forked from AuroraMiddleware/gtk
914 lines
24 KiB
C
914 lines
24 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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/* needs to be first because any header might include gdk-pixbuf.h otherwise */
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#define GDK_PIXBUF_ENABLE_BACKEND
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "gdkcursor.h"
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#include "gdkcursorprivate.h"
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#include "gdkprivate-x11.h"
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#include "gdkdisplay-x11.h"
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#include <X11/Xlib.h>
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#include <X11/cursorfont.h>
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#ifdef HAVE_XCURSOR
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#include <X11/Xcursor/Xcursor.h>
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#endif
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#ifdef HAVE_XFIXES
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#include <X11/extensions/Xfixes.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <math.h>
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struct _GdkX11Cursor
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{
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GdkCursor cursor;
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Cursor xcursor;
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gchar *name;
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guint serial;
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};
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struct _GdkX11CursorClass
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{
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GdkCursorClass cursor_class;
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};
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static guint theme_serial = 0;
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/* cursor_cache holds a cache of non-pixmap cursors to avoid expensive
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* libXcursor searches, cursors are added to it but only removed when
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* their display is closed. We make the assumption that since there are
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* a small number of display’s and a small number of cursor’s that this
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* list will stay small enough not to be a problem.
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*/
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static GSList* cursor_cache = NULL;
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struct cursor_cache_key
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{
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GdkDisplay* display;
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GdkCursorType type;
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const char* name;
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};
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/* Caller should check if there is already a match first.
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* Cursor MUST be either a typed cursor or a pixmap with
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* a non-NULL name.
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*/
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static void
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add_to_cache (GdkX11Cursor* cursor)
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{
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cursor_cache = g_slist_prepend (cursor_cache, cursor);
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/* Take a ref so that if the caller frees it we still have it */
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g_object_ref (cursor);
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}
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/* Returns 0 on a match
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*/
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static gint
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cache_compare_func (gconstpointer listelem,
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gconstpointer target)
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{
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GdkX11Cursor* cursor = (GdkX11Cursor*)listelem;
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struct cursor_cache_key* key = (struct cursor_cache_key*)target;
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if ((cursor->cursor.type != key->type) ||
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(gdk_cursor_get_display (GDK_CURSOR (cursor)) != key->display))
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return 1; /* No match */
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/* Elements marked as pixmap must be named cursors
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* (since we don't store normal pixmap cursors
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*/
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if (key->type == GDK_CURSOR_IS_PIXMAP)
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return strcmp (key->name, cursor->name);
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return 0; /* Match */
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}
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/* Returns the cursor if there is a match, NULL if not
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* For named cursors type shall be GDK_CURSOR_IS_PIXMAP
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* For unnamed, typed cursors, name shall be NULL
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*/
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static GdkX11Cursor*
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find_in_cache (GdkDisplay *display,
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GdkCursorType type,
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const char *name)
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{
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GSList* res;
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struct cursor_cache_key key;
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key.display = display;
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key.type = type;
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key.name = name;
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res = g_slist_find_custom (cursor_cache, &key, cache_compare_func);
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if (res)
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return (GdkX11Cursor *) res->data;
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return NULL;
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}
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/* Called by gdk_x11_display_finalize to flush any cached cursors
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* for a dead display.
