362 lines
9.9 KiB
C
362 lines
9.9 KiB
C
/*
|
|
blur.c
|
|
|
|
blur, Blur tool
|
|
Tux Paint - A simple drawing program for children.
|
|
|
|
Credits: Bill Kendrick<bill@newbreedsoftware.com> & Andrew Corcoran <akanewbie@gmail.com>
|
|
|
|
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: April 12, 2023
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <libintl.h>
|
|
#include "tp_magic_api.h"
|
|
#include "SDL_image.h"
|
|
#include "SDL_mixer.h"
|
|
#include <math.h>
|
|
#include <limits.h>
|
|
|
|
// Prototypes
|
|
Uint32 blur_api_version(void);
|
|
int blur_init(magic_api * api, Uint32 disabled_features);
|
|
int blur_get_tool_count(magic_api * api);
|
|
SDL_Surface *blur_get_icon(magic_api * api, int which);
|
|
char *blur_get_name(magic_api * api, int which);
|
|
int blur_get_group(magic_api * api, int which);
|
|
char *blur_get_description(magic_api * api, int which, int mode);
|
|
void blur_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 blur_click(magic_api * api, int which, int mode, SDL_Surface * canvas,
|
|
SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
|
|
void blur_release(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
|
|
void blur_shutdown(magic_api * api);
|
|
void blur_set_color(magic_api * api, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
|
|
void blur_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas,
|
|
SDL_Surface * last, Uint8 sz, SDL_Rect * update_rect);
|
|
int blur_requires_colors(magic_api * api, int which);
|
|
Uint8 blur_accepted_sizes(magic_api * api, int which, int mode);
|
|
Uint8 blur_default_size(magic_api * api, int which, int mode);
|
|
void blur_switchin(magic_api * api, int which, int mode,
|
|
SDL_Surface * canvas);
|
|
void blur_switchout(magic_api * api, int which, int mode,
|
|
SDL_Surface * canvas);
|
|
int blur_modes(magic_api * api, int which);
|
|
|
|
enum
|
|
{
|
|
TOOL_blur,
|
|
blur_NUM_TOOLS
|
|
};
|
|
|
|
static int blur_RADIUS = 16;
|
|
|
|
static Mix_Chunk *blur_snd_effect[blur_NUM_TOOLS];
|
|
|
|
const char *blur_snd_filenames[blur_NUM_TOOLS] = {
|
|
"blur.wav",
|
|
};
|
|
|
|
const char *blur_icon_filenames[blur_NUM_TOOLS] = {
|
|
"blur.png",
|
|
};
|
|
|
|
const char *blur_names[blur_NUM_TOOLS] = {
|
|
gettext_noop("Blur"),
|
|
};
|
|
|
|
const int blur_groups[blur_NUM_TOOLS] = {
|
|
MAGIC_TYPE_DISTORTS,
|
|
};
|
|
|
|
const char *blur_descs[blur_NUM_TOOLS][2] = {
|
|
{gettext_noop("Click and drag the mouse around to blur the image."),
|
|
gettext_noop("Click to blur the entire image.")},
|
|
};
|
|
|
|
Uint32 blur_api_version(void)
|
|
{
|
|
return (TP_MAGIC_API_VERSION);
|
|
}
|
|
|
|
//Load sounds
|
|
int blur_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
|
|
{
|
|
int i;
|
|
char fname[1024];
|
|
|
|
for (i = 0; i < blur_NUM_TOOLS; i++)
|
|
{
|
|
snprintf(fname, sizeof(fname), "%ssounds/magic/%s", api->data_directory,
|
|
blur_snd_filenames[i]);
|
|
blur_snd_effect[i] = Mix_LoadWAV(fname);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
int blur_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
|
|
{
|
|
return (blur_NUM_TOOLS);
|
|
}
|
|
|
|
// Load our icons:
|
|
SDL_Surface *blur_get_icon(magic_api * api, int which)
|
|
{
|
|
char fname[1024];
|
|
|
|
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory,
|
|
blur_icon_filenames[which]);
|
|
return (IMG_Load(fname));
|
|
}
|
|
|
|
// Return our names, localized:
|
|
char *blur_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
|
|
{
|
|
return (strdup(gettext_noop(blur_names[which])));
|
|
}
|
|
|
|
// Return our group
|
|
int blur_get_group(magic_api * api ATTRIBUTE_UNUSED, int which)
|
|
{
|
|
return blur_groups[which];
|
|
}
|
|
|
|
// Return our descriptions, localized:
|
|
char *blur_get_description(magic_api * api ATTRIBUTE_UNUSED, int which,
|
|
int mode)
|
|
{
|
|
return (strdup(gettext_noop(blur_descs[which][mode - 1])));
|
|
}
|
|
|
|
//Do the effect for one pixel
|
|
static void do_blur_pixel(void *ptr, int which ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas, SDL_Surface * last, int x,
|
|
int y)
|
|
{
|
|
magic_api *api = (magic_api *) ptr;
|
|
int i, j, k;
|
|
Uint8 temp[3];
|
|
double blurValue[3];
|
|
|
|
//5x5 gaussiann weighting window
|
|
