292 lines
10 KiB
C
292 lines
10 KiB
C
/*
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smudge.c
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Magic Tool Plugin
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Tux Paint - A simple drawing program for children.
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Smudge by Albert Cahalan <albert@users.sf.net>
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Wet Paint addition by Bill Kendrick <bill@newbreedsoftware.com>
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Copyright (c) 2002-2023
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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: December 29, 2023
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FIXME: "Wet Paint" doesn't smudge enough -bjk 2023.04.23
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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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/* Our globals: */
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static Mix_Chunk *smudge_snd;
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static Uint8 smudge_r, smudge_g, smudge_b;
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static int smudge_radius = 16;
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int smudge_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
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Uint32 smudge_api_version(void);
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SDL_Surface *smudge_get_icon(magic_api * api, int which);
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char *smudge_get_name(magic_api * api, int which);
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int smudge_get_group(magic_api * api, int which);
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char *smudge_get_description(magic_api * api, int which, int mode);
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static void do_smudge(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
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void smudge_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 smudge_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 smudge_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 smudge_shutdown(magic_api * api);
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void smudge_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 smudge_requires_colors(magic_api * api, int which);
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void smudge_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
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void smudge_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
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int smudge_modes(magic_api * api, int which);
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int smudge_get_tool_count(magic_api * api);
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Uint8 smudge_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 smudge_default_size(magic_api * api, int which, int mode);
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void smudge_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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int smudge_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/smudge.wav", api->data_directory);
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smudge_snd = Mix_LoadWAV(fname);
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return (1);
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}
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Uint32 smudge_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 smudge_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return (2);
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}
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// Load our icons:
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SDL_Surface *smudge_get_icon(magic_api * api, int which)
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{
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char fname[1024];
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if (which == 0)
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snprintf(fname, sizeof(fname), "%simages/magic/smudge.png", api->data_directory);
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else /* if (which == 1) */
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snprintf(fname, sizeof(fname), "%simages/magic/wetpaint.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 *smudge_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
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{
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if (which == 0)
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return (strdup(gettext_noop("Smudge")));
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else /* if (which == 1) */
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return (strdup(gettext_noop("Wet Paint")));
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}
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// Return our groups
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int smudge_get_group(magic_api * api ATTRIBUTE_UNUSED, int which)
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{
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if (which == 0)
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return MAGIC_TYPE_DISTORTS; /* Smudge */
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else
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return MAGIC_TYPE_PAINTING; /* Wet Paint */
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}
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// Return our descriptions, localized:
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char *smudge_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode ATTRIBUTE_UNUSED)
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{
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if (which == 0)
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return (strdup(gettext_noop("Click and drag the mouse around to smudge the picture.")));
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else /* if (which == 1) */
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return (strdup(gettext_noop("Click and drag the mouse around to draw with wet, smudgy paint.")));
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}
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// Do the effect:
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static void do_smudge(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
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{
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magic_api *api = (magic_api *) ptr;
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static double state[256][256][3];
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unsigned i = (smudge_radius * 2) * (smudge_radius * 2);
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double rate = api->button_down()? 0.5 : 0.0;
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Uint8 r, g, b;
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int xx, yy, strength;
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if (which == 1)
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{
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/* Wet paint */
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for (yy = -(smudge_radius / 2); yy < (smudge_radius / 2); yy++)
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for (xx = -(smudge_radius / 2); xx < (smudge_radius / 2); xx++)
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if (api->in_circle(xx, yy, (smudge_radius / 2)))
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{
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SDL_GetRGB(api->getpixel(last, x + xx, y + yy), last->format, &r, &g, &b);
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strength = (abs(xx * yy) / (smudge_radius / 2)) + 1;
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api->putpixel(canvas, x + xx, y + yy, SDL_MapRGB(canvas->format,
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(smudge_r +
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r * strength) /
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(strength + 1),
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(smudge_g +
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g * strength) /
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(strength + 1), (smudge_b + b * strength) / (strength + 1)));
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}
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}
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while (i--)
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{
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int iy = i / (smudge_radius * 2);
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int ix = i % (smudge_radius * 2);
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int radius_check;
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radius_check = (smudge_radius * 75) / 10; /* For 16 radius, we'll use 120 */
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// is it not on the circle of radius sqrt(radius_check) at location (smudge_radius,smudge_radius)?
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if ((ix - smudge_radius) * (ix - smudge_radius) + (iy - smudge_radius) * (iy - smudge_radius) > radius_check)
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continue;
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// it is on the circle, so grab it
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SDL_GetRGB(api->getpixel(canvas, x + ix - smudge_radius, y + iy - smudge_radius), last->format, &r, &g, &b);
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state[ix][iy][0] = rate * state[ix][iy][0] + (1.0 - rate) * api->sRGB_to_linear(r);
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state[ix][iy][1] = rate * state[ix][iy][1] + (1.0 - rate) * api->sRGB_to_linear(g);
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state[ix][iy][2] = rate * state[ix][iy][2] + (1.0 - rate) * api->sRGB_to_linear(b);
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// opacity 100% --> new data not blended w/ existing data
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api->putpixel(canvas, x + ix - smudge_radius, y + iy - smudge_radius,
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SDL_MapRGB(canvas->format,
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api->linear_to_sRGB(state[ix][iy][0]),
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api->linear_to_sRGB(state[ix][iy][1]), api->linear_to_sRGB(state[ix][iy][2])));
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}
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}
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// Affect the canvas on drag:
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void smudge_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, 1, do_smudge);
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api->playsound(smudge_snd, (x * 255) / canvas->w, 255);
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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 - smudge_radius;
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update_rect->y = oy - smudge_radius;
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update_rect->w = (x + smudge_radius) - update_rect->x;
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update_rect->h = (y + smudge_radius) - update_rect->y;
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}
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// Affect the canvas on click:
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void smudge_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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smudge_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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// Affect the canvas on click:
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void smudge_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 smudge_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (smudge_snd != NULL)
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Mix_FreeChunk(smudge_snd);
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}
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// Record the color from Tux Paint:
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void smudge_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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smudge_r = r;
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smudge_g = g;
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smudge_b = b;
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}
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// Use colors:
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int smudge_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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if (which == 0)
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return 0;
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else /* if (which == 1) */
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return 1;
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}
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void smudge_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 smudge_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 smudge_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 smudge_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return 8;
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}
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Uint8 smudge_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 smudge_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, Uint8 size,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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smudge_radius = size * 4;
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}
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