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libcaca
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libcaca/caca/driver/x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2012 Sam Hocevar <sam@hocevar.net>

  4.  *                2007 Ben Wiley Sittler <bsittler@gmail.com>

  5.  *                All Rights Reserved

  6.  *

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

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

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

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

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

  12.  */

  13. 

  14. /*

  15.  *  This file contains the libcaca X11 input and output driver

  16.  */

  17. 

  18. #include "config.h"

  19. 

  20. #if defined(USE_X11)

  21. 

  22. #include <X11/Xlib.h>

  23. #include <X11/Xutil.h>

  24. #include <X11/keysym.h>

  25. #if defined HAVE_X11_XKBLIB_H

  26. #   include <X11/XKBlib.h>

  27. #endif

  28. 

  29. #include <stdio.h> /* BUFSIZ */

  30. #include <stdlib.h>

  31. #include <string.h>

  32. #if defined HAVE_LOCALE_H

  33. #   include <locale.h>

  34. #endif

  35. 

  36. #include "caca.h"

  37. #include "caca.h"

  38. #include "caca_internals.h"

  39. 

  40. /*

  41.  * Local functions

  42.  */

  43. static int x11_error_handler(Display *, XErrorEvent *);

  44. static void x11_put_glyph(caca_display_t *, int, int, int, int, int,

  45.                           uint32_t, uint32_t);

  46. 

  47. struct driver_private

  48. {

  49.     Display *dpy;

  50.     Window window;

  51.     Pixmap pixmap;

  52.     GC gc;

  53.     long int event_mask;

  54.     int font_width, font_height;

  55.     int colors[4096];

  56. #if defined X_HAVE_UTF8_STRING

  57.     XFontSet font_set;

  58. #endif

  59.     Font font;

  60.     XFontStruct *font_struct;

  61.     int font_offset;

  62.     Cursor pointer;

  63.     Atom wm_protocols;

  64.     Atom wm_delete_window;

  65. #if defined HAVE_X11_XKBLIB_H

  66.     Bool autorepeat;

  67. #endif

  68.     uint32_t max_char;

  69.     int cursor_flags;

  70.     int dirty_cursor_x, dirty_cursor_y;

  71. #if defined X_HAVE_UTF8_STRING

  72.     XIM im;

  73.     XIC ic;

  74. #endif

  75. };

  76. 

  77. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  78. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  79. 

  80. static int x11_init_graphics(caca_display_t *dp)

  81. {

  82.     Colormap colormap;

  83.     XSetWindowAttributes x11_winattr;

  84. #if defined X_HAVE_UTF8_STRING

  85.     XVaNestedList list;

  86. #endif

  87.     int (*old_error_handler)(Display *, XErrorEvent *);

  88.     char const *fonts[] = { NULL, "8x13bold", "fixed", NULL }, **parser;

  89.     char const *geometry;

  90.     int width = caca_get_canvas_width(dp->cv);

  91.     int height = caca_get_canvas_height(dp->cv);

  92.     int i;

  93. 

  94.     dp->drv.p = malloc(sizeof(struct driver_private));

  95. 

  96. #if defined HAVE_GETENV

  97.     geometry = getenv("CACA_GEOMETRY");

  98.     if(geometry && *geometry)

  99.         sscanf(geometry, "%ux%u", &width, &height);

  100. #endif

  101. 

  102.     caca_add_dirty_rect(dp->cv, 0, 0, dp->cv->width, dp->cv->height);

  103.     dp->resize.allow = 1;

  104.     caca_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);

  105.     width = caca_get_canvas_width(dp->cv);

  106.     height = caca_get_canvas_height(dp->cv);

  107.     dp->resize.allow = 0;

  108. 

  109. #if defined HAVE_LOCALE_H

  110.     setlocale(LC_ALL, "");

  111. #endif

  112. 

  113.     dp->drv.p->dpy = XOpenDisplay(NULL);

  114.     if(dp->drv.p->dpy == NULL)

  115.         return -1;

  116. 

  117. #if defined HAVE_GETENV

  118.     fonts[0] = getenv("CACA_FONT");

  119.     if(fonts[0] && *fonts[0])

  120.         parser = fonts;

  121.     else

  122. #endif

  123.         parser = fonts + 1;

  124. 

  125.     /* Ignore font errors */

  126.     old_error_handler = XSetErrorHandler(x11_error_handler);

  127. 

  128.     /* Parse our font list */

  129.     for( ; ; parser++)

  130.     {

  131. #if defined X_HAVE_UTF8_STRING

  132.         char **missing_charset_list;

  133.         char *def_string;

  134.         int missing_charset_count;

  135. #endif

  136.         uint32_t font_max_char;

  137. 

  138.         if(!*parser)

  139.         {

  140.             XSetErrorHandler(old_error_handler);

  141.             XCloseDisplay(dp->drv.p->dpy);

  142.             return -1;

  143.         }

  144. 

  145. #if defined X_HAVE_UTF8_STRING

  146.         dp->drv.p->font_set = XCreateFontSet(dp->drv.p->dpy, *parser,

  147.                                              &missing_charset_list,

  148.                                              &missing_charset_count,

  149.                                              &def_string);

  150.         if (missing_charset_list)

  151.             XFreeStringList(missing_charset_list);

  152. 

