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libcaca/cucul/export.c

901 行
28 KiB
原始文件 Blame 文件历史 

  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; you can redistribute it and/or

  10.  *  modify it under the terms of the Do What The Fuck You Want To

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

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

  13.  */

  14. 

  15. /*

  16.  *  This file contains various export functions

  17.  */

  18. 

  19. #include "config.h"

  20. #include "common.h"

  21. 

  22. #if !defined(__KERNEL__)

  23. #   if defined(HAVE_ERRNO_H)

  24. #       include <errno.h>

  25. #   endif

  26. #   include <stdlib.h>

  27. #   include <stdio.h>

  28. #   include <string.h>

  29. #endif

  30. 

  31. #include "cucul.h"

  32. #include "cucul_internals.h"

  33. 

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

  35. {

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

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

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

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

  40.     return 4;

  41. }

  42. 

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

  44. {

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

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

  47.     return 2;

  48. }

  49. 

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

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

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

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

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

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

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

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

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

  59. 

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

  61.  *

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

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

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

  65.  *

  66.  *  Valid values for \c format are:

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

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

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

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

  71.  *    most navigators, including textmode ones.

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

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

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

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

  76.  *

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

  78.  *  - \c EINVAL Unsupported format requested.

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

  80.  *

  81.  *  \param cv A libcucul canvas

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

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

  84.  *         allocated bytes will be written.

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

  86.  */

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

  88.                           unsigned long int *bytes)

  89. {

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

  91.         return export_caca(cv, bytes);

  92. 

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

  94.         return export_ansi(cv, bytes);

  95. 

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

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

  98. 

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

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

  101. 

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

  103.         return export_html(cv, bytes);

  104. 

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

  106.         return export_html3(cv, bytes);

  107. 

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

  109.         return export_irc(cv, bytes);

  110. 

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

  112.         return export_ps(cv, bytes);

  113. 

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

  115.         return export_svg(cv, bytes);

  116. 

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

  118.         return export_tga(cv, bytes);

  119. 

  120. #if defined(HAVE_ERRNO_H)

  121.     errno = EINVAL;

  122. #endif

  123.     return NULL;

  124. }

  125. 

  126. /** \brief Get available export formats

  127.  *

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

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

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

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

  132.  *

  133.  *  This function never fails.

  134.  *

  135.  *  \return An array of strings.

  136.  */

  137. char const * const * cucul_get_export_list(void)

  138. {

  139.     static char const * const list[] =

  140.     {

  141.         "caca", "native libcaca format",

  142.         "ansi", "ANSI",

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

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

  145.         "html", "HTML",

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

  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 *cv, unsigned long int *bytes)

  163. {

  164.     uint32_t *attrs = cv->attrs;

  165.     uint32_t *chars = cv->chars;

  166.     char *data, *cur;

  167.     unsigned int n;

  168. 

  169.     /* 52 bytes for the header:

  170.      *  - 4 bytes for "\xCA\xCA" + "CV"

  171.      *  - 16 bytes for the canvas header

  172.      *  - 32 bytes for the frame info

  173.      * 8 bytes for each character cell */

  174.     *bytes = 52 + 8 * cv->width * cv->height;

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

  176. 

  177.     /* magic */

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

  179. 

  180.     /* canvas_header */

  181.     cur += sprintu32(cur, 16 + 32 * 1);

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

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

  184.     cur += sprintu32(cur, 1);

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

  186. 

  187.     /* frame_info */

  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[0].x);

  193.     cur += sprintu32(cur, cv->frames[0].y);

  194.     cur += sprintu32(cur, cv->frames[0].handlex);

  195.     cur += sprintu32(cur, cv->frames[0].handley);

  196. 

  197.     /* canvas_data */

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

  199.     {

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

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

  202.     }

  203. 

  204.     return data;

  205. }

  206. 

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

  208. static void *export_utf8(cucul_canvas_t *cv, unsigned long int *bytes, int cr)

  209. {

  210.     static uint8_t const palette[] =

  211.     {

  212.         0,  4,  2,  6, 1,  5,  3,  7,

  213.         8, 12, 10, 14, 9, 13, 11, 15

  214.     };

  215. 

  216.     char *data, *cur;

  217.     unsigned int x, y;

  218. 

  219.     /* 23 bytes assumed for max length per pixel ('\e[5;1;3x;4y;9x;10ym' plus

  220.      * 4 max bytes for a UTF-8 character).

