/* vim:expandtab:ts=2 sw=2:
*/
/*  Grafx2 - The Ultimate 256-color bitmap paint program

    Copyright 2011 Pawel Góralski
    Copyright 2009 Pasi Kallinen
    Copyright 2008 Peter Gordon
    Copyright 2008 Franck Charlet
    Copyright 2007 Adrien Destugues
    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)

    Grafx2 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; version 2
    of the License.

    Grafx2 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 Grafx2; if not, see <http://www.gnu.org/licenses/>
*/
#define GLOBAL_VARIABLES

// time.h defines timeval which conflicts with the one in amiga SDK
#ifdef __amigaos__
  #include <devices/timer.h>
#else
  #include <time.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#ifndef _MSC_VER
#include <unistd.h>
#else
#if _MSC_VER < 1900
#define snprintf _snprintf
#endif
#endif
#if defined(USE_SDL) || defined(USE_SDL2)
#include <SDL.h>
#include <SDL_image.h>
#endif

#if defined(WIN32)
    #include <windows.h>
    #include <shlwapi.h>
#elif defined (__MINT__)
    #include <mint/osbind.h>
#elif defined(__macosx__)
    #import <CoreFoundation/CoreFoundation.h>
    #import <sys/param.h>
#elif defined(__FreeBSD__)
    #include <sys/param.h>
#endif

#include "const.h"
#include "struct.h"
#include "global.h"
#include "graph.h"
#include "misc.h"
#include "init.h"
#include "buttons.h"
#include "engine.h"
#include "pages.h"
#include "loadsave.h"
#include "screen.h"
#include "errors.h"
#include "readini.h"
#include "saveini.h"
#include "io.h"
#include "text.h"
#include "setup.h"
#include "windows.h"
#include "brush.h"
#include "palette.h"
#include "realpath.h"
#include "input.h"
#include "help.h"
#include "filesel.h"
#if defined(WIN32) && !(defined(USE_SDL) || defined(USE_SDL2))
#include "win32screen.h"
#endif


#if defined (WIN32) && (defined(USE_SDL) || defined(USE_SDL2))
  // On Windows, SDL_putenv is not present in any compilable header.
  // It can be linked anyway, this declaration only avoids
  // a compilation warning.
  extern DECLSPEC int SDLCALL SDL_putenv(const char *variable);
#endif

extern char Program_version[]; // generated in pversion.c

static int setsize_width;
static int setsize_height;

#if defined(USE_SDL) || defined(USE_SDL2)
/// Pointer to the current joystick controller.
static SDL_Joystick* Joystick;
#endif

//--- Affichage de la syntaxe, et de la liste des modes vidéos disponibles ---
void Display_syntax(void)
{
  int mode_index, i;
  char modes[1024*2];
  const char * syntax =
    "Syntax: grafx2 [<arguments>] [<picture1>] [<picture2>]\n\n"
    "<arguments> can be:\n"
    "\t-? -h -H -help     for this help screen\n"
    "\t-wide              to emulate a video mode with wide pixels (2x1)\n"
    "\t-tall              to emulate a video mode with tall pixels (1x2)\n"
    "\t-double            to emulate a video mode with double pixels (2x2)\n"
    "\t-wide2             to emulate a video mode with double wide pixels (4x2)\n"
    "\t-tall2             to emulate a video mode with double tall pixels (2x4)\n"
    "\t-triple            to emulate a video mode with triple pixels (3x3)\n"
    "\t-quadruple         to emulate a video mode with quadruple pixels (4x4)\n"
    "\t-rgb n             to reduce RGB precision (2 to 256, 256=max precision)\n"
    "\t-gamma n           to adjust Gamma correction (1 to 30, 10=no correction)\n"
    "\t-skin <filename>   to use an alternate file with the menu graphics\n"
    "\t-mode <videomode>  to set a video mode\n"
    "\t-size <resolution> to set the image size\n"
    "Arguments can be prefixed either by / - or --\n"
    "They can also be abbreviated.\n\n";
  fputs(syntax, stdout);

  i = snprintf(modes, sizeof(modes), "Available video modes:\n\n");
  for (mode_index = 0; mode_index < Nb_video_modes; mode_index += 12)
  {
    int k;
    for (k = 0; k < 6; k++)
    {
      if (mode_index + k >= Nb_video_modes) break;
      i += snprintf(modes + i, sizeof(modes) - i, "%12s", Mode_label(mode_index + k));
    }
    i += snprintf(modes + i, sizeof(modes) - i, "\n");
  }
  fputs(modes, stdout);

#if defined(WIN32)
  MessageBoxA(NULL, syntax, "GrafX2", MB_OK);
  MessageBoxA(NULL, modes, "GrafX2", MB_OK);
#endif
}

// ---------------------------- Sortie impromptue ----------------------------
void Warning_function(const char *message, const char *filename, int line_number, const char *function_name)
{
  printf("Warning in file %s, line %d, function %s : %s\n", filename, line_number, function_name, message);
#if defined(_MSC_VER) && defined(DEBUG)
  OutputDebugStringA(message);
  OutputDebugStringA("\n");
#endif
}