  153.         if (!dp->drv.p->font_set || missing_charset_count)

  154.         {

  155.             char buf[BUFSIZ];

  156. 

  157.             if (dp->drv.p->font_set)

  158.                 XFreeFontSet(dp->drv.p->dpy, dp->drv.p->font_set);

  159.             snprintf(buf, BUFSIZ - 1, "%s,*", *parser);

  160.             dp->drv.p->font_set = XCreateFontSet(dp->drv.p->dpy, buf,

  161.                                                  &missing_charset_list,

  162.                                                  &missing_charset_count,

  163.                                                  &def_string);

  164.             if (missing_charset_list)

  165.                 XFreeStringList(missing_charset_list);

  166.         }

  167. 

  168.         if (dp->drv.p->font_set)

  169.             break;

  170. #endif

  171. 

  172.         dp->drv.p->font = XLoadFont(dp->drv.p->dpy, *parser);

  173.         if(!dp->drv.p->font)

  174.             continue;

  175. 

  176.         dp->drv.p->font_struct = XQueryFont(dp->drv.p->dpy, dp->drv.p->font);

  177.         if(!dp->drv.p->font_struct)

  178.         {

  179.             XUnloadFont(dp->drv.p->dpy, dp->drv.p->font);

  180.             continue;

  181.         }

  182. 

  183.         if((strlen(*parser) > sizeof(UNICODE_XLFD_SUFFIX))

  184.              && !strcasecmp(*parser + strlen(*parser)

  185.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

  186.             dp->drv.p->max_char = 0xffff;

  187.         else if((strlen(*parser) > sizeof(LATIN_1_XLFD_SUFFIX))

  188.                  && !strcasecmp(*parser + strlen(*parser)

  189.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

  190.             dp->drv.p->max_char = 0xff;

  191.         else

  192.             dp->drv.p->max_char = 0x7f;

  193. 

  194.         font_max_char =

  195.             (dp->drv.p->font_struct->max_byte1 << 8)

  196.              | dp->drv.p->font_struct->max_char_or_byte2;

  197.         if(font_max_char && (font_max_char < dp->drv.p->max_char))

  198.             dp->drv.p->max_char = font_max_char;

  199. 

  200.         break;

  201.     }

  202. 

  203.     /* Reset the default X11 error handler */

  204.     XSetErrorHandler(old_error_handler);

  205. 

  206.     /* Set font width to the largest character in the set */

  207. #if defined X_HAVE_UTF8_STRING

  208.     if (dp->drv.p->font_set)

  209.     {

  210.         /* Do not trust the fontset, because some fonts may have

  211.          * irrelevantly large glyphs. Pango and rxvt use the same method. */

  212.         static wchar_t const test[] =

  213.         {

  214.             '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',

  215.             0x00cd, 0x00e7, 0x00d5, 0x0114, 0x0177, /* Í ç Õ Ĕ ŷ */

  216.             /* 0x0643, */ /* ﻙ */

  217.             0x304c, 0x672c, /* が本 */

  218.             0,

  219.         };

  220. 

  221.         XRectangle ink, logical;

  222. 

  223.         dp->drv.p->font_width =

  224.              (XmbTextEscapement(dp->drv.p->font_set, "CAca", 4) + 2) / 4;

  225.         XwcTextExtents(dp->drv.p->font_set, test, sizeof(test) / sizeof(*test),

  226.                        &ink, &logical);

  227.         dp->drv.p->font_height = ink.height;

  228.         dp->drv.p->font_offset = ink.height + ink.y;

  229.     }

  230.     else

  231. #endif

  232.     {

  233.         dp->drv.p->font_width = 0;

  234.         if(dp->drv.p->font_struct->per_char

  235.             && !dp->drv.p->font_struct->min_byte1

  236.             && dp->drv.p->font_struct->min_char_or_byte2 <= 0x21

  237.             && dp->drv.p->font_struct->max_char_or_byte2 >= 0x7e)

  238.         {

  239.             for(i = 0x21; i < 0x7f; i++)

  240.             {

  241.                 int cw = dp->drv.p->font_struct->per_char[i

  242.                             - dp->drv.p->font_struct->min_char_or_byte2].width;

  243.                 if(cw > dp->drv.p->font_width)

  244.                     dp->drv.p->font_width = cw;

  245.             }

  246.         }

  247. 

  248.         if(!dp->drv.p->font_width)

  249.             dp->drv.p->font_width = dp->drv.p->font_struct->max_bounds.width;

  250. 

  251.         dp->drv.p->font_height = dp->drv.p->font_struct->max_bounds.ascent

  252.                                   + dp->drv.p->font_struct->max_bounds.descent;

  253.         dp->drv.p->font_offset = dp->drv.p->font_struct->max_bounds.descent;

  254.     }

  255. 

  256.     colormap = DefaultColormap(dp->drv.p->dpy, DefaultScreen(dp->drv.p->dpy));

  257.     for(i = 0x000; i < 0x1000; i++)

  258.     {

  259.         XColor color;

  260.         color.red = ((i & 0xf00) >> 8) * 0x1111;

  261.         color.green = ((i & 0x0f0) >> 4) * 0x1111;

  262.         color.blue = (i & 0x00f) * 0x1111;

  263.         XAllocColor(dp->drv.p->dpy, colormap, &color);

  264.         dp->drv.p->colors[i] = color.pixel;

  265.     }

  266. 

