source: libcaca/trunk/src/box.c @ 246

Last change on this file since 246 was 246, checked in by Sam Hocevar, 19 years ago
  • src/graphics.c: + Internally cache screen width and height.
  • src/bitmap.c: + Added alpha support to caca_draw_bitmap(). For now, we only treat 0%

alpha as fully transparent, and any other value as fully opaque.

+ Slightly tuned colour weights in the renderer.
+ caca_set_bitmap_palette() takes unsigned ints.

  • examples/demo.c: + Added a crap render demo.
  • examples/aafire.c: + Set a 20ms delay. + Added alpha values to the palette.
  • examples/view.c: + Draw a gray checkered grid below the image so that transparent images

look a lot nicer.

+ 'f' toggles "fullscreen" mode.

  • Property svn:keywords set to Id
File size: 3.1 KB
Line 
1/*
2 *   libcaca       ASCII-Art library
3 *   Copyright (c) 2002, 2003 Sam Hocevar <sam@zoy.org>
4 *                 All Rights Reserved
5 *
6 *   This library is free software; you can redistribute it and/or
7 *   modify it under the terms of the GNU Lesser General Public
8 *   License as published by the Free Software Foundation; either
9 *   version 2 of the License, or (at your option) any later version.
10 *
11 *   This library is distributed in the hope that it will be useful,
12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 *   Lesser General Public License for more details.
15 *
16 *   You should have received a copy of the GNU Lesser General Public
17 *   License along with this library; if not, write to the Free Software
18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 *   02111-1307  USA
20 */
21
22/**  \file box.c
23 *   \version \$Id: box.c 246 2003-12-11 16:31:49Z sam $
24 *   \author Sam Hocevar <sam@zoy.org>
25 *   \brief Simple box drawing functions
26 *
27 *   This file contains box drawing functions, both filled and outline.
28 */
29
30#include "config.h"
31
32#include <stdlib.h>
33
34#include "caca.h"
35#include "caca_internals.h"
36
37void caca_draw_box(int x1, int y1, int x2, int y2, char c)
38{
39    caca_draw_line(x1, y1, x1, y2, c);
40    caca_draw_line(x1, y2, x2, y2, c);
41    caca_draw_line(x2, y2, x2, y1, c);
42    caca_draw_line(x2, y1, x1, y1, c);
43}
44
45void caca_draw_thin_box(int x1, int y1, int x2, int y2)
46{
47    int x, y, xmax, ymax;
48
49    if(x1 > x2)
50    {
51        int tmp = x1;
52        x1 = x2; x2 = tmp;
53    }
54
55    if(y1 > y2)
56    {
57        int tmp = y1;
58        y1 = y2; y2 = tmp;
59    }
60
61    xmax = _caca_width - 1;
62    ymax = _caca_height - 1;
63
64    if(x2 < 0 || y2 < 0 || x1 > xmax || y1 > ymax)
65        return;
66
67    /* Draw edges */
68    if(y1 >= 0)
69        for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++)
70            caca_putchar(x, y1, '-');
71
72    if(y2 <= ymax)
73        for(x = x1 < 0 ? 1 : x1 + 1; x < x2 && x < xmax; x++)
74            caca_putchar(x, y2, '-');
75
76    if(x1 >= 0)
77        for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++)
78            caca_putchar(x1, y, '|');
79
80    if(x2 <= xmax)
81        for(y = y1 < 0 ? 1 : y1 + 1; y < y2 && y < ymax; y++)
82            caca_putchar(x2, y, '|');
83
84    /* Draw corners */
85    if(x1 >= 0 && y1 >= 0)
86        caca_putchar(x1, y1, ',');
87
88    if(x1 >= 0 && y2 <= ymax)
89        caca_putchar(x1, y2, '`');
90
91    if(x2 <= xmax && y1 >= 0)
92        caca_putchar(x2, y1, '.');
93
94    if(x2 <= xmax && y2 <= ymax)
95        caca_putchar(x2, y2, '\'');
96}
97
98void caca_fill_box(int x1, int y1, int x2, int y2, char c)
99{
100    int x, y, xmax, ymax;
101
102    if(x1 > x2)
103    {
104        int tmp = x1;
105        x1 = x2; x2 = tmp;
106    }
107
108    if(y1 > y2)
109    {
110        int tmp = y1;
111        y1 = y2; y2 = tmp;
112    }
113
114    xmax = _caca_width - 1;
115    ymax = _caca_height - 1;
116
117    if(x2 < 0 || y2 < 0 || x1 > xmax || y1 > ymax)
118        return;
119
120    if(x1 < 0) x1 = 0;
121    if(y1 < 0) y1 = 0;
122    if(x2 > xmax) x2 = xmax;
123    if(y2 > ymax) y2 = ymax;
124
125    for(y = y1; y <= y2; y++)
126        for(x = x1; x <= x2; x++)
127            caca_putchar(x, y, c);
128}
129
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