glPrioritizeTextures(3g)

1GLPRIORITIZETEXTURES(3G)                              GLPRIORITIZETEXTURES(3G)
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NAME

6       glPrioritizeTextures - set texture residence priority
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C SPECIFICATION

10       void glPrioritizeTextures( GLsizei n,
11                                  const GLuint *textures,
12                                  const GLclampf *priorities )
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PARAMETERS

16       n           Specifies the number of textures to be prioritized.
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18       textures    Specifies  an array containing the names of the textures to
19                   be prioritized.
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21       priorities  Specifies an array containing the  texture  priorities.   A
22                   priority  given  in an element of priorities applies to the
23                   texture named by the corresponding element of textures.
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DESCRIPTION

26       glPrioritizeTextures assigns the n texture priorities given in  priori‐
27       ties to the n textures named in textures.
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29       The  GL  establishes a ``working set'' of textures that are resident in
30       texture memory.  These textures may be bound to a texture  target  much
31       more  efficiently than textures that are not resident.  By specifying a
32       priority for each texture, glPrioritizeTextures allows applications  to
33       guide  the  GL  implementation  in determining which textures should be
34       resident.
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36       The priorities given in priorities  are  clamped  to  the  range  [0,1]
37       before  they  are  assigned.  0 indicates the lowest priority; textures
38       with priority 0 are least likely to be resident.  1 indicates the high‐
39       est  priority; textures with priority 1 are most likely to be resident.
40       However, textures are not guaranteed to  be  resident  until  they  are
41       used.
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43       glPrioritizeTextures silently ignores attempts to prioritize texture 0,
44       or any texture name that does not correspond to an existing texture.
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46       glPrioritizeTextures does not require that any of the textures named by
47       textures be bound to a texture target.  glTexParameter may also be used
48       to set a texture's priority, but  only  if  the  texture  is  currently
49       bound.  This is the only way to set the priority of a default texture.
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NOTES

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

56       GL_INVALID_VALUE is generated if n is negative.
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58       GL_INVALID_OPERATION is generated if glPrioritizeTextures  is  executed
59       between  the  execution  of  glBegin and the corresponding execution of
60       glEnd.
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ASSOCIATED GETS

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