com32/lib/sys/vesa/video.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2006 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * ----------------------------------------------------------------------- */
  27
  28 #ifndef LIB_SYS_VESA_VIDEO_H
  29 #define LIB_SYS_VESA_VIDEO_H
  30
  31 #define FONT_MAX_CHARS  256
  32 #define FONT_MAX_HEIGHT  32
  33 #define FONT_WIDTH        8
  34
  35 #define VIDEO_X_SIZE    640
  36 #define VIDEO_Y_SIZE    480
  37
  38 #define VIDEO_BORDER    8
  39 #define TEXT_PIXEL_ROWS (VIDEO_Y_SIZE-2*VIDEO_BORDER)
  40 #define TEXT_PIXEL_COLS (VIDEO_X_SIZE-2*VIDEO_BORDER)
  41
  42 #define SHADOW_NONE     0
  43 #define SHADOW_ALL      1
  44 #define SHADOW_NORMAL   2
  45 #define SHADOW_REVERSE  3
  46
  47 struct vesa_char {
  48   uint8_t ch;                   /* Character */
  49   uint8_t attr;                 /* PC-style graphics attribute */
  50   uint8_t sha;                  /* Shadow attributes */
  51   uint8_t pad;                  /* Currently unused */
  52 };
  53
  54 extern struct vesa_char *__vesacon_text_display;
  55
  56 extern int __vesacon_font_height, __vesacon_text_rows;
  57 extern uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
  58 extern uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
  59 extern uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE];
  60
  61 extern unsigned char __vesacon_alpha_tbl[256][4];
  62
  63 int __vesacon_init_background(void);
  64 int vesacon_load_background(const char *);
  65 int __vesacon_init(void);
  66 void __vesacon_erase(int, int, int, int, uint8_t, int);
  67 void __vesacon_scroll_up(int, uint8_t, int);
  68 void __vesacon_write_at(int, int, const char *, uint8_t, int);
  69 void __vesacon_write_char(int, int, char, uint8_t, int);
  70
  71 #endif /* LIB_SYS_VESA_VIDEO_H */