1997-08-17 21:09:35 +00:00
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.\" Copyright (c) 1997 S<>ren Schmidt
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.\" All rights reserved.
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2001-07-15 07:53:42 +00:00
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.\"
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1997-08-17 21:09:35 +00:00
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer,
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.\" in this position and unchanged.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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2001-08-07 12:47:57 +00:00
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.\" derived from this software without specific prior written permission.
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2001-07-15 07:53:42 +00:00
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.\"
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1997-08-17 21:09:35 +00:00
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2001-07-15 07:53:42 +00:00
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.\"
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1999-08-28 00:22:10 +00:00
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.\" $FreeBSD$
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1999-11-08 11:37:46 +00:00
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.Dd November 7, 1999
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1997-08-17 21:09:35 +00:00
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.Dt VGL 3
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2001-07-10 13:41:46 +00:00
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.Os
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1997-08-17 21:09:35 +00:00
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.Sh NAME
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1999-11-08 11:37:46 +00:00
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.Nm VGLBitmapAllocateBits ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLBitmapCopy ,
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1999-11-08 11:37:46 +00:00
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.Nm VGLBitmapCreate ,
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.Nm VGLBitmapDestroy ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLBitmapPutChar ,
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.Nm VGLBitmapString ,
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.Nm VGLBlankDisplay ,
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.Nm VGLBox ,
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.Nm VGLCheckSwitch ,
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.Nm VGLClear ,
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.Nm VGLEllipse ,
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.Nm VGLEnd ,
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.Nm VGLFilledBox ,
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.Nm VGLFilledEllipse ,
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1999-12-13 10:48:22 +00:00
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.Nm VGLGetXY ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLInit ,
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.Nm VGLLine ,
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1999-11-08 11:37:46 +00:00
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.Nm VGLKeyboardInit ,
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.Nm VGLKeyboardEnd ,
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.Nm VGLKeyboardGetCh ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLMouseInit ,
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.Nm VGLMouseMode ,
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.Nm VGLMouseSetImage ,
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.Nm VGLMouseSetStdImage ,
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.Nm VGLMouseStatus ,
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1999-11-08 11:37:46 +00:00
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.Nm VGLPanScreen ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLSetBorder ,
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.Nm VGLSetPalette ,
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.Nm VGLSetPaletteIndex ,
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1999-11-08 11:37:46 +00:00
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.Nm VGLSetVScreenSize ,
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1999-12-13 10:48:22 +00:00
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.Nm VGLSetXY ,
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1999-10-28 15:51:50 +00:00
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.Nm VGLTextSetFontFile
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2000-04-22 16:17:38 +00:00
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.Nd Video Graphics Library functions
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.Sh LIBRARY
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.Lb libvgl
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1997-08-17 21:09:35 +00:00
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.Sh SYNOPSIS
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2000-10-08 21:34:00 +00:00
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.Fd #include <sys/fbio.h>
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.Fd #include <sys/consio.h>
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.Fd #include <sys/kbio.h>
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1997-08-17 21:09:35 +00:00
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.Fd #include <vgl.h>
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1999-10-28 15:51:50 +00:00
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.Ft int
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.Fn VGLInit "int mode"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLEnd "void"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLCheckSwitch "void"
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2001-07-15 07:53:42 +00:00
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.Ft int
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1999-10-28 15:51:50 +00:00
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.Fn VGLTextSetFontFile "char *filename"
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1999-11-08 11:37:46 +00:00
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.Ft int
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.Fn VGLKeyboardInit "int code"
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.Ft void
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.Fn VGLKeyboardEnd "void"
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.Ft int
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.Fn VGLKeyboardGetCh "void"
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2001-07-15 07:53:42 +00:00
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.Ft int
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1999-10-28 15:51:50 +00:00
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.Fn VGLMouseInit "int mode"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLMouseMode "int mode"
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2001-07-15 07:53:42 +00:00
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.Ft int
