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libcaca/cucul/export.c

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  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.     /* 44 bytes for the header:

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

  171.      *  - 16 bytes for the canvas header

  172.      *  - 24 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. /*

  208.  * The libcaca canvas format, version 1

  209.  * ------------------------------------

  210.  *

  211.  * All types are big endian.

  212.  *

  213.  * struct

  214.  * {

  215.  * magic:

  216.  *    uint8_t caca_header[2];    // "\xCA\xCA"

  217.  *    uint8_t caca_file_type[2]; // "CV"

  218.  *

  219.  * canvas_header:

  220.  *    uint32_t control_size;     // Control size (canvas_data - canvas_header)

  221.  *    uint32_t data_size;        // Data size (EOF - canvas_data)

  222.  *

  223.  *    uint16_t version;          // Canvas format version

  224.  *                               //  bit 0: set to 1 if canvas is compatible

  225.  *                               //         with version 1 of the format

  226.  *                               //  bits 1-15: unused yet, must be 0

  227.  *

  228.  *    uint32_t frames;           // Frame count

  229.  *

  230.  *    uint16_t flags;            // Feature flags

  231.  *                               //  bits 0-15: unused yet, must be 0

  232.  *

  233.  * frame_info:

  234.  *    struct

  235.  *    {

  236.  *       uint32_t width;         // Frame width

  237.  *       uint32_t height;        // Frame height

  238.  *       uint32_t duration;      // Frame duration in milliseconds, 0 to

  239.  *                               // not specify a duration

  240.  *       uint32_t attr;          // Graphics context attribute

  241.  *       int32_t cursor_x;       // Cursor X coordinate

  242.  *       int32_t cursor_y;       // Cursor Y coordinate

  243.  *       int32_t handle_x;       // Handle X coordinate

  244.  *       int32_t handle_y;       // Handle Y coordinate

  245.  *    }

  246.  *    frame_list[frames];

  247.  *

  248.  * control_extension_1:

  249.  * control_extension_2:

  250.  *    ...

  251.  * control_extension_N:

  252.  *    ...                        // reserved for future use

  253.  *

  254.  * canvas_data:

  255.  *    uint8_t data[data_size];   // canvas data

  256.  *

  257.  * data_extension_1:

  258.  * data_extension_2:

  259.  *    ...

  260.  * data_extension_N:

  261.  *    ...                        // reserved for future use

  262.  * };

  263.  */

  264. 

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

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

  267. {

  268.     static uint8_t const palette[] =

  269.     {

  270.         0,  4,  2,  6, 1,  5,  3,  7,

  271.         8, 12, 10, 14, 9, 13, 11, 15

  272.     };

  273. 

  274.     char *data, *cur;

  275.     unsigned int x, y;

  276. 

  277.     /* 23 bytes assumed for max length per pixel ('\e[5;1;3x;4y;9x;10ym' plus

  278.      * 4 max bytes for a UTF-8 character).

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

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

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

  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.         uint8_t prevfg = 0x10;

  289.         uint8_t prevbg = 0x10;

  290. 

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

  292.         {

  293.             uint32_t attr = lineattr[x];

  294.             uint32_t ch = linechar[x];

  295.             uint8_t ansifg, ansibg, fg, bg;

  296. 

  297.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  298.                 continue;

  299. 

  300.             ansifg = cucul_attr_to_ansi_fg(attr);

  301.             ansibg = cucul_attr_to_ansi_bg(attr);

  302. 

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

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

  305. 

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

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

  308.             {

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

  310. 

  311.                 if(fg < 8)

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

  313.                 else if(fg < 16)

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

  315. 

  316.                 if(bg < 8)

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

  318.                 else if(bg < 16)

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

  320. 

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

  322.             }

  323. 

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

  325. 

  326.             prevfg = fg;

  327.             prevbg = bg;

  328.         }

  329. 

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

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

  332. 

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

  334.     }

  335. 

  336.     /* Crop to really used size */

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

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

  339. 

  340.     return data;

  341. }

  342. 

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

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

  345. {

  346.     static uint8_t const palette[] =

  347.     {

  348.         0,  4,  2,  6, 1,  5,  3,  7,

  349.         8, 12, 10, 14, 9, 13, 11, 15

  350.     };

  351. 

  352.     char *data, *cur;

  353.     unsigned int x, y;

  354. 

  355.     uint8_t prevfg = -1;

  356.     uint8_t prevbg = -1;

  357. 

  358.     /* 16 bytes assumed for max length per pixel ('\e[5;1;3x;4ym' plus

  359.      * 1 byte for a CP437 character).

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

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

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

  363. 

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

  365.     {

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

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

  368. 

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

  370.         {

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

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

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

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

  375.             uint32_t ch = linechar[x];

  376. 

  377.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  378.                 ch = '?';

  379. 

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

  381.             {

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

  383. 

  384.                 if(fg < 8)

  385.                     if(bg < 8)

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

  387.                     else

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

  389.                 else

  390.                     if(bg < 8)

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

  392.                     else

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

  394.             }

  395. 

