diff options
Diffstat (limited to 'nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/logicop.gl')
| -rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/logicop.gl | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/logicop.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/logicop.gl new file mode 100644 index 000000000..2f6d0b454 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/logicop.gl @@ -0,0 +1,129 @@ +_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|tbl)_C_ +_C_ eqn is automatically replaced with neqn for nroff +_header(LogicOp,specify a logical pixel operation for color index rendering) +_names(LogicOp) +.SH PARAMETERS +_phead(_param1) +Specifies a symbolic constant that selects a logical operation. +The following symbols are accepted: +_const(CLEAR), +_const(SET), +_const(COPY), +_const(COPY_INVERTED), +_const(NOOP), +_const(INVERT), +_const(AND), +_const(NAND), +_const(OR), +_const(NOR), +_const(XOR), +_const(EQUIV), +_const(AND_REVERSE), +_const(AND_INVERTED), +_const(OR_REVERSE), and +_const(OR_INVERTED). The initial value is _const(COPY). +.SH DESCRIPTION +_cmnd specifies a logical operation that, +when enabled, +is applied between the incoming color index or RGBA color +and the color index or RGBA color at the corresponding location in the +frame buffer. +To enable or disable the logical operation, call +_cmnd(Enable) and _cmnd(Disable) +using the symbolic constant _const(COLOR_LOGIC_OP) for RGBA mode or +_const(INDEX_LOGIC_OP) for color index mode. The initial value is +disabled for both operations. +.P +.ne +.TS +center; +lb lb +l c. +_ +Opcode Resulting Operation +_ +_const(CLEAR) 0 +_const(SET) 1 +_const(COPY) s +_const(COPY_INVERTED) ~s +_const(NOOP) d +_const(INVERT) ~d +_const(AND) s & d +_const(NAND) ~(s & d) +_const(OR) s | d +_const(NOR) ~(s | d) +_const(XOR) s ^ d +_const(EQUIV) ~(s ^ d) +_const(AND_REVERSE) s & ~d +_const(AND_INVERTED) ~s & d +_const(OR_REVERSE) s | ~d +_const(OR_INVERTED) ~s | d +_ +.TE + +_param1 is a symbolic constant chosen from the list above. +In the explanation of the logical operations, +\f2s\fP represents the incoming color index and +\f2d\fP represents the index in the frame buffer. +Standard C-language operators are used. +As these bitwise operators suggest, +the logical operation is applied independently to each bit pair of the +source and destination indices or colors. +.SH NOTES +Color index logical operations are always supported. RGBA logical +operations are supported only if the GL version is 1.1 or greater. +.P +When more than one RGBA color or index buffer is enabled for drawing, +logical operations are performed separately for each enabled buffer, +using for the destination value the contents of that buffer +(see _cmnd(DrawBuffer)). +.SH ERRORS +_const(INVALID_ENUM) is generated if _param1 is not an accepted value. +.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(LOGIC_OP_MODE). +.br +_cmnd(IsEnabled) with argument _const(COLOR_LOGIC_OP) or _const(INDEX_LOGIC_OP). +.SH SEE ALSO +_cmnd(AlphaFunc), +_cmnd(BlendFunc), +_cmnd(DrawBuffer), +_cmnd(Enable), +_cmnd(StencilOp) |