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/*

 * Project: HARTIK (HA-rd R-eal TI-me K-ernel)

 *

 * Coordinators: Giorgio Buttazzo <giorgio@sssup.it>

 *               Gerardo Lamastra <gerardo@sssup.it>

 *

 * Authors     : Luca Abeni <luca@hartik.sssup.it>

 *               Massimiliano Giorgi <massy@hartik.sssup.it>

 * (see authors.txt for full list of hartik's authors)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://hartik.sssup.it

 */

/*

 * Copyright (C) 1999 Luca Abeni and Massimiliano Giorgi

 *

 * This program 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 of the License, or

 * (at your option) any later version.

 *

 * This program 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  02111-1307  USA

 *

 */

/*

 * CVS :        $Id: gphoto.ok,v 1.1.1.1 2004-05-24 18:03:44 giacomo Exp $

 *

 * File:        $File$

 * Revision:    $Revision: 1.1.1.1 $

 * Last update: $Date: 2004-05-24 18:03:44 $

 */

#include "config.h"

#include <kernel/func.h>

#include <kernel/model.h>

#include <kernel/const.h>

#include <drivers/glib.h>

#include <unistd.h>

#include <stdlib.h>

#include <fcntl.h>

#include "mutex.h"

#include "gphoto.h"

#ifdef FULLCOLOR

/* 16bits format 5:6:5 */

/* 24bits format 8:8:8 */

static void down24to16(WORD *dst, BYTE *src, int dx, int dy)

{

  int x,y;

  /* row must be multiple of 4!!! (there are 3 bytes per pixel!)*/

  dst+=dx*(dy+1);

  for (y=0;y<dy;y++) {

    dst-=dx*2;

    for (x=0;x<dx;x++,src+=3,dst++)

      /* blue green red */

      *dst=((src[0]&0xf8)>>3)|((src[1]&0xfc)<<3)|((src[2]&0xf8)<<8);

  }

}

#define downscaleimage(x,y,z,k) down24to16((WORD*)x,y,z,k)

#else

static void down24to8(BYTE *dst, BYTE *src, int dx, int dy)

{

  int x,y;

  dst+=dx*(dy+1);

  for (y=0;y<dy;y++) {

    dst-=dx*2;

    for (x=0;x<dx;x++,src+=3,dst++)

      *dst=(((int)src[0])*11+((int)src[1])*59+((int)src[2])*30)/100;

  }

}

#define downscaleimage(x,y,z,k) down24to8(x,y,z,k)

#endif

/*

 *

 */

extern void draw_frame(int x, int y, int dx, int dy);

int gphoto_show(char *pathname, int x, int y)

{

  struct BITMAPFILEHEADER *bf;

  struct BITMAPINFOHEADER *bi;

  BYTE *src,*dst;

  long l;

  int h,n;

  int dx,dy;

  bf=(struct BITMAPFILEHEADER *)malloc(sizeof(struct BITMAPFILEHEADER));

  bi=(struct BITMAPINFOHEADER *)malloc(sizeof(struct BITMAPINFOHEADER));

  if (bf==NULL||bi==NULL) return -1;

  h=open(pathname,O_RDONLY);

  if (h==-1) {

    free(bf);

    free(bi);

    return -2;

  }

  n=read(h,bf,sizeof(struct BITMAPFILEHEADER));

  if (n!=sizeof(struct BITMAPFILEHEADER)) {

    close(h);

    free(bf);

    free(bi);

    return -4;

  }

  n=read(h,bi,sizeof(struct BITMAPINFOHEADER));

  if (n!=sizeof(struct BITMAPINFOHEADER)) {

    close(h);

    free(bf);

    free(bi);

    return -4;

  }

  //grx_close();

  /*

  cprintf("type: %c %c\n",bf->bfType&0xff,bf->bfType>>8);

  cprintf("size: %li\n",bf->bfSize);

  cprintf("tell: %li\n\n",bf->bfOffBits);

  cprintf("bitcoutn: %i\n",bi->biBitCount);

  cprintf("compress: %li\n",bi->biCompression);

  cprintf("dx: %li\n",bi->biWidth);

  cprintf("dy: %li\n",bi->biHeight);

  */

  //sys_end();

  //return 0;

  if (bf->bfType!='B'+256*'M'||

      bi->biBitCount!=24||

      bi->biCompression!=0||

      bi->biWidth%4!=0) {

    close(h);

    free(bf);

    free(bi);

    return -5;

  }

  dx=bi->biWidth;

  dy=bi->biHeight;

  src=(BYTE*)malloc(dx*dy*3);

  if (src==NULL) {

    close(h);

    free(bf);

    free(bi);

    return -6;

  }

  dst=(BYTE*)malloc(dx*dy*2);

  if (dst==NULL) {

    free(src);

    close(h);

    free(bf);

    free(bi);

    return -6;

  }

  l=lseek(h,bf->bfOffBits,SEEK_SET);

  if (l!=bf->bfOffBits) {

    free(dst);

    free(src);

    close(h);

    free(bf);

    free(bi);

    return -7;

  }

  n=read(h,src,dx*dy*3);

  if (n!=dx*dy*3) {

    free(dst);

    free(src);

    close(h);

    free(bf);

    free(bi);

    return -8;

  }

  downscaleimage(dst,src,dx,dy);

#ifndef NOGRX

  draw_frame(x,y,dx,dy);

  grxlock();

  grx_putimage(x, y, x+dx-1, y+dy-1, dst);

  grxunlock();

#endif

  free(dst);

  free(src);

  close(h);

  free(bi);

  free(bf);

  return 0;

}