tuxpaint-pencil-sharpener/magic/src/alien.c

/*
  alien.c
//
  alien, Modifies the colours of the image.
  Tux Paint - A simple drawing program for children.

  Credits: Andrew Corcoran <akanewbie@gmail.com> inspired by the Alien Map GIMP plugin

  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

static const double alien_ANGLE[] = {0,0,0};
static const double alien_FREQUENCY[] = {1,1,1};
static const int alien_RADIUS = 16;

enum {
	TOOL_alien,
	alien_NUM_TOOLS
};

static Mix_Chunk * alien_snd_effect[alien_NUM_TOOLS];

const char * alien_snd_filenames[alien_NUM_TOOLS] = {
  "alien.ogg",
};
const char * alien_icon_filenames[alien_NUM_TOOLS] = {
  "alien.png",
};
const char * alien_names[alien_NUM_TOOLS] = {
  gettext_noop("Color Shift"),
};
const char * alien_descs[alien_NUM_TOOLS][2] = {
  {gettext_noop("Click and move the mouse to change the colors in parts of your picture."),
    gettext_noop("Click to change the colors in your entire picture."),},
};

// Prototypes
Uint32 alien_api_version(void);
int alien_init(magic_api * api);
int alien_get_tool_count(magic_api * api);
SDL_Surface * alien_get_icon(magic_api * api, int which);
char * alien_get_name(magic_api * api, int which);
char * alien_get_description(magic_api * api, int which, int mode);
void alien_drag(magic_api * api, int which, SDL_Surface * canvas,
	          SDL_Surface * last, int ox, int oy, int x, int y,
		  SDL_Rect * update_rect);
Mix_Chunk * magic_loadsound(char* file);
void alien_click(magic_api * api, int which, int mode,
	           SDL_Surface * canvas, SDL_Surface * last,
	           int x, int y, SDL_Rect * update_rect);
void alien_release(magic_api * api, int which,
	           SDL_Surface * canvas, SDL_Surface * last,
	           int x, int y, SDL_Rect * update_rect);
void alien_shutdown(magic_api * api);
void alien_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int alien_requires_colors(magic_api * api, int which);
void alien_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void alien_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int alien_modes(magic_api * api, int which);


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

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

  srand(time(0));

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

int alien_get_tool_count(magic_api * api ATTRIBUTE_UNUSED){
  return(alien_NUM_TOOLS);
}

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

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

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

//Do the effect for one pixel
static void do_alien_pixel(void * ptr, int which ATTRIBUTE_UNUSED,
	         SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED,
	         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++){
//EP      temp2[k] = clamp(0,127.5 * (1.0 + sin (((temp[k] / 127.5 - 1.0) * alien_FREQUENCY[k] + alien_ANGLE[k] / 180.0) * M_PI)),255);
          temp2[k] = clamp(0.0,
                                           127.5 * (
                                                                1.0 + sin (((temp[k] / 127.5 - 1.0) * alien_FREQUENCY[k] + alien_ANGLE[k] / 180.0) * M_PI)
                                                                ),
                                           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_alien_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_alien_pixel(ptr, which, canvas, last, x, y);
	  }
  }
}

//do the effect for the brush
static void do_alien_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 - alien_RADIUS; yy < y + alien_RADIUS; yy++)
  {
    for (xx = x - alien_RADIUS; xx < x + alien_RADIUS; xx++)
    {
      if (api->in_circle(xx - x, yy - y, alien_RADIUS) &&
	  !api->touched(xx, yy))
      {
        do_alien_pixel(api, which, canvas, last, xx, yy);
      }
    }
  }
}

// Affect the canvas on drag:
void alien_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_alien_brush);

  api->playsound(alien_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 - alien_RADIUS;
  update_rect->y = oy - alien_RADIUS;
  update_rect->w = (x + alien_RADIUS) - update_rect->x;
  update_rect->h = (y + alien_RADIUS) - update_rect->y;
}

int use_sound = 1;

Mix_Chunk * magic_loadsound(char* file){
  Mix_Chunk * temp;

  if (!use_sound){
    return (Mix_Chunk*)-1;
  }
  temp = Mix_LoadWAV(file);
  return temp;
}

// Affect the canvas on click:
void alien_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)
    alien_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_alien_full(api, canvas,  last, which);
    api->playsound(alien_snd_effect[which], 128, 255);
  }
}

// Affect the canvas on release:
void alien_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 alien_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
	//Clean up sounds
	int i;
	for(i=0; i<alien_NUM_TOOLS; i++){
		if(alien_snd_effect[i] != NULL){
			Mix_FreeChunk(alien_snd_effect[i]);
		}
	}
}

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

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

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

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

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