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glprioritizetextures

GLPRIORITIZETEXTURES(3G)												  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 they are assigned.  0 indicates the lowest priority; textures with
       priority  0  are  least	likely to be resident.	1 indicates the highest priority; textures with priority 1 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  tex-
       ture.

       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  tex-
       ture.

NOTES

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

ERRORS

       GL_INVALID_VALUE is generated if n is negative.

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

ASSOCIATED GETS

       glGetTexParameter with parameter name GL_TEXTURE_PRIORITY retrieves the priority of a currently bound texture.

SEE ALSO

       glAreTexturesResident(3G),   glBindTexture(3G),	  glCopyTexImage1D(3G),    glCopyTexImage2D(3G),    glTexImage1D(3G),	 glTexImage2D(3G),
       glTexImage3D(3G), glTexParameter(3G)

															  GLPRIORITIZETEXTURES(3G)

Programming