//----------------------------------------------------------------------
// Differences with respect to Khronos version of webgl-test.js
function assertMsg(assertion, msg) {
if (assertion) {
testPassed(msg);
} else {
testFailed(msg);
}
}
function initNonKhronosFramework(waitUntilDone) {
if (window.testRunner) {
testRunner.dumpAsText();
if (waitUntilDone) {
window.jsTestIsAsync = true;
testRunner.waitUntilDone();
}
}
}
function nonKhronosFrameworkNotifyDone() {
if (window.testRunner) {
testRunner.notifyDone();
}
}
function finishTest() {
finishJSTest();
}
//
//----------------------------------------------------------------------
function webglTestLog(msg) {
if (window.console && window.console.log) {
window.console.log(msg);
}
if (document.getElementById("console")) {
var log = document.getElementById("console");
log.innerHTML += msg + "<br>";
}
}
//
// create3DContext
//
// Returns the WebGLRenderingContext for any known implementation.
//
function create3DContext(canvas, attributes)
{
if (!canvas)
canvas = document.createElement("canvas");
var context = null;
try {
context = canvas.getContext("webgl", attributes);
} catch(e) {}
if (!context) {
try {
context = canvas.getContext("webkit-3d", attributes);
} catch(e) {}
}
if (!context) {
try {
context = canvas.getContext("moz-webgl", attributes);
} catch(e) {}
}
if (!context) {
throw "Unable to fetch WebGL rendering context for Canvas";
}
return context;
}
function createGLErrorWrapper(context, fname) {
return function() {
var rv = context[fname].apply(context, arguments);
var err = context.getError();
if (err != 0)
throw "GL error " + err + " in " + fname;
return rv;
};
}
function create3DContextWithWrapperThatThrowsOnGLError(canvas, attributes) {
var context = create3DContext(canvas, attributes);
// Thanks to Ilmari Heikkinen for the idea on how to implement this so elegantly.
var wrap = {};
for (var i in context) {
try {
if (typeof context[i] == 'function') {
wrap[i] = createGLErrorWrapper(context, i);
} else {
wrap[i] = context[i];
}
} catch (e) {
webglTestLog("createContextWrapperThatThrowsOnGLError: Error accessing " + i);
}
}
wrap.getError = function() {
return context.getError();
};
return wrap;
}
function getGLErrorAsString(ctx, err) {
if (err === ctx.NO_ERROR) {
return "NO_ERROR";
}
for (var name in ctx) {
if (ctx[name] === err) {
return name;
}
}
return "0x" + err.toString(16);
}
// Pass undefined for glError to test that it at least throws some error
function shouldGenerateGLError(ctx, glErrors, evalStr) {
if (!glErrors.length) {
glErrors = [glErrors];
}
var exception;
try {
eval(evalStr);
} catch (e) {
exception = e;
}
if (exception) {
testFailed(evalStr + " threw exception " + exception);
} else {
var err = ctx.getError();
var errStrs = [];
for (var ii = 0; ii < glErrors.length; ++ii) {
errStrs.push(getGLErrorAsString(ctx, glErrors[ii]));
}
var expected = errStrs.join(" or ");
if (glErrors.indexOf(err) < 0) {
testFailed(evalStr + " expected: " + expected + ". Was " + getGLErrorAsString(ctx, err) + ".");
} else {
var msg = (glErrors.length == 1) ? " generated expected GL error: " :
" generated one of expected GL errors: ";
testPassed(evalStr + msg + expected + ".");
}
}
}
/**
* Tests that the first error GL returns is the specified error.
* @param {!WebGLContext} gl The WebGLContext to use.
* @param {number|!Array.<number>} glError The expected gl
* error. Multiple errors can be passed in using an
* array.
* @param {string} opt_msg Optional additional message.