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

  397. 

  398.             prevfg = fg;

  399.             prevbg = bg;

  400.         }

  401. 

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

  403.         {

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

  405.         }

  406.         else

  407.         {

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

  409.             prevfg = -1;

  410.             prevbg = -1;

  411.         }

  412.     }

  413. 

  414.     /* Crop to really used size */

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

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

  417. 

  418.     return data;

  419. }

  420. 

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

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

  423. {

  424.     char *data, *cur;

  425.     unsigned int x, y, len;

  426. 

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

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

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

  430.      *          83 chars for ";font-weight..."

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

  432.      *          7 chars for "</span>" */

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

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

  435. 

  436.     /* HTML header */

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

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

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

  440. 

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

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

  443. 

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

  445.     {

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

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

  448. 

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

  450.         {

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

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

  453.                                 _cucul_attr_to_rgb12fg(lineattr[x]),

  454.                                 _cucul_attr_to_rgb12bg(lineattr[x]));

  455.             if(lineattr[x] & CUCUL_BOLD)

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

  457.             if(lineattr[x] & CUCUL_ITALICS)

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

  459.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  461.             if(lineattr[x] & CUCUL_BLINK)

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

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

  464. 

  465.             for(len = 0;

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

  467.                 len++)

  468.             {

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

  470.                     ;

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

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

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

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

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

  476.                 else

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

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

  479.             }

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

  481.         }

  482.         /* New line */

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

  484.     }

  485. 

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

  487. 

  488.     /* Crop to really used size */

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

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

  491. 

  492.     return data;

  493. }

  494. 

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

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

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

  498.  * correct header. */

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

  500. {

  501.     char *data, *cur;

  502.     unsigned int x, y, len;

  503. 

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

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

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

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

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

  509.      *          12 chars for "</font></td>" */

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

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

  512. 

  513.     /* Table */

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

  515.                         cv->height);

  516. 

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

  518.     {

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

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

  521. 

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

  523. 

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

  525.         {

  526.             unsigned int i;

  527. 

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

  529.              * (see below) */

  530.             len = 1;

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

  532.                 len++;

  533. 

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

  535.                            _cucul_attr_to_rgb24bg(lineattr[x]));

  536. 

  537.             if(len > 1)

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

  539. 

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

  541.                            _cucul_attr_to_rgb24fg(lineattr[x]));

  542. 

  543.             if(lineattr[x] & CUCUL_BOLD)

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

  545.             if(lineattr[x] & CUCUL_ITALICS)

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

  547.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  549.             if(lineattr[x] & CUCUL_BLINK)

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

  551. 

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

  553.             {

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

  555.                     ;

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

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

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

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

  560.                 else

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

  562.             }

  563. 

  564.             if(lineattr[x] & CUCUL_BLINK)

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

  566.             if(lineattr[x] & CUCUL_UNDERLINE)

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

  568.             if(lineattr[x] & CUCUL_ITALICS)

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

  570.             if(lineattr[x] & CUCUL_BOLD)

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

  572. 

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

  574.         }

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

  576.     }

  577. 

  578.     /* Footer */

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

  580. 

  581.     /* Crop to really used size */

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

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

  584. 

  585.     return data;

  586. }

  587. 

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

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

  590. {

  591.     static uint8_t const palette[] =

  592.     {

  593.         1, 2, 3, 10, 5, 6, 7, 15, /* Dark */

  594.         14, 12, 9, 11, 4, 13, 8, 0, /* Light */

  595.     };

  596. 

  597.     char *data, *cur;

  598.     unsigned int x, y;

  599. 

  600.     /* 14 bytes assumed for max length per pixel. Worst case scenario:

  601.      * ^Cxx,yy   6 bytes

  602.      * ^B^B      2 bytes

  603.      * ch        6 bytes

  604.      * 3 bytes for max length per line. Worst case scenario:

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

  606.      * \r\n      2 bytes

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

  608.      */

  609. 

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

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

  612. 

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

  614.     {

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

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

  617. 

  618.         uint8_t prevfg = 0x10;

  619.         uint8_t prevbg = 0x10;

  620. 

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

  622.         {

  623.             uint32_t attr = lineattr[x];

  624.             uint32_t ch = linechar[x];

  625.             uint8_t ansifg, ansibg, fg, bg;

  626. 

  627.             if(ch == CUCUL_MAGIC_FULLWIDTH)

  628.                 continue;

  629. 

  630.             ansifg = cucul_attr_to_ansi_fg(attr);

  631.             ansibg = cucul_attr_to_ansi_bg(attr);

  632. 

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

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

  635. 

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

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

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

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

  640.             {

  641.                 int need_escape = 0;

  642. 

  643.                 if(bg == 0x10)

  644.                 {

  645.                     if(fg == 0x10)

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

  647.                     else

  648.                     {

  649.                         if(prevbg == 0x10)

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

  651.                         else

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

  653. 

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

  655.                             need_escape = 1;

  656.                     }

  657.                 }

  658.                 else

  659.                 {

  660.                     if(fg == 0x10)

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

  662.                     else

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

  664.                 }

  665. 

