/*
* 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 various 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"
static inline int sprintu32(char *s, uint32_t x)
{
s[0] = (uint8_t)(x >> 24);
s[1] = (uint8_t)(x >> 16) & 0xff;
s[2] = (uint8_t)(x >> 8) & 0xff;
s[3] = (uint8_t)(x ) & 0xff;
return 4;
}
static inline int sprintu16(char *s, uint16_t x)
{
s[0] = (uint8_t)(x >> 8) & 0xff;
s[1] = (uint8_t)(x ) & 0xff;
return 2;
}
static void *export_caca(caca_canvas_t const *, size_t *);
static void *export_html(caca_canvas_t const *, size_t *);
static void *export_html3(caca_canvas_t const *, size_t *);
static void *export_bbfr(caca_canvas_t const *, size_t *);
static void *export_ps(caca_canvas_t const *, size_t *);
static void *export_svg(caca_canvas_t const *, size_t *);
static void *export_tga(caca_canvas_t const *, size_t *);
/** \brief Export a canvas into a foreign format.
*
* This function exports a libcaca canvas into various foreign formats such
* as ANSI art, HTML, IRC colours, etc. The returned pointer should be passed
* to free() to release the allocated storage when it is no longer needed.
*
* Valid values for \c format are:
* - \c "caca": export native libcaca files.
* - \c "ansi": export ANSI art (CP437 charset with ANSI colour codes).
* - \c "html": export an HTML page with CSS information.
* - \c "html3": export an HTML table that should be compatible with
* most navigators, including textmode ones.
* - \c "irc": export UTF-8 text with mIRC colour codes.
* - \c "ps": export a PostScript document.
* - \c "svg": export an SVG vector image.
* - \c "tga": export a TGA image.
*
* If an error occurs, NULL is returned and \b errno is set accordingly:
* - \c EINVAL Unsupported format requested.
* - \c ENOMEM Not enough memory to allocate output buffer.
*
* \param cv A libcaca canvas
* \param format A string describing the requested output format.
* \param bytes A pointer to a size_t where the number of allocated bytes
* will be written.
* \return A pointer to the exported memory area, or NULL in case of error.
*/
void *caca_export_canvas_to_memory(caca_canvas_t const *cv, char const *format,
size_t *bytes)
{
if(!strcasecmp("caca", format))
return export_caca(cv, bytes);
if(!strcasecmp("ansi", format))
return _export_ansi(cv, bytes);
if(!strcasecmp("utf8", format))
return _export_utf8(cv, bytes, 0);
if(!strcasecmp("utf8cr", format))
return _export_utf8(cv, bytes, 1);
if(!strcasecmp("html", format))
return export_html(cv, bytes);
if(!strcasecmp("html3", format))
return export_html3(cv, bytes);
if(!strcasecmp("bbfr", format))
return export_bbfr(cv, bytes);
if(!strcasecmp("irc", format))
return _export_irc(cv, bytes);
if(!strcasecmp("ps", format))
return export_ps(cv, bytes);
if(!strcasecmp("svg", format))
return export_svg(cv, bytes);
if(!strcasecmp("tga", format))
return export_tga(cv, bytes);
seterrno(EINVAL);
return NULL;
}
/** \brief Export a canvas portion into a foreign format.
*
* This function exports a portion of a \e libcaca canvas into various
* formats. For more information, see caca_export_canvas_to_memory().
*
* If an error occurs, NULL is returned and \b errno is set accordingly:
* - \c EINVAL Unsupported format requested or invalid coordinates.
* - \c ENOMEM Not enough memory to allocate output buffer.
*
* \param cv A libcaca canvas
* \param x The leftmost coordinate of the area to export.
* \param y The topmost coordinate of the area to export.
* \param w The width of the area to export.
* \param h The height of the area to export.
* \param format A string describing the requested output format.
* \param bytes A pointer to a size_t where the number of allocated bytes
* will be written.
* \return A pointer to the exported memory area, or NULL in case of error.
