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libcaca/caca/driver/x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

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

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

  5.  *                All Rights Reserved

  6.  *

  7.  *  $Id$

  8.  *

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

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

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

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

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

  14.  */

  15. 

  16. /*

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

  18.  */

  19. 

  20. #include "config.h"

  21. 

  22. #if defined(USE_X11)

  23. 

  24. #include <X11/Xlib.h>

  25. #include <X11/Xutil.h>

  26. #include <X11/keysym.h>

  27. #if defined HAVE_X11_XKBLIB_H

  28. #   include <X11/XKBlib.h>

  29. #endif

  30. 

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

  32. #include <stdlib.h>

  33. #include <string.h>

  34. #if defined HAVE_LOCALE_H

  35. #   include <locale.h>

  36. #endif

  37. 

  38. #include "caca.h"

  39. #include "caca.h"

  40. #include "caca_internals.h"

  41. 

  42. /*

  43.  * Local functions

  44.  */

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

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

  47.                           uint32_t, uint32_t);

  48. 

  49. struct driver_private

  50. {

  51.     Display *dpy;

  52.     Window window;

  53.     Pixmap pixmap;

  54.     GC gc;

  55.     long int event_mask;

  56.     int font_width, font_height;

  57.     int colors[4096];

  58. #if defined X_HAVE_UTF8_STRING

  59.     XFontSet font_set;

  60. #endif

  61.     Font font;

  62.     XFontStruct *font_struct;

  63.     int font_offset;

  64.     Cursor pointer;

  65.     Atom wm_protocols;

  66.     Atom wm_delete_window;

  67. #if defined HAVE_X11_XKBLIB_H

  68.     Bool autorepeat;

  69. #endif

  70.     uint32_t max_char;

  71.     int cursor_flags;

  72.     int dirty_cursor_x, dirty_cursor_y;

  73. #if defined X_HAVE_UTF8_STRING

  74.     XIM im;

  75.     XIC ic;

  76. #endif

  77. };

  78. 

  79. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  80. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  81. 

  82. static int x11_init_graphics(caca_display_t *dp)

  83. {

  84.     Colormap colormap;

  85.     XSetWindowAttributes x11_winattr;

  86. #if defined X_HAVE_UTF8_STRING

  87.     XVaNestedList list;

  88. #endif

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

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

  91.     char const *geometry;

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

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

  94.     int i;

  95. 

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

  97. 

  98. #if defined HAVE_GETENV

  99.     geometry = getenv("CACA_GEOMETRY");

  100.     if(geometry && *geometry)

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

  102. #endif

  103. 

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

  105.     dp->resize.allow = 1;

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

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

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

  109.     dp->resize.allow = 0;

  110. 

  111. #if defined HAVE_LOCALE_H

  112.     setlocale(LC_ALL, "");

  113. #endif

  114. 

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

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

  117.         return -1;

  118. 

  119. #if defined HAVE_GETENV

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

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

  122.         parser = fonts;

  123.     else

  124. #endif

  125.         parser = fonts + 1;

  126. 

  127.     /* Ignore font errors */

  128.     old_error_handler = XSetErrorHandler(x11_error_handler);

  129. 

  130.     /* Parse our font list */

  131.     for( ; ; parser++)

  132.     {

  133. #if defined X_HAVE_UTF8_STRING

  134.         char **missing_charset_list;

  135.         char *def_string;

  136.         int missing_charset_count;

  137. #endif

  138.         uint32_t font_max_char;

  139. 

  140.         if(!*parser)

  141.         {

  142.             XSetErrorHandler(old_error_handler);

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

  144.             return -1;

  145.         }

  146. 

  147. #if defined X_HAVE_UTF8_STRING

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

  149.                                              &missing_charset_list,

  150.                                              &missing_charset_count,

  151.                                              &def_string);

  152.         if (missing_charset_list)

  153.             XFreeStringList(missing_charset_list);

  154. 

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

  156.         {

  157.             char buf[BUFSIZ];

  158. 

