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The LXR Cross Referencer for SOS

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001 /* Copyright (C) 2004  David Decotigny
002 
003    This program is free software; you can redistribute it and/or
004    modify it under the terms of the GNU General Public License
005    as published by the Free Software Foundation; either version 2
006    of the License, or (at your option) any later version.
007    
008    This program is distributed in the hope that it will be useful,
009    but WITHOUT ANY WARRANTY; without even the implied warranty of
010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
011    GNU General Public License for more details.
012    
013    You should have received a copy of the GNU General Public License
014    along with this program; if not, write to the Free Software
015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
016    USA. 
017 */
018 #ifndef _SOS_X86_VIDEOMEM_H_
019 #define _SOS_X86_VIDEOMEM_H_
020 
021 /**
022  * @file x86_videomem.h
023  *
024  * On x86 PC platforms, the text mode screen memory (and CGA/EGA/VGA
025  * too) is mapped into physical memory. This file handles access to
026  * this screen, supposed to be set in text-mode, through this memory
027  * area. All the functions below print the characters directly to the
028  * memory, without interpreting the escaped characters (such as \n,
029  * \r...)
030  */
031 
032 #include <sos/errno.h>
033 
034 /**
035  * x86 video attributes
036  * See http://webster.cs.ucr.edu/AoA/DOS/ch23/CH23-1.html
037  */
038 /* Normal and Dark/Light foreground */
039 #define SOS_X86_VIDEO_FG_BLACK     0
040 #define SOS_X86_VIDEO_FG_DKGRAY    8
041 #define SOS_X86_VIDEO_FG_BLUE      1
042 #define SOS_X86_VIDEO_FG_LTBLUE    9
043 #define SOS_X86_VIDEO_FG_GREEN     2
044 #define SOS_X86_VIDEO_FG_LTGREEN   10
045 #define SOS_X86_VIDEO_FG_CYAN      3
046 #define SOS_X86_VIDEO_FG_LTCYAN    11
047 #define SOS_X86_VIDEO_FG_RED       4
048 #define SOS_X86_VIDEO_FG_LTRED     12
049 #define SOS_X86_VIDEO_FG_MAGENTA   5
050 #define SOS_X86_VIDEO_FG_LTMAGENTA 13
051 #define SOS_X86_VIDEO_FG_BROWN     6
052 #define SOS_X86_VIDEO_FG_YELLOW    14
053 #define SOS_X86_VIDEO_FG_LTGRAY    7
054 #define SOS_X86_VIDEO_FG_WHITE     15
055 /* Background */
056 #define SOS_X86_VIDEO_BG_BLACK     (0 << 4)
057 #define SOS_X86_VIDEO_BG_BLUE      (1 << 4)
058 #define SOS_X86_VIDEO_BG_GREEN     (2 << 4)
059 #define SOS_X86_VIDEO_BG_CYAN      (3 << 4)
060 #define SOS_X86_VIDEO_BG_RED       (4 << 4)
061 #define SOS_X86_VIDEO_BG_MAGENTA   (5 << 4)
062 #define SOS_X86_VIDEO_BG_BROWN     (6 << 4)
063 #define SOS_X86_VIDEO_BG_LTGRAY    (7 << 4)
064 /* Blinking */
065 #define SOS_X86_VIDEO_FG_BLINKING  (1 << 7)
066 
067 
068 /** Setup the video RAM mapping and clear the screen */
069 sos_ret_t sos_x86_videomem_setup(void);
070 
071 /** Clears the screen and set the background color as given by
072     attribute */
073 sos_ret_t sos_x86_videomem_cls(unsigned char attribute);
074 
075 /** Print the string on the scren with the given attribute. Does not
076     handle scrolling */
077 sos_ret_t sos_x86_videomem_putstring(unsigned char row, unsigned char col,
078                                      unsigned char attribute,
079                                      const char *str);
080 
081 /** Print the character on the scren with the given attribute. Does not
082     handle scrolling */
083 sos_ret_t sos_x86_videomem_putchar(unsigned char row, unsigned char col,
084                                    unsigned char attribute,
085                                    unsigned char c);
086 
087 /**
088  * Print the formatted string. Very restricted version of printf(3):
089  * 1/ can print max 255 chars, 2/ supports only %d/%i, %c, %s, %x
090  * without any support for flag charachters (eg %08x).
091  */
092 sos_ret_t sos_x86_videomem_printf(unsigned char row, unsigned char col,
093                                   unsigned char attribute,
094                                   const char *format, /* args */...)
095      __attribute__ ((format (printf, 4, 5)));
096 
097 #endif /* _SOS_X86_VIDEOMEM_H_ */

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