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1999-10-28 15:51:50 +00:00
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.Fn VGLMouseStatus "int *x" "int *y" "char *buttons"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLMouseSetImage "VGLBitmap *AndMask" "VGLBitmap *OrMask"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLMouseSetStdImage "void"
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2001-07-15 07:53:42 +00:00
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.Ft byte
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1999-12-13 10:48:22 +00:00
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.Fn VGLGetXY "VGLBitmap *object" "int x" "int y"
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2001-07-15 07:53:42 +00:00
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.Ft void
|
1999-12-13 10:48:22 +00:00
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.Fn VGLSetXY "VGLBitmap *object" "int x" "int y" "byte color"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLLine "VGLBitmap *object" "int x1" "int y1" "int x2" "int y2" "byte color"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLBox "VGLBitmap *object" "int x1" "int y1" "int x2" "int y2" "byte color"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLFilledBox "VGLBitmap *object" "int x1" "int y1" "int x2" "int y2" "byte color"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLEllipse "VGLBitmap *object" "int xc" "int yc" "int a" "int b" "byte color"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLFilledEllipse "VGLBitmap *object" "int xc" "int yc" "int a" "int b" "byte color"
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1999-11-08 11:37:46 +00:00
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.Ft VGLBitmap *
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.Fn VGLBitmapCreate "int type" "int xsize" "int ysize" "byte *bits"
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.Ft void
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.Fn VGLBitmapDestroy "VGLBitmap *object"
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.Ft int
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.Fn VGLBitmapAllocateBits "VGLBitmap *object"
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2001-07-15 07:53:42 +00:00
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.Ft int
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1999-10-28 15:51:50 +00:00
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.Fn VGLBitmapCopy "VGLBitmap *src" "int srcx" "int srcy" "VGLBitmap *dst" "int dstx" "int dsty" "int width" "int hight"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLBitmapPutChar "VGLBitmap *Object" "int x" "int y" "byte ch" "byte fgcol" "byte bgcol" "int fill" "int dir"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLBitmapString "VGLBitmap *Object" "int x" "int y" "char *str" "byte fgcol" "byte bgcol" "int fill" "int dir"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLClear "VGLBitmap *object" "byte color"
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.Ft void
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.Fn VGLSetPalette "byte *red" "byte *green" "byte *blue"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLSetPaletteIndex "byte color" "byte red" "byte green" "byte blue"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLSetBorder "byte color"
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1999-11-08 11:37:46 +00:00
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.Ft int
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.Fn VGLSetVScreenSize "VGLBitmap *object" "int vxsize" "int vysize"
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.Ft int
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1999-12-23 16:56:27 +00:00
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.Fn VGLPanScreen "VGLBitmap *object" "int x" "int y"
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2001-07-15 07:53:42 +00:00
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.Ft void
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1999-10-28 15:51:50 +00:00
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.Fn VGLBlankDisplay "int blank"
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1997-08-17 21:09:35 +00:00
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.Sh DESCRIPTION
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1999-10-28 15:51:50 +00:00
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.Nm Libvgl
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is a library that enables the programmer access to the graphics
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1997-08-17 21:09:35 +00:00
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modes supported by the console driver (syscons). The library takes care of
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programming the actual video hardware, and provides a number of simple
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2000-03-02 09:14:21 +00:00
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functions to do various graphic operations.
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There is also support for a
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1999-10-28 15:51:50 +00:00
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mouse via the standard mouse system in
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.Fx ,
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see
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.Xr mouse 4 ,
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including the ability to transparently have a mouse pointer superimposed on
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2001-07-15 07:53:42 +00:00
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the graphic image currently being worked on.
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1997-10-22 23:12:27 +00:00
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The library takes care of screen switching by storing the current image in
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memory before switching to another virtual console, and restoring when the
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2000-03-02 09:14:21 +00:00
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user switches back.
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This allows several graphic applications at once, but
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1997-08-17 21:09:35 +00:00
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on different virtual consoles.
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2000-12-29 14:08:20 +00:00
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.Pp
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1997-08-17 21:09:35 +00:00
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Below is a short description of the various functions:
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1999-10-28 15:51:50 +00:00
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.Pp
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.Fn VGLInit
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initialize the library and set up the graphic mode
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2000-01-05 15:16:32 +00:00
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.Va mode .