*/
void *caca_export_area_to_memory(caca_canvas_t const *cv, int x, int y, int w,
int h, char const *format, size_t *bytes)
{
caca_canvas_t *tmp;
void *ret;
if(w < 0 || h < 0 || x < 0 || y < 0
|| x + w > cv->width || y + h > cv->height)
{
seterrno(EINVAL);
return NULL;
}
/* TODO: we need to spare the blit here by exporting the area we want. */
tmp = caca_create_canvas(w, h);
caca_blit(tmp, -x, -y, cv, NULL);
ret = caca_export_canvas_to_memory(tmp, format, bytes);
caca_free_canvas(tmp);
return ret;
}
/** \brief Get available export formats
*
* Return a list of available export formats. The list is a NULL-terminated
* array of strings, interleaving a string containing the internal value for
* the export format, to be used with caca_export_memory(), and a string
* containing the natural language description for that export format.
*
* This function never fails.
*
* \return An array of strings.
*/
char const * const * caca_get_export_list(void)
{
static char const * const list[] =
{
"caca", "native libcaca format",
"ansi", "ANSI",
"utf8", "UTF-8 with ANSI escape codes",
"utf8cr", "UTF-8 with ANSI escape codes and MS-DOS \\r",
"html", "HTML",
"html3", "backwards-compatible HTML",
"bbfr", "BBCode (French)",
"irc", "IRC with mIRC colours",
"ps", "PostScript document",
"svg", "SVG vector image",
"tga", "TGA image",
NULL, NULL
};
return list;
}
/*
* XXX: the following functions are local.
*/
/* Generate a native libcaca canvas file. */
static void *export_caca(caca_canvas_t const *cv, size_t *bytes)
{
char *data, *cur;
int f, n;
/* 52 bytes for the header:
* - 4 bytes for "\xCA\xCA" + "CV"
* - 16 bytes for the canvas header
* - 32 bytes for the frame info
* 8 bytes for each character cell */
*bytes = 20 + (32 + 8 * cv->width * cv->height) * cv->framecount;
cur = data = malloc(*bytes);
/* magic */
cur += sprintf(cur, "%s", "\xCA\xCA" "CV");
/* canvas_header */
cur += sprintu32(cur, 16 + 32 * cv->framecount);
cur += sprintu32(cur, cv->width * cv->height * 8 * cv->framecount);
cur += sprintu16(cur, 0x0001);
cur += sprintu32(cur, cv->framecount);
cur += sprintu16(cur, 0x0000);
/* frame_info */
for(f = 0; f < cv->framecount; f++)
{
cur += sprintu32(cur, cv->width);
cur += sprintu32(cur, cv->height);
cur += sprintu32(cur, 0);
cur += sprintu32(cur, cv->curattr);
cur += sprintu32(cur, cv->frames[f].x);
cur += sprintu32(cur, cv->frames[f].y);
cur += sprintu32(cur, cv->frames[f].handlex);
cur += sprintu32(cur, cv->frames[f].handley);
}
/* canvas_data */
for(f = 0; f < cv->framecount; f++)
{
uint32_t *attrs = cv->frames[f].attrs;
uint32_t *chars = cv->frames[f].chars;
for(n = cv->height * cv->width; n--; )
{
cur += sprintu32(cur, *chars++);
cur += sprintu32(cur, *attrs++);
}
}
return data;
}
/* Generate HTML representation of current canvas. */
static void *export_html(caca_canvas_t const *cv, size_t *bytes)
{
char *data, *cur;
int x, y, len;
/* The HTML header: less than 1000 bytes
* A line: 7 chars for "<br />\n"
* A glyph: 47 chars for "<span style="color:#xxx;background-color:#xxx">"
* 83 chars for ";font-weight..."
