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libcaca/caca/driver/x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2014 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://www.wtfpl.net/ 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_internals.h"

  38. 

  39. /*

  40.  * Local functions

  41.  */

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

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

  44.                           uint32_t, uint32_t);

  45. 

  46. struct driver_private

  47. {

  48.     Display *dpy;

  49.     Window window;

  50.     Pixmap pixmap;

  51.     GC gc;

  52.     long int event_mask;

  53.     int font_width, font_height;

  54.     int colors[4096];

  55. #if defined X_HAVE_UTF8_STRING

  56.     XFontSet font_set;

  57. #endif

  58.     Font font;

  59.     XFontStruct *font_struct;

  60.     int font_offset;

  61.     Cursor pointer;

  62.     Atom wm_protocols;

  63.     Atom wm_delete_window;

  64. #if defined HAVE_X11_XKBLIB_H

  65.     Bool autorepeat;

  66. #endif

  67.     uint32_t max_char;

  68.     int cursor_flags;

  69.     int dirty_cursor_x, dirty_cursor_y;

  70. #if defined X_HAVE_UTF8_STRING

  71.     XIM im;

  72.     XIC ic;

  73. #endif

  74. };

  75. 

  76. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  77. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  78. 

  79. static int x11_init_graphics(caca_display_t *dp)

  80. {

  81.     Colormap colormap;

  82.     XSetWindowAttributes x11_winattr;

  83. #if defined X_HAVE_UTF8_STRING

  84.     XVaNestedList list;

  85. #endif

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

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

  88.     char const *geometry;

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

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

  91.     int i;

  92. 

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

  94. 

  95. #if defined HAVE_GETENV

  96.     geometry = getenv("CACA_GEOMETRY");

  97.     if(geometry && *geometry)

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

  99. #endif

  100. 

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

  102.     dp->resize.allow = 1;

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

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

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

  106.     dp->resize.allow = 0;

  107. 

  108. #if defined HAVE_LOCALE_H

  109.     setlocale(LC_ALL, "");

  110. #endif

  111. 

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

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

  114.         return -1;

  115. 

  116. #if defined HAVE_GETENV

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

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

  119.         parser = fonts;

  120.     else

  121. #endif

  122.         parser = fonts + 1;

  123. 

  124.     /* Ignore font errors */

  125.     old_error_handler = XSetErrorHandler(x11_error_handler);

  126. 

  127.     /* Parse our font list */

  128.     for( ; ; parser++)

  129.     {

  130. #if defined X_HAVE_UTF8_STRING

  131.         char **missing_charset_list;

  132.         char *def_string;

  133.         int missing_charset_count;

  134. #endif

  135.         uint32_t font_max_char;

  136. 

  137.         if(!*parser)

  138.         {

  139.             XSetErrorHandler(old_error_handler);

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

  141.             return -1;

  142.         }

  143. 

  144. #if defined X_HAVE_UTF8_STRING

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

  146.                                              &missing_charset_list,

  147.                                              &missing_charset_count,

  148.                                              &def_string);

  149.         if (missing_charset_list)

  150.             XFreeStringList(missing_charset_list);

  151. 

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

  153.         {

  154.             char buf[BUFSIZ];

  155. 

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

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

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

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

  160.                                                  &missing_charset_list,

  161.                                                  &missing_charset_count,

  162.                                                  &def_string);

  163.             if (missing_charset_list)

  164.                 XFreeStringList(missing_charset_list);

  165.         }

  166. 

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

  168.             break;

  169. #endif

  170. 

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

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

  173.             continue;

  174. 

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

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

  177.         {

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

  179.             continue;

  180.         }

  181. 

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

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

  184.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  188.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  190.         else

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

  192. 

  193.         font_max_char =

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

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

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

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

  198. 

  199.         break;

  200.     }

  201. 

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

  203.     XSetErrorHandler(old_error_handler);

  204. 

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

  206. #if defined X_HAVE_UTF8_STRING

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

  208.     {

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

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

  211.         static wchar_t const test[] =

  212.         {

  213.             '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',

  214.             0x00cd, 0x00e7, 0x00d5, 0x0114, 0x0177, /* Í ç Õ Ĕ ŷ */

  215.             /* 0x0643, */ /* ﻙ */

  216.             0x304c, 0x672c, /* が本 */

  217.             0,

  218.         };

  219. 