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

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

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

  224. 

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

  226.     {

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

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

  229. 

  230.         uint8_t prevfg = 0x10;

  231.         uint8_t prevbg = 0x10;

  232. 

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

  234.         {

  235.             uint32_t attr = lineattr[x];

  236.             uint32_t ch = linechar[x];

  237.             uint8_t ansifg, ansibg, fg, bg;

  238. 

  239.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  240.                 continue;

  241. 

  242.             ansifg = cucul_attr_to_ansi_fg(attr);

  243.             ansibg = cucul_attr_to_ansi_bg(attr);

  244. 

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

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

  247. 

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

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

  250.             {

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

  252. 

  253.                 if(fg < 8)

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

  255.                 else if(fg < 16)

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

  257. 

  258.                 if(bg < 8)

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

  260.                 else if(bg < 16)

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

  262. 

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

  264.             }

  265. 

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

  267. 

  268.             prevfg = fg;

  269.             prevbg = bg;

  270.         }

  271. 

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

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

  274. 

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

  276.     }

  277. 

  278.     /* Crop to really used size */

  279.     debug("utf8 export: alloc %li bytes, realloc %li\n",

  280.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  283. 

  284.     return data;

  285. }

  286. 

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

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

  289. {

  290.     static uint8_t const palette[] =

  291.     {

  292.         0,  4,  2,  6, 1,  5,  3,  7,

  293.         8, 12, 10, 14, 9, 13, 11, 15

  294.     };

  295. 

  296.     char *data, *cur;

  297.     unsigned int x, y;

  298. 

  299.     uint8_t prevfg = -1;

  300.     uint8_t prevbg = -1;

  301. 

  302.     /* 16 bytes assumed for max length per pixel ('\e[5;1;3x;4ym' plus

  303.      * 1 byte for a CP437 character).

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

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

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

  307. 

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

  309.     {

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

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

  312. 

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

  314.         {

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

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

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

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

  319.             uint32_t ch = linechar[x];

  320. 

  321.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  322.                 ch = '?';

  323. 

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

  325.             {

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

  327. 

  328.                 if(fg < 8)

  329.                     if(bg < 8)

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

  331.                     else

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

  333.                 else

  334.                     if(bg < 8)

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

  336.                     else

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

  338.             }

  339. 

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

  341. 

  342.             prevfg = fg;

  343.             prevbg = bg;

  344.         }

  345. 

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

  347.         {

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

  349.         }

  350.         else

  351.         {

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

  353.             prevfg = -1;

  354.             prevbg = -1;

  355.         }

  356.     }

  357. 

  358.     /* Crop to really used size */

  359.     debug("ansi export: alloc %li bytes, realloc %li\n",

  360.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  363. 

  364.     return data;

  365. }

  366. 

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

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

  369. {

  370.     char *data, *cur;

  371.     unsigned int x, y, len;

  372. 

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

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

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

  376.      *          83 chars for ";font-weight..."

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

  378.      *          7 chars for "</span>" */

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

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

  381. 

  382.     /* HTML header */

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

  384.     cur += sprintf(cur, "<title>Generated by libcaca %s</title>\n", VERSION);

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

  386. 

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

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

  389. 

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

  391.     {

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

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

  394. 

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

  396.         {

  397.             cur += sprintf(cur, "<span style=\"color:#%.03x;"

  398.                                 "background-color:#%.03x",

  399.                                 _cucul_attr_to_rgb12fg(lineattr[x]),

  400.                                 _cucul_attr_to_rgb12bg(lineattr[x]));

  401.             if(lineattr[x] & CUCUL_BOLD)

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

  403.             if(lineattr[x] & CUCUL_ITALICS)

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

  405.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  407.             if(lineattr[x] & CUCUL_BLINK)

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

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

  410. 

  411.             for(len = 0;

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

  413.                 len++)

  414.             {

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

  416.                     ;

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

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

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

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

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

  422.                 else

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

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

  425.             }

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

  427.         }

  428.         /* New line */

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

  430.     }

  431. 

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

  433. 

  434.     /* Crop to really used size */

  435.     debug("html export: alloc %li bytes, realloc %li\n",

  436.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  439. 

  440.     return data;

  441. }

  442. 

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

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

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

  446.  * correct header. */

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

  448. {

  449.     char *data, *cur;

  450.     unsigned int x, y, len;

  451. 

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

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

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

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

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

  457.      *          12 chars for "</font></td>" */

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

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

  460. 

