Section: Misc. Reference Manual Pages (3G)
- set texture residence priority
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.
assigns the n
texture priorities given in priorities
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 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.
is available only if the GL version is 1.1 or greater.
is generated if n
GL_INVALID_OPERATION is generated if glPrioritizeTextures is executed
between the execution of glBegin and the corresponding
execution of glEnd.
with parameter name GL_TEXTURE_PRIORITY
retrieves the priority of a currently bound texture.