  220.         XRectangle ink, logical;

  221. 

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

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

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

  225.                        &ink, &logical);

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

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

  228.     }

  229.     else

  230. #endif

  231.     {

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

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

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

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

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

  237.         {

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

  239.             {

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

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

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

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

  244.             }

  245.         }

  246. 

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

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

  249. 

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

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

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

  253.     }

  254. 

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

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

  257.     {

  258.         XColor color;

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

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

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

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

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

  264.     }

  265. 

  266.     x11_winattr.backing_store = Always;

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

  268.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  269. 

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

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

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

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

  274.                       0, 0, InputOutput, 0,

  275.                       CWBackingStore | CWBackPixel | CWEventMask,

  276.                       &x11_winattr);

  277. 

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

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

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

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

  282. 

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

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

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

  286. 

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

  288. 

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

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

  291. 

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

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

  294. #if defined X_HAVE_UTF8_STRING

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

  296. #endif

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

  298. 

  299.     for(;;)

  300.     {

  301.         XEvent xevent;

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

  303.         if(xevent.type == MapNotify)

  304.             break;

  305.     }

  306. 

  307. #if defined HAVE_X11_XKBLIB_H

  308.     /* Disable autorepeat */

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

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

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

  312. #endif

  313. 

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

  315.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  316.           | ExposureMask;

  317. 

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

  319. 

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

  321. 

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

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

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

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

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

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

  328. 

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

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

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

  332. 

  333. #if defined X_HAVE_UTF8_STRING

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

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

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

  337.                           XNInputStyle, XIMPreeditNothing | XIMStatusNothing,

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

  339.                           XNPreeditAttributes, list,

  340.                           XNStatusAttributes, list,

  341.                           NULL);

  342. #endif

  343. 

  344.     return 0;

  345. }

  346. 

  347. static int x11_end_graphics(caca_display_t *dp)

  348. {

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

  350. #if defined HAVE_X11_XKBLIB_H

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

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

  353. #endif

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

  355. #if defined X_HAVE_UTF8_STRING

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

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

  358.     else

  359. #endif

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

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

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

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

  364. #if defined X_HAVE_UTF8_STRING

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

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

  367. #endif

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

  369. 

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

  371. 

  372.     return 0;

  373. }

  374. 

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

  376. {

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

  378.     return 0;

  379. }

  380. 

  381. static int x11_get_display_width(caca_display_t const *dp)

  382. {

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

  384. }

  385. 

  386. static int x11_get_display_height(caca_display_t const *dp)

  387. {

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

  389. }

  390. 

  391. static void x11_display(caca_display_t *dp)

  392. {

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

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

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

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

  397.     int x, y, i, len;

  398. 

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

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

  401.     {

  402.         int dx, dy, dw, dh;

  403. 

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

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

  406.         if(i == -1)

  407.         {

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

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

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

  411.                 continue;

  412. 

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

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

  415.             dw = dh = 1;

  416. 

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

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

  419.         }

  420.         else

  421.         {

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

  423.         }

  424. 

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

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

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

  428.         {

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

  430.             {

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

  432.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  433. 

  434.                 len = 1;

  435.                 while(x + len < dx + dw

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

  437.                     len++;

  438. 

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

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

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

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

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

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

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

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

  447.             }

  448.         }

  449. 

  450.         /* Then print the foreground characters */

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

  452.         {

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

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

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

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

  457. 

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

  459.             {

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

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

  462. 

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

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

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

  466.                               *attrs, *chars);

  467.             }

  468.         }

  469.     }

  470. 

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

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

  473.     {

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

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

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

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

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

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

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

  481. 

  482.         /* Mark the area as dirty */

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

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

  485.     }

  486. 

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

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

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

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

  491.               0, 0);

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

  493. }

  494. 

  495. static void x11_handle_resize(caca_display_t *dp)

  496. {

  497.     Pixmap new_pixmap;

  498. 

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

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

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

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

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

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

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

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

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

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

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

  510. }

  511. 

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

  513. {

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

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

  516.     XEvent xevent;

  517.     char key;

  518. 

