cacalabs
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libcaca
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libcaca/caca/driver_x11.c

800 rindas
25 KiB
Neapstrādāts Vainot Vēsture 

  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2007 Sam Hocevar <sam@zoy.org>

  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. #include "common.h"

  22. 

  23. #if defined(USE_X11)

  24. 

  25. #include <X11/Xlib.h>

  26. #include <X11/Xutil.h>

  27. #include <X11/keysym.h>

  28. #if defined(HAVE_X11_XKBLIB_H)

  29. #   include <X11/XKBlib.h>

  30. #endif

  31. 

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

  33. #include <stdlib.h>

  34. #include <string.h>

  35. 

  36. #include "caca.h"

  37. #include "caca_internals.h"

  38. #include "cucul.h"

  39. #include "cucul_internals.h"

  40. 

  41. /*

  42.  * Local functions

  43.  */

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

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

  46.                           uint32_t, uint32_t);

  47. 

  48. struct driver_private

  49. {

  50.     Display *dpy;

  51.     Window window;

  52.     Pixmap pixmap;

  53.     GC gc;

  54.     long int event_mask;

  55.     int font_width, font_height;

  56.     int colors[4096];

  57.     Font font;

  58.     XFontStruct *font_struct;

  59.     int font_offset;

  60.     Cursor pointer;

  61.     Atom wm_protocols;

  62.     Atom wm_delete_window;

  63. #if defined(HAVE_X11_XKBLIB_H)

  64.     Bool autorepeat;

  65. #endif

  66.     uint32_t max_char;

  67.     int cursor_flags;

  68. };

  69. 

  70. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  71. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  72. 

  73. static int x11_init_graphics(caca_display_t *dp)

  74. {

  75.     Colormap colormap;

  76.     XSetWindowAttributes x11_winattr;

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

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

  79.     char const *geometry;

  80.     unsigned int width = dp->cv->width, height = dp->cv->height;

  81.     int i;

  82. 

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

  84. 

  85. #if defined(HAVE_GETENV)

  86.     geometry = getenv("CACA_GEOMETRY");

  87.     if(geometry && *geometry)

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

  89. #endif

  90. 

  91.     __cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);

  92. 

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

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

  95.         return -1;

  96. 

  97. #if defined(HAVE_GETENV)

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

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

  100.         parser = fonts;

  101.     else

  102. #endif

  103.         parser = fonts + 1;

  104. 

  105.     /* Ignore font errors */

  106.     old_error_handler = XSetErrorHandler(x11_error_handler);

  107. 

  108.     /* Parse our font list */

  109.     for( ; ; parser++)

  110.     {

  111.         unsigned int font_max_char;

  112. 

  113.         if(!*parser)

  114.         {

  115.             XSetErrorHandler(old_error_handler);

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

  117.             return -1;

  118.         }

  119. 

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

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

  122.             continue;

  123. 

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

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

  126.         {

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

  128.             continue;

  129.         }

  130. 

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

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

  133.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  137.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  139.         else

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

  141. 

  142.         font_max_char = 

  143.             (((unsigned int)dp->drv.p->font_struct->max_byte1) << 8)

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

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

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

  147. 

  148.         break;

  149.     }

  150. 

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

  152.     XSetErrorHandler(old_error_handler);

  153.     

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

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

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

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

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

  159.     {

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

  161.         {

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

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

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

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

  166.         }

  167.     }

  168. 

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

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

  171. 

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

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

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

  175. 

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

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

  178.     {

  179.         XColor color;

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

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

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

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

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

  185.     }

  186. 

  187.     x11_winattr.backing_store = Always;

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

  189.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  190. 

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

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

  193.                       dp->cv->width * dp->drv.p->font_width,

  194.                       dp->cv->height * dp->drv.p->font_height,

  195.                       0, 0, InputOutput, 0,

  196.                       CWBackingStore | CWBackPixel | CWEventMask,

  197.                       &x11_winattr);

  198. 

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

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

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

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

  203. 

