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New "Spray Paint" magic tool

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Paints a spray of dots around the cursor, simulating paint
from a spray can, or an airbrush.
This commit is contained in:
Bill Kendrick 2024-10-02 22:39:10 -07:00
parent 2ae3c1da99
commit 0dd7d39676
136 changed files with 6910 additions and 5091 deletions
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264
magic/src/spraypaint.c Normal file
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/*
spraypaint.c
A spraypaint- / airbrush-like painting tool.
Tux Paint - A simple drawing program for children.
Copyright (c) 2024 by Bill Kendrick
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: October 2, 2024
*/
#include <stdio.h>
#include <string.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
static Mix_Chunk *spraypaint_snd_spray, *spraypaint_snd_shake;
static int spraypaint_radius = 16;
static Uint8 spraypaint_r, spraypaint_g, spraypaint_b;
static int spraypaint_cnt = 0;
Uint32 spraypaint_api_version(void);
int spraypaint_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
int spraypaint_get_tool_count(magic_api * api);
SDL_Surface *spraypaint_get_icon(magic_api * api, int which);
char *spraypaint_get_name(magic_api * api, int which);
int spraypaint_get_group(magic_api * api, int which);
int spraypaint_get_order(int which);
char *spraypaint_get_description(magic_api * api, int which, int mode);
void spraypaint_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 spraypaint_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void spraypaint_release(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
void spraypaint_shutdown(magic_api * api);
void spraypaint_set_color(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
int spraypaint_requires_colors(magic_api * api, int which);
void spraypaint_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
void spraypaint_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
int spraypaint_modes(magic_api * api, int which);
Uint8 spraypaint_accepted_sizes(magic_api * api, int which, int mode);
Uint8 spraypaint_default_size(magic_api * api, int which, int mode);
void spraypaint_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size,
SDL_Rect * update_rect);
Uint32 spraypaint_api_version(void)
{
return (TP_MAGIC_API_VERSION);
}
int spraypaint_init(magic_api * api, Uint8 disabled_features ATTRIBUTE_UNUSED, Uint8 complexity_level ATTRIBUTE_UNUSED)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%ssounds/magic/spraypaint-spray.ogg", api->data_directory);
spraypaint_snd_spray = Mix_LoadWAV(fname);
snprintf(fname, sizeof(fname), "%ssounds/magic/spraypaint-shake.ogg", api->data_directory);
spraypaint_snd_shake = Mix_LoadWAV(fname);
return (1);
}
int spraypaint_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return (1);
}
SDL_Surface *spraypaint_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%simages/magic/spraypaint.png", api->data_directory);
return (IMG_Load(fname));
}
char *spraypaint_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (strdup(gettext_noop("Spray Paint")));
}
int spraypaint_get_group(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return MAGIC_TYPE_PAINTING;
}
int spraypaint_get_order(int which ATTRIBUTE_UNUSED)
{
return 800;
}
char *spraypaint_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode)
{
return (strdup(gettext_noop("Click and drag to add a random spray of color onto your image.")));
}
static void do_spraypaint(magic_api * api, SDL_Surface * canvas, int x, int y, int max_intensity)
{
Uint8 r, g, b, intensity;
Uint32 pixel;
SDL_GetRGB(api->getpixel(canvas, x, y), canvas->format, &r, &g, &b);
intensity = (rand() % max_intensity) / 4;
r = (((spraypaint_r * intensity) + (r * (255 - intensity))) / 255);
g = (((spraypaint_g * intensity) + (g * (255 - intensity))) / 255);
b = (((spraypaint_b * intensity) + (b * (255 - intensity))) / 255);
pixel = SDL_MapRGB(canvas->format, r, g, b);
api->putpixel(canvas, x, y, pixel);
}
static void do_spraypaint_circle(void *ptr, int which ATTRIBUTE_UNUSED,
SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y)
{
magic_api *api = (magic_api *) ptr;
int xx, yy, dist;
int max_dist;
max_dist = sqrt((spraypaint_radius * spraypaint_radius) * 2);
for (yy = -spraypaint_radius; yy < spraypaint_radius; yy++)
{
for (xx = -spraypaint_radius; xx < spraypaint_radius; xx++)
{
dist = sqrt((xx * xx) + (yy * yy));
if (dist <= spraypaint_radius)
{
if ((rand() % (dist * 2 + 1)) == 0)
{
do_spraypaint(api, canvas, x + xx, y + yy, 256 - ((dist * 255) / max_dist));
}
}
}
}
spraypaint_cnt++;
}
void spraypaint_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last ATTRIBUTE_UNUSED, int ox, int oy, int x, int y, SDL_Rect * update_rect)
{
api->line((void *)api, which, canvas, last, ox, oy, x, y, (spraypaint_radius / 8) + 1, do_spraypaint_circle);
if (ox > x)
{
int tmp = ox;
ox = x;
x = tmp;
}
if (oy > y)
{
int tmp = oy;
oy = y;
y = tmp;
}
update_rect->x = ox - spraypaint_radius;
update_rect->y = oy - spraypaint_radius;
update_rect->w = (x + spraypaint_radius) - update_rect->x;
update_rect->h = (y + spraypaint_radius) - update_rect->y;
api->playsound(spraypaint_snd_spray, (x * 255) / canvas->w, 255);
}
void spraypaint_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y, SDL_Rect * update_rect)
{
spraypaint_drag(api, which, canvas, last, x, y, x, y, update_rect);
}
void spraypaint_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)
{
api->stopsound();
if (spraypaint_cnt >= 1000)
{
spraypaint_cnt = 0;
api->playsound(spraypaint_snd_shake, (x * 255) / canvas->w, 255);
}
}
void spraypaint_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
if (spraypaint_snd_spray != NULL)
Mix_FreeChunk(spraypaint_snd_spray);
if (spraypaint_snd_shake != NULL)
Mix_FreeChunk(spraypaint_snd_shake);
}
void spraypaint_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED,
SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 r, Uint8 g,
Uint8 b, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
spraypaint_r = r;
spraypaint_g = g;
spraypaint_b = b;
}
int spraypaint_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return 1;
}
void spraypaint_switchin(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
spraypaint_cnt = 0;
}
void spraypaint_switchout(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
int spraypaint_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return MODE_PAINT;
}
Uint8 spraypaint_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode)
{
return 12;
}
Uint8 spraypaint_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return 4;
}
void spraypaint_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 ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
spraypaint_radius = size * 8;
}