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

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

  521.     {

  522.         KeySym keysym;

  523. #if defined X_HAVE_UTF8_STRING

  524.         int len;

  525. #endif

  526. 

  527.         /* Expose event */

  528.         if(xevent.type == Expose)

  529.         {

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

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

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

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

  534.             continue;

  535.         }

  536. 

  537.         /* Resize event */

  538.         if(xevent.type == ConfigureNotify)

  539.         {

  540.             int w, h;

  541. 

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

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

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

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

  546. 

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

  548.                 continue;

  549. 

  550.             dp->resize.w = w;

  551.             dp->resize.h = h;

  552.             dp->resize.resized = 1;

  553. 

  554.             continue;

  555.         }

  556. 

  557.         /* Check for mouse motion events */

  558.         if(xevent.type == MotionNotify)

  559.         {

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

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

  562. 

  563.             if(newx >= width)

  564.                 newx = width - 1;

  565.             if(newy >= height)

  566.                 newy = height - 1;

  567. 

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

  569.                 continue;

  570. 

  571.             dp->mouse.x = newx;

  572.             dp->mouse.y = newy;

  573. 

  574.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  577.             return 1;

  578.         }

  579. 

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

  581.         if(xevent.type == ButtonPress)

  582.         {

  583.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  585.             return 1;

  586.         }

  587. 

  588.         if(xevent.type == ButtonRelease)

  589.         {

  590.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  592.             return 1;

  593.         }

  594. 

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

  596.         if(xevent.type == KeyPress)

  597.             ev->type = CACA_EVENT_KEY_PRESS;

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

  599.             ev->type = CACA_EVENT_KEY_RELEASE;

  600.         else

  601.             continue;

  602. 

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

  604.             continue;

  605. 

  606. #if defined X_HAVE_UTF8_STRING

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

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

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

  610.         if (len)

  611.         {

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

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

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

  615.             else

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

  617.             return 1;

  618.         }

  619. #endif

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

  621.         {

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

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

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

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

  626.             return 1;

  627.         }

  628. 

  629.         keysym = XLookupKeysym(&xevent.xkey, 0);

  630.         switch(keysym)

  631.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  651.             case XK_KP_Page_Up:

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

  653.             case XK_KP_Page_Down:

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

  655.             case XK_KP_Home:

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

  657.             case XK_KP_End:

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

  659. 

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

  661.         }

  662. 

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

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

  665.         return 1;

  666.     }

  667. 

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

  669.     {

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

  671.             continue;

  672. 

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

  674.         {

  675.             ev->type = CACA_EVENT_QUIT;

  676.             return 1;

  677.         }

  678.     }

  679. 

  680.     ev->type = CACA_EVENT_NONE;

  681.     return 0;

  682. }

  683. 

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

  685. {

  686.     Cursor no_ptr;

  687.     Pixmap bm_no;

  688.     XColor black, dummy;

  689.     Colormap colormap;

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

  691. 

  692.     if(flags)

  693.     {

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

  695.         return;

  696.     }

  697. 

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

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

  700.     {

  701.         return;

  702.     }

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

  704.                                   empty, 8, 8);

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

  706.                                  &black, &black, 0, 0);

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

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

  709.     if(bm_no != None)

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

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

  712. 

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

  714. }

  715. 

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

  717. {

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

  719. }

  720. 

  721. /*

  722.  * XXX: following functions are local

  723.  */

  724. 

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

  726. {

  727.     /* Ignore the error */

  728.     return 0;

  729. }

  730. 

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

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

  733. {

  734.     static uint8_t const udlr[] =

  735.     {

  736.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  737.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  738.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  739.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  740.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  741.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  742.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  743.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  744.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  745.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  746.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  747.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  748.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  749.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

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

  751.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  752.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  753.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  754.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  755.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  756.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  757.     };

  758. 

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

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

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

  762.     int fw;

  763. 

  764.     /* Underline */

  765.     if(attr & CACA_UNDERLINE)

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

  767. 

  768.     /* Skip spaces and magic stuff */

  769.     if(ch <= 0x00000020)

  770.         return;

  771. 

  772.     if(ch == CACA_MAGIC_FULLWIDTH)

  773.         return;

  774. 

  775.     fw = w;

  776.     if(caca_utf32_is_fullwidth(ch))

  777.         fw *= 2;

  778. 