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

  667.                     need_escape = 1;

  668. 

  669.                 if(need_escape)

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

  671.             }

  672. 

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

  674.             prevfg = fg;

  675.             prevbg = bg;

  676.         }

  677. 

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

  679.         if(!cv->width)

  680.             *cur++ = ' ';

  681. 

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

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

  684.     }

  685. 

  686.     /* Crop to really used size */

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

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

  689. 

  690.     return data;

  691. }

  692. 

  693. /* Export a PostScript document. */

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

  695. {

  696.     static char const *ps_header =

  697.         "%!\n"

  698.         "%% libcaca PDF export\n"

  699.         "%%LanguageLevel: 2\n"

  700.         "%%Pages: 1\n"

  701.         "%%DocumentData: Clean7Bit\n"

  702.         "/csquare {\n"

  703.         "  newpath\n"

  704.         "  0 0 moveto\n"

  705.         "  0 1 rlineto\n"

  706.         "  1 0 rlineto\n"

  707.         "  0 -1 rlineto\n"

  708.         "  closepath\n"

  709.         "  setrgbcolor\n"

  710.         "  fill\n"

  711.         "} def\n"

  712.         "/S {\n"

  713.         "  Show\n"

  714.         "} bind def\n"

  715.         "/Courier-Bold findfont\n"

  716.         "8 scalefont\n"

  717.         "setfont\n"

  718.         "gsave\n"

  719.         "6 10 scale\n";

  720. 

  721.     char *data, *cur;

  722.     unsigned int x, y;

  723. 

  724.     /* 200 is arbitrary but should be ok */

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

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

  727. 

  728.     /* Header */

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

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

  731. 

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

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

  734.     {

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

  736. 

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

  738.         {

  739.             uint8_t argb[8];

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

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

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

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

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

  745.         }

  746. 

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

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

  749.     }

  750. 

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

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

  753. 

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

  755.     {

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

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

  758. 

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

  760.         {

  761.             uint8_t argb[8];

  762.             uint32_t ch = *linechar++;

  763. 

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

  765. 

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

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

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

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

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

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

  772. 

  773.             if(ch < 0x00000020)

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

  775.             else if(ch >= 0x00000080)

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

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

  778.             {

  779.                 case '\\':

  780.                 case '(':

  781.                 case ')':

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

  783.                     break;

  784.                 default:

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

  786.                     break;

  787.             }

  788.         }

  789.     }

  790. 

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

  792. 

  793.     /* Crop to really used size */

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

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

  796. 

  797.     return data;

  798. }

  799. 

  800. /* Export an SVG vector image */

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

  802. {

  803.     static char const svg_header[] =

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

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

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

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

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

  809. 

  810.     char *data, *cur;

  811.     unsigned int x, y;

  812. 

  813.     /* 200 is arbitrary but should be ok */

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

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

  816. 

  817.     /* Header */

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

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

  820. 

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

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

  823. 

  824.     /* Background */

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

  826.     {

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

  828. 

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

  830.         {

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

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

  833.                                 _cucul_attr_to_rgb12bg(*lineattr++),

  834.                                 x * 6, y * 10);

  835.         }

  836.     }

  837. 

  838.     /* Text */

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

  840.     {

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

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

  843. 

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

  845.         {

  846.             uint32_t ch = *linechar++;

  847. 

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

  849.             {

  850.                 lineattr++;

  851.                 continue;

  852.             }

  853. 

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

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

  856.                                 _cucul_attr_to_rgb12fg(*lineattr++),

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

  858. 

  859.             if(ch < 0x00000020)

  860.                 *cur++ = '?';

  861.             else if(ch > 0x0000007f)

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

  863.             else switch((uint8_t)ch)

  864.             {

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

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

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

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

  869.             }

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

  871.         }

  872.     }

  873. 

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

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

  876. 

  877.     /* Crop to really used size */

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

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

  880. 

  881.     return data;

  882. }

  883. 

  884. /* Export a TGA image */

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

  886. {

  887.     char const * const *fontlist;

  888.     char *data, *cur;

  889.     cucul_font_t *f;

  890.     unsigned int i, w, h;

  891. 

  892.     fontlist = cucul_get_font_list();

  893.     if(!fontlist[0])

  894.     {

  895. #if defined(HAVE_ERRNO_H)

  896.         errno = EINVAL;

  897. #endif

  898.         return NULL;

  899.     }

  900. 

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

  902. 

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

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

  905. 

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

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

  908. 

  909.     /* ID Length */

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

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

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

  913.     /* Image Type: uncompressed truecolor */

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

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

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

  917. 

  918.     /* Image Specification */

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

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

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

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

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

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

  925. 

  926.     /* Image ID: no ID */

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

  928. 

  929.     /* Image Data */

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

  931. 

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

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

  934.     {

  935.         char w;

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

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

  938.     }

  939. 

  940.     cucul_free_font(f);

  941. 

  942.     return data;

  943. }