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tuxpaint-pencil-sharpener/magic/src/rosette.c
Bill Kendrick 3b1c26c93d Update all other Magic tools' "set_color()" 
FIXME: This loses "ATTRIBUTE_UNUSED" where they existed, and also
all of the files committed here need that compiler hint added to
all of the new arguments ('canvas', 'last', etc.) since they
obviously don't use them either.
2023-01-25 02:15:19 -08:00

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/*
rosette.c
Rosette Magic Tools Plugin + Picasso Magic Tools Plugin
Tux Paint - A simple drawing program for children.
Credits: Adam 'foo-script' Rakowski <foo-script@o2.pl>
Copyright (c) 2002-2023 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 25, 2023
*/
// sound only plays on release
// also same sound for both tools
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
#include <math.h> //for sin, cos, ...
#define ROSETTE_R 8 //circle's diameter
static int xmid, ymid;
struct rosette_rgb
{
Uint8 r, g, b;
};
struct rosette_rgb rosette_colors;
Mix_Chunk *rosette_snd;
// Housekeeping functions
Uint32 rosette_api_version(void);
void rosette_set_color(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
int rosette_init(magic_api * api);
int rosette_get_tool_count(magic_api * api);
SDL_Surface *rosette_get_icon(magic_api * api, int which);
char *rosette_get_name(magic_api * api, int which);
int rosette_get_group(magic_api * api, int which);
char *rosette_get_description(magic_api * api, int which, int mode);
int rosette_requires_colors(magic_api * api, int which);
void rosette_release(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * snapshot, int x,
int y, SDL_Rect * update_rect);
void rosette_shutdown(magic_api * api);
void rosette_draw(void *ptr, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int x, int y);
void rosette_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int ox, int oy, int x, int y,
SDL_Rect * update_rect);
void rosette_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last, int x, int y,
SDL_Rect * update_rect);
void rosette_switchin(magic_api * api, int which, int mode,
SDL_Surface * canvas);
void rosette_switchout(magic_api * api, int which, int mode,
SDL_Surface * canvas);
int rosette_modes(magic_api * api, int which);
void rosette_circle(void *ptr, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int x, int y);
Uint32 rosette_api_version(void)
{
return (TP_MAGIC_API_VERSION);
}
void rosette_set_color(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect)
{
//get the colors from API and store it in structure
rosette_colors.r = r;
rosette_colors.g = g;
rosette_colors.b = b;
}
int rosette_init(magic_api * api)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%ssounds/magic/picasso.ogg",
api->data_directory);
rosette_snd = Mix_LoadWAV(fname);
return (1);
}
int rosette_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return 2;
}
SDL_Surface *rosette_get_icon(magic_api * api, int which)
{
char fname[1024];
if (!which)
snprintf(fname, sizeof(fname), "%simages/magic/rosette.png",
api->data_directory);
else
snprintf(fname, sizeof(fname), "%simages/magic/picasso.png",
api->data_directory);
return (IMG_Load(fname));
}
char *rosette_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
{
if (!which)
return strdup(gettext_noop("Rosette"));
else
return strdup(gettext_noop("Picasso"));
}
int rosette_get_group(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED)
{
return MAGIC_TYPE_PATTERN_PAINTING;
}
char *rosette_get_description(magic_api * api ATTRIBUTE_UNUSED, int which,
int mode ATTRIBUTE_UNUSED)
{
if (!which)
return strdup(gettext_noop("Click and start drawing your rosette.")); //just k'scope with 3 bits?
else
return strdup(gettext_noop("You can draw just like Picasso!")); //what is this actually doing?
}
int rosette_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED)
{
return 1;
}
void rosette_release(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED,
SDL_Surface * snapshot ATTRIBUTE_UNUSED,
int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED,
SDL_Rect * update_rect ATTRIBUTE_UNUSED)
{
}
void rosette_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
Mix_FreeChunk(rosette_snd);
}
// Interactivity functions
void rosette_circle(void *ptr, int which ATTRIBUTE_UNUSED,
SDL_Surface * canvas,
SDL_Surface * snapshot ATTRIBUTE_UNUSED, int x, int y)
{
magic_api *api = (magic_api *) ptr;
int xx, yy;
for (yy = y - ROSETTE_R; yy < y + ROSETTE_R; yy++)
for (xx = x - ROSETTE_R; xx < x + ROSETTE_R; xx++)
if (api->in_circle(xx - x, yy - y, ROSETTE_R / 2))
api->putpixel(canvas, xx, yy,
SDL_MapRGB(canvas->format, rosette_colors.r,
rosette_colors.g, rosette_colors.b));
}
void rosette_draw(void *ptr, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int x, int y)
{
magic_api *api = (magic_api *) ptr;
double angle;
double xx, yy; //distance to the center of the image
int x1, y1, x2, y2;
xx = (double) (xmid - x);
yy = (double) (y - ymid);
if (which == 0)
{
angle = 2 * M_PI / 3; //an angle between brushes
x1 = (int) (xx * cos(angle) - yy * sin(angle));
y1 = (int) (xx * sin(angle) + yy * cos(angle));
x2 = (int) (xx * cos(2 * angle) - yy * sin(2 * angle));
y2 = (int) (xx * sin(2 * angle) + yy * cos(2 * angle));
}
else
{
angle = atan(yy / xx);
if ((xx < 0) && (yy > 0))
angle += M_PI;
if ((xx < 0) && (yy < 0))
angle += M_PI;
if ((xx > 0) && (yy < 0))
angle += 2 * M_PI;
if ((y == ymid) && (xx < 0))
angle = M_PI;
x1 = (int) (xx * cos(2 * angle) - yy * sin(2 * angle));
y1 = (int) (xx * sin(2 * angle) - yy * cos(angle));
x2 = (int) (xx * cos(2 * angle) - yy * sin(2 * angle));
y2 = (int) (xx * sin(2 * angle) + yy * cos(2 * angle));
}
rosette_circle(api, which, canvas, snapshot, x, y);
rosette_circle(api, which, canvas, snapshot, (-1) * (x1 - xmid), y1 + ymid);
rosette_circle(api, which, canvas, snapshot, (-1) * (x2 - xmid), y2 + ymid);
}
void rosette_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * snapshot, int ox, int oy, int x, int y,
SDL_Rect * update_rect)
{
api->line((void *) api, which, canvas, snapshot, ox, oy, x, y, 1,
rosette_draw);
api->playsound(rosette_snd, (x * 255) / canvas->w, 255);
update_rect->x = update_rect->y = 0;
update_rect->w = canvas->w;
update_rect->h = canvas->h;
}
void rosette_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas, SDL_Surface * last, int x, int y,
SDL_Rect * update_rect)
{
rosette_drag(api, which, canvas, last, x, y, x, y, update_rect);
}
void rosette_switchin(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
xmid = canvas->w / 2;
ymid = canvas->h / 2;
}
void rosette_switchout(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
}
int rosette_modes(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT);
}
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