cacalabs
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libcaca
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libcaca/caca/driver/x11.c

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32 KiB
Неформатований Звинувачення Історія 

  1. /*

  2.  *  libcaca     Colour ASCII-Art library

  3.  *  Copyright © 2002—2016 Sam Hocevar <sam@hocevar.net>

  4.  *              2007 Ben Wiley Sittler <bsittler@gmail.com>

  5.  *              All Rights Reserved

  6.  *

  7.  *  This library is free software. It comes without any warranty, to

  8.  *  the extent permitted by applicable law. You can redistribute it

  9.  *  and/or modify it under the terms of the Do What the Fuck You Want

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

  11.  *  http://www.wtfpl.net/ for more details.

  12.  */

  13. 

  14. /*

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

  16.  */

  17. 

  18. #include "config.h"

  19. 

  20. #if defined(USE_X11)

  21. 

  22. #include <X11/Xlib.h>

  23. #include <X11/Xutil.h>

  24. #include <X11/keysym.h>

  25. #if defined HAVE_X11_XKBLIB_H

  26. #   include <X11/XKBlib.h>

  27. #endif

  28. 

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

  30. #include <stdlib.h>

  31. #include <string.h>

  32. #if defined HAVE_LOCALE_H

  33. #   include <locale.h>

  34. #endif

  35. 

  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. #if defined X_HAVE_UTF8_STRING

  56.     XFontSet font_set;

  57. #endif

  58.     Font font;

  59.     XFontStruct *font_struct;

  60.     int font_offset;

  61.     Cursor pointer;

  62.     Atom wm_protocols;

  63.     Atom wm_delete_window;

  64. #if defined HAVE_X11_XKBLIB_H

  65.     Bool autorepeat;

  66. #endif

  67.     uint32_t max_char;

  68.     int cursor_flags;

  69.     int dirty_cursor_x, dirty_cursor_y;

  70. #if defined X_HAVE_UTF8_STRING

  71.     XIM im;

  72.     XIC ic;

  73. #endif

  74. };

  75. 

  76. #define UNICODE_XLFD_SUFFIX "-iso10646-1"

  77. #define LATIN_1_XLFD_SUFFIX "-iso8859-1"

  78. 

  79. static int x11_init_graphics(caca_display_t *dp)

  80. {

  81.     Colormap colormap;

  82.     XSetWindowAttributes x11_winattr;

  83. #if defined X_HAVE_UTF8_STRING

  84.     XVaNestedList list;

  85. #endif

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

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

  88.     char const *geometry;

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

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

  91.     int i;

  92. 

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

  94. 

  95. #if defined HAVE_GETENV

  96.     geometry = getenv("CACA_GEOMETRY");

  97.     if(geometry && *geometry)

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

  99. #endif

  100. 

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

  102.     dp->resize.allow = 1;

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

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

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

  106.     dp->resize.allow = 0;

  107. 

  108. #if defined HAVE_LOCALE_H

  109.     /* FIXME: some better code here would be:

  110.      * locale_t old_locale = uselocale(newlocale(LC_CTYPE_MASK,

  111.      *                                           "", (locale_t)0);

  112.      * … but XOpenDisplay only works properly with setlocale(),

  113.      * not uselocale(). */

  114.     char const *old_locale = setlocale(LC_CTYPE, "");

  115. #endif

  116. 

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

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

  119.         return -1;

  120. 

  121. #if defined HAVE_LOCALE_H

  122.     setlocale(LC_CTYPE, old_locale);

  123. #endif

  124. 

  125. #if defined HAVE_GETENV

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

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

  128.         parser = fonts;

  129.     else

  130. #endif

  131.         parser = fonts + 1;

  132. 

  133.     /* Ignore font errors */

  134.     old_error_handler = XSetErrorHandler(x11_error_handler);

  135. 

  136.     /* Parse our font list */

  137.     for( ; ; parser++)

  138.     {

  139. #if defined X_HAVE_UTF8_STRING

  140.         char **missing_charset_list;

  141.         char *def_string;

  142.         int missing_charset_count;

  143. #endif

  144.         uint32_t font_max_char;

  145. 

  146.         if(!*parser)

  147.         {

  148.             XSetErrorHandler(old_error_handler);

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

  150.             return -1;

  151.         }

  152. 

