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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. 

  22. #if defined(USE_X11)

  23. 

  24. #include <X11/Xlib.h>

  25. #include <X11/Xutil.h>

  26. #include <X11/keysym.h>

  27. #if defined(HAVE_X11_XKBLIB_H)

  28. #   include <X11/XKBlib.h>

  29. #endif

  30. 

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

  32. #include <stdlib.h>

  33. #include <string.h>

  34. 

  35. #include "caca.h"

  36. #include "caca.h"

  37. #include "caca_internals.h"

  38. 

  39. /*

  40.  * Local functions

  41.  */

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

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

  44.                           uint32_t, uint32_t);

  45. 

  46. struct driver_private

  47. {

  48.     Display *dpy;

  49.     Window window;

  50.     Pixmap pixmap;

  51.     GC gc;

  52.     long int event_mask;

  53.     int font_width, font_height;

  54.     int colors[4096];

  55.     Font font;

  56.     XFontStruct *font_struct;

  57.     int font_offset;

  58.     Cursor pointer;

  59.     Atom wm_protocols;

  60.     Atom wm_delete_window;

  61. #if defined(HAVE_X11_XKBLIB_H)

  62.     Bool autorepeat;

  63. #endif

  64.     uint32_t max_char;

  65.     int cursor_flags;

  66. };

  67. 

  68. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  69. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  70. 

  71. static int x11_init_graphics(caca_display_t *dp)

  72. {

  73.     Colormap colormap;

  74.     XSetWindowAttributes x11_winattr;

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

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

  77.     char const *geometry;

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

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

  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.     dp->resize.allow = 1;

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

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

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

  94.     dp->resize.allow = 0;

  95. 

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

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

  98.         return -1;

  99. 

  100. #if defined(HAVE_GETENV)

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

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

  103.         parser = fonts;

  104.     else

  105. #endif

  106.         parser = fonts + 1;

  107. 

  108.     /* Ignore font errors */

  109.     old_error_handler = XSetErrorHandler(x11_error_handler);

  110. 

  111.     /* Parse our font list */

  112.     for( ; ; parser++)

  113.     {

  114.         uint32_t font_max_char;

  115. 

  116.         if(!*parser)

  117.         {

  118.             XSetErrorHandler(old_error_handler);

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

  120.             return -1;

  121.         }

  122. 

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

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

  125.             continue;

  126. 

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

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

  129.         {

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

  131.             continue;

  132.         }

  133. 

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

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

  136.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  140.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  142.         else

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

  144. 

  145.         font_max_char =

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

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

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

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

  150. 

  151.         break;

  152.     }

  153. 

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

  155.     XSetErrorHandler(old_error_handler);

  156. 

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

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

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

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

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

  162.     {

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

  164.         {

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

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

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

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

  169.         }

  170.     }

  171. 

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

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

  174. 

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

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

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

  178. 

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

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

  181.     {

  182.         XColor color;

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

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

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

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

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

  188.     }

  189. 

  190.     x11_winattr.backing_store = Always;

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

  192.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  193. 

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

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

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

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

  198.                       0, 0, InputOutput, 0,

  199.                       CWBackingStore | CWBackPixel | CWEventMask,

  200.                       &x11_winattr);

  201. 

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

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

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

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

  206. 

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

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

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

  210. 

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

  212. 

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

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

  215. 

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

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

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

  219. 

  220.     for(;;)

  221.     {

  222.         XEvent xevent;

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

  224.         if(xevent.type == MapNotify)

  225.             break;

  226.     }

  227. 

  228. #if defined(HAVE_X11_XKBLIB_H)

  229.     /* Disable autorepeat */

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

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

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

  233. #endif

  234. 

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

  236.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  237.           | ExposureMask;

  238. 

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

  240. 

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

  242. 

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

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

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

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

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

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

  249. 

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

  251. 

  252.     return 0;

  253. }

  254. 

  255. static int x11_end_graphics(caca_display_t *dp)

  256. {

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

  258. #if defined(HAVE_X11_XKBLIB_H)

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

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

  261. #endif

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

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

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

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

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

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

  268. 

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

  270. 

  271.     return 0;

  272. }

  273. 

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

  275. {

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

  277.     return 0;

  278. }

  279. 

  280. static int x11_get_display_width(caca_display_t const *dp)

  281. {

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

  283. }

  284. 

  285. static int x11_get_display_height(caca_display_t const *dp)

  286. {

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

  288. }

  289. 

  290. static void x11_display(caca_display_t *dp)

  291. {

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

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

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

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

  296.     int x, y, i, len;

  297. 

  298.     for(i = 0; i < caca_get_dirty_rectangle_count(dp->cv); i++)

  299.     {

  300.         int xmin, ymin, xmax, ymax;

  301. 

