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692 mauro 1 
/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Mauro Marinoni      <mauro.marinoni@unipv.it>
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 *   (see the web pages for full authors list)
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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://shark.sssup.it
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 */
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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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#include "kernel/kern.h"
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#include "string.h"
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#include "drivers/shark_fb26.h"
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#include "snapshot.h"
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struct SNAP_SLOT{
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        char used;
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        int  wx;
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        int  wy;
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        int  bytesperpixel;
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        void *buff;
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} sslot[16] = {{0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL},
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               {0, 0, 0, 0, NULL}};
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693 giacomo 63 
void *snapshot_getslot(int nbuff, int wx, int wy, int bytesperpixel)
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{
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        void* tmp;
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        if ((wx<=0) || (wy<=0) || (nbuff<0) || (nbuff>15)){
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                return NULL;
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        }
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        if (sslot[nbuff].used)
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                return NULL;
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        /* Allocate memory. */
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        tmp = (void *)kern_alloc(wx * wy * bytesperpixel);
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        if (!tmp) return NULL;
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        sslot[nbuff].used = 1;
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        sslot[nbuff].wx = wx;
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        sslot[nbuff].wy = wy;
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        sslot[nbuff].bytesperpixel = bytesperpixel;
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        sslot[nbuff].buff = tmp;
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        return tmp;
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}
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void snapshot_freeslot(int nbuff)
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{
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        if (sslot[nbuff].used == 0) return;
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        kern_free(sslot[nbuff].buff, sslot[nbuff].wx * sslot[nbuff].wy * sslot[nbuff].bytesperpixel);
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        sslot[nbuff].used = 0;
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}
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void snapshot_grab(int nbuff)
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{
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        extern void *video_memory;
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        memcpy(sslot[nbuff].buff,video_memory,sslot[nbuff].wx * sslot[nbuff].wy * sslot[nbuff].bytesperpixel);
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692 mauro 99 
}
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int snapshot_save_pgm(int nbuff, char *fname)
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{
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        char out_st[40];
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        register int i;
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        unsigned char tmp;
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        DOS_FILE *outf;
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        if ((outf = DOS_fopen(fname, "w")) == NULL) {
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                return -1;
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        } else {
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                sprintf(out_st, "P5\n%d %d\n%d\n", sslot[nbuff].wx, sslot[nbuff].wy, 255);
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                DOS_fwrite(out_st, strlen(out_st), 1, outf);
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                cprintf(out_st);
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                for (i = 0; i < sslot[nbuff].wy * sslot[nbuff].wx; i++) {
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                        tmp = (unsigned char)(*(int *)(sslot[nbuff].buff + i * 2));
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                        DOS_fwrite(&tmp, 1, 1, outf);
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                }
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                DOS_fclose(outf);
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        }
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        return 0;
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}
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int snapshot_save_ppm(int nbuff, char *fname)
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{
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        char out_st[40];
693 giacomo 127 
        register int i;
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        int col_r, col_g, col_b;
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        DOS_FILE *outf;
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        if ((outf = DOS_fopen(fname, "w")) == NULL) {
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                return -1;
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        } else {
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                sprintf(out_st, "P3\n%d %d\n%d\n", sslot[nbuff].wx, sslot[nbuff].wy, 255);
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                DOS_fwrite(out_st, strlen(out_st), 1, outf);
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                cprintf(out_st);
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                for (i = 0; i < sslot[nbuff].wx * sslot[nbuff].wy; i++) {
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                        col_r = ((*(int *)(sslot[nbuff].buff + i*2) & 0xF800) >> 11) << 3;
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                        col_g = ((*(int *)(sslot[nbuff].buff + i*2) & 0x07E0) >>  5) << 2;
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                        col_b =  (*(int *)(sslot[nbuff].buff + i*2) & 0x001F) << 3;
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                        sprintf(out_st, "%d %d %d  ", col_r, col_g, col_b);
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                        DOS_fwrite(out_st, strlen(out_st), 1, outf);
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                }
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                DOS_fclose(outf);
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        }
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        return 0;
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}