cacalabs
/
libcaca
mirror of https://github.com/cacalabs/libcaca.git
1
0
Fork 0
Code Issues 0 Releases 7 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1075 Commits
1 Branch
26 MiB
 
 
 
 
 
 
Tree: 1c5b493d21
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '1c5b493d21'
${ noResults }
libcaca/caca/driver_x11.c

780 lines
25 KiB
Raw Blame History 

  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. };

  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 = dp->cv->width, height = dp->cv->height;

  80.     int i;

  81. 

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

  83. 

  84. #if defined(HAVE_GETENV)

  85.     geometry = getenv("CACA_GEOMETRY");

  86.     if(geometry && *geometry)

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

  88. #endif

  89. 

  90.     _cucul_set_canvas_size(dp->cv, width ? width : 80, height ? height : 32);

  91. 

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

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

  94.         return -1;

  95. 

  96. #if defined(HAVE_GETENV)

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

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

  99.         parser = fonts;

  100.     else

  101. #endif

  102.         parser = fonts + 1;

  103. 

  104.     /* Ignore font errors */

  105.     old_error_handler = XSetErrorHandler(x11_error_handler);

  106. 

  107.     /* Parse our font list */

  108.     for( ; ; parser++)

  109.     {

  110.         unsigned int font_max_char;

  111. 

  112.         if(!*parser)

  113.         {

  114.             XSetErrorHandler(old_error_handler);

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

  116.             return -1;

  117.         }

  118. 

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

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

  121.             continue;

  122. 

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

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

  125.         {

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

  127.             continue;

  128.         }

  129. 

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

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

  132.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  136.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  138.         else

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

  140. 

  141.         font_max_char = 

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

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

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

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

  146. 

  147.         break;

  148.     }

  149. 

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

  151.     XSetErrorHandler(old_error_handler);

  152.     

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

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

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

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

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

  158.     {

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

  160.         {

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

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

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

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

  165.         }

  166.     }

  167. 

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

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

  170. 

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

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

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

  174. 

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

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

  177.     {

  178.         XColor color;

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

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

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

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

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

  184.     }

  185. 

  186.     x11_winattr.backing_store = Always;

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

  188.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  189. 

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

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

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

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

  194.                       0, 0, InputOutput, 0,

  195.                       CWBackingStore | CWBackPixel | CWEventMask,

  196.                       &x11_winattr);

  197. 

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

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

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

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

  202. 

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

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

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

  206. 

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

  208. 

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

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

  211. 

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

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

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

  215. 

  216.     for(;;)

  217.     {

  218.         XEvent xevent;

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

  220.         if(xevent.type == MapNotify)

  221.             break;

  222.     }

  223. 

  224. #if defined(HAVE_X11_XKBLIB_H)

  225.     /* Disable autorepeat */

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

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

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

  229. #endif

  230. 

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

  232.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  233.           | ExposureMask;

  234. 

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

  236. 

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

  238. 

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

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

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

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

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

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

  245. 

  246.     return 0;

  247. }

  248. 

  249. static int x11_end_graphics(caca_display_t *dp)

  250. {

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

  252. #if defined(HAVE_X11_XKBLIB_H)

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

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

  255. #endif

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

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

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

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

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

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

  262. 

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

  264. 

  265.     return 0;

  266. }

  267. 

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

  269. {

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

  271.     return 0;

  272. }

  273. 

  274. static unsigned int x11_get_display_width(caca_display_t *dp)

  275. {

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

  277. }

  278. 

  279. static unsigned int x11_get_display_height(caca_display_t *dp)

  280. {

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

  282. }

  283. 

  284. static void x11_display(caca_display_t *dp)

  285. {

  286.     unsigned int x, y, len;

  287. 

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

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

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

  291.     {

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

  293.         {

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

  295.             uint16_t bg = _cucul_attr_to_rgb12bg(*attrs);

  296. 

  297.             len = 1;

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

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

  300.                 len++;

  301. 

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

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

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

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

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

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

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

  309.         }

  310.     }

  311. 

  312.     /* Then print the foreground characters */

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

  314.     {

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

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

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

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

  319. 

