fglIsTextureEXT(3G)

NAME
     fglIsTextureEXT - determine if a name corresponds to a texture


FORTRAN SPECIFICATION
     LOGICAL*1 fglIsTextureEXT( INTEGER*4 texture )


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

DESCRIPTION
     fglIsTextureEXT 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, fglIsTextureEXT
     returns GL_FALSE.

     fglIsTextureEXT is not included in display lists.

NOTES
     fglIsTextureEXT is part of the EXT_texture_object extension.  See
     fglIntro for more information about using extensions.

ERRORS
     GL_INVALID_OPERATION is generated if fglIsTextureEXT is executed between
     the execution of fglBegin and the corresponding execution of fglEnd.


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
     fglBindTextureEXT, fglDeleteTexturesEXT, fglGenTexturesEXT, fglGet,
     fglGetTexParameter, fglTexImage1D, fglTexImage2D, fglTexImage3DEXT,
     fglTexParameter.