glGetPixelMap man page on Tru64

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glGetPixelMap(3G)					     glGetPixelMap(3G)

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

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

PARAMETERS
       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.  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(), glTex‐
       Image1D(), glTexImage2D(),  glTexImage3D(),  glTexSubImage1D(),	glTex‐
       SubImage2D(),   glTexSubImage3D(),   glCopyTexImage1D(),	  glCopyTexIm‐
       age2D(), glCopyTexSubImage1D(), glCopyTexSubImage2D(),  glCopyTexSubIm‐
       age3D(), glColorTable(), glColorSubTable(), glCopyColorTable(), glCopy‐
       ColorSubTable(),	  glConvolutionFilter1D(),    glConvolutionFilter2D(),
       glSeparableFilter2D(), glGetHistogram(), glGetMinmax(), and glGetTexIm‐
       age() 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 appropri‐
       ate 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(3), glColorTable(3), glConvolutionFilter1D(3), glConvo‐
       lutionFilter2D(3), glCopyColorSubTable(3), glCopyColorTable(3), glCopy‐
       Pixels(3),  glCopyTexImage1D(3),	 glCopyTexImage2D(3),  glCopyTexSubIm‐
       age1D(3),  glCopyTexSubImage2D(3),  glCopyTexSubImage3D(3),  glDrawPix‐
       els(3),	glGetHistogram(3),  glGetMinmax(3),  glGetTexImage(3),	glPix‐
       elMap(3),  glPixelTransfer(3), glReadPixels(3), glSeparableFilter2D(3),
       glTexImage1D(3),	 glTexImage1D(3),  glTexImage2D(3),   glTexImage2D(3),
       glTexImage3D(3),	 glTexSubImage1D(3),  glTexSubImage2D(3),  glTexSubIm‐
       age3D(3)

							     glGetPixelMap(3G)
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