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*/
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void
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_gdk_x11_cursor_display_finalize (GdkDisplay *display)
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{
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GSList* item;
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GSList** itemp; /* Pointer to the thing to fix when we delete an item */
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item = cursor_cache;
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itemp = &cursor_cache;
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while (item)
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{
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GdkX11Cursor* cursor = (GdkX11Cursor*)(item->data);
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if (gdk_cursor_get_display (GDK_CURSOR (cursor)) == display)
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{
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GSList* olditem;
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g_object_unref ((GdkCursor*) cursor);
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/* Remove this item from the list */
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*(itemp) = item->next;
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olditem = item;
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item = item->next;
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g_slist_free_1 (olditem);
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}
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else
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{
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itemp = &(item->next);
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item = item->next;
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}
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}
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}
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/*** GdkX11Cursor ***/
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G_DEFINE_TYPE (GdkX11Cursor, gdk_x11_cursor, GDK_TYPE_CURSOR)
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static cairo_surface_t *gdk_x11_cursor_get_surface (GdkCursor *cursor,
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gdouble *x_hot,
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gdouble *y_hot);
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static void
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gdk_x11_cursor_finalize (GObject *object)
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{
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GdkX11Cursor *private = GDK_X11_CURSOR (object);
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GdkDisplay *display;
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display = gdk_cursor_get_display (GDK_CURSOR (object));
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if (private->xcursor && !gdk_display_is_closed (display))
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XFreeCursor (GDK_DISPLAY_XDISPLAY (display), private->xcursor);
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g_free (private->name);
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G_OBJECT_CLASS (gdk_x11_cursor_parent_class)->finalize (object);
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}
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static void
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gdk_x11_cursor_class_init (GdkX11CursorClass *xcursor_class)
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{
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GdkCursorClass *cursor_class = GDK_CURSOR_CLASS (xcursor_class);
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GObjectClass *object_class = G_OBJECT_CLASS (xcursor_class);
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object_class->finalize = gdk_x11_cursor_finalize;
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cursor_class->get_surface = gdk_x11_cursor_get_surface;
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}
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static void
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gdk_x11_cursor_init (GdkX11Cursor *cursor)
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{
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}
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static Cursor
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get_blank_cursor (GdkDisplay *display)
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{
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GdkScreen *screen;
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Pixmap pixmap;
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XColor color;
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Cursor cursor;
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cairo_surface_t *surface;
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cairo_t *cr;
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screen = gdk_display_get_default_screen (display);
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surface = _gdk_x11_window_create_bitmap_surface (gdk_screen_get_root_window (screen), 1, 1);
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/* Clear surface */
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cr = cairo_create (surface);
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cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
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cairo_paint (cr);
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cairo_destroy (cr);
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pixmap = cairo_xlib_surface_get_drawable (surface);
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color.pixel = 0;
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color.red = color.blue = color.green = 0;
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if (gdk_display_is_closed (display))
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cursor = None;
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else
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cursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display),
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pixmap, pixmap,
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&color, &color, 1, 1);
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cairo_surface_destroy (surface);
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return cursor;
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}
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GdkCursor*
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_gdk_x11_display_get_cursor_for_type (GdkDisplay *display,
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GdkCursorType cursor_type)
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{
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GdkX11Cursor *private;
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Cursor xcursor;
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if (gdk_display_is_closed (display))
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{
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xcursor = None;
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}
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else
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{
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private = find_in_cache (display, cursor_type, NULL);
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if (private)
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{
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/* Cache had it, add a ref for this user */
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g_object_ref (private);
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return (GdkCursor*) private;
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}
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else
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{
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if (cursor_type != GDK_BLANK_CURSOR)
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xcursor = XCreateFontCursor (GDK_DISPLAY_XDISPLAY (display),
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cursor_type);
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else
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xcursor = get_blank_cursor (display);
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}
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}
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private = g_object_new (GDK_TYPE_X11_CURSOR,
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"cursor-type", cursor_type,
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"display", display,
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NULL);
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private->xcursor = xcursor;
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private->name = NULL;
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private->serial = theme_serial;
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if (xcursor != None)
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add_to_cache (private);
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return GDK_CURSOR (private);
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}
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/**
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* gdk_x11_cursor_get_xdisplay:
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* @cursor: (type GdkX11Cursor): a #GdkCursor.
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*
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* Returns the display of a #GdkCursor.
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*
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* Returns: (transfer none): an Xlib Display*.
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**/
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Display *
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gdk_x11_cursor_get_xdisplay (GdkCursor *cursor)
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{
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g_return_val_if_fail (cursor != NULL, NULL);
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return GDK_DISPLAY_XDISPLAY (gdk_cursor_get_display (cursor));
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}
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/**
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* gdk_x11_cursor_get_xcursor:
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* @cursor: (type GdkX11Cursor): a #GdkCursor.
