magic/src/toothpaste.c

/*
  toothpaste.c

  toothpaste, Add a toothpaste effect to the image
  Tux Paint - A simple drawing program for children.

  Credits: Andrew Corcoran <akanewbie@gmail.com>

  Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
  bill@newbreedsoftware.com
  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)

  Last updated: June 6, 2008
  $Id$
*/

#include <stdio.h>
#include <string.h>
#include <libintl.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
#include <math.h>
#include <limits.h>
#include <time.h>

#ifndef gettext_noop
#define gettext_noop(String) String
#endif

double pi;
static Uint8 toothpaste_r, toothpaste_g, toothpaste_b;
static const int toothpaste_RADIUS = 10;
double *toothpaste_weights = NULL;

enum
{
  TOOL_toothpaste,
  toothpaste_NUM_TOOLS
};

static Mix_Chunk *toothpaste_snd_effect[toothpaste_NUM_TOOLS];

const char *toothpaste_snd_filenames[toothpaste_NUM_TOOLS] = {
  "toothpaste.ogg",
};

const char *toothpaste_icon_filenames[toothpaste_NUM_TOOLS] = {
  "toothpaste.png",
};

const char *toothpaste_names[toothpaste_NUM_TOOLS] = {
  gettext_noop("Toothpaste"),
};

const char *toothpaste_descs[toothpaste_NUM_TOOLS] = {
  gettext_noop("Click and drag to squirt toothpaste onto your picture."),
};


Uint32 toothpaste_api_version(void);
int toothpaste_init(magic_api * api);
int toothpaste_get_tool_count(magic_api * api);
SDL_Surface *toothpaste_get_icon(magic_api * api, int which);
char *toothpaste_get_name(magic_api * api, int which);
char *toothpaste_get_description(magic_api * api, int which, int mode);
static void do_toothpaste(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
void toothpaste_drag(magic_api * api, int which, SDL_Surface * canvas,
                     SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect);
void toothpaste_click(magic_api * api, int which, int mode,
                      SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void toothpaste_release(magic_api * api, int which,
                        SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void toothpaste_shutdown(magic_api * api);
void toothpaste_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int toothpaste_requires_colors(magic_api * api, int which);
void toothpaste_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void toothpaste_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int toothpaste_modes(magic_api * api, int which);

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


int toothpaste_init(magic_api * api)
{

  int i;
  char fname[1024];
  int k, j;

  //Load sounds
  for (i = 0; i < toothpaste_NUM_TOOLS; i++)
    {
      snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, toothpaste_snd_filenames[i]);
      toothpaste_snd_effect[i] = Mix_LoadWAV(fname);
    }

  //Set up weights
  pi = acos(0.0) * 2;
  toothpaste_weights = (double *)malloc(toothpaste_RADIUS * 2 * toothpaste_RADIUS * 2 * sizeof(double));
  if (toothpaste_weights == NULL)
    {
      return (0);
    }

  for (k = -toothpaste_RADIUS; k < +toothpaste_RADIUS; k++)
    {
      for (j = -toothpaste_RADIUS; j < +toothpaste_RADIUS; j++)
        {
          if (api->in_circle(j, k, toothpaste_RADIUS))
            {
              toothpaste_weights[(k + toothpaste_RADIUS) * ((toothpaste_RADIUS * 2) - 1) + (j + toothpaste_RADIUS)] =
                ((fabs(atan2((double)(j), (double)(k)))) / pi);
            }
        }
    }

  return (1);
}

int toothpaste_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
  return (toothpaste_NUM_TOOLS);
}

// Load our icons:
SDL_Surface *toothpaste_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
{
  char fname[1024];

  snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, toothpaste_icon_filenames[which]);
  return (IMG_Load(fname));
}

// Return our names, localized:
char *toothpaste_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
{
  return (strdup(gettext_noop(toothpaste_names[which])));
}

// Return our descriptions, localized:
char *toothpaste_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode ATTRIBUTE_UNUSED)
{
  return (strdup(gettext_noop(toothpaste_descs[which])));
}

// Do the effect:
static void do_toothpaste(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas,
                          SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y)
{
  magic_api *api = (magic_api *) ptr;

  int xx, yy;

  // double colr;
  float h, s, v;
  Uint8 r, g, b;

  for (yy = y - toothpaste_RADIUS; yy < y + toothpaste_RADIUS; yy++)
    {
      for (xx = x - toothpaste_RADIUS; xx < x + toothpaste_RADIUS; xx++)
        {
          if (api->in_circle(xx - x, yy - y, toothpaste_RADIUS) && !api->touched(xx, yy))
            {

              api->rgbtohsv(toothpaste_r, toothpaste_g, toothpaste_b, &h, &s, &v);
              api->hsvtorgb(h, s,
                            toothpaste_weights[(yy - y + toothpaste_RADIUS) * ((toothpaste_RADIUS * 2) - 1) +
                                               (xx - x + toothpaste_RADIUS)], &r, &g, &b);
              api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));

            }
        }
    }

}

// Affect the canvas on drag:
void toothpaste_drag(magic_api * api, int which, SDL_Surface * canvas,
                     SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect)
{

  api->line((void *)api, which, canvas, last, ox, oy, x, y, 1, do_toothpaste);

  api->playsound(toothpaste_snd_effect[which], (x * 255) / canvas->w, 255);

  update_rect->x = 0;
  update_rect->y = 0;
  update_rect->w = canvas->w;
  update_rect->h = canvas->h;

}

// Affect the canvas on click:
void toothpaste_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
                      SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
{

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

// Affect the canvas on release:
void toothpaste_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
                        SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED,
                        int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
}

// No setup happened:
void toothpaste_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
  //Clean up sounds
  int i;

  for (i = 0; i < toothpaste_NUM_TOOLS; i++)
    {
      if (toothpaste_snd_effect[i] != NULL)
        {
          Mix_FreeChunk(toothpaste_snd_effect[i]);
        }
    }
  if (toothpaste_weights != NULL)
    {
      free(toothpaste_weights);
      toothpaste_weights = NULL;
    }
}

// Record the color from Tux Paint:
void toothpaste_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r, Uint8 g, Uint8 b)
{
  toothpaste_r = r;
  toothpaste_g = g;
  toothpaste_b = b;
}

// Use colors:
int toothpaste_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return 1;
}


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

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

int toothpaste_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
  return (MODE_PAINT);
}