  267.     x11_winattr.backing_store = Always;

  268.     x11_winattr.background_pixel = dp->drv.p->colors[0x000];

  269.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  270. 

  271.     dp->drv.p->window =

  272.         XCreateWindow(dp->drv.p->dpy, DefaultRootWindow(dp->drv.p->dpy), 0, 0,

  273.                       width * dp->drv.p->font_width,

  274.                       height * dp->drv.p->font_height,

  275.                       0, 0, InputOutput, 0,

  276.                       CWBackingStore | CWBackPixel | CWEventMask,

  277.                       &x11_winattr);

  278. 

  279.     dp->drv.p->wm_protocols =

  280.         XInternAtom(dp->drv.p->dpy, "WM_PROTOCOLS", True);

  281.     dp->drv.p->wm_delete_window =

  282.         XInternAtom(dp->drv.p->dpy, "WM_DELETE_WINDOW", True);

  283. 

  284.     if(dp->drv.p->wm_protocols != None && dp->drv.p->wm_delete_window != None)

  285.         XSetWMProtocols(dp->drv.p->dpy, dp->drv.p->window,

  286.                         &dp->drv.p->wm_delete_window, 1);

  287. 

  288.     XStoreName(dp->drv.p->dpy, dp->drv.p->window, "caca for X");

  289. 

  290.     XSelectInput(dp->drv.p->dpy, dp->drv.p->window, StructureNotifyMask);

  291.     XMapWindow(dp->drv.p->dpy, dp->drv.p->window);

  292. 

  293.     dp->drv.p->gc = XCreateGC(dp->drv.p->dpy, dp->drv.p->window, 0, NULL);

  294.     XSetForeground(dp->drv.p->dpy, dp->drv.p->gc, dp->drv.p->colors[0x888]);

  295. #if defined X_HAVE_UTF8_STRING

  296.     if (!dp->drv.p->font_set)

  297. #endif

  298.         XSetFont(dp->drv.p->dpy, dp->drv.p->gc, dp->drv.p->font);

  299. 

  300.     for(;;)

  301.     {

  302.         XEvent xevent;

  303.         XNextEvent(dp->drv.p->dpy, &xevent);

  304.         if(xevent.type == MapNotify)

  305.             break;

  306.     }

  307. 

  308. #if defined HAVE_X11_XKBLIB_H

  309.     /* Disable autorepeat */

  310.     XkbSetDetectableAutoRepeat(dp->drv.p->dpy, True, &dp->drv.p->autorepeat);

  311.     if(!dp->drv.p->autorepeat)

  312.         XAutoRepeatOff(dp->drv.p->dpy);

  313. #endif

  314. 

  315.     dp->drv.p->event_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask

  316.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  317.           | ExposureMask;

  318. 

  319.     XSelectInput(dp->drv.p->dpy, dp->drv.p->window, dp->drv.p->event_mask);

  320. 

  321.     XSync(dp->drv.p->dpy, False);

  322. 

  323.     dp->drv.p->pixmap = XCreatePixmap(dp->drv.p->dpy, dp->drv.p->window,

  324.                                       width * dp->drv.p->font_width,

  325.                                       height * dp->drv.p->font_height,

  326.                                       DefaultDepth(dp->drv.p->dpy,

  327.                                       DefaultScreen(dp->drv.p->dpy)));

  328.     dp->drv.p->pointer = None;

  329. 

  330.     dp->drv.p->cursor_flags = 0;

  331.     dp->drv.p->dirty_cursor_x = -1;

  332.     dp->drv.p->dirty_cursor_y = -1;

  333. 

  334. #if defined X_HAVE_UTF8_STRING

  335.     list = XVaCreateNestedList(0, XNFontSet, dp->drv.p->font_set, NULL);

  336.     dp->drv.p->im = XOpenIM(dp->drv.p->dpy, NULL, NULL, NULL);

  337.     dp->drv.p->ic = XCreateIC(dp->drv.p->im,

  338.                           XNInputStyle, XIMPreeditNothing | XIMStatusNothing,

  339.                           XNClientWindow, dp->drv.p->window,

  340.                           XNPreeditAttributes, list,

  341.                           XNStatusAttributes, list,

  342.                           NULL);

  343. #endif

  344. 

  345.     return 0;

  346. }

  347. 

  348. static int x11_end_graphics(caca_display_t *dp)

  349. {

  350.     XSync(dp->drv.p->dpy, False);

  351. #if defined HAVE_X11_XKBLIB_H

  352.     if(!dp->drv.p->autorepeat)

  353.         XAutoRepeatOn(dp->drv.p->dpy);

  354. #endif

  355.     XFreePixmap(dp->drv.p->dpy, dp->drv.p->pixmap);

  356. #if defined X_HAVE_UTF8_STRING

  357.     if (dp->drv.p->font_set)

  358.         XFreeFontSet(dp->drv.p->dpy, dp->drv.p->font_set);

  359.     else

  360. #endif

  361.         XFreeFont(dp->drv.p->dpy, dp->drv.p->font_struct);

  362.     XFreeGC(dp->drv.p->dpy, dp->drv.p->gc);

  363.     XUnmapWindow(dp->drv.p->dpy, dp->drv.p->window);

  364.     XDestroyWindow(dp->drv.p->dpy, dp->drv.p->window);

  365. #if defined X_HAVE_UTF8_STRING

  366.     XDestroyIC(dp->drv.p->ic);

  367.     XCloseIM(dp->drv.p->im);

  368. #endif

  369.     XCloseDisplay(dp->drv.p->dpy);

  370. 