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*
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* Returns the X cursor belonging to a #GdkCursor.
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*
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* Returns: an Xlib Cursor.
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**/
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Cursor
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gdk_x11_cursor_get_xcursor (GdkCursor *cursor)
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{
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g_return_val_if_fail (cursor != NULL, None);
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return ((GdkX11Cursor *)cursor)->xcursor;
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}
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#if defined(HAVE_XCURSOR) && defined(HAVE_XFIXES) && XFIXES_MAJOR >= 2
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static cairo_surface_t *
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gdk_x11_cursor_get_surface (GdkCursor *cursor,
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gdouble *x_hot,
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gdouble *y_hot)
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{
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GdkDisplay *display;
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Display *xdisplay;
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GdkX11Cursor *private;
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XcursorImages *images = NULL;
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XcursorImage *image;
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gint size;
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cairo_surface_t *surface;
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gint scale;
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gchar *theme;
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private = GDK_X11_CURSOR (cursor);
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display = gdk_cursor_get_display (cursor);
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xdisplay = GDK_DISPLAY_XDISPLAY (display);
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size = XcursorGetDefaultSize (xdisplay);
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theme = XcursorGetTheme (xdisplay);
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if (cursor->type == GDK_CURSOR_IS_PIXMAP)
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{
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if (private->name)
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images = XcursorLibraryLoadImages (private->name, theme, size);
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}
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else
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images = XcursorShapeLoadImages (cursor->type, theme, size);
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if (!images)
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return NULL;
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image = images->images[0];
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/* Assume the currently set cursor was defined for the screen
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scale */
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scale =
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gdk_screen_get_monitor_scale_factor (gdk_display_get_default_screen (display), 0);
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surface = gdk_window_create_similar_image_surface (NULL,
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CAIRO_FORMAT_ARGB32,
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image->width,
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image->height,
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scale);
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memcpy (cairo_image_surface_get_data (surface),
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image->pixels, 4 * image->width * image->height);
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cairo_surface_mark_dirty (surface);
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if (x_hot)
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*x_hot = (double)image->xhot / scale;
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if (y_hot)
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*y_hot = (double)image->yhot / scale;
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XcursorImagesDestroy (images);
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return surface;
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}
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void
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_gdk_x11_cursor_update_theme (GdkCursor *cursor)
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{
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Display *xdisplay;
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GdkX11Cursor *private;
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Cursor new_cursor = None;
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GdkX11Display *display_x11;
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private = (GdkX11Cursor *) cursor;
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display_x11 = GDK_X11_DISPLAY (gdk_cursor_get_display (cursor));
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xdisplay = GDK_DISPLAY_XDISPLAY (display_x11);
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if (!display_x11->have_xfixes)
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return;
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if (private->serial == theme_serial)
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return;
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||
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private->serial = theme_serial;
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|
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if (private->xcursor != None)
|
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{
|
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if (cursor->type == GDK_BLANK_CURSOR)
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return;
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||
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if (cursor->type == GDK_CURSOR_IS_PIXMAP)
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{
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if (private->name)
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new_cursor = XcursorLibraryLoadCursor (xdisplay, private->name);
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}
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else
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new_cursor = XcursorShapeLoadCursor (xdisplay, cursor->type);
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if (new_cursor != None)
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{
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XFixesChangeCursor (xdisplay, new_cursor, private->xcursor);
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private->xcursor = new_cursor;
|
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}
|
||
}
|
||
}
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static void
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update_cursor (gpointer data,
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gpointer user_data)
|
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{
|
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GdkCursor *cursor;
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cursor = (GdkCursor*)(data);
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|
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if (!cursor)
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return;
|
||
|
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_gdk_x11_cursor_update_theme (cursor);
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}
|
||
|
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/**
|
||
* gdk_x11_display_set_cursor_theme:
|
||
* @display: (type GdkX11Display): a #GdkDisplay
|
||
* @theme: the name of the cursor theme to use, or %NULL to unset
|
||
* a previously set value
|
||
* @size: the cursor size to use, or 0 to keep the previous size
|
||
*
|
||
* Sets the cursor theme from which the images for cursor
|
||
* should be taken.
