cacalabs
/
libcaca
kopie van https://github.com/cacalabs/libcaca.git
1
0
Vork 0
Code Kwesties 0 Publicaties 7 Wiki Activiteit
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1294 Commits
1 Branch
4.9 MiB
 
 
 
 
 
 
Tree: 99b5396e8e
Branches Labels
${ item.name }
Maak branch ${ searchTerm }
van '99b5396e8e'
${ noResults }
libcaca/cucul/export.c

1021 regels
32 KiB
Ruw Blame Geschiedenis 

  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.  *  $Id$

  8.  *

  9.  *  This library is free software. It comes without any warranty, to

  10.  *  the extent permitted by applicable law. You can redistribute it

  11.  *  and/or modify it under the terms of the Do What The Fuck You Want

  12.  *  To Public License, Version 2, as published by Sam Hocevar. See

  13.  *  http://sam.zoy.org/wtfpl/COPYING for more details.

  14.  */

  15. 

  16. /*

  17.  *  This file contains various export functions

  18.  */

  19. 

  20. #include "config.h"

  21. 

  22. #if !defined(__KERNEL__)

  23. #   include <stdlib.h>

  24. #   include <stdio.h>

  25. #   include <string.h>

  26. #endif

  27. 

  28. #include "cucul.h"

  29. #include "cucul_internals.h"

  30. 

  31. static inline int sprintu32(char *s, uint32_t x)

  32. {

  33.     s[0] = (uint8_t)(x >> 24);

  34.     s[1] = (uint8_t)(x >> 16) & 0xff;

  35.     s[2] = (uint8_t)(x >>  8) & 0xff;

  36.     s[3] = (uint8_t)(x      ) & 0xff;

  37.     return 4;

  38. }

  39. 

  40. static inline int sprintu16(char *s, uint16_t x)

  41. {

  42.     s[0] = (uint8_t)(x >>  8) & 0xff;

  43.     s[1] = (uint8_t)(x      ) & 0xff;

  44.     return 2;

  45. }

  46. 

  47. static void *export_caca(cucul_canvas_t const *, unsigned long int *);

  48. static void *export_ansi(cucul_canvas_t const *, unsigned long int *);

  49. static void *export_utf8(cucul_canvas_t const *, unsigned long int *, int);

  50. static void *export_html(cucul_canvas_t const *, unsigned long int *);

  51. static void *export_html3(cucul_canvas_t const *, unsigned long int *);

  52. static void *export_bbfr(cucul_canvas_t const *, unsigned long int *);

  53. static void *export_irc(cucul_canvas_t const *, unsigned long int *);

  54. static void *export_ps(cucul_canvas_t const *, unsigned long int *);

  55. static void *export_svg(cucul_canvas_t const *, unsigned long int *);

  56. static void *export_tga(cucul_canvas_t const *, unsigned long int *);

  57. 

  58. /** \brief Export a canvas into a foreign format.

  59.  *

  60.  *  This function exports a libcucul canvas into various foreign formats such

  61.  *  as ANSI art, HTML, IRC colours, etc. The returned pointer should be passed

  62.  *  to free() to release the allocated storage when it is no longer needed.

  63.  *

  64.  *  Valid values for \c format are:

  65.  *  - \c "caca": export native libcaca files.

  66.  *  - \c "ansi": export ANSI art (CP437 charset with ANSI colour codes).

  67.  *  - \c "html": export an HTML page with CSS information.

  68.  *  - \c "html3": export an HTML table that should be compatible with

  69.  *    most navigators, including textmode ones.

  70.  *  - \c "irc": export UTF-8 text with mIRC colour codes.

  71.  *  - \c "ps": export a PostScript document.

  72.  *  - \c "svg": export an SVG vector image.

  73.  *  - \c "tga": export a TGA image.

  74.  *

  75.  *  If an error occurs, NULL is returned and \b errno is set accordingly:

  76.  *  - \c EINVAL Unsupported format requested.

  77.  *  - \c ENOMEM Not enough memory to allocate output buffer.

  78.  *

  79.  *  \param cv A libcucul canvas

  80.  *  \param format A string describing the requested output format.

  81.  *  \param bytes A pointer to an unsigned long integer where the number of

  82.  *         allocated bytes will be written.

  83.  *  \return A pointer to the exported memory area, or NULL in case of error.

  84.  */

  85. void *cucul_export_memory(cucul_canvas_t const *cv, char const *format,

  86.                           unsigned long int *bytes)

  87. {

  88.     if(!strcasecmp("caca", format))

  89.         return export_caca(cv, bytes);

  90. 

  91.     if(!strcasecmp("ansi", format))

  92.         return export_ansi(cv, bytes);

  93. 

  94.     if(!strcasecmp("utf8", format))

  95.         return export_utf8(cv, bytes, 0);

  96. 

  97.     if(!strcasecmp("utf8cr", format))

  98.         return export_utf8(cv, bytes, 1);

  99. 

  100.     if(!strcasecmp("html", format))

  101.         return export_html(cv, bytes);

  102. 

  103.     if(!strcasecmp("html3", format))

  104.         return export_html3(cv, bytes);

  105. 

  106.     if(!strcasecmp("bbfr", format))

  107.         return export_bbfr(cv, bytes);

  108. 

  109.     if(!strcasecmp("irc", format))

  110.         return export_irc(cv, bytes);

  111. 

  112.     if(!strcasecmp("ps", format))

  113.         return export_ps(cv, bytes);

  114. 

  115.     if(!strcasecmp("svg", format))

  116.         return export_svg(cv, bytes);

  117. 

