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tuxpaint-pencil-sharpener/magic/src/mosaic.c
Bill Kendrick 0532b35f31 Gave ordering to all Distorts magic tools
2024-01-16 21:31:07 -08:00

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/*
mosaic.c
mosaic, Add a mosaic effect to the image using a combination of other tools.
Requires the mosaicAll sharpen and noise tools.
Tux Paint - A simple drawing program for children.
Credits: Andrew Corcoran <akanewbie@gmail.com>
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 <libintl.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "SDL_mixer.h"
#include <math.h>
#include <limits.h>
#include <time.h>
#ifndef gettext_noop
#define gettext_noop(String) String
#endif
static void mosaic_noise_pixel(void *ptr, SDL_Surface * canvas, int noise_AMOUNT, int x, int y);
static void mosaic_blur_pixel(void *ptr, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
static void mosaic_sharpen_pixel(void *ptr, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
static void reset_mosaic_blured(SDL_Surface * canvas);
/* Prototypes */
Uint32 mosaic_api_version(void);
int mosaic_init(magic_api * api, Uint8 disabled_features, Uint8 complexity_level);
int mosaic_get_tool_count(magic_api *);
SDL_Surface *mosaic_get_icon(magic_api *, int);
char *mosaic_get_name(magic_api *, int);
int mosaic_get_group(magic_api *, int);
int mosaic_get_order(int);
char *mosaic_get_description(magic_api *, int, int);
void mosaic_paint(void *, int, SDL_Surface *, SDL_Surface *, int, int);
void mosaic_drag(magic_api *, int, SDL_Surface *, SDL_Surface *, int, int, int, int, SDL_Rect *);
void mosaic_click(magic_api *, int, int, SDL_Surface *, SDL_Surface *, int, int, SDL_Rect *);
void mosaic_release(magic_api *, int, SDL_Surface *, SDL_Surface *, int, int, SDL_Rect *);
void mosaic_shutdown(magic_api *);
void mosaic_set_color(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
int mosaic_requires_colors(magic_api *, int);
void mosaic_switchin(magic_api *, int, int, SDL_Surface *);
void mosaic_switchout(magic_api *, int, int, SDL_Surface *);
int mosaic_modes(magic_api *, int);
Uint8 mosaic_accepted_sizes(magic_api * api, int which, int mode);
Uint8 mosaic_default_size(magic_api * api, int which, int mode);
void mosaic_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size,
SDL_Rect * update_rect);
static const int mosaic_AMOUNT = 300;
static int mosaic_RADIUS = 16;
static const double mosaic_SHARPEN = 1.0;
static int randnoise ATTRIBUTE_UNUSED;
Uint8 *mosaic_blured;
enum
{
TOOL_MOSAIC,
mosaic_NUM_TOOLS
};
static Mix_Chunk *mosaic_snd_effect[mosaic_NUM_TOOLS];
static SDL_Surface *canvas_noise;
static SDL_Surface *canvas_blur;
static SDL_Surface *canvas_sharp;
const char *mosaic_snd_filenames[mosaic_NUM_TOOLS] = {
"mosaic.ogg", /* FIXME */
};
const char *mosaic_icon_filenames[mosaic_NUM_TOOLS] = {
"mosaic.png",
};
const char *mosaic_names[mosaic_NUM_TOOLS] = {
gettext_noop("Mosaic"),
};
const int mosaic_groups[mosaic_NUM_TOOLS] = {
MAGIC_TYPE_DISTORTS,
};
const int mosaic_orders[mosaic_NUM_TOOLS] = {
1100,
};
const char *mosaic_descs[mosaic_NUM_TOOLS][2] = {
{gettext_noop("Click and drag the mouse to add a mosaic effect to parts of your picture."),
gettext_noop("Click to add a mosaic effect to your entire picture."),},
};
Uint32 mosaic_api_version(void)
{
return (TP_MAGIC_API_VERSION);
}
//Load sounds
int mosaic_init(magic_api * api, Uint8 disabled_features ATTRIBUTE_UNUSED, Uint8 complexity_level ATTRIBUTE_UNUSED)
{
int i;
char fname[1024];
for (i = 0; i < mosaic_NUM_TOOLS; i++)
{
snprintf(fname, sizeof(fname), "%ssounds/magic/%s", api->data_directory, mosaic_snd_filenames[i]);
mosaic_snd_effect[i] = Mix_LoadWAV(fname);
}
return (1);
}
int mosaic_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
{
return (mosaic_NUM_TOOLS);
}
// Load our icons:
SDL_Surface *mosaic_get_icon(magic_api * api, int which)
{
char fname[1024];
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, mosaic_icon_filenames[which]);
return (IMG_Load(fname));
}
// Return our names, localized:
char *mosaic_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
{
return (strdup(gettext_noop(mosaic_names[which])));
}
// Return our groups:
int mosaic_get_group(magic_api * api ATTRIBUTE_UNUSED, int which)
{
return mosaic_groups[which];
}
// Return our orders:
int mosaic_get_order(int which)
{
return mosaic_orders[which];
}
// Return our descriptions, localized:
char *mosaic_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode)
{
return (strdup(gettext_noop(mosaic_descs[which][mode - 1])));
}
//Calculates the grey scale value for a rgb pixel
static int mosaic_grey(Uint8 r1, Uint8 g1, Uint8 b1)
{
return 0.3 * r1 + .59 * g1 + 0.11 * b1;
}
// Do the effect for the full image
static void do_mosaic_full(void *ptr, SDL_Surface * canvas,
SDL_Surface * last ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
magic_api *api = (magic_api *) ptr;
int x, y;
Uint32 amask = ~(canvas->format->Rmask | canvas->format->Gmask | canvas->format->Bmask);
SDL_Surface *mosaic_temp = SDL_CreateRGBSurface(SDL_SWSURFACE,
canvas->w,
canvas->h,
canvas->format->BitsPerPixel,
canvas->format->Rmask,
canvas->format->Gmask,
canvas->format->Bmask,
amask);
api->update_progress_bar();
for (y = 0; y < canvas->h; y++)
{
for (x = 0; x < canvas->w; x++)
{
mosaic_blur_pixel(api, mosaic_temp, canvas_noise, x, y);
}
}
api->update_progress_bar();
for (y = 0; y < canvas->h; y++)
{
for (x = 0; x < canvas->w; x++)
{
mosaic_sharpen_pixel(api, canvas, mosaic_temp, x, y);
}
}
SDL_FreeSurface(mosaic_temp);
}
/* Paint the brush, noise is yet done at switchin,
blurs 2 pixels around the brush in order to get sharpen well done.*/
void mosaic_paint(void *ptr_to_api, int which ATTRIBUTE_UNUSED,
SDL_Surface * canvas, SDL_Surface * last ATTRIBUTE_UNUSED, int x, int y)
{
int i, j, pix_row_pos;
magic_api *api = (magic_api *) ptr_to_api;
for (j = max(0, y - mosaic_RADIUS - 2); j < min(canvas->h, y + mosaic_RADIUS + 2); j++)
{
pix_row_pos = j * canvas->w;
for (i = max(0, x - mosaic_RADIUS - 2); i < min(canvas->w, x + mosaic_RADIUS + 2); i++)
if (!mosaic_blured[pix_row_pos + i] && api->in_circle(i - x, j - y, mosaic_RADIUS + 2))
{
mosaic_blur_pixel(api, canvas_blur, canvas_noise, i, j);
mosaic_blured[pix_row_pos + i] = 1; /* Track what are yet blured */
}
}
for (i = x - mosaic_RADIUS; i < x + mosaic_RADIUS; i++)
for (j = y - mosaic_RADIUS; j < y + mosaic_RADIUS; j++)
if (api->in_circle(i - x, j - y, mosaic_RADIUS))
if (!api->touched(i, j))
{
mosaic_sharpen_pixel(api, canvas_sharp, canvas_blur, i, j);
api->putpixel(canvas, i, j, api->getpixel(canvas_sharp, i, j));
}
}
// Affect the canvas on drag:
void mosaic_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(api, which, canvas, last, ox, oy, x, y, 1, mosaic_paint);
update_rect->x = min(ox, x) - mosaic_RADIUS;
update_rect->y = min(oy, y) - mosaic_RADIUS;
update_rect->w = max(ox, x) + mosaic_RADIUS - update_rect->x;
update_rect->h = max(oy, y) + mosaic_RADIUS - update_rect->y;
api->playsound(mosaic_snd_effect[which], (x * 255) / canvas->w, 255);
}
// Affect the canvas on click:
void mosaic_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_FULLSCREEN)
{
update_rect->x = 0;
update_rect->y = 0;
update_rect->w = canvas->w;
update_rect->h = canvas->h;
do_mosaic_full(api, canvas_noise, last, which);
SDL_BlitSurface(canvas_noise, NULL, canvas, NULL);
api->playsound(mosaic_snd_effect[which], 128, 255);
}
else
mosaic_drag(api, which, canvas, last, x, y, x, y, update_rect);
}
// Affect the canvas on release:
void mosaic_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 mosaic_shutdown(magic_api * api ATTRIBUTE_UNUSED)
{
//Clean up sounds
int i;
for (i = 0; i < mosaic_NUM_TOOLS; i++)
{
