/*
* libcaca Colour ASCII-Art library
* Copyright (c) 2002-2009 Sam Hocevar <sam@hocevar.net>
* 2006 Jean-Yves Lamoureux <jylam@lnxscene.org>
* All Rights Reserved
*
* $Id$
*
* This library is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
/*
* This file contains text import and export functions
*/
#include "config.h"
#if !defined(__KERNEL__)
# include <stdlib.h>
# include <stdio.h>
# include <string.h>
#endif
#include "caca.h"
#include "caca_internals.h"
#include "codec.h"
struct import
{
uint32_t clearattr;
/* ANSI Graphic Rendition Combination Mode */
uint8_t fg, bg; /* ANSI-context fg/bg */
uint8_t dfg, dbg; /* Default fg/bg */
uint8_t bold, blink, italics, negative, concealed, underline;
uint8_t faint, strike, proportional; /* unsupported */
};
static void ansi_parse_grcm(caca_canvas_t *, struct import *,
unsigned int, unsigned int const *);
ssize_t _import_text(caca_canvas_t *cv, void const *data, size_t size)
{
char const *text = (char const *)data;
unsigned int width = 0, height = 0, x = 0, y = 0, i;
caca_set_canvas_size(cv, width, height);
for(i = 0; i < size; i++)
{
unsigned char ch = *text++;
if(ch == '\r')
continue;
if(ch == '\n')
{
x = 0;
y++;
continue;
}
if(x >= width || y >= height)
{
if(x >= width)
width = x + 1;
if(y >= height)
height = y + 1;
caca_set_canvas_size(cv, width, height);
}
caca_put_char(cv, x, y, ch);
x++;
}
if(y > height)
caca_set_canvas_size(cv, width, height = y);
return (ssize_t)size;
}
ssize_t _import_ansi(caca_canvas_t *cv, void const *data, size_t size, int utf8)
{
struct import im;
unsigned char const *buffer = (unsigned char const*)data;
unsigned int i, j, skip, growx = 0, growy = 0, dummy = 0;
unsigned int width, height;
uint32_t savedattr;
int x = 0, y = 0, save_x = 0, save_y = 0;
if(utf8)
{
width = cv->width;
height = cv->height;
growx = !width;
growy = !height;
x = cv->frames[cv->frame].x;
y = cv->frames[cv->frame].y;
}
else
{
caca_set_canvas_size(cv, width = 80, height = 0);
growx = 0;
growy = 1;
}
if(utf8)
{
im.dfg = CACA_DEFAULT;
im.dbg = CACA_TRANSPARENT;
}
else
{
im.dfg = CACA_LIGHTGRAY;
im.dbg = CACA_BLACK;
}
caca_set_color_ansi(cv, im.dfg, im.dbg);
im.clearattr = caca_get_attr(cv, -1, -1);
ansi_parse_grcm(cv, &im, 1, &dummy);
for(i = 0; i < size; i += skip)
{
uint32_t ch = 0;
int wch = 0;
skip = 1;
if(!utf8 && buffer[i] == '\x1a' && i + 7 < size
&& !memcmp(buffer + i + 1, "SAUCE00", 7))
break; /* End before SAUCE data */
else if(buffer[i] == '\r')
{
x = 0;
}
else if(buffer[i] == '\n')
{
x = 0;
y++;
}
else if(buffer[i] == '\t')
{
x = (x + 7) & ~7;
}
else if(buffer[i] == '\x08')
{
if(x > 0)
x--;
}
/* If there are not enough characters to parse the escape sequence,
* wait until the next try. We require 3. */
else if(buffer[i] == '\033' && i + 2 >= size)
break;
/* XXX: What the fuck is this shit? */
else if(buffer[i] == '\033' && buffer[i + 1] == '('
&& buffer[i + 2] == 'B')
{
skip += 2;
}
/* Interpret escape commands, as per Standard ECMA-48 "Control
* Functions for Coded Character Sets", 5.4. Control sequences. */
else if(buffer[i] == '\033' && buffer[i + 1] == '[')
{
unsigned int argc = 0, argv[101];
unsigned int param, inter, final;
/* Compute offsets to parameter bytes, intermediate bytes and
* to the final byte. Only the final byte is mandatory, there
* can be zero of the others.
