        c[0+1] = b[0] * a[1] +
-                 b[0+1] * a[5] +
-                 b[0+2] * a[9] +
-                 b[0+3] * a[13];
-        c[0+2] = b[0] * a[2] +
-                 b[0+1] * a[6] +
-                 b[0+2] * a[10] +
-                 b[0+3] * a[14];
-        c[0+3] = b[0] * a[3] +
-                 b[0+1] * a[7] +
-                 b[0+2] * a[11] +
-                 b[0+3] * a[15];
-        c[4] =   b[4] * a[0] +
-                 b[4+1] * a[4] +
-                 b[4+2] * a[8] +
-                 b[4+3] * a[12];
-        c[4+1] = b[4] * a[1] +
-                 b[4+1] * a[5] +
-                 b[4+2] * a[9] +
-                 b[4+3] * a[13];
-        c[4+2] = b[4] * a[2] +
-                 b[4+1] * a[6] +
-                 b[4+2] * a[10] +
-                 b[4+3] * a[14];
-        c[4+3] = b[4] * a[3] +
-                 b[4+1] * a[7] +
-                 b[4+2] * a[11] +
-                 b[4+3] * a[15];
-        c[8] =   b[8] * a[0] +
-                 b[8+1] * a[4] +
-                 b[8+2] * a[8] +
-                 b[8+3] * a[12];
-        c[8+1] = b[8] * a[1] +
-                 b[8+1] * a[5] +
-                 b[8+2] * a[9] +
-                 b[8+3] * a[13];
-        c[8+2] = b[8] * a[2] +
-                 b[8+1] * a[6] +
-                 b[8+2] * a[10] +
-                 b[8+3] * a[14];
-        c[8+3] = b[8] * a[3] +
-                 b[8+1] * a[7] +
-                 b[8+2] * a[11] +
-                 b[8+3] * a[15];
-        c[12] =   b[12] * a[0] +
-                 b[12+1] * a[4] +
-                 b[12+2] * a[8] +
-                 b[12+3] * a[12];
-        c[12+1] = b[12] * a[1] +
-                 b[12+1] * a[5] +
-                 b[12+2] * a[9] +
-                 b[12+3] * a[13];
-        c[12+2] = b[12] * a[2] +
-                 b[12+1] * a[6] +
-                 b[12+2] * a[10] +
-                 b[12+3] * a[14];
-        c[12+3] = b[12] * a[3] +
-                 b[12+1] * a[7] +
-                 b[12+2] * a[11] +
-                 b[12+3] * a[15];
-    return c;
-  },
-
-  mulv4 : function (a, v) {
-    c = new Array(4);
-    for (var i=0; i<4; ++i) {
-      var x = 0;
-      for (var k=0; k<4; ++k)
-        x += v[k] * a[k*4+i];
-      c[i] = x;
-    }
-    return c;
-  },
-
-  rotate : function (angle, axis) {
-    axis = Vec3.normalize(axis);
-    var x=axis[0], y=axis[1], z=axis[2];
-    var c = Math.cos(angle);
-    var c1 = 1-c;
-    var s = Math.sin(angle);
-    return [
-      x*x*c1+c, y*x*c1+z*s, z*x*c1-y*s, 0,
-      x*y*c1-z*s, y*y*c1+c, y*z*c1+x*s, 0,
-      x*z*c1+y*s, y*z*c1-x*s, z*z*c1+c, 0,
-      0,0,0,1
-    ];
-  },
-  rotateInPlace : function(angle, axis, m) {
-    axis = Vec3.normalize(axis);
-    var x=axis[0], y=axis[1], z=axis[2];
-    var c = Math.cos(angle);
-    var c1 = 1-c;
-    var s = Math.sin(angle);
-    var tmpMatrix = this.tmpMatrix;
-    var tmpMatrix2 = this.tmpMatrix2;
-    tmpMatrix[0] = x*x*c1+c; tmpMatrix[1] = y*x*c1+z*s; tmpMatrix[2] = z*x*c1-y*s; tmpMatrix[3] = 0;
-    tmpMatrix[4] = x*y*c1-z*s; tmpMatrix[5] = y*y*c1+c; tmpMatrix[6] = y*z*c1+x*s; tmpMatrix[7] = 0;
-    tmpMatrix[8] = x*z*c1+y*s; tmpMatrix[9] = y*z*c1-x*s; tmpMatrix[10] = z*z*c1+c; tmpMatrix[11] = 0;
