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libcaca/cucul/export.c

1020 wiersze
32 KiB
Czysty Wina Historia 

  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 *, size_t *);

  48. static void *export_ansi(cucul_canvas_t const *, size_t *);

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

  50. static void *export_html(cucul_canvas_t const *, size_t *);

  51. static void *export_html3(cucul_canvas_t const *, size_t *);

  52. static void *export_bbfr(cucul_canvas_t const *, size_t *);

  53. static void *export_irc(cucul_canvas_t const *, size_t *);

  54. static void *export_ps(cucul_canvas_t const *, size_t *);

  55. static void *export_svg(cucul_canvas_t const *, size_t *);

  56. static void *export_tga(cucul_canvas_t const *, size_t *);

  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 a size_t where the number of allocated bytes

  82.  *         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.                           size_t *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, size_t *bytes)

  163. {

  164.     char *data, *cur;

  165.     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, size_t *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.     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, size_t *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.     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, size_t *bytes)

  377. {

  378.     char *data, *cur;

  379.     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", (uint8_t)linechar[x + len]);

  433.                 else

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

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

  436.             }

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

  438.         }

  439.         /* New line */

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

  441.     }

  442. 

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

  444. 

  445.     /* Crop to really used size */

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

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

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

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

  450. 

  451.     return data;

  452. }

  453. 

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

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

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

  457.  * correct header. */

  458. static void *export_html3(cucul_canvas_t const *cv, size_t *bytes)

  459. {

  460.     char *data, *cur;

  461.     int x, y, len;

  462. 

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

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

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

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

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

  468.      *          12 chars for "</font></td>" */

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

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

  471. 

  472.     /* Table */

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

  474.                         cv->height);

  475. 

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

  477.     {

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

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

  480. 

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

  482. 

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

  484.         {

  485.             int i, needfont;

  486. 

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

  488.              * (see below) */

  489.             len = 1;

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

  491.                 len++;

  492. 

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

  494. 

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

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

  497.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  498. 

  499.             if(len > 1)

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

  501. 

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

  503. 

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

  505. 

  506.             if(needfont)

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

  508.                                _cucul_attr_to_rgb24fg(lineattr[x]));

  509. 

  510.             if(lineattr[x] & CUCUL_BOLD)

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

  512.             if(lineattr[x] & CUCUL_ITALICS)

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

  514.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  516.             if(lineattr[x] & CUCUL_BLINK)

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

  518. 

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

  520.             {

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

  522.                     ;

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

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

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

  526.                     cur += sprintf(cur, "%c", (uint8_t)linechar[x + i]);

  527.                 else

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

  529.             }

  530. 

  531.             if(lineattr[x] & CUCUL_BLINK)

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

  533.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  535.             if(lineattr[x] & CUCUL_ITALICS)

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

  537.             if(lineattr[x] & CUCUL_BOLD)

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

  539. 

  540.             if(needfont)

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

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

  543.         }

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

  545.     }

  546. 

  547.     /* Footer */

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

  549. 

  550.     /* Crop to really used size */

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

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

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

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

  555. 

  556.     return data;

  557. }

  558. 

  559. static void *export_bbfr(cucul_canvas_t const *cv, size_t *bytes)

  560. {

  561.     char *data, *cur;

  562.     int x, y, len;

  563. 

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

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

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

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

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

  569.      *          8 chars for "[/c][/f]" */

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

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

  572. 

  573.     /* Table */

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

  575. 

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

  577.     {

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

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

  580. 

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

  582.         {

  583.             int i, needback, needfront;

  584. 

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

  586.              * (see below) */

  587.             len = 1;

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

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

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

  591.                     len++;

  592.             else

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

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

  595.                     len++;

  596. 

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

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

  599. 

  600.             if(needback)

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

  602.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  603. 

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

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

  606.                                _cucul_attr_to_rgb24bg(lineattr[x]));

  607.             else if(needfront)

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

  609.                                _cucul_attr_to_rgb24fg(lineattr[x]));

  610. 

  611.             if(lineattr[x] & CUCUL_BOLD)

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

  613.             if(lineattr[x] & CUCUL_ITALICS)

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

  615.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  617.             if(lineattr[x] & CUCUL_BLINK)

  618.                 ; /* FIXME */

  619. 