|
||
*
|
||
* If the windowing system supports it, existing cursors created
|
||
* with gdk_cursor_new(), gdk_cursor_new_for_display() and
|
||
* gdk_cursor_new_from_name() are updated to reflect the theme
|
||
* change. Custom cursors constructed with
|
||
* gdk_cursor_new_from_pixbuf() will have to be handled
|
||
* by the application (GTK+ applications can learn about
|
||
* cursor theme changes by listening for change notification
|
||
* for the corresponding #GtkSetting).
|
||
*
|
||
* Since: 2.8
|
||
*/
|
||
void
|
||
gdk_x11_display_set_cursor_theme (GdkDisplay *display,
|
||
const gchar *theme,
|
||
const gint size)
|
||
{
|
||
Display *xdisplay;
|
||
gchar *old_theme;
|
||
gint old_size;
|
||
|
||
g_return_if_fail (GDK_IS_DISPLAY (display));
|
||
|
||
xdisplay = GDK_DISPLAY_XDISPLAY (display);
|
||
|
||
old_theme = XcursorGetTheme (xdisplay);
|
||
old_size = XcursorGetDefaultSize (xdisplay);
|
||
|
||
if (old_size == size &&
|
||
(old_theme == theme ||
|
||
(old_theme && theme && strcmp (old_theme, theme) == 0)))
|
||
return;
|
||
|
||
theme_serial++;
|
||
|
||
XcursorSetTheme (xdisplay, theme);
|
||
if (size > 0)
|
||
XcursorSetDefaultSize (xdisplay, size);
|
||
|
||
g_slist_foreach (cursor_cache, update_cursor, NULL);
|
||
}
|
||
|
||
#else
|
||
|
||
static cairo_surface_t *
|
||
gdk_x11_cursor_get_surface (GdkCursor *cursor,
|
||
gdouble *x_hot,
|
||
gdouble *y_hot)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
void
|
||
gdk_x11_display_set_cursor_theme (GdkDisplay *display,
|
||
const gchar *theme,
|
||
const gint size)
|
||
{
|
||
g_return_if_fail (GDK_IS_DISPLAY (display));
|
||
}
|
||
|
||
void
|
||
_gdk_x11_cursor_update_theme (GdkCursor *cursor)
|
||
{
|
||
g_return_if_fail (cursor != NULL);
|
||
}
|
||
|
||
#endif
|
||
|
||
#ifdef HAVE_XCURSOR
|
||
|
||
static void
|
||
get_surface_size (cairo_surface_t *surface,
|
||
int *width,
|
||
int *height)
|
||
{
|
||
double x_scale, y_scale;
|
||
|
||
x_scale = y_scale = 1;
|
||
|
||
cairo_surface_get_device_scale (surface, &x_scale, &y_scale);
|
||
|
||
/* Assume any set scaling is icon scale */
|
||
*width =
|
||
ceil (cairo_image_surface_get_width (surface) / x_scale);
|
||
*height =
|
||
ceil (cairo_image_surface_get_height (surface) / y_scale);
|
||
}
|
||
|
||
static XcursorImage*
|
||
create_cursor_image (cairo_surface_t *source_surface,
|
||
gint x,
|
||
gint y,
|
||
gint scale)
|
||
{
|
||
gint width, height;
|
||
XcursorImage *xcimage;
|
||
cairo_surface_t *surface;
|
||
cairo_t *cr;
|
||
|
||
get_surface_size (source_surface, &width, &height);
|
||
|
||
width *= scale;
|
||
height *= scale;
|
||
|
||
xcimage = XcursorImageCreate (width, height);
|
||
|
||
xcimage->xhot = x * scale;
|
||
xcimage->yhot = y * scale;
|
||
|
||
surface = cairo_image_surface_create_for_data ((guchar *) xcimage->pixels,
|
||
CAIRO_FORMAT_ARGB32,
|
||