  371.     free(dp->drv.p);

  372. 

  373.     return 0;

  374. }

  375. 

  376. static int x11_set_display_title(caca_display_t *dp, char const *title)

  377. {

  378.     XStoreName(dp->drv.p->dpy, dp->drv.p->window, title);

  379.     return 0;

  380. }

  381. 

  382. static int x11_get_display_width(caca_display_t const *dp)

  383. {

  384.     return caca_get_canvas_width(dp->cv) * dp->drv.p->font_width;

  385. }

  386. 

  387. static int x11_get_display_height(caca_display_t const *dp)

  388. {

  389.     return caca_get_canvas_height(dp->cv) * dp->drv.p->font_height;

  390. }

  391. 

  392. static void x11_display(caca_display_t *dp)

  393. {

  394.     uint32_t const *cvchars = caca_get_canvas_chars(dp->cv);

  395.     uint32_t const *cvattrs = caca_get_canvas_attrs(dp->cv);

  396.     int width = caca_get_canvas_width(dp->cv);

  397.     int height = caca_get_canvas_height(dp->cv);

  398.     int x, y, i, len;

  399. 

  400.     /* XXX: the magic value -1 is used to handle the cursor area */

  401.     for(i = -1; i < caca_get_dirty_rect_count(dp->cv); i++)

  402.     {

  403.         int dx, dy, dw, dh;

  404. 

  405.         /* Get the dirty rectangle coordinates, either from the previous

  406.          * cursor position, or from the canvas's list. */

  407.         if(i == -1)

  408.         {

  409.             if(dp->drv.p->dirty_cursor_x < 0 || dp->drv.p->dirty_cursor_y < 0

  410.                 || dp->drv.p->dirty_cursor_x >= width

  411.                 || dp->drv.p->dirty_cursor_y >= height)

  412.                 continue;

  413. 

  414.             dx = dp->drv.p->dirty_cursor_x;

  415.             dy = dp->drv.p->dirty_cursor_y;

  416.             dw = dh = 1;

  417. 

  418.             dp->drv.p->dirty_cursor_x = -1;

  419.             dp->drv.p->dirty_cursor_y = -1;

  420.         }

  421.         else

  422.         {

  423.             caca_get_dirty_rect(dp->cv, i, &dx, &dy, &dw, &dh);

  424.         }

  425. 

  426.         /* First draw the background colours. Splitting the process in two

  427.          * loops like this is actually slightly faster. */

  428.         for(y = dy; y < dy + dh; y++)

  429.         {

  430.             for(x = dx; x < dx + dw; x += len)

  431.             {

  432.                 uint32_t const *attrs = cvattrs + x + y * width;

  433.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  434. 

  435.                 len = 1;

  436.                 while(x + len < dx + dw

  437.                        && caca_attr_to_rgb12_bg(attrs[len]) == bg)

  438.                     len++;

  439. 

  440.                 XSetForeground(dp->drv.p->dpy, dp->drv.p->gc,

  441.                                dp->drv.p->colors[bg]);

  442.                 XFillRectangle(dp->drv.p->dpy, dp->drv.p->pixmap,

  443.                                dp->drv.p->gc,

  444.                                x * dp->drv.p->font_width,

  445.                                y * dp->drv.p->font_height,

  446.                                len * dp->drv.p->font_width,

  447.                                dp->drv.p->font_height);

  448.             }

  449.         }

  450. 

  451.         /* Then print the foreground characters */

  452.         for(y = dy; y < dy + dh; y++)

  453.         {

  454.             int yoff = (y + 1) * dp->drv.p->font_height

  455.                                         - dp->drv.p->font_offset;

  456.             uint32_t const *chars = cvchars + dx + y * width;

  457.             uint32_t const *attrs = cvattrs + dx + y * width;

  458. 

  459.             for(x = dx; x < dx + dw; x++, chars++, attrs++)

  460.             {

  461.                 XSetForeground(dp->drv.p->dpy, dp->drv.p->gc,

  462.                            dp->drv.p->colors[caca_attr_to_rgb12_fg(*attrs)]);

  463. 

  464.                 x11_put_glyph(dp, x * dp->drv.p->font_width,

  465.                               y * dp->drv.p->font_height, yoff,

  466.                               dp->drv.p->font_width, dp->drv.p->font_height,

  467.                               *attrs, *chars);

  468.             }

  469.         }

  470.     }

  471. 

  472.     /* Print the cursor if necessary. */

  473.     if(dp->drv.p->cursor_flags)

  474.     {

  475.         XSetForeground(dp->drv.p->dpy, dp->drv.p->gc,

  476.                        dp->drv.p->colors[0xfff]);

  477.         x = caca_wherex(dp->cv);

  478.         y = caca_wherey(dp->cv);

  479.         XFillRectangle(dp->drv.p->dpy, dp->drv.p->pixmap, dp->drv.p->gc,

  480.                        x * dp->drv.p->font_width, y * dp->drv.p->font_height,

  481.                        dp->drv.p->font_width, dp->drv.p->font_height);

  482. 

