Check in webgl conformance tests r16844 from khronos.

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

+/*
+  QuickCheck tests for WebGL:
+
+    1. Write a valid arg generator for each function
+      1.1. Write valid arg predicates to use with random generator:
+            if value passes generator, accept it as valid.
+      1.2. Often needs initializing and cleanup:
+            setup - generate - cleanup
+            gl.createBuffer - test(bindBufferGenerator) - gl.deleteBuffer
+
+    2. Write an invalid arg generator
+      2.1. Take valid args, modify an arg until the args no longer pass
+            checkArgValidity.
+      2.2. Repeat for all args.
+
+    3. Test functions using the generators
+      3.1. Args generated with the valid arg generator should pass
+            assertOk(f(args))
+      3.2. Args generated with the invalid arg generator should pass
+            assertFail(f(args))
+*/
+var GLcanvas = document.createElement('canvas');
+var canvas2D = document.createElement('canvas');
+GLcanvas.width = GLcanvas.height = 256;
+GL = GLcanvas.getContext(GL_CONTEXT_ID);
+Array.from = function(o) {
+  var a = [];
+  for (var i=0; i<o.length; i++)
+    a.push(o[i]);
+  return a;
+}
+Array.prototype.has = function(v) { return this.indexOf(v) != -1; }
+Array.prototype.random = function() { return this[randomInt(this.length)]; }
+
+castToInt = function(o) {
+  if (typeof o == 'number')
+    return isNaN(o) ? 0 : Math.floor(o);
+  if (o == true) return 1;
+  return 0;
+};
+
+// Creates a constant checker / generator from its arguments.
+//
+// E.g. if you want a constant checker for the constants 1, 2, and 3, you
+// would do the following:
+//
+//   var cc = constCheck(1,2,3);
+//   var randomConst = cc.random();
+//   if (cc.has(randomConst))
+//     console.log("randomConst is included in cc's constants");
+//
+constCheck = function() {
+  var a = Array.from(arguments);
+  a.has = function(v) { return this.indexOf(castToInt(v)) != -1; };
+  return a;
+}
+
+bindTextureTarget = constCheck(GL.TEXTURE_2D, GL.TEXTURE_CUBE_MAP);
+blendEquationMode = constCheck(GL.FUNC_ADD, GL.FUNC_SUBTRACT, GL.FUNC_REVERSE_SUBTRACT);
+blendFuncSfactor = constCheck(
+  GL.ZERO, GL.ONE, GL.SRC_COLOR, GL.ONE_MINUS_SRC_COLOR, GL.DST_COLOR,
+  GL.ONE_MINUS_DST_COLOR, GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA, GL.DST_ALPHA,
+  GL.ONE_MINUS_DST_ALPHA, GL.CONSTANT_COLOR, GL.ONE_MINUS_CONSTANT_COLOR,
+  GL.CONSTANT_ALPHA, GL.ONE_MINUS_CONSTANT_ALPHA, GL.SRC_ALPHA_SATURATE
+);
+blendFuncDfactor = constCheck(
+  GL.ZERO, GL.ONE, GL.SRC_COLOR, GL.ONE_MINUS_SRC_COLOR, GL.DST_COLOR,
+  GL.ONE_MINUS_DST_COLOR, GL.SRC_ALPHA, GL.ONE_MINUS_SRC_ALPHA, GL.DST_ALPHA,
+  GL.ONE_MINUS_DST_ALPHA, GL.CONSTANT_COLOR, GL.ONE_MINUS_CONSTANT_COLOR,
+  GL.CONSTANT_ALPHA, GL.ONE_MINUS_CONSTANT_ALPHA
+);
+bufferTarget = constCheck(GL.ARRAY_BUFFER, GL.ELEMENT_ARRAY_BUFFER);