width,
|
||
height,
|
||
width * 4);
|
||
|
||
cairo_surface_set_device_scale (surface, scale, scale);
|
||
|
||
cr = cairo_create (surface);
|
||
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
|
||
cairo_set_source_surface (cr, source_surface, 0, 0);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
cairo_surface_destroy (surface);
|
||
|
||
return xcimage;
|
||
}
|
||
|
||
GdkCursor *
|
||
_gdk_x11_display_get_cursor_for_surface (GdkDisplay *display,
|
||
cairo_surface_t *surface,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
XcursorImage *xcimage;
|
||
Cursor xcursor;
|
||
GdkX11Cursor *private;
|
||
int target_scale;
|
||
|
||
if (gdk_display_is_closed (display))
|
||
{
|
||
xcursor = None;
|
||
}
|
||
else
|
||
{
|
||
target_scale =
|
||
gdk_screen_get_monitor_scale_factor (gdk_display_get_default_screen (display), 0);
|
||
xcimage = create_cursor_image (surface, x, y, target_scale);
|
||
xcursor = XcursorImageLoadCursor (GDK_DISPLAY_XDISPLAY (display), xcimage);
|
||
XcursorImageDestroy (xcimage);
|
||
}
|
||
|
||
private = g_object_new (GDK_TYPE_X11_CURSOR,
|
||
"cursor-type", GDK_CURSOR_IS_PIXMAP,
|
||
"display", display,
|
||
NULL);
|
||
private->xcursor = xcursor;
|
||
private->name = NULL;
|
||
private->serial = theme_serial;
|
||
|
||
return GDK_CURSOR (private);
|
||
}
|
||
|
||
static const struct {
|
||
const gchar *css_name, *traditional_name;
|
||
} name_map[] = {
|
||
{ "default", "left_ptr" },
|
||
{ "pointer", "hand" },
|
||
{ "progress", "left_ptr_watch" },
|
||
{ "wait", "watch" },
|
||
{ "cell", "crosshair" },
|
||
{ "crosshair", "cross" },
|
||
{ "text", "xterm" },
|
||
{ "alias", "dnd-link" },
|
||
{ "copy", "dnd-copy" },
|
||
{ "no-drop", "dnd-none" },
|
||
{ "not-allowed", "crossed_circle" },
|
||
{ "grab", "hand2" },
|
||
{ "col-resize", "h_double_arrow" },
|
||
{ "row-resize", "v_double_arrow" },
|
||
{ "n-resize", "top_side" },
|
||
{ "e-resize", "right_side" },
|
||
{ "s-resize", "bottom_side" },
|
||
{ "w-resize", "left_side" },
|
||
{ "ne-resize", "top_right_corner" },
|
||
{ "nw-resize", "top_left_corner" },
|
||
{ "se-resize", "bottom_right_corner" },
|
||
{ "sw-resize", "bottom_left_corner" },
|
||
{ "ew-resize", "h_double_arrow" },
|
||
{ "ns-resize", "v_double_arrow" },
|
||
{ "nesw-resize", "fd_double_arrow" },
|
||
{ "nwse-resize", "bd_double_arrow" },
|
||
{ NULL, NULL }
|
||
};
|
||
|
||
static const gchar *
|
||
name_fallback (const gchar *name)
|
||
{
|
||
gint i;
|
||
|
||
for (i = 0; name_map[i].css_name; i++)
|
||
{
|
||
if (g_str_equal (name_map[i].css_name, name))
|
||
return name_map[i].traditional_name;
|
||
}
|
||
|
||
return "left_ptr";
|
||
}
|
||
|
||
GdkCursor*
|
||
_gdk_x11_display_get_cursor_for_name (GdkDisplay *display,
|
||
const gchar *name)
|
||
{
|
||
Cursor xcursor;
|
||
Display *xdisplay;
|
||
GdkX11Cursor *private;
|
||
|