// ---------------------------- Sortie impromptue ----------------------------
void Error_function(int error_code, const char *filename, int line_number, const char *function_name)
{
  T_Palette temp_palette;
  T_Palette backup_palette;
  int       index;
  printf("Error number %d occured in file %s, line %d, function %s.\n", error_code, filename,line_number,function_name);

  if (error_code==0)
  {
    // L'erreur 0 n'est pas une vraie erreur, elle fait seulement un flash rouge de l'écran pour dire qu'il y a un problème.
    // Toutes les autres erreurs déclenchent toujours une sortie en catastrophe du programme !
    memcpy(backup_palette, Get_current_palette(), sizeof(T_Palette));
    memcpy(temp_palette, backup_palette, sizeof(T_Palette));
    for (index=0;index<=255;index++)
      temp_palette[index].R=255;
    Set_palette(temp_palette);
    Delay_with_active_mouse(50); // Half a second of red flash
    Set_palette(backup_palette);
  }
  else
  {
    switch (error_code)
    {
      case ERROR_GUI_MISSING         : printf("Error: File containing the GUI graphics is missing!\n");
                                       printf("This program cannot run without this file.\n");
                                       break;
      case ERROR_GUI_CORRUPTED       : printf("Error: File containing the GUI graphics couldn't be parsed!\n");
                                       printf("This program cannot run without a correct version of this file.\n");
                                       break;
      case ERROR_INI_MISSING         : printf("Error: File gfx2def.ini is missing!\n");
                                       printf("This program cannot run without this file.\n");
                                       break;
      case ERROR_MEMORY              : printf("Error: Not enough memory!\n\n");
                                       printf("You should try exiting other programs to free some bytes for Grafx2.\n\n");
                                       break;
      case ERROR_FORBIDDEN_MODE      : printf("Error: The requested video mode has been disabled from the resolution menu!\n");
                                       printf("If you want to run the program in this mode, you'll have to start it with an\n");
                                       printf("enabled mode, then enter the resolution menu and enable the mode you want.\n");
                                       printf("Check also if the 'Default_video_mode' parameter in gfx2.ini is correct.\n");
                                       break;
      case ERROR_FORBIDDEN_SIZE      : printf("Error: The image dimensions all have to be in the range 1-9999!\n");
                                       break;
      case ERROR_COMMAND_LINE     : printf("Error: Invalid parameter or file not found.\n\n");
                                       Display_syntax();
                                       break;
      case ERROR_SAVING_CFG     : printf("Error: Write error while saving settings!\n");
                                       printf("Settings have not been saved correctly, and the gfx2.cfg file may have been\n");
                                       printf("corrupt. If so, please delete it and Grafx2 will restore default settings.\n");
                                       break;
      case ERROR_MISSING_DIRECTORY : printf("Error: Directory you ran the program from not found!\n");
                                       break;
      case ERROR_INI_CORRUPTED       : printf("Error: File gfx2.ini is corrupt!\n");
                                       printf("It contains bad values at line %d.\n",Line_number_in_INI_file);
                                       printf("You can re-generate it by deleting the file and running GrafX2 again.\n");
                                       break;
      case ERROR_SAVING_INI     : printf("Error: Cannot rewrite file gfx2.ini!\n");
                                       break;
      case ERROR_SORRY_SORRY_SORRY  : printf("Error: Sorry! Sorry! Sorry! Please forgive me!\n");
                                       break;
    }

#if defined(USE_SDL) || defined(USE_SDL2)
    SDL_Quit();
#endif
    exit(error_code);
  }
}

enum CMD_PARAMS
{
    CMDPARAM_HELP,
    CMDPARAM_MODE,
    CMDPARAM_PIXELRATIO_TALL,
    CMDPARAM_PIXELRATIO_WIDE,
    CMDPARAM_PIXELRATIO_DOUBLE,
    CMDPARAM_PIXELRATIO_TRIPLE,
    CMDPARAM_PIXELRATIO_QUAD,
    CMDPARAM_PIXELRATIO_TALL2,
    CMDPARAM_PIXELRATIO_TALL3,
    CMDPARAM_PIXELRATIO_WIDE2,
    CMDPARAM_RGB,
    CMDPARAM_GAMMA,
    CMDPARAM_SKIN,
    CMDPARAM_SIZE
};

struct {
    const char *param;
    int id;
} cmdparams[] = {
    {"?", CMDPARAM_HELP},
    {"h", CMDPARAM_HELP},
    {"H", CMDPARAM_HELP},
    {"help", CMDPARAM_HELP},
    {"mode", CMDPARAM_MODE},
    {"tall", CMDPARAM_PIXELRATIO_TALL},
    {"wide", CMDPARAM_PIXELRATIO_WIDE},
    {"double", CMDPARAM_PIXELRATIO_DOUBLE},
    {"triple", CMDPARAM_PIXELRATIO_TRIPLE},
    {"quadruple", CMDPARAM_PIXELRATIO_QUAD},
    {"tall2", CMDPARAM_PIXELRATIO_TALL2},
    {"tall3", CMDPARAM_PIXELRATIO_TALL3},
    {"wide2", CMDPARAM_PIXELRATIO_WIDE2},
    {"rgb", CMDPARAM_RGB},
    {"gamma", CMDPARAM_GAMMA},
    {"skin", CMDPARAM_SKIN},
    {"size", CMDPARAM_SIZE},
};

#define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))

// --------------------- Analyse de la ligne de commande ---------------------
int Analyze_command_line(int argc, char * argv[], char *main_filename, char *main_directory, char *spare_filename, char *spare_directory)
{
  char *buffer ;
  int index;
  int file_in_command_line;

  file_in_command_line = 0;
  Resolution_in_command_line = 0;