-    tmpMatrix[12] = 0; tmpMatrix[13] = 0; tmpMatrix[14] = 0; tmpMatrix[15] = 1;
-    this.copyMatrix(m, tmpMatrix2);
-    return this.mul4x4InPlace(tmpMatrix2, tmpMatrix, m);
-  },
-
-  scale : function(v) {
-    return [
-      v[0], 0, 0, 0,
-      0, v[1], 0, 0,
-      0, 0, v[2], 0,
-      0, 0, 0, 1
-    ];
-  },
-  scale3 : function(x,y,z) {
-    return [
-      x, 0, 0, 0,
-      0, y, 0, 0,
-      0, 0, z, 0,
-      0, 0, 0, 1
-    ];
-  },
-  scale1 : function(s) {
-    return [
-      s, 0, 0, 0,
-      0, s, 0, 0,
-      0, 0, s, 0,
-      0, 0, 0, 1
-    ];
-  },
-  scale3InPlace : function(x, y, z, m) {
-    var tmpMatrix = this.tmpMatrix;
-    var tmpMatrix2 = this.tmpMatrix2;
-    tmpMatrix[0] = x; tmpMatrix[1] = 0; tmpMatrix[2] = 0; tmpMatrix[3] = 0;
-    tmpMatrix[4] = 0; tmpMatrix[5] = y; tmpMatrix[6] = 0; tmpMatrix[7] = 0;
-    tmpMatrix[8] = 0; tmpMatrix[9] = 0; tmpMatrix[10] = z; tmpMatrix[11] = 0;
-    tmpMatrix[12] = 0; tmpMatrix[13] = 0; tmpMatrix[14] = 0; tmpMatrix[15] = 1;
-    this.copyMatrix(m, tmpMatrix2);
-    return this.mul4x4InPlace(tmpMatrix2, tmpMatrix, m);
-  },
-  scale1InPlace : function(s, m) { return this.scale3InPlace(s, s, s, m); },
-  scaleInPlace : function(s, m) { return this.scale3InPlace(s[0],s[1],s[2],m); },
-
-  translate3 : function(x,y,z) {
-    return [
-      1, 0, 0, 0,
-      0, 1, 0, 0,
-      0, 0, 1, 0,
-      x, y, z, 1
-    ];
-  },
-
-  translate : function(v) {
-    return this.translate3(v[0], v[1], v[2]);
-  },
-  tmpMatrix : [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0],
-  tmpMatrix2 : [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0],
-  translate3InPlace : function(x,y,z,m) {
-    var tmpMatrix = this.tmpMatrix;
-    var tmpMatrix2 = this.tmpMatrix2;
-    tmpMatrix[0] = 1; tmpMatrix[1] = 0; tmpMatrix[2] = 0; tmpMatrix[3] = 0;
-    tmpMatrix[4] = 0; tmpMatrix[5] = 1; tmpMatrix[6] = 0; tmpMatrix[7] = 0;
-    tmpMatrix[8] = 0; tmpMatrix[9] = 0; tmpMatrix[10] = 1; tmpMatrix[11] = 0;
-    tmpMatrix[12] = x; tmpMatrix[13] = y; tmpMatrix[14] = z; tmpMatrix[15] = 1;
-    this.copyMatrix(m, tmpMatrix2);
-    return this.mul4x4InPlace(tmpMatrix2, tmpMatrix, m);
-  },
-  translateInPlace : function(v,m){ return this.translate3InPlace(v[0], v[1], v[2], m); },
-
-  lookAt : function (eye, center, up) {
-    var z = Vec3.direction(eye, center);
-    var x = Vec3.normalizeInPlace(Vec3.cross(up, z));
-    var y = Vec3.normalizeInPlace(Vec3.cross(z, x));
-
-    var m = [
-      x[0], y[0], z[0], 0,
-      x[1], y[1], z[1], 0,
-      x[2], y[2], z[2], 0,
-      0, 0, 0, 1
-    ];
-
-    var t = [
-      1, 0, 0, 0,
-      0, 1, 0, 0,
-      0, 0, 1, 0,
-      -eye[0], -eye[1], -eye[2], 1
-    ];
-
-    return this.mul4x4(m,t);
-  },
-
-  transpose4x4 : function(m) {
-    return [
-      m[0], m[4], m[8], m[12],
-      m[1], m[5], m[9], m[13],
-      m[2], m[6], m[10], m[14],
-      m[3], m[7], m[11], m[15]
-    ];
-  },
-
-  transpose4x4InPlace : function(m) {
-    var tmp = 0.0;
-    tmp = m[1]; m[1] = m[4]; m[4] = tmp;
-    tmp = m[2]; m[2] = m[8]; m[8] = tmp;
-    tmp = m[3]; m[3] = m[12]; m[12] = tmp;
-    tmp = m[6]; m[6] = m[9]; m[9] = tmp;
