glIsTextureEXT(3G)

NAME
     glIsTextureEXT - determine if a name corresponds to a texture


C SPECIFICATION
     GLboolean glIsTextureEXT( GLuint texture )


PARAMETERS
     texture  A value which might be the name of a texture.

DESCRIPTION
     glIsTextureEXT returns GL_TRUE if texture is currently the name of a
     texture.  If texture is zero, or is a non-zero value that is not
     currently the name of a texture, or if an error occurs, glIsTextureEXT
     returns GL_FALSE.

     glIsTextureEXT is not included in display lists.

NOTES
     glIsTextureEXT is part of the EXT_texture_object extension.  See glIntro
     for more information about using extensions.

ERRORS
     GL_INVALID_OPERATION is generated if glIsTextureEXT is executed between
     the execution of glBegin and the corresponding execution of glEnd.


MACHINE DEPENDENCIES
     RealityEngine, RealityEngine2, and VTX systems do not support texture
     name sharing.  Texture names are always local to the rendering context
     which was active at the time the names were created.

     The implementation on O2 systems uses a minimum of 64K bytes for every
     texture object defined.


SEE ALSO
     glBindTextureEXT, glDeleteTexturesEXT, glGenTexturesEXT, glGet,
     glGetTexParameter, glTexImage1D, glTexImage2D, glTexImage3DEXT,
     glTexParameter.