glIsProgram
3G

# glIsProgram

Determines if a name corresponds to a program object

## C Specification

    		GLboolean glIsProgram
    		GLuint program

## Parameters

`program`

  Specifies a potential program object.

## Description

`glIsProgram` returns `GL_TRUE` if `program` is the name of a program object previously created with glCreateProgram and not yet deleted with glDeleteProgram. If `program` is zero or a non-zero value that is not the name of a program object, or if an error occurs, `glIsProgram` returns `GL_FALSE`.

## Notes

`glIsProgram` is available only if the GL version is 2.0 or greater.

No error is generated if `program` is not a valid program object name.

A program object marked for deletion with glDeleteProgram but still in use as part of current rendering state is still considered a program object and `glIsProgram` will return `GL_TRUE`.

## Errors

`GL_INVALID_OPERATION` is generated if `glIsProgram` is executed between the execution of glBegin and the corresponding execution of glEnd.

## Associated Gets

glGet with the argument `GL_CURRENT_PROGRAM`

glGetActiveAttrib with arguments `program` and the index of an active attribute variable

glGetActiveUniform with arguments `program` and the index of an active uniform variable

glGetAttachedShaders with argument `program`

glGetAttribLocation with arguments `program` and the name of an attribute variable

glGetProgram with arguments `program` and the parameter to be queried

glGetProgramInfoLog with argument `program`

glGetUniform with arguments `program` and the location of a uniform variable

glGetUniformLocation with arguments `program` and the name of a uniform variable

## See Also

glAttachShader, glBindAttribLocation, glCreateProgram, glDeleteProgram, glDetachShader, glLinkProgram, glUniform, glUseProgram, glValidateProgram

## Copyright

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. http://opencontent.org/openpub/.