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libcaca/caca/driver/x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2009 Sam Hocevar <sam@hocevar.net>

  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.     int dirty_cursor_x, dirty_cursor_y;

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

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

  81.     int i;

  82. 

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

  84. 

  85. #if defined(HAVE_GETENV)

  86.     geometry = getenv("CACA_GEOMETRY");

  87.     if(geometry && *geometry)

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

  89. #endif

  90. 

  91.     caca_add_dirty_rect(dp->cv, 0, 0, dp->cv->width, dp->cv->height);

  92.     dp->resize.allow = 1;

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

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

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

  96.     dp->resize.allow = 0;

  97. 

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

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

  100.         return -1;

  101. 

  102. #if defined(HAVE_GETENV)

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

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

  105.         parser = fonts;

  106.     else

  107. #endif

  108.         parser = fonts + 1;

  109. 

  110.     /* Ignore font errors */

  111.     old_error_handler = XSetErrorHandler(x11_error_handler);

  112. 

  113.     /* Parse our font list */

  114.     for( ; ; parser++)

  115.     {

  116.         uint32_t font_max_char;

  117. 

  118.         if(!*parser)

  119.         {

  120.             XSetErrorHandler(old_error_handler);

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

  122.             return -1;

  123.         }

  124. 

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

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

  127.             continue;

  128. 

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

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

  131.         {

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

  133.             continue;

  134.         }

  135. 

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

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

  138.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  142.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  144.         else

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

  146. 

  147.         font_max_char =

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

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

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

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

  152. 

  153.         break;

  154.     }

  155. 

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

  157.     XSetErrorHandler(old_error_handler);

  158. 

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

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

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

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

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

  164.     {

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

  166.         {

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

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

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

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

  171.         }

  172.     }

  173. 

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

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

  176. 

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

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

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

  180. 

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

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

  183.     {

  184.         XColor color;

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

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

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

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

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

  190.     }

  191. 

  192.     x11_winattr.backing_store = Always;

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

  194.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  195. 

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

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

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

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

  200.                       0, 0, InputOutput, 0,

  201.                       CWBackingStore | CWBackPixel | CWEventMask,

  202.                       &x11_winattr);

  203. 

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

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

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

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

  208. 

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

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

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

  212. 

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

  214. 

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

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

  217. 

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

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

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

  221. 

  222.     for(;;)

  223.     {

  224.         XEvent xevent;

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

  226.         if(xevent.type == MapNotify)

  227.             break;

  228.     }

  229. 

  230. #if defined(HAVE_X11_XKBLIB_H)

  231.     /* Disable autorepeat */

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

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

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

  235. #endif

  236. 

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

  238.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  239.           | ExposureMask;

  240. 

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

  242. 

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

  244. 

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

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

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

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

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

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

  251. 

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

  253.     dp->drv.p->dirty_cursor_x = -1;

  254.     dp->drv.p->dirty_cursor_y = -1;

  255. 

  256.     return 0;

  257. }

  258. 

  259. static int x11_end_graphics(caca_display_t *dp)

  260. {

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

  262. #if defined(HAVE_X11_XKBLIB_H)

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

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

  265. #endif

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

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

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

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

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

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

  272. 

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

  274. 

  275.     return 0;

  276. }

  277. 

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

  279. {

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

  281.     return 0;

  282. }

  283. 

  284. static int x11_get_display_width(caca_display_t const *dp)

  285. {

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

  287. }

  288. 

  289. static int x11_get_display_height(caca_display_t const *dp)

  290. {

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

  292. }

  293. 

  294. static void x11_display(caca_display_t *dp)

  295. {

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

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

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

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

  300.     int x, y, i, len;

  301. 

  302.     /* XXX: the magic value -1 is used to handle the cursor area */

  303.     for(i = -1; i < caca_get_dirty_rect_count(dp->cv); i++)

  304.     {

  305.         int dx, dy, dw, dh;

  306. 

  307.         /* Get the dirty rectangle coordinates, either from the previous

  308.          * cursor position, or from the canvas's list. */

  309.         if(i == -1)

  310.         {

  311.             if(dp->drv.p->dirty_cursor_x < 0 || dp->drv.p->dirty_cursor_y < 0

  312.                 || dp->drv.p->dirty_cursor_x >= width

  313.                 || dp->drv.p->dirty_cursor_y >= height)

  314.                 continue;

  315. 

  316.             dx = dp->drv.p->dirty_cursor_x;

  317.             dy = dp->drv.p->dirty_cursor_y;

  318.             dw = dh = 1;

  319. 

  320.             dp->drv.p->dirty_cursor_x = -1;

  321.             dp->drv.p->dirty_cursor_y = -1;

  322.         }

  323.         else

  324.         {

  325.             caca_get_dirty_rect(dp->cv, i, &dx, &dy, &dw, &dh);

  326.         }

  327. 