  Current_resolution = Config.Default_resolution;

  for (index = 1; index<argc; index++)
  {
    char *s = argv[index];
    int is_switch = ((strchr(s,'/') == s) || (strchr(s,'-') == s) || (strstr(s,"--") == s));
    int tmpi;
    char *tmpcp;
    int paramtype = -1;
    if (is_switch)
    {
      int param_matches = 0;
      int param_match = -1;
      if (*s == '-')
      {
        s++;
        if (*s == '-')
          s++;
      }
      else
        s++;

      for (tmpi = 0; tmpi < ARRAY_SIZE(cmdparams); tmpi++)
      {
        if (!strcmp(s, cmdparams[tmpi].param))
        {
          paramtype = cmdparams[tmpi].id;
          break;
        }
        else if (strstr(cmdparams[tmpi].param, s))
        {
          param_matches++;
          param_match = cmdparams[tmpi].id;
        }
      }
      if (paramtype == -1 && param_matches == 1)
        paramtype = param_match;

    }
    switch (paramtype)
    {
      case CMDPARAM_HELP:
        Display_syntax();
        exit(0);
      case CMDPARAM_MODE:
        index++;
        if (index<argc)
        {
          Resolution_in_command_line = 1;
          Current_resolution = Convert_videomode_arg(argv[index]);
          if (Current_resolution == -1)
          {
            Error(ERROR_COMMAND_LINE);
            Display_syntax();
            exit(0);
          }
          if ((Video_mode[Current_resolution].State & 0x7F) == 3)
          {
            Error(ERROR_FORBIDDEN_MODE);
            exit(0);
          }
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
      case CMDPARAM_PIXELRATIO_TALL:
        Pixel_ratio = PIXEL_TALL;
        break;
      case CMDPARAM_PIXELRATIO_WIDE:
        Pixel_ratio = PIXEL_WIDE;
        break;
      case CMDPARAM_PIXELRATIO_DOUBLE:
        Pixel_ratio = PIXEL_DOUBLE;
        break;
      case CMDPARAM_PIXELRATIO_TRIPLE:
        Pixel_ratio = PIXEL_TRIPLE;
        break;
      case CMDPARAM_PIXELRATIO_QUAD:
        Pixel_ratio = PIXEL_QUAD;
        break;
      case CMDPARAM_PIXELRATIO_TALL2:
        Pixel_ratio = PIXEL_TALL2;
        break;
      case CMDPARAM_PIXELRATIO_TALL3:
        Pixel_ratio = PIXEL_TALL3;
        break;
      case CMDPARAM_PIXELRATIO_WIDE2:
        Pixel_ratio = PIXEL_WIDE2;
        break;
      case CMDPARAM_RGB:
        /* RGB scale */
        index++;
        if (index<argc)
        {
          int scale;
          scale = atoi(argv[index]);
          if (scale < 2 || scale > 256)
          {
            Error(ERROR_COMMAND_LINE);
            Display_syntax();
            exit(0);
          }
          Set_palette_RGB_scale(scale);
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
      case CMDPARAM_GAMMA:
        /* Gamma correction */
        index++;
        if (index<argc)
        {
          int scale;
          scale = atoi(argv[index]);
          if (scale < 1 || scale > 30)
          {
            Error(ERROR_COMMAND_LINE);
            Display_syntax();
            exit(0);
          }
          Set_palette_Gamma(scale);
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
      case CMDPARAM_SKIN:
        // GUI skin file
        index++;
        if (index<argc)
        {
          strcpy(Config.Skin_file,argv[index]);
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
      case CMDPARAM_SIZE:
        index++;
        if (index<argc)
        {
          setsize_width = atoi(argv[index]);
          tmpcp = strchr(argv[index], 'x');
          if (tmpcp == NULL)
            tmpcp = strchr(argv[index], 'X');
          if (tmpcp == NULL)
          {
            Error(ERROR_COMMAND_LINE);
            Display_syntax();
            exit(0);
          }
          setsize_height = atoi(++tmpcp);
          if (setsize_height < 1 || setsize_height > 9999 ||
              setsize_width < 1 || setsize_width > 9999)
          {
            Error(ERROR_FORBIDDEN_SIZE);
            Display_syntax();
            exit(0);
          }
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
      default:
        // Si ce n'est pas un paramètre, c'est le nom du fichier à ouvrir
        if (file_in_command_line > 1)
        {
          // Il y a déjà 2 noms de fichiers et on vient d'en trouver un 3ème
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        else if (File_exists(argv[index]))
        {
          file_in_command_line ++;
          buffer = Realpath(argv[index], NULL);

          if (file_in_command_line == 1)
          {
            // Separate path from filename
            Extract_path(main_directory, buffer);
            Extract_filename(main_filename, buffer);
          }
          else
          {
            // Separate path from filename
            Extract_path(spare_directory, buffer);
            Extract_filename(spare_filename, buffer);
          }
          free(buffer);
          buffer = NULL;
        }
        else
        {
          Error(ERROR_COMMAND_LINE);
          Display_syntax();
          exit(0);
        }
        break;
    }
  }
  return file_in_command_line;
}

// Compile-time assertions:
#define CT_ASSERT(e) extern char (*ct_assert(void)) [sizeof(char[1 - 2*!(e)])]

// This line will raise an error at compile time
// when sizeof(T_Components) is not 3.
CT_ASSERT(sizeof(T_Components)==3);

// This line will raise an error at compile time
// when sizeof(T_Palette) is not 768.
CT_ASSERT(sizeof(T_Palette)==768);

// ------------------------ Initialiser le programme -------------------------
// Returns 0 on fail
int Init_program(int argc,char * argv[])
{
  int temp;
  int starting_videomode;
  enum IMAGE_MODES starting_image_mode;
  static char program_directory[MAX_PATH_CHARACTERS];
  T_Gui_skin *gfx;
  int file_in_command_line;
  T_Gradient_array initial_gradients;
  static char main_filename [MAX_PATH_CHARACTERS];
#ifdef ENABLE_FILENAMES_ICONV
  static word main_filename_unicode[MAX_PATH_CHARACTERS];
#endif
  static char main_directory[MAX_PATH_CHARACTERS];
  static char spare_filename [MAX_PATH_CHARACTERS];
  static char spare_directory[MAX_PATH_CHARACTERS];

