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libcaca/caca/driver/x11.c

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  1. /*

  2.  *  libcaca       Colour ASCII-Art library

  3.  *  Copyright (c) 2002-2015 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.     setlocale(LC_ALL, "");

  110. #endif

  111. 

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

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

  114.         return -1;

  115. 

  116. #if defined HAVE_GETENV

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

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

  119.         parser = fonts;

  120.     else

  121. #endif

  122.         parser = fonts + 1;

  123. 

  124.     /* Ignore font errors */

  125.     old_error_handler = XSetErrorHandler(x11_error_handler);

  126. 

  127.     /* Parse our font list */

  128.     for( ; ; parser++)

  129.     {

  130. #if defined X_HAVE_UTF8_STRING

  131.         char **missing_charset_list;

  132.         char *def_string;

  133.         int missing_charset_count;

  134. #endif

  135.         uint32_t font_max_char;

  136. 

  137.         if(!*parser)

  138.         {

  139.             XSetErrorHandler(old_error_handler);

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

  141.             return -1;

  142.         }

  143. 

  144. #if defined X_HAVE_UTF8_STRING

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

  146.                                              &missing_charset_list,

  147.                                              &missing_charset_count,

  148.                                              &def_string);

  149.         if (missing_charset_list)

  150.             XFreeStringList(missing_charset_list);

  151. 

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

  153.         {

  154.             char buf[BUFSIZ];

  155. 

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

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

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

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

  160.                                                  &missing_charset_list,

  161.                                                  &missing_charset_count,

  162.                                                  &def_string);

  163.             if (missing_charset_list)

  164.                 XFreeStringList(missing_charset_list);

  165.         }

  166. 

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

  168.             break;

  169. #endif

  170. 

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

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

  173.             continue;

  174. 

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

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

  177.         {

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

  179.             continue;

  180.         }

  181. 

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

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

  184.                           - strlen(UNICODE_XLFD_SUFFIX), UNICODE_XLFD_SUFFIX))

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

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

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

  188.                         - strlen(LATIN_1_XLFD_SUFFIX), LATIN_1_XLFD_SUFFIX))

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

  190.         else

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

  192. 

  193.         font_max_char =

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

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

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

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

  198. 

  199.         break;

  200.     }

  201. 

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

  203.     XSetErrorHandler(old_error_handler);

  204. 

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

  206. #if defined X_HAVE_UTF8_STRING

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

  208.     {

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

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

  211.         static wchar_t const test[] =

  212.         {

  213.             '0', '1', '8', 'a', 'd', 'x', 'm', 'y', 'g', 'W', 'X', '\'', '_',

  214.             0x00cd, 0x00e7, 0x00d5, 0x0114, 0x0177, /* Í ç Õ Ĕ ŷ */

  215.             /* 0x0643, */ /* ﻙ */

  216.             0x304c, 0x672c, /* が本 */

  217.             0,

  218.         };

  219. 

  220.         XRectangle ink, logical;

  221. 

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

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

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

  225.                        &ink, &logical);

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

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

  228.     }

  229.     else

  230. #endif

  231.     {

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

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

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

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

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

  237.         {

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

  239.             {

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

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

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

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

  244.             }

  245.         }

  246. 

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

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

  249. 

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

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

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

  253.     }

  254. 

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

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

  257.     {

  258.         XColor color;

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

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

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

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

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

  264.     }

  265. 

  266.     x11_winattr.backing_store = Always;

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

  268.     x11_winattr.event_mask = ExposureMask | StructureNotifyMask;

  269. 

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

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

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

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

  274.                       0, 0, InputOutput, 0,

  275.                       CWBackingStore | CWBackPixel | CWEventMask,

  276.                       &x11_winattr);

  277. 

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

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

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

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

  282. 

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

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

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

  286. 

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

  288. 

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

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

  291. 

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

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

  294. #if defined X_HAVE_UTF8_STRING

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

  296. #endif

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

  298. 

  299.     for(;;)

  300.     {

  301.         XEvent xevent;

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

  303.         if(xevent.type == MapNotify)

  304.             break;

  305.     }

  306. 

  307. #if defined HAVE_X11_XKBLIB_H

  308.     /* Disable autorepeat */

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

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

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

  312. #endif

  313. 

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

  315.           | ButtonReleaseMask | PointerMotionMask | StructureNotifyMask

  316.           | ExposureMask;

  317. 

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

  319. 