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1999-10-28 15:51:50 +00:00
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.Pp
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.Fn VGLEnd
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terminate graphic mode, and restore the screenmode that was active before
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1997-08-17 21:09:35 +00:00
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.Fn VGLInit
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was called.
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1999-10-28 15:51:50 +00:00
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.Pp
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.Fn VGLCheckSwitch
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if the program goes into longer periods of processing without doing
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2001-07-15 07:53:42 +00:00
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any graphics output, calling this function occasionally will allow
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1997-08-17 21:09:35 +00:00
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the system to switch screens.
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1999-10-28 15:51:50 +00:00
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.Pp
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2001-07-15 07:53:42 +00:00
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.Fn VGLTextSetFontFile
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1999-10-28 15:51:50 +00:00
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instruct the char/string functions to use the font in file
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2000-01-05 15:16:32 +00:00
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.Pa filename
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1997-10-22 23:12:27 +00:00
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instead of the builtin font.
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1999-10-28 15:51:50 +00:00
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.Pp
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1999-11-08 11:37:46 +00:00
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.Fn VGLKeyboardInit
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2000-01-05 15:16:32 +00:00
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set up the keyboard in the
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.Dq raw
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I/O mode and
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1999-11-08 11:37:46 +00:00
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specify the key code to be used.
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2000-01-05 15:16:32 +00:00
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.Va code
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1999-11-08 11:37:46 +00:00
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must be
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2000-01-05 15:16:32 +00:00
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.Dv VGL_XLATEKEYS ,
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.Dv VGL_CODEKEYS ,
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1999-11-08 11:37:46 +00:00
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or
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2000-01-05 15:16:32 +00:00
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.Dv VGL_RAWKEYS .
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2001-07-15 07:53:42 +00:00
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When
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2000-01-05 15:16:32 +00:00
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.Dv VGL_XLATEKEYS
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1999-11-08 11:37:46 +00:00
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is specified, the keyboard translate the raw keyboard scan code into
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a character code.
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If
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2000-01-05 15:16:32 +00:00
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.Dv VGL_RAWKEYS
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1999-11-08 11:37:46 +00:00
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is used, the raw keyboard scan code is read as is.
|
2000-01-05 15:16:32 +00:00
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.Dv VGL_CODEKEYS
|
1999-11-08 11:37:46 +00:00
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is the intermediate key code; each key is assigned a unique code whereas
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more than one raw scan code may be generated when a key is pressed.
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.Pp
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.Fn VGLKeyboardEnd
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when you have finished using the keyboard, call this function.
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.Pp
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.Fn VGLKeyboardGetCh
|
2000-01-05 15:16:32 +00:00
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read one byte from the keyboard. As the keyboard I/O is in the
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.Dq raw
|
1999-11-08 11:37:46 +00:00
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input mode, the function will not block even if there is no input data,
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and returns 0.
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.Pp
|
2001-07-15 07:53:42 +00:00
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.Fn VGLMouseInit
|
2000-03-02 09:14:21 +00:00
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initialize the mouse.
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The optional on-screen mouse pointer is shown if the
|
2001-07-15 07:53:42 +00:00
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argument is
|
2000-01-05 15:16:32 +00:00
|
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.Dv VGL_MOUSESHOW .
|
1999-10-28 15:51:50 +00:00
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.Pp
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.Fn VGLMouseMode
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either shows the mouse pointer if the argument is
|
2000-01-05 15:16:32 +00:00
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.Dv VGL_MOUSESHOW ,
|
1999-10-28 15:51:50 +00:00
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or hides the mouse pointer if the argument is
|
2000-01-05 15:16:32 +00:00
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.Dv VGL_MOUSEHIDE .
|
1999-10-28 15:51:50 +00:00
|
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.Pp
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.Fn VGLMouseStatus
|
|
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|
returns the current mouse pointer coordinates and button state in
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x , y ,
|
2000-03-02 09:14:21 +00:00
|
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buttons.
|
2001-07-15 07:53:42 +00:00
|
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|
The return value reflects if the mouse pointer
|
1997-08-17 21:09:35 +00:00
|
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|
is currently shown on screen or not.
|
1999-10-28 15:51:50 +00:00
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.Pp
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.Fn VGLMouseSetImage
|
|
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|
with this function it is possible to change the image of the mouse pointer
|
1997-08-17 21:09:35 +00:00
|
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|
on screen.
