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GLPRIORITIZETEXTURES(3G) OpenGL Manual GLPRIORITIZETEXTURES(3G)
glPrioritizeTextures - set texture residence priority
void glPrioritizeTextures(GLsizei n, const GLuint * textures,
const GLclampf * priorities);
Specifies the number of textures to be prioritized.
Specifies an array containing the names of the textures to be prioritized.
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.
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
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 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
glPrioritizeTextures is available only if the GL version is 1.1 or greater.
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().
glGetTexParameter() with parameter name GL_TEXTURE_PRIORITY retrieves the priority of a
currently bound texture.
glAreTexturesResident(), glBindTexture(), glCopyTexImage1D(), glCopyTexImage2D(),
glTexImage1D(), glTexImage2D(), glTexImage3D(), glTexParameter()
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/.
opengl.org 06/10/2014 GLPRIORITIZETEXTURES(3G)
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