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

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

  330.         for(y = dy; y < dy + dh; y++)

  331.         {

  332.             for(x = dx; x < dx + dw; x += len)

  333.             {

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

  335.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  336. 

  337.                 len = 1;

  338.                 while(x + len < dx + dw

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

  340.                     len++;

  341. 

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

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

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

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

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

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

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

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

  350.             }

  351.         }

  352. 

  353.         /* Then print the foreground characters */

  354.         for(y = dy; y < dy + dh; y++)

  355.         {

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

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

  358.             uint32_t const *chars = cvchars + dx + y * width;

  359.             uint32_t const *attrs = cvattrs + dx + y * width;

  360. 

  361.             for(x = dx; x < dx + dw; x++, chars++, attrs++)

  362.             {

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

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

  365. 

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

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

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

  369.                               *attrs, *chars);

  370.             }

  371.         }

  372.     }

  373. 

  374.     /* Print the cursor if necessary. */

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

  376.     {

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

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

  379.         x = caca_wherex(dp->cv);

  380.         y = caca_wherey(dp->cv);

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

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

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

  384. 

  385.         /* Mark the area as dirty */

  386.         dp->drv.p->dirty_cursor_x = x;

  387.         dp->drv.p->dirty_cursor_y = y;

  388.     }

  389. 

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

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

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

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

  394.               0, 0);

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

  396. }

  397. 

  398. static void x11_handle_resize(caca_display_t *dp)

  399. {

  400.     Pixmap new_pixmap;

  401. 

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

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

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

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

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

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

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

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

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

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

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

  413. }

  414. 

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

  416. {

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

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

  419.     XEvent xevent;

  420.     char key;

  421. 

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

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

  424.     {

  425.         KeySym keysym;

  426. 

  427.         /* Expose event */

  428.         if(xevent.type == Expose)

  429.         {

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

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

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

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

  434.             continue;

  435.         }

  436. 

  437.         /* Resize event */

  438.         if(xevent.type == ConfigureNotify)

  439.         {

  440.             int w, h;

  441. 

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

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

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

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

  446. 

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

  448.                 continue;

  449. 

  450.             dp->resize.w = w;

  451.             dp->resize.h = h;

  452.             dp->resize.resized = 1;

  453. 

  454.             continue;

  455.         }

  456. 

  457.         /* Check for mouse motion events */

  458.         if(xevent.type == MotionNotify)

  459.         {

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

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

  462. 

  463.             if(newx >= width)

  464.                 newx = width - 1;

  465.             if(newy >= height)

  466.                 newy = height - 1;

  467. 

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

  469.                 continue;

  470. 

  471.             dp->mouse.x = newx;

  472.             dp->mouse.y = newy;

  473. 

  474.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  477.             return 1;

  478.         }

  479. 

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

  481.         if(xevent.type == ButtonPress)

  482.         {

  483.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  485.             return 1;

  486.         }

  487. 

  488.         if(xevent.type == ButtonRelease)

  489.         {

  490.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  492.             return 1;

  493.         }

  494. 

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

  496.         if(xevent.type == KeyPress)

  497.             ev->type = CACA_EVENT_KEY_PRESS;

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

  499.             ev->type = CACA_EVENT_KEY_RELEASE;

  500.         else

  501.             continue;

  502. 

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

  504.         {

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

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

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

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

  509.             return 1;

  510.         }

  511. 

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

  513.         switch(keysym)

  514.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  534.             case XK_KP_Page_Up:

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

  536.             case XK_KP_Page_Down:

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

  538.             case XK_KP_Home:

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

  540.             case XK_KP_End:

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

  542. 

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

  544.         }

  545. 

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

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

  548.         return 1;

  549.     }

  550. 

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

  552.     {

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

  554.             continue;

  555. 

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

  557.         {

  558.             ev->type = CACA_EVENT_QUIT;

  559.             return 1;

  560.         }

  561.     }

  562. 

  563.     ev->type = CACA_EVENT_NONE;

  564.     return 0;

  565. }

  566. 

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

  568. {

  569.     Cursor no_ptr;

  570.     Pixmap bm_no;

  571.     XColor black, dummy;

  572.     Colormap colormap;

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

  574. 

  575.     if(flags)

  576.     {

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

  578.         return;

  579.     }

  580. 

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

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

  583.     {

  584.         return;

  585.     }

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

  587.                                   empty, 8, 8);

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

  589.                                  &black, &black, 0, 0);

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

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

  592.     if(bm_no != None)

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

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

  595. 

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

  597. }

  598. 

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

  600. {

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

  602. }

  603. 

  604. /*

  605.  * XXX: following functions are local

  606.  */

  607. 

