source: libcaca/trunk/test/gamma.c @ 1330

Last change on this file since 1330 was 1330, checked in by Sam Hocevar, 14 years ago
  • Switch back to UTF-32 arguments for drawing primitives, now that we properly export cucul_utf8_to_utf32(). Evil API breakage, but no one uses these functions anyway.
  • Property svn:keywords set to Id
File size: 3.8 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 1330 2006-11-11 08:11:26Z 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#include "common.h"
16
17#if !defined(__KERNEL__)
18#   if defined(HAVE_INTTYPES_H)
19#      include <inttypes.h>
20#   endif
21#   include <stdio.h>
22#   include <math.h>
23#endif
24
25#include "cucul.h"
26#include "caca.h"
27
28uint32_t buffer[256 * 4];
29
30int main(int argc, char *argv[])
31{
32    caca_event_t ev;
33    cucul_canvas_t *cv, *cw, *mask;
34    caca_display_t *dp;
35    cucul_dither_t *left, *right;
36    float gam = 1.0;
37    int x;
38
39    cv = cucul_create_canvas(0, 0);
40    dp = caca_create_display(cv);
41
42    cw = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
43    mask = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
44
45    for(x = 0; x < 256; x++)
46    {
47        buffer[x] = (x << 16) | (x << 8) | (x<< 0);
48        buffer[x + 256] = (0xff << 16) |    (x << 8) | (0x00 << 0);
49        buffer[x + 512] = (0x00 << 16) | (0xff << 8) |    (x << 0);
50        buffer[x + 768] =    (x << 16) | (0x00 << 8) | (0xff << 0);
51    }
52
53    left = cucul_create_dither(32, 256, 4, 4 * 256,
54                               0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
55    right = cucul_create_dither(32, 256, 4, 4 * 256,
56                                0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
57    caca_set_display_time(dp, 20000);
58
59    for(x = 0; ; x++)
60    {
61        int ret = caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0);
62
63        if(ret)
64        {
65            if(ev.data.key.ch == CACA_KEY_LEFT)
66                gam /= 1.03;
67            else if(ev.data.key.ch == CACA_KEY_RIGHT)
68                gam *= 1.03;
69            else if(ev.data.key.ch == CACA_KEY_DOWN)
70                gam = 1.0;
71            else if(ev.data.key.ch == CACA_KEY_ESCAPE)
72                break;
73        }
74
75        /* Resize the spare canvas, just in case the main one changed */
76        cucul_set_canvas_size(cw, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
77        cucul_set_canvas_size(mask, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
78
79        /* Draw the regular dither on the main canvas */
80        cucul_dither_bitmap(cv, 0, 0, cucul_get_canvas_width(cv),
81                            cucul_get_canvas_height(cv), left, buffer);
82
83        /* Draw the gamma-modified dither on the spare canvas */
84        cucul_set_dither_gamma(right, gam);
85        cucul_dither_bitmap(cw, 0, 0, cucul_get_canvas_width(cw),
86                            cucul_get_canvas_height(cw), right, buffer);
87
88        /* Draw something on the mask */
89        cucul_set_color_ansi(mask, CUCUL_LIGHTGRAY, CUCUL_BLACK);
90        cucul_clear_canvas(mask);
91        cucul_set_color_ansi(mask, CUCUL_WHITE, CUCUL_WHITE);
92        cucul_fill_ellipse(mask, (1.0 + sin(0.05 * (float)x))
93                                   * 0.5 * cucul_get_canvas_width(mask),
94                                 (1.0 + cos(0.05 * (float)x))
95                                   * 0.5 * cucul_get_canvas_height(mask),
96                                 cucul_get_canvas_width(mask) / 2,
97                                 cucul_get_canvas_height(mask) / 2, '#');
98
99        /* Blit the spare canvas onto the first one */
100        cucul_blit(cv, 0, 0, cw, mask);
101
102        cucul_set_color_ansi(cv, CUCUL_WHITE, CUCUL_BLUE);
103        cucul_printf(cv, 2, 1,
104                     "gamma=%g - use arrows to change, Esc to quit", gam);
105
106        caca_refresh_display(dp);
107    }
108
109    cucul_free_dither(left);
110    cucul_free_dither(right);
111
112    caca_free_display(dp);
113    cucul_free_canvas(cv);
114
115    return 0;
116}
117
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