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

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

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

  207. 

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

  209. 

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

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

  212. 

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

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

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

  216. 

  217.     for(;;)

  218.     {

  219.         XEvent xevent;

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

  221.         if(xevent.type == MapNotify)

  222.             break;

  223.     }

  224. 

  225. #if defined(HAVE_X11_XKBLIB_H)

  226.     /* Disable autorepeat */

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

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

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

  230. #endif

  231. 

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

  233.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  234.           | ExposureMask;

  235. 

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

  237. 

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

  239. 

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

  241.                                    dp->cv->width * dp->drv.p->font_width,

  242.                                    dp->cv->height * dp->drv.p->font_height,

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

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

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

  246. 

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

  248. 

  249.     return 0;

  250. }

  251. 

  252. static int x11_end_graphics(caca_display_t *dp)

  253. {

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

  255. #if defined(HAVE_X11_XKBLIB_H)

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

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

  258. #endif

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

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

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

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

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

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

  265. 

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

  267. 

  268.     return 0;

  269. }

  270. 

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

  272. {

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

  274.     return 0;

  275. }

  276. 

  277. static unsigned int x11_get_display_width(caca_display_t const *dp)

  278. {

  279.     return dp->cv->width * dp->drv.p->font_width;

  280. }

  281. 

  282. static unsigned int x11_get_display_height(caca_display_t const *dp)

  283. {

  284.     return dp->cv->height * dp->drv.p->font_height;

  285. }

  286. 

  287. static void x11_display(caca_display_t *dp)

  288. {

  289.     unsigned int x, y, len;

  290. 

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

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

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

  294.     {

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

  296.         {

  297.             uint32_t *attrs = dp->cv->attrs + x + y * dp->cv->width;

  298.             uint16_t bg = _cucul_attr_to_rgb12bg(*attrs);

  299. 

  300.             len = 1;

  301.             while(x + len < dp->cv->width

  302.                    && _cucul_attr_to_rgb12bg(attrs[len]) == bg)

  303.                 len++;

  304. 

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

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

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

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

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

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

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

  312.         }

  313.     }

  314. 

  315.     /* Then print the foreground characters */

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

  317.     {

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

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

  320.         uint32_t *chars = dp->cv->chars + y * dp->cv->width;

  321.         uint32_t *attrs = dp->cv->attrs + y * dp->cv->width;

  322. 

  323.         for(x = 0; x < dp->cv->width; x++, chars++, attrs++)

  324.         {

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

  326.                            dp->drv.p->colors[_cucul_attr_to_rgb12fg(*attrs)]);

  327. 

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

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

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

  331.                           *attrs, *chars);

  332.         }

  333.     }

  334. 

  335.     /* Print the cursor if necessary */

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

  337.     {

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

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

  340.         x = cucul_get_cursor_x(dp->cv);

  341.         y = cucul_get_cursor_y(dp->cv);

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

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

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

  345.     }

  346. 

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

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

  349.               dp->cv->width * dp->drv.p->font_width,

  350.               dp->cv->height * dp->drv.p->font_height,

  351.               0, 0);

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

  353. }

  354. 

  355. static void x11_handle_resize(caca_display_t *dp)

  356. {

  357.     Pixmap new_pixmap;

  358. 

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

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

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

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

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

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

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

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

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

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

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

  370. }

  371. 

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

  373. {

  374.     XEvent xevent;

  375.     char key;

  376. 

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

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

  379.     {

  380.         KeySym keysym;

  381. 

  382.         /* Expose event */

  383.         if(xevent.type == Expose)

  384.         {

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

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

  387.                       dp->cv->width * dp->drv.p->font_width,

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

  389.             continue;

  390.         }

  391. 

  392.         /* Resize event */

  393.         if(xevent.type == ConfigureNotify)

  394.         {

  395.             unsigned int w, h;

  396. 

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

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

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

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

  401. 

  402.             if(!w || !h || (w == dp->cv->width && h == dp->cv->height))

  403.                 continue;

  404. 