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

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

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

  782. 

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

  784.     {

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

  786. 

  787.         if(D & 0x04)

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

  789. 

  790.         if(D & 0x01)

  791.             XFillRectangle(dpy, px, gc,

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

  793. 

  794.         if(D & 0x40)

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

  796. 

  797.         if(D & 0x10)

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

  799. 

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

  801. 

  802.         if(D & 0x08)

  803.         {

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

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

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

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

  808.         }

  809. 

  810.         if(D & 0x02)

  811.         {

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

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

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

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

  816.         }

  817. 

  818.         if(D & 0x80)

  819.         {

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

  821.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  823.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  824.         }

  825. 

  826.         if(D & 0x20)

  827.         {

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

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

  830.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  833.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  834.         }

  835. 

  836.         return;

  837.     }

  838. 

  839.     switch(ch)

  840.     {

  841.         case 0x000000b7: /* · */

  842.         case 0x00002219: /* ∙ */

  843.         case 0x000030fb: /* ・ */

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

  845.             return;

  846. 

  847.         case 0x00002261: /* ≡ */

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

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

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

  851.             return;

  852. 

  853.         case 0x00002580: /* ▀ */

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

  855.             return;

  856. 

  857.         case 0x00002584: /* ▄ */

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

  859.             return;

  860. 

  861.         case 0x00002588: /* █ */

  862.         case 0x000025ae: /* ▮ */

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

  864.             return;

  865. 

  866.         case 0x0000258c: /* ▌ */

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

  868.             return;

  869. 

  870.         case 0x00002590: /* ▐ */

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

  872.             return;

  873. 

  874.         case 0x000025a0: /* ■ */

  875.         case 0x000025ac: /* ▬ */

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

  877.             return;

  878. 

  879.         case 0x00002593: /* ▓ */

  880.         case 0x00002592: /* ▒ */

  881.         case 0x00002591: /* ░ */

  882.         {

  883.             /* FIXME: this sucks utterly */

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

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

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

  887.             {

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

  889.                     continue;

  890. 

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

  892.             }

  893.             return;

  894.         }

  895. 

  896.         case 0x000025cb: /* ○ */

  897.         case 0x00002022: /* • */

  898.         case 0x000025cf: /* ● */

  899.         {

  900.             int d, xo, yo;

  901. 

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

  903.             if(h < fw)

  904.                 d = h;

  905.             if(d < 1)

  906.                 d = 1;

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

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

  909.             if(ch == 0x000025cb)

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

  911.             else

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

  913.             return;

  914.         }

  915.     }

  916. 

  917. #if defined X_HAVE_UTF8_STRING

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

  919.     {

  920.         wchar_t wch = ch;

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

  922.     }

  923.     else

  924. #endif

  925.     {

  926.         XChar2b ch16;

  927. 

  928. #if !defined X_HAVE_UTF8_STRING

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

  930.         {

  931.             ch16.byte1 = 0;

  932.             ch16.byte2 = caca_utf32_to_ascii(ch);

  933.         }

  934.         else

  935. #endif

  936.         {

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

  938.             ch16.byte2 = (uint8_t)ch;

  939.         }

  940. 

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

  942.     }

  943. }

  944. 

  945. /*

  946.  * Driver initialisation

  947.  */

  948. 

  949. int x11_install(caca_display_t *dp)

  950. {

  951. #if defined HAVE_GETENV

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

  953.         return -1;

  954. #endif

  955. 

  956.     dp->drv.id = CACA_DRIVER_X11;

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

  958. 

  959.     dp->drv.init_graphics = x11_init_graphics;

  960.     dp->drv.end_graphics = x11_end_graphics;

  961.     dp->drv.set_display_title = x11_set_display_title;

  962.     dp->drv.get_display_width = x11_get_display_width;

  963.     dp->drv.get_display_height = x11_get_display_height;

  964.     dp->drv.display = x11_display;

  965.     dp->drv.handle_resize = x11_handle_resize;

  966.     dp->drv.get_event = x11_get_event;

  967.     dp->drv.set_mouse = x11_set_mouse;

  968.     dp->drv.set_cursor = x11_set_cursor;

  969. 

  970.     return 0;

  971. }

  972. 

  973. #endif /* USE_X11 */