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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>twgl/programs - Documentation</title>
<script src="scripts/prettify/prettify.js"></script>
<script src="scripts/prettify/lang-css.js"></script>
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<body>
<input type="checkbox" id="nav-trigger" class="nav-trigger" />
<label for="nav-trigger" class="navicon-button x">
<div class="navicon"></div>
</label>
<label for="nav-trigger" class="overlay"></label>
<nav>
<li class="nav-link nav-home-link"><a href="index.html">Home</a></li><li class="nav-heading">Modules</li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl.html">twgl</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.addExtensionsToContext">addExtensionsToContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindFramebufferInfo">bindFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindTransformFeedbackInfo">bindTransformFeedbackInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.bindUniformBlock">bindUniformBlock</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createBufferInfoFromArrays">createBufferInfoFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createFramebufferInfo">createFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createProgramInfo">createProgramInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTexture">createTexture</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTextures">createTextures</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTransformFeedback">createTransformFeedback</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createTransformFeedbackInfo">createTransformFeedbackInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.createUniformBlockInfo">createUniformBlockInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.drawBufferInfo">drawBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.drawObjectList">drawObjectList</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.getContext">getContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.getWebGLContext">getWebGLContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.isWebGL1">isWebGL1</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.isWebGL2">isWebGL2</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeCanvasToDisplaySize">resizeCanvasToDisplaySize</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeFramebufferInfo">resizeFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.resizeTexture">resizeTexture</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setAttribInfoBufferFromArray">setAttribInfoBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setBlockUniforms">setBlockUniforms</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setBuffersAndAttributes">setBuffersAndAttributes</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setDefaults">setDefaults</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setTextureFromArray">setTextureFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setUniformBlock">setUniformBlock</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#.setUniforms">setUniforms</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#~create3DContext">create3DContext</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl.html#~createContext">createContext</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_attributes.html">twgl/attributes</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createAttribsFromArrays">createAttribsFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferFromArray">createBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferFromTypedArray">createBufferFromTypedArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBufferInfoFromArrays">createBufferInfoFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.createBuffersFromArrays">createBuffersFromArrays</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.setAttribInfoBufferFromArray">setAttribInfoBufferFromArray</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_attributes.html#.setAttributePrefix">setAttributePrefix</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_draw.html">twgl/draw</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_draw.html#.drawBufferInfo">drawBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_draw.html#.drawObjectList">drawObjectList</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html">twgl/framebuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.bindFramebufferInfo">bindFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.createFramebufferInfo">createFramebufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_framebuffers.html#.resizeFramebufferInfo">resizeFramebufferInfo</a></span></li><li class="nav-heading"><span class="nav-item-type type-module">M</span><span class="nav-item-name"><a href="module-twgl_m4.html">twgl/m4</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.axisRotate">axisRotate</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.axisRotation">axisRotation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.copy">copy</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.frustum">frustum</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.getAxis">getAxis</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.getTranslation">getTranslation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.identity">identity</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.inverse">inverse</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.lookAt">lookAt</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.multiply">multiply</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.negate">negate</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.ortho">ortho</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.perspective">perspective</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateX">rotateX</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateY">rotateY</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotateZ">rotateZ</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationX">rotationX</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationY">rotationY</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.rotationZ">rotationZ</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.scale">scale</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.scaling">scaling</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.setAxis">setAxis</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.setTranslation">setTranslation</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transformDirection">transformDirection</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_m4.html#.transformNormal">transformNormal</a></span></li><li class="nav-item"><span 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<div id="main">
<h1 class="page-title">twgl/programs</h1>
<section>
<header>
</header>
<article>
<div class="container-overview">
<div class="description"><p>Low level shader program related functions</p>
<p>You should generally not need to use these functions. They are provided<br>for those cases where you're doing something out of the ordinary<br>and you need lower level access.</p>
<p>For backward compatibily they are available at both <code>twgl.programs</code> and <code>twgl</code><br>itself</p>
<p>See <a href="module-twgl.html"><code>module:twgl</code></a> for core functions</p></div>
<div class="section-method">
<dl class="details">
</dl>
</div>
</div>
