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libcaca/caca/codec/export.c

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33 KiB
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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2009 Sam Hocevar <sam@hocevar.net>

  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 "caca.h"

  29. #include "caca_internals.h"

  30. #include "codec.h"

  31. 

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

  33. {

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

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

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

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

  38.     return 4;

  39. }

  40. 

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

  42. {

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

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

  45.     return 2;

  46. }

  47. 

  48. static void *export_caca(caca_canvas_t const *, size_t *);

  49. static void *export_html(caca_canvas_t const *, size_t *);

  50. static void *export_html3(caca_canvas_t const *, size_t *);

  51. static void *export_bbfr(caca_canvas_t const *, size_t *);

  52. static void *export_ps(caca_canvas_t const *, size_t *);

  53. static void *export_svg(caca_canvas_t const *, size_t *);

  54. static void *export_tga(caca_canvas_t const *, size_t *);

  55. 

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

  57.  *

  58.  *  This function exports a libcaca canvas into various foreign formats such

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

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

  61.  *

  62.  *  Valid values for \c format are:

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

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

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

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

  67.  *    most navigators, including textmode ones.

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

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

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

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

  72.  *

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

  74.  *  - \c EINVAL Unsupported format requested.

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

  76.  *

  77.  *  \param cv A libcaca canvas

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

  79.  *  \param bytes A pointer to a size_t where the number of allocated bytes

  80.  *         will be written.

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

  82.  */

  83. void *caca_export_canvas_to_memory(caca_canvas_t const *cv, char const *format,

  84.                                    size_t *bytes)

  85. {

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

  87.         return export_caca(cv, bytes);

  88. 

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

  90.         return _export_ansi(cv, bytes);

  91. 

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

  93.         return _export_utf8(cv, bytes, 0);

  94. 

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

  96.         return _export_utf8(cv, bytes, 1);

  97. 

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

  99.         return export_html(cv, bytes);

  100. 

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

  102.         return export_html3(cv, bytes);

  103. 

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

  105.         return export_bbfr(cv, bytes);

  106. 

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

  108.         return _export_irc(cv, bytes);

  109. 

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

  111.         return export_ps(cv, bytes);

  112. 

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

  114.         return export_svg(cv, bytes);

  115. 

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

  117.         return export_tga(cv, bytes);

  118. 

  119.     seterrno(EINVAL);

  120.     return NULL;

  121. }

  122. 

  123. /** \brief Export a canvas portion into a foreign format.

  124.  *

  125.  *  This function exports a portion of a \e libcaca canvas into various

  126.  *  formats. For more information, see caca_export_canvas_to_memory().

  127.  *

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

  129.  *  - \c EINVAL Unsupported format requested or invalid coordinates.

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

  131.  *

  132.  *  \param cv A libcaca canvas

  133.  *  \param x The leftmost coordinate of the area to export.

  134.  *  \param y The topmost coordinate of the area to export.

  135.  *  \param w The width of the area to export.

  136.  *  \param h The height of the area to export.

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

  138.  *  \param bytes A pointer to a size_t where the number of allocated bytes

  139.  *         will be written.

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

  141.  */

  142. void *caca_export_area_to_memory(caca_canvas_t const *cv, int x, int y, int w,

  143.                                  int h, char const *format, size_t *bytes)

  144. {

  145.     caca_canvas_t *tmp;

  146.     void *ret;

  147. 

  148.     if(w < 0 || h < 0 || x < 0 || y < 0

  149.         || x + w > cv->width || y + h > cv->height)

  150.     {

  151.         seterrno(EINVAL);

  152.         return NULL;

  153.     }

  154. 

  155.     /* TODO: we need to spare the blit here by exporting the area we want. */

  156.     tmp = caca_create_canvas(w, h);

  157.     caca_blit(tmp, -x, -y, cv, NULL);

  158. 

  159.     ret = caca_export_canvas_to_memory(tmp, format, bytes);

  160. 

  161.     caca_free_canvas(tmp);

  162. 

  163.     return ret;

  164. }

  165. 

  166. /** \brief Get available export formats

  167.  *

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

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

  170.  *  the export format, to be used with caca_export_memory(), and a string

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

  172.  *

  173.  *  This function never fails.

  174.  *

  175.  *  \return An array of strings.