*/
function glErrorShouldBe(gl, glErrors, opt_msg) {
if (!glErrors.length) {
glErrors = [glErrors];
}
opt_msg = opt_msg || "";
var err = gl.getError();
var ndx = glErrors.indexOf(err);
var errStrs = [];
for (var ii = 0; ii < glErrors.length; ++ii) {
errStrs.push(getGLErrorAsString(gl, glErrors[ii]));
}
var expected = errStrs.join(" or ");
if (ndx < 0) {
var msg = "getError expected" + ((glErrors.length > 1) ? " one of: " : ": ");
testFailed(msg + expected + ". Was " + getGLErrorAsString(gl, err) + " : " + opt_msg);
} else {
var msg = "getError was " + ((glErrors.length > 1) ? "one of: " : "expected value: ");
testPassed(msg + expected + " : " + opt_msg);
}
};
//
// createProgram
//
// Create and return a program object, attaching each of the given shaders.
//
// If attribs are given, bind an attrib with that name at that index.
//
function createProgram(gl, vshaders, fshaders, attribs)
{
if (typeof(vshaders) == "string")
vshaders = [vshaders];
if (typeof(fshaders) == "string")
fshaders = [fshaders];
var shaders = [];
var i;
for (i = 0; i < vshaders.length; ++i) {
var shader = loadShader(gl, vshaders[i], gl.VERTEX_SHADER);
if (!shader)
return null;
shaders.push(shader);
}
for (i = 0; i < fshaders.length; ++i) {
var shader = loadShader(gl, fshaders[i], gl.FRAGMENT_SHADER);
if (!shader)
return null;
shaders.push(shader);
}
var prog = gl.createProgram();
for (i = 0; i < shaders.length; ++i) {
gl.attachShader(prog, shaders[i]);
}
if (attribs) {
for (var i in attribs) {
gl.bindAttribLocation (prog, parseInt(i), attribs[i]);
}
}
gl.linkProgram(prog);
// Check the link status
var linked = gl.getProgramParameter(prog, gl.LINK_STATUS);
if (!linked) {
// something went wrong with the link
var error = gl.getProgramInfoLog(prog);
webglTestLog("Error in program linking:" + error);
gl.deleteProgram(prog);
for (i = 0; i < shaders.length; ++i)
gl.deleteShader(shaders[i]);
return null;
}
return prog;
}
//
// initWebGL
//
// Initialize the Canvas element with the passed name as a WebGL object and return the
// WebGLRenderingContext.
//
// Load shaders with the passed names and create a program with them. Return this program
// in the 'program' property of the returned context.
//
// For each string in the passed attribs array, bind an attrib with that name at that index.
// Once the attribs are bound, link the program and then use it.
//
// Set the clear color to the passed array (4 values) and set the clear depth to the passed value.
// Enable depth testing and blending with a blend func of (SRC_ALPHA, ONE_MINUS_SRC_ALPHA)
//
function initWebGL(canvasName, vshader, fshader, attribs, clearColor, clearDepth, contextAttribs)
{
var canvas = document.getElementById(canvasName);
var gl = create3DContext(canvas, contextAttribs);
if (!gl) {
alert("No WebGL context found");
return null;
}
// Create the program object
gl.program = createProgram(gl, vshader, fshader, attribs);
if (!gl.program)
return null;
gl.useProgram(gl.program);
gl.clearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
gl.clearDepth(clearDepth);
gl.enable(gl.DEPTH_TEST);
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
return gl;
}
//
// getShaderSource
//
// Load the source from the passed shader file.
//
function getShaderSource(file)
{
var xhr = new XMLHttpRequest();
xhr.open("GET", file, false);
xhr.send();
return xhr.responseText;
}
//
// loadShader
//
// 'shader' is either the id of a <script> element containing the shader source
// string, the shader string itself, or the URL of a file containing the shader
// source. Load this shader and return the WebGLShader object corresponding to
// it.
