/*
 * iffdrv.c - Create an Amiga IFF file.
 *
 * Written by
 *  Marco van den Heuvel <blackystardust68@yahoo.com>
 *
 * This file is part of VICE, the Versatile Commodore Emulator.
 * See README for copyright notice.
 *
 *  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.
 *
 */

#include "vice.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "archdep.h"
#include "iffdrv.h"
#include "lib.h"
#include "log.h"
#include "gfxoutput.h"
#include "palette.h"
#include "screenshot.h"
#include "types.h"
#include "util.h"


typedef struct gfxoutputdrv_data_s
{
  FILE *fd;
  char *ext_filename;
  BYTE *data;
  BYTE *iff_data;
  unsigned int line;
  int iff_rowbytes;
} gfxoutputdrv_data_t;

#if defined(__BEOS__) && defined(WORDS_BIGENDIAN)
extern gfxoutputdrv_t iff_drv;
#else
static gfxoutputdrv_t iff_drv;
#endif

static BYTE powers[8]= { 1,2,4,8,16,32,64,128 };

static int iffdrv_write_file_header(screenshot_t *screenshot)
{
  gfxoutputdrv_data_t *sdata;
  BYTE header[836];
  int i;
  int totalsize;

  memset(header, 0, sizeof(header));

  sdata = screenshot->gfxoutputdrv_data;

  sdata->iff_rowbytes=((screenshot->width+15)>>4)<<1;

  totalsize=828+(sdata->iff_rowbytes*screenshot->height*8);

  header[0]='F';
  header[1]='O';
  header[2]='R';
  header[3]='M';
  util_dword_to_be_buf(&header[4], totalsize);
  header[8]='I';
  header[9]='L';
  header[10]='B';
  header[11]='M';
  header[12]='B';
  header[13]='M';
  header[14]='H';
  header[15]='D';
  util_dword_to_be_buf(&header[16], 20);
  util_word_to_be_buf(&header[20],(WORD)(screenshot->width));
  util_word_to_be_buf(&header[22],(WORD)(screenshot->height));
  header[28]=8;
  util_word_to_be_buf(&header[36],(WORD)(screenshot->width));
  util_word_to_be_buf(&header[38],(WORD)(screenshot->height));
  header[40]='C';
  header[41]='M';
  header[42]='A';
  header[43]='P';
  util_dword_to_be_buf(&header[44],3*256);

  for (i = 0; i < 256; i++)
  {
    header[48+(i*3)]=screenshot->palette->entries[i].red;
    header[49+(i*3)]=screenshot->palette->entries[i].green;
    header[50+(i*3)]=screenshot->palette->entries[i].blue;
  }
  header[816]='C';
  header[817]='A';
  header[818]='M';
  header[819]='G';
  util_dword_to_be_buf(&header[820],4);
  header[828]='B';
  header[829]='O';
  header[830]='D';
  header[831]='Y';
  util_dword_to_be_buf(&header[832],sdata->iff_rowbytes*screenshot->height*8);

  if (fwrite(header,836,1,sdata->fd)<1)
    return -1;

  return 0;
}

static int iffdrv_open(screenshot_t *screenshot, const char *filename)
{
  gfxoutputdrv_data_t *sdata;

  if (screenshot->palette->num_entries > 256)
  {
    log_error(LOG_DEFAULT, "Max 256 colors supported.");
    return -1;
  }

  sdata = lib_malloc(sizeof(gfxoutputdrv_data_t));
  screenshot->gfxoutputdrv_data = sdata;
  sdata->line = 0;
  sdata->ext_filename=util_add_extension_const(filename, iff_drv.default_extension);
  sdata->fd = fopen(sdata->ext_filename, "wb");

  if (sdata->fd==NULL)
  {
    lib_free(sdata->ext_filename);
    lib_free(sdata);
    return -1;
  }

  if (iffdrv_write_file_header(screenshot)<0)
  {
    fclose(sdata->fd);
    lib_free(sdata->ext_filename);
    lib_free(sdata);
    return -1;
  }

  sdata->data = lib_malloc(sdata->iff_rowbytes*8);
  sdata->iff_data = lib_malloc(sdata->iff_rowbytes);

  return 0;
}

static void iff_c2p(BYTE *chunky, BYTE *planar, int amount, int plane)
{
  int i;

  for (i=0; i<amount; i++)
  {
    planar[i]=((chunky[i*8]&powers[plane])/powers[plane]*128)+
              ((chunky[(i*8)+1]&powers[plane])/powers[plane]*64)+
              ((chunky[(i*8)+2]&powers[plane])/powers[plane]*32)+
              ((chunky[(i*8)+3]&powers[plane])/powers[plane]*16)+
              ((chunky[(i*8)+4]&powers[plane])/powers[plane]*8)+
              ((chunky[(i*8)+5]&powers[plane])/powers[plane]*4)+
              ((chunky[(i*8)+6]&powers[plane])/powers[plane]*2)+
              (chunky[(i*8)+7]&powers[plane])/powers[plane];
  }
}

static int iffdrv_write(screenshot_t *screenshot)
{
  gfxoutputdrv_data_t *sdata;
  int j;

  sdata = screenshot->gfxoutputdrv_data;
  (screenshot->convert_line)(screenshot, sdata->data, sdata->line, SCREENSHOT_MODE_PALETTE);
  for (j = 0; j<8; j++)
  {
    iff_c2p(sdata->data,sdata->iff_data,sdata->iff_rowbytes,j);
    if (fwrite(sdata->iff_data, sdata->iff_rowbytes, 1, sdata->fd)<1)
      return -1;
  }
  return 0;
}