  176.  */

  177. char const * const * caca_get_export_list(void)

  178. {

  179.     static char const * const list[] =

  180.     {

  181.         "caca", "native libcaca format",

  182.         "ansi", "ANSI",

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

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

  185.         "html", "HTML",

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

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

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

  189.         "ps", "PostScript document",

  190.         "svg", "SVG vector image",

  191.         "tga", "TGA image",

  192.         NULL, NULL

  193.     };

  194. 

  195.     return list;

  196. }

  197. 

  198. /*

  199.  * XXX: the following functions are local.

  200.  */

  201. 

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

  203. static void *export_caca(caca_canvas_t const *cv, size_t *bytes)

  204. {

  205.     char *data, *cur;

  206.     int f, n;

  207. 

  208.     /* 52 bytes for the header:

  209.      *  - 4 bytes for "\xCA\xCA" + "CV"

  210.      *  - 16 bytes for the canvas header

  211.      *  - 32 bytes for the frame info

  212.      * 8 bytes for each character cell */

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

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

  215. 

  216.     /* magic */

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

  218. 

  219.     /* canvas_header */

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

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

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

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

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

  225. 

  226.     /* frame_info */

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

  228.     {

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

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

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

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

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

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

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

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

  237.     }

  238. 

  239.     /* canvas_data */

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

  241.     {

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

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

  244. 

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

  246.         {

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

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

  249.         }

  250.     }

  251. 

  252.     return data;

  253. }

  254. 

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

  256. static void *export_html(caca_canvas_t const *cv, size_t *bytes)

  257. {

  258.     char *data, *cur;

  259.     int x, y, len;

  260. 

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

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

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

  264.      *          83 chars for ";font-weight..."

  265.      *          up to 10 chars for "&#xxxxxxx;", far less for pure ASCII

  266.      *          7 chars for "</span>" */

  267.     *bytes = 1000 + cv->height * (7 + cv->width * (47 + 83 + 10 + 7));

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

  269. 

  270.     /* HTML header */

  271. 

  272.     cur += sprintf(cur, "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n");

  273.     cur += sprintf(cur, "   \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n");

  274.     cur += sprintf(cur, "<html xmlns=\"http://www.w3.org/1999/xhtml\" lang=\"en\" xml:lang=\"en\">");

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

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

  277.                         caca_get_version());

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

  279. 

  280.     cur += sprintf(cur, "<div style=\"%s\">\n",

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

  282. 

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

  284.     {

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

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

  287. 

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

  289.         {

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

  291.             if(caca_attr_to_ansi_fg(lineattr[x]) != CACA_DEFAULT)

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

  293.                                caca_attr_to_rgb12_fg(lineattr[x]));

  294.             if(caca_attr_to_ansi_bg(lineattr[x]) < 0x10)

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

  296.                                caca_attr_to_rgb12_bg(lineattr[x]));

  297.             if(lineattr[x] & CACA_BOLD)

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

  299.             if(lineattr[x] & CACA_ITALICS)

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

  301.             if(lineattr[x] & CACA_UNDERLINE)

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

  303.             if(lineattr[x] & CACA_BLINK)

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

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

  306. 

  307.             for(len = 0;

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

  309.                 len++)

  310.             {

  311.                 if(linechar[x + len] == CACA_MAGIC_FULLWIDTH)

  312.                     ;

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

  314.                         ||

  315.                         ((linechar[x + len] >= 0x0000007f)

  316.                          &&

  317.                          (linechar[x + len] <= 0x000000a0)))

  318.                 {

  319.                     /* Control characters and space converted to

  320.                      * U+00A0 NO-BREAK SPACE, a.k.a. "&nbsp;" in HTML,

  321.                      * but we use the equivalent numeric character

  322.                      * reference &#160; so this will work in plain

  323.                      * XHTML with no DTD too. */

  324.                     cur += sprintf(cur, "&#160;");

  325.                 }

  326.                 else if(linechar[x + len] == '&')

  327.                     cur += sprintf(cur, "&amp;");

  328.                 else if(linechar[x + len] == '<')

  329.                     cur += sprintf(cur, "&lt;");

  330.                 else if(linechar[x + len] == '>')

  331.                     cur += sprintf(cur, "&gt;");

  332.                 else if(linechar[x + len] == '\"')

  333.                     cur += sprintf(cur, "&quot;");

  334.                 else if(linechar[x + len] == '\'')

  335.                     cur += sprintf(cur, "&#39;");

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

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

  338.                 else if((linechar[x + len] <= 0x0010fffd)

  339.                         &&

  340.                         ((linechar[x + len] & 0x0000fffe) != 0x0000fffe)

  341.                         &&

  342.                         ((linechar[x + len] < 0x0000d800)

  343.                          ||

  344.                          (linechar[x + len] > 0x0000dfff)))

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

  346.                 else

  347.                     /* non-character codepoints become U+FFFD

  348.                      * REPLACEMENT CHARACTER */

  349.                     cur += sprintf(cur, "&#%i;", (unsigned int)0x0000fffd);

  350.             }

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

  352.         }

  353.         /* New line */

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

  355.     }

  356. 