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLMouseSetStdImage
|
|
|
|
|
this function restores the mouse pointer to the standard arrow.
|
|
|
|
|
.Pp
|
1999-12-13 10:48:22 +00:00
|
|
|
|
.Fn VGLGetXY
|
|
|
|
|
retrieves the color of the pixel located at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x , y ,
|
1999-12-13 10:48:22 +00:00
|
|
|
|
coordinates of the
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va object
|
1999-12-13 10:48:22 +00:00
|
|
|
|
argument, and returns it as a byte value.
|
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLSetXY
|
|
|
|
|
sets the color of the pixel located at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x , y ,
|
1999-12-13 10:48:22 +00:00
|
|
|
|
coordinates of the
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va object
|
1999-12-13 10:48:22 +00:00
|
|
|
|
argument to
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color
|
1999-12-13 10:48:22 +00:00
|
|
|
|
byte value.
|
|
|
|
|
.Pp
|
2001-07-15 07:53:42 +00:00
|
|
|
|
.Fn VGLLine
|
1999-10-28 15:51:50 +00:00
|
|
|
|
draw a line from
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x1 , y1
|
1997-08-17 21:09:35 +00:00
|
|
|
|
to
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x2 , y2
|
1997-08-17 21:09:35 +00:00
|
|
|
|
in color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLBox
|
|
|
|
|
draw a box with upper left hand corner at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x1 , y1
|
1997-08-17 21:09:35 +00:00
|
|
|
|
and lower right hand corner at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x2 , y2
|
1997-08-17 21:09:35 +00:00
|
|
|
|
in color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLFilledBox
|
|
|
|
|
draw a filled (solid) box with upper left hand corner at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x1 , y1
|
1997-08-17 21:09:35 +00:00
|
|
|
|
and lower right hand corner at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x2 , y2
|
1997-08-17 21:09:35 +00:00
|
|
|
|
in color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
2001-07-15 07:53:42 +00:00
|
|
|
|
.Fn VGLEllipse
|
|
|
|
|
draw an ellipse centered at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va xc , yc
|
2001-07-15 07:53:42 +00:00
|
|
|
|
make it
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va a
|
2001-07-15 07:53:42 +00:00
|
|
|
|
pixels wide, and
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va b
|
1997-08-17 21:09:35 +00:00
|
|
|
|
pixels high in color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLFilledEllipse
|
2001-07-15 07:53:42 +00:00
|
|
|
|
draw a filled (solid) ellipse centered at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va xc , yc
|
2001-07-15 07:53:42 +00:00
|
|
|
|
make it
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va a
|
2001-07-15 07:53:42 +00:00
|
|
|
|
pixels wide, and
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va b
|
1997-08-17 21:09:35 +00:00
|
|
|
|
pixels high in color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
1999-11-08 11:37:46 +00:00
|
|
|
|
.Fn VGLBitmapCreate
|
2001-07-15 07:53:42 +00:00
|
|
|
|
create a bitmap object and initialize it with the specified
|
|
|
|
|
values and bit data.
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va type
|
1999-11-08 11:37:46 +00:00
|
|
|
|
must be
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Dv MEMBUF
|
1999-11-08 11:37:46 +00:00
|
|
|
|
for the in-memory bitmap.
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va bits
|
1999-11-08 11:37:46 +00:00
|
|
|
|
may be NULL so that bitmap data may be associated later.
|
|
|
|
|
.Pp
|
2001-07-15 07:53:42 +00:00
|
|
|
|
There also is a macro,
|
1999-11-08 11:37:46 +00:00
|
|
|
|
.Fn VGLBITMAP_INITIALIZER "type" "xsize" "ysize" "bits"
|
|
|
|
|
to initialize a statically declared bitmap object.
|
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLBitmapDestroy
|
|
|
|
|
free the bitmap data and the bitmap object.
|
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLBitmapAllocateBits
|
|
|
|
|
allocate a bit data buffer for the specified object.