  118.     if(!strcasecmp("tga", format))

  119.         return export_tga(cv, bytes);

  120. 

  121.     seterrno(EINVAL);

  122.     return NULL;

  123. }

  124. 

  125. /** \brief Get available export formats

  126.  *

  127.  *  Return a list of available export formats. The list is a NULL-terminated

  128.  *  array of strings, interleaving a string containing the internal value for

  129.  *  the export format, to be used with cucul_export_memory(), and a string

  130.  *  containing the natural language description for that export format.

  131.  *

  132.  *  This function never fails.

  133.  *

  134.  *  \return An array of strings.

  135.  */

  136. char const * const * cucul_get_export_list(void)

  137. {

  138.     static char const * const list[] =

  139.     {

  140.         "caca", "native libcaca format",

  141.         "ansi", "ANSI",

  142.         "utf8", "UTF-8 with ANSI escape codes",

  143.         "utf8cr", "UTF-8 with ANSI escape codes and MS-DOS \\r",

  144.         "html", "HTML",

  145.         "html3", "backwards-compatible HTML",

  146.         "bbfr", "BBCode (French)",

  147.         "irc", "IRC with mIRC colours",

  148.         "ps", "PostScript document",

  149.         "svg", "SVG vector image",

  150.         "tga", "TGA image",

  151.         NULL, NULL

  152.     };

  153. 

  154.     return list;

  155. }

  156. 

  157. /*

  158.  * XXX: the following functions are local.

  159.  */

  160. 

  161. /* Generate a native libcaca canvas file. */

  162. static void *export_caca(cucul_canvas_t const *cv, unsigned long int *bytes)

  163. {

  164.     char *data, *cur;

  165.     unsigned int f, n;

  166. 

  167.     /* 52 bytes for the header:

  168.      *  - 4 bytes for "\xCA\xCA" + "CV"

  169.      *  - 16 bytes for the canvas header

  170.      *  - 32 bytes for the frame info

  171.      * 8 bytes for each character cell */

  172.     *bytes = 20 + (32 + 8 * cv->width * cv->height) * cv->framecount;

  173.     cur = data = malloc(*bytes);

  174. 

  175.     /* magic */

  176.     cur += sprintf(cur, "%s", "\xCA\xCA" "CV");

  177. 

  178.     /* canvas_header */

  179.     cur += sprintu32(cur, 16 + 32 * cv->framecount);

  180.     cur += sprintu32(cur, cv->width * cv->height * 8 * cv->framecount);

  181.     cur += sprintu16(cur, 0x0001);

  182.     cur += sprintu32(cur, cv->framecount);

  183.     cur += sprintu16(cur, 0x0000);

  184. 

  185.     /* frame_info */

  186.     for(f = 0; f < cv->framecount; f++)

  187.     {

  188.         cur += sprintu32(cur, cv->width);

  189.         cur += sprintu32(cur, cv->height);

  190.         cur += sprintu32(cur, 0);

  191.         cur += sprintu32(cur, cv->curattr);

  192.         cur += sprintu32(cur, cv->frames[f].x);

  193.         cur += sprintu32(cur, cv->frames[f].y);

  194.         cur += sprintu32(cur, cv->frames[f].handlex);

  195.         cur += sprintu32(cur, cv->frames[f].handley);

  196.     }

  197. 

  198.     /* canvas_data */

  199.     for(f = 0; f < cv->framecount; f++)

  200.     {

  201.         uint32_t *attrs = cv->frames[f].attrs;

  202.         uint32_t *chars = cv->frames[f].chars;

  203. 

  204.         for(n = cv->height * cv->width; n--; )

  205.         {

  206.             cur += sprintu32(cur, *chars++);

  207.             cur += sprintu32(cur, *attrs++);

  208.         }

  209.     }

  210. 

  211.     return data;

  212. }

  213. 

  214. /* Generate UTF-8 representation of current canvas. */

  215. static void *export_utf8(cucul_canvas_t const *cv, unsigned long int *bytes,

  216.                          int cr)

  217. {

  218.     static uint8_t const palette[] =

  219.     {

  220.         0,  4,  2,  6, 1,  5,  3,  7,

  221.         8, 12, 10, 14, 9, 13, 11, 15

  222.     };

  223. 

  224.     char *data, *cur;

  225.     unsigned int x, y;

  226. 

  227.     /* 23 bytes assumed for max length per pixel ('\e[5;1;3x;4y;9x;10ym' plus

  228.      * 4 max bytes for a UTF-8 character).

  229.      * Add height*9 to that (zeroes color at the end and jump to next line) */

  230.     *bytes = (cv->height * 9) + (cv->width * cv->height * 23);

  231.     cur = data = malloc(*bytes);

  232. 

  233.     for(y = 0; y < cv->height; y++)

  234.     {

  235.         uint32_t *lineattr = cv->attrs + y * cv->width;

  236.         uint32_t *linechar = cv->chars + y * cv->width;

  237. 

  238.         uint8_t prevfg = 0x10;

  239.         uint8_t prevbg = 0x10;

  240. 

  241.         for(x = 0; x < cv->width; x++)

  242.         {

  243.             uint32_t attr = lineattr[x];

  244.             uint32_t ch = linechar[x];

  245.             uint8_t ansifg, ansibg, fg, bg;

  246. 

  247.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  248.                 continue;

  249. 

  250.             ansifg = cucul_attr_to_ansi_fg(attr);

  251.             ansibg = cucul_attr_to_ansi_bg(attr);

  252. 

  253.             fg = ansifg < 0x10 ? palette[ansifg] : 0x10;

  254.             bg = ansibg < 0x10 ? palette[ansibg] : 0x10;

  255. 