<h3 class="subsection-title">Methods</h3>
<div class="section-method">
<h4 class="name" id=".bindUniformBlock"><span class="type-signature">(static) </span>bindUniformBlock<span class="signature">(gl, programInfo, uniformBlockInfo)</span><span class="type-signature"> → {bool}</span></h4>
<div class="description">
<p>Binds a unform block to the matching uniform block point.<br>Matches by blocks by name so blocks must have the same name not just the same<br>structure.</p>
<p>If you have changed any values and you upload the valus into the corresponding WebGLBuffer<br>call <a href="module-twgl.html#.setUniformBlock"><code>module:twgl.setUniformBlock</code></a> instead.</p>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGL2RenderingContext</code></span>
</td>
<td class="description last">
<p>A WebGL 2 rendering context.</p>
</td>
</tr>
<tr>
<td class="name"><code>programInfo</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.ProgramInfo">module:twgl.ProgramInfo</a></code></span>
|
<span class="param-type"><code><a href="module-twgl.html#.UniformBlockSpec">module:twgl.UniformBlockSpec</a></code></span>
</td>
<td class="description last">
<p>a <code>ProgramInfo</code><br> as returned from <a href="module-twgl.html#.createProgramInfo"><code>module:twgl.createProgramInfo</code></a> or or <code>UniformBlockSpec</code> as<br> returned from <code>module:twgl.createUniformBlockSpecFromProgram</code>.</p>
</td>
</tr>
<tr>
<td class="name"><code>uniformBlockInfo</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.UniformBlockInfo">module:twgl.UniformBlockInfo</a></code></span>
</td>
<td class="description last">
<p>a <code>UniformBlockInfo</code> as returned from<br> <a href="module-twgl.html#.createUniformBlockInfo"><code>module:twgl.createUniformBlockInfo</code></a>.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>bool</code></span>
</dd>
</dl>
<div class="param-desc">
<p>true if buffer was bound. If the programInfo has no block with the same block name<br> no buffer is bound.</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createAttributeSetters"><span class="type-signature">(static) </span>createAttributeSetters<span class="signature">(program)</span><span class="type-signature"> → {Object.<string, function()>}</span></h4>
<div class="description">
<p>Creates setter functions for all attributes of a shader<br>program. You can pass this to <a href="module-twgl.html#.setBuffersAndAttributes"><code>module:twgl.setBuffersAndAttributes</code></a> to set all your buffers and attributes.</p>
</div>
<dl class="details">
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><code>module:twgl.setAttributes</code> for example</li>
</ul>
</dd>
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>program</code></td>
<td class="type">
<span class="param-type"><code>WebGLProgram</code></span>
</td>
<td class="description last">
<p>the program to create setters for.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>Object.<string, function()></code></span>
</dd>
</dl>
<div class="param-desc">
<p>an object with a setter for each attribute by name.</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createProgram"><span class="type-signature">(static) </span>createProgram<span class="signature">(shaders, opt_attribs<span class="signature-attributes">opt</span>, opt_locations<span class="signature-attributes">opt</span>, opt_errorCallback<span class="signature-attributes">opt</span>)</span><span class="type-signature"> → (nullable) {WebGLProgram}</span></h4>
<div class="description">
<p>Creates a program, attaches (and/or compiles) shaders, binds attrib locations, links the<br>program and calls useProgram.</p>
<p>NOTE: There are 4 signatures for this function</p>
<pre class="prettyprint source"><code>twgl.createProgram(gl, [vs, fs], options);
twgl.createProgram(gl, [vs, fs], opt_errFunc);
twgl.createProgram(gl, [vs, fs], opt_attribs, opt_errFunc);
twgl.createProgram(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);</code></pre>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>shaders</code></td>
<td class="type">
<span class="param-type"><code>Array.<WebGLShader></code></span>
|
<span class="param-type"><code>Array.<string></code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>The shaders to attach, or element ids for their source, or strings that contain their source</p>
</td>
</tr>
<tr>
<td class="name"><code>opt_attribs</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.ProgramOptions">module:twgl.ProgramOptions</a></code></span>
|
<span class="param-type"><code>Array.<string></code></span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">
<p>Options for the program or an array of attribs names. Locations will be assigned by index if not passed in</p>
</td>
</tr>
<tr>
<td class="name"><code>opt_locations</code></td>
<td class="type">
<span class="param-type"><code>Array.<number></code></span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">
<p>The locations for the. A parallel array to opt_attribs letting you assign locations.</p>
</td>
</tr>
<tr>
<td class="name"><code>opt_errorCallback</code></td>
<td class="type">
<span class="param-type"><code><a href="module-twgl.html#.ErrorCallback">module:twgl.ErrorCallback</a></code></span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">
<p>callback for errors. By default it just prints an error to the console<br> on error. If you want something else pass an callback. It's passed an error message.</p>
</td>
</tr>
</tbody>
</table>
<div class="section-returns">
<h5>Returns:</h5>
<dl class="param-type">
<dt>
Type:
</dt>
<dd>
<span class="param-type"><code>WebGLProgram</code></span>
</dd>
</dl>
<div class="param-desc">
<p>the created program or null if error.</p>
</div>
</div>
</div>
<div class="section-method">
<h4 class="name" id=".createProgramFromScripts"><span class="type-signature">(static) </span>createProgramFromScripts<span class="signature">(gl, shaderScriptIds, opt_attribs<span class="signature-attributes">opt</span>, opt_locations<span class="signature-attributes">opt</span>, opt_errorCallback)</span><span class="type-signature"> → {WebGLProgram}</span></h4>
<div class="description">
<p>Creates a program from 2 script tags.</p>
<p>NOTE: There are 4 signatures for this function</p>
<pre class="prettyprint source"><code>twgl.createProgramFromScripts(gl, [vs, fs], opt_options);
twgl.createProgramFromScripts(gl, [vs, fs], opt_errFunc);
twgl.createProgramFromScripts(gl, [vs, fs], opt_attribs, opt_errFunc);
twgl.createProgramFromScripts(gl, [vs, fs], opt_attribs, opt_locations, opt_errFunc);</code></pre>
</div>
<dl class="details">
</dl>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>gl</code></td>
<td class="type">
<span class="param-type"><code>WebGLRenderingContext</code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>The WebGLRenderingContext<br> to use.</p>
</td>
</tr>
<tr>
<td class="name"><code>shaderScriptIds</code></td>
<td class="type">
<span class="param-type"><code>Array.<string></code></span>
</td>
<td class="attributes">
</td>
<td class="description last">
<p>Array of ids of the script<br> tags for the shaders. The first is assumed to be the<br> vertex shader, the second the fragment shader.</p>
</td>
</tr>
<tr>
<td class="name"><code>opt_attribs</code></td>
<td class="type">
<span class="param-type"><code>Array.<string></code></span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">
<p>An array of attribs names. Locations will be assigned by index if not passed in</p>
</td>
</tr>