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/*
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#ifndef _FB_H_
#define _FB_H_ 1
#include <stdint.h>
#include "bdf.h"
#include "display.h"
#include "vga-hw.h"
#define FB_VIDEO_MEM_MAX_W 1920
#define FB_VIDEO_MEM_MAX_H 1080
#define FB_VIDEO_MEM_MAX_BPP 32
#define FONT_PIXELS_W 8
#define FONT_PIXELS_H 16
extern struct display_ops fb_display_ops;
extern off_t fb_ptr;
extern int fb_type;
extern int fb_width;
extern int fb_height;
extern int fb_bpp;
extern int fb_wc;
extern int fb_hc;
error_t fb_get_multiboot_params (void);
error_t fb_display_start (void *handle);
error_t fb_display_fini (void *handle, int force);
struct multiboot_framebuffer_info {
uint64_t framebuffer_addr;
uint32_t framebuffer_pitch;
uint32_t framebuffer_width;
uint32_t framebuffer_height;
uint8_t framebuffer_bpp;
#define MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED 0
#define MULTIBOOT_FRAMEBUFFER_TYPE_RGB 1
#define MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT 2
uint8_t framebuffer_type;
union
{
struct
{
uint32_t framebuffer_palette_addr;
uint16_t framebuffer_palette_num_colors;
};
struct
{
uint8_t framebuffer_red_field_position;
uint8_t framebuffer_red_mask_size;
uint8_t framebuffer_green_field_position;
uint8_t framebuffer_green_mask_size;
uint8_t framebuffer_blue_field_position;
uint8_t framebuffer_blue_mask_size;
};
};
} __attribute__((packed));
/*
* Multiboot information structure as passed by the boot loader.
*/
struct multiboot_raw_info {
uint32_t flags;
uint32_t mem_lower;
uint32_t mem_upper;
uint32_t unused0;
uint32_t cmdline;
uint32_t mods_count;
uint32_t mods_addr;
uint32_t shdr_num;
uint32_t shdr_size;
uint32_t shdr_addr;
uint32_t shdr_strndx;
uint32_t mmap_length;
uint32_t mmap_addr;
uint32_t unused1[9];
struct multiboot_framebuffer_info fb_info;
} __attribute__((packed));
struct fbchr
{
wchar_t chr;
unsigned int used : 1;
unsigned int fgcol: 3;
unsigned int bgcol: 3;
};
typedef struct fb_mousecursor
{
float posx;
float posy;
int visible;
int enabled;
} fb_mousecursor_t;
struct fb_display
{
/* The font for this display. */
bdf_font_t font;
int width;
int height;
/* The state of the mouse cursor. */
fb_mousecursor_t mousecursor;
/* The position of the cursor (in characters) */
int cursor_pos_x;
int cursor_pos_y;
/* Remember for each cell on the display the glyph written to it and
the colours assigned. 0 means unassigned. */
struct fbchr refmatrix[FB_VIDEO_MEM_MAX_H / FONT_PIXELS_H][FB_VIDEO_MEM_MAX_W / FONT_PIXELS_W];
};
#endif
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