  256.             /* TODO: the [0 could be omitted in some cases */

  257.             if(fg != prevfg || bg != prevbg)

  258.             {

  259.                 cur += sprintf(cur, "\033[0");

  260. 

  261.                 if(fg < 8)

  262.                     cur += sprintf(cur, ";3%d", fg);

  263.                 else if(fg < 16)

  264.                     cur += sprintf(cur, ";1;3%d;9%d", fg - 8, fg - 8);

  265. 

  266.                 if(bg < 8)

  267.                     cur += sprintf(cur, ";4%d", bg);

  268.                 else if(bg < 16)

  269.                     cur += sprintf(cur, ";5;4%d;10%d", bg - 8, bg - 8);

  270. 

  271.                 cur += sprintf(cur, "m");

  272.             }

  273. 

  274.             cur += cucul_utf32_to_utf8(cur, ch);

  275. 

  276.             prevfg = fg;

  277.             prevbg = bg;

  278.         }

  279. 

  280.         if(prevfg != 0x10 || prevbg != 0x10)

  281.             cur += sprintf(cur, "\033[0m");

  282. 

  283.         cur += sprintf(cur, cr ? "\r\n" : "\n");

  284.     }

  285. 

  286.     /* Crop to really used size */

  287.     debug("utf8 export: alloc %lu bytes, realloc %lu",

  288.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  289.     *bytes = (uintptr_t)(cur - data);

  290.     data = realloc(data, *bytes);

  291. 

  292.     return data;

  293. }

  294. 

  295. /* Generate ANSI representation of current canvas. */

  296. static void *export_ansi(cucul_canvas_t const *cv, unsigned long int *bytes)

  297. {

  298.     static uint8_t const palette[] =

  299.     {

  300.         0,  4,  2,  6, 1,  5,  3,  7,

  301.         8, 12, 10, 14, 9, 13, 11, 15

  302.     };

  303. 

  304.     char *data, *cur;

  305.     unsigned int x, y;

  306. 

  307.     uint8_t prevfg = -1;

  308.     uint8_t prevbg = -1;

  309. 

  310.     /* 16 bytes assumed for max length per pixel ('\e[5;1;3x;4ym' plus

  311.      * 1 byte for a CP437 character).

  312.      * Add height*9 to that (zeroes color at the end and jump to next line) */

  313.     *bytes = (cv->height * 9) + (cv->width * cv->height * 16);

  314.     cur = data = malloc(*bytes);

  315. 

  316.     for(y = 0; y < cv->height; y++)

  317.     {

  318.         uint32_t *lineattr = cv->attrs + y * cv->width;

  319.         uint32_t *linechar = cv->chars + y * cv->width;

  320. 

  321.         for(x = 0; x < cv->width; x++)

  322.         {

  323.             uint8_t ansifg = cucul_attr_to_ansi_fg(lineattr[x]);

  324.             uint8_t ansibg = cucul_attr_to_ansi_bg(lineattr[x]);

  325.             uint8_t fg = ansifg < 0x10 ? palette[ansifg] : CUCUL_LIGHTGRAY;

  326.             uint8_t bg = ansibg < 0x10 ? palette[ansibg] : CUCUL_BLACK;

  327.             uint32_t ch = linechar[x];

  328. 

  329.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  330.                 ch = '?';

  331. 

  332.             if(fg != prevfg || bg != prevbg)

  333.             {

  334.                 cur += sprintf(cur, "\033[0;");

  335. 

  336.                 if(fg < 8)

  337.                     if(bg < 8)

  338.                         cur += sprintf(cur, "3%d;4%dm", fg, bg);

  339.                     else

  340.                         cur += sprintf(cur, "5;3%d;4%dm", fg, bg - 8);

  341.                 else

  342.                     if(bg < 8)

  343.                         cur += sprintf(cur, "1;3%d;4%dm", fg - 8, bg);

  344.                     else

  345.                         cur += sprintf(cur, "5;1;3%d;4%dm", fg - 8, bg - 8);

  346.             }

  347. 

  348.             *cur++ = cucul_utf32_to_cp437(ch);

  349. 

  350.             prevfg = fg;

  351.             prevbg = bg;

  352.         }

  353. 

  354.         if(cv->width == 80)

  355.         {

  356.             cur += sprintf(cur, "\033[s\n\033[u");

  357.         }

  358.         else

  359.         {

  360.             cur += sprintf(cur, "\033[0m\r\n");

  361.             prevfg = -1;

  362.             prevbg = -1;

  363.         }

  364.     }

  365. 

  366.     /* Crop to really used size */

  367.     debug("ansi export: alloc %lu bytes, realloc %lu",

  368.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  369.     *bytes = (uintptr_t)(cur - data);

  370.     data = realloc(data, *bytes);

  371. 

  372.     return data;

  373. }

  374. 

  375. /* Generate HTML representation of current canvas. */

  376. static void *export_html(cucul_canvas_t const *cv, unsigned long int *bytes)

  377. {

  378.     char *data, *cur;

  379.     unsigned int x, y, len;

  380. 

  381.     /* The HTML header: less than 1000 bytes

  382.      * A line: 7 chars for "<br />\n"

  383.      * A glyph: 47 chars for "<span style="color:#xxx;background-color:#xxx">"

  384.      *          83 chars for ";font-weight..."

  385.      *          up to 9 chars for "&#xxxxxx;", far less for pure ASCII

  386.      *          7 chars for "</span>" */

  387.     *bytes = 1000 + cv->height * (7 + cv->width * (47 + 83 + 9 + 7));

  388.     cur = data = malloc(*bytes);

  389. 

