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/* ----------------------------------------------------------------------- *
*
* Copyright 2006-2008 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
#ifndef LIB_SYS_VESA_VIDEO_H
#define LIB_SYS_VESA_VIDEO_H
#include <colortbl.h>
#define FONT_MAX_CHARS 256
#define FONT_MAX_HEIGHT 32
#define FONT_WIDTH 8
#define VIDEO_X_SIZE 640
#define VIDEO_Y_SIZE 480
#define VIDEO_BORDER 8
#define TEXT_PIXEL_ROWS (VIDEO_Y_SIZE-2*VIDEO_BORDER)
#define TEXT_PIXEL_COLS (VIDEO_X_SIZE-2*VIDEO_BORDER)
typedef uint16_t attr_t;
struct vesa_char {
uint8_t ch; /* Character */
uint8_t _filler; /* Currently unused */
attr_t attr; /* Color table index */
};
/* Pixel formats in order of decreasing preference; PXF_NONE should be last */
/* BGR24 is preferred over BGRA32 since the I/O overhead is smaller. */
enum vesa_pixel_format {
PXF_BGR24, /* 24-bit BGR */
PXF_BGRA32, /* 32-bit BGRA */
PXF_LE_RGB16_565, /* 16-bit littleendian 5:6:5 RGB */
PXF_LE_RGB15_555, /* 15-bit littleendian 5:5:5 RGB */
PXF_NONE
};
extern enum vesa_pixel_format __vesacon_pixel_format;
extern unsigned int __vesacon_bytes_per_pixel;
typedef void * (*__vesacon_format_pixels_t)(void *, const uint32_t *, size_t);
extern __vesacon_format_pixels_t __vesacon_format_pixels;
extern const __vesacon_format_pixels_t __vesacon_format_pixels_list[PXF_NONE];
extern struct vesa_char *__vesacon_text_display;
extern int __vesacon_font_height, __vesacon_text_rows;
extern uint8_t __vesacon_graphics_font[FONT_MAX_CHARS][FONT_MAX_HEIGHT];
extern uint32_t __vesacon_background[VIDEO_Y_SIZE][VIDEO_X_SIZE];
extern uint32_t __vesacon_shadowfb[VIDEO_Y_SIZE][VIDEO_X_SIZE];
extern const uint16_t __vesacon_srgb_to_linear[256];
extern const uint8_t __vesacon_linear_to_srgb[4080];
int __vesacon_init_background(void);
int vesacon_load_background(const char *);
int __vesacon_init(void);
void __vesacon_init_cursor(int);
void __vesacon_erase(int, int, int, int, attr_t);
void __vesacon_scroll_up(int, attr_t);
void __vesacon_write_char(int, int, uint8_t, attr_t);
void __vesacon_redraw_text(void);
void __vesacon_doit(void);
void __vesacon_set_cursor(int, int, int);
void __vesacon_copy_to_screen(void *, const uint32_t *, size_t);
void __vesacon_init_copy_to_screen(void);
#endif /* LIB_SYS_VESA_VIDEO_H */
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