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libcaca/caca/driver_x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org>

  4.  *                All Rights Reserved

  5.  *

  6.  *  $Id$

  7.  *

  8.  *  This library is free software; you can redistribute it and/or

  9.  *  modify it under the terms of the Do What The Fuck You Want To

  10.  *  Public License, Version 2, as published by Sam Hocevar. See

  11.  *  http://sam.zoy.org/wtfpl/COPYING for more details.

  12.  */

  13. 

  14. /*

  15.  *  This file contains the libcaca X11 input and output driver

  16.  */

  17. 

  18. #include "config.h"

  19. #include "common.h"

  20. 

  21. #if defined(USE_X11)

  22. 

  23. #include <X11/Xlib.h>

  24. #include <X11/Xutil.h>

  25. #include <X11/keysym.h>

  26. #if defined(HAVE_X11_XKBLIB_H)

  27. #   include <X11/XKBlib.h>

  28. #endif

  29. 

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

  31. #include <stdlib.h>

  32. 

  33. #include "caca.h"

  34. #include "caca_internals.h"

  35. #include "cucul.h"

  36. #include "cucul_internals.h"

  37. 

  38. /*

  39.  * Local functions

  40.  */

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

  42. 

  43. struct driver_private

  44. {

  45.     Display *dpy;

  46.     Window window;

  47.     Pixmap pixmap;

  48.     GC gc;

  49.     long int event_mask;

  50.     int font_width, font_height;

  51.     int colors[4096];

  52.     Font font;

  53.     XFontStruct *font_struct;

  54.     int font_offset;

  55.     Cursor pointer;

  56.     Atom wm_protocols;

  57.     Atom wm_delete_window;

  58. #if defined(HAVE_X11_XKBLIB_H)

  59.     Bool autorepeat;

  60. #endif

  61. };

  62. 

  63. static int x11_init_graphics(caca_display_t *dp)

  64. {

  65.     Colormap colormap;

  66.     XSetWindowAttributes x11_winattr;

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

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

  69.     char const *geometry;

  70.     unsigned int width = dp->cv->width, height = dp->cv->height;

  71.     int i;

  72. 

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

  74. 

  75. #if defined(HAVE_GETENV)

  76.     geometry = getenv("CACA_GEOMETRY");

  77.     if(geometry && *geometry)

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

  79. #endif

  80. 

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

  82. 

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

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

  85.         return -1;

  86. 

  87. #if defined(HAVE_GETENV)

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

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

  90.         parser = fonts;

  91.     else

  92. #endif

  93.         parser = fonts + 1;

  94. 

  95.     /* Ignore font errors */

  96.     old_error_handler = XSetErrorHandler(x11_error_handler);

  97. 

  98.     /* Parse our font list */

  99.     for( ; ; parser++)

  100.     {

  101.         if(!*parser)

  102.         {

  103.             XSetErrorHandler(old_error_handler);

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

  105.             return -1;

  106.         }

  107. 

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

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

  110.             continue;

  111. 

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

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

  114.         {

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

  116.             continue;

  117.         }

  118. 

  119.         break;

  120.     }

  121. 

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

  123.     XSetErrorHandler(old_error_handler);

  124. 

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

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

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

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

  129. 

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

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

  132.     {

  133.         XColor color;

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

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

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

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

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

  139.     }

  140. 

  141.     x11_winattr.backing_store = Always;

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

  143.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  144. 

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

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

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

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

  149.                       0, 0, InputOutput, 0,

  150.                       CWBackingStore | CWBackPixel | CWEventMask,

  151.                       &x11_winattr);

  152. 

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

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

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

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

  157. 

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

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

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

  161. 

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

  163. 

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

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

  166. 

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

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

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

  170. 

  171.     for(;;)

  172.     {

  173.         XEvent xevent;

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

  175.         if (xevent.type == MapNotify)

  176.             break;

  177.     }

  178. 

  179. #if defined(HAVE_X11_XKBLIB_H)

  180.     /* Disable autorepeat */

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

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

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

  184. #endif

  185. 

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

  187.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  188.           | ExposureMask;

  189. 

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

  191. 

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

  193. 

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

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

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

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

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

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

  200. 

  201.     return 0;

  202. }

  203. 

  204. static int x11_end_graphics(caca_display_t *dp)

  205. {

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

  207. #if defined(HAVE_X11_XKBLIB_H)

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

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

  210. #endif

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

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

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

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

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

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

  217. 

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

  219. 

  220.     return 0;

  221. }

  222. 