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

  321. 

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

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

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

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

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

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

  328. 

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

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

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

  332. 

  333. #if defined X_HAVE_UTF8_STRING

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

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

  336. 

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

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

  339.       return -1;

  340.     }

  341. 

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

  343.                           XNInputStyle, XIMPreeditNothing | XIMStatusNothing,

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

  345.                           XNPreeditAttributes, list,

  346.                           XNStatusAttributes, list,

  347.                           NULL);

  348. 

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

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

  351.       return -1;

  352.     }

  353. #endif

  354. 

  355.     return 0;

  356. }

  357. 

  358. static int x11_end_graphics(caca_display_t *dp)

  359. {

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

  361. #if defined HAVE_X11_XKBLIB_H

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

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

  364. #endif

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

  366. #if defined X_HAVE_UTF8_STRING

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

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

  369.     else

  370. #endif

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

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

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

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

  375. #if defined X_HAVE_UTF8_STRING

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

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

  378. #endif

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

  380. 

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

  382. 

  383.     return 0;

  384. }

  385. 

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

  387. {

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

  389.     return 0;

  390. }

  391. 

  392. static int x11_get_display_width(caca_display_t const *dp)

  393. {

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

  395. }

  396. 

  397. static int x11_get_display_height(caca_display_t const *dp)

  398. {

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

  400. }

  401. 

  402. static void x11_display(caca_display_t *dp)

  403. {

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

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

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

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

  408.     int x, y, i, len;

  409. 

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

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

  412.     {

  413.         int dx, dy, dw, dh;

  414. 

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

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

  417.         if(i == -1)

  418.         {

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

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

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

  422.                 continue;

  423. 

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

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

  426.             dw = dh = 1;

  427. 

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

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

  430.         }

  431.         else

  432.         {

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

  434.         }

  435. 

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

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

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

  439.         {

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

  441.             {

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

  443.                 uint16_t bg = caca_attr_to_rgb12_bg(*attrs);

  444. 

  445.                 len = 1;

  446.                 while(x + len < dx + dw

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

  448.                     len++;

  449. 

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

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

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

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

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

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

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

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

  458.             }

  459.         }

  460. 

  461.         /* Then print the foreground characters */

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

  463.         {

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

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

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

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

  468. 

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

  470.             {

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

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

  473. 

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

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

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

  477.                               *attrs, *chars);

  478.             }

  479.         }

  480.     }

  481. 

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

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

  484.     {

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

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

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

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

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

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

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

  492. 

  493.         /* Mark the area as dirty */

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

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

  496.     }

  497. 

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

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

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

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

  502.               0, 0);

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

  504. }

  505. 

  506. static void x11_handle_resize(caca_display_t *dp)

  507. {

  508.     Pixmap new_pixmap;

  509. 

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

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

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

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

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

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

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

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

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

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

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

  521. }

  522. 

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

  524. {

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

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

  527.     XEvent xevent;

  528.     char key;

  529. 

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

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

  532.     {

  533.         KeySym keysym;

  534. #if defined X_HAVE_UTF8_STRING

  535.         int len;

  536. #endif

  537. 

  538.         /* Expose event */

  539.         if(xevent.type == Expose)

  540.         {

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

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

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

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

  545.             continue;

  546.         }

  547. 

  548.         /* Resize event */

  549.         if(xevent.type == ConfigureNotify)

  550.         {

  551.             int w, h;

  552. 

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

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

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

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

  557. 

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

  559.                 continue;

  560. 

  561.             dp->resize.w = w;

  562.             dp->resize.h = h;

  563.             dp->resize.resized = 1;

  564. 

  565.             continue;

  566.         }

  567. 

  568.         /* Check for mouse motion events */

  569.         if(xevent.type == MotionNotify)

  570.         {

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

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

  573. 

  574.             if(newx >= width)

  575.                 newx = width - 1;

  576.             if(newy >= height)

  577.                 newy = height - 1;

  578. 

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

  580.                 continue;

  581. 

  582.             dp->mouse.x = newx;

  583.             dp->mouse.y = newy;

  584. 

  585.             ev->type = CACA_EVENT_MOUSE_MOTION;

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

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

  588.             return 1;

  589.         }

  590. 

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

  592.         if(xevent.type == ButtonPress)

  593.         {

  594.             ev->type = CACA_EVENT_MOUSE_PRESS;

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

  596.             return 1;

  597.         }

  598. 

