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Core in version 4.5
Core since version 2.0

glIsProgram: Determines if a name corresponds to a program object

Function Definition

 GLboolean glIsProgram(GLuint program​);
Specifies a potential program object.


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.


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.

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

glCreateProgram, glCreateShaderProgram, glDeleteProgram


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.