* 0 param=2 inter final final+1
* +-----+------------------+---------------------+-----------------+
* | CSI | parameter bytes | intermediate bytes | final byte |
* | | 0x30 - 0x3f | 0x20 - 0x2f | 0x40 - 0x7e |
* | ^[[ | 0123456789:;<=>? | SPC !"#$%&'()*+,-./ | azAZ@[\]^_`{|}~ |
* +-----+------------------+---------------------+-----------------+
*/
param = 2;
for(inter = param; i + inter < size; inter++)
if(buffer[i + inter] < 0x30 || buffer[i + inter] > 0x3f)
break;
for(final = inter; i + final < size; final++)
if(buffer[i + final] < 0x20 || buffer[i + final] > 0x2f)
break;
if(i + final >= size
|| buffer[i + final] < 0x40 || buffer[i + final] > 0x7e)
break; /* Invalid Final Byte */
skip += final;
/* Sanity checks */
if(param < inter && buffer[i + param] >= 0x3c)
{
/* Private sequence, only parse what we know */
debug("ansi import: private sequence \"^[[%.*s\"",
final - param + 1, buffer + i + param);
continue; /* Private sequence, skip it entirely */
}
if(final - param > 100)
continue; /* Suspiciously long sequence, skip it */
/* Parse parameter bytes as per ECMA-48 5.4.2: Parameter string
* format */
if(param < inter)
{
argv[0] = 0;
for(j = param; j < inter; j++)
{
if(buffer[i + j] == ';')
argv[++argc] = 0;
else if(buffer[i + j] >= '0' && buffer[i + j] <= '9')
argv[argc] = 10 * argv[argc] + (buffer[i + j] - '0');
}
argc++;
}
/* Interpret final byte. The code representations are given in
* ECMA-48 5.4: Control sequences, and the code definitions are
* given in ECMA-48 8.3: Definition of control functions. */
switch(buffer[i + final])
{
case 'H': /* CUP (0x48) - Cursor Position */
x = (argc > 1 && argv[1] > 0) ? argv[1] - 1 : 0;
y = (argc > 0 && argv[0] > 0) ? argv[0] - 1 : 0;
break;
case 'A': /* CUU (0x41) - Cursor Up */
y -= argc ? argv[0] : 1;
if(y < 0)
y = 0;
break;
case 'B': /* CUD (0x42) - Cursor Down */
y += argc ? argv[0] : 1;
break;
case 'C': /* CUF (0x43) - Cursor Right */
x += argc ? argv[0] : 1;
break;
case 'D': /* CUB (0x44) - Cursor Left */
x -= argc ? argv[0] : 1;
if(x < 0)
x = 0;
break;
case 'G': /* CHA (0x47) - Cursor Character Absolute */
x = (argc && argv[0] > 0) ? argv[0] - 1 : 0;
break;
case 'J': /* ED (0x4a) - Erase In Page */
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
if(!argc || argv[0] == 0)
{
caca_draw_line(cv, x, y, width, y, ' ');
caca_fill_box(cv, 0, y + 1, width - 1, height - 1, ' ');
}
else if(argv[0] == 1)
{
caca_fill_box(cv, 0, 0, width - 1, y - 1, ' ');
caca_draw_line(cv, 0, y, x, y, ' ');
}
else if(argv[0] == 2)
//x = y = 0;
caca_fill_box(cv, 0, 0, width - 1, height - 1, ' ');
caca_set_attr(cv, savedattr);
break;
case 'K': /* EL (0x4b) - Erase In Line */
if(!argc || argv[0] == 0)
caca_draw_line(cv, x, y, width, y, ' ');
else if(argv[0] == 1)
caca_draw_line(cv, 0, y, x, y, ' ');
else if(argv[0] == 2)
if((unsigned int)x < width)
caca_draw_line(cv, x, y, width - 1, y, ' ');
//x = width;
break;
case 'P': /* DCH (0x50) - Delete Character */
if(!argc || argv[0] == 0)
argv[0] = 1; /* echo -ne 'foobar\r\e[0P\n' */
for(j = 0; (unsigned int)(j + argv[0]) < width; j++)
{
caca_put_char(cv, j, y,
caca_get_char(cv, j + argv[0], y));
caca_put_attr(cv, j, y,
caca_get_attr(cv, j + argv[0], y));
}
#if 0
