/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

#ifndef _SDL_fbvideo_h

#define _SDL_fbvideo_h

#include <sys/types.h>

#include <termios.h>

#include <linux/fb.h>

#include "SDL_mouse.h"

#include "SDL_mutex.h"

#include "../SDL_sysvideo.h"

#if SDL_INPUT_TSLIB

#include "tslib.h"

#endif

/* Hidden "this" pointer for the video functions */

#define _THIS	SDL_VideoDevice *this

/* This is the structure we use to keep track of video memory */

typedef struct vidmem_bucket

{

    struct vidmem_bucket *prev;

    int used;

    int dirty;

    char *base;

    unsigned int size;

    struct vidmem_bucket *next;

} vidmem_bucket;

/* Private display data */

struct SDL_PrivateVideoData

{

    int console_fd;

    struct fb_var_screeninfo cache_vinfo;

    struct fb_var_screeninfo saved_vinfo;

    int saved_cmaplen;

    __u16 *saved_cmap;

    int current_vt;

    int saved_vt;

    int keyboard_fd;

    int saved_kbd_mode;

    struct termios saved_kbd_termios;

    int mouse_fd;

#if SDL_INPUT_TSLIB

    struct tsdev *ts_dev;

#endif

    char *mapped_mem;

    int mapped_memlen;

    int mapped_offset;

    char *mapped_io;

    long mapped_iolen;

    int flip_page;

    char *flip_address[2];

#define NUM_MODELISTS	4       /* 8, 16, 24, and 32 bits-per-pixel */

    int SDL_nummodes[NUM_MODELISTS];

    SDL_Rect **SDL_modelist[NUM_MODELISTS];

    vidmem_bucket surfaces;

    int surfaces_memtotal;

    int surfaces_memleft;

    SDL_mutex *hw_lock;

    int switched_away;

    struct fb_var_screeninfo screen_vinfo;

    Uint32 screen_arealen;

    Uint8 *screen_contents;

    __u16 screen_palette[3 * 256];

    void (*wait_vbl) (_THIS);

    void (*wait_idle) (_THIS);

};

/* Old variable names */

#define console_fd		(this->hidden->console_fd)

#define current_vt		(this->hidden->current_vt)

#define saved_vt		(this->hidden->saved_vt)

#define keyboard_fd		(this->hidden->keyboard_fd)

#define saved_kbd_mode		(this->hidden->saved_kbd_mode)

#define saved_kbd_termios	(this->hidden->saved_kbd_termios)

#define mouse_fd		(this->hidden->mouse_fd)

#if SDL_INPUT_TSLIB

#define ts_dev			(this->hidden->ts_dev)

#endif

#define cache_vinfo		(this->hidden->cache_vinfo)

#define saved_vinfo		(this->hidden->saved_vinfo)

#define saved_cmaplen		(this->hidden->saved_cmaplen)

#define saved_cmap		(this->hidden->saved_cmap)

#define mapped_mem		(this->hidden->mapped_mem)

#define mapped_memlen		(this->hidden->mapped_memlen)

#define mapped_offset		(this->hidden->mapped_offset)

#define mapped_io		(this->hidden->mapped_io)

#define mapped_iolen		(this->hidden->mapped_iolen)

#define flip_page		(this->hidden->flip_page)

#define flip_address		(this->hidden->flip_address)

#define SDL_nummodes		(this->hidden->SDL_nummodes)

#define SDL_modelist		(this->hidden->SDL_modelist)

#define surfaces		(this->hidden->surfaces)

#define surfaces_memtotal	(this->hidden->surfaces_memtotal)

#define surfaces_memleft	(this->hidden->surfaces_memleft)

#define hw_lock			(this->hidden->hw_lock)

#define switched_away		(this->hidden->switched_away)

#define screen_vinfo		(this->hidden->screen_vinfo)

#define screen_arealen		(this->hidden->screen_arealen)

#define screen_contents		(this->hidden->screen_contents)

#define screen_palette		(this->hidden->screen_palette)

#define wait_vbl		(this->hidden->wait_vbl)

#define wait_idle		(this->hidden->wait_idle)

/* Accelerator types that are supported by the driver, but are not

   necessarily in the kernel headers on the system we compile on.

*/

#ifndef FB_ACCEL_MATROX_MGAG400

#define FB_ACCEL_MATROX_MGAG400	26      /* Matrox G400                  */

#endif

#ifndef FB_ACCEL_3DFX_BANSHEE

#define FB_ACCEL_3DFX_BANSHEE	31      /* 3Dfx Banshee                 */

#endif

/* These functions are defined in SDL_fbvideo.c */

extern void FB_SavePaletteTo(_THIS, int palette_len, __u16 * area);

extern void FB_RestorePaletteFrom(_THIS, int palette_len, __u16 * area);

/* These are utility functions for working with video surfaces */

static __inline__ void

FB_AddBusySurface(SDL_Surface * surface)

{

    ((vidmem_bucket *) surface->hwdata)->dirty = 1;

}

static __inline__ int

FB_IsSurfaceBusy(SDL_Surface * surface)

{

    return ((vidmem_bucket *) surface->hwdata)->dirty;

}

static __inline__ void

FB_WaitBusySurfaces(_THIS)

{

    vidmem_bucket *bucket;

    /* Wait for graphic operations to complete */

    wait_idle(this);

    /* Clear all surface dirty bits */

    for (bucket = &surfaces; bucket; bucket = bucket->next) {

        bucket->dirty = 0;

    }

}

static __inline__ void

FB_dst_to_xy(_THIS, SDL_Surface * dst, int *x, int *y)

{

    *x = (long) ((char *) dst->pixels - mapped_mem) % this->screen->pitch;

    *y = (long) ((char *) dst->pixels - mapped_mem) / this->screen->pitch;

    if (dst == this->screen) {

        *x += this->offset_x;

        *y += this->offset_y;

    }

}

#endif /* _SDL_fbvideo_h */

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