* up to 10 chars for "&#xxxxxxx;", far less for pure ASCII
* 7 chars for "</span>" */
*bytes = 1000 + cv->height * (7 + cv->width * (47 + 83 + 10 + 7));
cur = data = malloc(*bytes);
/* HTML header */
cur += sprintf(cur, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n");
cur += sprintf(cur, " \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n");
cur += sprintf(cur, "<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" xml:lang=\"en\">");
cur += sprintf(cur, "<head>\n");
cur += sprintf(cur, "<title>Generated by libcaca %s</title>\n",
caca_get_version());
cur += sprintf(cur, "</head><body>\n");
cur += sprintf(cur, "<div style=\"%s\">\n",
"font-family: monospace, fixed; font-weight: bold;");
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 += len)
{
cur += sprintf(cur, "<span style=\"");
if(caca_attr_to_ansi_fg(lineattr[x]) != CACA_DEFAULT)
cur += sprintf(cur, ";color:#%.03x",
caca_attr_to_rgb12_fg(lineattr[x]));
if(caca_attr_to_ansi_bg(lineattr[x]) < 0x10)
cur += sprintf(cur, ";background-color:#%.03x",
caca_attr_to_rgb12_bg(lineattr[x]));
if(lineattr[x] & CACA_BOLD)
cur += sprintf(cur, ";font-weight:bold");
if(lineattr[x] & CACA_ITALICS)
cur += sprintf(cur, ";font-style:italic");
if(lineattr[x] & CACA_UNDERLINE)
cur += sprintf(cur, ";text-decoration:underline");
if(lineattr[x] & CACA_BLINK)
cur += sprintf(cur, ";text-decoration:blink");
cur += sprintf(cur, "\">");
for(len = 0;
x + len < cv->width && lineattr[x + len] == lineattr[x];
len++)
{
if(linechar[x + len] == CACA_MAGIC_FULLWIDTH)
;
else if((linechar[x + len] <= 0x00000020)
||
((linechar[x + len] >= 0x0000007f)
&&
(linechar[x + len] <= 0x000000a0)))
{
/* Control characters and space converted to
* U+00A0 NO-BREAK SPACE, a.k.a. " " in HTML,
* but we use the equivalent numeric character
* reference   so this will work in plain
* XHTML with no DTD too. */
cur += sprintf(cur, " ");
}
else if(linechar[x + len] == '&')
cur += sprintf(cur, "&");
else if(linechar[x + len] == '<')
cur += sprintf(cur, "<");
else if(linechar[x + len] == '>')
cur += sprintf(cur, ">");
else if(linechar[x + len] == '\"')
cur += sprintf(cur, """);
else if(linechar[x + len] == '\'')
cur += sprintf(cur, "'");
else if(linechar[x + len] < 0x00000080)
cur += sprintf(cur, "%c", (uint8_t)linechar[x + len]);
else if((linechar[x + len] <= 0x0010fffd)
&&
((linechar[x + len] & 0x0000fffe) != 0x0000fffe)
&&
((linechar[x + len] < 0x0000d800)
||
(linechar[x + len] > 0x0000dfff)))
cur += sprintf(cur, "&#%i;", (unsigned int)linechar[x + len]);
else
/* non-character codepoints become U+FFFD
* REPLACEMENT CHARACTER */
cur += sprintf(cur, "&#%i;", (unsigned int)0x0000fffd);
}
cur += sprintf(cur, "</span>");
}
/* New line */
cur += sprintf(cur, "<br />\n");
}
cur += sprintf(cur, "</div></body></html>\n");
/* Crop to really used size */
debug("html 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 an HTML3 document. This function is way bigger than export_html(),
* but permits viewing in old browsers (or limited ones such as links). It
* will not work under gecko (mozilla rendering engine) unless you set a
* correct header. */
static void *export_html3(caca_canvas_t const *cv, size_t *bytes)
{
char *data, *cur;
int x, y, len;
int has_multi_cell_row = 0;
unsigned char *cell_boundary_bitmap;
/* Table */
cell_boundary_bitmap = (unsigned char *) malloc((cv->width + 7) / 8);
if(cell_boundary_bitmap)
memset((void *) cell_boundary_bitmap, 0, (cv->width + 7) / 8);
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 = 1; x < cv->width; x++)
if((! (cell_boundary_bitmap
?
(cell_boundary_bitmap[x / 8] & (1 << (x % 8)))
:
has_multi_cell_row))
&&
(((linechar[x - 1] == CACA_MAGIC_FULLWIDTH)
&&
(! caca_utf32_is_fullwidth(linechar[x])))
||
(caca_attr_to_ansi_bg(lineattr[x - 1])
!=
caca_attr_to_ansi_bg(lineattr[x]))
||
((caca_attr_to_ansi_bg(lineattr[x]) < 0x10)
?
