44d7d0ee5d
Slight change to its default behavior re: pointer variables (before: "type * var"; now seems to prefer: "type *var").
266 lines
8 KiB
C
266 lines
8 KiB
C
/*
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xor.c
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Draws pixels which color depends on previous hue value
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(in HSV model) and coordinates
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Tux Paint - A simple drawing program for children.
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Copyright (c) 2013-2024 by Lukasz Dmitrowski
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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: October 7, 2024
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*/
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#include <stdio.h>
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#include <string.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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static Mix_Chunk *xor_snd;
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static int xor_radius = 16;
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Uint32 xor_api_version(void);
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int xor_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
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int xor_get_tool_count(magic_api * api);
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SDL_Surface *xor_get_icon(magic_api * api, int which);
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char *xor_get_name(magic_api * api, int which);
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int xor_get_group(magic_api * api, int which);
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int xor_get_order(int which);
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char *xor_get_description(magic_api * api, int which, int mode);
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void xor_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect);
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void xor_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void xor_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void xor_shutdown(magic_api * api);
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void xor_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 xor_requires_colors(magic_api * api, int which);
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void xor_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
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void xor_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
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int xor_modes(magic_api * api, int which);
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Uint8 xor_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 xor_default_size(magic_api * api, int which, int mode);
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void xor_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size,
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SDL_Rect * update_rect);
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Uint32 xor_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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int xor_init(magic_api *api, Uint8 disabled_features ATTRIBUTE_UNUSED, Uint8 complexity_level ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%ssounds/magic/xor.ogg", api->data_directory);
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xor_snd = Mix_LoadWAV(fname);
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return (1);
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}
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int xor_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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SDL_Surface *xor_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/xor.png", api->data_directory);
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return (IMG_Load(fname));
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}
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char *xor_get_name(magic_api *api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return (strdup(gettext("Xor Colors")));
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}
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int xor_get_group(magic_api *api ATTRIBUTE_UNUSED, 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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int xor_get_order(int which ATTRIBUTE_UNUSED)
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{
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return 800;
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}
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char *xor_get_description(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 (strdup(gettext("Click and drag to draw an \"Exclusive Or\" (XOR) effect")));
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else
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return (strdup(gettext("Click to apply an \"Exclusive Or\" (XOR) effect on the whole picture")));
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}
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static void do_xor(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface *canvas, 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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Uint8 r, g, b, xor;
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float hue, sat, val;
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Uint32 pixel;
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SDL_GetRGB(api->getpixel(canvas, x, y), canvas->format, &r, &g, &b);
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api->rgbtohsv(r, g, b, &hue, &sat, &val);
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if (sat == 0)
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xor = (2 * (int)hue + (x ^ y)) % 360;
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else
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xor = ((int)hue + (x ^ y)) % 360;
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api->hsvtorgb(xor, 1, 1, &r, &g, &b);
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pixel = SDL_MapRGB(canvas->format, r, g, b);
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api->putpixel(canvas, x, y, pixel);
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}
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static void do_xor_circle(void *ptr, int which ATTRIBUTE_UNUSED,
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SDL_Surface *canvas, 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 = -xor_radius; yy < xor_radius; yy++)
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{
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for (xx = -xor_radius; xx < xor_radius; xx++)
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{
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if (api->in_circle(xx, yy, xor_radius))
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{
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if (!api->touched(xx + x, yy + y))
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do_xor(api, which, canvas, last, x + xx, y + yy);
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}
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}
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}
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}
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void xor_drag(magic_api *api, int which, SDL_Surface *canvas,
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SDL_Surface *last ATTRIBUTE_UNUSED, int ox, int oy, int x, int y, SDL_Rect *update_rect)
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{
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api->line((void *)api, which, canvas, last, ox, oy, x, y, 1, do_xor_circle);
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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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update_rect->x = ox - xor_radius;
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update_rect->y = oy - xor_radius;
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update_rect->w = (x + xor_radius) - update_rect->x;
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update_rect->h = (y + xor_radius) - update_rect->y;
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api->playsound(xor_snd, (x * 255) / canvas->w, 255);
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}
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void xor_click(magic_api *api, int which, int mode,
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SDL_Surface *canvas, SDL_Surface *last ATTRIBUTE_UNUSED, int x, int y, SDL_Rect *update_rect)
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{
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if (mode == MODE_PAINT)
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xor_drag(api, which, canvas, last, x, y, x, y, update_rect);
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else
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{
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int xx, yy;
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for (yy = 0; yy < canvas->h; yy++)
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for (xx = 0; xx < canvas->w; xx++)
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do_xor(api, which, canvas, last, xx, yy);
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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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api->playsound(xor_snd, (x * 255) / canvas->w, 255);
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}
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}
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void xor_release(magic_api *api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface *canvas ATTRIBUTE_UNUSED,
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SDL_Surface *last ATTRIBUTE_UNUSED, int x ATTRIBUTE_UNUSED,
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int y ATTRIBUTE_UNUSED, SDL_Rect *update_rect ATTRIBUTE_UNUSED)
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{
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}
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void xor_shutdown(magic_api *api ATTRIBUTE_UNUSED)
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{
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if (xor_snd != NULL)
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Mix_FreeChunk(xor_snd);
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}
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void xor_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,
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Uint8 b ATTRIBUTE_UNUSED, SDL_Rect *update_rect ATTRIBUTE_UNUSED)
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{
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}
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int xor_requires_colors(magic_api *api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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void xor_switchin(magic_api *api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface *canvas ATTRIBUTE_UNUSED)
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{
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}
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void xor_switchout(magic_api *api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface *canvas ATTRIBUTE_UNUSED)
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{
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}
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int xor_modes(magic_api *api ATTRIBUTE_UNUSED, 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 xor_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 xor_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 xor_set_size(magic_api *api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface *canvas ATTRIBUTE_UNUSED, SDL_Surface *last ATTRIBUTE_UNUSED,
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Uint8 size ATTRIBUTE_UNUSED, SDL_Rect *update_rect ATTRIBUTE_UNUSED)
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{
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xor_radius = size * 4;
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}
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