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

  358. 

  359.     /* Crop to really used size */

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

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

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

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

  364. 

  365.     return data;

  366. }

  367. 

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

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

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

  371.  * correct header. */

  372. static void *export_html3(caca_canvas_t const *cv, size_t *bytes)

  373. {

  374.     char *data, *cur;

  375.     int x, y, len;

  376.     int has_multi_cell_row = 0;

  377.     unsigned char *cell_boundary_bitmap;

  378. 

  379.     /* Table */

  380.     cell_boundary_bitmap = (unsigned char *) malloc((cv->width + 7) / 8);

  381.     if(cell_boundary_bitmap)

  382.         memset((void *) cell_boundary_bitmap, 0, (cv->width + 7) / 8);

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

  384.     {

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

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

  387. 

  388.         for(x = 1; x < cv->width; x++)

  389.             if((! (cell_boundary_bitmap

  390.                    ?

  391.                    (cell_boundary_bitmap[x / 8] & (1 << (x % 8)))

  392.                    :

  393.                    has_multi_cell_row))

  394.                &&

  395.                (((linechar[x - 1] == CACA_MAGIC_FULLWIDTH)

  396.                  &&

  397.                  (! caca_utf32_is_fullwidth(linechar[x])))

  398.                 ||

  399.                 (caca_attr_to_ansi_bg(lineattr[x - 1])

  400.                  !=

  401.                  caca_attr_to_ansi_bg(lineattr[x]))

  402.                 ||

  403.                 ((caca_attr_to_ansi_bg(lineattr[x]) < 0x10)

  404.                  ?

  405.                  (_caca_attr_to_rgb24bg(lineattr[x - 1])

  406.                   !=

  407.                   _caca_attr_to_rgb24bg(lineattr[x]))

  408.                  :

  409.                  0)))

  410.             {

  411.                 has_multi_cell_row = 1;

  412.                 if(cell_boundary_bitmap)

  413.                     cell_boundary_bitmap[x / 8] |= 1 << (x % 8);

  414.             }

  415.     }

  416. 

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

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

  419.      * A glyph: up to 48 chars for "<td bgcolor=\"#xxxxxx\"><tt><font color=\"#xxxxxx\">"

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

  421.      *          up to 10 chars for "&#xxxxxxx;" (far less for pure ASCII)

  422.      *          17 chars for "</font></tt></td>" */

  423.     *bytes = 1000 + cv->height * (10 + cv->width * (48 + 36 + 10 + 17));

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

  425. 

  426.     cur += sprintf(cur, "<table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" summary=\"[libcaca canvas export]\">\n");

  427. 

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

  429.     {

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

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

  432. 

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

  434. 

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

  436.         {

  437.             int i, needfont = 0;

  438.             int nonblank = 0;

  439. 

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

  441.              * (see below) */

  442.             len = 1;

  443.             while((x + len < cv->width)

  444.                   &&

  445.                   ((y

  446.                     &&

  447.                     (linechar[x + len] > 0x00000020)

  448.                     &&

  449.                     ((linechar[x + len] < 0x0000007f)

  450.                      ||

  451.                      (linechar[x + len] > 0x000000a0)))

  452.                    ||

  453.                    (! (cell_boundary_bitmap

  454.                        ?

  455.                        (cell_boundary_bitmap[(x + len) / 8] & (1 << ((x + len) % 8)))

  456.                        :

  457.                        has_multi_cell_row))

  458.                    ||

  459.                    (linechar[x + len] == CACA_MAGIC_FULLWIDTH)

  460.                    ||

  461.                    (cv->height == 1))

  462.                   &&

  463.                   ((linechar[x + len - 1] != CACA_MAGIC_FULLWIDTH)

  464.                    ||

  465.                    caca_utf32_is_fullwidth(linechar[x + len]))

  466.                   &&

  467.                   (caca_attr_to_ansi_bg(lineattr[x + len])

  468.                    ==

  469.                    caca_attr_to_ansi_bg(lineattr[x]))

  470.                   &&

  471.                   ((caca_attr_to_ansi_bg(lineattr[x]) < 0x10)

  472.                    ?