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
for( ; (unsigned int)j < width; j++)
caca_put_char(cv, j, y, ' ');
caca_set_attr(cv, savedattr);
#endif
case 'X': /* ECH (0x58) - Erase Character */
if(argc && argv[0])
{
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
caca_draw_line(cv, x, y, x + argv[0] - 1, y, ' ');
caca_set_attr(cv, savedattr);
}
case 'd': /* VPA (0x64) - Line Position Absolute */
y = (argc && argv[0] > 0) ? argv[0] - 1 : 0;
break;
case 'f': /* HVP (0x66) - Character And Line Position */
x = (argc > 1 && argv[1] > 0) ? argv[1] - 1 : 0;
y = (argc > 0 && argv[0] > 0) ? argv[0] - 1 : 0;
break;
case 'h': /* SM (0x68) - FIXME */
debug("ansi import: set mode %i", argc ? (int)argv[0] : -1);
break;
case 'l': /* RM (0x6c) - FIXME */
debug("ansi import: reset mode %i", argc ? (int)argv[0] : -1);
break;
case 'm': /* SGR (0x6d) - Select Graphic Rendition */
if(argc)
ansi_parse_grcm(cv, &im, argc, argv);
else
ansi_parse_grcm(cv, &im, 1, &dummy);
break;
case 's': /* Private (save cursor position) */
save_x = x;
save_y = y;
break;
case 'u': /* Private (reload cursor position) */
x = save_x;
y = save_y;
break;
default:
debug("ansi import: unknown command \"^[[%.*s\"",
final - param + 1, buffer + i + param);
break;
}
}
/* Parse OSC stuff. */
else if(buffer[i] == '\033' && buffer[i + 1] == ']')
{
char *string;
unsigned int command = 0;
unsigned int mode = 2, semicolon, final;
for(semicolon = mode; i + semicolon < size; semicolon++)
{
if(buffer[i + semicolon] < '0' || buffer[i + semicolon] > '9')
break;
command = 10 * command + (buffer[i + semicolon] - '0');
}
if(i + semicolon >= size || buffer[i + semicolon] != ';')
break; /* Invalid Mode */
for(final = semicolon + 1; i + final < size; final++)
if(buffer[i + final] < 0x20)
break;
if(i + final >= size || buffer[i + final] != '\a')
break; /* Not enough data or no bell found */
/* FIXME: XTerm also reacts to <ESC><backslash> and <ST> */
/* FIXME: differenciate between not enough data (try again)
* and invalid data (print shit) */
skip += final;
string = malloc(final - (semicolon + 1) + 1);
memcpy(string, buffer + (semicolon + 1), final - (semicolon + 1));
string[final - (semicolon + 1)] = '\0';
debug("ansi import: got OSC command %i string '%s'", command,
string);
free(string);
}
/* Form feed means a new frame */
else if(buffer[i] == '\f' && buffer[i + 1] == '\n')
{
int f = caca_get_frame_count(cv);
caca_create_frame(cv, f);
caca_set_frame(cv, f);
x = y = 0;
skip++;
}
/* Get the character we’re going to paste */
else if(utf8)
{
size_t bytes;
if(i + 6 < size)
ch = caca_utf8_to_utf32((char const *)(buffer + i), &bytes);
else
{
/* Add a trailing zero to what we're going to read */
char tmp[7];
memcpy(tmp, buffer + i, size - i);
tmp[size - i] = '\0';
ch = caca_utf8_to_utf32(tmp, &bytes);
}
if(!bytes)
{
/* If the Unicode is invalid, assume it was latin1. */
ch = buffer[i];
bytes = 1;
}
wch = caca_utf32_is_fullwidth(ch) ? 2 : 1;
skip += (int)(bytes - 1);
}
else
{
ch = caca_cp437_to_utf32(buffer[i]);
wch = 1;
}
/* Wrap long lines or grow horizontally */
while((unsigned int)x + wch > width)
{
if(growx)
{
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
