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author | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
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committer | Reinhard Tartler <siretart@tauware.de> | 2011-10-10 17:43:39 +0200 |
commit | f4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch) | |
tree | 2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
download | nx-libs-nx-X11/3.1.0-1.tar.gz nx-libs-nx-X11/3.1.0-1.tar.bz2 nx-libs-nx-X11/3.1.0-1.zip |
Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:
Imported nx-X11-3.1.0-1.tar.gz
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Diffstat (limited to 'nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl')
-rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl new file mode 100644 index 000000000..97b113562 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/hint.gl @@ -0,0 +1,118 @@ +_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(Hint,specify implementation-specific hints) +_names(Hint) +.SH PARAMETERS +_phead(_param1) +Specifies a symbolic constant indicating the behavior to be controlled. +_const(FOG_HINT), +_const(LINE_SMOOTH_HINT), +_const(PERSPECTIVE_CORRECTION_HINT), +_const(POINT_SMOOTH_HINT), and +_const(POLYGON_SMOOTH_HINT) are accepted. +_phead(_param2) +Specifies a symbolic constant indicating the desired behavior. +_const(FASTEST), +_const(NICEST), and +_const(DONT_CARE) are accepted. +.SH DESCRIPTION +Certain aspects of GL behavior, +when there is room for interpretation, +can be controlled with hints. +A hint is specified with two arguments. +_param1 is a symbolic +constant indicating the behavior to be controlled, +and _param2 is another symbolic constant indicating the desired +behavior. The initial value for each _param1 is _const(DONT_CARE). +_param2 can be one of the following: +.TP 20 +_const(FASTEST) +The most efficient option should be chosen. +.TP +_const(NICEST) +The most correct, +or highest quality, +option should be chosen. +.TP +_const(DONT_CARE) +No preference. +.P +Though the implementation aspects that can be hinted are well defined, +the interpretation of the hints depends on the implementation. +The hint aspects that can be specified with _param1, +along with suggested semantics, +are as follows: +.TP 20 +_const(FOG_HINT) +Indicates the accuracy of fog calculation. +If per-pixel fog calculation is not efficiently supported +by the GL implementation, +hinting _const(DONT_CARE) or _const(FASTEST) can result in per-vertex +calculation of fog effects. +.TP +_const(LINE_SMOOTH_HINT) +Indicates the sampling quality of antialiased lines. +If a larger filter function is applied, hinting _const(NICEST) can +result in more pixel fragments being generated during rasterization, +.TP +_const(PERSPECTIVE_CORRECTION_HINT) +Indicates the quality of color and texture coordinate interpolation. +If perspective-corrected parameter interpolation is not efficiently supported +by the GL implementation, +hinting _const(DONT_CARE) or _const(FASTEST) can result in simple linear +interpolation of colors and/or texture coordinates. +.TP +_const(POINT_SMOOTH_HINT) +Indicates the sampling quality of antialiased points. +If a larger filter function is applied, hinting _const(NICEST) can +result in more pixel fragments being generated during rasterization, +.TP +_const(POLYGON_SMOOTH_HINT) +Indicates the sampling quality of antialiased polygons. +Hinting _const(NICEST) can result in more pixel fragments being generated +during rasterization, +if a larger filter function is applied. +.SH NOTES +The interpretation of hints depends on the implementation. +Some implementations ignore _cmnd(Hint) settings. +.SH ERRORS +_const(INVALID_ENUM) is generated if either _param1 or _param2 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). |