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

  609. {

  610.     /* Ignore the error */

  611.     return 0;

  612. }

  613. 

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

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

  616. {

  617.     static uint8_t const udlr[] =

  618.     {

  619.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  620.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  621.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  622.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  623.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  624.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  625.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  626.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  627.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  628.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  629.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  630.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  631.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  632.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  633.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  634.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  635.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  636.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  637.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  638.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  639.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  640.     };

  641. 

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

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

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

  645.     int fw;

  646.     XChar2b ch16;

  647. 

  648.     /* Underline */

  649.     if(attr & CACA_UNDERLINE)

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

  651. 

  652.     /* Skip spaces and magic stuff */

  653.     if(ch <= 0x00000020)

  654.         return;

  655. 

  656.     if(ch == CACA_MAGIC_FULLWIDTH)

  657.         return;

  658. 

  659.     fw = w;

  660.     if(caca_utf32_is_fullwidth(ch))

  661.         fw *= 2;

  662. 

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

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

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

  666. 

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

  668.     {

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

  670. 

  671.         if(D & 0x04)

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

  673. 

  674.         if(D & 0x01)

  675.             XFillRectangle(dpy, px, gc,

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

  677. 

  678.         if(D & 0x40)

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

  680. 

  681.         if(D & 0x10)

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

  683. 

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

  685. 

  686.         if(D & 0x08)

  687.         {

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

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

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

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

  692.         }

  693. 

  694.         if(D & 0x02)

  695.         {

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

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

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

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

  700.         }

  701. 

  702.         if(D & 0x80)

  703.         {

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

  705.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  707.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  708.         }

  709. 

  710.         if(D & 0x20)

  711.         {

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

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

  714.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  717.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  718.         }

  719. 

  720.         return;

  721.     }

  722. 

  723.     switch(ch)

  724.     {

  725.         case 0x000000b7: /* · */

  726.         case 0x00002219: /* ∙ */

  727.         case 0x000030fb: /* ・ */

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

  729.             return;

  730. 

  731.         case 0x00002261: /* ≡ */

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

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

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

  735.             return;

  736. 

  737.         case 0x00002580: /* ▀ */

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

  739.             return;

  740. 

  741.         case 0x00002584: /* ▄ */

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

  743.             return;

  744. 

  745.         case 0x00002588: /* █ */

  746.         case 0x000025ae: /* ▮ */

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

  748.             return;

  749. 

  750.         case 0x0000258c: /* ▌ */

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

  752.             return;

  753. 

  754.         case 0x00002590: /* ▐ */

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

  756.             return;

  757. 

  758.         case 0x000025a0: /* ■ */

  759.         case 0x000025ac: /* ▬ */

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

  761.             return;

  762. 

  763.         case 0x00002593: /* ▓ */

  764.         case 0x00002592: /* ▒ */

  765.         case 0x00002591: /* ░ */

  766.         {

  767.             /* FIXME: this sucks utterly */

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

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

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

  771.             {

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

  773.                     continue;

  774. 

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

  776.             }

  777.             return;

  778.         }

  779. 

  780.         case 0x000025cb: /* ○ */

  781.         case 0x00002022: /* • */

  782.         case 0x000025cf: /* ● */

  783.         {

  784.             int d, xo, yo;

  785. 

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

  787.             if(h < fw)

  788.                 d = h;

  789.             if(d < 1)

  790.                 d = 1;

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

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

  793.             if(ch == 0x000025cb)

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

  795.             else

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

  797.             return;

  798.         }

  799.     }

  800. 

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

  802.     {

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

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

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

  806.     }

  807.     else

  808.     {

  809.         ch16.byte1 = 0;

  810.         ch16.byte2 = caca_utf32_to_ascii(ch);

  811.     }

  812. 

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

  814. }

  815. 

  816. /*

  817.  * Driver initialisation

  818.  */

  819. 

  820. int x11_install(caca_display_t *dp)

  821. {

  822. #if defined(HAVE_GETENV)

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

  824.         return -1;

  825. #endif

  826. 

  827.     dp->drv.id = CACA_DRIVER_X11;

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

  829. 

  830.     dp->drv.init_graphics = x11_init_graphics;

  831.     dp->drv.end_graphics = x11_end_graphics;

  832.     dp->drv.set_display_title = x11_set_display_title;

  833.     dp->drv.get_display_width = x11_get_display_width;

  834.     dp->drv.get_display_height = x11_get_display_height;

  835.     dp->drv.display = x11_display;

  836.     dp->drv.handle_resize = x11_handle_resize;

  837.     dp->drv.get_event = x11_get_event;

  838.     dp->drv.set_mouse = x11_set_mouse;

  839.     dp->drv.set_cursor = x11_set_cursor;

  840. 

  841.     return 0;

  842. }

  843. 

  844. #endif /* USE_X11 */