  #if defined(__MINT__)
  printf("===============================\n");
  printf(" /|\\ GrafX2 %.19s\n", Program_version);
  printf(" compilation date: %.16s\n", __DATE__);
  printf("===============================\n");
  #endif

#ifdef ENABLE_FILENAMES_ICONV
  // iconv is used to convert filenames
  cd = iconv_open(TOCODE, FROMCODE);  // From UTF8 to ANSI
  cd_inv = iconv_open(FROMCODE, TOCODE);  // From ANSI to UTF8
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
  cd_utf16 = iconv_open("UTF-16BE", FROMCODE); // From UTF8 to UTF16
  cd_utf16_inv = iconv_open(FROMCODE, "UTF-16BE"); // From UTF16 to UTF8
#else
  cd_utf16 = iconv_open("UTF-16LE", FROMCODE); // From UTF8 to UTF16
  cd_utf16_inv = iconv_open(FROMCODE, "UTF-16LE"); // From UTF16 to UTF8
#endif
#endif /* ENABLE_FILENAMES_ICONV */

  // On crée dès maintenant les descripteurs des listes de pages pour la page
  // principale et la page de brouillon afin que leurs champs ne soient pas
  // invalide lors des appels aux multiples fonctions manipulées à
  // l'initialisation du programme.
  Main.backups=(T_List_of_pages *)malloc(sizeof(T_List_of_pages));
  Spare.backups=(T_List_of_pages *)malloc(sizeof(T_List_of_pages));
  Init_list_of_pages(Main.backups);
  Init_list_of_pages(Spare.backups);

  // Determine the executable directory
  Set_program_directory(argv[0],program_directory);
  // Choose directory for data (read only)
  Set_data_directory(program_directory,Data_directory);
  // Choose directory for settings (read/write)
  Set_config_directory(program_directory,Config_directory);
// On détermine le répertoire courant:
  Get_current_directory(Main.selector.Directory,Main.selector.Directory_unicode,MAX_PATH_CHARACTERS);

  // On en profite pour le mémoriser dans le répertoire principal:
  strcpy(Initial_directory,Main.selector.Directory);

  // On initialise les données sur le nom de fichier de l'image de brouillon:
  strcpy(Spare.selector.Directory,Main.selector.Directory);

  Main.fileformat=DEFAULT_FILEFORMAT;
  Spare.fileformat    =DEFAULT_FILEFORMAT;

  strcpy(Brush_selector.Directory,Main.selector.Directory);
  strcpy(Brush_file_directory,Main.selector.Directory);
  strcpy(Brush_filename       ,"NO_NAME.GIF");
  Brush_fileformat    =DEFAULT_FILEFORMAT;

  strcpy(Palette_selector.Directory,Main.selector.Directory);

  // On initialise ce qu'il faut pour que les fileselects ne plantent pas:

  Main.selector.Position=0; // Au début, le fileselect est en haut de la liste des fichiers
  Main.selector.Offset=0; // Au début, le fileselect est en haut de la liste des fichiers
  Main.selector.Format_filter=FORMAT_ALL_IMAGES;

  Main.current_layer=0;
  Main.layers_visible=0xFFFFFFFF;
  Main.layers_visible_backup=0xFFFFFFFF;
  Spare.current_layer=0;
  Spare.layers_visible=0xFFFFFFFF;
  Spare.layers_visible_backup=0xFFFFFFFF;

  Spare.selector.Position=0;
  Spare.selector.Offset=0;
  Spare.selector.Format_filter=FORMAT_ALL_IMAGES;
  Brush_selector.Position=0;
  Brush_selector.Offset=0;
  Brush_selector.Format_filter=FORMAT_ALL_IMAGES;

  Palette_selector.Position=0;
  Palette_selector.Offset=0;
  Palette_selector.Format_filter=FORMAT_ALL_PALETTES;

  // On initialise d'ot' trucs
  Main.offset_X=0;
  Main.offset_Y=0;
  Main.separator_position=0;
  Main.X_zoom=0;
  Main.separator_proportion=INITIAL_SEPARATOR_PROPORTION;
  Main.magnifier_mode=0;
  Main.magnifier_factor=DEFAULT_ZOOM_FACTOR;
  Main.magnifier_height=0;
  Main.magnifier_width=0;
  Main.magnifier_offset_X=0;
  Main.magnifier_offset_Y=0;
  Spare.offset_X=0;
  Spare.offset_Y=0;
  Spare.separator_position=0;
  Spare.X_zoom=0;
  Spare.separator_proportion=INITIAL_SEPARATOR_PROPORTION;
  Spare.magnifier_mode=0;
  Spare.magnifier_factor=DEFAULT_ZOOM_FACTOR;
  Spare.magnifier_height=0;
  Spare.magnifier_width=0;
  Spare.magnifier_offset_X=0;
  Spare.magnifier_offset_Y=0;
  Keyboard_click_allowed = 1;

  Main.safety_backup_prefix = SAFETYBACKUP_PREFIX_A[0];
  Spare.safety_backup_prefix = SAFETYBACKUP_PREFIX_B[0];
  Main.time_of_safety_backup = 0;
  Spare.time_of_safety_backup = 0;