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

  621.             {

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

  623.                     ;

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

  625.                     *cur++ = '_';

  626.                 else

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

  628.             }

  629. 

  630.             if(lineattr[x] & CUCUL_BLINK)

  631.                 ; /* FIXME */

  632.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  634.             if(lineattr[x] & CUCUL_ITALICS)

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

  636.             if(lineattr[x] & CUCUL_BOLD)

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

  638. 

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

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

  641.             if(needback)

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

  643.         }

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

  645.     }

  646. 

  647.     /* Footer */

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

  649. 

  650.     /* Crop to really used size */

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

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

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

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

  655. 

  656.     return data;

  657. }

  658. 

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

  660. static void *export_irc(cucul_canvas_t const *cv, size_t *bytes)

  661. {

  662.     static uint8_t const palette[] =

  663.     {

  664.         1, 2, 3, 10, 5, 6, 7, 15, /* Dark */

  665.         14, 12, 9, 11, 4, 13, 8, 0, /* Light */

  666.     };

  667. 

  668.     char *data, *cur;

  669.     int x, y;

  670. 

  671.     /* 14 bytes assumed for max length per pixel. Worst case scenario:

  672.      * ^Cxx,yy   6 bytes

  673.      * ^B^B      2 bytes

  674.      * ch        6 bytes

  675.      * 3 bytes for max length per line. Worst case scenario:

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

  677.      * \r\n      2 bytes

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

  679.      */

  680. 

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

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

  683. 

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

  685.     {

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

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

  688. 

  689.         uint8_t prevfg = 0x10;

  690.         uint8_t prevbg = 0x10;

  691. 

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

  693.         {

  694.             uint32_t attr = lineattr[x];

  695.             uint32_t ch = linechar[x];

  696.             uint8_t ansifg, ansibg, fg, bg;

  697. 

  698.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  699.                 continue;

  700. 

  701.             ansifg = cucul_attr_to_ansi_fg(attr);

  702.             ansibg = cucul_attr_to_ansi_bg(attr);

  703. 

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

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

  706. 

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

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

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

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

  711.             {

  712.                 int need_escape = 0;

  713. 

  714.                 if(bg == 0x10)

  715.                 {

  716.                     if(fg == 0x10)

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

  718.                     else

  719.                     {

  720.                         if(prevbg == 0x10)

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

  722.                         else

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

  724. 

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

  726.                             need_escape = 1;

  727.                     }

  728.                 }

  729.                 else

  730.                 {

  731.                     if(fg == 0x10)

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

  733.                     else

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

  735.                 }

  736. 

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

  738.                     need_escape = 1;

  739. 

  740.                 if(need_escape)

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

  742.             }

  743. 

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

  745.             prevfg = fg;

  746.             prevbg = bg;

  747.         }

  748. 

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

  750.         if(!cv->width)

  751.             *cur++ = ' ';

  752. 

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

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

  755.     }

  756. 

  757.     /* Crop to really used size */

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

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

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

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

  762. 

  763.     return data;

  764. }

  765. 

  766. /* Export a PostScript document. */

  767. static void *export_ps(cucul_canvas_t const *cv, size_t *bytes)

  768. {

  769.     static char const *ps_header =

  770.         "%!\n"

  771.         "%% libcaca PDF export\n"

  772.         "%%LanguageLevel: 2\n"

  773.         "%%Pages: 1\n"

  774.         "%%DocumentData: Clean7Bit\n"

  775.         "/csquare {\n"

  776.         "  newpath\n"

  777.         "  0 0 moveto\n"

  778.         "  0 1 rlineto\n"

  779.         "  1 0 rlineto\n"

  780.         "  0 -1 rlineto\n"

  781.         "  closepath\n"

  782.         "  setrgbcolor\n"

  783.         "  fill\n"

  784.         "} def\n"

  785.         "/S {\n"

  786.         "  Show\n"

  787.         "} bind def\n"

  788.         "/Courier-Bold findfont\n"

  789.         "8 scalefont\n"

  790.         "setfont\n"

  791.         "gsave\n"

  792.         "6 10 scale\n";

  793. 