-    tmp = m[7]; m[7] = m[13]; m[13] = tmp;
-    tmp = m[11]; m[11] = m[14]; m[14] = tmp;
-    return m;
-  },
-
-  transpose3x3 : function(m) {
-    return [
-      m[0], m[3], m[6],
-      m[1], m[4], m[7],
-      m[2], m[5], m[8]
-    ];
-  },
-
-  transpose3x3InPlace : function(m) {
-    var tmp = 0.0;
-    tmp = m[1]; m[1] = m[3]; m[3] = tmp;
-    tmp = m[2]; m[2] = m[6]; m[6] = tmp;
-    tmp = m[5]; m[5] = m[7]; m[7] = tmp;
-    return m;
-  },
-}
-
-Vec3 = {
-  make : function() { return [0,0,0]; },
-  copy : function(v) { return [v[0],v[1],v[2]]; },
-
-  add : function (u,v) {
-    return [u[0]+v[0], u[1]+v[1], u[2]+v[2]];
-  },
-
-  sub : function (u,v) {
-    return [u[0]-v[0], u[1]-v[1], u[2]-v[2]];
-  },
-
-  negate : function (u) {
-    return [-u[0], -u[1], -u[2]];
-  },
-
-  direction : function (u,v) {
-    return this.normalizeInPlace(this.sub(u,v));
-  },
-
-  normalizeInPlace : function(v) {
-    var imag = 1.0 / Math.sqrt(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
-    v[0] *= imag; v[1] *= imag; v[2] *= imag;
-    return v;
-  },
-
-  normalize : function(v) {
-    return this.normalizeInPlace(this.copy(v));
-  },
-
-  scale : function(f, v) {
-    return [f*v[0], f*v[1], f*v[2]];
-  },
-
-  dot : function(u,v) {
-    return u[0]*v[0] + u[1]*v[1] + u[2]*v[2];
-  },
-
-  inner : function(u,v) {
-    return [u[0]*v[0], u[1]*v[1], u[2]*v[2]];
-  },
-
-  cross : function(u,v) {
-    return [
-      u[1]*v[2] - u[2]*v[1],
-      u[2]*v[0] - u[0]*v[2],
-      u[0]*v[1] - u[1]*v[0]
-    ];
-  }
-}
-
-Shader = function(gl){
-  this.gl = gl;
-  this.shaders = [];
-  this.uniformLocations = {};
-  this.attribLocations = {};
-  for (var i=1; i<arguments.length; i++) {
-    this.shaders.push(arguments[i]);
-  }
-}
-Shader.prototype = {
-  id : null,
-  gl : null,
-  compiled : false,
-  shader : null,
-  shaders : [],
-
-  destroy : function() {
-    if (this.shader != null) deleteShader(this.gl, this.shader);
-  },
-
-  compile : function() {
-    this.shader = loadShaderArray(this.gl, this.shaders);
-  },
-
-  use : function() {
-    if (this.shader == null)
-      this.compile();
-    this.gl.useProgram(this.shader.program);
-  },
-
-  uniform1fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform1fv(loc, value);
-  },
-
-  uniform2fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform2fv(loc, value);
-  },
-
-  uniform3fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform3fv(loc, value);
-  },
-
-  uniform4fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform4fv(loc, value);
-  },
-
-  uniform1f : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform1f(loc, value);
-  },
-
-  uniform2f : function(name, v1,v2) {
-    var loc = this.uniform(name);
-    this.gl.uniform2f(loc, v1,v2);
-  },
-
-  uniform3f : function(name, v1,v2,v3) {
-    var loc = this.uniform(name);
-    this.gl.uniform3f(loc, v1,v2,v3);
-  },
-
-  uniform4f : function(name, v1,v2,v3,v4) {
-    var loc = this.uniform(name);
-    this.gl.uniform4f(loc, v1, v2, v3, v4);
-  },
-
-  uniform1iv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform1iv(loc, value);
-  },
-
-  uniform2iv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform2iv(loc, value);
-  },