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

  224. {

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

  226.     return 0;

  227. }

  228. 

  229. static unsigned int x11_get_display_width(caca_display_t *dp)

  230. {

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

  232. }

  233. 

  234. static unsigned int x11_get_display_height(caca_display_t *dp)

  235. {

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

  237. }

  238. 

  239. static void x11_display(caca_display_t *dp)

  240. {

  241.     unsigned int x, y, len;

  242. 

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

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

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

  246.     {

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

  248.         {

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

  250.             uint16_t bg = _cucul_attr_to_rgb12bg(*attrs);

  251. 

  252.             len = 1;

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

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

  255.                 len++;

  256. 

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

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

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

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

  261.                            len * dp->drv.p->font_width, dp->drv.p->font_height);

  262.         }

  263.     }

  264. 

  265.     /* Then print the foreground characters */

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

  267.     {

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

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

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

  271. 

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

  273.         {

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

  275. 

  276.             /* Skip spaces */

  277.             if(*chars <= 0x00000020)

  278.                 continue;

  279. 

  280.             if(*chars == CUCUL_MAGIC_FULLWIDTH)

  281.                 continue;

  282. 

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

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

  285. 

  286.             /* Plain ASCII, no problem. */

  287.             if(*chars > 0x00000020 && *chars < 0x00000080)

  288.             {

  289.                 char ch = (uint8_t)*chars;

  290.                 XDrawString(dp->drv.p->dpy, dp->drv.p->pixmap, dp->drv.p->gc,

  291.                             x * dp->drv.p->font_width, yoff, &ch, 1);

  292.                 continue;

  293.             }

  294. 

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

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

  297.              * characters, just print '?'. */

  298.             switch(*chars)

  299.             {

  300.                 case 0x000000b7: /* · */

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

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

  303.                                    x * dp->drv.p->font_width

  304.                                      + dp->drv.p->font_width / 2,

  305.                                    y * dp->drv.p->font_height

  306.                                      + dp->drv.p->font_height / 2, 2, 2);

  307.                     break;

  308.                 case 0x00002500: /* ─ */

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

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

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

  312.                                    y * dp->drv.p->font_height

  313.                                      + dp->drv.p->font_height / 2 + 1,

  314.                                    dp->drv.p->font_width, 1);

  315.                     break;

  316.                 case 0x00002580: /* ▀ */

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

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

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

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

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

  322.                                    dp->drv.p->font_height / 2);

  323.                     break;

  324.                 case 0x00002584: /* ▄ */

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

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

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

  328.                                    (y + 1) * dp->drv.p->font_height

  329.                                            - dp->drv.p->font_height / 2,

  330.                                    dp->drv.p->font_width,

  331.                                    dp->drv.p->font_height / 2);

  332.                     break;

  333.                 case 0x00002588: /* █ */

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

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

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

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

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

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

  340.                     break;

  341.                 case 0x0000258c: /* ▌ */

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

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

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

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

  346.                                    dp->drv.p->font_width / 2,

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

  348.                     break;

  349.                 case 0x00002590: /* ▐ */

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

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

  352.                                    (x + 1) * dp->drv.p->font_width

  353.                                            - dp->drv.p->font_width / 2,

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

  355.                                    dp->drv.p->font_width / 2,

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

  357.                     break;

  358.                 case 0x000025a0: /* ■ */

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

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

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

  362.                                    y * dp->drv.p->font_height

  363.                                      + dp->drv.p->font_height / 4,

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

  365.                                    dp->drv.p->font_height / 2);

  366.                     break;

  367.                 case 0x00002593: /* ▓ */

  368.                 case 0x00002592: /* ▒ */

  369.                 case 0x00002591: /* ░ */

  370.                 {

  371.                     /* FIXME: this sucks utterly */

  372.                     int i, j, k = *chars - 0x00002591;

  373.                     for(j = dp->drv.p->font_height; j--; )

  374.                         for(i = dp->drv.p->font_width; i--; )

  375.                     {

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

  377.                             continue;

  378. 

  379.                         XDrawPoint(dp->drv.p->dpy, dp->drv.p->pixmap,

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

  381.                                    x * dp->drv.p->font_width + i,

  382.                                    y * dp->drv.p->font_height + j);

  383.                     }

  384.                     break;

  385.                 }

  386.                 default:

  387.                 {

  388.                     char ch;

  389.                     ch = '?';

  390.                     XDrawString(dp->drv.p->dpy, dp->drv.p->pixmap,

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

  392.                                 x * dp->drv.p->font_width, yoff, &ch, 1);

  393.                     break;

  394.                 }

  395.             }

  396.         }

  397.     }

  398. 