//
function loadShader(ctx, shaderId, shaderType, isFile)
{
var shaderSource = "";
if (isFile)
shaderSource = getShaderSource(shaderId);
else {
var shaderScript = document.getElementById(shaderId);
if (!shaderScript) {
shaderSource = shaderId;
} else {
if (shaderScript.type == "x-shader/x-vertex") {
shaderType = ctx.VERTEX_SHADER;
} else if (shaderScript.type == "x-shader/x-fragment") {
shaderType = ctx.FRAGMENT_SHADER;
} else if (shaderType != ctx.VERTEX_SHADER && shaderType != ctx.FRAGMENT_SHADER) {
webglTestLog("*** Error: unknown shader type");
return null;
}
shaderSource = shaderScript.text;
}
}
// Create the shader object
var shader = ctx.createShader(shaderType);
if (shader == null) {
webglTestLog("*** Error: unable to create shader '"+shaderId+"'");
return null;
}
// Load the shader source
ctx.shaderSource(shader, shaderSource);
// Compile the shader
ctx.compileShader(shader);
// Check the compile status
var compiled = ctx.getShaderParameter(shader, ctx.COMPILE_STATUS);
if (!compiled) {
// Something went wrong during compilation; get the error
var error = ctx.getShaderInfoLog(shader);
webglTestLog("*** Error compiling shader '"+shader+"':"+error);
ctx.deleteShader(shader);
return null;
}
return shader;
}
function loadShaderFromFile(ctx, file, type)
{
return loadShader(ctx, file, type, true);
}
function loadShaderFromScript(ctx, script)
{
return loadShader(ctx, script, 0, false);
}
function loadStandardProgram(context) {
var program = context.createProgram();
context.attachShader(program, loadStandardVertexShader(context));
context.attachShader(program, loadStandardFragmentShader(context));
context.linkProgram(program);
return program;
}
function loadProgram(context, vertexShaderPath, fragmentShaderPath, isFile) {
isFile = (isFile === undefined) ? true : isFile;
var program = context.createProgram();
context.attachShader(program, loadShader(context, vertexShaderPath, context.VERTEX_SHADER, isFile));
context.attachShader(program, loadShader(context, fragmentShaderPath, context.FRAGMENT_SHADER, isFile));
context.linkProgram(program);
return program;
}
function loadStandardVertexShader(context) {
return loadShader(context, "resources/vertexShader.vert", context.VERTEX_SHADER, true);
}
function loadStandardFragmentShader(context) {
return loadShader(context, "resources/fragmentShader.frag", context.FRAGMENT_SHADER, true);
}
//
// makeBox
//
// Create a box with vertices, normals and texCoords. Create VBOs for each as well as the index array.
// Return an object with the following properties:
//
// normalObject WebGLBuffer object for normals
// texCoordObject WebGLBuffer object for texCoords
// vertexObject WebGLBuffer object for vertices
// indexObject WebGLBuffer object for indices
// numIndices The number of indices in the indexObject
//
function makeBox(ctx)
{
// box
// v6----- v5
// /| /|
// v1------v0|
// | | | |
// | |v7---|-|v4
// |/ |/
// v2------v3
//
// vertex coords array
var vertices = new Float32Array(
[ 1, 1, 1, -1, 1, 1, -1,-1, 1, 1,-1, 1, // v0-v1-v2-v3 front
1, 1, 1, 1,-1, 1, 1,-1,-1, 1, 1,-1, // v0-v3-v4-v5 right
1, 1, 1, 1, 1,-1, -1, 1,-1, -1, 1, 1, // v0-v5-v6-v1 top
-1, 1, 1, -1, 1,-1, -1,-1,-1, -1,-1, 1, // v1-v6-v7-v2 left
-1,-1,-1, 1,-1,-1, 1,-1, 1, -1,-1, 1, // v7-v4-v3-v2 bottom
1,-1,-1, -1,-1,-1, -1, 1,-1, 1, 1,-1 ] // v4-v7-v6-v5 back
);
// normal array
var normals = new Float32Array(
[ 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, // v0-v1-v2-v3 front
1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, // v0-v3-v4-v5 right
0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, // v0-v5-v6-v1 top
-1, 0, 0, -1, 0, 0, -1, 0, 0, -1, 0, 0, // v1-v6-v7-v2 left
0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1, 0, // v7-v4-v3-v2 bottom
0, 0,-1, 0, 0,-1, 0, 0,-1, 0, 0,-1 ] // v4-v7-v6-v5 back
);
// texCoord array
var texCoords = new Float32Array(
