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#ifndef _EVAS_FB_H
#define _EVAS_FB_H 1
/* -------------------------------------------------------------------- */
/* LINUX FBCON FRAMEBUFFER UTILITY CODE */
/* makes setting up the framebuffer easy. Also makes it eays to port to */
/* some other system if needed. */
/* Copyright (c) 1999 - Carsten Haitzler (The Rasterman) */
/* -------------------------------------------------------------------- */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <linux/fb.h>
typedef struct _fb_mode FB_Mode;
struct _fb_mode
{
unsigned int width;
unsigned int height;
unsigned int refresh;
unsigned int depth;
unsigned int bpp;
int fb_fd;
void *mem;
unsigned int mem_offset;
struct fb_var_screeninfo fb_var;
};
/* init a framebuffer (and switch to) vt number vt. If vt == 0 use current */
/* vt */
void fb_init(int vt, int device);
/* call this afetr setting or getting the fb mode (whichever) to complete */
/* the dsetup */
int fb_postinit(FB_Mode *mode);
/* console switching - if a switch was requested this with block if block */
/* is 1, otherwise it will return 1 if current console is active or 0 if */
/* the user has switched away in the meantime */
int fb_await_switch(int block);
/* list all current possible video modes listed in /etc/fb.modes */
/* returns pointer to an aray of FB_Mode, and sets num_return to the number */
/* of elements in the returned array */
FB_Mode *fb_list_modes(unsigned int *num_return);
/* sets the fb mode to the resolution width x height and the depth to depth. */
/* and if refresh > 0 attempts to use a mode with a refresh rate (in Hz) of */
/* that. If this fails it will return NULL - if it succeeds it will return */
/* a pointer to the FB_Mode thatwas set. only modes in /etc/fb.modes will */
/* be used. If refresh is 0 it uses the DEFAULT mode (the one with no */
/* refresh rate at the end of its name (WIDTHxHEIGHT-REFRESH) */
/* NB: in 8bpp you get a 332 palette. This is fixed so all modes are */
/* "truecolor" - the only difference is how many bits bep red, green and */
/* blue channel. This is for speed reasons */
FB_Mode *fb_setmode(unsigned int width, unsigned int height, unsigned int depth, unsigned int refresh);
/* returns the current fb mode being used in FB_Mode */
FB_Mode *fb_getmode(void);
/* changes the bit depth of the current fb mode to depth and returns a new */
/* handle to a new fb mode with updated parameters. frees cur_mode for you. */
FB_Mode *fb_changedepth(FB_Mode *cur_mode, unsigned int depth);
/* changes resolution - retaining current depth of the current mode, */
/* returning a handle to the new mode once done. frees cur_mode for you. */
FB_Mode *fb_changeres(FB_Mode *cur_mode, unsigned int width, unsigned int height, unsigned int refresh);
/* chnages both resolution and depth and returns a handle to the new mode */
/* when done. frees cur_mode for you */
FB_Mode *fb_changemode(FB_Mode *cur_mode, unsigned int width, unsigned int height, unsigned int depth, unsigned int refresh);
/* ------------------------------------------------------------------------- */
/* How to init: */
/* (Example) */
/* FB_Mode *mode; */
/* int fb_fd = -1; */
/* fb_init(0); */
/* mode = fb_setmode(640, 480, 8, 0); */
/* if (mode) */
/* fb_fd = fb_postinit(mode); */
/* if (fb_fd == -1) */
/* { */
/* fprintf(stderr, "Frambuffer init failed\n"); */
/* exit(1); */
/* } */
/* .... code to play with the FB */
#endif
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