caca_set_canvas_size(cv, width = x + wch, height);
caca_set_attr(cv, savedattr);
}
else
{
x -= width;
y++;
}
}
/* Scroll or grow vertically */
if((unsigned int)y >= height)
{
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
if(growy)
{
caca_set_canvas_size(cv, width, height = y + 1);
}
else
{
int lines = (y - height) + 1;
for(j = 0; j + lines < height; j++)
{
memcpy(cv->attrs + j * cv->width,
cv->attrs + (j + lines) * cv->width, cv->width * 4);
memcpy(cv->chars + j * cv->width,
cv->chars + (j + lines) * cv->width, cv->width * 4);
}
caca_fill_box(cv, 0, height - lines,
cv->width - 1, height - 1, ' ');
y -= lines;
}
caca_set_attr(cv, savedattr);
}
/* Now paste our character, if any */
if(wch)
{
caca_put_char(cv, x, y, ch);
x += wch;
}
}
if(growy && (unsigned int)y > height)
{
savedattr = caca_get_attr(cv, -1, -1);
caca_set_attr(cv, im.clearattr);
caca_set_canvas_size(cv, width, height = y);
caca_set_attr(cv, savedattr);
}
cv->frames[cv->frame].x = x;
cv->frames[cv->frame].y = y;
// if(utf8)
// caca_set_attr(cv, savedattr);
return i;
}
/* Generate UTF-8 representation of current canvas. */
void *_export_utf8(caca_canvas_t const *cv, size_t *bytes, int cr)
{
static uint8_t const palette[] =
{
0, 4, 2, 6, 1, 5, 3, 7,
8, 12, 10, 14, 9, 13, 11, 15
};
char *data, *cur;
int x, y;
/* 23 bytes assumed for max length per pixel ('\e[5;1;3x;4y;9x;10ym' plus
* 4 max bytes for a UTF-8 character).
* Add height*9 to that (zeroes color at the end and jump to next line) */
*bytes = (cv->height * 9) + (cv->width * cv->height * 23);
cur = data = malloc(*bytes);
for(y = 0; y < cv->height; y++)
{
uint32_t *lineattr = cv->attrs + y * cv->width;
uint32_t *linechar = cv->chars + y * cv->width;
uint8_t prevfg = 0x10;
uint8_t prevbg = 0x10;
for(x = 0; x < cv->width; x++)
{
uint32_t attr = lineattr[x];
uint32_t ch = linechar[x];
uint8_t ansifg, ansibg, fg, bg;
if(ch == CACA_MAGIC_FULLWIDTH)
continue;
ansifg = caca_attr_to_ansi_fg(attr);
ansibg = caca_attr_to_ansi_bg(attr);
fg = ansifg < 0x10 ? palette[ansifg] : 0x10;
bg = ansibg < 0x10 ? palette[ansibg] : 0x10;
/* TODO: the [0 could be omitted in some cases */
if(fg != prevfg || bg != prevbg)
{
cur += sprintf(cur, "\033[0");
if(fg < 8)
cur += sprintf(cur, ";3%d", fg);
else if(fg < 16)
cur += sprintf(cur, ";1;3%d;9%d", fg - 8, fg - 8);
if(bg < 8)
cur += sprintf(cur, ";4%d", bg);
else if(bg < 16)
cur += sprintf(cur, ";5;4%d;10%d", bg - 8, bg - 8);
cur += sprintf(cur, "m");
}
cur += caca_utf32_to_utf8(cur, ch);
prevfg = fg;
prevbg = bg;
}
if(prevfg != 0x10 || prevbg != 0x10)
cur += sprintf(cur, "\033[0m");
cur += sprintf(cur, cr ? "\r\n" : "\n");
}
/* Crop to really used size */
debug("utf8 export: alloc %lu bytes, realloc %lu",
(unsigned long int)*bytes, (unsigned long int)(cur - data));
*bytes = (uintptr_t)(cur - data);
data = realloc(data, *bytes);
return data;
}
/* Generate ANSI representation of current canvas. */
void *_export_ansi(caca_canvas_t const *cv, size_t *bytes)
{
static uint8_t const palette[] =
{
0, 4, 2, 6, 1, 5, 3, 7,
8, 12, 10, 14, 9, 13, 11, 15
};
char *data, *cur;
int x, y;
uint8_t prevfg = -1;
uint8_t prevbg = -1;
/* 16 bytes assumed for max length per pixel ('\e[5;1;3x;4ym' plus
* 1 byte for a CP437 character).
