294 lines
8.7 KiB
C
294 lines
8.7 KiB
C
/*
|
|
light.c
|
|
|
|
Light Magic Tool Plugin
|
|
Tux Paint - A simple drawing program for children.
|
|
|
|
Copyright (c) 2002-2024 by Bill Kendrick and others; see AUTHORS.txt
|
|
bill@newbreedsoftware.com
|
|
https://tuxpaint.org/
|
|
|
|
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: January 16, 2024
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "tp_magic_api.h"
|
|
#include "SDL_image.h"
|
|
#include "SDL_mixer.h"
|
|
|
|
#include "math.h"
|
|
|
|
/* Our globals: */
|
|
|
|
static Mix_Chunk *light1_snd, *light2_snd;
|
|
static float light_h, light_s, light_v;
|
|
static int light_radius = 8;
|
|
|
|
/* Function prototypes: */
|
|
|
|
Uint32 light_api_version(void);
|
|
int light_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
|
|
int light_get_tool_count(magic_api * api);
|
|
SDL_Surface *light_get_icon(magic_api * api, int which);
|
|
char *light_get_name(magic_api * api, int which);
|
|
int light_get_group(magic_api * api, int which);
|
|
int light_get_order(int which);
|
|
char *light_get_description(magic_api * api, int which, int mode);
|
|
static void do_light(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
|
|
void light_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 light_click(magic_api * api, int which, int mode, SDL_Surface * canvas,
|
|
SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
|
|
void light_release(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
|
|
void light_shutdown(magic_api * api);
|
|
void light_set_color(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
|
|
int light_requires_colors(magic_api * api, int which);
|
|
void light_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
|
|
void light_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
|
|
int light_modes(magic_api * api, int which);
|
|
Uint8 light_accepted_sizes(magic_api * api, int which, int mode);
|
|
Uint8 light_default_size(magic_api * api, int which, int mode);
|
|
void light_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size,
|
|
SDL_Rect * update_rect);
|
|
|
|
|
|
Uint32 light_api_version(void)
|
|
{
|
|
return (TP_MAGIC_API_VERSION);
|
|
}
|
|
|
|
|
|
// No setup required:
|
|
int light_init(magic_api * api, Uint8 disabled_features ATTRIBUTE_UNUSED, Uint8 complexity_level ATTRIBUTE_UNUSED)
|
|
{
|
|
char fname[1024];
|
|
|
|
snprintf(fname, sizeof(fname), "%ssounds/magic/light1.ogg", api->data_directory);
|
|
light1_snd = Mix_LoadWAV(fname);
|
|
|
|
snprintf(fname, sizeof(fname), "%ssounds/magic/light2.ogg", api->data_directory);
|
|
light2_snd = Mix_LoadWAV(fname);
|
|
|
|
return (1);
|
|
}
|
|
|
|
// We have multiple tools:
|
|
int light_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
|
|
{
|
|
return (1);
|
|
}
|
|
|
|
// Load our icons:
|
|
SDL_Surface *light_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
char fname[1024];
|
|
|
|
snprintf(fname, sizeof(fname), "%simages/magic/light.png", api->data_directory);
|
|
|
|
return (IMG_Load(fname));
|
|
}
|
|
|
|
// Return our names, localized:
|
|
char *light_get_name(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return (strdup(gettext_noop("Light")));
|
|
}
|
|
|
|
// Return our groups:
|
|
int light_get_group(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return MAGIC_TYPE_PAINTING;
|
|
}
|
|
|
|
// Return our orders:
|
|
int light_get_order(int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return 2600;
|
|
}
|
|
|
|
// Return our descriptions, localized:
|
|
char *light_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
|
|
{
|
|
