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libcaca/caca/driver_x11.c

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  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 "cucul.h"

  37. #include "caca.h"

  38. #include "caca_internals.h"

  39. 

  40. /*

  41.  * Local functions

  42.  */

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

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

  45.                           uint32_t, uint32_t);

  46. 

  47. struct driver_private

  48. {

  49.     Display *dpy;

  50.     Window window;

  51.     Pixmap pixmap;

  52.     GC gc;

  53.     long int event_mask;

  54.     int font_width, font_height;

  55.     int colors[4096];

  56.     Font font;

  57.     XFontStruct *font_struct;

  58.     int font_offset;

  59.     Cursor pointer;

  60.     Atom wm_protocols;

  61.     Atom wm_delete_window;

  62. #if defined(HAVE_X11_XKBLIB_H)

  63.     Bool autorepeat;

  64. #endif

  65.     uint32_t max_char;

  66.     int cursor_flags;

  67. };

  68. 

  69. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  70. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  71. 

  72. static int x11_init_graphics(caca_display_t *dp)

  73. {

  74.     Colormap colormap;

  75.     XSetWindowAttributes x11_winattr;

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

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

  78.     char const *geometry;

  79.     unsigned int width = cucul_get_canvas_width(dp->cv);

  80.     unsigned int height = cucul_get_canvas_height(dp->cv);

  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.     dp->resize.allow = 1;

  92.     cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);

  93.     width = cucul_get_canvas_width(dp->cv);

  94.     height = cucul_get_canvas_height(dp->cv);

  95.     dp->resize.allow = 0;

  96. 

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

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

  99.         return -1;

  100. 

  101. #if defined(HAVE_GETENV)

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

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

  104.         parser = fonts;

  105.     else

  106. #endif

  107.         parser = fonts + 1;

  108. 

  109.     /* Ignore font errors */

  110.     old_error_handler = XSetErrorHandler(x11_error_handler);

  111. 

  112.     /* Parse our font list */

  113.     for( ; ; parser++)

  114.     {

  115.         unsigned int font_max_char;

  116. 

  117.         if(!*parser)

  118.         {

  119.             XSetErrorHandler(old_error_handler);

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

  121.             return -1;

  122.         }

  123. 

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

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

  126.             continue;

  127. 

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

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

  130.         {

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

  132.             continue;

  133.         }

  134. 

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

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

  137.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  141.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  143.         else

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

  145. 

  146.         font_max_char = 

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

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

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

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

  151. 

  152.         break;

  153.     }

  154. 

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

  156.     XSetErrorHandler(old_error_handler);

  157.     

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

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

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

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

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

  163.     {

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

  165.         {

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

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

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

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

  170.         }

  171.     }

  172. 

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

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

  175. 

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

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

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

  179. 

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

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

  182.     {

  183.         XColor color;

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

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

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

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

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

  189.     }

  190. 

  191.     x11_winattr.backing_store = Always;

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

  193.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  194. 

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

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

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

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

  199.                       0, 0, InputOutput, 0,

  200.                       CWBackingStore | CWBackPixel | CWEventMask,

  201.                       &x11_winattr);

  202. 

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

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

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

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

  207. 

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

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

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

  211. 

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

  213. 

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

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

  216. 

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

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

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

  220. 

  221.     for(;;)

  222.     {

  223.         XEvent xevent;

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

  225.         if(xevent.type == MapNotify)

  226.             break;

  227.     }

  228. 

  229. #if defined(HAVE_X11_XKBLIB_H)

  230.     /* Disable autorepeat */

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

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

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

  234. #endif

  235. 

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

  237.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  238.           | ExposureMask;

  239. 

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

  241. 

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

  243. 

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

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

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

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

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

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

  250. 

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

  252. 

  253.     return 0;

  254. }

  255. 

  256. static int x11_end_graphics(caca_display_t *dp)

  257. {

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

  259. #if defined(HAVE_X11_XKBLIB_H)

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

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

  262. #endif

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

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

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

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

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

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

  269. 

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

  271. 

  272.     return 0;

  273. }

  274. 

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

  276. {

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

  278.     return 0;

  279. }

  280. 

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

  282. {

  283.     return cucul_get_canvas_width(dp->cv) * dp->drv.p->font_width;

  284. }

  285. 

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

  287. {

  288.     return cucul_get_canvas_height(dp->cv) * dp->drv.p->font_height;

  289. }

  290. 

  291. static void x11_display(caca_display_t *dp)

  292. {

  293.     uint32_t const *cvchars = (uint32_t const *)cucul_get_canvas_chars(dp->cv);

  294.     uint32_t const *cvattrs = (uint32_t const *)cucul_get_canvas_attrs(dp->cv);

  295.     unsigned int width = cucul_get_canvas_width(dp->cv);

  296.     unsigned int height = cucul_get_canvas_height(dp->cv);

  297.     unsigned int x, y, len;

  298. 