(_caca_attr_to_rgb24bg(lineattr[x - 1])
!=
_caca_attr_to_rgb24bg(lineattr[x]))
:
0)))
{
has_multi_cell_row = 1;
if(cell_boundary_bitmap)
cell_boundary_bitmap[x / 8] |= 1 << (x % 8);
}
}
/* The HTML table markup: less than 1000 bytes
* A line: 10 chars for "<tr></tr>\n"
* A glyph: up to 48 chars for "<td bgcolor=\"#xxxxxx\"><tt><font color=\"#xxxxxx\">"
* up to 36 chars for "<b><i><u><blink></blink></u></i></b>"
* up to 10 chars for "&#xxxxxxx;" (far less for pure ASCII)
* 17 chars for "</font></tt></td>" */
*bytes = 1000 + cv->height * (10 + cv->width * (48 + 36 + 10 + 17));
cur = data = malloc(*bytes);
cur += sprintf(cur, "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" summary=\"[libcaca canvas export]\">\n");
for(y = 0; y < cv->height; y++)
{
uint32_t *lineattr = cv->attrs + y * cv->width;
uint32_t *linechar = cv->chars + y * cv->width;
cur += sprintf(cur, "<tr>");
for(x = 0; x < cv->width; x += len)
{
int i, needfont = 0;
int nonblank = 0;
/* Use colspan option to factor cells with same attributes
* (see below) */
len = 1;
while((x + len < cv->width)
&&
((y
&&
(linechar[x + len] > 0x00000020)
&&
((linechar[x + len] < 0x0000007f)
||
(linechar[x + len] > 0x000000a0)))
||
(! (cell_boundary_bitmap
?
(cell_boundary_bitmap[(x + len) / 8] & (1 << ((x + len) % 8)))
:
has_multi_cell_row))
||
(linechar[x + len] == CACA_MAGIC_FULLWIDTH)
||
(cv->height == 1))
&&
((linechar[x + len - 1] != CACA_MAGIC_FULLWIDTH)
||
caca_utf32_is_fullwidth(linechar[x + len]))
&&
(caca_attr_to_ansi_bg(lineattr[x + len])
==
caca_attr_to_ansi_bg(lineattr[x]))
&&
((caca_attr_to_ansi_bg(lineattr[x]) < 0x10)
?
(_caca_attr_to_rgb24bg(lineattr[x + len])
==
_caca_attr_to_rgb24bg(lineattr[x]))
:
1))
len++;
for(i = 0; i < len; i++)
if(! ((linechar[x + i] <= 0x00000020)
||
((linechar[x + i] >= 0x0000007f)
&&
(linechar[x + i] <= 0x000000a0))))
nonblank = 1;
cur += sprintf(cur, "<td");
if(caca_attr_to_ansi_bg(lineattr[x]) < 0x10)
cur += sprintf(cur, " bgcolor=\"#%.06lx\"", (unsigned long int)
_caca_attr_to_rgb24bg(lineattr[x]));
if(has_multi_cell_row && (len > 1))
{
int colspan;
colspan = len;
if(cell_boundary_bitmap)
for(i = 0; i < len; i ++)
if(i
&&
! (cell_boundary_bitmap[(x + i) / 8]
&
(1 << ((x + i) % 8))))
colspan --;
if(colspan > 1)
cur += sprintf(cur, " colspan=\"%d\"", colspan);
}
cur += sprintf(cur, ">");
cur += sprintf(cur, "<tt>");
for(i = 0; i < len; i++)
{
if(nonblank
&&
((! i)
||
(lineattr[x + i] != lineattr[x + i - 1])))
{
needfont = (caca_attr_to_ansi_fg(lineattr[x + i])
!=
CACA_DEFAULT);
if(needfont)
cur += sprintf(cur, "<font color=\"#%.06lx\">",
(unsigned long int)
_caca_attr_to_rgb24fg(lineattr[x + i]));
if(lineattr[x + i] & CACA_BOLD)
cur += sprintf(cur, "<b>");
if(lineattr[x + i] & CACA_ITALICS)
cur += sprintf(cur, "<i>");
if(lineattr[x + i] & CACA_UNDERLINE)
cur += sprintf(cur, "<u>");
if(lineattr[x + i] & CACA_BLINK)
cur += sprintf(cur, "<blink>");
}
if(linechar[x + i] == CACA_MAGIC_FULLWIDTH)
;
else if((linechar[x + i] <= 0x00000020)
||
((linechar[x + i] >= 0x0000007f)
&&
(linechar[x + i] <= 0x000000a0)))
{
/* Control characters and space converted to
* U+00A0 NO-BREAK SPACE, a.k.a. " " in HTML,
* but we use the equivalent numeric character
* reference   so this will work in plain