* Add height*9 to that (zeroes color at the end and jump to next line) */
*bytes = (cv->height * 9) + (cv->width * cv->height * 16);
cur = data = malloc(*bytes);
for(y = 0; y < cv->height; y++)
{
uint32_t *lineattr = cv->attrs + y * cv->width;
uint32_t *linechar = cv->chars + y * cv->width;
for(x = 0; x < cv->width; x++)
{
uint8_t ansifg = caca_attr_to_ansi_fg(lineattr[x]);
uint8_t ansibg = caca_attr_to_ansi_bg(lineattr[x]);
uint8_t fg = ansifg < 0x10 ? palette[ansifg] : CACA_LIGHTGRAY;
uint8_t bg = ansibg < 0x10 ? palette[ansibg] : CACA_BLACK;
uint32_t ch = linechar[x];
if(ch == CACA_MAGIC_FULLWIDTH)
ch = '?';
if(fg != prevfg || bg != prevbg)
{
cur += sprintf(cur, "\033[0;");
if(fg < 8)
if(bg < 8)
cur += sprintf(cur, "3%d;4%dm", fg, bg);
else
cur += sprintf(cur, "5;3%d;4%dm", fg, bg - 8);
else
if(bg < 8)
cur += sprintf(cur, "1;3%d;4%dm", fg - 8, bg);
else
cur += sprintf(cur, "5;1;3%d;4%dm", fg - 8, bg - 8);
}
*cur++ = caca_utf32_to_cp437(ch);
prevfg = fg;
prevbg = bg;
}
if(cv->width == 80)
{
cur += sprintf(cur, "\033[s\n\033[u");
}
else
{
cur += sprintf(cur, "\033[0m\r\n");
prevfg = -1;
prevbg = -1;
}
}
/* Crop to really used size */
debug("ansi export: alloc %lu bytes, realloc %lu",
(unsigned long int)*bytes, (unsigned long int)(cur - data));
*bytes = (uintptr_t)(cur - data);
data = realloc(data, *bytes);
return data;
}
/* Export a text file with IRC colours */
void *_export_irc(caca_canvas_t const *cv, size_t *bytes)
{
static uint8_t const palette[] =
{
1, 2, 3, 10, 5, 6, 7, 15, /* Dark */
14, 12, 9, 11, 4, 13, 8, 0, /* Light */
};
char *data, *cur;
int x, y;
/* 14 bytes assumed for max length per pixel. Worst case scenario:
* ^Cxx,yy 6 bytes
* ^B^B 2 bytes
* ch 6 bytes
* 3 bytes for max length per line. Worst case scenario:
* <spc> 1 byte (for empty lines)
* \r\n 2 bytes
* In real life, the average bytes per pixel value will be around 5.
*/
*bytes = 2 + cv->height * (3 + cv->width * 14);
cur = data = malloc(*bytes);
for(y = 0; y < cv->height; y++)
{
uint32_t *lineattr = cv->attrs + y * cv->width;
uint32_t *linechar = cv->chars + y * cv->width;
uint8_t prevfg = 0x10;
uint8_t prevbg = 0x10;
for(x = 0; x < cv->width; x++)
{
uint32_t attr = lineattr[x];
uint32_t ch = linechar[x];
uint8_t ansifg, ansibg, fg, bg;
if(ch == CACA_MAGIC_FULLWIDTH)
continue;
ansifg = caca_attr_to_ansi_fg(attr);
ansibg = caca_attr_to_ansi_bg(attr);
fg = ansifg < 0x10 ? palette[ansifg] : 0x10;
bg = ansibg < 0x10 ? palette[ansibg] : 0x10;
/* TODO: optimise series of same fg / same bg
* don't change fg value if ch == ' '
* make sure the \x03,%d trick works everywhere */
if(bg != prevbg || fg != prevfg)
{
int need_escape = 0;
if(bg == 0x10)
{
if(fg == 0x10)
cur += sprintf(cur, "\x0f");
else
{
if(prevbg == 0x10)
cur += sprintf(cur, "\x03%d", fg);
else
cur += sprintf(cur, "\x0f\x03%d", fg);
if(ch == (uint32_t)',')
need_escape = 1;
}
}
else
{
if(fg == 0x10)
cur += sprintf(cur, "\x0f\x03,%d", bg);
else
cur += sprintf(cur, "\x03%d,%d", fg, bg);
}
if(ch >= (uint32_t)'0' && ch <= (uint32_t)'9')
need_escape = 1;
if(need_escape)
cur += sprintf(cur, "\x02\x02");
}
cur += caca_utf32_to_utf8(cur, ch);
prevfg = fg;
prevbg = bg;
}
/* TODO: do the same the day we optimise whole lines above */
if(!cv->width)
*cur++ = ' ';
*cur++ = '\r';
*cur++ = '\n';
}
/* Crop to really used size */
debug("IRC export: alloc %lu bytes, realloc %lu",
