/* 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: cartoon.c,v 1.12 2011/11/26 22:04:50 perepujal Exp $ */ #include #include #include #include #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 move 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 */ }