  405.             dp->resize.w = w;

  406.             dp->resize.h = h;

  407.             dp->resize.resized = 1;

  408. 

  409.             continue;

  410.         }

  411. 

  412.         /* Check for mouse motion events */

  413.         if(xevent.type == MotionNotify)

  414.         {

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

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

  417. 

  418.             if(newx >= dp->cv->width)

  419.                 newx = dp->cv->width - 1;

  420.             if(newy >= dp->cv->height)

  421.                 newy = dp->cv->height - 1;

  422. 

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

  424.                 continue;

  425. 

  426.             dp->mouse.x = newx;

  427.             dp->mouse.y = newy;

  428. 

  429.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  432.             return 1;

  433.         }

  434. 

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

  436.         if(xevent.type == ButtonPress)

  437.         {

  438.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  440.             return 1;

  441.         }

  442. 

  443.         if(xevent.type == ButtonRelease)

  444.         {

  445.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  447.             return 1;

  448.         }

  449. 

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

  451.         if(xevent.type == KeyPress)

  452.             ev->type = CACA_EVENT_KEY_PRESS;

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

  454.             ev->type = CACA_EVENT_KEY_RELEASE;

  455.         else

  456.             continue;

  457. 

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

  459.         {

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

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

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

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

  464.             return 1;

  465.         }

  466. 

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

  468.         switch(keysym)

  469.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  489.             case XK_KP_Page_Up:

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

  491.             case XK_KP_Page_Down:

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

  493.             case XK_KP_Home:

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

  495.             case XK_KP_End:

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

  497. 

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

  499.         }

  500. 

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

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

  503.         return 1;

  504.     }

  505. 

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

  507.     {

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

  509.             continue;

  510. 

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

  512.         {

  513.             ev->type = CACA_EVENT_QUIT;

  514.             return 1;

  515.         }

  516.     }

  517. 

  518.     ev->type = CACA_EVENT_NONE;

  519.     return 0;

  520. }

  521. 

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

  523. {

  524.     Cursor no_ptr;

  525.     Pixmap bm_no;

  526.     XColor black, dummy;

  527.     Colormap colormap;

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

  529. 

  530.     if(flags)

  531.     {

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

  533.         return;

  534.     }

  535. 

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

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

  538.     {

  539.         return;

  540.     }

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

  542.                                   empty, 8, 8);

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

  544.                                  &black, &black, 0, 0);

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

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

  547.     if(bm_no != None)

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

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

  550. 

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

  552. }

  553. 

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

  555. {

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

  557. }

  558. 

  559. /*

  560.  * XXX: following functions are local

  561.  */

  562. 

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

  564. {

  565.     /* Ignore the error */

  566.     return 0;

  567. }

  568. 

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

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

  571. {

  572.     static uint8_t const udlr[] =

  573.     {

  574.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  575.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  576.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  577.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  578.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  579.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  580.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  581.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  582.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  583.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  584.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  585.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  586.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  587.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  588.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  589.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  590.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  591.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  592.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  593.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  594.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  595.     };

  596. 

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

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

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

  600.     int fw;

  601.     XChar2b ch16;

  602. 

  603.     /* Underline */

  604.     if(attr & CUCUL_UNDERLINE)

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

  606. 

  607.     /* Skip spaces and magic stuff */

  608.     if(ch <= 0x00000020)

  609.         return;

  610. 

  611.     if(ch == CUCUL_MAGIC_FULLWIDTH)

  612.         return;

  613. 

  614.     fw = w;

  615.     if(cucul_utf32_is_fullwidth(ch))

  616.         fw *= 2;

  617. 

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

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

  620.      * characters, print what cucul_utf32_to_ascii() returns. */

  621. 

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

  623.     {

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

  625. 

  626.         if(D & 0x04)

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

  628. 

  629.         if(D & 0x01)

  630.             XFillRectangle(dpy, px, gc,

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

  632. 

  633.         if(D & 0x40)

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

  635. 

