/*
  blind.c

  BLIND Magic Tools Plugin
  Tux Paint - A simple drawing program for children.

  By Pere Pujal Carabantes

  Copyright (c) 2009-2021
  http://www.tuxpaint.org/

  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
  (See COPYING.txt)
*/

#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"

int BLIND_RADIUS = 16;
int BLIND_OPAQUE = 20;
int BLIND_THICKNESS = 30;
int blind_side;                 /* 0 top, 1 left, 2 bottom, 3 right */

static Uint8 blind_r, blind_g, blind_b, blind_light;
enum blind_sides
{
  BLIND_SIDE_TOP,
  BLIND_SIDE_LEFT,
  BLIND_SIDE_BOTTOM,
  BLIND_SIDE_RIGHT
};

enum blind_tools
{
  BLIND_TOOL_BLIND,
  BLIND_NUMTOOLS
};

Mix_Chunk *blind_snd;

// Prototypes
Uint32 blind_api_version(void);
void blind_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int blind_init(magic_api * api);
int blind_get_tool_count(magic_api * api);
SDL_Surface *blind_get_icon(magic_api * api, int which);
char *blind_get_name(magic_api * api, int which);
int blind_get_group(magic_api * api, int which);
char *blind_get_description(magic_api * api, int which, int mode);
int blind_requires_colors(magic_api * api, int which);
void blind_release(magic_api * api, int which,
                   SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y, SDL_Rect * update_rect);
void blind_shutdown(magic_api * api);
void blind_paint_blind(void *ptr_to_api, int which_tool, SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y);
void blind_drag(magic_api * api, int which, SDL_Surface * canvas,
                SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect);
void blind_click(magic_api * api, int which, int mode,
                 SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void blind_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void blind_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int blind_modes(magic_api * api, int which);

//                              Housekeeping functions

Uint32 blind_api_version(void)
{
  return (TP_MAGIC_API_VERSION);
}

void blind_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r, Uint8 g, Uint8 b)       //get the colors from API and store it in structure
{
  blind_r = r;
  blind_g = g;
  blind_b = b;
}

int blind_init(magic_api * api)
{
  char fname[1024];

  snprintf(fname, sizeof(fname), "%ssounds/magic/blind.ogg", api->data_directory);
  blind_snd = Mix_LoadWAV(fname);

  return (1);
}

int blind_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
  return BLIND_NUMTOOLS;
}

SDL_Surface *blind_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
{
  char fname[1024];

  snprintf(fname, sizeof(fname), "%simages/magic/blind.png", api->data_directory);

  return (IMG_Load(fname));
}

char *blind_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return strdup(gettext_noop("Blind"));
}

int blind_get_group(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return MAGIC_TYPE_PICTURE_DECORATIONS;
}

char *blind_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
  return
    strdup(gettext_noop
           ("Click towards the edge of your picture to pull window blinds over it. Move perpendicularly to open or close the blinds."));
}

int blind_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return 1;
}

void blind_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
                   SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * snapshot ATTRIBUTE_UNUSED,
                   int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
}

void blind_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
  Mix_FreeChunk(blind_snd);
}

// Interactivity functions

void blind_paint_blind(void *ptr_to_api, int which_tool ATTRIBUTE_UNUSED,
                       SDL_Surface * canvas, SDL_Surface * snapshot ATTRIBUTE_UNUSED, int x, int y)
{
  magic_api *api = (magic_api *) ptr_to_api;

  api->putpixel(canvas, x, y,
                SDL_MapRGB(canvas->format, (blind_r + blind_light) / 2, (blind_g + blind_light) / 2,
                           (blind_b + blind_light) / 2));
}

/* void blind_do_blind(void * ptr_to_api, int which_tool,
               SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y)
{
	magic_api * api = (magic_api *) ptr_to_api;
	
	api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 128, 128, 165));
	//api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 0, 0, 255));
}

*/
void blind_drag(magic_api * api, int which, SDL_Surface * canvas,
                SDL_Surface * snapshot, int ox, int oy, int x, int y, SDL_Rect * update_rect)
{
  int opaque;