[ 1, 1, 0, 1, 0, 0, 1, 0, // v0-v1-v2-v3 front
0, 1, 0, 0, 1, 0, 1, 1, // v0-v3-v4-v5 right
1, 0, 1, 1, 0, 1, 0, 0, // v0-v5-v6-v1 top
1, 1, 0, 1, 0, 0, 1, 0, // v1-v6-v7-v2 left
0, 0, 1, 0, 1, 1, 0, 1, // v7-v4-v3-v2 bottom
0, 0, 1, 0, 1, 1, 0, 1 ] // v4-v7-v6-v5 back
);
// index array
var indices = new Uint8Array(
[ 0, 1, 2, 0, 2, 3, // front
4, 5, 6, 4, 6, 7, // right
8, 9,10, 8,10,11, // top
12,13,14, 12,14,15, // left
16,17,18, 16,18,19, // bottom
20,21,22, 20,22,23 ] // back
);
var retval = { };
retval.normalObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.normalObject);
ctx.bufferData(ctx.ARRAY_BUFFER, normals, ctx.STATIC_DRAW);
retval.texCoordObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.texCoordObject);
ctx.bufferData(ctx.ARRAY_BUFFER, texCoords, ctx.STATIC_DRAW);
retval.vertexObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.vertexObject);
ctx.bufferData(ctx.ARRAY_BUFFER, vertices, ctx.STATIC_DRAW);
ctx.bindBuffer(ctx.ARRAY_BUFFER, 0);
retval.indexObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, retval.indexObject);
ctx.bufferData(ctx.ELEMENT_ARRAY_BUFFER, indices, ctx.STATIC_DRAW);
ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, 0);
retval.numIndices = indices.length;
return retval;
}
//
// makeSphere
//
// Create a sphere with the passed number of latitude and longitude bands and the passed radius.
// Sphere has vertices, normals and texCoords. Create VBOs for each as well as the index array.
// Return an object with the following properties:
//
// normalObject WebGLBuffer object for normals
// texCoordObject WebGLBuffer object for texCoords
// vertexObject WebGLBuffer object for vertices
// indexObject WebGLBuffer object for indices
// numIndices The number of indices in the indexObject
//
function makeSphere(ctx, radius, lats, longs)
{
var geometryData = [ ];
var normalData = [ ];
var texCoordData = [ ];
var indexData = [ ];
for (var latNumber = 0; latNumber <= lats; ++latNumber) {
for (var longNumber = 0; longNumber <= longs; ++longNumber) {
var theta = latNumber * Math.PI / lats;
var phi = longNumber * 2 * Math.PI / longs;
var sinTheta = Math.sin(theta);
var sinPhi = Math.sin(phi);
var cosTheta = Math.cos(theta);
var cosPhi = Math.cos(phi);
var x = cosPhi * sinTheta;
var y = cosTheta;
var z = sinPhi * sinTheta;
var u = 1-(longNumber/longs);
var v = latNumber/lats;
normalData.push(x);
normalData.push(y);
normalData.push(z);
texCoordData.push(u);
texCoordData.push(v);
geometryData.push(radius * x);
geometryData.push(radius * y);
geometryData.push(radius * z);
}
}
longs += 1;
for (var latNumber = 0; latNumber < lats; ++latNumber) {
for (var longNumber = 0; longNumber < longs; ++longNumber) {
var first = (latNumber * longs) + (longNumber % longs);
var second = first + longs;
indexData.push(first);
indexData.push(second);
indexData.push(first+1);
indexData.push(second);
indexData.push(second+1);
indexData.push(first+1);
}
}
var retval = { };
retval.normalObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.normalObject);
ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(normalData), ctx.STATIC_DRAW);
retval.texCoordObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.texCoordObject);
ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(texCoordData), ctx.STATIC_DRAW);
retval.vertexObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ARRAY_BUFFER, retval.vertexObject);
ctx.bufferData(ctx.ARRAY_BUFFER, new Float32Array(geometryData), ctx.STATIC_DRAW);
retval.numIndices = indexData.length;
retval.indexObject = ctx.createBuffer();
ctx.bindBuffer(ctx.ELEMENT_ARRAY_BUFFER, retval.indexObject);
ctx.bufferData(ctx.ELEMENT_ARRAY_BUFFER, new Uint16Array(indexData), ctx.STREAM_DRAW);
return retval;
}
//
// loadObj
//
// Load a .obj file from the passed URL. Return an object with a 'loaded' property set to false.