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

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

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

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

  403.               0, 0);

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

  405. }

  406. 

  407. static void x11_handle_resize(caca_display_t *dp)

  408. {

  409.     Pixmap new_pixmap;

  410. 

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

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

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

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

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

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

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

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

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

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

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

  422. }

  423. 

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

  425. {

  426.     XEvent xevent;

  427.     char key;

  428. 

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

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

  431.     {

  432.         KeySym keysym;

  433. 

  434.         /* Expose event */

  435.         if(xevent.type == Expose)

  436.         {

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

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

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

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

  441.             continue;

  442.         }

  443. 

  444.         /* Resize event */

  445.         if(xevent.type == ConfigureNotify)

  446.         {

  447.             unsigned int w, h;

  448. 

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

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

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

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

  453. 

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

  455.                 continue;

  456. 

  457.             dp->resize.w = w;

  458.             dp->resize.h = h;

  459.             dp->resize.resized = 1;

  460. 

  461.             continue;

  462.         }

  463. 

  464.         /* Check for mouse motion events */

  465.         if(xevent.type == MotionNotify)

  466.         {

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

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

  469. 

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

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

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

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

  474. 

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

  476.                 continue;

  477. 

  478.             dp->mouse.x = newx;

  479.             dp->mouse.y = newy;

  480. 

  481.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  484.             return 1;

  485.         }

  486. 

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

  488.         if(xevent.type == ButtonPress)

  489.         {

  490.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  492.             return 1;

  493.         }

  494. 

  495.         if(xevent.type == ButtonRelease)

  496.         {

  497.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  499.             return 1;

  500.         }

  501. 

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

  503.         if(xevent.type == KeyPress)

  504.             ev->type = CACA_EVENT_KEY_PRESS;

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

  506.             ev->type = CACA_EVENT_KEY_RELEASE;

  507.         else

  508.             continue;

  509. 

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

  511.         {

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

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

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

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

  516.             return 1;

  517.         }

  518. 

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

  520.         switch(keysym)

  521.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  541.             case XK_KP_Page_Up:

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

  543.             case XK_KP_Page_Down:

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

  545.             case XK_KP_Home:

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

  547.             case XK_KP_End:

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

  549. 

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

  551.         }

  552. 

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

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

  555.         return 1;

  556.     }

  557. 

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

  559.     {

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

  561.             continue;

  562. 

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

  564.         {

  565.             ev->type = CACA_EVENT_QUIT;

  566.             return 1;

  567.         }

  568.     }

  569. 

  570.     ev->type = CACA_EVENT_NONE;

  571.     return 0;

  572. }

  573. 

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

  575. {

  576.     Cursor no_ptr;

  577.     Pixmap bm_no;

  578.     XColor black, dummy;

  579.     Colormap colormap;

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

  581. 

  582.     if(flags)

  583.     {

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

  585.         return;

  586.     }

  587. 

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

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

  590.     {

  591.         return;

  592.     }

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

  594.                                   empty, 8, 8);

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

  596.                                  &black, &black, 0, 0);

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

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

  599.     if(bm_no != None)

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

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

  602. 

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

  604. }

  605. 

  606. /*

  607.  * XXX: following functions are local

  608.  */

  609. 

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

  611. {

  612.     /* Ignore the error */

  613.     return 0;

  614. }

  615. 

  616. /*

  617.  * Driver initialisation

  618.  */

  619. 

  620. int x11_install(caca_display_t *dp)

  621. {

  622. #if defined(HAVE_GETENV)

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

  624.         return -1;

  625. #endif

  626. 

  627.     dp->drv.driver = CACA_DRIVER_X11;

  628. 

  629.     dp->drv.init_graphics = x11_init_graphics;

  630.     dp->drv.end_graphics = x11_end_graphics;

  631.     dp->drv.set_display_title = x11_set_display_title;

  632.     dp->drv.get_display_width = x11_get_display_width;

  633.     dp->drv.get_display_height = x11_get_display_height;

  634.     dp->drv.display = x11_display;

  635.     dp->drv.handle_resize = x11_handle_resize;

  636.     dp->drv.get_event = x11_get_event;

  637.     dp->drv.set_mouse = x11_set_mouse;

  638. 

  639.     return 0;

  640. }

  641. 

  642. #endif /* USE_X11 */