  483.         /* Mark the area as dirty */

  484.         dp->drv.p->dirty_cursor_x = x;

  485.         dp->drv.p->dirty_cursor_y = y;

  486.     }

  487. 

  488.     XCopyArea(dp->drv.p->dpy, dp->drv.p->pixmap, dp->drv.p->window,

  489.               dp->drv.p->gc, 0, 0,

  490.               width * dp->drv.p->font_width,

  491.               height * dp->drv.p->font_height,

  492.               0, 0);

  493.     XFlush(dp->drv.p->dpy);

  494. }

  495. 

  496. static void x11_handle_resize(caca_display_t *dp)

  497. {

  498.     Pixmap new_pixmap;

  499. 

  500.     new_pixmap = XCreatePixmap(dp->drv.p->dpy, dp->drv.p->window,

  501.                                dp->resize.w * dp->drv.p->font_width,

  502.                                dp->resize.h * dp->drv.p->font_height,

  503.                                DefaultDepth(dp->drv.p->dpy,

  504.                                             DefaultScreen(dp->drv.p->dpy)));

  505.     XCopyArea(dp->drv.p->dpy, dp->drv.p->pixmap, new_pixmap,

  506.               dp->drv.p->gc, 0, 0,

  507.               dp->resize.w * dp->drv.p->font_width,

  508.               dp->resize.h * dp->drv.p->font_height, 0, 0);

  509.     XFreePixmap(dp->drv.p->dpy, dp->drv.p->pixmap);

  510.     dp->drv.p->pixmap = new_pixmap;

  511. }

  512. 

  513. static int x11_get_event(caca_display_t *dp, caca_privevent_t *ev)

  514. {

  515.     int width = caca_get_canvas_width(dp->cv);

  516.     int height = caca_get_canvas_height(dp->cv);

  517.     XEvent xevent;

  518.     char key;

  519. 

  520.     while(XCheckWindowEvent(dp->drv.p->dpy, dp->drv.p->window,

  521.                             dp->drv.p->event_mask, &xevent) == True)

  522.     {

  523.         KeySym keysym;

  524. #if defined X_HAVE_UTF8_STRING

  525.         int len;

  526. #endif

  527. 

  528.         /* Expose event */

  529.         if(xevent.type == Expose)

  530.         {

  531.             XCopyArea(dp->drv.p->dpy, dp->drv.p->pixmap,

  532.                       dp->drv.p->window, dp->drv.p->gc, 0, 0,

  533.                       width * dp->drv.p->font_width,

  534.                       height * dp->drv.p->font_height, 0, 0);

  535.             continue;

  536.         }

  537. 

  538.         /* Resize event */

  539.         if(xevent.type == ConfigureNotify)

  540.         {

  541.             int w, h;

  542. 

  543.             w = (xevent.xconfigure.width + dp->drv.p->font_width / 3)

  544.                   / dp->drv.p->font_width;

  545.             h = (xevent.xconfigure.height + dp->drv.p->font_height / 3)

  546.                   / dp->drv.p->font_height;

  547. 

  548.             if(!w || !h || (w == width && h == height))

  549.                 continue;

  550. 

  551.             dp->resize.w = w;

  552.             dp->resize.h = h;

  553.             dp->resize.resized = 1;

  554. 

  555.             continue;

  556.         }

  557. 

  558.         /* Check for mouse motion events */

  559.         if(xevent.type == MotionNotify)

  560.         {

  561.             int newx = xevent.xmotion.x / dp->drv.p->font_width;

  562.             int newy = xevent.xmotion.y / dp->drv.p->font_height;

  563. 

  564.             if(newx >= width)

  565.                 newx = width - 1;

  566.             if(newy >= height)

  567.                 newy = height - 1;

  568. 

  569.             if(dp->mouse.x == newx && dp->mouse.y == newy)

  570.                 continue;

  571. 

  572.             dp->mouse.x = newx;

  573.             dp->mouse.y = newy;

  574. 

  575.             ev->type = CACA_EVENT_MOUSE_MOTION;

  576.             ev->data.mouse.x = dp->mouse.x;

  577.             ev->data.mouse.y = dp->mouse.y;

  578.             return 1;

  579.         }

  580. 

  581.         /* Check for mouse press and release events */

  582.         if(xevent.type == ButtonPress)

  583.         {

  584.             ev->type = CACA_EVENT_MOUSE_PRESS;

  585.             ev->data.mouse.button = ((XButtonEvent *)&xevent)->button;

  586.             return 1;

  587.         }

  588. 

  589.         if(xevent.type == ButtonRelease)

  590.         {

  591.             ev->type = CACA_EVENT_MOUSE_RELEASE;

  592.             ev->data.mouse.button = ((XButtonEvent *)&xevent)->button;

  593.             return 1;

  594.         }

  595. 

  596.         /* Check for key press and release events */

  597.         if(xevent.type == KeyPress)

  598.             ev->type = CACA_EVENT_KEY_PRESS;

  599.         else if(xevent.type == KeyRelease)

  600.             ev->type = CACA_EVENT_KEY_RELEASE;

  601.         else

  602.             continue;

  603. 

  604.         if(XFilterEvent(&xevent, None) == True)

  605.             continue;

  606. 