  473.                    (_caca_attr_to_rgb24bg(lineattr[x + len])

  474.                     ==

  475.                     _caca_attr_to_rgb24bg(lineattr[x]))

  476.                    :

  477.                    1))

  478.                 len++;

  479. 

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

  481.                 if(! ((linechar[x + i] <= 0x00000020)

  482.                       ||

  483.                       ((linechar[x + i] >= 0x0000007f)

  484.                        &&

  485.                        (linechar[x + i] <= 0x000000a0))))

  486.                     nonblank = 1;

  487. 

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

  489. 

  490.             if(caca_attr_to_ansi_bg(lineattr[x]) < 0x10)

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

  492.                                _caca_attr_to_rgb24bg(lineattr[x]));

  493. 

  494.             if(has_multi_cell_row && (len > 1))

  495.             {

  496.                 int colspan;

  497. 

  498.                 colspan = len;

  499.                 if(cell_boundary_bitmap)

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

  501.                         if(i

  502.                            &&

  503.                            ! (cell_boundary_bitmap[(x + i) / 8]

  504.                               &

  505.                               (1 << ((x + i) % 8))))

  506.                             colspan --;

  507.                 if(colspan > 1)

  508.                     cur += sprintf(cur, " colspan=\"%d\"", colspan);

  509.             }

  510. 

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

  512. 

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

  514. 

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

  516.             {

  517.                 if(nonblank

  518.                    &&

  519.                    ((! i)

  520.                     ||

  521.                     (lineattr[x + i] != lineattr[x + i - 1])))

  522.                 {

  523.                     needfont = (caca_attr_to_ansi_fg(lineattr[x + i])

  524.                                 !=

  525.                                 CACA_DEFAULT);

  526. 

  527.                     if(needfont)

  528.                         cur += sprintf(cur, "<font color=\"#%.06lx\">",

  529.                                        (unsigned long int)

  530.                                        _caca_attr_to_rgb24fg(lineattr[x + i]));

  531. 

  532.                     if(lineattr[x + i] & CACA_BOLD)

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

  534.                     if(lineattr[x + i] & CACA_ITALICS)

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

  536.                     if(lineattr[x + i] & CACA_UNDERLINE)

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

  538.                     if(lineattr[x + i] & CACA_BLINK)

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

  540.                 }

  541. 

  542.                 if(linechar[x + i] == CACA_MAGIC_FULLWIDTH)

  543.                     ;

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

  545.                         ||

  546.                         ((linechar[x + i] >= 0x0000007f)

  547.                          &&

  548.                          (linechar[x + i] <= 0x000000a0)))

  549.                 {

  550.                     /* Control characters and space converted to

  551.                      * U+00A0 NO-BREAK SPACE, a.k.a. "&nbsp;" in HTML,

  552.                      * but we use the equivalent numeric character

  553.                      * reference &#160; so this will work in plain

  554.                      * XHTML with no DTD too. */

  555.                     cur += sprintf(cur, "&#160;");

  556.                 }

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

  558.                     cur += sprintf(cur, "&amp;");

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

  560.                     cur += sprintf(cur, "&lt;");

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

  562.                     cur += sprintf(cur, "&gt;");

  563.                 else if(linechar[x + i] == '\"')

  564.                     cur += sprintf(cur, "&quot;");

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

  566.                     cur += sprintf(cur, "&#39;");

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

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

  569.                 else if((linechar[x + i] <= 0x0010fffd)

  570.                         &&

  571.                         ((linechar[x + i] & 0x0000fffe) != 0x0000fffe)

  572.                         &&

  573.                         ((linechar[x + i] < 0x0000d800)

  574.                          ||

  575.                          (linechar[x + i] > 0x0000dfff)))

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

  577.                 else

  578.                     /* non-character codepoints become U+FFFD

  579.                      * REPLACEMENT CHARACTER */

  580.                     cur += sprintf(cur, "&#%i;", (unsigned int)0x0000fffd);

  581. 

  582.                 if (nonblank

  583.                     &&

  584.                     (((i + 1) == len)

  585.                      ||

  586.                      (lineattr[x + i + 1] != lineattr[x + i])))

  587.                 {

  588.                     if(lineattr[x + i] & CACA_BLINK)

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

  590.                     if(lineattr[x + i] & CACA_UNDERLINE)

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

  592.                     if(lineattr[x + i] & CACA_ITALICS)

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

  594.                     if(lineattr[x + i] & CACA_BOLD)

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

  596. 