#if defined(USE_SDL) || defined(USE_SDL2)
  // SDL
  if(SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0)
  {
    // The program can't continue without that anyway
    printf("Couldn't initialize SDL.\n");
    return(0);
  }

  Joystick = SDL_JoystickOpen(0);
#endif
#if defined(USE_SDL)
  SDL_EnableKeyRepeat(250, 32);
  SDL_EnableUNICODE(SDL_ENABLE);
  SDL_WM_SetCaption("GrafX2","GrafX2");
#endif
  Define_icon();

  // Texte
  Init_text();

  // On initialise tous les modes vidéo
  Set_all_video_modes();
  Pixel_ratio=PIXEL_SIMPLE;
  // On initialise les données sur l'état du programme:
  // Donnée sur la sortie du programme:
  Quit_is_required=0;
  Quitting=0;
  // Données sur l'état du menu:
  Menu_is_visible=1;
  // Données sur les couleurs et la palette:
  First_color_in_palette=0;
  // Données sur le curseur:
  Cursor_shape=CURSOR_SHAPE_TARGET;
  Cursor_hidden=0;
  // Données sur le pinceau:
  Paintbrush_X=0;
  Paintbrush_Y=0;
  Paintbrush_hidden=0;

  // On initialise tout ce qui concerne les opérations et les effets
  Operation_stack_size=0;
  Selected_freehand_mode=OPERATION_CONTINUOUS_DRAW;
  Selected_line_mode         =OPERATION_LINE;
  Selected_curve_mode        =OPERATION_3_POINTS_CURVE;
  Effect_function=No_effect;
    // On initialise les infos de la loupe:
  Main.magnifier_mode=0;
  Main.magnifier_factor=DEFAULT_ZOOM_FACTOR;
  Main.separator_proportion=INITIAL_SEPARATOR_PROPORTION;
  Spare.separator_proportion=INITIAL_SEPARATOR_PROPORTION;
    // On initialise les infos du mode smear:
  Smear_mode=0;
  Smear_brush_width=PAINTBRUSH_WIDTH;
  Smear_brush_height=PAINTBRUSH_HEIGHT;
    // On initialise les infos du mode smooth:
  Smooth_mode=0;
    // On initialise les infos du mode shade:
  Shade_mode=0;     // Les autres infos du Shade sont chargées avec la config
  Quick_shade_mode=0; // idem
    // On initialise les infos sur les dégradés:
  Gradient_pixel =Display_pixel; // Les autres infos sont chargées avec la config
    // On initialise les infos de la grille:
  Snap_mode=0;
  Snap_width=8;
  Snap_height=8;
  Snap_offset_X=0;
  Snap_offset_Y=0;
    // On initialise les infos du mode Colorize:
  Colorize_mode=0;          // Mode colorize inactif par défaut
  Colorize_opacity=50;      // Une interpolation de 50% par défaut
  Colorize_current_mode=0; // Par défaut, la méthode par interpolation
  Compute_colorize_table();
    // On initialise les infos du mode Tiling:
  Tiling_mode=0;  //   Pas besoin d'initialiser les décalages car ça se fait
                  // en prenant une brosse (toujours mis à 0).
    // On initialise les infos du mode Mask:
  Mask_mode=0;

    // Infos du Spray
  Airbrush_mode=1; // Mode Mono
  Airbrush_size=31;
  Airbrush_delay=1;
  Airbrush_mono_flow=10;
  memset(Airbrush_multi_flow,0,256);
  srand(time(NULL)); // On randomize un peu tout ça...

  // Initialisation des boutons
  Init_buttons();
  // Initialisation des opérations
  Init_operations();

  // Initialize the brush container
  Init_brush_container();

  Windows_open=0;

  // Paintbrush
  if (!(Paintbrush_sprite=(byte *)malloc(MAX_PAINTBRUSH_SIZE*MAX_PAINTBRUSH_SIZE))) Error(ERROR_MEMORY);

  // Load preset paintbrushes (uses Paintbrush_ variables)
  Init_paintbrushes();

  // Set a valid paintbrush afterwards
  *Paintbrush_sprite=1;
  Paintbrush_width=1;
  Paintbrush_height=1;
  Paintbrush_offset_X=0;
  Paintbrush_offset_Y=0;
  Paintbrush_shape=PAINTBRUSH_SHAPE_ROUND;

  #if defined(__GP2X__) || defined(__WIZ__) || defined(__CAANOO__)
  // Prefer cycling active by default
  Cycling_mode=1;
  #endif

  // Charger la configuration des touches
  Set_config_defaults();

  switch(Load_CFG(1))
  {
    case ERROR_CFG_MISSING:
      // Pas un problème, on a les valeurs par défaut.
      break;
    case ERROR_CFG_CORRUPTED:
      DEBUG("Corrupted CFG file.",0);
      break;
    case ERROR_CFG_OLD:
      DEBUG("Unknown CFG file version, not loaded.",0);
      break;
  }
  // Charger la configuration du .INI
  temp=Load_INI(&Config);
  if (temp)
    Error(temp);

  if(!Config.Allow_multi_shortcuts)
  {
    Remove_duplicate_shortcuts();
  }

  Compute_menu_offsets();

  file_in_command_line=Analyze_command_line(argc, argv, main_filename, main_directory, spare_filename, spare_directory);

  Current_help_section=0;
  Help_position=0;

