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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 = 0, height = 0;

  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.     if(width && height)

  82.         _cucul_set_canvas_size(dp->cv, width, height);

  83. 

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

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

  86.         return -1;

  87. 

  88. #if defined(HAVE_GETENV)

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

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

  91.         parser = fonts;

  92.     else

  93. #endif

  94.         parser = fonts + 1;

  95. 

  96.     /* Ignore font errors */

  97.     old_error_handler = XSetErrorHandler(x11_error_handler);

  98. 

  99.     /* Parse our font list */

  100.     for( ; ; parser++)

  101.     {

  102.         if(!*parser)

  103.         {

  104.             XSetErrorHandler(old_error_handler);

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

  106.             return -1;

  107.         }

  108. 

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

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

  111.             continue;

  112. 

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

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

  115.         {

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

  117.             continue;

  118.         }

  119. 

  120.         break;

  121.     }

  122. 

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

  124.     XSetErrorHandler(old_error_handler);

  125. 

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

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

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

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

  130. 

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

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

  133.     {

  134.         XColor color;

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

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

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

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

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

  140.     }

  141. 

  142.     x11_winattr.backing_store = Always;

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

  144.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  145. 

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

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

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

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

  150.                       0, 0, InputOutput, 0,

  151.                       CWBackingStore | CWBackPixel | CWEventMask,

  152.                       &x11_winattr);

  153. 

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

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

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

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

  158. 

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

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

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

  162. 

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

  164. 

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

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

  167. 

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

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

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

  171. 

  172.     for(;;)

  173.     {

  174.         XEvent xevent;

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

  176.         if (xevent.type == MapNotify)

  177.             break;

  178.     }

  179. 

  180. #if defined(HAVE_X11_XKBLIB_H)

  181.     /* Disable autorepeat */

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

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

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

  185. #endif

  186. 

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

  188.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  189.           | ExposureMask;

  190. 

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

  192. 

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

  194. 

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

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

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

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

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

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

  201. 

  202.     return 0;

  203. }

  204. 

  205. static int x11_end_graphics(caca_display_t *dp)

  206. {

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

  208. #if defined(HAVE_X11_XKBLIB_H)

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

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

  211. #endif

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

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

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

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

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

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

  218. 

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

  220. 

  221.     return 0;

  222. }

  223. 

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

  225. {

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

  227.     return 0;

  228. }

  229. 

  230. static unsigned int x11_get_display_width(caca_display_t *dp)

  231. {

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

  233. }

  234. 

  235. static unsigned int x11_get_display_height(caca_display_t *dp)

  236. {

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

  238. }

  239. 

  240. static void x11_display(caca_display_t *dp)

  241. {

  242.     unsigned int x, y, len;

  243. 

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

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

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

  247.     {

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

  249.         {

  250.             uint32_t *attr = dp->cv->attr + x + y * dp->cv->width;

  251.             uint16_t bg = _cucul_argb32_to_rgb12bg(*attr);

  252. 

  253.             len = 1;

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

  255.                    && _cucul_argb32_to_rgb12bg(attr[len]) == bg)

  256.                 len++;

  257. 

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

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

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

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

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

  263.         }

  264.     }

  265. 

  266.     /* Then print the foreground characters */

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

  268.     {

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

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

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

  272. 

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

  274.         {

  275.             uint32_t *attr = dp->cv->attr + x + y * dp->cv->width;

  276. 

  277.             /* Skip spaces */

  278.             if(*chars == 0x00000020)

  279.                 continue;

  280. 

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

  282.                            dp->drv.p->colors[_cucul_argb32_to_rgb12fg(*attr)]);

  283. 

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

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

  286.             {

  287.                 char ch = (uint8_t)*chars;

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

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

  290.                 continue;

  291.             }

  292. 

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

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

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

  296.             switch(*chars)

  297.             {

  298.                 case 0x00002580: /* ▀ */

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

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

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

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

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

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

  305.                     break;

  306.                 case 0x00002584: /* ▄ */

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

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

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

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

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

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

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

  314.                     break;

  315.                 case 0x00002588: /* █ */

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

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

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

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

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

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

  322.                     break;

  323.                 case 0x0000258c: /* ▌ */

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

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

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

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

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

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

  330.                     break;

  331.                 case 0x00002590: /* ▐ */

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

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

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

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

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

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

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

  339.                     break;

  340.                 case 0x000025a0: /* ■ */

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

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

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

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

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

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

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

  348.                     break;

  349.                 case 0x00002593: /* ▓ */

  350.                 case 0x00002592: /* ▒ */

  351.                 case 0x00002591: /* ░ */

  352.                 {

  353.                     /* FIXME: this sucks utterly */

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

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

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

  357.                     {

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

  359.                             continue;

  360. 