// When the object load is complete, the 'loaded' property becomes true and the following
// properties are set:
//
// normalObject WebGLBuffer object for normals
// texCoordObject WebGLBuffer object for texCoords
// vertexObject WebGLBuffer object for vertices
// indexObject WebGLBuffer object for indices
// numIndices The number of indices in the indexObject
//
function loadObj(ctx, url)
{
var obj = { loaded : false };
obj.ctx = ctx;
var req = new XMLHttpRequest();
req.obj = obj;
req.onreadystatechange = function () { processLoadObj(req) };
req.open("GET", url, true);
req.send(null);
return obj;
}
function processLoadObj(req)
{
webglTestLog("req="+req)
// only if req shows "complete"
if (req.readyState == 4) {
doLoadObj(req.obj, req.responseText);
}
}
function doLoadObj(obj, text)
{
vertexArray = [ ];
normalArray = [ ];
textureArray = [ ];
indexArray = [ ];
var vertex = [ ];
var normal = [ ];
var texture = [ ];
var facemap = { };
var index = 0;
var lines = text.split("\n");
for (var lineIndex in lines) {
var line = lines[lineIndex].replace(/[ \t]+/g, " ").replace(/\s\s*$/, "");
// ignore comments
if (line[0] == "#")
continue;
var array = line.split(" ");
if (array[0] == "v") {
// vertex
vertex.push(parseFloat(array[1]));
vertex.push(parseFloat(array[2]));
vertex.push(parseFloat(array[3]));
}
else if (array[0] == "vt") {
// normal
texture.push(parseFloat(array[1]));
texture.push(parseFloat(array[2]));
}
else if (array[0] == "vn") {
// normal
normal.push(parseFloat(array[1]));
normal.push(parseFloat(array[2]));
normal.push(parseFloat(array[3]));
}
else if (array[0] == "f") {
// face
if (array.length != 4) {
webglTestLog("*** Error: face '"+line+"' not handled");
continue;
}
for (var i = 1; i < 4; ++i) {
if (!(array[i] in facemap)) {
// add a new entry to the map and arrays
var f = array[i].split("/");
var vtx, nor, tex;
if (f.length == 1) {
vtx = parseInt(f[0]) - 1;
nor = vtx;
tex = vtx;
}
else if (f.length = 3) {
vtx = parseInt(f[0]) - 1;
tex = parseInt(f[1]) - 1;
nor = parseInt(f[2]) - 1;
}
else {
webglTestLog("*** Error: did not understand face '"+array[i]+"'");
return null;
}
// do the vertices
var x = 0;
var y = 0;
var z = 0;
if (vtx * 3 + 2 < vertex.length) {
x = vertex[vtx*3];
y = vertex[vtx*3+1];
z = vertex[vtx*3+2];
}
vertexArray.push(x);
vertexArray.push(y);
vertexArray.push(z);
// do the textures
x = 0;
y = 0;
if (tex * 2 + 1 < texture.length) {
x = texture[tex*2];
y = texture[tex*2+1];
}
textureArray.push(x);
textureArray.push(y);
// do the normals
x = 0;
y = 0;
z = 1;
if (nor * 3 + 2 < normal.length) {
x = normal[nor*3];
y = normal[nor*3+1];
z = normal[nor*3+2];
}
normalArray.push(x);
normalArray.push(y);
normalArray.push(z);
facemap[array[i]] = index++;
}
indexArray.push(facemap[array[i]]);
}
}
}
// set the VBOs
obj.normalObject = obj.ctx.createBuffer();
obj.ctx.bindBuffer(obj.ctx.ARRAY_BUFFER, obj.normalObject);