return (strdup(gettext_noop("Click and drag to draw a beam of light on your picture.")));
|
|
}
|
|
|
|
// Do the effect:
|
|
|
|
static void do_light(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;
|
|
Uint32 pix;
|
|
Uint8 r, g, b;
|
|
float h, s, v, new_h, new_s, new_v;
|
|
float adj;
|
|
|
|
for (yy = -light_radius; yy < light_radius; yy++)
|
|
{
|
|
for (xx = -light_radius; xx < light_radius; xx++)
|
|
{
|
|
if (api->in_circle(xx, yy, light_radius))
|
|
{
|
|
pix = api->getpixel(canvas, x + xx, y + yy);
|
|
|
|
SDL_GetRGB(pix, canvas->format, &r, &g, &b);
|
|
|
|
adj = sqrt(light_radius - sqrt((xx * xx) + (yy * yy))) / 64.0;
|
|
// adj = (((float)light_radius - 0.01) - sqrt(abs(xx * yy))) / (16.0 * (float)light_radius);
|
|
|
|
api->rgbtohsv(r, g, b, &h, &s, &v);
|
|
|
|
v = min((float)1.0, v + adj);
|
|
|
|
if (light_h == -1 && h == -1)
|
|
{
|
|
new_h = -1;
|
|
new_s = 0;
|
|
new_v = v;
|
|
}
|
|
else if (light_h == -1)
|
|
{
|
|
new_h = h;
|
|
new_s = max(0.0, s - adj / 2.0);
|
|
new_v = v;
|
|
}
|
|
else if (h == -1)
|
|
{
|
|
new_h = light_h;
|
|
new_s = max(0.0, light_s - adj / 2.0);
|
|
new_v = v;
|
|
}
|
|
else
|
|
{
|
|
new_h = (light_h + h) / 2;
|
|
new_s = max(0.0, s - adj / 2.0);
|
|
new_v = v;
|
|
}
|
|
|
|
api->hsvtorgb(new_h, new_s, new_v, &r, &g, &b);
|
|
|
|
api->putpixel(canvas, x + xx, y + yy, SDL_MapRGB(canvas->format, r, g, b));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Affect the canvas on drag:
|
|
void light_drag(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect)
|
|
{
|
|
api->line((void *)api, which, canvas, last, ox, oy, x, y, 1, do_light);
|
|
|
|
if (ox > x)
|
|
{
|
|
int tmp = ox;
|
|
|
|
ox = x;
|
|
x = tmp;
|
|
}
|
|
if (oy > y)
|
|
{
|
|
int tmp = oy;
|
|
|
|
oy = y;
|
|
y = tmp;
|
|
}
|
|
|
|
update_rect->x = ox - light_radius;
|
|
update_rect->y = oy - light_radius;
|
|
update_rect->w = (x + light_radius) - update_rect->x;
|
|
update_rect->h = (y + light_radius) - update_rect->y;
|
|
|
|
api->playsound(light1_snd, (x * 255) / canvas->w, 255);
|
|
}
|
|
|
|
// Affect the canvas on click:
|
|
void light_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
|
|
{
|
|
light_drag(api, which, canvas, last, x, y, x, y, update_rect);
|
|
}
|
|
|
|
// Affect the canvas on release:
|
|
void light_release(magic_api * api, int which ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED,
|
|
int x, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
|
|
{
|
|
api->playsound(light2_snd, (x * 255) / canvas->w, 255);
|
|
}
|
|
|
|
// No setup happened:
|
|
void light_shutdown(magic_api * api ATTRIBUTE_UNUSED)
|
|
{
|
|
if (light1_snd != NULL)
|
|
Mix_FreeChunk(light1_snd);
|
|
if (light2_snd != NULL)
|
|
Mix_FreeChunk(light2_snd);
|
|
}
|
|
|
|
// Record the color from Tux Paint:
|
|
void light_set_color(magic_api * api, 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)
|
|
{
|
|
api->rgbtohsv(r, g, b, &light_h, &light_s, &light_v);
|
|
}
|
|
|
|
// Use colors:
|
|
int light_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void light_switchin(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
void light_switchout(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
int light_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return (MODE_PAINT);
|
|
}
|
|
|
|
|
|
Uint8 light_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
|
|
{
|
|
return 4;
|
|
}
|
|
|
|
Uint8 light_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
|
|
{
|
|
return 2;
|
|
}
|
|
|
|
void light_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)
|
|
{
|
|
light_radius = size * 4;
|
|
}
|