-
-  uniform3iv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform3iv(loc, value);
-  },
-
-  uniform4iv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform4iv(loc, value);
-  },
-
-  uniform1i : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniform1i(loc, value);
-  },
-
-  uniform2i : function(name, v1,v2) {
-    var loc = this.uniform(name);
-    this.gl.uniform2i(loc, v1,v2);
-  },
-
-  uniform3i : function(name, v1,v2,v3) {
-    var loc = this.uniform(name);
-    this.gl.uniform3i(loc, v1,v2,v3);
-  },
-
-  uniform4i : function(name, v1,v2,v3,v4) {
-    var loc = this.uniform(name);
-    this.gl.uniform4i(loc, v1, v2, v3, v4);
-  },
-
-  uniformMatrix4fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniformMatrix4fv(loc, false, value);
-  },
-
-  uniformMatrix3fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniformMatrix3fv(loc, false, value);
-  },
-
-  uniformMatrix2fv : function(name, value) {
-    var loc = this.uniform(name);
-    this.gl.uniformMatrix2fv(loc, false, value);
-  },
-
-  attrib : function(name) {
-    if (this.attribLocations[name] == null) {
-      var loc = this.gl.getAttribLocation(this.shader.program, name);
-      this.attribLocations[name] = loc;
-    }
-    return this.attribLocations[name];
-  },
-
-  uniform : function(name) {
-    if (this.uniformLocations[name] == null) {
-      var loc = this.gl.getUniformLocation(this.shader.program, name);
-      this.uniformLocations[name] = loc;
-    }
-    return this.uniformLocations[name];
-  }
-}
-Filter = function(gl, shader) {
-  Shader.apply(this, arguments);
-}
-Filter.prototype = new Shader();
-Filter.prototype.apply = function(init) {
-  this.use();
-  var va = this.attrib("Vertex");
-  var ta = this.attrib("Tex");
-  var vbo = Quad.getCachedVBO(this.gl);
-  if (init) init(this);
-  vbo.draw(va, null, ta);
-}
-
-
-VBO = function(gl) {
-  this.gl = gl;
-  this.data = [];
-  this.elementsVBO = null;
-  for (var i=1; i<arguments.length; i++) {
-    if (arguments[i].elements)
-      this.elements = arguments[i];
-    else
-      this.data.push(arguments[i]);
-  }
-}
-
-VBO.prototype = {
-  initialized : false,
-  length : 0,
-  vbos : null,
-  type : 'TRIANGLES',
-  elementsVBO : null,
-  elements : null,
-
-  setData : function() {
-    this.destroy();
-    this.data = [];
-    for (var i=0; i<arguments.length; i++) {
-      if (arguments[i].elements)
-        this.elements = arguments[i];
-      else
-        this.data.push(arguments[i]);
-    }
-  },
-
-  destroy : function() {
-    if (this.vbos != null)
-      for (var i=0; i<this.vbos.length; i++)
-        this.gl.deleteBuffer(this.vbos[i]);
-    if (this.elementsVBO != null)
-      this.gl.deleteBuffer(this.elementsVBO);
-    this.length = this.elementsLength = 0;
-    this.vbos = this.elementsVBO = null;
-    this.initialized = false;
-  },
-
-  init : function() {
-    this.destroy();
-    var gl = this.gl;
-
-    gl.getError();
-    var vbos = [];
-    var length = 0;
-    for (var i=0; i<this.data.length; i++)
-      vbos.push(gl.createBuffer());
-    if (this.elements != null)
-      this.elementsVBO = gl.createBuffer();
-    try {
-      throwError(gl, "genBuffers");
