source: libcaca/trunk/cucul/export_ansi.c @ 769

Last change on this file since 769 was 769, checked in by Sam Hocevar, 14 years ago
  • Removed \file directives from all files except caca.h and cucul.h, to remove redundencies in the Doxygen documentation.
  • Property svn:keywords set to Id
File size: 3.0 KB
Line 
1/*
2 *  libcucul      Canvas for ultrafast compositing of Unicode letters
3 *  Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org>
4 *                2006 Jean-Yves Lamoureux <jylam@lnxscene.org>
5 *                All Rights Reserved
6 *
7 *  $Id: export_ansi.c 769 2006-04-14 07:30:53Z sam $
8 *
9 *  This library is free software; you can redistribute it and/or
10 *  modify it under the terms of the Do What The Fuck You Want To
11 *  Public License, Version 2, as published by Sam Hocevar. See
12 *  http://sam.zoy.org/wtfpl/COPYING for more details.
13 */
14
15/*
16 *  This file contains export functions for ANSI
17 */
18
19#include "config.h"
20
21#if !defined(__KERNEL__)
22#   include <stdlib.h>
23#   include <stdio.h>
24#   include <string.h>
25#endif
26
27#include "cucul.h"
28#include "cucul_internals.h"
29
30/** \brief Generate ANSI representation of current image.
31 *
32 *  This function generates and returns an ANSI representation of
33 *  the current image.
34 *  \param trailing if 0, raw ANSI will be generated. Otherwise, you'll be
35 *                  able to cut/paste the result to a function like printf
36 *  \return buffer containing generated ANSI codes as a big string
37 */
38void _cucul_get_ansi(cucul_t *qq, struct cucul_buffer *ex)
39{
40    static int const palette[] =
41    {
42        0,  4,  2,  6, 1,  5,  3,  7,
43        8, 12, 10, 14, 9, 13, 11, 15
44    };
45
46    char *cur;
47    unsigned int x, y;
48
49    /* 23 bytes assumed for max length per pixel ('\e[5;1;3x;4y;9x;10ym' plus
50     * 4 max bytes for a UTF-8 character).
51     * Add height*9 to that (zeroes color at the end and jump to next line) */
52    ex->size = (qq->height * 9) + (qq->width * qq->height * 23);
53    ex->data = malloc(ex->size);
54
55    cur = ex->data;
56
57    for(y = 0; y < qq->height; y++)
58    {
59        uint32_t *lineattr = qq->attr + y * qq->width;
60        uint32_t *linechar = qq->chars + y * qq->width;
61
62        uint8_t prevfg = -1;
63        uint8_t prevbg = -1;
64
65        for(x = 0; x < qq->width; x++)
66        {
67            uint8_t fg = palette[_cucul_argb32_to_ansi4fg(lineattr[x])];
68            uint8_t bg = palette[_cucul_argb32_to_ansi4bg(lineattr[x])];
69            uint32_t c = linechar[x];
70
71            if(fg != prevfg || bg != prevbg)
72            {
73                cur += sprintf(cur, "\033[0;");
74
75                if(fg < 8)
76                    if(bg < 8)
77                        cur += sprintf(cur, "3%d;4%dm", fg, bg);
78                    else
79                        cur += sprintf(cur, "5;3%d;4%d;10%dm",
80                                            fg, bg - 8, bg - 8);
81                else
82                    if(bg < 8)
83                        cur += sprintf(cur, "1;3%d;4%d;9%dm",
84                                            fg - 8, bg, fg - 8);
85                    else
86                        cur += sprintf(cur, "5;1;3%d;4%d;9%d;10%dm",
87                                            fg - 8, bg - 8, fg - 8, bg - 8);
88            }
89
90            *cur++ = c & 0x7f;
91
92            prevfg = fg;
93            prevbg = bg;
94        }
95
96        cur += sprintf(cur, "\033[0m\r\n");
97    }
98
99    /* Crop to really used size */
100    ex->size = (uintptr_t)(cur - ex->data);
101    ex->data = realloc(ex->data, ex->size);
102}
103
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