  636.         if(D & 0x10)

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

  638. 

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

  640. 

  641.         if(D & 0x08)

  642.         {

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

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

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

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

  647.         }

  648. 

  649.         if(D & 0x02)

  650.         {

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

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

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

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

  655.         }

  656. 

  657.         if(D & 0x80)

  658.         {

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

  660.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  662.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  663.         }

  664. 

  665.         if(D & 0x20)

  666.         {

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

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

  669.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  672.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  673.         }

  674. 

  675.         return;

  676.     }

  677. 

  678.     switch(ch)

  679.     {

  680.         case 0x000000b7: /* · */

  681.         case 0x00002219: /* ∙ */

  682.         case 0x000030fb: /* ・ */

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

  684.             return;

  685. 

  686.         case 0x00002261: /* ≡ */

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

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

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

  690.             return;

  691. 

  692.         case 0x00002580: /* ▀ */

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

  694.             return;

  695. 

  696.         case 0x00002584: /* ▄ */

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

  698.             return;

  699. 

  700.         case 0x00002588: /* █ */

  701.         case 0x000025ae: /* ▮ */

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

  703.             return;

  704. 

  705.         case 0x0000258c: /* ▌ */

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

  707.             return;

  708. 

  709.         case 0x00002590: /* ▐ */

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

  711.             return;

  712. 

  713.         case 0x000025a0: /* ■ */

  714.         case 0x000025ac: /* ▬ */

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

  716.             return;

  717. 

  718.         case 0x00002593: /* ▓ */

  719.         case 0x00002592: /* ▒ */

  720.         case 0x00002591: /* ░ */

  721.         {

  722.             /* FIXME: this sucks utterly */

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

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

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

  726.             {

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

  728.                     continue;

  729. 

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

  731.             }

  732.             return;

  733.         }

  734. 

  735.         case 0x000025cb: /* ○ */

  736.         case 0x00002022: /* • */

  737.         case 0x000025cf: /* ● */

  738.         {

  739.             int d, xo, yo;

  740. 

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

  742.             if(h < fw)

  743.                 d = h;

  744.             if(d < 1)

  745.                 d = 1;

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

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

  748.             if(ch == 0x000025cb)

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

  750.             else

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

  752.             return;

  753.         }

  754.     }

  755. 

  756.     if(ch >= 0x00000020 && ch <= dp->drv.p->max_char)

  757.     {

  758.         /* ascii, latin-1 or unicode font (might draw a blank square) */

  759.         ch16.byte1 = (ch) >> 8;

  760.         ch16.byte2 = (ch) & 0xff;

  761.     }

  762.     else

  763.     {

  764.         ch16.byte1 = 0;

  765.         ch16.byte2 = cucul_utf32_to_ascii(ch);

  766.     }

  767. 

  768.     XDrawString16(dpy, px, gc, x + (ch16.byte1 ? 0 : (fw - w) / 2), yoff, &ch16, 1);

  769. }

  770. 

  771. /*

  772.  * Driver initialisation

  773.  */

  774. 

  775. int x11_install(caca_display_t *dp)

  776. {

  777. #if defined(HAVE_GETENV)

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

  779.         return -1;

  780. #endif

  781. 

  782.     dp->drv.driver = CACA_DRIVER_X11;

  783. 

  784.     dp->drv.init_graphics = x11_init_graphics;

  785.     dp->drv.end_graphics = x11_end_graphics;

  786.     dp->drv.set_display_title = x11_set_display_title;

  787.     dp->drv.get_display_width = x11_get_display_width;

  788.     dp->drv.get_display_height = x11_get_display_height;

  789.     dp->drv.display = x11_display;

  790.     dp->drv.handle_resize = x11_handle_resize;

  791.     dp->drv.get_event = x11_get_event;

  792.     dp->drv.set_mouse = x11_set_mouse;

  793.     dp->drv.set_cursor = x11_set_cursor;

  794. 

  795.     return 0;

  796. }

  797. 

  798. #endif /* USE_X11 */