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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/bitmap.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/bitmap.gl')
-rw-r--r-- | nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/bitmap.gl | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/bitmap.gl b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/bitmap.gl new file mode 100644 index 000000000..bd628ae9f --- /dev/null +++ b/nx-X11/extras/ogl-sample/main/doc/man/mangl/standard/bitmap.gl @@ -0,0 +1,138 @@ +_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|eqn)_C_ +_header(Bitmap,draw a bitmap) +_names(Bitmap) +.EQ +delim $$ +.EN +.SH PARAMETERS +_phead(_param1 _param2) +Specify the pixel width and height of the bitmap image. +_phead(_param3 _param4) +Specify the location of the origin in the bitmap image. +The origin is measured from the lower left corner of the bitmap, +with right and up being the positive axes. +_phead(_param5 _param6) +Specify the \f2x\fP and \f2y\fP offsets to be added to the current raster position +after the bitmap is drawn. +_phead(_param7) +Specifies the address of the bitmap image. +.SH DESCRIPTION +A bitmap is a binary image. +When drawn, +the bitmap is positioned relative to the current raster position, +and frame buffer pixels corresponding to 1's in the bitmap are +written using the current raster color or index. +Frame buffer pixels corresponding to 0's in the bitmap are not modified. +.P +_cmnd takes seven arguments. +The first pair specifies the width and height of the bitmap image. +The second pair specifies the location of the bitmap origin relative +to the lower left corner of the bitmap image. +The third pair of arguments specifies \f2x\fP and \f2y\fP offsets to be added +to the current raster position after the bitmap has been drawn. +The final argument is a pointer to the bitmap image itself. +.P +The bitmap image is interpreted like image data for the _cmnd(DrawPixels) +command, +with _param1 and _param2 corresponding to the width and height arguments +of that command, +and with \f2type\fP set to _const(BITMAP) +and \f2format\fP set to _const(COLOR_INDEX). +.BP +Modes specified using _cmnd(PixelStore) affect the +interpretation of bitmap image data; +modes specified using _cmnd(PixelTransfer) do not. +.P +If the current raster position is invalid, _cmnd is ignored. +Otherwise, +the lower left corner of the bitmap image is positioned at the window coordinates +.ce +.sp +$ x sub w ~=~ \(lf ~ x sub r ~-~ x sub o ~ \(rf $ +.br +.sp +.ce +$ y sub w ~=~ \(lf ~ y sub r ~-~ y sub o ~ \(rf $ +.sp +where $ ( x sub r , y sub r ) $ is the raster position +and $ ( x sub o , y sub o ) $ is the bitmap origin. +Fragments are then generated for each pixel corresponding to a 1 (one) +in the bitmap image. +These fragments are generated using the current raster \f2z\fP coordinate, +color or color index, and current raster texture coordinates. +They are then treated just as if they had been generated +by a point, line, or polygon, +including texture mapping, +.br +fogging, +and all per-fragment operations such as alpha and depth testing. +.P +After the bitmap has been drawn, +the \f2x\fP and \f2y\fP coordinates of the current raster position are offset by +_param5 and _param6. +No change is made to the \f2z\fP coordinate of the current raster position, +or to the current raster color, texture coordinates, or index. +.SH NOTES +To set a valid raster position outside the viewport, first set a valid +raster position inside the viewport, then call _cmnd(Bitmap) with NULL +as the _param7 parameter and with _param5 and _param6 set to +the offsets of the new raster position. This technique is useful when +panning an image around the viewport. +.SH ERRORS +_const(INVALID_VALUE) is generated if _param1 or _param2 is negative. +.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(CURRENT_RASTER_POSITION) +.br +_cmnd(Get) with argument _const(CURRENT_RASTER_COLOR) +.br +_cmnd(Get) with argument _const(CURRENT_RASTER_DISTANCE) +.br +_cmnd(Get) with argument _const(CURRENT_RASTER_INDEX) +.br +_cmnd(Get) with argument _const(CURRENT_RASTER_TEXTURE_COORDS) +.br +_cmnd(Get) with argument _const(CURRENT_RASTER_POSITION_VALID) +.SH SEE ALSO +_cmnd(DrawPixels), +_cmnd(PixelStore), +_cmnd(PixelTransfer), +_cmnd(RasterPos) + |