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

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/*
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);
}
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