static int iffdrv_close(screenshot_t *screenshot)
{
  gfxoutputdrv_data_t *sdata;

  sdata = screenshot->gfxoutputdrv_data;

  fclose(sdata->fd);
  lib_free(sdata->data);
  lib_free(sdata->iff_data);
  lib_free(sdata->ext_filename);
  lib_free(sdata);

  return 0;
}

static int iffdrv_save(screenshot_t *screenshot, const char *filename)
{
  if (iffdrv_open(screenshot, filename) < 0)
    return -1;

  for (screenshot->gfxoutputdrv_data->line = 0; 
       screenshot->gfxoutputdrv_data->line < screenshot->height;
       (screenshot->gfxoutputdrv_data->line)++)
  {
    iffdrv_write(screenshot);
  }

  if (iffdrv_close(screenshot) < 0)
    return -1;

  return 0;
}

#ifdef FEATURE_CPUMEMHISTORY
static FILE *iffdrv_memmap_fd;
static char *iffdrv_memmap_ext_filename;
static BYTE *iffdrv_memmap_iff_data;
static int iffdrv_memmap_iff_rowbytes;

static int iffdrv_close_memmap(void)
{
  fclose(iffdrv_memmap_fd);
  lib_free(iffdrv_memmap_iff_data);
  lib_free(iffdrv_memmap_ext_filename);

  return 0;
}

static int iffdrv_write_memmap(int line, int x_size, BYTE *gfx)
{
  int j;

  for (j = 0; j<8; j++)
  {
    iff_c2p(gfx+(x_size*line), iffdrv_memmap_iff_data, iffdrv_memmap_iff_rowbytes, j);
    if (fwrite(iffdrv_memmap_iff_data, iffdrv_memmap_iff_rowbytes, 1, iffdrv_memmap_fd)<1)
      return -1;
  }
  return 0;
}

static int iffdrv_write_file_header_memmap(int x_size, int y_size, BYTE *palette)
{
  BYTE header[836];
  int i;
  int totalsize;

  memset(header, 0, sizeof(header));

  iffdrv_memmap_iff_rowbytes=((x_size+15)>>4)<<1;

  totalsize=828+(iffdrv_memmap_iff_rowbytes*y_size*8);

  header[0]='F';
  header[1]='O';
  header[2]='R';
  header[3]='M';
  util_dword_to_be_buf(&header[4], totalsize);
  header[8]='I';
  header[9]='L';
  header[10]='B';
  header[11]='M';
  header[12]='B';
  header[13]='M';
  header[14]='H';
  header[15]='D';
  util_dword_to_be_buf(&header[16], 20);
  util_word_to_be_buf(&header[20],(WORD)(x_size));
  util_word_to_be_buf(&header[22],(WORD)(y_size));
  header[28]=8;
  util_word_to_be_buf(&header[36],(WORD)(x_size));
  util_word_to_be_buf(&header[38],(WORD)(y_size));
  header[40]='C';
  header[41]='M';
  header[42]='A';
  header[43]='P';
  util_dword_to_be_buf(&header[44],3*256);

  for (i = 0; i < 256; i++)
  {
    header[48+(i*3)]=palette[i*3];
    header[49+(i*3)]=palette[(i*3)+1];
    header[50+(i*3)]=palette[(i*3)+2];
  }
  header[816]='C';
  header[817]='A';
  header[818]='M';
  header[819]='G';
  util_dword_to_be_buf(&header[820],4);
  header[828]='B';
  header[829]='O';
  header[830]='D';
  header[831]='Y';
  util_dword_to_be_buf(&header[832],iffdrv_memmap_iff_rowbytes*y_size*8);

  if (fwrite(header,836,1,iffdrv_memmap_fd)<1)
    return -1;

  return 0;
}

static int iffdrv_open_memmap(const char *filename, int x_size, int y_size, BYTE *palette)
{
  iffdrv_memmap_ext_filename=util_add_extension_const(filename, iff_drv.default_extension);
  iffdrv_memmap_fd = fopen(iffdrv_memmap_ext_filename, "wb");

  if (iffdrv_memmap_fd==NULL)
  {
    lib_free(iffdrv_memmap_ext_filename);
    return -1;
  }

  if (iffdrv_write_file_header_memmap(x_size, y_size, palette)<0)
  {
    fclose(iffdrv_memmap_fd);
    lib_free(iffdrv_memmap_ext_filename);
    return -1;
  }

  iffdrv_memmap_iff_data = lib_malloc(iffdrv_memmap_iff_rowbytes);

  return 0;
}

static int iffdrv_save_memmap(const char *filename, int x_size, int y_size, BYTE *gfx, BYTE *palette)
{
  int line;

  if (iffdrv_open_memmap(filename, x_size, y_size, palette) < 0)
    return -1;

  for (line = 0; line < y_size; line++)
  {
    iffdrv_write_memmap(line, x_size, gfx);
  }

  if (iffdrv_close_memmap() < 0)
    return -1;

  return 0;
}
#endif

static gfxoutputdrv_t iff_drv =
{
    "IFF",
    "IFF screenshot",
    "iff",
    NULL, /* formatlist */
    iffdrv_open,
    iffdrv_close,
    iffdrv_write,
    iffdrv_save,
    NULL,
    NULL,
    NULL,
    NULL
#ifdef FEATURE_CPUMEMHISTORY
    ,iffdrv_save_memmap
#endif
};

void gfxoutput_init_iff(void)
{
  gfxoutput_register(&iff_drv);
}
