void GLAPIENTRY glGetPixelMapfv( GLenum map,
                                        GLfloat *values )
       void GLAPIENTRY glGetPixelMapuiv( GLenum map,
                                         GLuint *values )
       void GLAPIENTRY glGetPixelMapusv( GLenum map,
                                         GLushort *values )

PARAMETERS
       map     Specifies the name of the pixel map to return.  Accepted  values
               are           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, and GL_PIXEL_MAP_A_TO_A.

       values  Returns the pixel map contents.

DESCRIPTION
       See the glPixelMap reference page for a description  of  the  acceptable
       values  for the map parameter.  glGetPixelMap returns in values the con‐
       tents of the pixel map specified in map.  Pixel maps are used during the
       execution  of  glReadPixels,  glDrawPixels,  glCopyPixels, glTexImage1D,
       glTexImage2D,    glTexImage3D,     glTexSubImage1D,     glTexSubImage2D,
       glTexSubImage3D,           glCopyTexImage1D,           glCopyTexImage2D,
       glCopyTexSubImage1D,      glCopyTexSubImage2D,      glCopyTexSubImage3D,
       glColorTable,  glColorSubTable,  glCopyColorTable,  glCopyColorSubTable,
       glConvolutionFilter1D,    glConvolutionFilter2D,    glSeparableFilter2D,
       glGetHistogram,  glGetMinmax,  and  glGetTexImage  to map color indices,
       stencil indices, color components, and depth components to other values.

       Unsigned integer values, if requested, are linearly mapped from the  in‐
       ternal  fixed or floating-point representation such that 1.0 maps to the
       largest representable integer value, and 0.0 maps to 0.  Return unsigned
       integer  values  are  undefined  if  the  map value was not in the range
       [0,1].

       To determine the required size of map, call glGet with  the  appropriate
       symbolic constant.

NOTES
       If an error is generated, no change is made to the contents of values.

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

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

ASSOCIATED GETS
       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
       glSeparableFilter2D, glTexImage1D, glTexImage1D, glTexImage2D
       glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage2D,
       glTexSubImage3D

                                                              GLGETPIXELMAP(3G)