GLboolean GLAPIENTRY glAreTexturesResident( GLsizei GLsizei )

PARAMETERS
       GLsizei  Specifies the number of textures to be queried.

       _param2  Specifies an array containing the names of the textures  to  be
                queried.

       _param3  Specifies an array in which the texture residence status is re‐
                turned.  The residence status of a texture named by an  element
                of _param2 is returned in the corresponding element of _param3.

DESCRIPTION
       GL  establishes  a ``working set'' of textures that are resident in tex‐
       ture memory.  These textures can be bound to a texture target much  more
       efficiently than textures that are not resident.

       glAreTexturesResident  queries  the  texture residence status of the GL‐
       sizei textures named by the elements of _param2.  If all the named  tex‐
       tures  are resident, glAreTexturesResident returns GL_TRUE, and the con‐
       tents of _param3 are undisturbed.  If not all  the  named  textures  are
       resident, glAreTexturesResident returns GL_FALSE, and detailed status is
       returned in the GLsizei elements of _param3.  If an element  of  _param3
       is  GL_TRUE,  then  the  texture  named  by the corresponding element of
       _param2 is resident.

       The residence status of a single bound texture may also  be  queried  by
       calling  glGetTexParameter with the target argument set to the target to
       which  the  texture  is  bound,  and   the   pname   argument   set   to
       GL_TEXTURE_RESIDENT.   This is the only way that the residence status of
       a default texture can be queried.

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

       glAreTexturesResident  returns  the  residency status of the textures at
       the time of invocation. It does not guarantee that the textures will re‐
       main resident at any other time.

       If  textures reside in virtual memory (there is no texture memory), they
       are considered always resident.

       Some implementations may not load a texture until the first use of  that
       texture.

ERRORS
       GL_INVALID_VALUE is generated if GLsizei is negative.

       GL_INVALID_VALUE is generated if any element in _param2 is 0 or does not
       name a texture. In that case, the function returns GL_FALSE and the con‐
       tents of _param3 is indeterminate.