obj.ctx.bufferData(obj.ctx.ARRAY_BUFFER, new Float32Array(normalArray), obj.ctx.STATIC_DRAW);
obj.texCoordObject = obj.ctx.createBuffer();
obj.ctx.bindBuffer(obj.ctx.ARRAY_BUFFER, obj.texCoordObject);
obj.ctx.bufferData(obj.ctx.ARRAY_BUFFER, new Float32Array(textureArray), obj.ctx.STATIC_DRAW);
obj.vertexObject = obj.ctx.createBuffer();
obj.ctx.bindBuffer(obj.ctx.ARRAY_BUFFER, obj.vertexObject);
obj.ctx.bufferData(obj.ctx.ARRAY_BUFFER, new Float32Array(vertexArray), obj.ctx.STATIC_DRAW);
obj.numIndices = indexArray.length;
obj.indexObject = obj.ctx.createBuffer();
obj.ctx.bindBuffer(obj.ctx.ELEMENT_ARRAY_BUFFER, obj.indexObject);
obj.ctx.bufferData(obj.ctx.ELEMENT_ARRAY_BUFFER, new Uint16Array(indexArray), obj.ctx.STREAM_DRAW);
obj.loaded = true;
}
//
// loadImageTexture
//
// Load the image at the passed url, place it in a new WebGLTexture object and return the WebGLTexture.
//
function loadImageTexture(ctx, url)
{
var texture = ctx.createTexture();
texture.image = new Image();
texture.image.onload = function() { doLoadImageTexture(ctx, texture.image, texture) }
texture.image.src = url;
return texture;
}
function doLoadImageTexture(ctx, image, texture)
{
ctx.enable(ctx.TEXTURE_2D);
ctx.bindTexture(ctx.TEXTURE_2D, texture);
ctx.texImage2D(ctx.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MAG_FILTER, ctx.LINEAR);
ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MIN_FILTER, ctx.LINEAR_MIPMAP_LINEAR);
ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_S, ctx.CLAMP_TO_EDGE);
ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_T, ctx.CLAMP_TO_EDGE);
ctx.generateMipmap(ctx.TEXTURE_2D)
ctx.bindTexture(ctx.TEXTURE_2D, 0);
}
//
// Framerate object
//
// This object keeps track of framerate and displays it as the innerHTML text of the
// HTML element with the passed id. Once created you call snapshot at the end
// of every rendering cycle. Every 500ms the framerate is updated in the HTML element.
//
Framerate = function(id)
{
this.numFramerates = 10;
this.framerateUpdateInterval = 500;
this.id = id;
this.renderTime = -1;
this.framerates = [ ];
self = this;
var fr = function() { self.updateFramerate() }
setInterval(fr, this.framerateUpdateInterval);
}
Framerate.prototype.updateFramerate = function()
{
var tot = 0;
for (var i = 0; i < this.framerates.length; ++i)
tot += this.framerates[i];
var framerate = tot / this.framerates.length;
framerate = Math.round(framerate);
document.getElementById(this.id).innerHTML = "Framerate:"+framerate+"fps";
}
Framerate.prototype.snapshot = function()
{
if (this.renderTime < 0)
this.renderTime = new Date().getTime();
else {
var newTime = new Date().getTime();
var t = newTime - this.renderTime;
var framerate = 1000/t;
this.framerates.push(framerate);
while (this.framerates.length > this.numFramerates)
this.framerates.shift();
this.renderTime = newTime;
}
}
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