+bufferMode = constCheck(GL.STREAM_DRAW, GL.STATIC_DRAW, GL.DYNAMIC_DRAW);
+clearMask = constCheck(
+  GL.COLOR_BUFFER_BIT | GL.DEPTH_BUFFER_BIT | GL.STENCIL_BUFFER_BIT,
+  GL.COLOR_BUFFER_BIT | GL.DEPTH_BUFFER_BIT,
+  GL.COLOR_BUFFER_BIT | GL.STENCIL_BUFFER_BIT,
+  GL.DEPTH_BUFFER_BIT | GL.STENCIL_BUFFER_BIT,
+  GL.COLOR_BUFFER_BIT, GL.DEPTH_BUFFER_BIT, GL.STENCIL_BUFFER_BIT, 0
+);
+cullFace = constCheck(GL.FRONT, GL.BACK, GL.FRONT_AND_BACK);
+depthFuncFunc = constCheck(
+  GL.NEVER, GL.LESS, GL.EQUAL, GL.LEQUAL, GL.GREATER, GL.NOTEQUAL,
+  GL.GEQUAL, GL.ALWAYS
+);
+stencilFuncFunc = depthFuncFunc;
+enableCap = constCheck(
+  GL.BLEND, GL.CULL_FACE, GL.DEPTH_TEST, GL.DITHER, GL.POLYGON_OFFSET_FILL,
+  GL.SAMPLE_ALPHA_TO_COVERAGE, GL.SAMPLE_COVERAGE, GL.SCISSOR_TEST,
+  GL.STENCIL_TEST
+);
+frontFaceMode = constCheck(GL.CCW, GL.CW);
+getParameterPname = constCheck(
+  GL.ACTIVE_TEXTURE || "GL.ACTIVE_TEXTURE",
+  GL.ALIASED_LINE_WIDTH_RANGE || "GL.ALIASED_LINE_WIDTH_RANGE",
+  GL.ALIASED_POINT_SIZE_RANGE || "GL.ALIASED_POINT_SIZE_RANGE",
+  GL.ALPHA_BITS || "GL.ALPHA_BITS",
+  GL.ARRAY_BUFFER_BINDING || "GL.ARRAY_BUFFER_BINDING",
+  GL.BLEND || "GL.BLEND",
+  GL.BLEND_COLOR || "GL.BLEND_COLOR",
+  GL.BLEND_DST_ALPHA || "GL.BLEND_DST_ALPHA",
+  GL.BLEND_DST_RGB || "GL.BLEND_DST_RGB",
+  GL.BLEND_EQUATION_ALPHA || "GL.BLEND_EQUATION_ALPHA",
+  GL.BLEND_EQUATION_RGB || "GL.BLEND_EQUATION_RGB",
+  GL.BLEND_SRC_ALPHA || "GL.BLEND_SRC_ALPHA",
+  GL.BLEND_SRC_RGB || "GL.BLEND_SRC_RGB",
+  GL.BLUE_BITS || "GL.BLUE_BITS",
+  GL.COLOR_CLEAR_VALUE || "GL.COLOR_CLEAR_VALUE",
+  GL.COLOR_WRITEMASK || "GL.COLOR_WRITEMASK",
+  GL.COMPRESSED_TEXTURE_FORMATS || "GL.COMPRESSED_TEXTURE_FORMATS",
+  GL.CULL_FACE || "GL.CULL_FACE",
+  GL.CULL_FACE_MODE || "GL.CULL_FACE_MODE",
+  GL.CURRENT_PROGRAM || "GL.CURRENT_PROGRAM",
+  GL.DEPTH_BITS || "GL.DEPTH_BITS",
+  GL.DEPTH_CLEAR_VALUE || "GL.DEPTH_CLEAR_VALUE",
+  GL.DEPTH_FUNC || "GL.DEPTH_FUNC",
+  GL.DEPTH_RANGE || "GL.DEPTH_RANGE",
+  GL.DEPTH_TEST || "GL.DEPTH_TEST",
+  GL.DEPTH_WRITEMASK || "GL.DEPTH_WRITEMASK",
+  GL.DITHER || "GL.DITHER",
+  GL.ELEMENT_ARRAY_BUFFER_BINDING || "GL.ELEMENT_ARRAY_BUFFER_BINDING",
+  GL.FRAMEBUFFER_BINDING || "GL.FRAMEBUFFER_BINDING",
+  GL.FRONT_FACE || "GL.FRONT_FACE",
+  GL.GENERATE_MIPMAP_HINT || "GL.GENERATE_MIPMAP_HINT",
+  GL.GREEN_BITS || "GL.GREEN_BITS",
+  GL.LINE_WIDTH || "GL.LINE_WIDTH",
+  GL.MAX_COMBINED_TEXTURE_IMAGE_UNITS || "GL.MAX_COMBINED_TEXTURE_IMAGE_UNITS",
+  GL.MAX_CUBE_MAP_TEXTURE_SIZE || "GL.MAX_CUBE_MAP_TEXTURE_SIZE",
+  GL.MAX_FRAGMENT_UNIFORM_VECTORS || "GL.MAX_FRAGMENT_UNIFORM_VECTORS",
+  GL.MAX_RENDERBUFFER_SIZE || "GL.MAX_RENDERBUFFER_SIZE",
+  GL.MAX_TEXTURE_IMAGE_UNITS || "GL.MAX_TEXTURE_IMAGE_UNITS",
+  GL.MAX_TEXTURE_SIZE || "GL.MAX_TEXTURE_SIZE",
+  GL.MAX_VARYING_VECTORS || "GL.MAX_VARYING_VECTORS",