  794.     char *data, *cur;

  795.     int x, y;

  796. 

  797.     /* 200 is arbitrary but should be ok */

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

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

  800. 

  801.     /* Header */

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

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

  804. 

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

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

  807.     {

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

  809. 

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

  811.         {

  812.             uint8_t argb[8];

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

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

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

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

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

  818.         }

  819. 

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

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

  822.     }

  823. 

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

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

  826. 

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

  828.     {

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

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

  831. 

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

  833.         {

  834.             uint8_t argb[8];

  835.             uint32_t ch = *linechar++;

  836. 

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

  838. 

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

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

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

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

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

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

  845. 

  846.             if(ch < 0x00000020)

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

  848.             else if(ch >= 0x00000080)

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

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

  851.             {

  852.                 case '\\':

  853.                 case '(':

  854.                 case ')':

  855.                     cur += sprintf(cur, "(\\%c) show\n", (uint8_t)ch);

  856.                     break;

  857.                 default:

  858.                     cur += sprintf(cur, "(%c) show\n", (uint8_t)ch);

  859.                     break;

  860.             }

  861.         }

  862.     }

  863. 

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

  865. 

  866.     /* Crop to really used size */

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

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

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

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

  871. 

  872.     return data;

  873. }

  874. 

  875. /* Export an SVG vector image */

  876. static void *export_svg(cucul_canvas_t const *cv, size_t *bytes)

  877. {

  878.     static char const svg_header[] =

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

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

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

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

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

  884. 

  885.     char *data, *cur;

  886.     int x, y;

  887. 

  888.     /* 200 is arbitrary but should be ok */

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

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

  891. 

  892.     /* Header */

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

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

  895. 

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

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

  898. 

  899.     /* Background */

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

  901.     {

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

  903. 

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

  905.         {

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

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

  908.                                 cucul_attr_to_rgb12_bg(*lineattr++),

  909.                                 x * 6, y * 10);

  910.         }

  911.     }

  912. 

  913.     /* Text */

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

  915.     {

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

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

  918. 

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

  920.         {

  921.             uint32_t ch = *linechar++;

  922. 

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

  924.             {

  925.                 lineattr++;

  926.                 continue;

  927.             }

  928. 

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

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

  931.                                 cucul_attr_to_rgb12_fg(*lineattr++),

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

  933. 

  934.             if(ch < 0x00000020)

  935.                 *cur++ = '?';

  936.             else if(ch > 0x0000007f)

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

  938.             else switch((uint8_t)ch)

  939.             {

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

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

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

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

  944.             }

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

  946.         }

  947.     }

  948. 

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

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

  951. 

  952.     /* Crop to really used size */

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

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

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

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

  957. 

  958.     return data;

  959. }

  960. 

  961. /* Export a TGA image */

  962. static void *export_tga(cucul_canvas_t const *cv, size_t *bytes)

  963. {

  964.     char const * const *fontlist;

  965.     char *data, *cur;

  966.     cucul_font_t *f;

  967.     int i, w, h;

  968. 

  969.     fontlist = cucul_get_font_list();

  970.     if(!fontlist[0])

  971.     {

  972.         seterrno(EINVAL);

  973.         return NULL;

  974.     }

  975. 

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

  977. 

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

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

  980. 

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

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

  983. 

  984.     /* ID Length */

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

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

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

  988.     /* Image Type: uncompressed truecolor */

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

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

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

  992. 

  993.     /* Image Specification */

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

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

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

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

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

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

  1000. 

  1001.     /* Image ID: no ID */

  1002.     /* Color Map Data: no colormap */

  1003. 

  1004.     /* Image Data */

  1005.     cucul_render_canvas(cv, f, cur, w, h, 4 * w);

  1006. 

  1007.     /* Swap bytes. What a waste of time. */

  1008.     for(i = 0; i < w * h * 4; i += 4)

  1009.     {

  1010.         char c;

  1011.         c = cur[i]; cur[i] = cur[i + 3]; cur[i + 3] = c;

  1012.         c = cur[i + 1]; cur[i + 1] = cur[i + 2]; cur[i + 2] = c;

  1013.     }

  1014. 

  1015.     cucul_free_font(f);

  1016. 

  1017.     return data;

  1018. }