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1085 pj 1
/*
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 * Project: HARTIK (HA-rd R-eal TI-me K-ernel)
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 *
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 * Coordinators: Giorgio Buttazzo <giorgio@sssup.it>
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 *               Gerardo Lamastra <gerardo@sssup.it>
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 *
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 * Authors     : Luca Abeni <luca@hartik.sssup.it>
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 *               Massimiliano Giorgi <massy@hartik.sssup.it>
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 * (see authors.txt for full list of hartik's authors)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://hartik.sssup.it
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 */
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/*
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 * Copyright (C) 1999 Luca Abeni and Massimiliano Giorgi
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/*
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 * CVS :        $Id: gphoto.ok,v 1.1.1.1 2002-09-02 09:37:41 pj Exp $
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 *
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 * File:        $File$
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 * Revision:    $Revision: 1.1.1.1 $
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 * Last update: $Date: 2002-09-02 09:37:41 $
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 */
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#include "config.h"
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#include <kernel/func.h>
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#include <kernel/model.h>
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#include <kernel/const.h>
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#include <drivers/glib.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include "mutex.h"
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#include "gphoto.h"
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#ifdef FULLCOLOR
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/* 16bits format 5:6:5 */
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/* 24bits format 8:8:8 */
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static void down24to16(WORD *dst, BYTE *src, int dx, int dy)
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{
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  int x,y;
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  /* row must be multiple of 4!!! (there are 3 bytes per pixel!)*/
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  dst+=dx*(dy+1);
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  for (y=0;y<dy;y++) {
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    dst-=dx*2;
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    for (x=0;x<dx;x++,src+=3,dst++)
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      /* blue green red */
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      *dst=((src[0]&0xf8)>>3)|((src[1]&0xfc)<<3)|((src[2]&0xf8)<<8);
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  }
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}
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#define downscaleimage(x,y,z,k) down24to16((WORD*)x,y,z,k)
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#else
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static void down24to8(BYTE *dst, BYTE *src, int dx, int dy)
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{
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  int x,y;
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  dst+=dx*(dy+1);
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  for (y=0;y<dy;y++) {
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    dst-=dx*2;
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    for (x=0;x<dx;x++,src+=3,dst++)
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      *dst=(((int)src[0])*11+((int)src[1])*59+((int)src[2])*30)/100;
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  }
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}
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#define downscaleimage(x,y,z,k) down24to8(x,y,z,k)
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#endif
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/*
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 *
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 */
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extern void draw_frame(int x, int y, int dx, int dy);
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int gphoto_show(char *pathname, int x, int y)
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{
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  struct BITMAPFILEHEADER *bf;
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  struct BITMAPINFOHEADER *bi;
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  BYTE *src,*dst;
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  long l;
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  int h,n;
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  int dx,dy;
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  bf=(struct BITMAPFILEHEADER *)malloc(sizeof(struct BITMAPFILEHEADER));
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  bi=(struct BITMAPINFOHEADER *)malloc(sizeof(struct BITMAPINFOHEADER));
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  if (bf==NULL||bi==NULL) return -1;
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  h=open(pathname,O_RDONLY);
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  if (h==-1) {
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    free(bf);
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    free(bi);
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    return -2;
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  }
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  n=read(h,bf,sizeof(struct BITMAPFILEHEADER));
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  if (n!=sizeof(struct BITMAPFILEHEADER)) {
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    close(h);
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    free(bf);
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    free(bi);
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    return -4;
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  }
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  n=read(h,bi,sizeof(struct BITMAPINFOHEADER));
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  if (n!=sizeof(struct BITMAPINFOHEADER)) {
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    close(h);
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    free(bf);
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    free(bi);
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    return -4;
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  }
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  //grx_close();
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  /*
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  cprintf("type: %c %c\n",bf->bfType&0xff,bf->bfType>>8);
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  cprintf("size: %li\n",bf->bfSize);
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  cprintf("tell: %li\n\n",bf->bfOffBits);
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  cprintf("bitcoutn: %i\n",bi->biBitCount);
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  cprintf("compress: %li\n",bi->biCompression);
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  cprintf("dx: %li\n",bi->biWidth);
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  cprintf("dy: %li\n",bi->biHeight);
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  */
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  //sys_end();
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  //return 0;
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  if (bf->bfType!='B'+256*'M'||
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      bi->biBitCount!=24||
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      bi->biCompression!=0||
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      bi->biWidth%4!=0) {
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    close(h);
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    free(bf);
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    free(bi);
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    return -5;
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  }
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  dx=bi->biWidth;
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  dy=bi->biHeight;
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  src=(BYTE*)malloc(dx*dy*3);
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  if (src==NULL) {
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    close(h);
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    free(bf);
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    free(bi);
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    return -6;
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  }
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  dst=(BYTE*)malloc(dx*dy*2);
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  if (dst==NULL) {
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    free(src);
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    close(h);
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    free(bf);
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    free(bi);
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    return -6;
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  }
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  l=lseek(h,bf->bfOffBits,SEEK_SET);
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  if (l!=bf->bfOffBits) {
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    free(dst);
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    free(src);
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    close(h);
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    free(bf);
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    free(bi);
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    return -7;
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  }
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  n=read(h,src,dx*dy*3);
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  if (n!=dx*dy*3) {
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    free(dst);
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    free(src);
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    close(h);
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    free(bf);
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    free(bi);
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    return -8;
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  }
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206
  downscaleimage(dst,src,dx,dy);
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#ifndef NOGRX
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  draw_frame(x,y,dx,dy);
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  grxlock();
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  grx_putimage(x, y, x+dx-1, y+dy-1, dst);
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  grxunlock();
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#endif
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  free(dst);
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  free(src);
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  close(h);
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  free(bi);
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  free(bf);
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  return 0;
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}