com32/lib/sys/vesa/video.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2006-2008 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 <stdbool.h>
  32 #include <colortbl.h>
  33 #include "vesa.h"
  34
  35 #define FONT_MAX_CHARS  256
  36 #define FONT_MAX_HEIGHT  32
  37 #define FONT_WIDTH        8
  38
  39 #define DEFAULT_VESA_X_SIZE     640
  40 #define DEFAULT_VESA_Y_SIZE     480
  41
  42 #define VIDEO_BORDER    8
  43 #define TEXT_PIXEL_ROWS (__vesa_info.mi.v_res - 2*VIDEO_BORDER)
  44 #define TEXT_PIXEL_COLS (__vesa_info.mi.h_res - 2*VIDEO_BORDER)
  45
  46 typedef uint16_t attr_t;
  47
  48 struct vesa_char {
  49     uint8_t ch;                 /* Character */
  50     uint8_t _filler;            /* Currently unused */
  51     attr_t attr;                /* Color table index */
  52 };
  53
  54 /* Pixel formats in order of decreasing preference; PXF_NONE should be last */
  55 /* BGR24 is preferred over BGRA32 since the I/O overhead is smaller. */
  56 enum vesa_pixel_format {
  57     PXF_BGR24,                  /* 24-bit BGR */
  58     PXF_BGRA32,                 /* 32-bit BGRA */
  59     PXF_LE_RGB16_565,           /* 16-bit littleendian 5:6:5 RGB */
  60     PXF_LE_RGB15_555,           /* 15-bit littleendian 5:5:5 RGB */
  61     PXF_NONE
  62 };
  63 extern enum vesa_pixel_format __vesacon_pixel_format;
  64 extern unsigned int __vesacon_bytes_per_pixel;
  65 typedef const void *(*__vesacon_format_pixels_t)
  66     (void *, const uint32_t *, size_t);
  67 extern __vesacon_format_pixels_t __vesacon_format_pixels;
  68 extern const __vesacon_format_pixels_t __vesacon_format_pixels_list[PXF_NONE];
  69
  70 extern struct vesa_char *__vesacon_text_display;
  71
  72 extern int __vesacon_font_height;
  73 extern int __vesacon_text_rows;
  74 extern int __vesacon_text_cols;
  75 extern uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
  76 extern uint32_t *__vesacon_background;
  77 extern uint32_t *__vesacon_shadowfb;
  78
  79 extern const uint16_t __vesacon_srgb_to_linear[256];
  80 extern const uint8_t __vesacon_linear_to_srgb[4080];
  81
  82 int __vesacon_init_background(void);
  83 int vesacon_load_background(const char *);
  84 int __vesacon_init(int, int);
  85 void __vesacon_init_cursor(int);
  86 void __vesacon_erase(int, int, int, int, attr_t);
  87 void __vesacon_scroll_up(int, attr_t);
  88 void __vesacon_write_char(int, int, uint8_t, attr_t);
  89 void __vesacon_redraw_text(void);
  90 void __vesacon_doit(void);
  91 void __vesacon_set_cursor(int, int, bool);
  92 void __vesacon_copy_to_screen(size_t, const uint32_t *, size_t);
  93 void __vesacon_init_copy_to_screen(void);
  94
  95 int __vesacon_i915resolution(int x, int y);
  96
  97 #endif /* LIB_SYS_VESA_VIDEO_H */