  153. #if defined X_HAVE_UTF8_STRING

  154.         dp->drv.p->font_set = XCreateFontSet(dp->drv.p->dpy, *parser,

  155.                                              &missing_charset_list,

  156.                                              &missing_charset_count,

  157.                                              &def_string);

  158.         if (missing_charset_list)

  159.             XFreeStringList(missing_charset_list);

  160. 

  161.         if (!dp->drv.p->font_set || missing_charset_count)

  162.         {

  163.             char buf[BUFSIZ];

  164. 

  165.             if (dp->drv.p->font_set)

  166.                 XFreeFontSet(dp->drv.p->dpy, dp->drv.p->font_set);

  167.             snprintf(buf, BUFSIZ - 1, "%s,*", *parser);

  168.             dp->drv.p->font_set = XCreateFontSet(dp->drv.p->dpy, buf,

  169.                                                  &missing_charset_list,

  170.                                                  &missing_charset_count,

  171.                                                  &def_string);

  172.             if (missing_charset_list)

  173.                 XFreeStringList(missing_charset_list);

  174.         }

  175. 

  176.         if (dp->drv.p->font_set)

  177.             break;

  178. #endif

  179. 

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

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

  182.             continue;

  183. 

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

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

  186.         {

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

  188.             continue;

  189.         }

  190. 

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

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

  193.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  197.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  199.         else

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

  201. 

  202.         font_max_char =

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

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

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

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

  207. 

  208.         break;

  209.     }

  210. 

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

  212.     XSetErrorHandler(old_error_handler);

  213. 

  214.     /* Set font width to the largest character in the set */

  215. #if defined X_HAVE_UTF8_STRING

  216.     if (dp->drv.p->font_set)

  217.     {

  218.         /* Do not trust the fontset, because some fonts may have

  219.          * irrelevantly large glyphs. Pango and rxvt use the same method. */

  220.         static wchar_t const test[] =

  221.         {

  222.             '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',

  223.             0x00cd, 0x00e7, 0x00d5, 0x0114, 0x0177, /* Í ç Õ Ĕ ŷ */

  224.             /* 0x0643, */ /* ﻙ */

  225.             0x304c, 0x672c, /* が本 */

  226.             0,

  227.         };

  228. 

  229.         XRectangle ink, logical;

  230. 

  231.         dp->drv.p->font_width =

  232.              (XmbTextEscapement(dp->drv.p->font_set, "CAca", 4) + 2) / 4;

  233.         XwcTextExtents(dp->drv.p->font_set, test, sizeof(test) / sizeof(*test),

  234.                        &ink, &logical);

  235.         dp->drv.p->font_height = ink.height;

  236.         dp->drv.p->font_offset = ink.height + ink.y;

  237.     }

  238.     else

  239. #endif

  240.     {

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

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

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

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

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

  246.         {

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

  248.             {

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

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

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

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

  253.             }

  254.         }

  255. 

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

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

  258. 

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

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

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

  262.     }

  263. 

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

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

  266.     {

  267.         XColor color;

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

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

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

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

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

  273.     }

  274. 

  275.     x11_winattr.backing_store = Always;

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

  277.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  278. 

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

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

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

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

  283.                       0, 0, InputOutput, 0,

  284.                       CWBackingStore | CWBackPixel | CWEventMask,

  285.                       &x11_winattr);

  286. 

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

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

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

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

  291. 

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

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

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

  295. 

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

  297. 

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

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

  300. 

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

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

  303. #if defined X_HAVE_UTF8_STRING

  304.     if (!dp->drv.p->font_set)

  305. #endif

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

  307. 

  308.     for(;;)

  309.     {

  310.         XEvent xevent;

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

  312.         if(xevent.type == MapNotify)

  313.             break;

  314.     }

  315. 

  316. #if defined HAVE_X11_XKBLIB_H

  317.     /* Disable autorepeat */

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

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

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

  321. #endif

  322. 

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

  324.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  325.           | ExposureMask;

  326. 

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

  328. 

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

  330. 

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

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

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

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

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

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

  337. 

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

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

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

  341. 

  342. #if defined X_HAVE_UTF8_STRING

  343.     list = XVaCreateNestedList(0, XNFontSet, dp->drv.p->font_set, NULL);

  344.     dp->drv.p->im = XOpenIM(dp->drv.p->dpy, NULL, NULL, NULL);

  345. 