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

  321.         {

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

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

  324. 

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

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

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

  328.                           *attrs, *chars);

  329.         }

  330.     }

  331. 

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

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

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

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

  336.               0, 0);

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

  338. }

  339. 

  340. static void x11_handle_resize(caca_display_t *dp)

  341. {

  342.     Pixmap new_pixmap;

  343. 

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

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

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

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

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

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

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

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

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

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

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

  355. }

  356. 

  357. static int x11_get_event(caca_display_t *dp, caca_event_t *ev)

  358. {

  359.     XEvent xevent;

  360.     char key;

  361. 

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

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

  364.     {

  365.         KeySym keysym;

  366. 

  367.         /* Expose event */

  368.         if(xevent.type == Expose)

  369.         {

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

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

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

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

  374.             continue;

  375.         }

  376. 

  377.         /* Resize event */

  378.         if(xevent.type == ConfigureNotify)

  379.         {

  380.             unsigned int w, h;

  381. 

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

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

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

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

  386. 

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

  388.                 continue;

  389. 

  390.             dp->resize.w = w;

  391.             dp->resize.h = h;

  392.             dp->resize.resized = 1;

  393. 

  394.             continue;

  395.         }

  396. 

  397.         /* Check for mouse motion events */

  398.         if(xevent.type == MotionNotify)

  399.         {

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

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

  402. 

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

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

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

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

  407. 

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

  409.                 continue;

  410. 

  411.             dp->mouse.x = newx;

  412.             dp->mouse.y = newy;

  413. 

  414.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  417.             return 1;

  418.         }

  419. 

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

  421.         if(xevent.type == ButtonPress)

  422.         {

  423.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  425.             return 1;

  426.         }

  427. 

  428.         if(xevent.type == ButtonRelease)

  429.         {

  430.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  432.             return 1;

  433.         }

  434. 

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

  436.         if(xevent.type == KeyPress)

  437.             ev->type = CACA_EVENT_KEY_PRESS;

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

  439.             ev->type = CACA_EVENT_KEY_RELEASE;

  440.         else

  441.             continue;

  442. 

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

  444.         {

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

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

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

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

  449.             return 1;

  450.         }

  451. 

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

  453.         switch(keysym)

  454.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  474.             case XK_KP_Page_Up:

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

  476.             case XK_KP_Page_Down:

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

  478.             case XK_KP_Home:

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

  480.             case XK_KP_End:

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

  482. 

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

  484.         }

  485. 

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

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

  488.         return 1;

  489.     }

  490. 

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

  492.     {

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

  494.             continue;

  495. 

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

  497.         {

  498.             ev->type = CACA_EVENT_QUIT;

  499.             return 1;

  500.         }

  501.     }

  502. 

  503.     ev->type = CACA_EVENT_NONE;

  504.     return 0;

  505. }

  506. 

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

  508. {

  509.     Cursor no_ptr;

  510.     Pixmap bm_no;

  511.     XColor black, dummy;

  512.     Colormap colormap;

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

  514. 

  515.     if(flags)

  516.     {

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

  518.         return;

  519.     }

  520. 

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

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

  523.     {

  524.         return;

  525.     }

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

  527.                                   empty, 8, 8);

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

  529.                                  &black, &black, 0, 0);

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

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

  532.     if(bm_no != None)

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

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

  535. 

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

  537. }

  538. 

  539. /*

  540.  * XXX: following functions are local

  541.  */

  542. 

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

  544. {

  545.     /* Ignore the error */

  546.     return 0;

  547. }

  548. 

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

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

  551. {

  552.     static uint8_t const udlr[] =

  553.     {

  554.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  555.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  556.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  557.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  558.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  559.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  560.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  561.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  562.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  563.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  564.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  565.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  566.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  567.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  568.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  569.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  570.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  571.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  572.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  573.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  574.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  575.     };

  576. 

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

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

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

  580.     int fw;

  581.     XChar2b ch16;

  582. 

  583.     /* Underline */

  584.     if(attr & CUCUL_UNDERLINE)

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

  586. 

  587.     /* Skip spaces and magic stuff */

  588.     if(ch <= 0x00000020)

  589.         return;

  590. 