  390.     /* HTML header */

  391.     cur += sprintf(cur, "<html><head>\n");

  392.     cur += sprintf(cur, "<title>Generated by libcaca %s</title>\n",

  393.                         cucul_get_version());

  394.     cur += sprintf(cur, "</head><body>\n");

  395. 

  396.     cur += sprintf(cur, "<div cellpadding='0' cellspacing='0' style='%s'>\n",

  397.                         "font-family: monospace, fixed; font-weight: bold;");

  398. 

  399.     for(y = 0; y < cv->height; y++)

  400.     {

  401.         uint32_t *lineattr = cv->attrs + y * cv->width;

  402.         uint32_t *linechar = cv->chars + y * cv->width;

  403. 

  404.         for(x = 0; x < cv->width; x += len)

  405.         {

  406.             cur += sprintf(cur, "<span style=\"");

  407.             if(cucul_attr_to_ansi_fg(lineattr[x]) < 0x10)

  408.                 cur += sprintf(cur, ";color:#%.03x",

  409.                                cucul_attr_to_rgb12_fg(lineattr[x]));

  410.             if(cucul_attr_to_ansi_bg(lineattr[x]) < 0x10)

  411.                 cur += sprintf(cur, ";background-color:#%.03x",

  412.                                cucul_attr_to_rgb12_bg(lineattr[x]));

  413.             if(lineattr[x] & CUCUL_BOLD)

  414.                 cur += sprintf(cur, ";font-weight:bold");

  415.             if(lineattr[x] & CUCUL_ITALICS)

  416.                 cur += sprintf(cur, ";font-style:italic");

  417.             if(lineattr[x] & CUCUL_UNDERLINE)

  418.                 cur += sprintf(cur, ";text-decoration:underline");

  419.             if(lineattr[x] & CUCUL_BLINK)

  420.                 cur += sprintf(cur, ";text-decoration:blink");

  421.             cur += sprintf(cur, "\">");

  422. 

  423.             for(len = 0;

  424.                 x + len < cv->width && lineattr[x + len] == lineattr[x];

  425.                 len++)

  426.             {

  427.                 if(linechar[x + len] == CUCUL_MAGIC_FULLWIDTH)

  428.                     ;

  429.                 else if(linechar[x + len] <= 0x00000020)

  430.                     cur += sprintf(cur, "&nbsp;");

  431.                 else if(linechar[x + len] < 0x00000080)

  432.                     cur += sprintf(cur, "%c",

  433.                                    (unsigned char)linechar[x + len]);

  434.                 else

  435.                     cur += sprintf(cur, "&#%i;",

  436.                                    (unsigned int)linechar[x + len]);

  437.             }

  438.             cur += sprintf(cur, "</span>");

  439.         }

  440.         /* New line */

  441.         cur += sprintf(cur, "<br />\n");

  442.     }

  443. 

  444.     cur += sprintf(cur, "</div></body></html>\n");

  445. 

  446.     /* Crop to really used size */

  447.     debug("html export: alloc %lu bytes, realloc %lu",

  448.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  449.     *bytes = (uintptr_t)(cur - data);

  450.     data = realloc(data, *bytes);

  451. 

  452.     return data;

  453. }

  454. 

  455. /* Export an HTML3 document. This function is way bigger than export_html(),

  456.  * but permits viewing in old browsers (or limited ones such as links). It

  457.  * will not work under gecko (mozilla rendering engine) unless you set a

  458.  * correct header. */

  459. static void *export_html3(cucul_canvas_t const *cv, unsigned long int *bytes)

  460. {

  461.     char *data, *cur;

  462.     unsigned int x, y, len;

  463. 

  464.     /* The HTML table markup: less than 1000 bytes

  465.      * A line: 10 chars for "<tr></tr>\n"

  466.      * A glyph: 40 chars for "<td bgcolor=#xxxxxx><font color=#xxxxxx>"

  467.      *          up to 36 chars for "<b><i><u><blink></blink></u></i></b>"

  468.      *          up to 9 chars for "&#xxxxxx;", far less for pure ASCII

  469.      *          12 chars for "</font></td>" */

  470.     *bytes = 1000 + cv->height * (10 + cv->width * (40 + 36 + 9 + 12));

  471.     cur = data = malloc(*bytes);

  472. 

  473.     /* Table */

  474.     cur += sprintf(cur, "<table cols='%d' cellpadding='0' cellspacing='0'>\n",

  475.                         cv->height);

  476. 

  477.     for(y = 0; y < cv->height; y++)

  478.     {

  479.         uint32_t *lineattr = cv->attrs + y * cv->width;

  480.         uint32_t *linechar = cv->chars + y * cv->width;

  481. 

  482.         cur += sprintf(cur, "<tr>");

  483. 

  484.         for(x = 0; x < cv->width; x += len)

  485.         {

  486.             unsigned int i, needfont;

  487. 

  488.             /* Use colspan option to factor cells with same attributes

  489.              * (see below) */

  490.             len = 1;

  491.             while(x + len < cv->width && lineattr[x + len] == lineattr[x])

  492.                 len++;

  493. 

  494.             cur += sprintf(cur, "<td");

  495. 

  496.             if(cucul_attr_to_ansi_fg(lineattr[x]) < 0x10)

  497.                 cur += sprintf(cur, " bgcolor=#%.06lx", (unsigned long int)

  498.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  499. 

  500.             if(len > 1)

  501.                 cur += sprintf(cur, " colspan=%d", len);

  502. 

  503.             cur += sprintf(cur, ">");

  504. 