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

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

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

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

  163.                                                  &missing_charset_list,

  164.                                                  &missing_charset_count,

  165.                                                  &def_string);

  166.             if (missing_charset_list)

  167.                 XFreeStringList(missing_charset_list);

  168.         }

  169. 

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

  171.             break;

  172. #endif

  173. 

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

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

  176.             continue;

  177. 

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

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

  180.         {

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

  182.             continue;

  183.         }

  184. 

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

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

  187.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  191.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  193.         else

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

  195. 

  196.         font_max_char =

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

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

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

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

  201. 

  202.         break;

  203.     }

  204. 

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

  206.     XSetErrorHandler(old_error_handler);

  207. 

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

  209. #if defined X_HAVE_UTF8_STRING

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

  211.     {

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

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

  214.         static wchar_t const test[] =

  215.         {

  216.             '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',

  217.             0x00cd, 0x00e7, 0x00d5, 0x0114, 0x0177, /* Í ç Õ Ĕ ŷ */

  218.             /* 0x0643, */ /* ﻙ */

  219.             0x304c, 0x672c, /* が本 */

  220.             0,

  221.         };

  222. 

  223.         XRectangle ink, logical;

  224. 

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

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

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

  228.                        &ink, &logical);

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

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

  231.     }

  232.     else

  233. #endif

  234.     {

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

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

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

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

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

  240.         {

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

  242.             {

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

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

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

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

  247.             }

  248.         }

  249. 

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

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

  252. 

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

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

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

  256.     }

  257. 

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

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

  260.     {

  261.         XColor color;

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

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

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

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

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

  267.     }

  268. 

  269.     x11_winattr.backing_store = Always;

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

  271.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  272. 

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

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

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

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

  277.                       0, 0, InputOutput, 0,

  278.                       CWBackingStore | CWBackPixel | CWEventMask,

  279.                       &x11_winattr);

  280. 

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

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

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

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

  285. 

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

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

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

  289. 

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

  291. 

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

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

  294. 

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

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

  297. #if defined X_HAVE_UTF8_STRING

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

  299. #endif

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

  301. 

  302.     for(;;)

  303.     {

  304.         XEvent xevent;

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

  306.         if(xevent.type == MapNotify)

  307.             break;

  308.     }

  309. 

  310. #if defined HAVE_X11_XKBLIB_H

  311.     /* Disable autorepeat */

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

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

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

  315. #endif

  316. 

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

  318.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  319.           | ExposureMask;

  320. 

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

  322. 

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

  324. 

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

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

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

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

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

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

  331. 

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

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

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

  335. 

  336. #if defined X_HAVE_UTF8_STRING

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

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

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

  340.                           XNInputStyle, XIMPreeditNothing | XIMStatusNothing,

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

  342.                           XNPreeditAttributes, list,

  343.                           XNStatusAttributes, list,

  344.                           NULL);

  345. #endif

  346. 

  347.     return 0;

  348. }

  349. 

  350. static int x11_end_graphics(caca_display_t *dp)

  351. {

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

  353. #if defined HAVE_X11_XKBLIB_H

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

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

  356. #endif

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

  358. #if defined X_HAVE_UTF8_STRING

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

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

  361.     else

  362. #endif

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

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

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

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

  367. #if defined X_HAVE_UTF8_STRING

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

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

  370. #endif

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

  372. 

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

  374. 

  375.     return 0;

  376. }

  377. 

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

  379. {

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

  381.     return 0;

  382. }

  383. 

  384. static int x11_get_display_width(caca_display_t const *dp)

  385. {

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

  387. }

  388. 

  389. static int x11_get_display_height(caca_display_t const *dp)

  390. {

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

  392. }

  393. 

  394. static void x11_display(caca_display_t *dp)

  395. {

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

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

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

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

  400.     int x, y, i, len;

  401. 

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

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

  404.     {

  405.         int dx, dy, dw, dh;

  406. 

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

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

  409.         if(i == -1)

  410.         {

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

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

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

  414.                 continue;

  415. 

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

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

  418.             dw = dh = 1;

  419. 

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

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

  422.         }

  423.         else

  424.         {

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

  426.         }

  427. 

