380 lines
11 KiB
C
380 lines
11 KiB
C
/*
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cartoon.c
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Cartoon Magic Tool Plugin
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Tux Paint - A simple drawing program for children.
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Copyright (c) 2002-2023 by Bill Kendrick and others; see AUTHORS.txt
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bill@newbreedsoftware.com
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https://tuxpaint.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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(See COPYING.txt)
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Last updated: February 12, 2023
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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/* Our globals: */
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static Mix_Chunk *cartoon_snd;
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SDL_Surface *result_surf;
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static int cartoon_radius = 16;
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#define OUTLINE_THRESH 48
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/* Local function prototypes: */
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int cartoon_init(magic_api * api, Uint32 disabled_features);
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Uint32 cartoon_api_version(void);
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int cartoon_get_tool_count(magic_api * api);
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SDL_Surface *cartoon_get_icon(magic_api * api, int which);
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char *cartoon_get_name(magic_api * api, int which);
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int cartoon_get_group(magic_api * api, int which);
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char *cartoon_get_description(magic_api * api, int which, int mode);
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void cartoon_apply_colors(magic_api * api, SDL_Surface * surf, int xx,
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int yy);
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void cartoon_apply_outline(magic_api * api, int xx, int yy);
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static void do_cartoon(void *ptr, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y);
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void cartoon_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y,
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SDL_Rect * update_rect);
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void cartoon_click(magic_api * api, int which, int mode, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void cartoon_release(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y,
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SDL_Rect * update_rect);
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void cartoon_shutdown(magic_api * api);
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void cartoon_set_color(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
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int cartoon_requires_colors(magic_api * api, int which);
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void cartoon_switchin(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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void cartoon_switchout(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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int cartoon_modes(magic_api * api, int which);
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Uint8 cartoon_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 cartoon_default_size(magic_api * api, int which, int mode);
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void cartoon_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size, SDL_Rect * update_rect);
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// No setup required:
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int cartoon_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%ssounds/magic/cartoon.wav",
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api->data_directory);
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cartoon_snd = Mix_LoadWAV(fname);
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return (1);
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}
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Uint32 cartoon_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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// We have multiple tools:
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int cartoon_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return (1);
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}
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// Load our icons:
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SDL_Surface *cartoon_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/cartoon.png",
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api->data_directory);
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return (IMG_Load(fname));
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}
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// Return our names, localized:
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char *cartoon_get_name(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return (strdup(gettext_noop("Cartoon")));
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}
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// Return our groups
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int cartoon_get_group(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_COLOR_FILTERS;
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}
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// Return our descriptions, localized:
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char *cartoon_get_description(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode)
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{
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if (mode == MODE_PAINT)
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{
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return (strdup
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(gettext_noop
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("Click and drag the mouse around to turn the picture into a cartoon.")));
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}
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else
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{
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return (strdup
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(gettext_noop
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("Click to turn the entire picture into a cartoon.")));
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}
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}
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// Do the effect:
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void cartoon_apply_colors(magic_api * api, SDL_Surface * surf, int xx, int yy)
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{
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Uint8 r, g, b;
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float hue, sat, val;
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SDL_GetRGB(api->getpixel(surf, xx, yy), surf->format, &r, &g, &b);
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api->rgbtohsv(r, g, b, &hue, &sat, &val);
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val = val - 0.5;
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val = val * 4;
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val = val + 0.5;
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if (val < 0)
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val = 0;
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else if (val > 1.0)
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val = 1.0;
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val = floor(val * 4) / 4;
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hue = floor(hue * 4) / 4;
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sat = floor(sat * 4) / 4;
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api->hsvtorgb(hue, sat, val, &r, &g, &b);
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api->putpixel(result_surf, xx, yy,
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SDL_MapRGB(result_surf->format, r, g, b));
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}
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void cartoon_apply_outline(magic_api * api, int xx, int yy)
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{
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Uint8 r, g, b;
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Uint8 r1, g1, b1, r2, g2, b2;
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SDL_GetRGB(api->getpixel(result_surf, xx, yy), result_surf->format, &r, &g,
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&b);
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SDL_GetRGB(api->getpixel(result_surf, xx + 1, yy), result_surf->format, &r1,
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&g1, &b1);
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SDL_GetRGB(api->getpixel(result_surf, xx + 1, yy + 1), result_surf->format,
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&r2, &g2, &b2);
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if (abs(((r + g + b) / 3) - (r1 + g1 + b1) / 3) > OUTLINE_THRESH
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|| abs(((r + g + b) / 3) - (r2 + g2 + b2) / 3) >
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OUTLINE_THRESH || abs(r - r1) > OUTLINE_THRESH
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|| abs(g - g1) > OUTLINE_THRESH
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|| abs(b - b1) > OUTLINE_THRESH