+  GL.MAX_VERTEX_ATTRIBS || "GL.MAX_VERTEX_ATTRIBS",
+  GL.MAX_VERTEX_TEXTURE_IMAGE_UNITS || "GL.MAX_VERTEX_TEXTURE_IMAGE_UNITS",
+  GL.MAX_VERTEX_UNIFORM_VECTORS || "GL.MAX_VERTEX_UNIFORM_VECTORS",
+  GL.MAX_VIEWPORT_DIMS || "GL.MAX_VIEWPORT_DIMS",
+  GL.PACK_ALIGNMENT || "GL.PACK_ALIGNMENT",
+  GL.POLYGON_OFFSET_FACTOR || "GL.POLYGON_OFFSET_FACTOR",
+  GL.POLYGON_OFFSET_FILL || "GL.POLYGON_OFFSET_FILL",
+  GL.POLYGON_OFFSET_UNITS || "GL.POLYGON_OFFSET_UNITS",
+  GL.RED_BITS || "GL.RED_BITS",
+  GL.RENDERBUFFER_BINDING || "GL.RENDERBUFFER_BINDING",
+  GL.SAMPLE_BUFFERS || "GL.SAMPLE_BUFFERS",
+  GL.SAMPLE_COVERAGE_INVERT || "GL.SAMPLE_COVERAGE_INVERT",
+  GL.SAMPLE_COVERAGE_VALUE || "GL.SAMPLE_COVERAGE_VALUE",
+  GL.SAMPLES || "GL.SAMPLES",
+  GL.SCISSOR_BOX || "GL.SCISSOR_BOX",
+  GL.SCISSOR_TEST || "GL.SCISSOR_TEST",
+  GL.STENCIL_BACK_FAIL || "GL.STENCIL_BACK_FAIL",
+  GL.STENCIL_BACK_FUNC || "GL.STENCIL_BACK_FUNC",
+  GL.STENCIL_BACK_PASS_DEPTH_FAIL || "GL.STENCIL_BACK_PASS_DEPTH_FAIL",
+  GL.STENCIL_BACK_PASS_DEPTH_PASS || "GL.STENCIL_BACK_PASS_DEPTH_PASS",
+  GL.STENCIL_BACK_REF || "GL.STENCIL_BACK_REF",
+  GL.STENCIL_BACK_VALUE_MASK || "GL.STENCIL_BACK_VALUE_MASK",
+  GL.STENCIL_BACK_WRITEMASK || "GL.STENCIL_BACK_WRITEMASK",
+  GL.STENCIL_BITS || "GL.STENCIL_BITS",
+  GL.STENCIL_CLEAR_VALUE || "GL.STENCIL_CLEAR_VALUE",
+  GL.STENCIL_FAIL || "GL.STENCIL_FAIL",
+  GL.STENCIL_FUNC || "GL.STENCIL_FUNC",
+  GL.STENCIL_PASS_DEPTH_FAIL || "GL.STENCIL_PASS_DEPTH_FAIL",
+  GL.STENCIL_PASS_DEPTH_PASS || "GL.STENCIL_PASS_DEPTH_PASS",
+  GL.STENCIL_REF || "GL.STENCIL_REF",
+  GL.STENCIL_TEST || "GL.STENCIL_TEST",
+  GL.STENCIL_VALUE_MASK || "GL.STENCIL_VALUE_MASK",
+  GL.STENCIL_WRITEMASK || "GL.STENCIL_WRITEMASK",
+  GL.SUBPIXEL_BITS || "GL.SUBPIXEL_BITS",
+  GL.TEXTURE_BINDING_2D || "GL.TEXTURE_BINDING_2D",
+  GL.TEXTURE_BINDING_CUBE_MAP || "GL.TEXTURE_BINDING_CUBE_MAP",
+  GL.UNPACK_ALIGNMENT || "GL.UNPACK_ALIGNMENT",
+  GL.VIEWPORT || "GL.VIEWPORT"
+);
+mipmapHint = constCheck(GL.FASTEST, GL.NICEST, GL.DONT_CARE);
+pixelStoreiPname = constCheck(GL.PACK_ALIGNMENT, GL.UNPACK_ALIGNMENT);
+pixelStoreiParam = constCheck(1,2,4,8);
+shaderType = constCheck(GL.VERTEX_SHADER, GL.FRAGMENT_SHADER);
+stencilOp = constCheck(GL.KEEP, GL.ZERO, GL.REPLACE, GL.INCR, GL.INCR_WRAP,
+                        GL.DECR, GL.DECR_WRAP, GL.INVERT);
+texImageTarget = constCheck(
+  GL.TEXTURE_2D,
+  GL.TEXTURE_CUBE_MAP_POSITIVE_X,
+  GL.TEXTURE_CUBE_MAP_NEGATIVE_X,
+  GL.TEXTURE_CUBE_MAP_POSITIVE_Y,
+  GL.TEXTURE_CUBE_MAP_NEGATIVE_Y,
+  GL.TEXTURE_CUBE_MAP_POSITIVE_Z,
+  GL.TEXTURE_CUBE_MAP_NEGATIVE_Z
+);
+texImageInternalFormat = constCheck(
+  GL.ALPHA,
+  GL.LUMINANCE,
+  GL.LUMINANCE_ALPHA,
+  GL.RGB,
+  GL.RGBA
+);
+texImageFormat = constCheck(
+  GL.ALPHA,
+  GL.LUMINANCE,
+  GL.LUMINANCE_ALPHA,
+  GL.RGB,
+  GL.RGBA
+);
+texImageType = constCheck(GL.UNSIGNED_BYTE);
