source: libcaca/trunk/test/gamma.c @ 677

Last change on this file since 677 was 677, checked in by Sam Hocevar, 15 years ago
  • Renamed cucul_init()/cucul_end() into cucul_create()/cucul_free().
  • Property svn:keywords set to Id
File size: 3.6 KB
Line 
1/*
2 *  gamma         libcucul gamma test program
3 *  Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
4 *                All Rights Reserved
5 *
6 *  $Id: gamma.c 677 2006-03-23 13:12:56Z 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#include "config.h"
15
16#if defined(HAVE_INTTYPES_H)
17#   include <inttypes.h>
18#else
19typedef unsigned char uint8_t;
20typedef unsigned short uint16_t;
21typedef unsigned int uint32_t;
22#endif
23
24#if !defined(__KERNEL__)
25#   include <stdio.h>
26#   include <math.h>
27#endif
28
29#include "cucul.h"
30#include "caca.h"
31
32uint32_t buffer[256 * 4];
33
34int main(void)
35{
36    cucul_t *qq, *gg, *mask;
37    caca_t *kk;
38    struct cucul_bitmap *left, *right;
39    float gam = 1.0;
40    int x;
41
42    qq = cucul_create(0, 0);
43    kk = caca_attach(qq);
44
45    gg = cucul_create(cucul_get_width(qq), cucul_get_height(qq));
46    mask = cucul_create(cucul_get_width(qq), cucul_get_height(qq));
47
48    for(x = 0; x < 256; x++)
49    {
50        buffer[x] = (x << 16) | (x << 8) | (x<< 0);
51        buffer[x + 256] = (0xff << 16) |    (x << 8) | (0x00 << 0);
52        buffer[x + 512] = (0x00 << 16) | (0xff << 8) |    (x << 0);
53        buffer[x + 768] =    (x << 16) | (0x00 << 8) | (0xff << 0);
54    }
55
56    left = cucul_create_bitmap(32, 256, 4, 4 * 256,
57                               0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
58    right = cucul_create_bitmap(32, 256, 4, 4 * 256,
59                                0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
60    caca_set_delay(kk, 20000);
61
62    for(x = 0; ; x++)
63    {
64        int ev = caca_get_event(kk, CACA_EVENT_KEY_PRESS);
65
66        if(ev == (CACA_EVENT_KEY_PRESS | CACA_KEY_LEFT))
67            gam /= 1.03;
68        else if(ev == (CACA_EVENT_KEY_PRESS | CACA_KEY_RIGHT))
69            gam *= 1.03;
70        else if(ev == (CACA_EVENT_KEY_PRESS | CACA_KEY_DOWN))
71            gam = 1.0;
72        else if(ev == (CACA_EVENT_KEY_PRESS | CACA_KEY_ESCAPE))
73            break;
74
75        /* Resize the spare canvas, just in case the main one changed */
76        cucul_set_size(gg, cucul_get_width(qq), cucul_get_height(qq));
77        cucul_set_size(mask, cucul_get_width(qq), cucul_get_height(qq));
78
79        /* Draw the regular bitmap on the main canvas */
80        cucul_draw_bitmap(qq, 0, 0,
81                          cucul_get_width(qq) - 1, cucul_get_height(qq) - 1,
82                          left, buffer);
83
84        /* Draw the gamma-modified bitmap on the spare canvas */
85        cucul_set_bitmap_gamma(right, gam);
86        cucul_draw_bitmap(gg, 0, 0,
87                          cucul_get_width(gg) - 1, cucul_get_height(gg) - 1,
88                          right, buffer);
89
90        /* Draw something on the mask */
91        cucul_clear(mask);
92        cucul_set_color(mask, CUCUL_COLOR_WHITE, CUCUL_COLOR_WHITE);
93        cucul_fill_ellipse(mask, (1.0 + sin(0.05 * (float)x))
94                                   * 0.5 * cucul_get_width(mask),
95                                 (1.0 + cos(0.05 * (float)x))
96                                   * 0.5 * cucul_get_height(mask),
97                                 cucul_get_width(mask) / 2,
98                                 cucul_get_height(mask) / 2, '#');
99
100        /* Blit the spare canvas onto the first one */
101        cucul_blit(qq, 0, 0, gg, mask);
102
103        cucul_set_color(qq, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
104        cucul_printf(qq, 2, 1,
105                     "gamma=%g - use arrows to change, Esc to quit", gam);
106
107        caca_display(kk);
108    }
109
110    cucul_free_bitmap(left);
111    cucul_free_bitmap(right);
112
113    caca_detach(kk);
114    cucul_free(qq);
115
116    return 0;
117}
118
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