  346.     if (dp->drv.p->im == NULL) {

  347.       fprintf(stderr, "x11 driver error: unable to open input method\n");

  348.       return -1;

  349.     }

  350. 

  351.     dp->drv.p->ic = XCreateIC(dp->drv.p->im,

  352.                           XNInputStyle, XIMPreeditNothing | XIMStatusNothing,

  353.                           XNClientWindow, dp->drv.p->window,

  354.                           XNPreeditAttributes, list,

  355.                           XNStatusAttributes, list,

  356.                           NULL);

  357. 

  358.     if (dp->drv.p->ic == NULL) {

  359.       fprintf(stderr, "x11 driver error: unable to create input context\n");

  360.       return -1;

  361.     }

  362. #endif

  363. 

  364.     return 0;

  365. }

  366. 

  367. static int x11_end_graphics(caca_display_t *dp)

  368. {

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

  370. #if defined HAVE_X11_XKBLIB_H

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

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

  373. #endif

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

  375. #if defined X_HAVE_UTF8_STRING

  376.     if (dp->drv.p->font_set)

  377.         XFreeFontSet(dp->drv.p->dpy, dp->drv.p->font_set);

  378.     else

  379. #endif

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

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

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

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

  384. #if defined X_HAVE_UTF8_STRING

  385.     XDestroyIC(dp->drv.p->ic);

  386.     XCloseIM(dp->drv.p->im);

  387. #endif

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

  389. 

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

  391. 

  392.     return 0;

  393. }

  394. 

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

  396. {

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

  398.     return 0;

  399. }

  400. 

  401. static int x11_get_display_width(caca_display_t const *dp)

  402. {

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

  404. }

  405. 

  406. static int x11_get_display_height(caca_display_t const *dp)

  407. {

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

  409. }

  410. 

  411. static void x11_display(caca_display_t *dp)

  412. {

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

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

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

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

  417.     int x, y, i, len;

  418. 

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

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

  421.     {

  422.         int dx, dy, dw, dh;

  423. 

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

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

  426.         if(i == -1)

  427.         {

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

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

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

  431.                 continue;

  432. 

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

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

  435.             dw = dh = 1;

  436. 

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

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

  439.         }

  440.         else

  441.         {

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

  443.         }

  444. 

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

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

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

  448.         {

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

  450.             {

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

  452.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  453. 

  454.                 len = 1;

  455.                 while(x + len < dx + dw

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

  457.                     len++;

  458. 

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

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

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

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

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

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

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

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

  467.             }

  468.         }

  469. 

  470.         /* Then print the foreground characters */

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

  472.         {

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

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

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

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

  477. 

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

  479.             {

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

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

  482. 

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

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

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

  486.                               *attrs, *chars);

  487.             }

  488.         }

  489.     }

  490. 

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

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

  493.     {

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

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

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

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

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

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

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

  501. 

  502.         /* Mark the area as dirty */

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

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

  505.     }

  506. 

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

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

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

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

  511.               0, 0);

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

  513. }

  514. 

  515. static void x11_handle_resize(caca_display_t *dp)

  516. {

  517.     Pixmap new_pixmap;

  518. 

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

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

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

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

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

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

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

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

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

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

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

  530. }

  531. 

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

  533. {

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

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

  536.     XEvent xevent;

  537.     char key;

  538. 

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

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

  541.     {

  542.         KeySym keysym;

  543. #if defined X_HAVE_UTF8_STRING

  544.         int len;

  545. #endif

  546. 

  547.         /* Expose event */

  548.         if(xevent.type == Expose)

  549.         {

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

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

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

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

  554.             continue;

  555.         }

  556. 

  557.         /* Resize event */

  558.         if(xevent.type == ConfigureNotify)

  559.         {

  560.             int w, h;

  561. 

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

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

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

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

  566. 

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

  568.                 continue;

  569. 

  570.             dp->resize.w = w;

  571.             dp->resize.h = h;

  572.             dp->resize.resized = 1;

  573. 

  574.             continue;

  575.         }

  576. 

  577.         /* Check for mouse motion events */

  578.         if(xevent.type == MotionNotify)

  579.         {

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

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

  582. 