  591.     if(ch == CUCUL_MAGIC_FULLWIDTH)

  592.         return;

  593. 

  594.     fw = w;

  595.     if(cucul_utf32_is_fullwidth(ch))

  596.         fw *= 2;

  597. 

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

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

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

  601. 

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

  603.     {

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

  605. 

  606.         if(D & 0x04)

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

  608. 

  609.         if(D & 0x01)

  610.             XFillRectangle(dpy, px, gc,

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

  612. 

  613.         if(D & 0x40)

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

  615. 

  616.         if(D & 0x10)

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

  618. 

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

  620. 

  621.         if(D & 0x08)

  622.         {

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

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

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

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

  627.         }

  628. 

  629.         if(D & 0x02)

  630.         {

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

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

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

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

  635.         }

  636. 

  637.         if(D & 0x80)

  638.         {

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

  640.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  642.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  643.         }

  644. 

  645.         if(D & 0x20)

  646.         {

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

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

  649.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  652.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  653.         }

  654. 

  655.         return;

  656.     }

  657. 

  658.     switch(ch)

  659.     {

  660.         case 0x000000b7: /* · */

  661.         case 0x00002219: /* ∙ */

  662.         case 0x000030fb: /* ・ */

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

  664.             return;

  665. 

  666.         case 0x00002261: /* ≡ */

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

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

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

  670.             return;

  671. 

  672.         case 0x00002580: /* ▀ */

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

  674.             return;

  675. 

  676.         case 0x00002584: /* ▄ */

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

  678.             return;

  679. 

  680.         case 0x00002588: /* █ */

  681.         case 0x000025ae: /* ▮ */

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

  683.             return;

  684. 

  685.         case 0x0000258c: /* ▌ */

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

  687.             return;

  688. 

  689.         case 0x00002590: /* ▐ */

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

  691.             return;

  692. 

  693.         case 0x000025a0: /* ■ */

  694.         case 0x000025ac: /* ▬ */

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

  696.             return;

  697. 

  698.         case 0x00002593: /* ▓ */

  699.         case 0x00002592: /* ▒ */

  700.         case 0x00002591: /* ░ */

  701.         {

  702.             /* FIXME: this sucks utterly */

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

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

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

  706.             {

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

  708.                     continue;

  709. 

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

  711.             }

  712.             return;

  713.         }

  714. 

  715.         case 0x000025cb: /* ○ */

  716.         case 0x00002022: /* • */

  717.         case 0x000025cf: /* ● */

  718.         {

  719.             int d, xo, yo;

  720. 

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

  722.             if(h < fw)

  723.                 d = h;

  724.             if(d < 1)

  725.                 d = 1;

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

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

  728.             if(ch == 0x000025cb)

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

  730.             else

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

  732.             return;

  733.         }

  734.     }

  735. 

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

  737.     {

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

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

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

  741.     }

  742.     else

  743.     {

  744.         ch16.byte1 = 0;

  745.         ch16.byte2 = cucul_utf32_to_ascii(ch);

  746.     }

  747. 

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

  749. }

  750. 

  751. /*

  752.  * Driver initialisation

  753.  */

  754. 

  755. int x11_install(caca_display_t *dp)

  756. {

  757. #if defined(HAVE_GETENV)

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

  759.         return -1;

  760. #endif

  761. 

  762.     dp->drv.driver = CACA_DRIVER_X11;

  763. 

  764.     dp->drv.init_graphics = x11_init_graphics;

  765.     dp->drv.end_graphics = x11_end_graphics;

  766.     dp->drv.set_display_title = x11_set_display_title;

  767.     dp->drv.get_display_width = x11_get_display_width;

  768.     dp->drv.get_display_height = x11_get_display_height;

  769.     dp->drv.display = x11_display;

  770.     dp->drv.handle_resize = x11_handle_resize;

  771.     dp->drv.get_event = x11_get_event;

  772.     dp->drv.set_mouse = x11_set_mouse;

  773.     dp->drv.set_cursor = NULL;

  774. 

  775.     return 0;

  776. }

  777. 

  778. #endif /* USE_X11 */