|
|
|
|
|
.Pp
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Fn VGLBitmapCopy
|
|
|
|
|
copy a rectangle of pixels from bitmap
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va src
|
2001-07-15 07:53:42 +00:00
|
|
|
|
upper left hand corner at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va srcx , srcy
|
1997-08-17 21:09:35 +00:00
|
|
|
|
to bitmap
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va dst
|
2001-07-15 07:53:42 +00:00
|
|
|
|
at
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va dstx , dsty
|
1997-08-17 21:09:35 +00:00
|
|
|
|
of the size
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va width , height .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLBitmapPutChar
|
|
|
|
|
write the character
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va ch
|
1997-08-17 21:09:35 +00:00
|
|
|
|
at position
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x , y
|
2001-07-15 07:53:42 +00:00
|
|
|
|
in foreground color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va fgcol .
|
2001-07-15 07:53:42 +00:00
|
|
|
|
If
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va fill
|
1997-08-17 21:09:35 +00:00
|
|
|
|
is != 0, use the color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va bgcol
|
1997-10-16 09:12:31 +00:00
|
|
|
|
as background otherwise the background is transparent.
|
1997-08-17 21:09:35 +00:00
|
|
|
|
The character is drawn in the direction specified by the argument
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va dir .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLBitmapString
|
|
|
|
|
write the string
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va str
|
1997-08-17 21:09:35 +00:00
|
|
|
|
at position
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va x , y
|
2001-07-15 07:53:42 +00:00
|
|
|
|
in foreground color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va fgcol .
|
2001-07-15 07:53:42 +00:00
|
|
|
|
If
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va fill
|
1997-08-17 21:09:35 +00:00
|
|
|
|
is != 0, use the color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va bgcol
|
1997-10-22 23:12:27 +00:00
|
|
|
|
as background otherwise the background is transparent.
|
1997-08-17 21:09:35 +00:00
|
|
|
|
The string is drawn in the direction specified by the argument
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va dir .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLClear
|
|
|
|
|
clears the entire bitmap to color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLSetPalette
|
|
|
|
|
this function sets the palette used, the arguments
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va red , green , blue
|
1997-08-17 21:09:35 +00:00
|
|
|
|
should point to byte arrays of 256 positions each.
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLSetPaletteIndex
|
2001-07-15 07:53:42 +00:00
|
|
|
|
set the palette index
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color
|
1997-08-17 21:09:35 +00:00
|
|
|
|
to the specified RGB value.
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLSetBorder
|
|
|
|
|
set the border color to color
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va color .
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Pp
|
1999-11-08 11:37:46 +00:00
|
|
|
|
.Fn VGLSetVScreenSize
|
|
|
|
|
change the virtual screen size of the display. Note that this
|
2001-07-15 07:53:42 +00:00
|
|
|
|
function must be called when our vty is in the foreground.
|
1999-11-08 11:37:46 +00:00
|
|
|
|
And
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va object
|
1999-11-08 11:37:46 +00:00
|
|
|
|
must be
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va VGLDisplay .
|
1999-11-08 11:37:46 +00:00
|
|
|
|
Passing a in-memory bitmap to this function results in error.
|
|
|
|
|
.Pp
|
|
|
|
|
The desired virtual screen width may not be achievable because
|
|
|
|
|
of the video card hardware. In such case the video driver (and
|
|
|
|
|
underlaying video BIOS) may choose the next largest values.
|
2001-07-15 07:53:42 +00:00
|
|
|
|
Always examine
|
|
|
|
|
.Va object->VXsize
|
|
|
|
|
and
|
|
|
|
|
.Va VYsize
|
|
|
|
|
after calling this function, in order to see how the virtual screen
|
1999-11-08 11:37:46 +00:00
|
|
|
|
is actually set up.
|
|
|
|
|
.Pp
|
|
|
|
|
In order to set up the largest possible virtual screen, you may
|
|
|
|
|
call this function with arbitrary large values.
|
|
|
|
|
.Pp
|
|
|
|
|
.Dl VGLSetVScreenSize(10000, 10000);
|
|
|
|
|
.Pp
|
|
|
|
|
.Fn VGLPanSreen
|
|
|
|
|
change the origin of the displayed screen in the virtual screen.
|
2001-07-15 07:53:42 +00:00
|
|
|
|
Note that this function must be called when our vty is in the
|
|
|
|
|
foreground.