-      for (var i = 0; i<this.data.length; i++) {
-        var d = this.data[i];
-        var dlen = Math.floor(d.data.length / d.size);
-        if (i == 0 || dlen < length)
-            length = dlen;
-        if (!d.floatArray)
-          d.floatArray = new Float32Array(d.data);
-        gl.bindBuffer(gl.ARRAY_BUFFER, vbos[i]);
-        throwError(gl, "bindBuffer");
-        gl.bufferData(gl.ARRAY_BUFFER, d.floatArray, gl.STATIC_DRAW);
-        throwError(gl, "bufferData");
-      }
-      if (this.elementsVBO != null) {
-        var d = this.elements;
-        this.elementsLength = d.data.length;
-        this.elementsType = d.type == gl.UNSIGNED_BYTE ? d.type : gl.UNSIGNED_SHORT;
-        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.elementsVBO);
-        throwError(gl, "bindBuffer ELEMENT_ARRAY_BUFFER");
-        if (this.elementsType == gl.UNSIGNED_SHORT && !d.ushortArray) {
-          d.ushortArray = new Uint16Array(d.data);
-          gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, d.ushortArray, gl.STATIC_DRAW);
-        } else if (this.elementsType == gl.UNSIGNED_BYTE && !d.ubyteArray) {
-          d.ubyteArray = new Uint8Array(d.data);
-          gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, d.ubyteArray, gl.STATIC_DRAW);
-        }
-        throwError(gl, "bufferData ELEMENT_ARRAY_BUFFER");
-      }
-    } catch(e) {
-      for (var i=0; i<vbos.length; i++)
-        gl.deleteBuffer(vbos[i]);
-      throw(e);
-    }
-
-    gl.bindBuffer(gl.ARRAY_BUFFER, null);
-    gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
-
-    this.length = length;
-    this.vbos = vbos;
-
-    this.initialized = true;
-  },
-
-  use : function() {
-    if (!this.initialized) this.init();
-    var gl = this.gl;
-    for (var i=0; i<arguments.length; i++) {
-      if (arguments[i] == null) continue;
-      gl.bindBuffer(gl.ARRAY_BUFFER, this.vbos[i]);
-      gl.vertexAttribPointer(arguments[i], this.data[i].size, gl.FLOAT, false, 0, 0);
-      gl.enableVertexAttribArray(arguments[i]);
-    }
-    if (this.elementsVBO != null) {
-      gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.elementsVBO);
-    }
-  },
-
-  draw : function() {
-    var args = [];
-    this.use.apply(this, arguments);
-    var gl = this.gl;
-    if (this.elementsVBO != null) {
-      gl.drawElements(gl[this.type], this.elementsLength, this.elementsType, 0);
-    } else {
-      gl.drawArrays(gl[this.type], 0, this.length);
-    }
-  }
-}
-
-FBO = function(gl, width, height, use_depth) {
-  this.gl = gl;
-  this.width = width;
-  this.height = height;
-  if (use_depth != null)
-    this.useDepth = use_depth;
-}
-FBO.prototype = {
-  initialized : false,
-  useDepth : true,
-  fbo : null,
-  rbo : null,
-  texture : null,
-
-  destroy : function() {
-    if (this.fbo) this.gl.deleteFramebuffer(this.fbo);
-    if (this.rbo) this.gl.deleteRenderbuffer(this.rbo);
-    if (this.texture) this.gl.deleteTexture(this.texture);
-  },
-
-  init : function() {
-    var gl = this.gl;
-    var w = this.width, h = this.height;
-    var fbo = this.fbo != null ? this.fbo : gl.createFramebuffer();
-    var rb;
-
-    gl.bindFramebuffer(gl.FRAMEBUFFER, fbo);
-    checkError(gl, "FBO.init bindFramebuffer");