  607. #if defined X_HAVE_UTF8_STRING

  608.         len = Xutf8LookupString(dp->drv.p->ic, &xevent.xkey,

  609.                                 ev->data.key.utf8, 8, NULL, NULL);

  610.         ev->data.key.utf8[len] = 0;

  611.         if (len)

  612.         {

  613.             ev->data.key.utf32 = caca_utf8_to_utf32(ev->data.key.utf8, NULL);

  614.             if(ev->data.key.utf32 <= 0xff)

  615.                 ev->data.key.ch = ev->data.key.utf32;

  616.             else

  617.                 ev->data.key.ch = 0;

  618.             return 1;

  619.         }

  620. #endif

  621.         if(XLookupString(&xevent.xkey, &key, 1, NULL, NULL))

  622.         {

  623.             ev->data.key.ch = key;

  624.             ev->data.key.utf32 = key;

  625.             ev->data.key.utf8[0] = key;

  626.             ev->data.key.utf8[1] = '\0';

  627.             return 1;

  628.         }

  629. 

  630.         keysym = XKeycodeToKeysym(dp->drv.p->dpy, xevent.xkey.keycode, 0);

  631.         switch(keysym)

  632.         {

  633.             case XK_F1:    ev->data.key.ch = CACA_KEY_F1;    break;

  634.             case XK_F2:    ev->data.key.ch = CACA_KEY_F2;    break;

  635.             case XK_F3:    ev->data.key.ch = CACA_KEY_F3;    break;

  636.             case XK_F4:    ev->data.key.ch = CACA_KEY_F4;    break;

  637.             case XK_F5:    ev->data.key.ch = CACA_KEY_F5;    break;

  638.             case XK_F6:    ev->data.key.ch = CACA_KEY_F6;    break;

  639.             case XK_F7:    ev->data.key.ch = CACA_KEY_F7;    break;

  640.             case XK_F8:    ev->data.key.ch = CACA_KEY_F8;    break;

  641.             case XK_F9:    ev->data.key.ch = CACA_KEY_F9;    break;

  642.             case XK_F10:   ev->data.key.ch = CACA_KEY_F10;   break;

  643.             case XK_F11:   ev->data.key.ch = CACA_KEY_F11;   break;

  644.             case XK_F12:   ev->data.key.ch = CACA_KEY_F12;   break;

  645.             case XK_F13:   ev->data.key.ch = CACA_KEY_F13;   break;

  646.             case XK_F14:   ev->data.key.ch = CACA_KEY_F14;   break;

  647.             case XK_F15:   ev->data.key.ch = CACA_KEY_F15;   break;

  648.             case XK_Left:  ev->data.key.ch = CACA_KEY_LEFT;  break;

  649.             case XK_Right: ev->data.key.ch = CACA_KEY_RIGHT; break;

  650.             case XK_Up:    ev->data.key.ch = CACA_KEY_UP;    break;

  651.             case XK_Down:  ev->data.key.ch = CACA_KEY_DOWN;  break;

  652.             case XK_KP_Page_Up:

  653.             case XK_Page_Up:      ev->data.key.ch = CACA_KEY_PAGEUP;   break;

  654.             case XK_KP_Page_Down:

  655.             case XK_Page_Down:    ev->data.key.ch = CACA_KEY_PAGEDOWN; break;

  656.             case XK_KP_Home:

  657.             case XK_Home:         ev->data.key.ch = CACA_KEY_HOME;     break;

  658.             case XK_KP_End:

  659.             case XK_End:          ev->data.key.ch = CACA_KEY_END;      break;

  660. 

  661.             default: ev->type = CACA_EVENT_NONE; return 0;

  662.         }

  663. 

  664.         ev->data.key.utf32 = 0;

  665.         ev->data.key.utf8[0] = '\0';

  666.         return 1;

  667.     }

  668. 

  669.     while(XCheckTypedEvent(dp->drv.p->dpy, ClientMessage, &xevent))

  670.     {

  671.         if(xevent.xclient.message_type != dp->drv.p->wm_protocols)

  672.             continue;

  673. 

  674.         if((Atom)xevent.xclient.data.l[0] == dp->drv.p->wm_delete_window)

  675.         {

  676.             ev->type = CACA_EVENT_QUIT;

  677.             return 1;

  678.         }

  679.     }

  680. 

  681.     ev->type = CACA_EVENT_NONE;

  682.     return 0;

  683. }

  684. 

  685. static void x11_set_mouse(caca_display_t *dp, int flags)

  686. {

  687.     Cursor no_ptr;

  688.     Pixmap bm_no;

  689.     XColor black, dummy;

  690.     Colormap colormap;

  691.     static char const empty[] = { 0, 0, 0, 0, 0, 0, 0, 0 };

  692. 

  693.     if(flags)

  694.     {

  695.         XDefineCursor(dp->drv.p->dpy,dp->drv.p->window, 0);

  696.         return;

  697.     }

  698. 

