kernel2/include/vga.h

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #ifndef _SCREEN_H_
  20 #define _SCREEN_H_
  21
  22 #include <stdint.h>
  23
  24 /// Videotext Address
  25 #define VGA_TEXT_ADDRESS       0xB8000
  26 /// 80 cols (chars per line)
  27 #define VGA_TEXT_WIDTH         80
  28 /// 25 rows (lines)
  29 #define VGA_TEXT_HEIGHT        25
  30 /// 2 bytes per char
  31 #define VGA_TEXT_BPC           sizeof(vga_text_char_t)
  32 /// Size of VGA text buffer
  33 #define VGA_TEXT_SIZE          (VGA_TEXT_WIDTH*VGA_TEXT_HEIGHT*VGA_TEXT_BPC)
  34 /// Default color
  35 #define VGA_TEXT_COLOR_DEFAULT VGA_TEXT_COLOR_GRAY_BLACK
  36 /// Tabsize
  37 #define VGA_TEXT_TABSIZE       8
  38
  39 typedef enum {
  40   VGA_TEXT_COLOR_GREEN_BLACK = 0x02,
  41   VGA_TEXT_COLOR_GRAY_BLACK = 0x07,
  42   VGA_TEXT_COLOR_RED_BLACK = 0x0C,
  43   VGA_TEXT_COLOR_WHITE_BLUE = 0x1F
  44 } vga_text_color_t;
  45
  46 typedef struct {
  47   /// X position on screen
  48   int x;
  49   /// Y position on screen
  50   int y;
  51   /// Color of next char
  52   vga_text_color_t color;
  53 } vga_text_cursor_t;
  54
  55 typedef struct {
  56   uint8_t chr;
  57   uint8_t attr;
  58 } vga_text_char_t;
  59
  60 vga_text_char_t *vga_text_video;
  61 vga_text_cursor_t vga_text_cursor;
  62
  63 void vga_init();
  64 void vga_text_clear();
  65 void vga_text_set_hwcursor(int x,int y);
  66 void vga_text_setcolor(vga_text_color_t color);
  67 void vga_text_printchar(char chr);
  68
  69 /// @todo remove
  70 void com_init();
  71 void com_send(char a);
  72 void bochs_send(char a);
  73
  74 #endif