-    if (this.useDepth) {
-      rb = this.rbo != null ? this.rbo : gl.createRenderbuffer();
-      gl.bindRenderbuffer(gl.RENDERBUFFER, rb);
-      checkError(gl, "FBO.init bindRenderbuffer");
-      gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, w, h);
-      checkError(gl, "FBO.init renderbufferStorage");
-    }
-
-    var tex = this.texture != null ? this.texture : gl.createTexture();
-    gl.bindTexture(gl.TEXTURE_2D, tex);
-    try {
-      gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, w, h, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
-    } catch (e) { // argh, no null texture support
-      var tmp = this.getTempCanvas(w,h);
-      gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, tmp);
-    }
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
-    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
-    checkError(gl, "FBO.init tex");
-
-    gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, tex, 0);
-    checkError(gl, "FBO.init bind tex");
-
-    if (this.useDepth) {
-      gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT, gl.RENDERBUFFER, rb);
-      checkError(gl, "FBO.init bind depth buffer");
-    }
-
-    var fbstat = gl.checkFramebufferStatus(gl.FRAMEBUFFER);
-    if (fbstat != gl.FRAMEBUFFER_COMPLETE) {
-      var glv;
-      for (var v in gl) {
-        try { glv = gl[v]; } catch (e) { glv = null; }
-        if (glv == fbstat) { fbstat = v; break; }}
-        log("Framebuffer status: " + fbstat);
-    }
-    checkError(gl, "FBO.init check fbo");
-
-    this.fbo = fbo;
-    this.rbo = rb;
-    this.texture = tex;
-    this.initialized = true;
-  },
-
-  getTempCanvas : function(w, h) {
-    if (!FBO.tempCanvas) {
-      FBO.tempCanvas = document.createElement('canvas');
-    }
-    FBO.tempCanvas.width = w;
-    FBO.tempCanvas.height = h;
-    return FBO.tempCanvas;
-  },
-
-  use : function() {
-    if (!this.initialized) this.init();
-    this.gl.bindFramebuffer(this.gl.FRAMEBUFFER, this.fbo);
-  }
-}
-
-function GLError(err, msg, fileName, lineNumber) {
-  this.message = msg;
-  this.glError = err;
-}
-
-GLError.prototype = new Error();
-
-function makeGLErrorWrapper(gl, fname) {
-  return (function() {
-    try {
-      var rv = gl[fname].apply(gl, arguments);
-      var err = gl.getError();
-      if (err != gl.NO_ERROR) {
-        throw(new GLError(
-            err, "GL error "+getGLErrorAsString(gl, err)+" in "+fname));
-      }
-      return rv;
-    } catch (e) {
-      if (e.glError !== undefined) {
-        throw e;
-      }
-      throw(new Error("Threw " + e.name +
-                      " in " + fname + "\n" +
-                      e.message + "\n" +
-                      arguments.callee.caller));
-    }
-  });
-}
-
-function wrapGLContext(gl) {
-  var wrap = {};
-  for (var i in gl) {
-    try {
-      if (typeof gl[i] == 'function') {
-          wrap[i] = makeGLErrorWrapper(gl, i);
-      } else {
-          wrap[i] = gl[i];
-      }
-    } catch (e) {
-      // log("wrapGLContext: Error accessing " + i);
-    }
-  }
-  wrap.getError = function(){ return gl.getError(); };
-  return wrap;
-}
-
-// Assert that f generates a specific GL error.
