GLsizei mapsiz )
       void GLAPIENTRY glPixelMapuiv( GLenum map,
                                      GLsizei mapsiz )
       void GLAPIENTRY glPixelMapusv( GLenum map,
                                      GLsizei mapsiz )

PARAMETERS
       map     Specifies a symbolic map name.  Must be one of the following:
               GL_PIXEL_MAP_I_TO_I, GL_PIXEL_MAP_S_TO_S, GL_PIXEL_MAP_I_TO_R,
               GL_PIXEL_MAP_I_TO_G, GL_PIXEL_MAP_I_TO_B, GL_PIXEL_MAP_I_TO_A,
               GL_PIXEL_MAP_R_TO_R, GL_PIXEL_MAP_G_TO_G, GL_PIXEL_MAP_B_TO_B,
               or GL_PIXEL_MAP_A_TO_A.

       mapsiz  Specifies the size of the map being defined.

       _param3 Specifies an array of mapsiz values.

DESCRIPTION
       glPixelMap sets up translation tables, or maps, used by glCopyPixels,
       glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D,
       glCopyTexSubImage2D, glCopyTexSubImage3D, glDrawPixels, glReadPixels,
       glTexImage1D, glTexImage2D, glTexImage3D, glTexSubImage1D,
       glTexSubImage2D, and glTexSubImage3D.  Additionally, if the
       GL_ARB_imaging subset is supported, the routines glColorTable,
       glColorSubTable, glConvolutionFilter1D, glConvolutionFilter2D,
       glHistogram, glMinmax, and glSeparableFilter2D.  Use of these maps is
       described completely in the glPixelTransfer reference page, and partly
       in the reference pages for the pixel and texture image commands.  Only
       the specification of the maps is described in this reference page.

       map is a symbolic map name, indicating one of ten maps to set.  mapsiz
       specifies the number of entries in the map, and _param3 is a pointer to
       an array of mapsiz map values.

       The ten maps are as follows:

       GL_PIXEL_MAP_I_TO_I           Maps color indices to color indices.

       GL_PIXEL_MAP_S_TO_S           Maps stencil indices to stencil indices.

       GL_PIXEL_MAP_I_TO_R           Maps color indices to red components.

       GL_PIXEL_MAP_I_TO_G           Maps color indices to green components.

       GL_PIXEL_MAP_I_TO_B           Maps color indices to blue components.

       GL_PIXEL_MAP_I_TO_A           Maps color indices to alpha components.

       GL_PIXEL_MAP_R_TO_R           Maps red components to red components.

       GL_PIXEL_MAP_G_TO_G           Maps green components to green components.


       Maps that store indices, GL_PIXEL_MAP_I_TO_I and GL_PIXEL_MAP_S_TO_S,
       retain their values in fixed-point format, with an unspecified number of
       bits to the right of the binary point.  Floating-point values specified
       by glPixelMapfv are converted directly to the internal fixed-point for‐
       mat of these maps.  Unsigned integer values specified by glPixelMapusv
       and glPixelMapuiv specify integer values, with all 0's to the right of
       the binary point.

       The following table shows the initial sizes and values for each of the
       maps.  Maps that are indexed by either color or stencil indices must
       have mapsiz = 2n for some n or the results are undefined.  The maximum
       allowable size for each map depends on the implementation and can be de‐
       termined by calling glGet with argument GL_MAX_PIXEL_MAP_TABLE.  The
       single maximum applies to all maps; it is at least 32.

 ─────────────────────────────────────────────────────────────────────────────────────
 map                    Lookup Index     Lookup Value    Initial Size   Initial Value
 ─────────────────────────────────────────────────────────────────────────────────────
 GL_PIXEL_MAP_I_TO_I    color index      color index          1               0
 GL_PIXEL_MAP_S_TO_S   stencil index    stencil index         1               0
 GL_PIXEL_MAP_I_TO_R    color index           R               1               0
 GL_PIXEL_MAP_I_TO_G    color index           G               1               0
 GL_PIXEL_MAP_I_TO_B    color index           B               1               0
 GL_PIXEL_MAP_I_TO_A    color index           A               1               0
 GL_PIXEL_MAP_R_TO_R         R                R               1               0
 GL_PIXEL_MAP_G_TO_G         G                G               1               0
 GL_PIXEL_MAP_B_TO_B         B                B               1               0
 GL_PIXEL_MAP_A_TO_A         A                A               1               0
 ─────────────────────────────────────────────────────────────────────────────────────

ERRORS
       GL_INVALID_ENUM is generated if map is not an accepted value.

       GL_INVALID_VALUE is generated if mapsiz is less than one or larger than
       GL_MAX_PIXEL_MAP_TABLE.

       GL_INVALID_VALUE is generated if map is GL_PIXEL_MAP_I_TO_I,
       GL_PIXEL_MAP_S_TO_S, GL_PIXEL_MAP_I_TO_R, GL_PIXEL_MAP_I_TO_G,
       GL_PIXEL_MAP_I_TO_B, or GL_PIXEL_MAP_I_TO_A, and mapsiz is not a power
       of two.

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

ASSOCIATED GETS
       glGetPixelMap
       glGet with argument GL_PIXEL_MAP_I_TO_I_SIZE
       glGet with argument GL_PIXEL_MAP_S_TO_S_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_R_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_G_SIZE
       glGet with argument GL_PIXEL_MAP_I_TO_B_SIZE

                                                                 GLPIXELMAP(3G)