  302.         caca_get_dirty_rectangle(dp->cv, i, &xmin, &ymin, &xmax, &ymax);

  303. 

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

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

  306.         for(y = ymin; y <= ymax; y++)

  307.         {

  308.             for(x = xmin; x <= xmax; x += len)

  309.             {

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

  311.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  312. 

  313.                 len = 1;

  314.                 while(x + len < width

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

  316.                     len++;

  317. 

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

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

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

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

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

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

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

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

  326.             }

  327.         }

  328. 

  329.         /* Then print the foreground characters */

  330.         for(y = ymin; y <= ymax; y++)

  331.         {

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

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

  334.             uint32_t const *chars = cvchars + xmin + y * width;

  335.             uint32_t const *attrs = cvattrs + xmin + y * width;

  336. 

  337.             for(x = xmin; x <= xmax; x++, chars++, attrs++)

  338.             {

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

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

  341. 

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

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

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

  345.                               *attrs, *chars);

  346.             }

  347.         }

  348.     }

  349. 

  350.     /* Print the cursor if necessary. FIXME: handle dirty rectangles! */

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

  352.     {

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

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

  355.         x = caca_get_cursor_x(dp->cv);

  356.         y = caca_get_cursor_y(dp->cv);

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

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

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

  360.     }

  361. 

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

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

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

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

  366.               0, 0);

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

  368. }

  369. 

  370. static void x11_handle_resize(caca_display_t *dp)

  371. {

  372.     Pixmap new_pixmap;

  373. 

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

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

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

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

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

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

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

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

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

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

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

  385. }

  386. 

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

  388. {

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

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

  391.     XEvent xevent;

  392.     char key;

  393. 

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

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

  396.     {

  397.         KeySym keysym;

  398. 

  399.         /* Expose event */

  400.         if(xevent.type == Expose)

  401.         {

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

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

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

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

  406.             continue;

  407.         }

  408. 

  409.         /* Resize event */

  410.         if(xevent.type == ConfigureNotify)

  411.         {

  412.             int w, h;

  413. 

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

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

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

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

  418. 

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

  420.                 continue;

  421. 

  422.             dp->resize.w = w;

  423.             dp->resize.h = h;

  424.             dp->resize.resized = 1;

  425. 

  426.             continue;

  427.         }

  428. 

  429.         /* Check for mouse motion events */

  430.         if(xevent.type == MotionNotify)

  431.         {

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

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

  434. 

  435.             if(newx >= width)

  436.                 newx = width - 1;

  437.             if(newy >= height)

  438.                 newy = height - 1;

  439. 

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

  441.                 continue;

  442. 

  443.             dp->mouse.x = newx;

  444.             dp->mouse.y = newy;

  445. 

  446.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  449.             return 1;

  450.         }

  451. 

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

  453.         if(xevent.type == ButtonPress)

  454.         {

  455.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  457.             return 1;

  458.         }

  459. 

  460.         if(xevent.type == ButtonRelease)

  461.         {

  462.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  464.             return 1;

  465.         }

  466. 

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

  468.         if(xevent.type == KeyPress)

  469.             ev->type = CACA_EVENT_KEY_PRESS;

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

  471.             ev->type = CACA_EVENT_KEY_RELEASE;

  472.         else

  473.             continue;

  474. 

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

  476.         {

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

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

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

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

  481.             return 1;

  482.         }

  483. 

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

  485.         switch(keysym)

  486.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  506.             case XK_KP_Page_Up:

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

  508.             case XK_KP_Page_Down:

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

  510.             case XK_KP_Home:

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

  512.             case XK_KP_End:

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

  514. 

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

  516.         }

  517. 

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

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

  520.         return 1;

  521.     }

  522. 

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

  524.     {

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

  526.             continue;

  527. 

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

  529.         {

  530.             ev->type = CACA_EVENT_QUIT;

  531.             return 1;

  532.         }

  533.     }

  534. 

  535.     ev->type = CACA_EVENT_NONE;

  536.     return 0;

  537. }

  538. 

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

  540. {

  541.     Cursor no_ptr;

  542.     Pixmap bm_no;

  543.     XColor black, dummy;

  544.     Colormap colormap;

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

  546. 

  547.     if(flags)

  548.     {

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

  550.         return;

  551.     }

  552. 

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

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

  555.     {

  556.         return;

  557.     }

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

  559.                                   empty, 8, 8);

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

  561.                                  &black, &black, 0, 0);

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

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

  564.     if(bm_no != None)

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

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

  567. 

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

  569. }

  570. 

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

  572. {

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

  574. }

  575. 

  576. /*

  577.  * XXX: following functions are local

  578.  */

  579. 

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

  581. {

  582.     /* Ignore the error */

  583.     return 0;

  584. }

  585. 