if (mosaic_snd_effect[i] != NULL)
{
Mix_FreeChunk(mosaic_snd_effect[i]);
}
}
}
// Record the color from Tux Paint:
void mosaic_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)
{
}
// Use colors:
int mosaic_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return 0;
}
//Add noise to a pixel
static void mosaic_noise_pixel(void *ptr, SDL_Surface * canvas, int noise_AMOUNT, int x, int y)
{
magic_api *api = (magic_api *) ptr;
Uint8 temp[3];
double temp2[3];
int k;
SDL_GetRGB(api->getpixel(canvas, x, y), canvas->format, &temp[0], &temp[1], &temp[2]);
for (k = 0; k < 3; k++)
{
temp2[k] = clamp(0.0, (int)temp[k] - (rand() % noise_AMOUNT) + noise_AMOUNT / 2.0, 255.0);
}
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, temp2[0], temp2[1], temp2[2]));
}
//Blur a pixel
static void mosaic_blur_pixel(void *ptr, 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]));
}
//Sharpen a pixel
static void mosaic_sharpen_pixel(void *ptr, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
magic_api *api = (magic_api *) ptr;
Uint8 r1, g1, b1;
int grey;
int i, j;
double sobel_1 = 0, sobel_2 = 0;
double temp;
//Sobel weighting masks
const int sobel_weights_1[3][3] = { {1, 2, 1},
{0, 0, 0},
{-1, -2, -1}
};
const int sobel_weights_2[3][3] = { {-1, 0, 1},
{-2, 0, 2},
{-1, 0, 1}
};
sobel_1 = 0;
sobel_2 = 0;
for (i = -1; i < 2; i++)
{
for (j = -1; j < 2; j++)
{
//No need to check if inside canvas, getpixel does it for us.
SDL_GetRGB(api->getpixel(last, x + i, y + j), last->format, &r1, &g1, &b1);
grey = mosaic_grey(r1, g1, b1);
sobel_1 += grey * sobel_weights_1[i + 1][j + 1];
sobel_2 += grey * sobel_weights_2[i + 1][j + 1];
}
}
temp = sqrt(sobel_1 * sobel_1 + sobel_2 * sobel_2);
temp = (temp / 1443) * 255.0;
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
api->putpixel(canvas, x, y,
SDL_MapRGB(canvas->format,
clamp(0.0, r1 + mosaic_SHARPEN * temp, 255.0),
clamp(0.0, g1 + mosaic_SHARPEN * temp, 255.0),
clamp(0.0, b1 + mosaic_SHARPEN * temp, 255.0)));
}
void mosaic_switchin(magic_api * api, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas)
{
int y, x;
Uint32 amask;
mosaic_blured = (Uint8 *) malloc(sizeof(Uint8) * (canvas->w * canvas->h));
if (mosaic_blured == NULL)
{
fprintf(stderr, "\nError: Can't build drawing touch mask!\n");
exit(1);
}
amask = ~(canvas->format->Rmask | canvas->format->Gmask | canvas->format->Bmask);
canvas_noise = SDL_CreateRGBSurface(SDL_SWSURFACE,
canvas->w,
canvas->h,
canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask, amask);
SDL_BlitSurface(canvas, NULL, canvas_noise, NULL);
for (y = 0; y < canvas->h; y++)
{
for (x = 0; x < canvas->w; x++)
{
mosaic_noise_pixel(api, canvas_noise, mosaic_AMOUNT, x, y);
}
}
canvas_blur = SDL_CreateRGBSurface(SDL_SWSURFACE,
canvas->w,
canvas->h,
canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask, amask);
canvas_sharp = SDL_CreateRGBSurface(SDL_SWSURFACE,
canvas->w,
canvas->h,
canvas->format->BitsPerPixel,
canvas->format->Rmask, canvas->format->Gmask, canvas->format->Bmask, amask);
reset_mosaic_blured(canvas);
}
void mosaic_switchout(magic_api * api ATTRIBUTE_UNUSED,
int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
{
SDL_FreeSurface(canvas_noise);
SDL_FreeSurface(canvas_blur);
SDL_FreeSurface(canvas_sharp);
free(mosaic_blured);
}
int mosaic_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT | MODE_FULLSCREEN);
}
void reset_mosaic_blured(SDL_Surface * canvas)
{
int i, j;
for (j = 0; j < canvas->h; j++)
for (i = 0; i < canvas->w; i++)
mosaic_blured[j * canvas->w + i] = 0;
}
Uint8 mosaic_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode)
{
if (mode == MODE_PAINT)
return 8;
else
return 0;
}
Uint8 mosaic_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
{
return 4;
}
void mosaic_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)
{
mosaic_RADIUS = size * 4;
}
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