(unsigned long int)*bytes, (unsigned long int)(cur - data));
*bytes = (uintptr_t)(cur - data);
data = realloc(data, *bytes);
return data;
}
/* XXX : ANSI loader helper */
static void ansi_parse_grcm(caca_canvas_t *cv, struct import *im,
unsigned int argc, unsigned int const *argv)
{
static uint8_t const ansi2caca[] =
{
CACA_BLACK, CACA_RED, CACA_GREEN, CACA_BROWN,
CACA_BLUE, CACA_MAGENTA, CACA_CYAN, CACA_LIGHTGRAY
};
unsigned int j;
uint8_t efg, ebg; /* Effective (libcaca) fg/bg */
for(j = 0; j < argc; j++)
{
/* Defined in ECMA-48 8.3.117: SGR - SELECT GRAPHIC RENDITION */
if(argv[j] >= 30 && argv[j] <= 37)
im->fg = ansi2caca[argv[j] - 30];
else if(argv[j] >= 40 && argv[j] <= 47)
im->bg = ansi2caca[argv[j] - 40];
else if(argv[j] >= 90 && argv[j] <= 97)
im->fg = ansi2caca[argv[j] - 90] + 8;
else if(argv[j] >= 100 && argv[j] <= 107)
im->bg = ansi2caca[argv[j] - 100] + 8;
else switch(argv[j])
{
case 0: /* default rendition */
im->fg = im->dfg;
im->bg = im->dbg;
im->bold = im->blink = im->italics = im->negative
= im->concealed = im->underline = im->faint = im->strike
= im->proportional = 0;
break;
case 1: /* bold or increased intensity */
im->bold = 1;
break;
case 2: /* faint, decreased intensity or second colour */
im->faint = 1;
break;
case 3: /* italicized */
im->italics = 1;
break;
case 4: /* singly underlined */
im->underline = 1;
break;
case 5: /* slowly blinking (less then 150 per minute) */
case 6: /* rapidly blinking (150 per minute or more) */
im->blink = 1;
break;
case 7: /* negative image */
im->negative = 1;
break;
case 8: /* concealed characters */
im->concealed = 1;
break;
case 9: /* crossed-out (characters still legible but marked as to be
* deleted */
im->strike = 1;
break;
case 21: /* doubly underlined */
im->underline = 1;
break;
case 22: /* normal colour or normal intensity (neither bold nor
* faint) */
im->bold = im->faint = 0;
break;
case 23: /* not italicized, not fraktur */
im->italics = 0;
break;
case 24: /* not underlined (neither singly nor doubly) */
im->underline = 0;
break;
case 25: /* steady (not blinking) */
im->blink = 0;
break;
case 26: /* (reserved for proportional spacing as specified in CCITT
* Recommendation T.61) */
im->proportional = 1;
break;
case 27: /* positive image */
im->negative = 0;
break;
case 28: /* revealed characters */
im->concealed = 0;
break;
case 29: /* not crossed out */
im->strike = 0;
break;
case 38: /* (reserved for future standardization, intended for setting
* character foreground colour as specified in ISO 8613-6
* [CCITT Recommendation T.416]) */
break;
case 39: /* default display colour (implementation-defined) */
im->fg = im->dfg;
break;
case 48: /* (reserved for future standardization, intended for setting
* character background colour as specified in ISO 8613-6
* [CCITT Recommendation T.416]) */
break;
case 49: /* default background colour (implementation-defined) */
im->bg = im->dbg;
break;
case 50: /* (reserved for cancelling the effect of the rendering
* aspect established by parameter value 26) */
im->proportional = 0;
break;
default:
debug("ansi import: unknown sgr %i", argv[j]);
break;
}
}
if(im->concealed)
{
efg = ebg = CACA_TRANSPARENT;
}
else
{
efg = im->negative ? im->bg : im->fg;
ebg = im->negative ? im->fg : im->bg;
if(im->bold)
{
if(efg < 8)
efg += 8;
else if(efg == CACA_DEFAULT)
efg = CACA_WHITE;
}
}
caca_set_color_ansi(cv, efg, ebg);
}