  505.             needfont = cucul_attr_to_ansi_bg(lineattr[x]) < 0x10;

  506. 

  507.             if(needfont)

  508.                 cur += sprintf(cur, "<font color=#%.06lx>", (unsigned long int)

  509.                                _cucul_attr_to_rgb24fg(lineattr[x]));

  510. 

  511.             if(lineattr[x] & CUCUL_BOLD)

  512.                 cur += sprintf(cur, "<b>");

  513.             if(lineattr[x] & CUCUL_ITALICS)

  514.                 cur += sprintf(cur, "<i>");

  515.             if(lineattr[x] & CUCUL_UNDERLINE)

  516.                 cur += sprintf(cur, "<u>");

  517.             if(lineattr[x] & CUCUL_BLINK)

  518.                 cur += sprintf(cur, "<blink>");

  519. 

  520.             for(i = 0; i < len; i++)

  521.             {

  522.                 if(linechar[x + i] == CUCUL_MAGIC_FULLWIDTH)

  523.                     ;

  524.                 else if(linechar[x + i] <= 0x00000020)

  525.                     cur += sprintf(cur, "&nbsp;");

  526.                 else if(linechar[x + i] < 0x00000080)

  527.                     cur += sprintf(cur, "%c", (unsigned char)linechar[x + i]);

  528.                 else

  529.                     cur += sprintf(cur, "&#%i;", (unsigned int)linechar[x + i]);

  530.             }

  531. 

  532.             if(lineattr[x] & CUCUL_BLINK)

  533.                 cur += sprintf(cur, "</blink>");

  534.             if(lineattr[x] & CUCUL_UNDERLINE)

  535.                 cur += sprintf(cur, "</u>");

  536.             if(lineattr[x] & CUCUL_ITALICS)

  537.                 cur += sprintf(cur, "</i>");

  538.             if(lineattr[x] & CUCUL_BOLD)

  539.                 cur += sprintf(cur, "</b>");

  540. 

  541.             if(needfont)

  542.                 cur += sprintf(cur, "</font>");

  543.             cur += sprintf(cur, "</td>");

  544.         }

  545.         cur += sprintf(cur, "</tr>\n");

  546.     }

  547. 

  548.     /* Footer */

  549.     cur += sprintf(cur, "</table>\n");

  550. 

  551.     /* Crop to really used size */

  552.     debug("html3 export: alloc %lu bytes, realloc %lu",

  553.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  554.     *bytes = (uintptr_t)(cur - data);

  555.     data = realloc(data, *bytes);

  556. 

  557.     return data;

  558. }

  559. 

  560. static void *export_bbfr(cucul_canvas_t const *cv, unsigned long int *bytes)

  561. {

  562.     char *data, *cur;

  563.     unsigned int x, y, len;

  564. 

  565.     /* The font markup: less than 100 bytes

  566.      * A line: 1 char for "\n"

  567.      * A glyph: 22 chars for "[f=#xxxxxx][c=#xxxxxx]"

  568.      *          up to 21 chars for "[g][i][s][/s][/i][/g]"

  569.      *          up to 6 chars for the UTF-8 glyph

  570.      *          8 chars for "[/c][/f]" */

  571.     *bytes = 100 + cv->height * (1 + cv->width * (22 + 21 + 6 + 8));

  572.     cur = data = malloc(*bytes);

  573. 

  574.     /* Table */

  575.     cur += sprintf(cur, "[font=Courier New]");

  576. 

  577.     for(y = 0; y < cv->height; y++)

  578.     {

  579.         uint32_t *lineattr = cv->attrs + y * cv->width;

  580.         uint32_t *linechar = cv->chars + y * cv->width;

  581. 

  582.         for(x = 0; x < cv->width; x += len)

  583.         {

  584.             unsigned int i, needback, needfront;

  585. 

  586.             /* Use colspan option to factor cells with same attributes

  587.              * (see below) */

  588.             len = 1;

  589.             if(linechar[x] == ' ')

  590.                 while(x + len < cv->width && lineattr[x + len] == lineattr[x]

  591.                         && linechar[x] == ' ')

  592.                     len++;

  593.             else

  594.                 while(x + len < cv->width && lineattr[x + len] == lineattr[x]

  595.                         && linechar[x] != ' ')

  596.                     len++;

  597. 

  598.             needback = cucul_attr_to_ansi_bg(lineattr[x]) < 0x10;

  599.             needfront = cucul_attr_to_ansi_fg(lineattr[x]) < 0x10;

  600. 

  601.             if(needback)

  602.                 cur += sprintf(cur, "[f=#%.06lx]", (unsigned long int)

  603.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  604. 

  605.             if(linechar[x] == ' ')

  606.                 cur += sprintf(cur, "[c=#%.06lx]", (unsigned long int)

  607.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  608.             else if(needfront)

  609.                 cur += sprintf(cur, "[c=#%.06lx]", (unsigned long int)

  610.                                _cucul_attr_to_rgb24fg(lineattr[x]));

  611. 

  612.             if(lineattr[x] & CUCUL_BOLD)

  613.                 cur += sprintf(cur, "[g]");

  614.             if(lineattr[x] & CUCUL_ITALICS)

  615.                 cur += sprintf(cur, "[i]");

  616.             if(lineattr[x] & CUCUL_UNDERLINE)

  617.                 cur += sprintf(cur, "[s]");

  618.             if(lineattr[x] & CUCUL_BLINK)

  619.                 ; /* FIXME */

  620. 

