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tuxpaint-pencil-sharpener/magic/src/cartoon.c
Bill Kendrick 44286395b3 indent cartoon.c
2017-10-15 11:43:06 -07:00

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/*
cartoon.c
Cartoon Magic Tool Plugin
Tux Paint - A simple drawing program for children.
Copyright (c) 2002-2008 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: July 8, 2008
$Id$
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
/* Our globals: */
static Mix_Chunk *cartoon_snd;
#define OUTLINE_THRESH 48
/* Local function prototypes: */
int cartoon_init(magic_api * api);
Uint32 cartoon_api_version(void);
int cartoon_get_tool_count(magic_api * api);
SDL_Surface *cartoon_get_icon(magic_api * api, int which);
char *cartoon_get_name(magic_api * api, int which);
char *cartoon_get_description(magic_api * api, int which, int mode);
static void do_cartoon(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
void cartoon_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 cartoon_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void cartoon_release(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void cartoon_shutdown(magic_api * api);
void cartoon_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b);
int cartoon_requires_colors(magic_api * api, int which);
void cartoon_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void cartoon_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int cartoon_modes(magic_api * api, int which);
// No setup required:
int cartoon_init(magic_api * api)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%s/sounds/magic/cartoon.wav", api->data_directory);
cartoon_snd = Mix_LoadWAV(fname);
return (1);
}
Uint32 cartoon_api_version(void)
{
return (TP_MAGIC_API_VERSION);
}
// We have multiple tools:
int cartoon_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return (1);
}
// Load our icons:
SDL_Surface *cartoon_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%s/images/magic/cartoon.png", api->data_directory);
return (IMG_Load(fname));
}
// Return our names, localized:
char *cartoon_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (strdup(gettext_noop("Cartoon")));
}
// Return our descriptions, localized:
char *cartoon_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return (strdup(gettext_noop("Click and drag the mouse around to turn the picture into a cartoon.")));
}
// Do the effect:
static void do_cartoon(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
magic_api *api = (magic_api *) ptr;
int xx, yy;
Uint8 r1, g1, b1, r2, g2, b2;
Uint8 r, g, b;
float hue, sat, val;
/* First, convert colors to more cartoony ones: */
for (yy = y - 16; yy < y + 16; yy = yy + 1)
{
for (xx = x - 16; xx < x + 16; xx = xx + 1)
{
if (api->in_circle(xx - x, yy - y, 16))
{
/* Get original color: */
SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
api->rgbtohsv(r, g, b, &hue, &sat, &val);
val = val - 0.5;
val = val * 4;
val = val + 0.5;
if (val < 0)
val = 0;
else if (val > 1.0)
val = 1.0;
val = floor(val * 4) / 4;
hue = floor(hue * 4) / 4;
sat = floor(sat * 4) / 4;
api->hsvtorgb(hue, sat, val, &r, &g, &b);
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
}
}
}
/* Then, draw dark outlines where there's a large contrast change */
for (yy = y - 16; yy < y + 16; yy++)
{
for (xx = x - 16; xx < x + 16; xx++)
{
if (api->in_circle(xx - x, yy - y, 16))
{
/* Get original color: */
SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
SDL_GetRGB(api->getpixel(last, xx + 1, yy), last->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(last, xx + 1, yy + 1), last->format, &r2, &g2, &b2);
if (abs(((r + g + b) / 3) - (r1 + g1 + b1) / 3) > OUTLINE_THRESH
|| abs(((r + g + b) / 3) - (r2 + g2 + b2) / 3) >
OUTLINE_THRESH || abs(r - r1) > OUTLINE_THRESH
|| abs(g - g1) > OUTLINE_THRESH
|| abs(b - b1) > OUTLINE_THRESH
|| abs(r - r2) > OUTLINE_THRESH || abs(g - g2) > OUTLINE_THRESH || abs(b - b2) > OUTLINE_THRESH)
{
api->putpixel(canvas, xx - 1, yy, SDL_MapRGB(canvas->format, 0, 0, 0));
api->putpixel(canvas, xx, yy - 1, SDL_MapRGB(canvas->format, 0, 0, 0));
api->putpixel(canvas, xx - 1, yy - 1, SDL_MapRGB(canvas->format, 0, 0, 0));
}
}
}
}
}
// Affect the canvas on drag:
void cartoon_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_cartoon);
if (ox > x)
{
int tmp = ox;
ox = x;
x = tmp;
}
if (oy > y)
{
int tmp = oy;
oy = y;
y = tmp;
}
update_rect->x = ox - 16;
update_rect->y = oy - 16;
update_rect->w = (x + 16) - update_rect->x;
update_rect->h = (y + 16) - update_rect->h;
api->playsound(cartoon_snd, (x * 255) / canvas->w, 255);
}
// Affect the canvas on click:
void cartoon_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
{
cartoon_drag(api, which, canvas, last, x, y, x, y, update_rect);
}
// Affect the canvas on release:
void cartoon_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 cartoon_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
if (cartoon_snd != NULL)
Mix_FreeChunk(cartoon_snd);
}
// Record the color from Tux Paint:
void cartoon_set_color(magic_api * api ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED,
Uint8 b ATTRIBUTE_UNUSED)
{
}
// Use colors:
int cartoon_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return 0;
}
void cartoon_switchin(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
void cartoon_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
int cartoon_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT); /* FIXME - Can also be turned into a full-image effect */
}
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