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

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

  301.     for(y = 0; y < height; y++)

  302.     {

  303.         for(x = 0; x < width; x += len)

  304.         {

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

  306.             uint16_t bg = cucul_attr_to_rgb12_bg(*attrs);

  307. 

  308.             len = 1;

  309.             while(x + len < width

  310.                    && cucul_attr_to_rgb12_bg(attrs[len]) == bg)

  311.                 len++;

  312. 

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

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

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

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

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

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

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

  320.         }

  321.     }

  322. 

  323.     /* Then print the foreground characters */

  324.     for(y = 0; y < height; y++)

  325.     {

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

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

  328.         uint32_t const *chars = cvchars + y * width;

  329.         uint32_t const *attrs = cvattrs + y * width;

  330. 

  331.         for(x = 0; x < width; x++, chars++, attrs++)

  332.         {

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

  334.                            dp->drv.p->colors[cucul_attr_to_rgb12_fg(*attrs)]);

  335. 

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

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

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

  339.                           *attrs, *chars);

  340.         }

  341.     }

  342. 

  343.     /* Print the cursor if necessary */

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

  345.     {

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

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

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

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

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

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

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

  353.     }

  354. 

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

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

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

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

  359.               0, 0);

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

  361. }

  362. 

  363. static void x11_handle_resize(caca_display_t *dp)

  364. {

  365.     Pixmap new_pixmap;

  366. 

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

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

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

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

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

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

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

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

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

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

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

  378. }

  379. 

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

  381. {

  382.     unsigned int width = cucul_get_canvas_width(dp->cv);

  383.     unsigned int height = cucul_get_canvas_height(dp->cv);

  384.     XEvent xevent;

  385.     char key;

  386. 

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

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

  389.     {

  390.         KeySym keysym;

  391. 

  392.         /* Expose event */

  393.         if(xevent.type == Expose)

  394.         {

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

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

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

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

  399.             continue;

  400.         }

  401. 

  402.         /* Resize event */

  403.         if(xevent.type == ConfigureNotify)

  404.         {

  405.             unsigned int w, h;

  406. 

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

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

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

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

  411. 

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

  413.                 continue;

  414. 

  415.             dp->resize.w = w;

  416.             dp->resize.h = h;

  417.             dp->resize.resized = 1;

  418. 

  419.             continue;

  420.         }

  421. 

  422.         /* Check for mouse motion events */

  423.         if(xevent.type == MotionNotify)

  424.         {

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

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

  427. 

  428.             if(newx >= width)

  429.                 newx = width - 1;

  430.             if(newy >= height)

  431.                 newy = height - 1;

  432. 

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

  434.                 continue;

  435. 

  436.             dp->mouse.x = newx;

  437.             dp->mouse.y = newy;

  438. 

  439.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  442.             return 1;

  443.         }

  444. 

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

  446.         if(xevent.type == ButtonPress)

  447.         {

  448.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  450.             return 1;

  451.         }

  452. 

  453.         if(xevent.type == ButtonRelease)

  454.         {

  455.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  457.             return 1;

  458.         }

  459. 

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

  461.         if(xevent.type == KeyPress)

  462.             ev->type = CACA_EVENT_KEY_PRESS;

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

  464.             ev->type = CACA_EVENT_KEY_RELEASE;

  465.         else

  466.             continue;

  467. 

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

  469.         {

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

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

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

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

  474.             return 1;

  475.         }

  476. 

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

  478.         switch(keysym)

  479.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  499.             case XK_KP_Page_Up:

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

  501.             case XK_KP_Page_Down:

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

  503.             case XK_KP_Home:

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

  505.             case XK_KP_End:

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

  507. 

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

  509.         }

  510. 

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

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

  513.         return 1;

  514.     }

  515. 

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

  517.     {

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

  519.             continue;

  520. 

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

  522.         {

  523.             ev->type = CACA_EVENT_QUIT;

  524.             return 1;

  525.         }

  526.     }

  527. 

  528.     ev->type = CACA_EVENT_NONE;

  529.     return 0;

  530. }

  531. 

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

  533. {

  534.     Cursor no_ptr;

  535.     Pixmap bm_no;

  536.     XColor black, dummy;

  537.     Colormap colormap;

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

  539. 

  540.     if(flags)

  541.     {

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

  543.         return;

  544.     }

  545. 

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

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

  548.     {

  549.         return;

  550.     }

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

  552.                                   empty, 8, 8);

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

  554.                                  &black, &black, 0, 0);

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

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

  557.     if(bm_no != None)

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

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

  560. 

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

  562. }

  563. 

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

  565. {

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

  567. }

  568. 

  569. /*

  570.  * XXX: following functions are local

  571.  */

  572. 

