glGetPixelMap(3G)	       OpenGL Reference		     glGetPixelMap(3G)

NAME    [Toc]    [Back]

     glGetPixelMapfv, glGetPixelMapuiv,	glGetPixelMapusv - return the
     specified pixel map

C SPECIFICATION    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

     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    [Toc]    [Back]

     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,
     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
     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    [Toc]    [Back]

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

ERRORS    [Toc]    [Back]

     GL_INVALID_ENUM is	generated if map is not	an accepted value.






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glGetPixelMap(3G)	       OpenGL Reference		     glGetPixelMap(3G)



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

ASSOCIATED GETS    [Toc]    [Back]

     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    [Toc]    [Back]

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


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