  699.     colormap = DefaultColormap(dp->drv.p->dpy, DefaultScreen(dp->drv.p->dpy));

  700.     if(!XAllocNamedColor(dp->drv.p->dpy, colormap, "black", &black, &dummy))

  701.     {

  702.         return;

  703.     }

  704.     bm_no = XCreateBitmapFromData(dp->drv.p->dpy, dp->drv.p->window,

  705.                                   empty, 8, 8);

  706.     no_ptr = XCreatePixmapCursor(dp->drv.p->dpy, bm_no, bm_no,

  707.                                  &black, &black, 0, 0);

  708.     XDefineCursor(dp->drv.p->dpy, dp->drv.p->window, no_ptr);

  709.     XFreeCursor(dp->drv.p->dpy, no_ptr);

  710.     if(bm_no != None)

  711.         XFreePixmap(dp->drv.p->dpy, bm_no);

  712.     XFreeColors(dp->drv.p->dpy, colormap, &black.pixel, 1, 0);

  713. 

  714.     XSync(dp->drv.p->dpy, False);

  715. }

  716. 

  717. static void x11_set_cursor(caca_display_t *dp, int flags)

  718. {

  719.     dp->drv.p->cursor_flags = flags;

  720. }

  721. 

  722. /*

  723.  * XXX: following functions are local

  724.  */

  725. 

  726. static int x11_error_handler(Display *dpy, XErrorEvent *xevent)

  727. {

  728.     /* Ignore the error */

  729.     return 0;

  730. }

  731. 

  732. static void x11_put_glyph(caca_display_t *dp, int x, int y, int yoff,

  733.                           int w, int h, uint32_t attr, uint32_t ch)

  734. {

  735.     static uint8_t const udlr[] =

  736.     {

  737.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  738.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  739.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  740.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  741.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  742.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  743.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  744.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  745.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  746.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  747.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  748.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  749.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  750.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  751.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  752.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  753.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  754.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  755.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  756.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  757.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  758.     };

  759. 

  760.     Display *dpy = dp->drv.p->dpy;

  761.     Pixmap px = dp->drv.p->pixmap;

  762.     GC gc = dp->drv.p->gc;

  763.     int fw;

  764. 

  765.     /* Underline */

  766.     if(attr & CACA_UNDERLINE)

  767.         XFillRectangle(dpy, px, gc, x, y + h - 1, w, 1);

  768. 

  769.     /* Skip spaces and magic stuff */

  770.     if(ch <= 0x00000020)

  771.         return;

  772. 

  773.     if(ch == CACA_MAGIC_FULLWIDTH)

  774.         return;

  775. 

  776.     fw = w;

  777.     if(caca_utf32_is_fullwidth(ch))

  778.         fw *= 2;

  779. 

  780.     /* We want to be able to print a few special Unicode characters

  781.      * such as the CP437 gradients and half blocks. For unknown

  782.      * characters, print what caca_utf32_to_ascii() returns. */

  783. 

  784.     if(ch >= 0x2500 && ch <= 0x256c && udlr[ch - 0x2500])

  785.     {

  786.         uint16_t D = udlr[ch - 0x2500];

  787. 

  788.         if(D & 0x04)

  789.             XFillRectangle(dpy, px, gc, x, y + h / 2, fw / 2 + 1, 1);

  790. 

  791.         if(D & 0x01)

  792.             XFillRectangle(dpy, px, gc,

  793.                            x + fw / 2, y + h / 2, (fw + 1) / 2, 1);

  794. 

  795.         if(D & 0x40)

  796.             XFillRectangle(dpy, px, gc, x + fw / 2, y, 1, h / 2 + 1);

  797. 

  798.         if(D & 0x10)

  799.             XFillRectangle(dpy, px, gc, x + fw / 2, y + h / 2, 1, (h + 1) / 2);

  800. 

  801. #define STEPIF(a,b) (D&(a)?-1:(D&(b))?1:0)

  802. 

  803.         if(D & 0x08)

  804.         {

  805.             XFillRectangle(dpy, px, gc, x, y - 1 + h / 2,

  806.                            fw / 2 + 1 + STEPIF(0xc0,0x20), 1);

  807.             XFillRectangle(dpy, px, gc, x, y + 1 + h / 2,

  808.                            fw / 2 + 1 + STEPIF(0x30,0x80), 1);

  809.         }

  810. 

  811.         if(D & 0x02)

  812.         {

  813.             XFillRectangle(dpy, px, gc, x - STEPIF(0xc0,0x20) + fw / 2,

  814.                            y - 1 + h / 2, (fw + 1) / 2 + STEPIF(0xc0,0x20), 1);

  815.             XFillRectangle(dpy, px, gc, x - STEPIF(0x30,0x80) + fw / 2,

  816.                            y + 1 + h / 2, (fw + 1) / 2 + STEPIF(0x30,0x80), 1);

  817.         }

  818. 

  819.         if(D & 0x80)

  820.         {

  821.             XFillRectangle(dpy, px, gc, x - 1 + fw / 2, y,

  822.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

  823.             XFillRectangle(dpy, px, gc, x + 1 + fw / 2, y,

  824.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  825.         }

  826. 

  827.         if(D & 0x20)

  828.         {

  829.             XFillRectangle(dpy, px, gc, x - 1 + fw / 2,

  830.                            y - STEPIF(0x0c,0x02) + h / 2,

  831.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

  832.             XFillRectangle(dpy, px, gc, x + 1 + fw / 2,

  833.                            y - STEPIF(0x03,0x08) + h / 2,

  834.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  835.         }

  836. 

  837.         return;

  838.     }

  839. 

  840.     switch(ch)

  841.     {

  842.         case 0x000000b7: /* · */

  843.         case 0x00002219: /* ∙ */

  844.         case 0x000030fb: /* ・ */

  845.             XFillRectangle(dpy, px, gc, x + fw / 2 - 1, y + h / 2 - 1, 2, 2);

  846.             return;

  847. 

