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diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/linewidth.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/linewidth.gl new file mode 100644 index 000000000..e8957cefc --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/linewidth.gl @@ -0,0 +1,113 @@ +_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,eqn)_C_ +_C_ eqn is automatically replaced with neqn for nroff +_header(LineWidth,specify the width of rasterized lines) +_names(LineWidth) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1) +Specifies the width of rasterized lines. +The initial value is 1. +.SH DESCRIPTION +_cmnd specifies the rasterized width of both aliased and antialiased +lines. +Using a line width other than 1 has different effects, +depending on whether line antialiasing is enabled. +To enable and disable line antialiasing, call +_cmnd(Enable) and _cmnd(Disable) +with argument _const(LINE_SMOOTH). Line antialiasing is initially +disabled. +.P +If line antialiasing is disabled, +the actual width is determined by rounding the supplied width +to the nearest integer. +(If the rounding results in the value 0, +it is as if the line width were 1.) +If +$| DELTA x | ~>=~ | DELTA y |$, +\f2i\fP pixels are filled in each column that is rasterized, +where \f2i\fP is the rounded value of _param1. +Otherwise, +\f2i\fP pixels are filled in each row that is rasterized. +.P +If antialiasing is enabled, +line rasterization produces a fragment for each pixel square +that intersects the region lying within the rectangle having width +equal to the current line width, +length equal to the actual length of the line, +and centered on the mathematical line segment. +The coverage value for each fragment is the window coordinate area +of the intersection of the rectangular region with the corresponding +pixel square. +This value is saved and used in the final rasterization step. +.P +Not all widths can be supported when line antialiasing is enabled. If an +unsupported width is requested, the nearest supported width is used. +Only width 1 is guaranteed to be supported; others depend on the +implementation. Likewise, there is a range for aliased line widths as well. +To query the range of supported widths and the size +difference between supported widths within the range, call _cmnd(Get) +with arguments _const(ALIASED_LINE_WIDTH_RANGE), +_const(SMOOTH_LINE_WIDTH_RANGE), _const(SMOOTH_LINE_WIDTH_GRANULARITY). +.SH NOTES +The line width specified by _cmnd is always returned when _const(LINE_WIDTH) +is queried. +Clamping and rounding for aliased and antialiased lines have no effect +on the specified value. +.P +Nonantialiased line width may be clamped to an implementation-dependent +maximum. Call _cmnd(Get) with _const(ALIASED_LINE_WIDTH_RANGE) to +determine the maximum width. +.SH ERRORS +_const(INVALID_VALUE) is generated if _param1 is less than or equal to 0. +.P +_const(INVALID_OPERATION) is generated if _cmnd +is executed between the execution of _cmnd(Begin) +and the corresponding execution of _cmnd(End). +.SH ASSOCIATED GETS +_cmnd(Get) with argument _const(LINE_WIDTH) +.br +_cmnd(Get) with argument _const(ALIASED_LINE_WIDTH_RANGE) +.br +_cmnd(Get) with argument _const(SMOOTH_LINE_WIDTH_RANGE) +.br +_cmnd(Get) with argument _const(SMOOTH_LINE_WIDTH_GRANULARITY) +.br +_cmnd(IsEnabled) with argument _const(LINE_SMOOTH) +.SH SEE ALSO +_cmnd(Enable) |