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

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

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

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

  365.                     }

  366.                     break;

  367.                 }

  368.                 default:

  369.                 {

  370.                     char ch;

  371.                     ch = '?';

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

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

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

  375.                     break;

  376.                 }

  377.             }

  378.         }

  379.     }

  380. 

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

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

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

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

  385.               0, 0);

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

  387. }

  388. 

  389. static void x11_handle_resize(caca_display_t *dp)

  390. {

  391.     Pixmap new_pixmap;

  392. 

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

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

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

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

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

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

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

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

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

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

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

  404. }

  405. 

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

  407. {

  408.     XEvent xevent;

  409.     char key;

  410. 

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

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

  413.     {

  414.         KeySym keysym;

  415. 

  416.         /* Expose event */

  417.         if(xevent.type == Expose)

  418.         {

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

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

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

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

  423.             continue;

  424.         }

  425. 

  426.         /* Resize event */

  427.         if(xevent.type == ConfigureNotify)

  428.         {

  429.             unsigned int w, h;

  430. 

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

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

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

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

  435. 

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

  437.                 continue;

  438. 

  439.             dp->resize.w = w;

  440.             dp->resize.h = h;

  441.             dp->resize.resized = 1;

  442. 

  443.             continue;

  444.         }

  445. 

  446.         /* Check for mouse motion events */

  447.         if(xevent.type == MotionNotify)

  448.         {

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

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

  451. 

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

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

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

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

  456. 

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

  458.                 continue;

  459. 

  460.             dp->mouse.x = newx;

  461.             dp->mouse.y = newy;

  462. 

  463.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  466.             return 1;

  467.         }

  468. 

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

  470.         if(xevent.type == ButtonPress)

  471.         {

  472.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  474.             return 1;

  475.         }

  476. 

  477.         if(xevent.type == ButtonRelease)

  478.         {

  479.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  481.             return 1;

  482.         }

  483. 

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

  485.         if(xevent.type == KeyPress)

  486.             ev->type = CACA_EVENT_KEY_PRESS;

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

  488.             ev->type = CACA_EVENT_KEY_RELEASE;

  489.         else

  490.             continue;

  491. 

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

  493.         {

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

  495.             ev->data.key.ucs4 = key;

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

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

  498.             return 1;

  499.         }

  500. 

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

  502.         switch(keysym)

  503.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  523.             case XK_KP_Page_Up:

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

  525.             case XK_KP_Page_Down:

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

  527.             case XK_KP_Home:

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

  529.             case XK_KP_End:

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

  531. 

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

  533.         }

  534. 

  535.         ev->data.key.ucs4 = 0;

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

  537.         return 1;

  538.     }

  539. 

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

  541.     {

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

  543.             continue;

  544. 

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

  546.         {

  547.             ev->type = CACA_EVENT_QUIT;

  548.             return 1;

  549.         }

  550.     }

  551. 

  552.     ev->type = CACA_EVENT_NONE;

  553.     return 0;

  554. }

  555. 

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

  557. {

  558.     Cursor no_ptr;

  559.     Pixmap bm_no;

  560.     XColor black, dummy;

  561.     Colormap colormap;

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

  563. 

  564.     if(flags)

  565.     {

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

  567.         return;

  568.     }

  569. 

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

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

  572.     {

  573.         return;

  574.     }

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

  576.                                   empty, 8, 8);

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

  578.                                  &black, &black, 0, 0);

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

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

  581.     if(bm_no != None)

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

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

  584. 

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

  586. }

  587. 

  588. /*

  589.  * XXX: following functions are local

  590.  */

  591. 

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

  593. {

  594.     /* Ignore the error */

  595.     return 0;

  596. }

  597. 

  598. /*

  599.  * Driver initialisation

  600.  */

  601. 

  602. int x11_install(caca_display_t *dp)

  603. {

  604. #if defined(HAVE_GETENV)

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

  606.         return -1;

  607. #endif

  608. 

  609.     dp->drv.driver = CACA_DRIVER_X11;

  610. 

  611.     dp->drv.init_graphics = x11_init_graphics;

  612.     dp->drv.end_graphics = x11_end_graphics;

  613.     dp->drv.set_display_title = x11_set_display_title;

  614.     dp->drv.get_display_width = x11_get_display_width;

  615.     dp->drv.get_display_height = x11_get_display_height;

  616.     dp->drv.display = x11_display;

  617.     dp->drv.handle_resize = x11_handle_resize;

  618.     dp->drv.get_event = x11_get_event;

  619.     dp->drv.set_mouse = x11_set_mouse;

  620. 

  621.     return 0;

  622. }

  623. 

  624. #endif /* USE_X11 */