  599.         if(xevent.type == ButtonRelease)

  600.         {

  601.             ev->type = CACA_EVENT_MOUSE_RELEASE;

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

  603.             return 1;

  604.         }

  605. 

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

  607.         if(xevent.type == KeyPress)

  608.             ev->type = CACA_EVENT_KEY_PRESS;

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

  610.             ev->type = CACA_EVENT_KEY_RELEASE;

  611.         else

  612.             continue;

  613. 

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

  615.             continue;

  616. 

  617. #if defined X_HAVE_UTF8_STRING

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

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

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

  621.         if (len)

  622.         {

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

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

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

  626.             else

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

  628.             return 1;

  629.         }

  630. #endif

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

  632.         {

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

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

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

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

  637.             return 1;

  638.         }

  639. 

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

  641.         switch(keysym)

  642.         {

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  662.             case XK_KP_Page_Up:

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

  664.             case XK_KP_Page_Down:

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

  666.             case XK_KP_Home:

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

  668.             case XK_KP_End:

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

  670. 

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

  672.         }

  673. 

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

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

  676.         return 1;

  677.     }

  678. 

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

  680.     {

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

  682.             continue;

  683. 

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

  685.         {

  686.             ev->type = CACA_EVENT_QUIT;

  687.             return 1;

  688.         }

  689.     }

  690. 

  691.     ev->type = CACA_EVENT_NONE;

  692.     return 0;

  693. }

  694. 

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

  696. {

  697.     Cursor no_ptr;

  698.     Pixmap bm_no;

  699.     XColor black, dummy;

  700.     Colormap colormap;

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

  702. 

  703.     if(flags)

  704.     {

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

  706.         return;

  707.     }

  708. 

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

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

  711.     {

  712.         return;

  713.     }

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

  715.                                   empty, 8, 8);

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

  717.                                  &black, &black, 0, 0);

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

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

  720.     if(bm_no != None)

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

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

  723. 

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

  725. }

  726. 

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

  728. {

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

  730. }

  731. 

  732. /*

  733.  * XXX: following functions are local

  734.  */

  735. 

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

  737. {

  738.     /* Ignore the error */

  739.     return 0;

  740. }

  741. 

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

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

  744. {

  745.     static uint8_t const udlr[] =

  746.     {

  747.         /* 0x2500 - 0x250f: ─ . │ . . . . . . . . . ┌ . . . */

  748.         0x05, 0x00, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00,

  749.         0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00,

  750.         /* 0x2510 - 0x251f: ┐ . . . └ . . . ┘ . . . ├ . . . */

  751.         0x14, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, 0x00,

  752.         0x44, 0x00, 0x00, 0x00, 0x51, 0x00, 0x00, 0x00,

  753.         /* 0x2520 - 0x252f: . . . . ┤ . . . . . . . ┬ . . . */

  754.         0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00,

  755.         0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x00,

  756.         /* 0x2530 - 0x253f: . . . . ┴ . . . . . . . ┼ . . . */

  757.         0x00, 0x00, 0x00, 0x00, 0x45, 0x00, 0x00, 0x00,

  758.         0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00,

  759.         /* 0x2540 - 0x254f: . . . . . . . . . . . . . . . . */

  760.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  761.         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

  762.         /* 0x2550 - 0x255f: ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ */

  763.         0x0a, 0xa0, 0x12, 0x21, 0x22, 0x18, 0x24, 0x28,

  764.         0x42, 0x81, 0x82, 0x48, 0x84, 0x88, 0x52, 0xa1,

  765.         /* 0x2560 - 0x256c: ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ */

  766.         0xa2, 0x58, 0xa4, 0xa8, 0x1a, 0x25, 0x2a, 0x4a,

  767.         0x85, 0x8a, 0x5a, 0xa5, 0xaa,

  768.     };

  769. 

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

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

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

  773.     int fw;

  774. 

  775.     /* Underline */

  776.     if(attr & CACA_UNDERLINE)

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

  778. 

  779.     /* Skip spaces and magic stuff */

  780.     if(ch <= 0x00000020)

  781.         return;

  782. 

  783.     if(ch == CACA_MAGIC_FULLWIDTH)

  784.         return;

  785. 

  786.     fw = w;

  787.     if(caca_utf32_is_fullwidth(ch))

  788.         fw *= 2;

  789. 

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

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

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

  793. 

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

  795.     {

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

  797. 

