glGetPixelMap

GLGETPIXELMAP(3G)					    GLGETPIXELMAP(3G)



NAME
       glGetPixelMapfv, glGetPixelMapuiv, glGetPixelMapusv - return the spec-
       ified 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	 val-
	       ues	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	 dur-
       ing   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	 val-
       ues.

       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
       glColorSubTable(3G), glColorTable(3G), glConvolutionFilter1D(3G),
       glConvolutionFilter2D(3G), glCopyColorSubTable(3G),
       glCopyColorTable(3G), glCopyPixels(3G), glCopyTexImage1D(3G),
       glCopyTexImage2D(3G), glCopyTexSubImage1D(3G),
       glCopyTexSubImage2D(3G), glCopyTexSubImage3D(3G), glDrawPixels(3G),
       glGetHistogram(3G), glGetMinmax(3G), glGetTexImage(3G),
       glPixelMap(3G), glPixelTransfer(3G), glReadPixels(3G),
       glSeparableFilter2D(3G), glTexImage1D(3G), glTexImage2D(3G)
       glTexImage3D(3G), glTexSubImage1D(3G), glTexSubImage2D(3G),
       glTexSubImage3D(3G)



							    GLGETPIXELMAP(3G)