  461.     /* Table */

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

  463.                         cv->height);

  464. 

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

  466.     {

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

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

  469. 

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

  471. 

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

  473.         {

  474.             unsigned int i;

  475. 

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

  477.              * (see below) */

  478.             len = 1;

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

  480.                 len++;

  481. 

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

  483.                            _cucul_attr_to_rgb24bg(lineattr[x]));

  484. 

  485.             if(len > 1)

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

  487. 

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

  489.                            _cucul_attr_to_rgb24fg(lineattr[x]));

  490. 

  491.             if(lineattr[x] & CUCUL_BOLD)

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

  493.             if(lineattr[x] & CUCUL_ITALICS)

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

  495.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  497.             if(lineattr[x] & CUCUL_BLINK)

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

  499. 

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

  501.             {

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

  503.                     ;

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

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

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

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

  508.                 else

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

  510.             }

  511. 

  512.             if(lineattr[x] & CUCUL_BLINK)

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

  514.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  516.             if(lineattr[x] & CUCUL_ITALICS)

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

  518.             if(lineattr[x] & CUCUL_BOLD)

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

  520. 

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

  522.         }

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

  524.     }

  525. 

  526.     /* Footer */

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

  528. 

  529.     /* Crop to really used size */

  530.     debug("html3 export: alloc %li bytes, realloc %li\n",

  531.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  534. 

  535.     return data;

  536. }

  537. 

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

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

  540. {

  541.     static uint8_t const palette[] =

  542.     {

  543.         1, 2, 3, 10, 5, 6, 7, 15, /* Dark */

  544.         14, 12, 9, 11, 4, 13, 8, 0, /* Light */

  545.     };

  546. 

  547.     char *data, *cur;

  548.     unsigned int x, y;

  549. 

  550.     /* 14 bytes assumed for max length per pixel. Worst case scenario:

  551.      * ^Cxx,yy   6 bytes

  552.      * ^B^B      2 bytes

  553.      * ch        6 bytes

  554.      * 3 bytes for max length per line. Worst case scenario:

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

  556.      * \r\n      2 bytes

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

  558.      */

  559. 

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

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

  562. 

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

  564.     {

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

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

  567. 

  568.         uint8_t prevfg = 0x10;

  569.         uint8_t prevbg = 0x10;

  570. 

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

  572.         {

  573.             uint32_t attr = lineattr[x];

  574.             uint32_t ch = linechar[x];

  575.             uint8_t ansifg, ansibg, fg, bg;

  576. 

  577.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  578.                 continue;

  579. 

  580.             ansifg = cucul_attr_to_ansi_fg(attr);

  581.             ansibg = cucul_attr_to_ansi_bg(attr);

  582. 

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

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

  585. 

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

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

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

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

  590.             {

  591.                 int need_escape = 0;

  592. 

  593.                 if(bg == 0x10)

  594.                 {

  595.                     if(fg == 0x10)

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

  597.                     else

  598.                     {

  599.                         if(prevbg == 0x10)

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

  601.                         else

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

  603. 

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

  605.                             need_escape = 1;

  606.                     }

  607.                 }

  608.                 else

  609.                 {

  610.                     if(fg == 0x10)

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

  612.                     else

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

  614.                 }

  615. 

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

  617.                     need_escape = 1;

  618. 

  619.                 if(need_escape)

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

  621.             }

  622. 

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

  624.             prevfg = fg;

  625.             prevbg = bg;

  626.         }

  627. 

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

  629.         if(!cv->width)

  630.             *cur++ = ' ';

  631. 

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

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

  634.     }

  635. 

  636.     /* Crop to really used size */

  637.     debug("IRC export: alloc %li bytes, realloc %li\n",

  638.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  641. 

  642.     return data;

  643. }

  644. 

  645. /* Export a PostScript document. */

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

  647. {

  648.     static char const *ps_header =

  649.         "%!\n"

  650.         "%% libcaca PDF export\n"

  651.         "%%LanguageLevel: 2\n"

  652.         "%%Pages: 1\n"

  653.         "%%DocumentData: Clean7Bit\n"

  654.         "/csquare {\n"

  655.         "  newpath\n"

  656.         "  0 0 moveto\n"

  657.         "  0 1 rlineto\n"

  658.         "  1 0 rlineto\n"

  659.         "  0 -1 rlineto\n"

  660.         "  closepath\n"

  661.         "  setrgbcolor\n"

  662.         "  fill\n"

  663.         "} def\n"

  664.         "/S {\n"

  665.         "  Show\n"

  666.         "} bind def\n"

  667.         "/Courier-Bold findfont\n"

  668.         "8 scalefont\n"

  669.         "setfont\n"

  670.         "gsave\n"

  671.         "6 10 scale\n";

  672. 