  798.         if(D & 0x04)

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

  800. 

  801.         if(D & 0x01)

  802.             XFillRectangle(dpy, px, gc,

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

  804. 

  805.         if(D & 0x40)

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

  807. 

  808.         if(D & 0x10)

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

  810. 

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

  812. 

  813.         if(D & 0x08)

  814.         {

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

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

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

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

  819.         }

  820. 

  821.         if(D & 0x02)

  822.         {

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

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

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

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

  827.         }

  828. 

  829.         if(D & 0x80)

  830.         {

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

  832.                            1, h / 2 + 1 + STEPIF(0x0c,0x02));

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

  834.                            1, h / 2 + 1 + STEPIF(0x03,0x08));

  835.         }

  836. 

  837.         if(D & 0x20)

  838.         {

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

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

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

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

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

  844.                            1, (h + 1) / 2 + STEPIF(0x03,0x08));

  845.         }

  846. 

  847.         return;

  848.     }

  849. 

  850.     switch(ch)

  851.     {

  852.         case 0x000000b7: /* · */

  853.         case 0x00002219: /* ∙ */

  854.         case 0x000030fb: /* ・ */

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

  856.             return;

  857. 

  858.         case 0x00002261: /* ≡ */

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

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

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

  862.             return;

  863. 

  864.         case 0x00002580: /* ▀ */

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

  866.             return;

  867. 

  868.         case 0x00002584: /* ▄ */

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

  870.             return;

  871. 

  872.         case 0x00002588: /* █ */

  873.         case 0x000025ae: /* ▮ */

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

  875.             return;

  876. 

  877.         case 0x0000258c: /* ▌ */

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

  879.             return;

  880. 

  881.         case 0x00002590: /* ▐ */

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

  883.             return;

  884. 

  885.         case 0x000025a0: /* ■ */

  886.         case 0x000025ac: /* ▬ */

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

  888.             return;

  889. 

  890.         case 0x00002593: /* ▓ */

  891.         case 0x00002592: /* ▒ */

  892.         case 0x00002591: /* ░ */

  893.         {

  894.             /* FIXME: this sucks utterly */

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

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

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

  898.             {

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

  900.                     continue;

  901. 

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

  903.             }

  904.             return;

  905.         }

  906. 

  907.         case 0x000025cb: /* ○ */

  908.         case 0x00002022: /* • */

  909.         case 0x000025cf: /* ● */

  910.         {

  911.             int d, xo, yo;

  912. 

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

  914.             if(h < fw)

  915.                 d = h;

  916.             if(d < 1)

  917.                 d = 1;

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

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

  920.             if(ch == 0x000025cb)

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

  922.             else

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

  924.             return;

  925.         }

  926.     }

  927. 

  928. #if defined X_HAVE_UTF8_STRING

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

  930.     {

  931.         wchar_t wch = ch;

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

  933.     }

  934.     else

  935. #endif

  936.     {

  937.         XChar2b ch16;

  938. 

  939. #if !defined X_HAVE_UTF8_STRING

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

  941.         {

  942.             ch16.byte1 = 0;

  943.             ch16.byte2 = caca_utf32_to_ascii(ch);

  944.         }

  945.         else

  946. #endif

  947.         {

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

  949.             ch16.byte2 = (uint8_t)ch;

  950.         }

  951. 

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

  953.     }

  954. }

  955. 

  956. /*

  957.  * Driver initialisation

  958.  */

  959. 

  960. int x11_install(caca_display_t *dp)

  961. {

  962. #if defined HAVE_GETENV

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

  964.         return -1;

  965. #endif

  966. 

  967.     dp->drv.id = CACA_DRIVER_X11;

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

  969. 

  970.     dp->drv.init_graphics = x11_init_graphics;

  971.     dp->drv.end_graphics = x11_end_graphics;

  972.     dp->drv.set_display_title = x11_set_display_title;

  973.     dp->drv.get_display_width = x11_get_display_width;

  974.     dp->drv.get_display_height = x11_get_display_height;

  975.     dp->drv.display = x11_display;

  976.     dp->drv.handle_resize = x11_handle_resize;

  977.     dp->drv.get_event = x11_get_event;

  978.     dp->drv.set_mouse = x11_set_mouse;

  979.     dp->drv.set_cursor = x11_set_cursor;

  980. 

  981.     return 0;

  982. }

  983. 

  984. #endif /* USE_X11 */