+texParameterPname = constCheck(
+  GL.TEXTURE_MIN_FILTER, GL.TEXTURE_MAG_FILTER,
+  GL.TEXTURE_WRAP_S, GL.TEXTURE_WRAP_T);
+texParameterParam = {};
+texParameterParam[GL.TEXTURE_MIN_FILTER] = constCheck(
+  GL.NEAREST, GL.LINEAR, GL.NEAREST_MIPMAP_NEAREST, GL.LINEAR_MIPMAP_NEAREST,
+  GL.NEAREST_MIPMAP_LINEAR, GL.LINEAR_MIPMAP_LINEAR);
+texParameterParam[GL.TEXTURE_MAG_FILTER] = constCheck(GL.NEAREST, GL.LINEAR);
+texParameterParam[GL.TEXTURE_WRAP_S] = constCheck(
+  GL.CLAMP_TO_EDGE, GL.MIRRORED_REPEAT, GL.REPEAT);
+texParameterParam[GL.TEXTURE_WRAP_T] = texParameterParam[GL.TEXTURE_WRAP_S];
+textureUnit = constCheck.apply(this, (function(){
+  var textureUnits = [];
+  var texUnits = GL.getParameter(GL.MAX_TEXTURE_IMAGE_UNITS);
+  for (var i=0; i<texUnits; i++) textureUnits.push(GL['TEXTURE'+i]);
+  return textureUnits;
+})());
+
+var StencilBits = GL.getParameter(GL.STENCIL_BITS);
+var MaxStencilValue = 1 << StencilBits;
+
+var MaxVertexAttribs = GL.getParameter(GL.MAX_VERTEX_ATTRIBS);
+var LineWidthRange = GL.getParameter(GL.ALIASED_LINE_WIDTH_RANGE);
+
+// Returns true if bufData can be passed to GL.bufferData
+isBufferData = function(bufData) {
+  if (typeof bufData == 'number')
+    return bufData >= 0;
+  if (bufData instanceof ArrayBuffer)
+    return true;
+  return WebGLArrayTypes.some(function(t) {
+    return bufData instanceof t;
+  });
+};
+
+isVertexAttribute = function(idx) {
+  if (typeof idx != 'number') return false;
+  return idx >= 0 && idx < MaxVertexAttribs;
+};
+
+isValidName = function(name) {
+  if (typeof name != 'string') return false;
+  for (var i=0; i<name.length; i++) {
+    var c = name.charCodeAt(i);
+    if (c & 0x00FF == 0 || c & 0xFF00 == 0) {
+      return false;
+    }
+  }
+  return true;
+};
+
+WebGLArrayTypes = [
+  Float32Array,
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array
+];
+webGLArrayContentGenerators = [randomLength, randomSmallIntArray];
+randomWebGLArray = function() {
+  var t = WebGLArrayTypes.random();
+  return new t(webGLArrayContentGenerators.random()());
+};
+
+randomArrayBuffer = function(buflen) {
+  if (buflen == null) buflen = 256;
+  var len = randomInt(buflen)+1;
+  var rv;
+  try {
+    rv = new ArrayBuffer(len);
+  } catch(e) {
+    log("Error creating ArrayBuffer with length " + len);
+    throw(e);
+  }
+  return rv;
+};
+
+bufferDataGenerators = [randomLength, randomWebGLArray, randomArrayBuffer];
+randomBufferData = function() {
+  return bufferDataGenerators.random()();
+};
+
+randomSmallWebGLArray = function(buflen) {
+  var t = WebGLArrayTypes.random();
+  return new t(randomInt(buflen/4)+1);
+};
+
+bufferSubDataGenerators = [randomSmallWebGLArray, randomArrayBuffer];
+randomBufferSubData = function(buflen) {
+  var data = bufferSubDataGenerators.random()(buflen);
+  var offset = randomInt(buflen - data.byteLength);
