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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/minmax.gl | |
parent | a840692edc9c6d19cd7c057f68e39c7d95eb767d (diff) | |
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz
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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/minmax.gl')
-rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/minmax.gl | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/minmax.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/minmax.gl new file mode 100644 index 000000000..e177e0139 --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/minmax.gl @@ -0,0 +1,134 @@ +_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(Minmax,define minmax table) +_names(Minmax) +_define(@<__target>@,@<_param1>@)_C_ +_define(@<__internalformat>@,@<_param2>@)_C_ +_define(@<__sink>@,@<_param3>@)_C_ +.SH PARAMETERS +_phead(__target) +The minmax table whose parameters are to be set. +Must be +_const(MINMAX). +_phead(__internalformat) +The format of entries in the minmax table. +Must be one of +_const(ALPHA), +_const(ALPHA4), +_const(ALPHA8), +_const(ALPHA12), +_const(ALPHA16), +_const(LUMINANCE), +_const(LUMINANCE4), +_const(LUMINANCE8), +_const(LUMINANCE12), +_const(LUMINANCE16), +_const(LUMINANCE_ALPHA), +_const(LUMINANCE4_ALPHA4), +_const(LUMINANCE6_ALPHA2), +_const(LUMINANCE8_ALPHA8), +_const(LUMINANCE12_ALPHA4), +_const(LUMINANCE12_ALPHA12), +_const(LUMINANCE16_ALPHA16), +_const(R3_G3_B2), +_const(RGB), +_const(RGB4), +_const(RGB5), +_const(RGB8), +_const(RGB10), +_const(RGB12), +_const(RGB16), +_const(RGBA), +_const(RGBA2), +_const(RGBA4), +_const(RGB5_A1), +_const(RGBA8), +_const(RGB10_A2), +_const(RGBA12), or +_const(RGBA16). +_phead(__sink) +If _const(TRUE), pixels will be consumed by the minmax +process and no drawing or texture loading will take place. +If _const(FALSE), pixels will proceed to the final conversion process after +minmax. +.SH DESCRIPTION +When _const(MINMAX) is enabled, the RGBA components of incoming pixels are +compared to the minimum and maximum values for each component, which are +stored in the 2-element minmax table. +(The first element stores the minima, and the second element stores +the maxima.) +If a pixel component is greater than the corresponding component +in the maximum element, then the maximum element is updated with the +pixel component value. +If a pixel component is less than the corresponding component in +the minimum element, then the minimum element is updated with the +pixel component value. +(In both cases, if the internal format of the minmax table includes +luminance, then the R color component of incoming pixels is used +for comparison.) +The contents of the minmax table may be retrieved at a later time +by calling _cmnd(GetMinmax). +The minmax operation is enabled or disabled by calling _cmnd(Enable) or +_cmnd(Disable), respectively, with an argument of _const(MINMAX). +.P +_cmnd redefines the current minmax table to have entries of the format +specified by __internalformat. +The maximum element is initialized with the smallest possible component +values, and the minimum element is initialized with the largest possible +component values. +The values in the previous minmax table, if any, are lost. +If __sink is _const(TRUE), then pixels are discarded after minmax; +no further processing of the pixels takes place, and no drawing, +texture loading, or pixel readback will result. +.P +.SH NOTES +_cmnd is present only if _arbstring(imaging) is returned when _cmnd(GetString) +is called with an argument of _const(EXTENSIONS). +.SH ERRORS +_const(INVALID_ENUM) is generated if __target is not one of the allowable +values. +.P +_const(INVALID_ENUM) is generated if __internalformat 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). +.SH ASSOCIATED GETS +_cmnd(GetMinmaxParameter) +.SH SEE ALSO +_cmnd(GetMinmax), +_cmnd(ResetMinmax) |