* XHTML with no DTD too. */
cur += sprintf(cur, " ");
}
else if(linechar[x + i] == '&')
cur += sprintf(cur, "&");
else if(linechar[x + i] == '<')
cur += sprintf(cur, "<");
else if(linechar[x + i] == '>')
cur += sprintf(cur, ">");
else if(linechar[x + i] == '\"')
cur += sprintf(cur, """);
else if(linechar[x + i] == '\'')
cur += sprintf(cur, "'");
else if(linechar[x + i] < 0x00000080)
cur += sprintf(cur, "%c", (uint8_t)linechar[x + i]);
else if((linechar[x + i] <= 0x0010fffd)
&&
((linechar[x + i] & 0x0000fffe) != 0x0000fffe)
&&
((linechar[x + i] < 0x0000d800)
||
(linechar[x + i] > 0x0000dfff)))
cur += sprintf(cur, "&#%i;", (unsigned int)linechar[x + i]);
else
/* non-character codepoints become U+FFFD
* REPLACEMENT CHARACTER */
cur += sprintf(cur, "&#%i;", (unsigned int)0x0000fffd);
if (nonblank
&&
(((i + 1) == len)
||
(lineattr[x + i + 1] != lineattr[x + i])))
{
if(lineattr[x + i] & CACA_BLINK)
cur += sprintf(cur, "</blink>");
if(lineattr[x + i] & CACA_UNDERLINE)
cur += sprintf(cur, "</u>");
if(lineattr[x + i] & CACA_ITALICS)
cur += sprintf(cur, "</i>");
if(lineattr[x + i] & CACA_BOLD)
cur += sprintf(cur, "</b>");
if(needfont)
cur += sprintf(cur, "</font>");
}
}
cur += sprintf(cur, "</tt>");
cur += sprintf(cur, "</td>");
}
cur += sprintf(cur, "</tr>\n");
}
/* Footer */
cur += sprintf(cur, "</table>\n");
/* Free working memory */
if (cell_boundary_bitmap)
free((void *) cell_boundary_bitmap);
/* Crop to really used size */
debug("html3 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;
}
static void *export_bbfr(caca_canvas_t const *cv, size_t *bytes)
{
char *data, *cur;
int x, y, len;
/* The font markup: less than 100 bytes
* A line: 1 char for "\n"
* A glyph: 22 chars for "[f=#xxxxxx][c=#xxxxxx]"
* up to 21 chars for "[g][i][s][/s][/i][/g]"
* up to 6 chars for the UTF-8 glyph
* 8 chars for "[/c][/f]" */
*bytes = 100 + cv->height * (1 + cv->width * (22 + 21 + 6 + 8));
cur = data = malloc(*bytes);
/* Table */
cur += sprintf(cur, "[font=Courier New]");
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 += len)
{
int i, needback, needfront;
/* Use colspan option to factor cells with same attributes
* (see below) */
len = 1;
if(linechar[x] == ' ')
while(x + len < cv->width && lineattr[x + len] == lineattr[x]
&& linechar[x] == ' ')
len++;
else
while(x + len < cv->width && lineattr[x + len] == lineattr[x]
&& linechar[x] != ' ')
len++;
needback = caca_attr_to_ansi_bg(lineattr[x]) < 0x10;
needfront = caca_attr_to_ansi_fg(lineattr[x]) < 0x10;
if(needback)
cur += sprintf(cur, "[f=#%.06lx]", (unsigned long int)
_caca_attr_to_rgb24bg(lineattr[x]));
if(linechar[x] == ' ')
cur += sprintf(cur, "[c=#%.06lx]", (unsigned long int)
_caca_attr_to_rgb24bg(lineattr[x]));
else if(needfront)
cur += sprintf(cur, "[c=#%.06lx]", (unsigned long int)
_caca_attr_to_rgb24fg(lineattr[x]));
if(lineattr[x] & CACA_BOLD)
cur += sprintf(cur, "[g]");
if(lineattr[x] & CACA_ITALICS)
cur += sprintf(cur, "[i]");
if(lineattr[x] & CACA_UNDERLINE)
cur += sprintf(cur, "[s]");
if(lineattr[x] & CACA_BLINK)
; /* FIXME */
for(i = 0; i < len; i++)
{
if(linechar[x + i] == CACA_MAGIC_FULLWIDTH)
;
else if(linechar[x + i] == ' ')
*cur++ = '_';
else
cur += caca_utf32_to_utf8(cur, linechar[x + i]);
}
if(lineattr[x] & CACA_BLINK)