  621.             for(i = 0; i < len; i++)

  622.             {

  623.                 if(linechar[x + i] == CUCUL_MAGIC_FULLWIDTH)

  624.                     ;

  625.                 else if(linechar[x + i] == ' ')

  626.                     *cur++ = '_';

  627.                 else

  628.                     cur += cucul_utf32_to_utf8(cur, linechar[x + i]);

  629.             }

  630. 

  631.             if(lineattr[x] & CUCUL_BLINK)

  632.                 ; /* FIXME */

  633.             if(lineattr[x] & CUCUL_UNDERLINE)

  634.                 cur += sprintf(cur, "[/s]");

  635.             if(lineattr[x] & CUCUL_ITALICS)

  636.                 cur += sprintf(cur, "[/i]");

  637.             if(lineattr[x] & CUCUL_BOLD)

  638.                 cur += sprintf(cur, "[/g]");

  639. 

  640.             if(linechar[x] == ' ' || needfront)

  641.                 cur += sprintf(cur, "[/c]");

  642.             if(needback)

  643.                 cur += sprintf(cur, "[/f]");

  644.         }

  645.         cur += sprintf(cur, "\n");

  646.     }

  647. 

  648.     /* Footer */

  649.     cur += sprintf(cur, "[/font]\n");

  650. 

  651.     /* Crop to really used size */

  652.     debug("bbfr export: alloc %lu bytes, realloc %lu",

  653.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  654.     *bytes = (uintptr_t)(cur - data);

  655.     data = realloc(data, *bytes);

  656. 

  657.     return data;

  658. }

  659. 

  660. /* Export a text file with IRC colours */

  661. static void *export_irc(cucul_canvas_t const *cv, unsigned long int *bytes)

  662. {

  663.     static uint8_t const palette[] =

  664.     {

  665.         1, 2, 3, 10, 5, 6, 7, 15, /* Dark */

  666.         14, 12, 9, 11, 4, 13, 8, 0, /* Light */

  667.     };

  668. 

  669.     char *data, *cur;

  670.     unsigned int x, y;

  671. 

  672.     /* 14 bytes assumed for max length per pixel. Worst case scenario:

  673.      * ^Cxx,yy   6 bytes

  674.      * ^B^B      2 bytes

  675.      * ch        6 bytes

  676.      * 3 bytes for max length per line. Worst case scenario:

  677.      * <spc>     1 byte (for empty lines)

  678.      * \r\n      2 bytes

  679.      * In real life, the average bytes per pixel value will be around 5.

  680.      */

  681. 

  682.     *bytes = 2 + cv->height * (3 + cv->width * 14);

  683.     cur = data = malloc(*bytes);

  684. 

  685.     for(y = 0; y < cv->height; y++)

  686.     {

  687.         uint32_t *lineattr = cv->attrs + y * cv->width;

  688.         uint32_t *linechar = cv->chars + y * cv->width;

  689. 

  690.         uint8_t prevfg = 0x10;

  691.         uint8_t prevbg = 0x10;

  692. 

  693.         for(x = 0; x < cv->width; x++)

  694.         {

  695.             uint32_t attr = lineattr[x];

  696.             uint32_t ch = linechar[x];

  697.             uint8_t ansifg, ansibg, fg, bg;

  698. 

  699.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  700.                 continue;

  701. 

  702.             ansifg = cucul_attr_to_ansi_fg(attr);

  703.             ansibg = cucul_attr_to_ansi_bg(attr);

  704. 

  705.             fg = ansifg < 0x10 ? palette[ansifg] : 0x10;

  706.             bg = ansibg < 0x10 ? palette[ansibg] : 0x10;

  707. 

  708.             /* TODO: optimise series of same fg / same bg

  709.              *       don't change fg value if ch == ' '

  710.              *       make sure the \x03,%d trick works everywhere */

  711.             if(bg != prevbg || fg != prevfg)

  712.             {

  713.                 int need_escape = 0;

  714. 

  715.                 if(bg == 0x10)

  716.                 {

  717.                     if(fg == 0x10)

  718.                         cur += sprintf(cur, "\x0f");

  719.                     else

  720.                     {

  721.                         if(prevbg == 0x10)

  722.                             cur += sprintf(cur, "\x03%d", fg);

  723.                         else

  724.                             cur += sprintf(cur, "\x0f\x03%d", fg);

  725. 

  726.                         if(ch == (uint32_t)',')

  727.                             need_escape = 1;

  728.                     }

  729.                 }

  730.                 else

  731.                 {

  732.                     if(fg == 0x10)

  733.                         cur += sprintf(cur, "\x0f\x03,%d", bg);

  734.                     else

  735.                         cur += sprintf(cur, "\x03%d,%d", fg, bg);

  736.                 }

  737. 

  738.                 if(ch >= (uint32_t)'0' && ch <= (uint32_t)'9')

  739.                     need_escape = 1;

  740. 

  741.                 if(need_escape)

  742.                     cur += sprintf(cur, "\x02\x02");

  743.             }

  744. 

  745.             cur += cucul_utf32_to_utf8(cur, ch);

  746.             prevfg = fg;

  747.             prevbg = bg;

  748.         }

  749. 

  750.         /* TODO: do the same the day we optimise whole lines above */

  751.         if(!cv->width)

  752.             *cur++ = ' ';

  753. 

  754.         *cur++ = '\r';

  755.         *cur++ = '\n';

  756.     }

  757. 

  758.     /* Crop to really used size */

  759.     debug("IRC export: alloc %lu bytes, realloc %lu",

  760.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  761.     *bytes = (uintptr_t)(cur - data);

  762.     data = realloc(data, *bytes);

  763. 