-function assertGLError(gl, err, name, f) {
-  if (f == null) { f = name; name = null; }
-  var r = false;
-  var glErr = 0;
-  try { f(); } catch(e) { r=true; glErr = e.glError; }
-  if (glErr !== err) {
-    if (glErr === undefined) {
-      testFailed("assertGLError: UNEXPCETED EXCEPTION", name, f);
-    } else {
-      testFailed("assertGLError: expected: " + getGLErrorAsString(gl, err) +
-                 " actual: " + getGLErrorAsString(gl, glErr), name, f);
-    }
-    return false;
-  }
-  return true;
-}
-
-// Assert that f generates some GL error. Used in situations where it's
-// ambigious which of multiple possible errors will be generated.
-function assertSomeGLError(gl, name, f) {
-  if (f == null) { f = name; name = null; }
-  var r = false;
-  var glErr = 0;
-  var err = 0;
-  try { f(); } catch(e) { r=true; glErr = e.glError; }
-  if (glErr === 0) {
-    if (glErr === undefined) {
-      testFailed("assertGLError: UNEXPCETED EXCEPTION", name, f);
-    } else {
-      testFailed("assertGLError: expected: " + getGLErrorAsString(gl, err) +
-                 " actual: " + getGLErrorAsString(gl, glErr), name, f);
-    }
-    return false;
-  }
-  return true;
-}
-
-// Assert that f throws an exception but does not generate a GL error.
-function assertThrowNoGLError(gl, name, f) {
-  if (f == null) { f = name; name = null; }
-  var r = false;
-  var glErr = undefined;
-  var exp;
-  try { f(); } catch(e) { r=true; glErr = e.glError; exp = e;}
-  if (!r) {
-    testFailed(
-      "assertThrowNoGLError: should have thrown exception", name, f);
-    return false;
-  } else {
-    if (glErr !== undefined) {
-      testFailed(
-        "assertThrowNoGLError: should be no GL error but generated: " +
-        getGLErrorAsString(gl, glErr), name, f);
-      return false;
-    }
-  }
-  testPassed("assertThrowNoGLError", name, f);
-  return true;
-}
-
-Quad = {
-  vertices : [
-    -1,-1,0,
-    1,-1,0,
-    -1,1,0,
-    1,-1,0,
-    1,1,0,
-    -1,1,0
-  ],
-  normals : [
-    0,0,-1,
-    0,0,-1,
-    0,0,-1,
-    0,0,-1,
-    0,0,-1,
-    0,0,-1
-  ],
-  texcoords : [
-    0,0,
-    1,0,
-    0,1,
-    1,0,
-    1,1,
-    0,1
-  ],
-  indices : [0,1,2,1,5,2],
-  makeVBO : function(gl) {
-    return new VBO(gl,
-        {size:3, data: Quad.vertices},
-        {size:3, data: Quad.normals},
-        {size:2, data: Quad.texcoords}
-    )
-  },
-  cache: {},
-  getCachedVBO : function(gl) {
-    if (!this.cache[gl])
-      this.cache[gl] = this.makeVBO(gl);
-    return this.cache[gl];
-  }
-}
-Cube = {
-  vertices : [  0.5, -0.5,  0.5, // +X
-                0.5, -0.5, -0.5,
-                0.5,  0.5, -0.5,
-                0.5,  0.5,  0.5,
-
-                0.5,  0.5,  0.5, // +Y
-                0.5,  0.5, -0.5,
-                -0.5,  0.5, -0.5,
-                -0.5,  0.5,  0.5,
-
-                0.5,  0.5,  0.5, // +Z
-                -0.5,  0.5,  0.5,
-                -0.5, -0.5,  0.5,
-                0.5, -0.5,  0.5,
-
-                -0.5, -0.5,  0.5, // -X
-                -0.5,  0.5,  0.5,