; /* FIXME */
if(lineattr[x] & CACA_UNDERLINE)
cur += sprintf(cur, "[/s]");
if(lineattr[x] & CACA_ITALICS)
cur += sprintf(cur, "[/i]");
if(lineattr[x] & CACA_BOLD)
cur += sprintf(cur, "[/g]");
if(linechar[x] == ' ' || needfront)
cur += sprintf(cur, "[/c]");
if(needback)
cur += sprintf(cur, "[/f]");
}
cur += sprintf(cur, "\n");
}
/* Footer */
cur += sprintf(cur, "[/font]\n");
/* Crop to really used size */
debug("bbfr 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 PostScript document. */
static void *export_ps(caca_canvas_t const *cv, size_t *bytes)
{
static char const *ps_header =
"%!\n"
"%% libcaca PDF export\n"
"%%LanguageLevel: 2\n"
"%%Pages: 1\n"
"%%DocumentData: Clean7Bit\n"
"/csquare {\n"
" newpath\n"
" 0 0 moveto\n"
" 0 1 rlineto\n"
" 1 0 rlineto\n"
" 0 -1 rlineto\n"
" closepath\n"
" setrgbcolor\n"
" fill\n"
"} def\n"
"/S {\n"
" Show\n"
"} bind def\n"
"/Courier-Bold findfont\n"
"8 scalefont\n"
"setfont\n"
"gsave\n"
"6 10 scale\n";
char *data, *cur;
int x, y;
/* 200 is arbitrary but should be ok */
*bytes = strlen(ps_header) + 100 + cv->height * (32 + cv->width * 200);
cur = data = malloc(*bytes);
/* Header */
cur += sprintf(cur, "%s", ps_header);
cur += sprintf(cur, "0 %d translate\n", cv->height);
/* Background, drawn using csquare macro defined in header */
for(y = cv->height; y--; )
{
uint32_t *lineattr = cv->attrs + y * cv->width;
for(x = 0; x < cv->width; x++)
{
uint8_t argb[8];
caca_attr_to_argb64(*lineattr++, argb);
cur += sprintf(cur, "1 0 translate\n %f %f %f csquare\n",
(float)argb[1] * (1.0 / 0xf),
(float)argb[2] * (1.0 / 0xf),
(float)argb[3] * (1.0 / 0xf));
}
/* Return to beginning of the line, and jump to the next one */
cur += sprintf(cur, "-%d 1 translate\n", cv->width);
}
cur += sprintf(cur, "grestore\n"); /* Restore transformation matrix */
cur += sprintf(cur, "0 %d translate\n", cv->height*10);
for(y = cv->height; y--; )
{
uint32_t *lineattr = cv->attrs + (cv->height - y - 1) * cv->width;
uint32_t *linechar = cv->chars + (cv->height - y - 1) * cv->width;
for(x = 0; x < cv->width; x++)
{
uint8_t argb[8];
uint32_t ch = *linechar++;
caca_attr_to_argb64(*lineattr++, argb);
cur += sprintf(cur, "newpath\n");
cur += sprintf(cur, "%d %d moveto\n", (x + 1) * 6, y * 10 + 2);
cur += sprintf(cur, "%f %f %f setrgbcolor\n",
(float)argb[5] * (1.0 / 0xf),
(float)argb[6] * (1.0 / 0xf),
(float)argb[7] * (1.0 / 0xf));
if(ch < 0x00000020)
cur += sprintf(cur, "(?) show\n");
else if(ch >= 0x00000080)
cur += sprintf(cur, "(?) show\n");
else switch((uint8_t)(ch & 0x7f))
{
case '\\':
case '(':
case ')':
cur += sprintf(cur, "(\\%c) show\n", (uint8_t)ch);
break;
default:
cur += sprintf(cur, "(%c) show\n", (uint8_t)ch);
break;
}
}
}
cur += sprintf(cur, "showpage\n");
/* Crop to really used size */
debug("PS 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 an SVG vector image */
static void *export_svg(caca_canvas_t const *cv, size_t *bytes)
{
static char const svg_header[] =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<svg width=\"%d\" height=\"%d\" viewBox=\"0 0 %d %d\""
" xmlns=\"http://www.w3.org/2000/svg\""
" xmlns:xlink=\"http://www.w3.org/1999/xlink\""
" xml:space=\"preserve\" version=\"1.1\" baseProfile=\"full\">\n";
char *data, *cur;