+  return {data:data, offset:offset};
+};
+
+randomColor = function() {
+  return [Math.random(), Math.random(), Math.random(), Math.random()];
+};
+
+randomName = function() {
+  var arr = [];
+  var len = randomLength()+1;
+  for (var i=0; i<len; i++) {
+    var l = randomInt(255)+1;
+    var h = randomInt(255)+1;
+    var c = (h << 8) | l;
+    arr.push(String.fromCharCode(c));
+  }
+  return arr.join('');
+};
+randomVertexAttribute = function() {
+  return randomInt(MaxVertexAttribs);
+};
+
+randomBool = function() { return Math.random() > 0.5; };
+
+randomStencil = function() {
+  return randomInt(MaxStencilValue);
+};
+
+randomLineWidth = function() {
+  var lo = LineWidthRange[0],
+      hi = LineWidthRange[1];
+  return randomFloatFromRange(lo, hi);
+};
+
+randomImage = function(w,h) {
+  var img;
+  var r = Math.random();
+  if (r < 0.5) {
+    img = document.createElement('canvas');
+    img.width = w; img.height = h;
+    img.getContext('2d').fillRect(0,0,w,h);
+  } else if (r < 0.5) {
+    img = document.createElement('video');
+    img.width = w; img.height = h;
+  } else if (r < 0.75) {
+    img = document.createElement('img');
+    img.width = w; img.height = h;
+  } else {
+    img = canvas2D.getContext('2d').createImageData(w,h);
+  }
+  return img
+};
+
+mutateArgs = function(args) {
+  var mutateCount = randomIntFromRange(1, args.length);
+  var newArgs = Array.from(args);
+  for (var i=0; i<mutateCount; i++) {
+    var idx = randomInt(args.length);
+    newArgs[idx] = generateRandomArg(idx, args.length);
+  }
+  return newArgs;
+};
+
+// Calls testFunction numberOfTests times with arguments generated by
+// argGen.generate() (or empty arguments if no generate present).
+//
+// The arguments testFunction is called with are the generated args,
+// the argGen, and what argGen.setup() returned or [] if argGen has not setup
+// method. I.e. testFunction(generatedArgs, argGen, setupVars).
+//
+argGeneratorTestRunner = function(argGen, testFunction, numberOfTests) {
+  // do argument generator setup if needed
+  var setupVars = argGen.setup ? argGen.setup() : [];
+  var error;
+  for (var i=0; i<numberOfTests; i++) {
+    var failed = false;
+    // generate arguments if argGen has a generate method
+    var generatedArgs = argGen.generate ? argGen.generate.apply(argGen, setupVars) : [];
+    try {
+      // call testFunction with the generated args
+      testFunction.call(this, generatedArgs, argGen, setupVars);
+    } catch (e) {
+      failed = true;
+      error = e;
+    }
+    // if argGen needs cleanup for generated args, do it here
+    if (argGen.cleanup)
+      argGen.cleanup.apply(argGen, generatedArgs);
+    if (failed) break;
+  }
+  // if argGen needs to do a final cleanup for setupVars, do it here
+  if (argGen.teardown)
+    argGen.teardown.apply(argGen, setupVars);
+  if (error) throw(error);
+}