-                -0.5,  0.5, -0.5,
-                -0.5, -0.5, -0.5,
-
-                -0.5, -0.5,  0.5, // -Y
-                -0.5, -0.5, -0.5,
-                0.5, -0.5, -0.5,
-                0.5, -0.5,  0.5,
-
-                -0.5, -0.5, -0.5, // -Z
-                -0.5,  0.5, -0.5,
-                0.5,  0.5, -0.5,
-                0.5, -0.5, -0.5,
-      ],
-
-  normals : [ 1, 0, 0,
-              1, 0, 0,
-              1, 0, 0,
-              1, 0, 0,
-
-              0, 1, 0,
-              0, 1, 0,
-              0, 1, 0,
-              0, 1, 0,
-
-              0, 0, 1,
-              0, 0, 1,
-              0, 0, 1,
-              0, 0, 1,
-
-              -1, 0, 0,
-              -1, 0, 0,
-              -1, 0, 0,
-              -1, 0, 0,
-
-              0,-1, 0,
-              0,-1, 0,
-              0,-1, 0,
-              0,-1, 0,
-
-              0, 0,-1,
-              0, 0,-1,
-              0, 0,-1,
-              0, 0,-1
-      ],
-
-  indices : [],
-  create : function(){
-    for (var i = 0; i < 6; i++) {
-      Cube.indices.push(i*4 + 0);
-      Cube.indices.push(i*4 + 1);
-      Cube.indices.push(i*4 + 3);
-      Cube.indices.push(i*4 + 1);
-      Cube.indices.push(i*4 + 2);
-      Cube.indices.push(i*4 + 3);
-    }
-  },
-
-  makeVBO : function(gl) {
-    return new VBO(gl,
-        {size:3, data: Cube.vertices},
-        {size:3, data: Cube.normals},
-        {elements: true, data: Cube.indices}
-    )
-  },
-  cache : {},
-  getCachedVBO : function(gl) {
-    if (!this.cache[gl])
-      this.cache[gl] = this.makeVBO(gl);
-    return this.cache[gl];
-  }
-}
-Cube.create();
-
-Sphere = {
-  vertices : [],
-  normals : [],
-  indices : [],
-  create : function(){
-    var r = 0.75;
-    function vert(theta, phi)
-    {
-      var r = 0.75;
-      var x, y, z, nx, ny, nz;
-
-      nx = Math.sin(theta) * Math.cos(phi);
-      ny = Math.sin(phi);
-      nz = Math.cos(theta) * Math.cos(phi);
-      Sphere.normals.push(nx);
-      Sphere.normals.push(ny);
-      Sphere.normals.push(nz);
-
-      x = r * Math.sin(theta) * Math.cos(phi);
-      y = r * Math.sin(phi);
-      z = r * Math.cos(theta) * Math.cos(phi);
-      Sphere.vertices.push(x);
-      Sphere.vertices.push(y);
-      Sphere.vertices.push(z);
-    }
-    for (var phi = -Math.PI/2; phi < Math.PI/2; phi += Math.PI/20) {
-      var phi2 = phi + Math.PI/20;
-      for (var theta = -Math.PI/2; theta <= Math.PI/2; theta += Math.PI/20) {
-        vert(theta, phi);
-        vert(theta, phi2);
-      }
-    }
-  }
-}
-
-Sphere.create();
-
-initGL_CONTEXT_ID = function(){
-  var c = document.createElement('canvas');
-  var contextNames = ['webgl', 'experimental-webgl'];
-  GL_CONTEXT_ID = null;
-  for (var i=0; i<contextNames.length; i++) {
-    try {
-      if (c.getContext(contextNames[i])) {
-        GL_CONTEXT_ID = contextNames[i];
-        break;
-      }
-    } catch (e) {}
-  }
-  if (!GL_CONTEXT_ID) {
-    log("No WebGL context found. Unable to run tests.");
-  }
-}
-
-initGL_CONTEXT_ID();