  597.                     if(needfont)

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

  599.                 }

  600.             }

  601. 

  602.             cur += sprintf(cur, "</tt>");

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

  604.         }

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

  606.     }

  607. 

  608.     /* Footer */

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

  610. 

  611.     /* Free working memory */

  612.     if (cell_boundary_bitmap)

  613.         free((void *) cell_boundary_bitmap);

  614. 

  615.     /* Crop to really used size */

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

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

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

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

  620. 

  621.     return data;

  622. }

  623. 

  624. static void *export_bbfr(caca_canvas_t const *cv, size_t *bytes)

  625. {

  626.     char *data, *cur;

  627.     int x, y, len;

  628. 

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

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

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

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

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

  634.      *          8 chars for "[/c][/f]" */

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

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

  637. 

  638.     /* Table */

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

  640. 

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

  642.     {

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

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

  645. 

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

  647.         {

  648.             int i, needback, needfront;

  649. 

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

  651.              * (see below) */

  652.             len = 1;

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

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

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

  656.                     len++;

  657.             else

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

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

  660.                     len++;

  661. 

  662.             needback = caca_attr_to_ansi_bg(lineattr[x]) < 0x10;

  663.             needfront = caca_attr_to_ansi_fg(lineattr[x]) < 0x10;

  664. 

  665.             if(needback)

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

  667.                                _caca_attr_to_rgb24bg(lineattr[x]));

  668. 

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

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

  671.                                _caca_attr_to_rgb24bg(lineattr[x]));

  672.             else if(needfront)

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

  674.                                _caca_attr_to_rgb24fg(lineattr[x]));

  675. 

  676.             if(lineattr[x] & CACA_BOLD)

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

  678.             if(lineattr[x] & CACA_ITALICS)

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

  680.             if(lineattr[x] & CACA_UNDERLINE)

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

  682.             if(lineattr[x] & CACA_BLINK)

  683.                 ; /* FIXME */

  684. 

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

  686.             {

  687.                 if(linechar[x + i] == CACA_MAGIC_FULLWIDTH)

  688.                     ;

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

  690.                     *cur++ = '_';

  691.                 else

  692.                     cur += caca_utf32_to_utf8(cur, linechar[x + i]);

  693.             }

  694. 

  695.             if(lineattr[x] & CACA_BLINK)

  696.                 ; /* FIXME */

  697.             if(lineattr[x] & CACA_UNDERLINE)

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

  699.             if(lineattr[x] & CACA_ITALICS)

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

  701.             if(lineattr[x] & CACA_BOLD)

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

  703. 

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

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

  706.             if(needback)

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

  708.         }

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

  710.     }

  711. 

  712.     /* Footer */

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

  714. 

  715.     /* Crop to really used size */

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

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

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

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

  720. 

  721.     return data;

  722. }

  723. 

  724. /* Export a PostScript document. */

  725. static void *export_ps(caca_canvas_t const *cv, size_t *bytes)

  726. {

  727.     static char const *ps_header =

  728.         "%!\n"

  729.         "%% libcaca PDF export\n"

  730.         "%%LanguageLevel: 2\n"

  731.         "%%Pages: 1\n"

  732.         "%%DocumentData: Clean7Bit\n"

  733.         "/csquare {\n"

  734.         "  newpath\n"

  735.         "  0 0 moveto\n"

  736.         "  0 1 rlineto\n"

  737.         "  1 0 rlineto\n"

  738.         "  0 -1 rlineto\n"

  739.         "  closepath\n"

  740.         "  setrgbcolor\n"

  741.         "  fill\n"

  742.         "} def\n"

  743.         "/S {\n"

  744.         "  Show\n"

  745.         "} bind def\n"

  746.         "/Courier-Bold findfont\n"

  747.         "8 scalefont\n"

  748.         "setfont\n"

  749.         "gsave\n"

  750.         "6 10 scale\n";

  751. 

  752.     char *data, *cur;

  753.     int x, y;

  754. 

  755.     /* 200 is arbitrary but should be ok */

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

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

  758. 

  759.     /* Header */

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

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

  762. 

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

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

  765.     {

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

  767. 

