source: toilet/trunk/src/filters.c @ 1142

Last change on this file since 1142 was 1142, checked in by Sam Hocevar, 15 years ago
  • Make the --metal filter only change the colour, not the characters.
  • Property svn:keywords set to Id
File size: 2.7 KB
Line 
1/*
2 *  TOIlet        The Other Implementation’s letters
3 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
4 *                All Rights Reserved
5 *
6 *  $Id: filters.c 1142 2006-09-30 10:48:32Z sam $
7 *
8 *  This program is free software; you can redistribute it and/or
9 *  modify it under the terms of the Do What The Fuck You Want To
10 *  Public License, Version 2, as published by Sam Hocevar. See
11 *  http://sam.zoy.org/wtfpl/COPYING for more details.
12 */
13
14/*
15 * This file contains post-processing filter functions.
16 */
17
18#include "config.h"
19
20#if defined(HAVE_INTTYPES_H)
21#   include <inttypes.h>
22#endif
23#include <cucul.h>
24
25#include "filters.h"
26
27void filter_autocrop(cucul_canvas_t *cv)
28{
29    unsigned int x, y, w, h;
30    unsigned int xmin, xmax, ymin, ymax;
31
32    xmin = w = cucul_get_canvas_width(cv);
33    xmax = 0;
34    ymin = h = cucul_get_canvas_height(cv);
35    ymax = 0;
36
37    for(y = 0; y < h; y++)
38        for(x = 0; x < w; x++)
39    {
40        unsigned long int ch = cucul_getchar(cv, x, y);
41        if(ch != (unsigned char)' ')
42        {
43            if(x < xmin)
44                xmin = x;
45            if(x > xmax)
46                xmax = x;
47            if(y < ymin)
48                ymin = y;
49            if(y > ymax)
50                ymax = y;
51        }
52    }
53
54    if(xmax < xmin || ymax < ymin)
55        return;
56
57    cucul_set_canvas_boundaries(cv, xmin, ymin,
58                                xmax - xmin + 1, ymax - ymin + 1);
59}
60
61void filter_metal(cucul_canvas_t *cv)
62{
63    static unsigned char const palette[] =
64    {
65        CUCUL_COLOR_LIGHTBLUE,
66        CUCUL_COLOR_BLUE,
67        CUCUL_COLOR_LIGHTGRAY,
68        CUCUL_COLOR_DARKGRAY,
69    };
70
71    unsigned int x, y, w, h;
72
73    w = cucul_get_canvas_width(cv);
74    h = cucul_get_canvas_height(cv);
75
76    for(y = 0; y < h; y++)
77        for(x = 0; x < w; x++)
78    {
79        unsigned long int ch = cucul_getchar(cv, x, y);
80        int i;
81
82        if(ch == (unsigned char)' ')
83            continue;
84
85        i = y * 4 / h;
86        cucul_set_color(cv, palette[i], CUCUL_COLOR_TRANSPARENT);
87        cucul_putchar(cv, x, y, ch);
88    }
89}
90
91void filter_gay(cucul_canvas_t *cv)
92{
93    static unsigned char const rainbow[] =
94    {
95        CUCUL_COLOR_LIGHTMAGENTA,
96        CUCUL_COLOR_LIGHTRED,
97        CUCUL_COLOR_YELLOW,
98        CUCUL_COLOR_LIGHTGREEN,
99        CUCUL_COLOR_LIGHTCYAN,
100        CUCUL_COLOR_LIGHTBLUE,
101    };
102    unsigned int x, y, w, h;
103
104    w = cucul_get_canvas_width(cv);
105    h = cucul_get_canvas_height(cv);
106
107    for(y = 0; y < h; y++)
108        for(x = 0; x < w; x++)
109    {
110        unsigned long int ch = cucul_getchar(cv, x, y);
111        if(ch != (unsigned char)' ')
112        {
113            cucul_set_color(cv, rainbow[(x / 2 + y) % 6],
114                                CUCUL_COLOR_TRANSPARENT);
115            cucul_putchar(cv, x, y, ch);
116        }
117    }
118}
119
Note: See TracBrowser for help on using the repository browser.