  764.     return data;

  765. }

  766. 

  767. /* Export a PostScript document. */

  768. static void *export_ps(cucul_canvas_t const *cv, unsigned long int *bytes)

  769. {

  770.     static char const *ps_header =

  771.         "%!\n"

  772.         "%% libcaca PDF export\n"

  773.         "%%LanguageLevel: 2\n"

  774.         "%%Pages: 1\n"

  775.         "%%DocumentData: Clean7Bit\n"

  776.         "/csquare {\n"

  777.         "  newpath\n"

  778.         "  0 0 moveto\n"

  779.         "  0 1 rlineto\n"

  780.         "  1 0 rlineto\n"

  781.         "  0 -1 rlineto\n"

  782.         "  closepath\n"

  783.         "  setrgbcolor\n"

  784.         "  fill\n"

  785.         "} def\n"

  786.         "/S {\n"

  787.         "  Show\n"

  788.         "} bind def\n"

  789.         "/Courier-Bold findfont\n"

  790.         "8 scalefont\n"

  791.         "setfont\n"

  792.         "gsave\n"

  793.         "6 10 scale\n";

  794. 

  795.     char *data, *cur;

  796.     unsigned int x, y;

  797. 

  798.     /* 200 is arbitrary but should be ok */

  799.     *bytes = strlen(ps_header) + 100 + cv->height * (32 + cv->width * 200);

  800.     cur = data = malloc(*bytes);

  801. 

  802.     /* Header */

  803.     cur += sprintf(cur, "%s", ps_header);

  804.     cur += sprintf(cur, "0 %d translate\n", cv->height);

  805. 

  806.     /* Background, drawn using csquare macro defined in header */

  807.     for(y = cv->height; y--; )

  808.     {

  809.         uint32_t *lineattr = cv->attrs + y * cv->width;

  810. 

  811.         for(x = 0; x < cv->width; x++)

  812.         {

  813.             uint8_t argb[8];

  814.             cucul_attr_to_argb64(*lineattr++, argb);

  815.             cur += sprintf(cur, "1 0 translate\n %f %f %f csquare\n",

  816.                            (float)argb[1] * (1.0 / 0xf),

  817.                            (float)argb[2] * (1.0 / 0xf),

  818.                            (float)argb[3] * (1.0 / 0xf));

  819.         }

  820. 

  821.         /* Return to beginning of the line, and jump to the next one */

  822.         cur += sprintf(cur, "-%d 1 translate\n", cv->width);

  823.     }

  824. 

  825.     cur += sprintf(cur, "grestore\n"); /* Restore transformation matrix */

  826.     cur += sprintf(cur, "0 %d translate\n", cv->height*10);

  827. 

  828.     for(y = cv->height; y--; )

  829.     {

  830.         uint32_t *lineattr = cv->attrs + (cv->height - y - 1) * cv->width;

  831.         uint32_t *linechar = cv->chars + (cv->height - y - 1) * cv->width;

  832. 

  833.         for(x = 0; x < cv->width; x++)

  834.         {

  835.             uint8_t argb[8];

  836.             uint32_t ch = *linechar++;

  837. 

  838.             cucul_attr_to_argb64(*lineattr++, argb);

  839. 

  840.             cur += sprintf(cur, "newpath\n");

  841.             cur += sprintf(cur, "%d %d moveto\n", (x + 1) * 6, y * 10 + 2);

  842.             cur += sprintf(cur, "%f %f %f setrgbcolor\n",

  843.                            (float)argb[5] * (1.0 / 0xf),

  844.                            (float)argb[6] * (1.0 / 0xf),

  845.                            (float)argb[7] * (1.0 / 0xf));

  846. 

  847.             if(ch < 0x00000020)

  848.                 cur += sprintf(cur, "(?) show\n");

  849.             else if(ch >= 0x00000080)

  850.                 cur += sprintf(cur, "(?) show\n");

  851.             else switch((uint8_t)(ch & 0x7f))

  852.             {

  853.                 case '\\':

  854.                 case '(':

  855.                 case ')':

  856.                     cur += sprintf(cur, "(\\%c) show\n", (unsigned char)ch);

  857.                     break;

  858.                 default:

  859.                     cur += sprintf(cur, "(%c) show\n", (unsigned char)ch);

  860.                     break;

  861.             }

  862.         }

  863.     }

  864. 

  865.     cur += sprintf(cur, "showpage\n");

  866. 

  867.     /* Crop to really used size */

  868.     debug("PS export: alloc %lu bytes, realloc %lu",

  869.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  870.     *bytes = (uintptr_t)(cur - data);

  871.     data = realloc(data, *bytes);

  872. 

  873.     return data;

  874. }

  875. 

  876. /* Export an SVG vector image */

  877. static void *export_svg(cucul_canvas_t const *cv, unsigned long int *bytes)

  878. {

  879.     static char const svg_header[] =

  880.         "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"

  881.         "<svg width=\"%d\" height=\"%d\" viewBox=\"0 0 %d %d\""

  882.         " xmlns=\"http://www.w3.org/2000/svg\""

  883.         " xmlns:xlink=\"http://www.w3.org/1999/xlink\""

  884.         " xml:space=\"preserve\" version=\"1.1\"  baseProfile=\"full\">\n";

  885. 

  886.     char *data, *cur;

  887.     unsigned int x, y;

  888. 

  889.     /* 200 is arbitrary but should be ok */

  890.     *bytes = strlen(svg_header) + 128 + cv->width * cv->height * 200;

  891.     cur = data = malloc(*bytes);

  892. 