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|| abs(r - r2) > OUTLINE_THRESH || abs(g - g2) > OUTLINE_THRESH
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|| abs(b - b2) > OUTLINE_THRESH)
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{
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api->putpixel(result_surf, xx - 1, yy,
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SDL_MapRGB(result_surf->format, 0, 0, 0));
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api->putpixel(result_surf, xx, yy - 1,
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SDL_MapRGB(result_surf->format, 0, 0, 0));
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api->putpixel(result_surf, xx - 1, yy - 1,
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SDL_MapRGB(result_surf->format, 0, 0, 0));
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}
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}
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static void do_cartoon(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas,
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SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y)
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{
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magic_api *api = (magic_api *) ptr;
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int xx, yy;
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for (yy = y - cartoon_radius; yy < y + cartoon_radius; yy = yy + 1)
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{
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for (xx = x - cartoon_radius; xx < x + cartoon_radius; xx = xx + 1)
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{
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if (api->in_circle(xx - x, yy - y, cartoon_radius))
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{
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api->putpixel(canvas, xx, yy, api->getpixel(result_surf, xx, yy));
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}
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}
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}
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}
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// Affect the canvas on drag:
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void cartoon_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y,
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SDL_Rect * update_rect)
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{
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if (ox > x)
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{
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int tmp = ox;
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ox = x;
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x = tmp;
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}
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if (oy > y)
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{
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int tmp = oy;
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oy = y;
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y = tmp;
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}
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api->line((void *) api, which, canvas, last, ox, oy, x, y, 1, do_cartoon);
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update_rect->x = ox - cartoon_radius;
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update_rect->y = oy - cartoon_radius;
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update_rect->w = (x + cartoon_radius) - update_rect->x;
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update_rect->h = (y + cartoon_radius) - update_rect->y;
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api->playsound(cartoon_snd, (x * 255) / canvas->w, 255);
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}
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// Affect the canvas on click:
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void cartoon_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y,
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SDL_Rect * update_rect)
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{
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for (y = 0; y < canvas->h; y++)
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{
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if (y % 10 == 0)
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{
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api->update_progress_bar();
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}
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for (x = 0; x < canvas->w; x++)
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{
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cartoon_apply_colors(api, last, x, y);
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}
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}
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for (y = 0; y < canvas->h; y++)
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{
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if (y % 10 == 0)
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{
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api->update_progress_bar();
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}
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for (x = 0; x < canvas->w; x++)
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{
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cartoon_apply_outline(api, x, y);
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}
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}
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if (mode == MODE_PAINT)
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{
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cartoon_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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else
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{
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api->playsound(cartoon_snd, 128, 255);
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SDL_BlitSurface(result_surf, NULL, canvas, NULL);
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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}
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// Affect the canvas on release:
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void cartoon_release(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED,
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int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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// No setup happened:
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void cartoon_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (cartoon_snd != NULL)
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Mix_FreeChunk(cartoon_snd);
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}
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// Record the color from Tux Paint:
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void cartoon_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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// Use colors:
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int cartoon_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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void cartoon_switchin(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas)
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{
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Uint32 amask;
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amask =
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~(canvas->format->Rmask | canvas->format->Gmask | canvas->format->Bmask);
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result_surf = SDL_CreateRGBSurface(SDL_SWSURFACE,
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canvas->w,
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canvas->h,
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canvas->format->BitsPerPixel,
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canvas->format->Rmask,
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canvas->format->Gmask,
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canvas->format->Bmask, amask);
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}
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void cartoon_switchout(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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if (result_surf != NULL)
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SDL_FreeSurface(result_surf);
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}
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int cartoon_modes(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return (MODE_PAINT | MODE_FULLSCREEN);
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}
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Uint8 cartoon_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode)
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{
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if (mode == MODE_PAINT)
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return 8;
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else
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return 0;
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}
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Uint8 cartoon_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return 4;
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}
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void cartoon_set_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 size, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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cartoon_radius = size * 4;
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}
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