glGetPixelMap(3G)

NAME
     glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv - return the
     specified pixel map


C SPECIFICATION
     void glGetPixelMapfv( GLenum map,
                           GLfloat *values )
     void glGetPixelMapuiv( GLenum map,
                            GLuint *values )
     void 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
     contents of the pixel map specified in map.  Pixel maps are used during
     the execution of glReadPixels, glDrawPixels, glCopyPixels, glTexImage1D,
     and glTexImage2D to map color indices, stencil indices, color components,
     and depth components to other values.

     Unsigned integer values, if requested, are linearly mapped from the
     internal 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
     glGet with argument GL_PIXEL_MAP_I_TO_B_SIZE
     glGet with argument GL_PIXEL_MAP_I_TO_A_SIZE
     glGet with argument GL_PIXEL_MAP_R_TO_R_SIZE
     glGet with argument GL_PIXEL_MAP_G_TO_G_SIZE
     glGet with argument GL_PIXEL_MAP_B_TO_B_SIZE
     glGet with argument GL_PIXEL_MAP_A_TO_A_SIZE
     glGet with argument GL_MAX_PIXEL_MAP_TABLE


SEE ALSO
     glCopyPixels, glDrawPixels, glPixelMap, glPixelTransfer, glReadPixels,
     glTexImage1D, glTexImage2D