/*
  noise.c

  noise,Add noise the whole 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: noise.c,v 1.10 2009/05/26 16:10:00 dolphin6k Exp $
*/

#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

static const int noise_AMOUNT = 100.0;
static const int noise_RADIUS = 16;

enum {
	TOOL_NOISE,
	noise_NUM_TOOLS
};

static Mix_Chunk * noise_snd_effect[noise_NUM_TOOLS];

const char * noise_snd_filenames[noise_NUM_TOOLS] = {
  "noise.ogg",
};
const char * noise_icon_filenames[noise_NUM_TOOLS] = {
  "noise.png",
};
const char * noise_names[noise_NUM_TOOLS] = {
  gettext_noop("Noise"),
};
const char * noise_descs[noise_NUM_TOOLS][2] = {
  {gettext_noop("Click and move the mouse to add noise to parts of your picture."),
    gettext_noop("Click to add noise to your entire picture."),},
};

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

//Load sounds
int noise_init(magic_api * api){
  int i;
  char fname[1024];

  srand(time(0));

  for (i = 0; i < noise_NUM_TOOLS; i++){
    snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, noise_snd_filenames[i]);
    noise_snd_effect[i] = Mix_LoadWAV(fname);
  }
  return(1);
}

int noise_get_tool_count(magic_api * api){
  return(noise_NUM_TOOLS);
}

// Load our icons:
SDL_Surface * noise_get_icon(magic_api * api, int which){
  char fname[1024];
  snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, noise_icon_filenames[which]);
  return(IMG_Load(fname));
}

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

// Return our descriptions, localized:
char * noise_get_description(magic_api * api, int which, int mode){
  return(strdup(gettext_noop(noise_descs[which][mode-1])));
}

//Do the effect for one pixel
static void do_noise_pixel(void * ptr, int which,
	         SDL_Surface * canvas, SDL_Surface * last,
	         int x, int y){
	magic_api * api = (magic_api *) ptr;

  Uint8 temp[3];
  double temp2[3];
  int k;

	SDL_GetRGB(api->getpixel(canvas,x, y), canvas->format, &temp[0], &temp[1], &temp[2]);
  for (k =0;k<3;k++){
		temp2[k] = clamp(0.0, (int)temp[k] - (rand()%noise_AMOUNT) + noise_AMOUNT/2.0, 255.0);
  }
	api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, temp2[0], temp2[1], temp2[2]));

}

// Do the effect for the full image
static void do_noise_full(void * ptr,SDL_Surface * canvas, SDL_Surface * last, int which){

	magic_api * api = (magic_api *) ptr;

	int x,y;

	for (y = 0; y < last->h; y++){
		for (x=0; x < last->w; x++){
      do_noise_pixel(ptr, which, canvas, last, x, y);
	  }
  }
}

//do the effect for the brush
static void do_noise_brush(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y){
  int xx, yy;
  magic_api * api = (magic_api *) ptr;

  for (yy = y - noise_RADIUS; yy < y + noise_RADIUS; yy++)
  {
    for (xx = x - noise_RADIUS; xx < x + noise_RADIUS; xx++)
    {
      if (api->in_circle(xx - x, yy - y, noise_RADIUS) &&
	  !api->touched(xx, yy))
      {
        do_noise_pixel(api, which, canvas, last, xx, yy);
      }
    }
  }
}

// Affect the canvas on drag:
void noise_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_noise_brush);

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

  if (ox > x) { int tmp = ox; ox = x; x = tmp; }
  if (oy > y) { int tmp = oy; oy = y; y = tmp; }

  update_rect->x = ox - noise_RADIUS;
  update_rect->y = oy - noise_RADIUS;
  update_rect->w = (x + noise_RADIUS) - update_rect->x;
  update_rect->h = (y + noise_RADIUS) - update_rect->y;
}

// Affect the canvas on click:
void noise_click(magic_api * api, int which, int mode,
	           SDL_Surface * canvas, SDL_Surface * last,
	           int x, int y, SDL_Rect * update_rect){
  if (mode == MODE_PAINT)
    noise_drag(api, which, canvas, last, x, y, x, y, update_rect);
  else{
    update_rect->x = 0;
    update_rect->y = 0;
    update_rect->w = canvas->w;
    update_rect->h = canvas->h;
    do_noise_full(api, canvas,  last, which);
    api->playsound(noise_snd_effect[which], 128, 255);
  }
}

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

// No setup happened:
void noise_shutdown(magic_api * api)
{
	//Clean up sounds
	int i;
	for(i=0; i<noise_NUM_TOOLS; i++){
		if(noise_snd_effect[i] != NULL){
			Mix_FreeChunk(noise_snd_effect[i]);
		}
	}
}

// Record the color from Tux Paint:
void noise_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
{
}

// Use colors:
int noise_requires_colors(magic_api * api, int which)
{
  return 0;
}

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

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

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