  // Load sprites, palette etc.
  gfx = Load_graphics(Config.Skin_file, &initial_gradients);
  if (gfx == NULL)
  {
    gfx = Load_graphics(DEFAULT_SKIN_FILENAME, &initial_gradients);
    if (gfx == NULL)
    {
      printf("%s", Gui_loading_error_message);
      Error(ERROR_GUI_MISSING);
    }
  }
  Set_current_skin(Config.Skin_file, gfx);
  // Override colors
  // Gfx->Default_palette[MC_Black]=Config.Fav_menu_colors[0];
  // Gfx->Default_palette[MC_Dark] =Config.Fav_menu_colors[1];
  // Gfx->Default_palette[MC_Light]=Config.Fav_menu_colors[2];
  // Gfx->Default_palette[MC_White]=Config.Fav_menu_colors[3];

  // Even when using the skin's palette, if RGB range is small
  // the colors will be unusable.
  Compute_optimal_menu_colors(Gfx->Default_palette);

  // Infos sur les trames (Sieve)
  Sieve_mode=0;
  Copy_preset_sieve(0);

  // Font
  if (!(Menu_font=Load_font(Config.Font_file, 1)))
    if (!(Menu_font=Load_font(DEFAULT_FONT_FILENAME, 1)))
      {
        printf("Unable to open the default font file: %s\n", DEFAULT_FONT_FILENAME);
        Error(ERROR_GUI_MISSING);
      }
  Load_Unicode_fonts();

  memcpy(Main.palette, Gfx->Default_palette, sizeof(T_Palette));

  Fore_color=Best_color_range(255,255,255,Config.Palette_cells_X*Config.Palette_cells_Y);
  Back_color=Best_color_range(0,0,0,Config.Palette_cells_X*Config.Palette_cells_Y);

  // Allocation de mémoire pour la brosse
  if (!(Brush         =(byte *)malloc(   1*   1))) Error(ERROR_MEMORY);
  if (!(Smear_brush   =(byte *)malloc(MAX_PAINTBRUSH_SIZE*MAX_PAINTBRUSH_SIZE))) Error(ERROR_MEMORY);


  starting_videomode=Current_resolution;
  Horizontal_line_buffer=NULL;
  Screen_width=Screen_height=Current_resolution=0;

  Init_mode_video(
    Video_mode[starting_videomode].Width,
    Video_mode[starting_videomode].Height,
    Video_mode[starting_videomode].Fullscreen,
    Pixel_ratio);

  // Windows only: move back the window to its original position.
  #if defined(WIN32)
  if (!Video_mode[starting_videomode].Fullscreen)
  {
    if (Config.Window_pos_x != 9999 && Config.Window_pos_y != 9999)
    {
      //RECT r;
      #if defined(USE_SDL) || defined(USE_SDL2)
      //GetWindowRect(window, &r);
      SetWindowPos(GFX2_Get_Window_Handle(), 0, Config.Window_pos_x, Config.Window_pos_y, 0, 0, SWP_NOSIZE);
      #endif
    }
  }

  // Open a console for debugging...
  //ActivateConsole();
  #endif

  Main.image_width=Screen_width/Pixel_width;
  Main.image_height=Screen_height/Pixel_height;
  Spare.image_width=Screen_width/Pixel_width;
  Spare.image_height=Screen_height/Pixel_height;

  starting_image_mode = Config.Default_mode_layers ?
    IMAGE_MODE_LAYERED : IMAGE_MODE_ANIMATION;
  // Allocation de mémoire pour les différents écrans virtuels (et brosse)
  if (Init_all_backup_lists(starting_image_mode , Screen_width, Screen_height)==0)
    Error(ERROR_MEMORY);
  // Update toolbars' visibility, now that the current image has a mode
  Check_menu_mode();

  // Nettoyage de l'écran virtuel (les autres recevront celui-ci par copie)
  memset(Main_screen,0,Main.image_width*Main.image_height);

  // If image size was specified on command line, set that now
  if (setsize_width != 0 && setsize_height != 0)
  {
    Main.image_width=setsize_width;
    Main.image_height=setsize_height;
    Spare.image_width=setsize_width;
    Spare.image_height=setsize_height;
  }

  // Now that the backup system is there, we can store the gradients.
  memcpy(Main.backups->Pages->Gradients->Range, initial_gradients.Range, sizeof(initial_gradients.Range));
  memcpy(Spare.backups->Pages->Gradients->Range, initial_gradients.Range, sizeof(initial_gradients.Range));

  Gradient_function=Gradient_basic;
  Gradient_lower_bound=0;
  Gradient_upper_bound=0;
  Gradient_random_factor=1;
  Gradient_bounds_range=1;

  Current_gradient=0;

  // Initialisation de diverses variables par calcul:
  Compute_magnifier_data();
  Compute_limits();
  Compute_paintbrush_coordinates();

  // On affiche le menu:
  Display_paintbrush_in_menu();
  Display_sprite_in_menu(BUTTON_PAL_LEFT,Config.Palette_vertical?MENU_SPRITE_VERTICAL_PALETTE_SCROLL:-1);
  Display_menu();
  Draw_menu_button(BUTTON_PAL_LEFT,BUTTON_RELEASED);
  Draw_menu_button(BUTTON_PAL_RIGHT,BUTTON_RELEASED);

  // On affiche le curseur pour débuter correctement l'état du programme:
  Display_cursor();

  Spare.image_is_modified=0;
  Main.image_is_modified=0;

  // Gestionnaire de signaux, quand il ne reste plus aucun espoir
  Init_sighandler();

  // Le programme débute en mode de dessin à la main
  Select_button(BUTTON_DRAW,LEFT_SIDE);

  // On initialise la brosse initiale à 1 pixel blanc:
  Brush_width=1;
  Brush_height=1;
  for (temp=0;temp<256;temp++)
    Brush_colormap[temp]=temp;
  Capture_brush(0,0,0,0,0);
  *Brush=MC_White;
  *Brush_original_pixels=MC_White;