  SDL_BlitSurface(snapshot, NULL, canvas, NULL);
  switch (blind_side)
    {
      int i, j;

    case BLIND_SIDE_TOP:
      opaque = max((x * BLIND_THICKNESS) / canvas->w + 2, 2);
      for (i = y; i >= 0; i -= BLIND_THICKNESS)
        {
          blind_light = 255;
          for (j = i; j > i - opaque / 2; j--)
            {
              api->line(api, which, canvas, snapshot, 0, j, canvas->w, j, 1, blind_paint_blind);
              blind_light -= 20;
            }
          for (j = i - opaque / 2; j > i - opaque; j--)
            {
              api->line(api, which, canvas, snapshot, 0, j, canvas->w, j, 1, blind_paint_blind);
              blind_light += 20;
            }
        }
      update_rect->x = 0;
      update_rect->y = 0;
      update_rect->w = canvas->w;
      update_rect->h = max(oy, y);
      api->playsound(blind_snd, 128, 255);
      break;

    case BLIND_SIDE_BOTTOM:
      opaque = max((x * BLIND_THICKNESS) / canvas->w + 2, 2);
      for (i = y; i <= canvas->h; i += BLIND_THICKNESS)
        {
          blind_light = 255;
          for (j = i; j < i + opaque / 2; j++)
            {
              api->line(api, which, canvas, snapshot, 0, j, canvas->w, j, 1, blind_paint_blind);
              blind_light -= 20;
            }
          for (j = i + opaque / 2; j < i + opaque; j++)
            {
              api->line(api, which, canvas, snapshot, 0, j, canvas->w, j, 1, blind_paint_blind);
              blind_light += 20;
            }
        }

      update_rect->x = 0;
      update_rect->y = min(oy, y);
      update_rect->w = canvas->w;
      update_rect->h = canvas->h - update_rect->y;
      api->playsound(blind_snd, 128, 255);
      break;

    case BLIND_SIDE_RIGHT:
      opaque = max((y * BLIND_THICKNESS) / canvas->h + 2, 2);
      for (i = x; i <= canvas->w; i += BLIND_THICKNESS)
        {
          blind_light = 255;
          for (j = i; j < i + opaque / 2; j++)
            {
              api->line(api, which, canvas, snapshot, j, 0, j, canvas->h, 1, blind_paint_blind);
              blind_light -= 20;
            }
          for (j = i + opaque / 2; j < i + opaque; j++)
            {
              api->line(api, which, canvas, snapshot, j, 0, j, canvas->h, 1, blind_paint_blind);
              blind_light += 20;
            }
        }

      update_rect->x = min(ox, x);
      update_rect->y = 0;
      update_rect->w = canvas->w - update_rect->x;
      update_rect->h = canvas->h;
      api->playsound(blind_snd, (x * 255) / canvas->w, 255);
      break;

    case BLIND_SIDE_LEFT:
      opaque = max((y * BLIND_THICKNESS) / canvas->h + 2, 2);
      for (i = x; i >= 0; i -= BLIND_THICKNESS)
        {
          blind_light = 255;
          for (j = i; j > i - opaque / 2; j--)
            {
              api->line(api, which, canvas, snapshot, j, 0, j, canvas->h, 1, blind_paint_blind);
              blind_light -= 20;
            }
          for (j = i - opaque / 2; j > i - opaque; j--)
            {
              api->line(api, which, canvas, snapshot, j, 0, j, canvas->h, 1, blind_paint_blind);
              blind_light += 20;
            }
        }
      update_rect->x = 0;
      update_rect->y = 0;
      update_rect->w = max(ox, x);
      update_rect->h = canvas->h;
      api->playsound(blind_snd, (x * 255) / canvas->w, 255);
      break;

    }
}

void blind_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
                 SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
{
  if (y < canvas->h / 2)

    {
      if (x < y)
        blind_side = BLIND_SIDE_LEFT;
      else if (canvas->w - x < y)
        blind_side = BLIND_SIDE_RIGHT;
      else
        blind_side = BLIND_SIDE_TOP;
    }
  else
    {
      if (x < canvas->h - y)
        blind_side = BLIND_SIDE_LEFT;
      else if (canvas->w - x < canvas->h - y)
        blind_side = BLIND_SIDE_RIGHT;
      else
        blind_side = BLIND_SIDE_BOTTOM;
    }

  blind_drag(api, which, canvas, last, x, y, x, y, update_rect);
}

void blind_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
                    SDL_Surface * canvas ATTRIBUTE_UNUSED)
{

}

void blind_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
                     SDL_Surface * canvas ATTRIBUTE_UNUSED)
{

}

int blind_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return (MODE_FULLSCREEN | MODE_PAINT);
}
