toilet/src/filter.c
2006-10-24 12:39:57 +00:00

119 lines
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C
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/*
* TOIlet The Other Implementations letters
* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Do What The Fuck You Want To
* Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
/*
* This file contains post-processing filter functions.
*/
#include "config.h"
#if defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#include <cucul.h>
#include "filter.h"
void filter_autocrop(cucul_canvas_t *cv)
{
unsigned int x, y, w, h;
unsigned int xmin, xmax, ymin, ymax;
xmin = w = cucul_get_canvas_width(cv);
xmax = 0;
ymin = h = cucul_get_canvas_height(cv);
ymax = 0;
for(y = 0; y < h; y++)
for(x = 0; x < w; x++)
{
unsigned long int ch = cucul_getchar(cv, x, y);
if(ch != (unsigned char)' ')
{
if(x < xmin)
xmin = x;
if(x > xmax)
xmax = x;
if(y < ymin)
ymin = y;
if(y > ymax)
ymax = y;
}
}
if(xmax < xmin || ymax < ymin)
return;
cucul_set_canvas_boundaries(cv, xmin, ymin,
xmax - xmin + 1, ymax - ymin + 1);
}
void filter_metal(cucul_canvas_t *cv)
{
static unsigned char const palette[] =
{
CUCUL_COLOR_LIGHTBLUE,
CUCUL_COLOR_BLUE,
CUCUL_COLOR_LIGHTGRAY,
CUCUL_COLOR_DARKGRAY,
};
unsigned int x, y, w, h;
w = cucul_get_canvas_width(cv);
h = cucul_get_canvas_height(cv);
for(y = 0; y < h; y++)
for(x = 0; x < w; x++)
{
unsigned long int ch = cucul_getchar(cv, x, y);
int i;
if(ch == (unsigned char)' ')
continue;
i = y * 4 / h;
cucul_set_color(cv, palette[i], CUCUL_COLOR_TRANSPARENT);
cucul_putchar(cv, x, y, ch);
}
}
void filter_gay(cucul_canvas_t *cv)
{
static unsigned char const rainbow[] =
{
CUCUL_COLOR_LIGHTMAGENTA,
CUCUL_COLOR_LIGHTRED,
CUCUL_COLOR_YELLOW,
CUCUL_COLOR_LIGHTGREEN,
CUCUL_COLOR_LIGHTCYAN,
CUCUL_COLOR_LIGHTBLUE,
};
unsigned int x, y, w, h;
w = cucul_get_canvas_width(cv);
h = cucul_get_canvas_height(cv);
for(y = 0; y < h; y++)
for(x = 0; x < w; x++)
{
unsigned long int ch = cucul_getchar(cv, x, y);
if(ch != (unsigned char)' ')
{
cucul_set_color(cv, rainbow[(x / 2 + y) % 6],
CUCUL_COLOR_TRANSPARENT);
cucul_putchar(cv, x, y, ch);
}
}
}