int x, y;
/* 200 is arbitrary but should be ok */
*bytes = strlen(svg_header) + 128 + cv->width * cv->height * 200;
cur = data = malloc(*bytes);
/* Header */
cur += sprintf(cur, svg_header, cv->width * 6, cv->height * 10,
cv->width * 6, cv->height * 10);
cur += sprintf(cur, " <g id=\"mainlayer\" font-size=\"10\""
" style=\"font-family: monospace\">\n");
/* Background */
for(y = 0; y < cv->height; y++)
{
uint32_t *lineattr = cv->attrs + y * cv->width;
for(x = 0; x < cv->width; x++)
{
cur += sprintf(cur, "<rect style=\"fill:#%.03x\" x=\"%d\" y=\"%d\""
" width=\"6\" height=\"10\"/>\n",
caca_attr_to_rgb12_bg(*lineattr++),
x * 6, y * 10);
}
}
/* Text */
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++)
{
uint32_t ch = *linechar++;
if(ch == ' ' || ch == CACA_MAGIC_FULLWIDTH)
{
lineattr++;
continue;
}
cur += sprintf(cur, "<text style=\"fill:#%.03x\" "
"x=\"%d\" y=\"%d\">",
caca_attr_to_rgb12_fg(*lineattr++),
x * 6, (y * 10) + 8);
if(ch < 0x00000020)
*cur++ = '?';
else if(ch > 0x0000007f)
cur += caca_utf32_to_utf8(cur, ch);
else switch((uint8_t)ch)
{
case '>': cur += sprintf(cur, ">"); break;
case '<': cur += sprintf(cur, "<"); break;
case '&': cur += sprintf(cur, "&"); break;
default: *cur++ = (uint8_t)ch; break;
}
cur += sprintf(cur, "</text>\n");
}
}
cur += sprintf(cur, " </g>\n");
cur += sprintf(cur, "</svg>\n");
/* Crop to really used size */
debug("SVG 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 TGA image */
static void *export_tga(caca_canvas_t const *cv, size_t *bytes)
{
char const * const *fontlist;
char *data, *cur;
caca_font_t *f;
int i, w, h;
fontlist = caca_get_font_list();
if(!fontlist[0])
{
seterrno(EINVAL);
return NULL;
}
f = caca_load_font(fontlist[0], 0);
w = caca_get_canvas_width(cv) * caca_get_font_width(f);
h = caca_get_canvas_height(cv) * caca_get_font_height(f);
*bytes = w * h * 4 + 18; /* 32 bpp + 18 bytes for the header */
cur = data = malloc(*bytes);
/* ID Length */
cur += sprintf(cur, "%c", 0);
/* Color Map Type: no colormap */
cur += sprintf(cur, "%c", 0);
/* Image Type: uncompressed truecolor */
cur += sprintf(cur, "%c", 2);
/* Color Map Specification: no color map */
memset(cur, 0, 5); cur += 5;
/* Image Specification */
cur += sprintf(cur, "%c%c", 0, 0); /* X Origin */
cur += sprintf(cur, "%c%c", 0, 0); /* Y Origin */
cur += sprintf(cur, "%c%c", w & 0xff, w >> 8); /* Width */
cur += sprintf(cur, "%c%c", h & 0xff, h >> 8); /* Height */
cur += sprintf(cur, "%c", 32); /* Pixel Depth */
cur += sprintf(cur, "%c", 40); /* Image Descriptor */
/* Image ID: no ID */
/* Color Map Data: no colormap */
/* Image Data */
caca_render_canvas(cv, f, cur, w, h, 4 * w);
/* Swap bytes. What a waste of time. */
for(i = 0; i < w * h * 4; i += 4)
{
char c;
c = cur[i]; cur[i] = cur[i + 3]; cur[i + 3] = c;
c = cur[i + 1]; cur[i + 1] = cur[i + 2]; cur[i + 2] = c;
}
caca_free_font(f);
return data;
}
/*
* XXX: The following functions are aliases.
*/
void *cucul_export_memory(cucul_canvas_t const *, char const *,
size_t *) CACA_ALIAS(caca_export_canvas_to_memory);
void *caca_export_memory(caca_canvas_t const *, char const *,
size_t *) CACA_ALIAS(caca_export_canvas_to_memory);
char const * const * cucul_get_export_list(void)
CACA_ALIAS(caca_get_export_list);