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GLARETEXTURESRESIDEN(3G)		  OpenGL Manual 		 GLARETEXTURESRESIDEN(3G)

NAME
       glAreTexturesResident - determine if textures are loaded in texture memory

C SPECIFICATION
       GLboolean glAreTexturesResident(GLsizei n, const GLuint * textures,
				       GLboolean * residences);

PARAMETERS
       n
	   Specifies the number of textures to be queried.

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

       residences
	   Specifies an array in which the texture residence status is returned. The residence
	   status of a texture named by an element of textures is returned in the corresponding
	   element of residences.

DESCRIPTION
       GL establishes a ``working set'' of textures that are resident in texture 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 n textures named by the
       elements of textures. If all the named textures are resident, glAreTexturesResident
       returns GL_TRUE, and the contents of residences are undisturbed. If not all the named
       textures are resident, glAreTexturesResident returns GL_FALSE, and detailed status is
       returned in the n elements of residences. If an element of residences is GL_TRUE, then the
       texture named by the corresponding element of textures 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 remain 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 n is negative.

       GL_INVALID_VALUE is generated if any element in textures is 0 or does not name a texture.
       In that case, the function returns GL_FALSE and the contents of residences is
       indeterminate.

       GL_INVALID_OPERATION is generated if glAreTexturesResident is executed between the
       execution of glBegin() and the corresponding execution of glEnd().

ASSOCIATED GETS
       glGetTexParameter() with parameter name GL_TEXTURE_RESIDENT retrieves the residence status
       of a currently bound texture.

SEE ALSO
       glBindTexture(), glGetTexParameter(), glPrioritizeTextures(), glTexImage1D(),
       glTexImage2D(), glTexImage3D(), glTexParameter()

COPYRIGHT
       Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI
       Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org				    06/10/2014			 GLARETEXTURESRESIDEN(3G)
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