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

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

  588. {

  589.     static uint8_t const udlr[] =

  590.     {

  591.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  592.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  593.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  594.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  595.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  596.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  597.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  598.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  599.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  600.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  601.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  602.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  603.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  604.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  605.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  606.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  607.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  608.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  609.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  610.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  611.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  612.     };

  613. 

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

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

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

  617.     int fw;

  618.     XChar2b ch16;

  619. 

  620.     /* Underline */

  621.     if(attr & CACA_UNDERLINE)

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

  623. 

  624.     /* Skip spaces and magic stuff */

  625.     if(ch <= 0x00000020)

  626.         return;

  627. 

  628.     if(ch == CACA_MAGIC_FULLWIDTH)

  629.         return;

  630. 

  631.     fw = w;

  632.     if(caca_utf32_is_fullwidth(ch))

  633.         fw *= 2;

  634. 

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

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

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

  638. 

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

  640.     {

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

  642. 

  643.         if(D & 0x04)

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

  645. 

  646.         if(D & 0x01)

  647.             XFillRectangle(dpy, px, gc,

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

  649. 

  650.         if(D & 0x40)

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

  652. 

  653.         if(D & 0x10)

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

  655. 

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

  657. 

  658.         if(D & 0x08)

  659.         {

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

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

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

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

  664.         }

  665. 

  666.         if(D & 0x02)

  667.         {

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

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

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

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

  672.         }

  673. 

  674.         if(D & 0x80)

  675.         {

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

  677.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  679.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  680.         }

  681. 

  682.         if(D & 0x20)

  683.         {

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

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

  686.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  689.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  690.         }

  691. 

  692.         return;

  693.     }

  694. 

  695.     switch(ch)

  696.     {

  697.         case 0x000000b7: /* · */

  698.         case 0x00002219: /* ∙ */

  699.         case 0x000030fb: /* ・ */

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

  701.             return;

  702. 

  703.         case 0x00002261: /* ≡ */

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

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

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

  707.             return;

  708. 

  709.         case 0x00002580: /* ▀ */

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

  711.             return;

  712. 

  713.         case 0x00002584: /* ▄ */

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

  715.             return;

  716. 

  717.         case 0x00002588: /* █ */

  718.         case 0x000025ae: /* ▮ */

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

  720.             return;

  721. 

  722.         case 0x0000258c: /* ▌ */

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

  724.             return;

  725. 

  726.         case 0x00002590: /* ▐ */

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

  728.             return;

  729. 

  730.         case 0x000025a0: /* ■ */

  731.         case 0x000025ac: /* ▬ */

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

  733.             return;

  734. 

  735.         case 0x00002593: /* ▓ */

  736.         case 0x00002592: /* ▒ */

  737.         case 0x00002591: /* ░ */

  738.         {

  739.             /* FIXME: this sucks utterly */

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

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

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

  743.             {

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

  745.                     continue;

  746. 

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

  748.             }

  749.             return;

  750.         }

  751. 

  752.         case 0x000025cb: /* ○ */

  753.         case 0x00002022: /* • */

  754.         case 0x000025cf: /* ● */

  755.         {

  756.             int d, xo, yo;

  757. 

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

  759.             if(h < fw)

  760.                 d = h;

  761.             if(d < 1)

  762.                 d = 1;

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

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

  765.             if(ch == 0x000025cb)

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

  767.             else

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

  769.             return;

  770.         }

  771.     }

  772. 

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

  774.     {

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

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

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

  778.     }

  779.     else

  780.     {

  781.         ch16.byte1 = 0;

  782.         ch16.byte2 = caca_utf32_to_ascii(ch);

  783.     }

  784. 

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

  786. }

  787. 

  788. /*

  789.  * Driver initialisation

  790.  */

  791. 

  792. int x11_install(caca_display_t *dp)

  793. {

  794. #if defined(HAVE_GETENV)

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

  796.         return -1;

  797. #endif

  798. 

  799.     dp->drv.id = CACA_DRIVER_X11;

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

  801. 

  802.     dp->drv.init_graphics = x11_init_graphics;

  803.     dp->drv.end_graphics = x11_end_graphics;

  804.     dp->drv.set_display_title = x11_set_display_title;

  805.     dp->drv.get_display_width = x11_get_display_width;

  806.     dp->drv.get_display_height = x11_get_display_height;

  807.     dp->drv.display = x11_display;

  808.     dp->drv.handle_resize = x11_handle_resize;

  809.     dp->drv.get_event = x11_get_event;

  810.     dp->drv.set_mouse = x11_set_mouse;

  811.     dp->drv.set_cursor = x11_set_cursor;

  812. 

  813.     return 0;

  814. }

  815. 

  816. #endif /* USE_X11 */