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

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

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

  431.         {

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

  433.             {

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

  435.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  436. 

  437.                 len = 1;

  438.                 while(x + len < dx + dw

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

  440.                     len++;

  441. 

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

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

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

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

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

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

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

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

  450.             }

  451.         }

  452. 

  453.         /* Then print the foreground characters */

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

  455.         {

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

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

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

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

  460. 

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

  462.             {

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

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

  465. 

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

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

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

  469.                               *attrs, *chars);

  470.             }

  471.         }

  472.     }

  473. 

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

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

  476.     {

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

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

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

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

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

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

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

  484. 

  485.         /* Mark the area as dirty */

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

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

  488.     }

  489. 

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

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

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

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

  494.               0, 0);

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

  496. }

  497. 

  498. static void x11_handle_resize(caca_display_t *dp)

  499. {

  500.     Pixmap new_pixmap;

  501. 

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

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

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

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

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

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

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

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

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

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

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

  513. }

  514. 

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

  516. {

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

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

  519.     XEvent xevent;

  520.     char key;

  521. 

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

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

  524.     {

  525.         KeySym keysym;

  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 defined X_HAVE_UTF8_STRING

  604.         if(Xutf8LookupString(dp->drv.p->ic, &xevent.xkey, ev->data.key.utf8, 8, NULL, NULL))

  605.         {

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

  607.             if(ev->data.key.utf32 <= 0x7f)

  608.             {

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

  610.             } else {

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

  612.             }

  613.             return 1;

  614.         }

  615. #endif

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

  617.         {

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

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

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

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

  622.             return 1;

  623.         }

  624. 

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

  626.         switch(keysym)

  627.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  647.             case XK_KP_Page_Up:

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

  649.             case XK_KP_Page_Down:

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

  651.             case XK_KP_Home:

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

  653.             case XK_KP_End:

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

  655. 

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

  657.         }

  658. 

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

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

  661.         return 1;

  662.     }

  663. 

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

  665.     {

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

  667.             continue;

  668. 

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

  670.         {

  671.             ev->type = CACA_EVENT_QUIT;

  672.             return 1;

  673.         }

  674.     }

  675. 

  676.     ev->type = CACA_EVENT_NONE;

  677.     return 0;

  678. }

  679. 

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

  681. {

  682.     Cursor no_ptr;

  683.     Pixmap bm_no;

  684.     XColor black, dummy;

  685.     Colormap colormap;

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

  687. 

  688.     if(flags)

  689.     {

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

  691.         return;

  692.     }

  693. 

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

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

  696.     {

  697.         return;

  698.     }

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

  700.                                   empty, 8, 8);

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

  702.                                  &black, &black, 0, 0);

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

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

  705.     if(bm_no != None)

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

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

  708. 

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

  710. }

  711. 

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

  713. {

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

  715. }

  716. 

  717. /*

  718.  * XXX: following functions are local

  719.  */

  720. 

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

  722. {

  723.     /* Ignore the error */

  724.     return 0;

  725. }

  726. 

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

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

  729. {

  730.     static uint8_t const udlr[] =

  731.     {

  732.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  733.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  734.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  735.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  736.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  737.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  738.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  739.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  740.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  741.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  742.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  743.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  744.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

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

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

  747.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  748.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  749.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  750.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  751.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  752.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  753.     };

  754. 

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

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

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

  758.     int fw;

  759. 

  760.     /* Underline */

  761.     if(attr & CACA_UNDERLINE)

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

  763. 

  764.     /* Skip spaces and magic stuff */

  765.     if(ch <= 0x00000020)

  766.         return;

  767. 

  768.     if(ch == CACA_MAGIC_FULLWIDTH)

  769.         return;

  770. 

  771.     fw = w;

  772.     if(caca_utf32_is_fullwidth(ch))

  773.         fw *= 2;

  774. 

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

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

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

  778. 

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

  780.     {

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

  782. 

  783.         if(D & 0x04)

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

  785. 

  786.         if(D & 0x01)

  787.             XFillRectangle(dpy, px, gc,

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

  789. 