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va object
|
1999-11-08 11:37:46 +00:00
|
|
|
|
must be
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va VGLDisplay .
|
1999-11-08 11:37:46 +00:00
|
|
|
|
Passing a in-memory bitmap to this function results in error.
|
|
|
|
|
.Pp
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Fn VGLBlankDisplay
|
2001-08-07 12:47:57 +00:00
|
|
|
|
blank the display if the argument
|
2000-01-05 15:16:32 +00:00
|
|
|
|
.Va blank
|
1997-10-22 23:12:27 +00:00
|
|
|
|
!= 0. This can be done to shut off the screen during display updates that
|
|
|
|
|
the user should first see when it's done.
|
2001-07-26 08:46:47 +00:00
|
|
|
|
.Ss Program termination and signal processing
|
|
|
|
|
It is important to call
|
|
|
|
|
.Fn VGLEnd
|
|
|
|
|
before terminating the program.
|
|
|
|
|
Care must be taken if you install signal handlers and try to call
|
|
|
|
|
.Fn VGLEnd
|
|
|
|
|
and
|
|
|
|
|
.Xr exit 3
|
|
|
|
|
to end the program.
|
|
|
|
|
If a signal is caught while the program is inside
|
|
|
|
|
.Nm libvgl
|
|
|
|
|
functions,
|
|
|
|
|
.Fn VGLEnd
|
|
|
|
|
may not be able to properly restore the graphics hardware.
|
|
|
|
|
.Pp
|
|
|
|
|
The recommended way to handle signals and program termination is to
|
2001-07-26 09:46:08 +00:00
|
|
|
|
have a flag to indicate signal's delivery.
|
|
|
|
|
Your signal handlers set this flag but do not terminate
|
2001-07-26 08:46:47 +00:00
|
|
|
|
the program immediately.
|
|
|
|
|
The main part of the program checks the flag to see if it is
|
2001-08-07 12:47:57 +00:00
|
|
|
|
supposed to terminate, and calls
|
2001-07-26 08:46:47 +00:00
|
|
|
|
.Fn VGLEnd
|
|
|
|
|
and
|
|
|
|
|
.Xr exit 3
|
|
|
|
|
if the flag is set.
|
|
|
|
|
.Pp
|
|
|
|
|
Note that
|
|
|
|
|
.Fn VGLInit
|
|
|
|
|
installs its internal signal handlers for
|
|
|
|
|
.Dv SIGINT , SIGTERM , SIGSEGV ,
|
|
|
|
|
and
|
|
|
|
|
.Dv SIGBUS ,
|
|
|
|
|
and terminates the program at appropriate time,
|
|
|
|
|
after one of these signals is caught.
|
|
|
|
|
If you want to have your own signal handlers for these signals,
|
2001-07-26 09:46:08 +00:00
|
|
|
|
install handlers
|
2001-07-26 08:46:47 +00:00
|
|
|
|
.Em after
|
|
|
|
|
.Fn VGLInit .
|
|
|
|
|
.Pp
|
|
|
|
|
.Dv SIGUSR1
|
|
|
|
|
and
|
|
|
|
|
.Dv SIGUSR2
|
|
|
|
|
are internally used by
|
|
|
|
|
.Nm libvgl
|
|
|
|
|
to control screen switching and the mouse pointer,
|
|
|
|
|
and are not available to
|
|
|
|
|
.Nm libvgl
|
|
|
|
|
client programs.
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Sh AUTHORS
|
2000-11-14 13:09:12 +00:00
|
|
|
|
.An S\(/oren Schmidt Aq sos@FreeBSD.org
|
1997-08-17 21:09:35 +00:00
|
|
|
|
.Sh HISTORY
|
2001-07-15 07:53:42 +00:00
|
|
|
|
The
|
1999-10-28 15:51:50 +00:00
|
|
|
|
.Nm vgl
|
|
|
|
|
library appeared in
|
1999-10-30 19:29:45 +00:00
|
|
|
|
.Fx 3.0 .
|