  // Make sure the load dialog points to the right place when first shown.
  // Done after loading everything else, but before checking for emergency
  // backups
  if (file_in_command_line > 0)
  {
    strcpy(Main.selector.Directory, main_directory);
  }

  // Test de recuperation de fichiers sauvés
  switch (Check_recovery())
  {
    T_IO_Context context;

    default:
      // Some files were loaded from last crash-exit.
      // Do not load files from command-line, nor show splash screen.
      Compute_optimal_menu_colors(Main.palette);
      Check_menu_mode();
      Display_all_screen();
      Display_menu();
      Display_cursor();
      Verbose_message("Images recovered",
        "Grafx2 has recovered images from\n"
        "last session, before a crash or\n"
        "shutdown. Browse the history using\n"
        "the Undo/Redo button, and when\n"
        "you find a state that you want to\n"
        "save, use the 'Save as' button to\n"
        "save the image.\n"
        "Some backups can be present in\n"
        "the spare page too.\n");
      break;

    case -1: // Unable to write lock file
      Verbose_message("Warning",
        "Safety backups (every minute) are\n"
        "disabled because Grafx2 is running\n"
        "from a read-only device, or other\n"
        "instances are running.");
      break;

    case 0:

      switch (file_in_command_line)
      {
        case 0:
          if (Config.Opening_message)
            Button_Message_initial();
          break;

        case 2:
          // Load this file
          Init_context_layered_image(&context, spare_filename, spare_directory);
          Load_image(&context);
          Destroy_context(&context);
          Redraw_layered_image();
          End_of_modification();

          Button_Page(BUTTON_PAGE);
          // no break ! proceed with the other file now
        case 1:
          Init_context_layered_image(&context, main_filename, main_directory);
#ifdef ENABLE_FILENAMES_ICONV
          {
            char * input = main_filename;
            size_t inbytesleft = strlen(main_filename);
            char * output = (char *)main_filename_unicode;
            size_t outbytesleft = sizeof(main_filename_unicode) - 2;
            if (cd_utf16 != (iconv_t)-1)
            {
              size_t r = iconv(cd_utf16, &input, &inbytesleft, &output, &outbytesleft);
              if (r != (size_t)-1)
              {
                output[0] = '\0';
                output[1] = '\0';
                context.File_name_unicode = main_filename_unicode;
              }
            }
          }
#endif
          Load_image(&context);
          Destroy_context(&context);
          Redraw_layered_image();
          End_of_modification();

          // If only one image was loaded, assume the spare has same image type
          if (file_in_command_line==1)
            Spare.backups->Pages->Image_mode = Main.backups->Pages->Image_mode;

          Hide_cursor();
          Compute_optimal_menu_colors(Main.palette);
          Back_color=Main.backups->Pages->Background_transparent ?
            Main.backups->Pages->Transparent_color :
            Best_color_range(0,0,0,Config.Palette_cells_X*Config.Palette_cells_Y);
          Fore_color=Main.palette[Back_color].R+Main.palette[Back_color].G+Main.palette[Back_color].B < 3*127 ?
            Best_color_range(255,255,255,Config.Palette_cells_X*Config.Palette_cells_Y) :
            Best_color_range(0,0,0,Config.Palette_cells_X*Config.Palette_cells_Y);
          Check_menu_mode();
          Display_all_screen();
          Display_menu();
          Display_cursor();
          Resolution_in_command_line = 0;
          break;

        default:
          break;
      }
  }

  Allow_drag_and_drop(1);

  return(1);
}

// ------------------------- Program Shutdown --------------------------
// Free all allocated resources

#define FREE_POINTER(p) free(p); p = NULL

void Program_shutdown(void)
{
  int      i;
  int      return_code;

  // Windows only: Recover the window position.
  #if defined(WIN32)
  #if defined(USE_SDL) || defined(USE_SDL2)
  {
    RECT r;
    GetWindowRect(GFX2_Get_Window_Handle(), &r);

    Config.Window_pos_x = r.left;
    Config.Window_pos_y = r.top;
  }
  #endif
  // Config.Window_pos_x / Config.Window_pos_y are set in win32screen.c
  #else
  // All other targets: irrelevant dimensions.
  // Do not attempt to force them back on next program run.
    Config.Window_pos_x = 9999;
    Config.Window_pos_y = 9999;
  #endif

  // Remove the safety backups, this is normal exit
  Delete_safety_backups();

  // On libère le buffer de gestion de lignes
  free(Horizontal_line_buffer);
  Horizontal_line_buffer = NULL;

  // On libère le pinceau spécial
  free(Paintbrush_sprite);
  Paintbrush_sprite = NULL;

  // Free Brushes
  FREE_POINTER(Brush);
  FREE_POINTER(Smear_brush);
  FREE_POINTER(Brush_original_pixels);

  // Free all images
  Set_number_of_backups(-1); // even delete the main page

  FREE_POINTER(Main.visible_image.Image);
  FREE_POINTER(Spare.visible_image.Image);
  FREE_POINTER(Main_visible_image_backup.Image);
  FREE_POINTER(Main_visible_image_depth_buffer.Image);

  FREE_POINTER(Main.backups);
  FREE_POINTER(Spare.backups);

  // Free the skin (Gui graphics) data
  free(Gfx);
  Gfx=NULL;

  free(Menu_font);
  Menu_font = NULL;
  while (Unicode_fonts != NULL)
  {
    T_Unicode_Font * ufont = Unicode_fonts->Next;
    free(Unicode_fonts->FontData);
    free(Unicode_fonts);
    Unicode_fonts = ufont;
  }