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

  769.         {

  770.             uint8_t argb[8];

  771.             caca_attr_to_argb64(*lineattr++, argb);

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

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

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

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

  776.         }

  777. 

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

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

  780.     }

  781. 

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

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

  784. 

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

  786.     {

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

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

  789. 

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

  791.         {

  792.             uint8_t argb[8];

  793.             uint32_t ch = *linechar++;

  794. 

  795.             caca_attr_to_argb64(*lineattr++, argb);

  796. 

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

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

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

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

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

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

  803. 

  804.             if(ch < 0x00000020)

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

  806.             else if(ch >= 0x00000080)

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

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

  809.             {

  810.                 case '\\':

  811.                 case '(':

  812.                 case ')':

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

  814.                     break;

  815.                 default:

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

  817.                     break;

  818.             }

  819.         }

  820.     }

  821. 

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

  823. 

  824.     /* Crop to really used size */

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

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

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

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

  829. 

  830.     return data;

  831. }

  832. 

  833. /* Export an SVG vector image */

  834. static void *export_svg(caca_canvas_t const *cv, size_t *bytes)

  835. {

  836.     static char const svg_header[] =

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

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

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

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

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

  842. 

  843.     char *data, *cur;

  844.     int x, y;

  845. 

  846.     /* 200 is arbitrary but should be ok */

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

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

  849. 

  850.     /* Header */

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

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

  853. 

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

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

  856. 

  857.     /* Background */

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

  859.     {

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

  861. 

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

  863.         {

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

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

  866.                                 caca_attr_to_rgb12_bg(*lineattr++),

  867.                                 x * 6, y * 10);

  868.         }

  869.     }

  870. 

  871.     /* Text */

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

  873.     {

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

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

  876. 

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

  878.         {

  879.             uint32_t ch = *linechar++;

  880. 

  881.             if(ch == ' ' || ch == CACA_MAGIC_FULLWIDTH)

  882.             {

  883.                 lineattr++;

  884.                 continue;

  885.             }

  886. 

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

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

  889.                                 caca_attr_to_rgb12_fg(*lineattr++),

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

  891. 

  892.             if(ch < 0x00000020)

  893.                 *cur++ = '?';

  894.             else if(ch > 0x0000007f)

  895.                 cur += caca_utf32_to_utf8(cur, ch);

  896.             else switch((uint8_t)ch)

  897.             {

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

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

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

  901.                 default: *cur++ = (uint8_t)ch; break;

  902.             }

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

  904.         }

  905.     }

  906. 

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

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

  909. 

  910.     /* Crop to really used size */

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

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

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

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

  915. 

  916.     return data;

  917. }

  918. 

  919. /* Export a TGA image */

  920. static void *export_tga(caca_canvas_t const *cv, size_t *bytes)

  921. {

  922.     char const * const *fontlist;

  923.     char *data, *cur;

  924.     caca_font_t *f;

  925.     int i, w, h;

  926. 

  927.     fontlist = caca_get_font_list();

  928.     if(!fontlist[0])

  929.     {

  930.         seterrno(EINVAL);

  931.         return NULL;

  932.     }

  933. 

  934.     f = caca_load_font(fontlist[0], 0);

  935. 

  936.     w = caca_get_canvas_width(cv) * caca_get_font_width(f);

  937.     h = caca_get_canvas_height(cv) * caca_get_font_height(f);

  938. 

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

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

  941. 

  942.     /* ID Length */

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

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

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

  946.     /* Image Type: uncompressed truecolor */

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

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

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

  950. 

  951.     /* Image Specification */

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

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

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

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

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

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

  958. 

  959.     /* Image ID: no ID */

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

  961. 

  962.     /* Image Data */

  963.     caca_render_canvas(cv, f, cur, w, h, 4 * w);

  964. 

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

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

  967.     {

  968.         char c;

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

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

  971.     }

  972. 

  973.     caca_free_font(f);

  974. 

  975.     return data;

  976. }

  977. 

  978. /*

  979.  * XXX: The following functions are aliases.

  980.  */

  981. 

  982. void *cucul_export_memory(cucul_canvas_t const *, char const *,

  983.                           size_t *) CACA_ALIAS(caca_export_canvas_to_memory);

  984. void *caca_export_memory(caca_canvas_t const *, char const *,

  985.                          size_t *) CACA_ALIAS(caca_export_canvas_to_memory);

  986. char const * const * cucul_get_export_list(void)

  987.          CACA_ALIAS(caca_get_export_list);