<div class="refentry" lang="en" xml:lang="en"><a id="glCreateProgram"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCreateProgram — Creates a program object</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table><tr><td><code class="funcdef">GLuint <b class="fsfunc">glCreateProgram</b>(</code></td><td> </td><td><var class="pdparam">void</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p><code class="function">glCreateProgram</code> creates an empty

program object and returns a non-zero value by which it can be

referenced. A program object is an object to which shader

objects can be attached. This provides a mechanism to specify

the shader objects that will be linked to create a program. It

also provides a means for checking the compatibility of the

shaders that will be used to create a program (for instance,

checking the compatibility between a vertex shader and a

fragment shader). When no longer needed as part of a program

object, shader objects can be detached.</p><p>One or more executables are created in a program object by

successfully attaching shader objects to it with

<a class="citerefentry" href="glAttachShader"><span class="citerefentry"><span class="refentrytitle">glAttachShader</span></span></a>,

successfully compiling the shader objects with

<a class="citerefentry" href="glCompileShader"><span class="citerefentry"><span class="refentrytitle">glCompileShader</span></span></a>,

and successfully linking the program object with

<a class="citerefentry" href="glLinkProgram"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>.

These executables are made part of current state when

<a class="citerefentry" href="glUseProgram"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>

is called. Program objects can be deleted by calling

<a class="citerefentry" href="glDeleteProgram"><span class="citerefentry"><span class="refentrytitle">glDeleteProgram</span></span></a>.

The memory associated with the program object will be deleted

when it is no longer part of current rendering state for any

context.</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p><code class="function">glCreateProgram</code> is available only if

the GL version is 2.0 or greater.</p><p>Like display lists and texture objects, the name space for

program objects may be shared across a set of contexts, as long

as the server sides of the contexts share the same address

space. If the name space is shared across contexts, any attached

objects and the data associated with those attached objects are

shared as well.</p><p>Applications are responsible for providing the

synchronization across API calls when objects are accessed from

different execution threads.</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>This function returns 0 if an error occurs creating the program object.</p><p><code class="constant">GL_INVALID_OPERATION</code> is generated if

<code class="function">glCreateProgram</code> is executed between the

execution of

<a class="citerefentry" href="glBegin"><span class="citerefentry"><span class="refentrytitle">glBegin</span></span></a>

and the corresponding execution of

<a class="citerefentry" href="glEnd"><span class="citerefentry"><span class="refentrytitle">glEnd</span></span></a>.</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="associatedgets"></a><h2>Associated Gets</h2><p><a class="citerefentry" href="glGet"><span class="citerefentry"><span class="refentrytitle">glGet</span></span></a>

with the argument <code class="constant">GL_CURRENT_PROGRAM</code></p><p><a class="citerefentry" href="glGetActiveAttrib"><span class="citerefentry"><span class="refentrytitle">glGetActiveAttrib</span></span></a>

with a valid program object and the index of an active attribute

variable</p><p><a class="citerefentry" href="glGetActiveUniform"><span class="citerefentry"><span class="refentrytitle">glGetActiveUniform</span></span></a>

with a valid program object and the index of an active uniform

variable</p><p><a class="citerefentry" href="glGetAttachedShaders"><span class="citerefentry"><span class="refentrytitle">glGetAttachedShaders</span></span></a>

with a valid program object</p><p><a class="citerefentry" href="glGetAttribLocation"><span class="citerefentry"><span class="refentrytitle">glGetAttribLocation</span></span></a>

with a valid program object and the name of an attribute

variable</p><p><a class="citerefentry" href="glGetProgram"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>

with a valid program object and the parameter to be queried</p><p><a class="citerefentry" href="glGetProgramInfoLog"><span class="citerefentry"><span class="refentrytitle">glGetProgramInfoLog</span></span></a>

with a valid program object</p><p><a class="citerefentry" href="glGetUniform"><span class="citerefentry"><span class="refentrytitle">glGetUniform</span></span></a>

with a valid program object and the location of a uniform

variable</p><p><a class="citerefentry" href="glGetUniformLocation"><span class="citerefentry"><span class="refentrytitle">glGetUniformLocation</span></span></a>

with a valid program object and the name of a uniform

variable</p><p><a class="citerefentry" href="glIsProgram"><span class="citerefentry"><span class="refentrytitle">glIsProgram</span></span></a></p></div>

{$pipelinestall}{$examples}

<div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p><a class="citerefentry" href="glAttachShader"><span class="citerefentry"><span class="refentrytitle">glAttachShader</span></span></a>,

<a class="citerefentry" href="glBindAttribLocation"><span class="citerefentry"><span class="refentrytitle">glBindAttribLocation</span></span></a>,

<a class="citerefentry" href="glCreateShader"><span class="citerefentry"><span class="refentrytitle">glCreateShader</span></span></a>,

<a class="citerefentry" href="glDeleteProgram"><span class="citerefentry"><span class="refentrytitle">glDeleteProgram</span></span></a>,

<a class="citerefentry" href="glDetachShader"><span class="citerefentry"><span class="refentrytitle">glDetachShader</span></span></a>,

<a class="citerefentry" href="glLinkProgram"><span class="citerefentry"><span class="refentrytitle">glLinkProgram</span></span></a>,

<a class="citerefentry" href="glUniform"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>,

<a class="citerefentry" href="glUseProgram"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>,

<a class="citerefentry" href="glValidateProgram"><span class="citerefentry"><span class="refentrytitle">glValidateProgram</span></span></a></p></div><div class="refsect1" lang="en" xml:lang="en"><div id="Copyright"><h2>Copyright</h2><p>

Copyright © 2003-2005 3Dlabs Inc. Ltd.

This material may be distributed subject to the terms and conditions set forth in

the Open Publication License, v 1.0, 8 June 1999.

<a class="ulink" href="https://opencontent.org/openpub/" target="_top">https://opencontent.org/openpub/</a>.

</p></div></div></div>