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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, len;

  297.     int xmin, ymin, xmax, ymax;

  298. 

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

  300.     if(xmin > xmax || ymin > ymax)

  301.         return;

  302. 

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

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

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

  306.     {

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

  308.         {

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

  310.             uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  311. 

  312.             len = 1;

  313.             while(x + len < width

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

  315.                 len++;

  316. 

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

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

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

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

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

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

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

  324.         }

  325.     }

  326. 

  327.     /* Then print the foreground characters */

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

  329.     {

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

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

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

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

  334. 

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

  336.         {

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

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

  339. 

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

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

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

  343.                           *attrs, *chars);

  344.         }

  345.     }

  346. 

  347.     /* Print the cursor if necessary */

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

  349.     {

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

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

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

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

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

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

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

  357.     }

  358. 

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

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

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

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

  363.               0, 0);

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

  365. }

  366. 

  367. static void x11_handle_resize(caca_display_t *dp)

  368. {

  369.     Pixmap new_pixmap;

  370. 

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

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

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

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

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

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

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

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

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

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

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

  382. }

  383. 

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

  385. {

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

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

  388.     XEvent xevent;

  389.     char key;

  390. 

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

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

  393.     {

  394.         KeySym keysym;

  395. 

  396.         /* Expose event */

  397.         if(xevent.type == Expose)

  398.         {

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

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

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

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

  403.             continue;

  404.         }

  405. 

  406.         /* Resize event */

  407.         if(xevent.type == ConfigureNotify)

  408.         {

  409.             int w, h;

  410. 

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

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

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

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

  415. 

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

  417.                 continue;

  418. 

  419.             dp->resize.w = w;

  420.             dp->resize.h = h;

  421.             dp->resize.resized = 1;

  422. 

  423.             continue;

  424.         }

  425. 

  426.         /* Check for mouse motion events */

  427.         if(xevent.type == MotionNotify)

  428.         {

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

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

  431. 

  432.             if(newx >= width)

  433.                 newx = width - 1;

  434.             if(newy >= height)

  435.                 newy = height - 1;

  436. 

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

  438.                 continue;

  439. 

  440.             dp->mouse.x = newx;

  441.             dp->mouse.y = newy;

  442. 

  443.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  446.             return 1;

  447.         }

  448. 

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

  450.         if(xevent.type == ButtonPress)

  451.         {

  452.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  454.             return 1;

  455.         }

  456. 

  457.         if(xevent.type == ButtonRelease)

  458.         {

  459.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  461.             return 1;

  462.         }

  463. 

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

  465.         if(xevent.type == KeyPress)

  466.             ev->type = CACA_EVENT_KEY_PRESS;

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

  468.             ev->type = CACA_EVENT_KEY_RELEASE;

  469.         else

  470.             continue;

  471. 

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

  473.         {

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

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

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

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

  478.             return 1;

  479.         }

  480. 

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

  482.         switch(keysym)

  483.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  503.             case XK_KP_Page_Up:

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

  505.             case XK_KP_Page_Down:

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

  507.             case XK_KP_Home:

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

  509.             case XK_KP_End:

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

  511. 

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

  513.         }

  514. 

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

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

  517.         return 1;

  518.     }

  519. 

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

  521.     {

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

  523.             continue;

  524. 

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

  526.         {

  527.             ev->type = CACA_EVENT_QUIT;

  528.             return 1;

  529.         }

  530.     }

  531. 

  532.     ev->type = CACA_EVENT_NONE;

  533.     return 0;

  534. }

  535. 

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

  537. {

  538.     Cursor no_ptr;

  539.     Pixmap bm_no;

  540.     XColor black, dummy;

  541.     Colormap colormap;

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

  543. 

  544.     if(flags)

  545.     {

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

  547.         return;

  548.     }

  549. 

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

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

  552.     {

  553.         return;

  554.     }

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

  556.                                   empty, 8, 8);

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

  558.                                  &black, &black, 0, 0);

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

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

  561.     if(bm_no != None)

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

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

  564. 

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

  566. }

  567. 

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

  569. {

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

  571. }

  572. 

  573. /*

  574.  * XXX: following functions are local

  575.  */

  576. 

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

  578. {

  579.     /* Ignore the error */

  580.     return 0;

  581. }

  582. 

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

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

  585. {

  586.     static uint8_t const udlr[] =

  587.     {

  588.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  589.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  590.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  591.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  592.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  593.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  594.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  595.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  596.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  597.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  598.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  599.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  600.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

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

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

  603.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  604.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  605.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  606.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  607.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  608.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  609.     };

  610. 