  673.     char *data, *cur;

  674.     unsigned int x, y;

  675. 

  676.     /* 200 is arbitrary but should be ok */

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

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

  679. 

  680.     /* Header */

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

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

  683. 

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

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

  686.     {

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

  688. 

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

  690.         {

  691.             uint8_t argb[8];

  692.             _cucul_attr_to_argb4(*lineattr++, argb);

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

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

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

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

  697.         }

  698. 

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

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

  701.     }

  702. 

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

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

  705. 

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

  707.     {

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

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

  710. 

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

  712.         {

  713.             uint8_t argb[8];

  714.             uint32_t ch = *linechar++;

  715. 

  716.             _cucul_attr_to_argb4(*lineattr++, argb);

  717. 

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

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

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

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

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

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

  724. 

  725.             if(ch < 0x00000020)

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

  727.             else if(ch >= 0x00000080)

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

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

  730.             {

  731.                 case '\\':

  732.                 case '(':

  733.                 case ')':

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

  735.                     break;

  736.                 default:

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

  738.                     break;

  739.             }

  740.         }

  741.     }

  742. 

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

  744. 

  745.     /* Crop to really used size */

  746.     debug("PS export: alloc %li bytes, realloc %li\n",

  747.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  750. 

  751.     return data;

  752. }

  753. 

  754. /* Export an SVG vector image */

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

  756. {

  757.     static char const svg_header[] =

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

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

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

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

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

  763. 

  764.     char *data, *cur;

  765.     unsigned int x, y;

  766. 

  767.     /* 200 is arbitrary but should be ok */

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

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

  770. 

  771.     /* Header */

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

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

  774. 

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

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

  777. 

  778.     /* Background */

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

  780.     {

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

  782. 

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

  784.         {

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

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

  787.                                 _cucul_attr_to_rgb12bg(*lineattr++),

  788.                                 x * 6, y * 10);

  789.         }

  790.     }

  791. 

  792.     /* Text */

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

  794.     {

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

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

  797. 

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

  799.         {

  800.             uint32_t ch = *linechar++;

  801. 

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

  803.             {

  804.                 lineattr++;

  805.                 continue;

  806.             }

  807. 

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

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

  810.                                 _cucul_attr_to_rgb12fg(*lineattr++),

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

  812. 

  813.             if(ch < 0x00000020)

  814.                 *cur++ = '?';

  815.             else if(ch > 0x0000007f)

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

  817.             else switch((uint8_t)ch)

  818.             {

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

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

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

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

  823.             }

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

  825.         }

  826.     }

  827. 

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

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

  830. 

  831.     /* Crop to really used size */

  832.     debug("SVG export: alloc %li bytes, realloc %li\n",

  833.           (long int)*bytes, (long int)(uintptr_t)(cur - data));

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

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

  836. 

  837.     return data;

  838. }

  839. 

  840. /* Export a TGA image */

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

  842. {

  843.     char const * const *fontlist;

  844.     char *data, *cur;

  845.     cucul_font_t *f;

  846.     unsigned int i, w, h;

  847. 

  848.     fontlist = cucul_get_font_list();

  849.     if(!fontlist[0])

  850.     {

  851. #if defined(HAVE_ERRNO_H)

  852.         errno = EINVAL;

  853. #endif

  854.         return NULL;

  855.     }

  856. 

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

  858. 

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

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

  861. 

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

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

  864. 

  865.     /* ID Length */

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

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

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

  869.     /* Image Type: uncompressed truecolor */

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

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

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

  873. 

  874.     /* Image Specification */

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

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

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

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

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

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

  881. 

  882.     /* Image ID: no ID */

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

  884. 

  885.     /* Image Data */

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

  887. 

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

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

  890.     {

  891.         char w;

  892.         w = cur[i]; cur[i] = cur[i + 3]; cur[i + 3] = w;

  893.         w = cur[i + 1]; cur[i + 1] = cur[i + 2]; cur[i + 2] = w;

  894.     }

  895. 

  896.     cucul_free_font(f);

  897. 

  898.     return data;

  899. }