  848.         case 0x00002261: /* ≡ */

  849.             XFillRectangle(dpy, px, gc, x + 1, y - 2 + h / 2, fw - 1, 1);

  850.             XFillRectangle(dpy, px, gc, x + 1, y + h / 2, fw - 1, 1);

  851.             XFillRectangle(dpy, px, gc, x + 1, y + 2 + h / 2, fw - 1, 1);

  852.             return;

  853. 

  854.         case 0x00002580: /* ▀ */

  855.             XFillRectangle(dpy, px, gc, x, y, fw, h / 2);

  856.             return;

  857. 

  858.         case 0x00002584: /* ▄ */

  859.             XFillRectangle(dpy, px, gc, x, y + h - h / 2, fw, h / 2);

  860.             return;

  861. 

  862.         case 0x00002588: /* █ */

  863.         case 0x000025ae: /* ▮ */

  864.             XFillRectangle(dpy, px, gc, x, y, fw, h);

  865.             return;

  866. 

  867.         case 0x0000258c: /* ▌ */

  868.             XFillRectangle(dpy, px, gc, x, y, fw / 2, h);

  869.             return;

  870. 

  871.         case 0x00002590: /* ▐ */

  872.             XFillRectangle(dpy, px, gc, x + fw - fw / 2, y, fw / 2, h);

  873.             return;

  874. 

  875.         case 0x000025a0: /* ■ */

  876.         case 0x000025ac: /* ▬ */

  877.             XFillRectangle(dpy, px, gc, x, y + h / 4, fw, h / 2);

  878.             return;

  879. 

  880.         case 0x00002593: /* ▓ */

  881.         case 0x00002592: /* ▒ */

  882.         case 0x00002591: /* ░ */

  883.         {

  884.             /* FIXME: this sucks utterly */

  885.             int i, j, k = ch - 0x00002591;

  886.             for(j = h; j--; )

  887.                 for(i = fw; i--; )

  888.             {

  889.                 if(((i + 2 * (j & 1)) & 3) > k)

  890.                     continue;

  891. 

  892.                 XDrawPoint(dpy, px, gc, x + i, y + j);

  893.             }

  894.             return;

  895.         }

  896. 

  897.         case 0x000025cb: /* ○ */

  898.         case 0x00002022: /* • */

  899.         case 0x000025cf: /* ● */

  900.         {

  901.             int d, xo, yo;

  902. 

  903.             d = fw >> (~ch & 0x1); /* XXX: hack */

  904.             if(h < fw)

  905.                 d = h;

  906.             if(d < 1)

  907.                 d = 1;

  908.             xo = (fw - d) / 2;

  909.             yo = (h - d) / 2;

  910.             if(ch == 0x000025cb)

  911.                 XDrawArc(dpy, px, gc, x + xo, y + yo, d, d, 0, 64 * 360);

  912.             else

  913.                 XFillArc(dpy, px, gc, x + xo, y + yo, d, d, 0, 64 * 360);

  914.             return;

  915.         }

  916.     }

  917. 

  918. #if defined X_HAVE_UTF8_STRING

  919.     if (dp->drv.p->font_set)

  920.     {

  921.         wchar_t wch = ch;

  922.         XwcDrawString(dpy, px, dp->drv.p->font_set, gc, x, yoff, &wch, 1);

  923.     }

  924.     else

  925. #endif

  926.     {

  927.         XChar2b ch16;

  928. 

  929. #if !defined X_HAVE_UTF8_STRING

  930.         if(ch > dp->drv.p->max_char)

  931.         {

  932.             ch16.byte1 = 0;

  933.             ch16.byte2 = caca_utf32_to_ascii(ch);

  934.         }

  935.         else

  936. #endif

  937.         {

  938.             ch16.byte1 = (uint8_t)(ch >> 8);

  939.             ch16.byte2 = (uint8_t)ch;

  940.         }

  941. 

  942.         XDrawString16(dpy, px, gc, x, yoff, &ch16, 1);

  943.     }

  944. }

  945. 

  946. /*

  947.  * Driver initialisation

  948.  */

  949. 

  950. int x11_install(caca_display_t *dp)

  951. {

  952. #if defined HAVE_GETENV

  953.     if(!getenv("DISPLAY") || !*(getenv("DISPLAY")))

  954.         return -1;

  955. #endif

  956. 

  957.     dp->drv.id = CACA_DRIVER_X11;

  958.     dp->drv.driver = "x11";

  959. 

  960.     dp->drv.init_graphics = x11_init_graphics;

  961.     dp->drv.end_graphics = x11_end_graphics;

  962.     dp->drv.set_display_title = x11_set_display_title;

  963.     dp->drv.get_display_width = x11_get_display_width;

  964.     dp->drv.get_display_height = x11_get_display_height;

  965.     dp->drv.display = x11_display;

  966.     dp->drv.handle_resize = x11_handle_resize;

  967.     dp->drv.get_event = x11_get_event;

  968.     dp->drv.set_mouse = x11_set_mouse;

  969.     dp->drv.set_cursor = x11_set_cursor;

  970. 

  971.     return 0;

  972. }

  973. 

  974. #endif /* USE_X11 */