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+_C_ License Applicability. Except to the extent portions of this file are
+_C_ made subject to an alternative license as permitted in the SGI Free
+_C_ Software License B, Version 1.1 (the "License"), the contents of this
+_C_ file are subject only to the provisions of the License. You may not use
+_C_ this file except in compliance with the License. You may obtain a copy
+_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+_C_
+_C_ http://oss.sgi.com/projects/FreeB
+_C_
+_C_ Note that, as provided in the License, the Software is distributed on an
+_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+_C_
+_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
+_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+_C_ Copyright in any portions created by third parties is as indicated
+_C_ elsewhere herein. All Rights Reserved.
+_C_
+_C_ Additional Notice Provisions: The application programming interfaces
+_C_ established by SGI in conjunction with the Original Code are The
+_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
+_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
+_C_ published by SGI, but has not been independently verified as being
+_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
+_C_
+_C_ The first character in this file must be an '_'!
+_C_ Anything on a line after _C_ is ignored
+_define(_filters,tbl)_C_
+_header(GetSeparableFilter,get separable convolution filter kernel images)
+_names(GetSeparableFilter)
+_define(@<__target>@,@<_param1>@)_C_
+_define(@<__format>@,@<_param2>@)_C_
+_define(@<__type>@,@<_param3>@)_C_
+_define(@<__row>@,@<_param4>@)_C_
+_define(@<__column>@,@<_param5>@)_C_
+_define(@<__span>@,@<_param6>@)_C_
+.SH PARAMETERS
+_phead(__target)
+The separable filter to be retrieved.
+Must be
+_const(SEPARABLE_2D).
+_phead(__format)
+Format of the output images.
+Must be one of
+_const(RED),
+_const(GREEN),
+_const(BLUE),
+_const(ALPHA),
+_const(RGB),
+_const(BGR)
+_const(RGBA),
+_const(BGRA),
+_const(LUMINANCE), or
+_const(LUMINANCE_ALPHA).
+_phead(__type)
+Data type of components in the output images.
+Symbolic constants
+_const(UNSIGNED_BYTE),
+_const(BYTE),
+_const(BITMAP),
+_const(UNSIGNED_SHORT),
+_const(SHORT),
+_const(UNSIGNED_INT),
+_const(INT),
+_const(FLOAT),
+_const(UNSIGNED_BYTE_3_3_2),
+_const(UNSIGNED_BYTE_2_3_3_REV),
+_const(UNSIGNED_SHORT_5_6_5),
+_const(UNSIGNED_SHORT_5_6_5_REV),
+_const(UNSIGNED_SHORT_4_4_4_4),
+_const(UNSIGNED_SHORT_4_4_4_4_REV),
+_const(UNSIGNED_SHORT_5_5_5_1),
+_const(UNSIGNED_SHORT_1_5_5_5_REV),
+_const(UNSIGNED_INT_8_8_8_8),
+_const(UNSIGNED_INT_8_8_8_8_REV),
+_const(UNSIGNED_INT_10_10_10_2), and
+_const(UNSIGNED_INT_2_10_10_10_REV)
+are accepted.
+_phead(__row)
+Pointer to storage for the row filter image.
+_phead(__column)
+Pointer to storage for the column filter image.
+_phead(__span)
+Pointer to storage for the span filter image (currently unused).
+.SH DESCRIPTION
+_cmnd returns the two one-dimensional filter kernel images for the
+current separable 2D convolution filter.
+The row image is placed in __row and the column image is placed in
+__column according to the specifications in __format and __type.
+(In the current implementation, __span is not affected in any way.)
+No pixel transfer operations are performed on the images, but the relevant
+pixel storage modes are applied.
+.sp
+Color components that are present in __format but not included in the
+internal format of the filters are returned as zero.
+The assignments of internal color components to the components of __format
+are as follows:
+.sp
+
+.TS
+center;
+cb cb
+l l.
+_
+Internal Component Resulting Component
+_
+Red Red
+Green Green
+Blue Blue
+Alpha Alpha
+Luminance Red
+Intensity Red
+_
+.TE
+
+.SH NOTES
+_cmnd is present only if _arbstring(imaging) is returned when _cmnd(GetString)
+is called with an argument of _const(EXTENSIONS).
+.P
+Non-separable 2D filters must be retrieved with _cmnd(GetConvolutionFilter).
+.SH ERRORS
+_const(INVALID_ENUM) is generated if __target is not _const(SEPARABLE_2D).
+.P
+_const(INVALID_ENUM) is generated if __format is not one of the allowable
+values.
+.P
+_const(INVALID_ENUM) is generated if __type is not one of the allowable
+values.
+.P
+_const(INVALID_OPERATION) is generated if _cmnd is executed
+between the execution of _cmnd(Begin) and the corresponding
+execution of _cmnd(End).
+.P
+_const(INVALID_OPERATION) is generated if __type is one of
+_const(UNSIGNED_BYTE_3_3_2),
+_const(UNSIGNED_BYTE_2_3_3_REV),
+_const(UNSIGNED_SHORT_5_6_5), or
+_const(UNSIGNED_SHORT_5_6_5_REV)
+and __format is not _const(RGB).
+.P
+_const(INVALID_OPERATION) is generated if __type is one of
+_const(UNSIGNED_SHORT_4_4_4_4),
+_const(UNSIGNED_SHORT_4_4_4_4_REV),
+_const(UNSIGNED_SHORT_5_5_5_1),
+_const(UNSIGNED_SHORT_1_5_5_5_REV),
+_const(UNSIGNED_INT_8_8_8_8),
+_const(UNSIGNED_INT_8_8_8_8_REV),
+_const(UNSIGNED_INT_10_10_10_2), or
+_const(UNSIGNED_INT_2_10_10_10_REV)
+and __format is neither _const(RGBA) nor _const(BGRA).
+.SH ASSOCIATED GETS
+_cmnd(GetConvolutionParameter)
+.SH SEE ALSO
+_cmnd(GetConvolutionFilter),
+_cmnd(ConvolutionParameter),
+_cmnd(SeparableFilter2D)