fglPrioritizeTextures(3G) OpenGL Reference fglPrioritizeTextures(3G)NAMEfglPrioritizeTextures - set texture residence priority
FORTRAN SPECIFICATION
SUBROUTINE fglPrioritizeTextures( INTEGER*4 n,
CHARACTER*8 textures,
CHARACTER*8 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.
DESCRIPTIONfglPrioritizeTextures 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, fglPrioritizeTextures 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.
fglPrioritizeTextures silently ignores attempts to prioritize texture 0,
or any texture name that does not correspond to an existing texture.
fglPrioritizeTextures does not require that any of the textures named by
textures be bound to a texture target. fglTexParameter 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.
NOTESfglPrioritizeTextures is available only if the GL version is 1.1 or
greater.
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fglPrioritizeTextures(3G) OpenGL Reference fglPrioritizeTextures(3G)ERRORS
GL_INVALID_VALUE is generated if n is negative.
GL_INVALID_OPERATION is generated if fglPrioritizeTextures is executed
between the execution of fglBegin and the corresponding execution of
fglEnd.
ASSOCIATED GETS
fglGetTexParameter with parameter name GL_TEXTURE_PRIORITY retrieves the
priority of a currently bound texture.
SEE ALSO
fglAreTexturesResident, fglBindTexture, fglCopyTexImage1D,
fglCopyTexImage2D, fglTexImage1D, fglTexImage2D, fglTexImage3D,
fglTexParameter
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