fglIsTextureEXT(3G) OpenGL Reference 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.
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