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 #include <colortbl.h>
  32
  33 #define FONT_MAX_CHARS  256
  34 #define FONT_MAX_HEIGHT  32
  35 #define FONT_WIDTH        8
  36
  37 #define VIDEO_X_SIZE    640
  38 #define VIDEO_Y_SIZE    480
  39
  40 #define VIDEO_BORDER    8
  41 #define TEXT_PIXEL_ROWS (VIDEO_Y_SIZE-2*VIDEO_BORDER)
  42 #define TEXT_PIXEL_COLS (VIDEO_X_SIZE-2*VIDEO_BORDER)
  43
  44 struct vesa_char {
  45   uint8_t ch;                   /* Character */
  46   uint8_t attr;                 /* Color table index */
  47 };
  48
  49 /* Pixel formats in order of decreasing preference; PXF_NONE should be last */
  50 /* BGR24 is preferred over BGRA32 since the I/O overhead is smaller. */
  51 enum vesa_pixel_format {
  52   PXF_BGR24,                    /* 24-bit BGR */
  53   PXF_BGRA32,                   /* 32-bit BGRA */
  54   PXF_LE_RGB16_565,             /* 16-bit littleendian 5:6:5 RGB */
  55   PXF_NONE
  56 };
  57
  58 extern struct vesa_char *__vesacon_text_display;
  59
  60 extern int __vesacon_font_height, __vesacon_text_rows;
  61 extern enum vesa_pixel_format __vesacon_pixel_format;
  62 extern unsigned int __vesacon_bytes_per_pixel;
  63 extern uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
  64 extern uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
  65 extern uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE];
  66
  67 extern const uint16_t __vesacon_srgb_to_linear[256];
  68 extern const uint8_t  __vesacon_linear_to_srgb[4080];
  69
  70 int __vesacon_init_background(void);
  71 int vesacon_load_background(const char *);
  72 int __vesacon_init(void);
  73 void __vesacon_init_cursor(int);
  74 void __vesacon_erase(int, int, int, int, uint8_t);
  75 void __vesacon_scroll_up(int, uint8_t);
  76 void __vesacon_write_char(int, int, uint8_t, uint8_t);
  77 void __vesacon_redraw_text(void);
  78 void __vesacon_doit(void);
  79 void __vesacon_set_cursor(int, int, int);
  80
  81 #endif /* LIB_SYS_VESA_VIDEO_H */