  583.             if(newx >= width)

  584.                 newx = width - 1;

  585.             if(newy >= height)

  586.                 newy = height - 1;

  587. 

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

  589.                 continue;

  590. 

  591.             dp->mouse.x = newx;

  592.             dp->mouse.y = newy;

  593. 

  594.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  597.             return 1;

  598.         }

  599. 

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

  601.         if(xevent.type == ButtonPress)

  602.         {

  603.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  605.             return 1;

  606.         }

  607. 

  608.         if(xevent.type == ButtonRelease)

  609.         {

  610.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  612.             return 1;

  613.         }

  614. 

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

  616.         if(xevent.type == KeyPress)

  617.             ev->type = CACA_EVENT_KEY_PRESS;

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

  619.             ev->type = CACA_EVENT_KEY_RELEASE;

  620.         else

  621.             continue;

  622. 

  623.         if(XFilterEvent(&xevent, None) == True)

  624.             continue;

  625. 

  626. #if defined X_HAVE_UTF8_STRING

  627.         len = Xutf8LookupString(dp->drv.p->ic, &xevent.xkey,

  628.                                 ev->data.key.utf8, 8, NULL, NULL);

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

  630.         if (len)

  631.         {

  632.             ev->data.key.utf32 = caca_utf8_to_utf32(ev->data.key.utf8, NULL);

  633.             if(ev->data.key.utf32 <= 0xff)

  634.                 ev->data.key.ch = ev->data.key.utf32;

  635.             else

  636.                 ev->data.key.ch = 0;

  637.             return 1;

  638.         }

  639. #endif

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

  641.         {

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

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

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

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

  646.             return 1;

  647.         }

  648. 

  649.         keysym = XLookupKeysym(&xevent.xkey, 0);

  650.         switch(keysym)

  651.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  671.             case XK_KP_Page_Up:

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

  673.             case XK_KP_Page_Down:

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

  675.             case XK_KP_Home:

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

  677.             case XK_KP_End:

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

  679. 

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

  681.         }

  682. 

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

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

  685.         return 1;

  686.     }

  687. 

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

  689.     {

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

  691.             continue;

  692. 

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

  694.         {

  695.             ev->type = CACA_EVENT_QUIT;

  696.             return 1;

  697.         }

  698.     }

  699. 

  700.     ev->type = CACA_EVENT_NONE;

  701.     return 0;

  702. }

  703. 

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

  705. {

  706.     Cursor no_ptr;

  707.     Pixmap bm_no;

  708.     XColor black, dummy;

  709.     Colormap colormap;

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

  711. 

  712.     if(flags)

  713.     {

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

  715.         return;

  716.     }

  717. 

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

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

  720.     {

  721.         return;

  722.     }

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

  724.                                   empty, 8, 8);

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

  726.                                  &black, &black, 0, 0);

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

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

  729.     if(bm_no != None)

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

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

  732. 

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

  734. }

  735. 

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

  737. {

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

  739. }

  740. 

  741. /*

  742.  * XXX: following functions are local

  743.  */

  744. 

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

  746. {

  747.     /* Ignore the error */

  748.     return 0;

  749. }

  750. 

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

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

  753. {

  754.     static uint8_t const udlr[] =

  755.     {

  756.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  757.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  758.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  759.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  760.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  761.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  762.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  763.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  764.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  765.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  766.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  767.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  768.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  769.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  770.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  771.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  772.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  773.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  774.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  775.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  776.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  777.     };

  778. 

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

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

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

  782.     int fw;

  783. 

  784.     /* Underline */

  785.     if(attr & CACA_UNDERLINE)

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

  787. 

  788.     /* Skip spaces and magic stuff */

  789.     if(ch <= 0x00000020)

  790.         return;

  791. 

  792.     if(ch == CACA_MAGIC_FULLWIDTH)

  793.         return;

  794. 

  795.     fw = w;

  796.     if(caca_utf32_is_fullwidth(ch))

  797.         fw *= 2;

  798. 

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

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

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

  802. 

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

  804.     {

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

  806. 

  807.         if(D & 0x04)

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

  809. 

  810.         if(D & 0x01)

  811.             XFillRectangle(dpy, px, gc,

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

  813. 

  814.         if(D & 0x40)

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

  816. 

  817.         if(D & 0x10)

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

  819. 

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

  821. 

