glColorSubTable(3G)	       OpenGL Reference		   glColorSubTable(3G)

NAME    [Toc]    [Back]

     glColorSubTable - respecify a portion of a	color table

C SPECIFICATION    [Toc]    [Back]

     void glColorSubTable( GLenum target,
			   GLsizei start,
			   GLsizei count,
			   GLenum format,
			   GLenum type,
			   const GLvoid	*data )

PARAMETERS    [Toc]    [Back]

     target  Must be one of GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE,
	     or	GL_POST_COLOR_MATRIX_COLOR_TABLE.

     start   The starting index	of the portion of the color table to be
	     replaced.

     count   The number	of table entries to replace.

     format  The format	of the pixel data in data.  The	allowable values are
	     GL_RED, GL_GREEN, GL_BLUE,	GL_ALPHA, GL_LUMINANCE,
	     GL_LUMINANCE_ALPHA, GL_RGB, GL_BGR, GL_RGBA, GL_BGRA, and
	     GL_ABGR_EXT.

     type    The type of the pixel data	in data.  The allowable	values are
	     GL_UNSIGNED_BYTE, GL_BYTE,	GL_UNSIGNED_SHORT, GL_SHORT,
	     GL_UNSIGNED_INT, GL_INT, GL_FLOAT,	GL_UNSIGNED_BYTE_3_3_2,
	     GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5,
	     GL_UNSIGNED_SHORT_5_6_5_REV, GL_UNSIGNED_SHORT_4_4_4_4,
	     GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_UNSIGNED_SHORT_5_5_5_1,
	     GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_UNSIGNED_INT_8_8_8_8,
	     GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2, and
	     GL_UNSIGNED_INT_2_10_10_10_REV.

     data    Pointer to	a one-dimensional array	of pixel data that is
	     processed to replace the specified	region of the color table.

DESCRIPTION    [Toc]    [Back]

     glColorSubTable is	used to	respecify a contiguous portion of a color
     table previously defined using glColorTable.  The pixels referenced by
     data replace the portion of the existing table from indices start to
     $"start"~+~"count"~-~1$, inclusive.  This region may not include any
     entries outside the range of the color table as it	was originally
     specified.	 It is not an error to specify a subtexture with width of 0,
     but such a	specification has no effect.







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glColorSubTable(3G)	       OpenGL Reference		   glColorSubTable(3G)



NOTES
     glColorSubTable is	present	only if	GL_ARB_imaging is returned when
     glGetString is called with	an argument of GL_EXTENSIONS.

     GL_ABGR_EXT is valid only if the EXT_abgr extension is supported.

ERRORS    [Toc]    [Back]

     GL_INVALID_ENUM is	generated if target is not one of the allowable
     values.

     GL_INVALID_VALUE is generated if $"start"~+~"count"~>~width$.

     GL_INVALID_ENUM is	generated if format is not one of the allowable
     values.

     GL_INVALID_ENUM is	generated if type is not one of	the allowable values.

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

ASSOCIATED GETS    [Toc]    [Back]

     glGetColorTable, glGetColorTableParameter

SEE ALSO    [Toc]    [Back]

     glColorSubTable, glColorTableParameter, glCopyColorTable,
     glCopyColorSubTable, glGetColorTable


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