308 lines
9.4 KiB
C
308 lines
9.4 KiB
C
/*
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grass.c
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Grass Magic Tool Plugin
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Tux Paint - A simple drawing program for children.
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by Albert Cahalan <albert@users.sf.net>
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Copyright (c) 2002-2024 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: January 16, 2024
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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> /* for RAND_MAX */
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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 *grass_snd;
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static Uint8 grass_r, grass_g, grass_b;
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static SDL_Surface *img_grass;
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// Prototypes
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int grass_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
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Uint32 grass_api_version(void);
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int grass_get_tool_count(magic_api * api);
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SDL_Surface *grass_get_icon(magic_api * api, int which);
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char *grass_get_name(magic_api * api, int which);
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int grass_get_group(magic_api * api, int which);
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int grass_get_order(int which);
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char *grass_get_description(magic_api * api, int which, int mode);
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void grass_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 grass_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 grass_release(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void grass_shutdown(magic_api * api);
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void grass_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 grass_requires_colors(magic_api * api, int which);
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static void do_grass(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
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static int log2int(int x);
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void grass_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
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void grass_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
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int grass_modes(magic_api * api, int which);
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Uint8 grass_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 grass_default_size(magic_api * api, int which, int mode);
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void grass_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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// No setup required:
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int grass_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/grass.wav", api->data_directory);
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grass_snd = Mix_LoadWAV(fname);
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snprintf(fname, sizeof(fname), "%simages/magic/grass_data.png", api->data_directory);
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img_grass = IMG_Load(fname);
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return (1);
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}
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Uint32 grass_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 grass_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 *grass_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/grass.png", 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 *grass_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return (strdup(gettext_noop("Grass")));
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}
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// Return our groups:
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int grass_get_group(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_PAINTING;
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}
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// Return our orders:
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int grass_get_order(int which ATTRIBUTE_UNUSED)
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{
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return 1700;
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}
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// Return our descriptions, localized:
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char *grass_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return (strdup(gettext_noop("Click and drag to draw grass. Don’t forget the dirt!")));
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}
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// Affect the canvas on drag:
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void grass_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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{
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api->line((void *)api, which, canvas, last, ox, oy, x, y, 4, do_grass);
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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 - 64;
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update_rect->y = oy - 64;
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update_rect->w = 128;
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update_rect->h = 192;
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api->playsound(grass_snd, (x * 255) / canvas->w, (y * 255) / canvas->h);
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}
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// Affect the canvas on click:
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void grass_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
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{
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grass_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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void grass_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, 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 grass_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (grass_snd != NULL)
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Mix_FreeChunk(grass_snd);
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}
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// Record the color from Tux Paint:
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void grass_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 r, Uint8 g,
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Uint8 b, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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grass_r = r;
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grass_g = g;
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grass_b = b;
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}
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// Use colors:
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int grass_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return 1;
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}
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static void do_grass(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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// grass color: 82,180,17
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static int bucket;
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double tmp_red, tmp_green, tmp_blue;
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Uint8 r, g, b, a;
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SDL_Rect src, dest;
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if (!api->button_down())
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bucket = 0;
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bucket += (3.5 + (rand() / (double)RAND_MAX)) * 7.0;
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while (bucket >= 0)
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{
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int rank = log2int(((double)y / canvas->h) * (0.99 + (rand() / (double)RAND_MAX)) * 64);
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int ah = 1 << rank;
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bucket -= ah;
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src.x = (rand() % 4) * 64;
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src.y = ah;
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src.w = 64;
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src.h = ah;
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dest.x = x - 32;
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dest.y = y - 30 + (int)((rand() / (double)RAND_MAX) * 30);
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tmp_red = api->sRGB_to_linear(grass_r) * 2.0 + (rand() / (double)RAND_MAX);
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tmp_green = api->sRGB_to_linear(grass_g) * 2.0 + (rand() / (double)RAND_MAX);
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tmp_blue = api->sRGB_to_linear(grass_b) * 2.0 + api->sRGB_to_linear(17);
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for (yy = 0; yy < ah; yy++)
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{
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for (xx = 0; xx < 64; xx++)
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{
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double rd, gd, bd;
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SDL_GetRGBA(api->getpixel(img_grass, xx + src.x, yy + src.y), img_grass->format, &r, &g, &b, &a);
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rd = api->sRGB_to_linear(r) * 8.0 + tmp_red;
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rd = rd * (a / 255.0) / 11.0;
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gd = api->sRGB_to_linear(g) * 8.0 + tmp_green;
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gd = gd * (a / 255.0) / 11.0;
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bd = api->sRGB_to_linear(b) * 8.0 + tmp_blue;
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bd = bd * (a / 255.0) / 11.0;
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SDL_GetRGB(api->getpixel(canvas, xx + dest.x, yy + dest.y), canvas->format, &r, &g, &b);
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r = api->linear_to_sRGB(api->sRGB_to_linear(r) * (1.0 - a / 255.0) + rd);
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g = api->linear_to_sRGB(api->sRGB_to_linear(g) * (1.0 - a / 255.0) + gd);
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b = api->linear_to_sRGB(api->sRGB_to_linear(b) * (1.0 - a / 255.0) + bd);
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api->putpixel(canvas, xx + dest.x, yy + dest.y, SDL_MapRGB(canvas->format, r, g, b));
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}
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}
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}
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}
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// this one rounds down
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static int log2int(int x)
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{
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int y = 0;
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if (x <= 1)
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return 0;
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x >>= 1;
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while (x)
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{
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x >>= 1;
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y++;
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}
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return y;
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}
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void grass_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 grass_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 grass_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return (MODE_PAINT);
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}
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Uint8 grass_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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/* FIXME: Perhaps some day this could be for blade thickness, height, randomness, or something else...? -bjk 2023.04.18 */
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return 0;
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}
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Uint8 grass_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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void grass_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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}
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