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

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

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

  614.     int fw;

  615.     XChar2b ch16;

  616. 

  617.     /* Underline */

  618.     if(attr & CACA_UNDERLINE)

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

  620. 

  621.     /* Skip spaces and magic stuff */

  622.     if(ch <= 0x00000020)

  623.         return;

  624. 

  625.     if(ch == CACA_MAGIC_FULLWIDTH)

  626.         return;

  627. 

  628.     fw = w;

  629.     if(caca_utf32_is_fullwidth(ch))

  630.         fw *= 2;

  631. 

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

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

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

  635. 

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

  637.     {

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

  639. 

  640.         if(D & 0x04)

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

  642. 

  643.         if(D & 0x01)

  644.             XFillRectangle(dpy, px, gc,

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

  646. 

  647.         if(D & 0x40)

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

  649. 

  650.         if(D & 0x10)

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

  652. 

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

  654. 

  655.         if(D & 0x08)

  656.         {

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

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

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

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

  661.         }

  662. 

  663.         if(D & 0x02)

  664.         {

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

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

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

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

  669.         }

  670. 

  671.         if(D & 0x80)

  672.         {

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

  674.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  676.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  677.         }

  678. 

  679.         if(D & 0x20)

  680.         {

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

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

  683.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  686.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  687.         }

  688. 

  689.         return;

  690.     }

  691. 

  692.     switch(ch)

  693.     {

  694.         case 0x000000b7: /* · */

  695.         case 0x00002219: /* ∙ */

  696.         case 0x000030fb: /* ・ */

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

  698.             return;

  699. 

  700.         case 0x00002261: /* ≡ */

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

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

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

  704.             return;

  705. 

  706.         case 0x00002580: /* ▀ */

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

  708.             return;

  709. 

  710.         case 0x00002584: /* ▄ */

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

  712.             return;

  713. 

  714.         case 0x00002588: /* █ */

  715.         case 0x000025ae: /* ▮ */

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

  717.             return;

  718. 

  719.         case 0x0000258c: /* ▌ */

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

  721.             return;

  722. 

  723.         case 0x00002590: /* ▐ */

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

  725.             return;

  726. 

  727.         case 0x000025a0: /* ■ */

  728.         case 0x000025ac: /* ▬ */

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

  730.             return;

  731. 

  732.         case 0x00002593: /* ▓ */

  733.         case 0x00002592: /* ▒ */

  734.         case 0x00002591: /* ░ */

  735.         {

  736.             /* FIXME: this sucks utterly */

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

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

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

  740.             {

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

  742.                     continue;

  743. 

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

  745.             }

  746.             return;

  747.         }

  748. 

  749.         case 0x000025cb: /* ○ */

  750.         case 0x00002022: /* • */

  751.         case 0x000025cf: /* ● */

  752.         {

  753.             int d, xo, yo;

  754. 

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

  756.             if(h < fw)

  757.                 d = h;

  758.             if(d < 1)

  759.                 d = 1;

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

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

  762.             if(ch == 0x000025cb)

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

  764.             else

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

  766.             return;

  767.         }

  768.     }

  769. 

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

  771.     {

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

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

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

  775.     }

  776.     else

  777.     {

  778.         ch16.byte1 = 0;

  779.         ch16.byte2 = caca_utf32_to_ascii(ch);

  780.     }

  781. 

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

  783. }

  784. 

  785. /*

  786.  * Driver initialisation

  787.  */

  788. 

  789. int x11_install(caca_display_t *dp)

  790. {

  791. #if defined(HAVE_GETENV)

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

  793.         return -1;

  794. #endif

  795. 

  796.     dp->drv.id = CACA_DRIVER_X11;

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

  798. 

  799.     dp->drv.init_graphics = x11_init_graphics;

  800.     dp->drv.end_graphics = x11_end_graphics;

  801.     dp->drv.set_display_title = x11_set_display_title;

  802.     dp->drv.get_display_width = x11_get_display_width;

  803.     dp->drv.get_display_height = x11_get_display_height;

  804.     dp->drv.display = x11_display;

  805.     dp->drv.handle_resize = x11_handle_resize;

  806.     dp->drv.get_event = x11_get_event;

  807.     dp->drv.set_mouse = x11_set_mouse;

  808.     dp->drv.set_cursor = x11_set_cursor;

  809. 

  810.     return 0;

  811. }

  812. 

  813. #endif /* USE_X11 */