  822.         if(D & 0x08)

  823.         {

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

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

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

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

  828.         }

  829. 

  830.         if(D & 0x02)

  831.         {

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

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

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

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

  836.         }

  837. 

  838.         if(D & 0x80)

  839.         {

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

  841.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  843.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  844.         }

  845. 

  846.         if(D & 0x20)

  847.         {

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

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

  850.                            1, (h + 1) / 2 + STEPIF(0x0c,0x02));

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

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

  853.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  854.         }

  855. 

  856.         return;

  857.     }

  858. 

  859.     switch(ch)

  860.     {

  861.         case 0x000000b7: /* · */

  862.         case 0x00002219: /* ∙ */

  863.         case 0x000030fb: /* ・ */

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

  865.             return;

  866. 

  867.         case 0x00002261: /* ≡ */

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

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

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

  871.             return;

  872. 

  873.         case 0x00002580: /* ▀ */

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

  875.             return;

  876. 

  877.         case 0x00002584: /* ▄ */

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

  879.             return;

  880. 

  881.         case 0x00002588: /* █ */

  882.         case 0x000025ae: /* ▮ */

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

  884.             return;

  885. 

  886.         case 0x0000258c: /* ▌ */

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

  888.             return;

  889. 

  890.         case 0x00002590: /* ▐ */

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

  892.             return;

  893. 

  894.         case 0x000025a0: /* ■ */

  895.         case 0x000025ac: /* ▬ */

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

  897.             return;

  898. 

  899.         case 0x00002593: /* ▓ */

  900.         case 0x00002592: /* ▒ */

  901.         case 0x00002591: /* ░ */

  902.         {

  903.             /* FIXME: this sucks utterly */

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

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

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

  907.             {

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

  909.                     continue;

  910. 

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

  912.             }

  913.             return;

  914.         }

  915. 

  916.         case 0x000025cb: /* ○ */

  917.         case 0x00002022: /* • */

  918.         case 0x000025cf: /* ● */

  919.         {

  920.             int d, xo, yo;

  921. 

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

  923.             if(h < fw)

  924.                 d = h;

  925.             if(d < 1)

  926.                 d = 1;

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

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

  929.             if(ch == 0x000025cb)

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

  931.             else

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

  933.             return;

  934.         }

  935.     }

  936. 

  937. #if defined X_HAVE_UTF8_STRING

  938.     if (dp->drv.p->font_set)

  939.     {

  940.         wchar_t wch = ch;

  941.         XwcDrawString(dpy, px, dp->drv.p->font_set, gc, x, yoff, &wch, 1);

  942.     }

  943.     else

  944. #endif

  945.     {

  946.         XChar2b ch16;

  947. 

  948. #if !defined X_HAVE_UTF8_STRING

  949.         if(ch > dp->drv.p->max_char)

  950.         {

  951.             ch16.byte1 = 0;

  952.             ch16.byte2 = caca_utf32_to_ascii(ch);

  953.         }

  954.         else

  955. #endif

  956.         {

  957.             ch16.byte1 = (uint8_t)(ch >> 8);

  958.             ch16.byte2 = (uint8_t)ch;

  959.         }

  960. 

  961.         XDrawString16(dpy, px, gc, x, yoff, &ch16, 1);

  962.     }

  963. }

  964. 

  965. /*

  966.  * Driver initialisation

  967.  */

  968. 

  969. int x11_install(caca_display_t *dp)

  970. {

  971. #if defined HAVE_GETENV

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

  973.         return -1;

  974. #endif

  975. 

  976.     dp->drv.id = CACA_DRIVER_X11;

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

  978. 

  979.     dp->drv.init_graphics = x11_init_graphics;

  980.     dp->drv.end_graphics = x11_end_graphics;

  981.     dp->drv.set_display_title = x11_set_display_title;

  982.     dp->drv.get_display_width = x11_get_display_width;

  983.     dp->drv.get_display_height = x11_get_display_height;

  984.     dp->drv.display = x11_display;

  985.     dp->drv.handle_resize = x11_handle_resize;

  986.     dp->drv.get_event = x11_get_event;

  987.     dp->drv.set_mouse = x11_set_mouse;

  988.     dp->drv.set_cursor = x11_set_cursor;

  989. 

  990.     return 0;

  991. }

  992. 

  993. #endif /* USE_X11 */