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

  574. {

  575.     /* Ignore the error */

  576.     return 0;

  577. }

  578. 

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

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

  581. {

  582.     static uint8_t const udlr[] =

  583.     {

  584.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  585.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  586.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  587.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  588.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  589.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  590.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  591.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  592.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  593.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  594.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  595.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  596.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  597.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  598.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  599.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  600.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  601.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  602.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  603.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  604.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  605.     };

  606. 

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

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

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

  610.     int fw;

  611.     XChar2b ch16;

  612. 

  613.     /* Underline */

  614.     if(attr & CUCUL_UNDERLINE)

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

  616. 

  617.     /* Skip spaces and magic stuff */

  618.     if(ch <= 0x00000020)

  619.         return;

  620. 

  621.     if(ch == CUCUL_MAGIC_FULLWIDTH)

  622.         return;

  623. 

  624.     fw = w;

  625.     if(cucul_utf32_is_fullwidth(ch))

  626.         fw *= 2;

  627. 

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

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

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

  631. 

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

  633.     {

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

  635. 

  636.         if(D & 0x04)

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

  638. 

  639.         if(D & 0x01)

  640.             XFillRectangle(dpy, px, gc,

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

  642. 

  643.         if(D & 0x40)

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

  645. 

  646.         if(D & 0x10)

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

  648. 

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

  650. 

  651.         if(D & 0x08)

  652.         {

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

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

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

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

  657.         }

  658. 

  659.         if(D & 0x02)

  660.         {

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

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

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

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

  665.         }

  666. 

  667.         if(D & 0x80)

  668.         {

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

  670.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

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

  673.         }

  674. 

  675.         if(D & 0x20)

  676.         {

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

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

  679.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  682.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  683.         }

  684. 

  685.         return;

  686.     }

  687. 

  688.     switch(ch)

  689.     {

  690.         case 0x000000b7: /* · */

  691.         case 0x00002219: /* ∙ */

  692.         case 0x000030fb: /* ・ */

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

  694.             return;

  695. 

  696.         case 0x00002261: /* ≡ */

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

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

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

  700.             return;

  701. 

  702.         case 0x00002580: /* ▀ */

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

  704.             return;

  705. 

  706.         case 0x00002584: /* ▄ */

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

  708.             return;

  709. 

  710.         case 0x00002588: /* █ */

  711.         case 0x000025ae: /* ▮ */

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

  713.             return;

  714. 

  715.         case 0x0000258c: /* ▌ */

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

  717.             return;

  718. 

  719.         case 0x00002590: /* ▐ */

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

  721.             return;

  722. 

  723.         case 0x000025a0: /* ■ */

  724.         case 0x000025ac: /* ▬ */

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

  726.             return;

  727. 

  728.         case 0x00002593: /* ▓ */

  729.         case 0x00002592: /* ▒ */

  730.         case 0x00002591: /* ░ */

  731.         {

  732.             /* FIXME: this sucks utterly */

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

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

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

  736.             {

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

  738.                     continue;

  739. 

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

  741.             }

  742.             return;

  743.         }

  744. 

  745.         case 0x000025cb: /* ○ */

  746.         case 0x00002022: /* • */

  747.         case 0x000025cf: /* ● */

  748.         {

  749.             int d, xo, yo;

  750. 

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

  752.             if(h < fw)

  753.                 d = h;

  754.             if(d < 1)

  755.                 d = 1;

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

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

  758.             if(ch == 0x000025cb)

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

  760.             else

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

  762.             return;

  763.         }

  764.     }

  765. 

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

  767.     {

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

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

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

  771.     }

  772.     else

  773.     {

  774.         ch16.byte1 = 0;

  775.         ch16.byte2 = cucul_utf32_to_ascii(ch);

  776.     }

  777. 

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

  779. }

  780. 

  781. /*

  782.  * Driver initialisation

  783.  */

  784. 

  785. int x11_install(caca_display_t *dp)

  786. {

  787. #if defined(HAVE_GETENV)

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

  789.         return -1;

  790. #endif

  791. 

  792.     dp->drv.id = CACA_DRIVER_X11;

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

  794. 

  795.     dp->drv.init_graphics = x11_init_graphics;

  796.     dp->drv.end_graphics = x11_end_graphics;

  797.     dp->drv.set_display_title = x11_set_display_title;

  798.     dp->drv.get_display_width = x11_get_display_width;

  799.     dp->drv.get_display_height = x11_get_display_height;

  800.     dp->drv.display = x11_display;

  801.     dp->drv.handle_resize = x11_handle_resize;

  802.     dp->drv.get_event = x11_get_event;

  803.     dp->drv.set_mouse = x11_set_mouse;

  804.     dp->drv.set_cursor = x11_set_cursor;

  805. 

  806.     return 0;

  807. }

  808. 

  809. #endif /* USE_X11 */