const int weight[5][5] = { {1, 4, 7, 4, 1},
|
|
{4, 16, 26, 16, 4},
|
|
{7, 26, 41, 26, 7},
|
|
{4, 16, 26, 16, 4},
|
|
{1, 4, 7, 4, 1}
|
|
};
|
|
|
|
for (k = 0; k < 3; k++)
|
|
{
|
|
blurValue[k] = 0;
|
|
}
|
|
|
|
for (i = -2; i < 3; i++)
|
|
{
|
|
for (j = -2; j < 3; j++)
|
|
{
|
|
//Add the pixels around the current one wieghted
|
|
SDL_GetRGB(api->getpixel(last, x + i, y + j), last->format, &temp[0],
|
|
&temp[1], &temp[2]);
|
|
for (k = 0; k < 3; k++)
|
|
{
|
|
blurValue[k] += temp[k] * weight[i + 2][j + 2];
|
|
}
|
|
}
|
|
}
|
|
for (k = 0; k < 3; k++)
|
|
{
|
|
blurValue[k] /= 273;
|
|
}
|
|
api->putpixel(canvas, x, y,
|
|
SDL_MapRGB(canvas->format, blurValue[0], blurValue[1],
|
|
blurValue[2]));
|
|
}
|
|
|
|
// Do the effect for the full image
|
|
static void do_blur_full(void *ptr, SDL_Surface * canvas, SDL_Surface * last,
|
|
int which)
|
|
{
|
|
magic_api *api = (magic_api *) ptr;
|
|
int x, y;
|
|
|
|
for (y = 0; y < last->h; y++)
|
|
{
|
|
if (y % 10 == 0)
|
|
{
|
|
api->update_progress_bar();
|
|
}
|
|
|
|
for (x = 0; x < last->w; x++)
|
|
{
|
|
do_blur_pixel(api, which, canvas, last, x, y);
|
|
}
|
|
}
|
|
}
|
|
|
|
//do the effect for the brush
|
|
static void do_blur_brush(void *ptr, int which, SDL_Surface * canvas,
|
|
SDL_Surface * last, int x, int y)
|
|
{
|
|
int xx, yy;
|
|
magic_api *api = (magic_api *) ptr;
|
|
|
|
for (yy = y - blur_RADIUS; yy < y + blur_RADIUS; yy++)
|
|
{
|
|
for (xx = x - blur_RADIUS; xx < x + blur_RADIUS; xx++)
|
|
{
|
|
if (api->in_circle(xx - x, yy - y, blur_RADIUS)
|
|
&& !api->touched(xx, yy))
|
|
{
|
|
do_blur_pixel(api, which, canvas, last, xx, yy);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Affect the canvas on drag:
|
|
void blur_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_blur_brush);
|
|
|
|
api->playsound(blur_snd_effect[which], (x * 255) / canvas->w, 255);
|
|
|
|
if (ox > x)
|
|
{
|
|
int tmp = ox;
|
|
|
|
ox = x;
|
|
x = tmp;
|
|
}
|
|
if (oy > y)
|
|
{
|
|
int tmp = oy;
|
|
|
|
oy = y;
|
|
y = tmp;
|
|
}
|
|
|
|
update_rect->x = ox - blur_RADIUS;
|
|
update_rect->y = oy - blur_RADIUS;
|
|
update_rect->w = (x + blur_RADIUS) - update_rect->x;
|
|
update_rect->h = (y + blur_RADIUS) - update_rect->y;
|
|
}
|
|
|
|
// Affect the canvas on click:
|
|
void blur_click(magic_api * api, int which, int mode,
|
|
SDL_Surface * canvas, SDL_Surface * last, int x, int y,
|
|
SDL_Rect * update_rect)
|
|
{
|
|
if (mode == MODE_PAINT)
|
|
blur_drag(api, which, canvas, last, x, y, x, y, update_rect);
|
|
else
|
|
{
|
|
update_rect->x = 0;
|
|
update_rect->y = 0;
|
|
update_rect->w = canvas->w;
|
|
update_rect->h = canvas->h;
|
|
do_blur_full(api, canvas, last, which);
|
|
api->playsound(blur_snd_effect[which], 128, 255);
|
|
}
|
|
}
|
|
|
|
// Affect the canvas on release:
|
|
void blur_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)
|
|
{
|
|
}
|
|
|
|
// No setup happened:
|
|
void blur_shutdown(magic_api * api ATTRIBUTE_UNUSED)
|
|
{
|
|
//Clean up sounds
|
|
int i;
|
|
|
|
for (i = 0; i < blur_NUM_TOOLS; i++)
|
|
{
|
|
if (blur_snd_effect[i] != NULL)
|
|
{
|
|
Mix_FreeChunk(blur_snd_effect[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Record the color from Tux Paint:
|
|
void blur_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED,
|
|
SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
// Record the size from Tux Paint:
|
|
void blur_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 sz, SDL_Rect * update_rect ATTRIBUTE_UNUSED) {
|
|
blur_RADIUS = sz * 4;
|
|
}
|
|
|
|
// Use colors:
|
|
int blur_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
Uint8 blur_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode) {
|
|
if (mode == MODE_PAINT)
|
|
return 8;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
Uint8 blur_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) {
|
|
return 4;
|
|
}
|
|
|
|
void blur_switchin(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
void blur_switchout(magic_api * api ATTRIBUTE_UNUSED,
|
|
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
|
|
SDL_Surface * canvas ATTRIBUTE_UNUSED)
|
|
{
|
|
}
|
|
|
|
int blur_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
|
|
{
|
|
return (MODE_FULLSCREEN | MODE_PAINT);
|
|
}
|