  // On prend bien soin de passer dans le répertoire initial:
  if (Change_directory(Initial_directory)==0)
  {
    // On sauvegarde les données dans le .CFG et dans le .INI
    if (Config.Auto_save)
    {
      return_code=Save_CFG();
      if (return_code)
        Error(return_code);
      return_code=Save_INI(&Config);
      if (return_code)
        Error(return_code);
    }
  }
  else
    Error(ERROR_MISSING_DIRECTORY);

  // Free Config
  FREE_POINTER(Config.Skin_file);
  FREE_POINTER(Config.Font_file);
  for (i=0;i<NB_BOOKMARKS;i++)
  {
    FREE_POINTER(Config.Bookmark_directory[i]);
  }

  Uninit_text();

#ifdef ENABLE_FILENAMES_ICONV
  if (cd != (iconv_t)-1)
    iconv_close(cd);
  if (cd_inv != (iconv_t)-1)
    iconv_close(cd_inv);
  if (cd_utf16 != (iconv_t)-1)
    iconv_close(cd_utf16);
  if (cd_utf16_inv != (iconv_t)-1)
    iconv_close(cd_utf16_inv);
#endif

#if defined(USE_SDL) || defined(USE_SDL2)
  SDL_Quit();
#endif

  #if defined(__GP2X__) || defined(__WIZ__) || defined(__CAANOO__)
  chdir("/usr/gp2x");
  execl("/usr/gp2x/gp2xmenu", "/usr/gp2x/gp2xmenu", NULL);
  #endif

}


// -------------------------- Procédure principale ---------------------------
#if defined(WIN32) && !defined(USE_SDL) && !defined(USE_SDL2)
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
#else
int main(int argc,char * argv[])
#endif
{
#if defined(WIN32) && !defined(USE_SDL) && !defined(USE_SDL2)
  TCHAR ModuleFileName[MAX_PATH];
  TCHAR TmpArg[MAX_PATH];
  TCHAR ShortFileName[MAX_PATH];
  int i, j, k;
  int inquote = 0;
  int argc = 0;
  char arg_buffer[4096];
  char * argv[64] = {NULL};

  Init_Win32(hInstance, hPrevInstance);
  if (GetModuleFileName(NULL, ModuleFileName, MAX_PATH) == 0)
  {
    MessageBoxA(NULL, "Error initializing program", NULL, MB_OK | MB_ICONERROR);
    return 1;
  }
  GetShortPathName(ModuleFileName, ShortFileName, MAX_PATH);
  argv[argc++] = arg_buffer;
  for (i = 0; i < (int)sizeof(arg_buffer); )
  {
    arg_buffer[i] = (char)ShortFileName[i];
    if (arg_buffer[i++] == 0) break;
  }
  k = 0;
  for (j = 0; pCmdLine[j] != 0 && k < MAX_PATH - 1; j++)
  {
    if (inquote)
    {
      if (pCmdLine[j] == '"')
      {
        inquote = 0;
        continue;
      }
    }
    else
    {
      if (pCmdLine[j] == '"')
      {
        inquote = 1;
        continue;
      }
      if (pCmdLine[j] == ' ' || pCmdLine[j] == '\t')
      { // next argument
        TmpArg[k++] = '\0';
        argv[argc++] = arg_buffer + i;
        if (GetShortPathName(TmpArg, ShortFileName, MAX_PATH) > 0)
        {
          for (k = 0; ShortFileName[k] != 0; k++)
            arg_buffer[i++] = ShortFileName[k];
        }
        else
        {
          for (k = 0; TmpArg[k] != 0; k++)
            arg_buffer[i++] = TmpArg[k];
        }
        arg_buffer[i++] = 0;
        k = 0;
        continue;
      }
    }
    TmpArg[k++] = pCmdLine[j];
  }
  TmpArg[k] = '\0';
  if (k > 0)
  {
    argv[argc++] = arg_buffer + i;
    if (GetShortPathName(TmpArg, ShortFileName, MAX_PATH) > 0)
    {
      for (k = 0; ShortFileName[k] != 0; k++)
        arg_buffer[i++] = ShortFileName[k];
    }
    else
    {
      for (k = 0; TmpArg[k] != 0; k++)
        arg_buffer[i++] = TmpArg[k];
    }
    arg_buffer[i++] = 0;
  }

  // TODO : nCmdShow indicates if the window must be maximized, etc.
#endif
  if(!Init_program(argc,argv))
  {
    Program_shutdown();
    return 0;
  }

  Main_handler();

  Program_shutdown();
  return 0;
}

#if defined(WIN32) && !defined(USE_SDL) && !defined(USE_SDL2) && !defined(_MSC_VER)
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR _lpCmdLine, int nCmdShow)
{
  WCHAR *lpCmdLine = GetCommandLineW();
  if (__argc == 1)
  { // avoids GetCommandLineW bug that does not always quote the program name if no arguments
    do { ++lpCmdLine; } while (*lpCmdLine);
  }
  else
  {
    BOOL quoted = lpCmdLine[0] == L'"';
    ++lpCmdLine; // skips the " or the first letter (all paths are at least 1 letter)
    while (*lpCmdLine)
    {
      if (quoted && lpCmdLine[0] == L'"') quoted = FALSE; // found end quote
      else if (!quoted && lpCmdLine[0] == L' ')
      { // found an unquoted space, now skip all spaces
        do { ++lpCmdLine; } while (lpCmdLine[0] == L' ');
        break;
      }
      ++lpCmdLine;
    }
  }
  return wWinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow);
}
#endif