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Core in version 4.6
Core since version 2.0

glIsShader: Determines if a name corresponds to a shader object

Function Definition

 GLboolean glIsShader(GLuint shader​);
Specifies a potential shader object.


glIsShader returns GL_TRUE if shader​ is the name of a shader object previously created with glCreateShader and not yet deleted with glDeleteShader. If shader​ is zero or a non-zero value that is not the name of a shader object, or if an error occurs, glIsShader returns GL_FALSE.


No error is generated if shader​ is not a valid shader object name.

A shader object marked for deletion with glDeleteShader but still attached to a program object is still considered a shader object and glIsShader will return GL_TRUE.

Associated Gets

glGetAttachedShaders with a valid program object

glGetShader with arguments shader​ and a parameter to be queried

glGetShaderInfoLog with argument object​

glGetShaderSource with argument object​

See Also

glCreateShader, glDeleteShader


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.