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IABSD.fr/xenocara/lib/libXcursor/src/display.c
matthieu
- lib/libXcursor/src/display.c
-
/* * Copyright © 2002 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of Keith Packard not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. Keith Packard makes no * representations about the suitability of this software for any purpose. It * is provided "as is" without express or implied warranty. * * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ #include "xcursorint.h" #include <X11/Xlibint.h> #include <ctype.h> static XcursorDisplayInfo *_XcursorDisplayInfo; static void _XcursorFreeDisplayInfo (XcursorDisplayInfo *info) { if (info->theme) free (info->theme); if (info->theme_from_config) free (info->theme_from_config); free (info); } static int _XcursorCloseDisplay (Display *dpy, XExtCodes *codes) { XcursorDisplayInfo *info, **prev; /* * Unhook from the global list */ _XLockMutex (_Xglobal_lock); for (prev = &_XcursorDisplayInfo; (info = *prev); prev = &(*prev)->next) if (info->display == dpy) { *prev = info->next; break; } _XUnlockMutex (_Xglobal_lock); if (info) _XcursorFreeDisplayInfo (info); return 0; } static int _XcursorDefaultParseBool (char *v) { char c0, c1; c0 = *v; if (isupper ((int)c0)) c0 = tolower (c0); if (c0 == 't' || c0 == 'y' || c0 == '1') return 1; if (c0 == 'f' || c0 == 'n' || c0 == '0') return 0; if (c0 == 'o') { c1 = v[1]; if (isupper ((int)c1)) c1 = tolower (c1); if (c1 == 'n') return 1; if (c1 == 'f') return 0; } return -1; } XcursorDisplayInfo * _XcursorGetDisplayInfo (Display *dpy) { XcursorDisplayInfo *info, **prev, *old; int event_base, error_base; int major, minor; char *v; int i; _XLockMutex (_Xglobal_lock); for (prev = &_XcursorDisplayInfo; (info = *prev); prev = &(*prev)->next) { if (info->display == dpy) { /* * MRU the list */ if (prev != &_XcursorDisplayInfo) { *prev = info->next; info->next = _XcursorDisplayInfo; _XcursorDisplayInfo = info; } break; } } _XUnlockMutex (_Xglobal_lock); if (info) return info; info = (XcursorDisplayInfo *) malloc (sizeof (XcursorDisplayInfo)); if (!info) return NULL; info->next = NULL; info->display = dpy; info->codes = XAddExtension (dpy); if (!info->codes) { free (info); return NULL; } (void) XESetCloseDisplay (dpy, info->codes->extension, _XcursorCloseDisplay); /* * Check whether the display supports the Render CreateCursor request */ info->has_render_cursor = XcursorFalse; info->has_anim_cursor = XcursorFalse; if (XRenderQueryExtension (dpy, &event_base, &error_base) && XRenderQueryVersion (dpy, &major, &minor)) { if (major > 0 || minor >= 5) { info->has_render_cursor = XcursorTrue; v = getenv ("XCURSOR_CORE"); if (!v) v = XGetDefault (dpy, "Xcursor", "core"); if (v && _XcursorDefaultParseBool (v) == 1) info->has_render_cursor = XcursorFalse; } if (info->has_render_cursor && (major > 0 || minor >= 8)) { info->has_anim_cursor = XcursorTrue; v = getenv ("XCURSOR_ANIM"); if (!v) v = XGetDefault (dpy, "Xcursor", "anim"); if (v && _XcursorDefaultParseBool (v) == 0) info->has_anim_cursor = XcursorFalse; } } info->size = 0; /* * Get desired cursor size */ v = getenv ("XCURSOR_SIZE"); if (!v) v = XGetDefault (dpy, "Xcursor", "size"); if (v) info->size = atoi (v); /* * Use the Xft size to guess a size; make cursors 16 "points" tall */ if (info->size == 0) { int dpi = 0; v = XGetDefault (dpy, "Xft", "dpi"); if (v) dpi = atoi (v); if (dpi) info->size = dpi * 16 / 72; } /* * Use display size to guess a size */ if (info->size == 0) { int dim; if (DisplayHeight (dpy, DefaultScreen (dpy)) < DisplayWidth (dpy, DefaultScreen (dpy))) dim = DisplayHeight (dpy, DefaultScreen (dpy)); else dim = DisplayWidth (dpy, DefaultScreen (dpy)); /* * 16 pixels on a display of dimension 768 */ info->size = dim / 48; } info->theme = NULL; info->theme_from_config = NULL; /* * Get the desired theme */ v = getenv ("XCURSOR_THEME"); if (!v) v = XGetDefault (dpy, "Xcursor", "theme"); if (v) { int len; len = strlen (v) + 1; info->theme = malloc (len); if (info->theme) strcpy (info->theme, v); info->theme_from_config = malloc (len); if (info->theme_from_config) strcpy (info->theme_from_config, v); } /* * Get the desired dither */ info->dither = XcursorDitherThreshold; v = getenv ("XCURSOR_DITHER"); if (!v) v = XGetDefault (dpy, "Xcursor", "dither"); if (v) { if (!strcmp (v, "threshold")) info->dither = XcursorDitherThreshold; if (!strcmp (v, "median")) info->dither = XcursorDitherMedian; if (!strcmp (v, "ordered")) info->dither = XcursorDitherOrdered; if (!strcmp (v, "diffuse")) info->dither = XcursorDitherDiffuse; } info->theme_core = False; /* * Find out if core cursors should * be themed */ v = getenv ("XCURSOR_THEME_CORE"); if (!v) v = XGetDefault (dpy, "Xcursor", "theme_core"); if (v) { i = _XcursorDefaultParseBool (v); if (i >= 0) info->theme_core = i; } info->fonts = NULL; for (i = 0; i < NUM_BITMAPS; i++) info->bitmaps[i].bitmap = None; /* * Link new info info list, making sure another * thread hasn't inserted something into the list while * this one was busy setting up the data */ _XLockMutex (_Xglobal_lock); for (old = _XcursorDisplayInfo; old; old = old->next) if (old->display == dpy) break; if (old) { _XcursorFreeDisplayInfo (info); info = old; } else { info->next = _XcursorDisplayInfo; _XcursorDisplayInfo = info; } _XUnlockMutex (_Xglobal_lock); return info; } XcursorBool XcursorSupportsARGB (Display *dpy) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); return info && info->has_render_cursor; } XcursorBool XcursorSupportsAnim (Display *dpy) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); return info && info->has_anim_cursor; } XcursorBool XcursorSetDefaultSize (Display *dpy, int size) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); if (!info) return XcursorFalse; info->size = size; return XcursorTrue; } int XcursorGetDefaultSize (Display *dpy) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); if (!info) return 0; return info->size; } XcursorBool XcursorSetTheme (Display *dpy, const char *theme) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); char *copy; if (!info) return XcursorFalse; if (!theme) theme = info->theme_from_config; if (theme) { copy = malloc (strlen (theme) + 1); if (!copy) return XcursorFalse; strcpy (copy, theme); } else copy = NULL; if (info->theme) free (info->theme); info->theme = copy; return XcursorTrue; } char * XcursorGetTheme (Display *dpy) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); if (!info) return NULL; return info->theme; } XcursorBool XcursorGetThemeCore (Display *dpy) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); if (!info) return XcursorFalse; return info->theme_core; } XcursorBool XcursorSetThemeCore (Display *dpy, XcursorBool theme_core) { XcursorDisplayInfo *info = _XcursorGetDisplayInfo (dpy); if (!info) return XcursorFalse; info->theme_core = theme_core; return XcursorTrue; }