  790.         if(D & 0x40)

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

  792. 

  793.         if(D & 0x10)

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

  795. 

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

  797. 

  798.         if(D & 0x08)

  799.         {

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

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

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

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

  804.         }

  805. 

  806.         if(D & 0x02)

  807.         {

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

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

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

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

  812.         }

  813. 

  814.         if(D & 0x80)

  815.         {

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

  817.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  819.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  820.         }

  821. 

  822.         if(D & 0x20)

  823.         {

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

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

  826.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  829.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  830.         }

  831. 

  832.         return;

  833.     }

  834. 

  835.     switch(ch)

  836.     {

  837.         case 0x000000b7: /* · */

  838.         case 0x00002219: /* ∙ */

  839.         case 0x000030fb: /* ・ */

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

  841.             return;

  842. 

  843.         case 0x00002261: /* ≡ */

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

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

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

  847.             return;

  848. 

  849.         case 0x00002580: /* ▀ */

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

  851.             return;

  852. 

  853.         case 0x00002584: /* ▄ */

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

  855.             return;

  856. 

  857.         case 0x00002588: /* █ */

  858.         case 0x000025ae: /* ▮ */

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

  860.             return;

  861. 

  862.         case 0x0000258c: /* ▌ */

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

  864.             return;

  865. 

  866.         case 0x00002590: /* ▐ */

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

  868.             return;

  869. 

  870.         case 0x000025a0: /* ■ */

  871.         case 0x000025ac: /* ▬ */

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

  873.             return;

  874. 

  875.         case 0x00002593: /* ▓ */

  876.         case 0x00002592: /* ▒ */

  877.         case 0x00002591: /* ░ */

  878.         {

  879.             /* FIXME: this sucks utterly */

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

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

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

  883.             {

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

  885.                     continue;

  886. 

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

  888.             }

  889.             return;

  890.         }

  891. 

  892.         case 0x000025cb: /* ○ */

  893.         case 0x00002022: /* • */

  894.         case 0x000025cf: /* ● */

  895.         {

  896.             int d, xo, yo;

  897. 

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

  899.             if(h < fw)

  900.                 d = h;

  901.             if(d < 1)

  902.                 d = 1;

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

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

  905.             if(ch == 0x000025cb)

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

  907.             else

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

  909.             return;

  910.         }

  911.     }

  912. 

  913. #if defined X_HAVE_UTF8_STRING

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

  915.     {

  916.         wchar_t wch = ch;

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

  918.     }

  919.     else

  920. #endif

  921.     {

  922.         XChar2b ch16;

  923. 

  924. #if !defined X_HAVE_UTF8_STRING

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

  926.         {

  927.             ch16.byte1 = 0;

  928.             ch16.byte2 = caca_utf32_to_ascii(ch);

  929.         }

  930.         else

  931. #endif

  932.         {

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

  934.             ch16.byte2 = (uint8_t)ch;

  935.         }

  936. 

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

  938.     }

  939. }

  940. 

  941. /*

  942.  * Driver initialisation

  943.  */

  944. 

  945. int x11_install(caca_display_t *dp)

  946. {

  947. #if defined HAVE_GETENV

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

  949.         return -1;

  950. #endif

  951. 

  952.     dp->drv.id = CACA_DRIVER_X11;

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

  954. 

  955.     dp->drv.init_graphics = x11_init_graphics;

  956.     dp->drv.end_graphics = x11_end_graphics;

  957.     dp->drv.set_display_title = x11_set_display_title;

  958.     dp->drv.get_display_width = x11_get_display_width;

  959.     dp->drv.get_display_height = x11_get_display_height;

  960.     dp->drv.display = x11_display;

  961.     dp->drv.handle_resize = x11_handle_resize;

  962.     dp->drv.get_event = x11_get_event;

  963.     dp->drv.set_mouse = x11_set_mouse;

  964.     dp->drv.set_cursor = x11_set_cursor;

  965. 

  966.     return 0;

  967. }

  968. 

  969. #endif /* USE_X11 */