  893.     /* Header */

  894.     cur += sprintf(cur, svg_header, cv->width * 6, cv->height * 10,

  895.                                     cv->width * 6, cv->height * 10);

  896. 

  897.     cur += sprintf(cur, " <g id=\"mainlayer\" font-size=\"10\""

  898.                         " style=\"font-family: monospace\">\n");

  899. 

  900.     /* Background */

  901.     for(y = 0; y < cv->height; y++)

  902.     {

  903.         uint32_t *lineattr = cv->attrs + y * cv->width;

  904. 

  905.         for(x = 0; x < cv->width; x++)

  906.         {

  907.             cur += sprintf(cur, "<rect style=\"fill:#%.03x\" x=\"%d\" y=\"%d\""

  908.                                 " width=\"6\" height=\"10\"/>\n",

  909.                                 cucul_attr_to_rgb12_bg(*lineattr++),

  910.                                 x * 6, y * 10);

  911.         }

  912.     }

  913. 

  914.     /* Text */

  915.     for(y = 0; y < cv->height; y++)

  916.     {

  917.         uint32_t *lineattr = cv->attrs + y * cv->width;

  918.         uint32_t *linechar = cv->chars + y * cv->width;

  919. 

  920.         for(x = 0; x < cv->width; x++)

  921.         {

  922.             uint32_t ch = *linechar++;

  923. 

  924.             if(ch == ' ' || ch == CUCUL_MAGIC_FULLWIDTH)

  925.             {

  926.                 lineattr++;

  927.                 continue;

  928.             }

  929. 

  930.             cur += sprintf(cur, "<text style=\"fill:#%.03x\" "

  931.                                 "x=\"%d\" y=\"%d\">",

  932.                                 cucul_attr_to_rgb12_fg(*lineattr++),

  933.                                 x * 6, (y * 10) + 8);

  934. 

  935.             if(ch < 0x00000020)

  936.                 *cur++ = '?';

  937.             else if(ch > 0x0000007f)

  938.                 cur += cucul_utf32_to_utf8(cur, ch);

  939.             else switch((uint8_t)ch)

  940.             {

  941.                 case '>': cur += sprintf(cur, "&gt;"); break;

  942.                 case '<': cur += sprintf(cur, "&lt;"); break;

  943.                 case '&': cur += sprintf(cur, "&amp;"); break;

  944.                 default: *cur++ = ch; break;

  945.             }

  946.             cur += sprintf(cur, "</text>\n");

  947.         }

  948.     }

  949. 

  950.     cur += sprintf(cur, " </g>\n");

  951.     cur += sprintf(cur, "</svg>\n");

  952. 

  953.     /* Crop to really used size */

  954.     debug("SVG export: alloc %lu bytes, realloc %lu",

  955.           (unsigned long int)*bytes, (unsigned long int)(cur - data));

  956.     *bytes = (uintptr_t)(cur - data);

  957.     data = realloc(data, *bytes);

  958. 

  959.     return data;

  960. }

  961. 

  962. /* Export a TGA image */

  963. static void *export_tga(cucul_canvas_t const *cv, unsigned long int *bytes)

  964. {

  965.     char const * const *fontlist;

  966.     char *data, *cur;

  967.     cucul_font_t *f;

  968.     unsigned int i, w, h;

  969. 

  970.     fontlist = cucul_get_font_list();

  971.     if(!fontlist[0])

  972.     {

  973.         seterrno(EINVAL);

  974.         return NULL;

  975.     }

  976. 

  977.     f = cucul_load_font(fontlist[0], 0);

  978. 

  979.     w = cucul_get_canvas_width(cv) * cucul_get_font_width(f);

  980.     h = cucul_get_canvas_height(cv) * cucul_get_font_height(f);

  981. 

  982.     *bytes = w * h * 4 + 18; /* 32 bpp + 18 bytes for the header */

  983.     cur = data = malloc(*bytes);

  984. 

  985.     /* ID Length */

  986.     cur += sprintf(cur, "%c", 0);

  987.     /* Color Map Type: no colormap */

  988.     cur += sprintf(cur, "%c", 0);

  989.     /* Image Type: uncompressed truecolor */

  990.     cur += sprintf(cur, "%c", 2);

  991.     /* Color Map Specification: no color map */

  992.     memset(cur, 0, 5); cur += 5;

  993. 

  994.     /* Image Specification */

  995.     cur += sprintf(cur, "%c%c", 0, 0); /* X Origin */

  996.     cur += sprintf(cur, "%c%c", 0, 0); /* Y Origin */

  997.     cur += sprintf(cur, "%c%c", w & 0xff, w >> 8); /* Width */

  998.     cur += sprintf(cur, "%c%c", h & 0xff, h >> 8); /* Height */

  999.     cur += sprintf(cur, "%c", 32); /* Pixel Depth */

  1000.     cur += sprintf(cur, "%c", 40); /* Image Descriptor */

  1001. 

  1002.     /* Image ID: no ID */

  1003.     /* Color Map Data: no colormap */

  1004. 

  1005.     /* Image Data */

  1006.     cucul_render_canvas(cv, f, cur, w, h, 4 * w);

  1007. 

  1008.     /* Swap bytes. What a waste of time. */

  1009.     for(i = 0; i < w * h * 4; i += 4)

  1010.     {

  1011.         char c;

  1012.         c = cur[i]; cur[i] = cur[i + 3]; cur[i + 3] = c;

  1013.         c = cur[i + 1]; cur[i + 1] = cur[i + 2]; cur[i + 2] = c;

  1014.     }

  1015. 

  1016.     cucul_free_font(f);

  1017. 

  1018.     return data;

  1019. }