glprioritizetextures(3G)



glPrioritizeTextures(3G)       OpenGL Reference       glPrioritizeTextures(3G)



NAME
     glPrioritizeTextures - set texture residence priority


C SPECIFICATION
     void glPrioritizeTextures( GLsizei n,
                                const GLuint *textures,
                                const GLclampf *priorities )


PARAMETERS
     n           Specifies the number of textures to be prioritized.

     textures    Specifies an array containing the names of the textures to be
                 prioritized.

     priorities  Specifies an array containing the texture priorities.  A
                 priority given in an element of priorities applies to the
                 texture named by the corresponding element of textures.

DESCRIPTION
     glPrioritizeTextures assigns the n texture priorities given in priorities
     to the n textures named in textures.

     The GL establishes a ``working set'' of textures that are resident in
     texture memory.  These textures may be bound to a texture target much
     more efficiently than textures that are not resident.  By specifying a
     priority for each texture, glPrioritizeTextures allows applications to
     guide the GL implementation in determining which textures should be
     resident.

     The priorities given in priorities are clamped to the range [0, 1] before
     being assigned.  0 indicates the lowest priority; textures with priority
     zero are least likely to be resident.  1 indicates the highest priority;
     textures with priority one are most likely to be resident.  However,
     textures are not guaranteed to be resident until they are used.

     glPrioritizeTextures silently ignores attempts to prioritize texture 0,
     or any texture name that does not correspond to an existing texture.

     glPrioritizeTextures does not require that any of the textures named by
     textures be bound to a texture target.  glTexParameter may also be used
     to set a texture's priority, but only if the texture is currently bound.
     This is the only way to set the priority of a default texture.

     glPrioritizeTextures is included in display lists.

NOTES
     glPrioritizeTextures is available only if the GL version is 1.1 or
     greater.





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glPrioritizeTextures(3G)       OpenGL Reference       glPrioritizeTextures(3G)



ERRORS
     GLINVALIDVALUE is generated if n is negative.

     GLINVALIDOPERATION is generated if glPrioritizeTextures is executed
     between the execution of glBegin and the corresponding execution of
     glEnd.

ASSOCIATED GETS
     glGetTexParameter with parameter name GLTEXTUREPRIORITY retrieves the
     priority of a currently bound texture.

SEE ALSO
     glAreTexturesResident, glBindTexture, glCopyTexImage1D, glCopyTexImage2D,
     glTexImage1D, glTexImage2D, glTexParameter









































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