||
if (gdk_display_is_closed (display))
|
||
{
|
||
xcursor = None;
|
||
}
|
||
else
|
||
{
|
||
if (strcmp (name, "none") == 0)
|
||
return _gdk_x11_display_get_cursor_for_type (display, GDK_BLANK_CURSOR);
|
||
|
||
private = find_in_cache (display, GDK_CURSOR_IS_PIXMAP, name);
|
||
|
||
if (private)
|
||
{
|
||
/* Cache had it, add a ref for this user */
|
||
g_object_ref (private);
|
||
|
||
return (GdkCursor*) private;
|
||
}
|
||
|
||
xdisplay = GDK_DISPLAY_XDISPLAY (display);
|
||
xcursor = XcursorLibraryLoadCursor (xdisplay, name);
|
||
if (xcursor == None)
|
||
xcursor = XcursorLibraryLoadCursor (xdisplay, name_fallback (name));
|
||
if (xcursor == None)
|
||
xcursor = XcursorLibraryLoadCursor (xdisplay, "left_ptr");
|
||
if (xcursor == None)
|
||
return NULL;
|
||
}
|
||
|
||
private = g_object_new (GDK_TYPE_X11_CURSOR,
|
||
"cursor-type", GDK_CURSOR_IS_PIXMAP,
|
||
"display", display,
|
||
NULL);
|
||
private->xcursor = xcursor;
|
||
private->name = g_strdup (name);
|
||
private->serial = theme_serial;
|
||
|
||
add_to_cache (private);
|
||
|
||
return GDK_CURSOR (private);
|
||
}
|
||
|
||
gboolean
|
||
_gdk_x11_display_supports_cursor_alpha (GdkDisplay *display)
|
||
{
|
||
return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
|
||
}
|
||
|
||
gboolean
|
||
_gdk_x11_display_supports_cursor_color (GdkDisplay *display)
|
||
{
|
||
return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display));
|
||
}
|
||
|
||
void
|
||
_gdk_x11_display_get_default_cursor_size (GdkDisplay *display,
|
||
guint *width,
|
||
guint *height)
|
||
{
|
||
*width = *height = XcursorGetDefaultSize (GDK_DISPLAY_XDISPLAY (display));
|
||
}
|
||
|
||
#else
|
||
|
||
static GdkCursor*
|
||
gdk_cursor_new_from_pixmap (GdkDisplay *display,
|
||
Pixmap source_pixmap,
|
||
Pixmap mask_pixmap,
|
||
const GdkRGBA *fg,
|
||
const GdkRGBA *bg,
|
||
gint x,
|
||
gint y)
|
||
{
|
||
GdkX11Cursor *private;
|
||
Cursor xcursor;
|
||
XColor xfg, xbg;
|
||
|
||
g_return_val_if_fail (fg != NULL, NULL);
|
||
g_return_val_if_fail (bg != NULL, NULL);
|
||
|
||
xfg.red = fg->red * 65535;
|
||
xfg.blue = fg->blue * 65535;
|
||
xfg.green = fg->green * 65535;
|
||
|
||
xbg.red = bg->red * 65535;
|
||
xbg.blue = bg->blue * 65535;
|
||
xbg.green = bg->green * 65535;
|
||
|
||
if (gdk_display_is_closed (display))
|
||
xcursor = None;
|
||
else
|
||
xcursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display),
|
||
source_pixmap, mask_pixmap, &xfg, &xbg, x, y);
|
||
private = g_object_new (GDK_TYPE_X11_CURSOR,
|
||
"cursor-type", GDK_CURSOR_IS_PIXMAP,
|
||
"display", display,
|
||
NULL);
|
||
private->xcursor = xcursor;
|
||
private->name = NULL;
|
||
private->serial = theme_serial;
|
||
|
||
return GDK_CURSOR (private);
|
||
}
|
||
|
||
GdkCursor *
|
||
_gdk_x11_display_get_cursor_for_surface (GdkDisplay *display,
|
||
cairo_surface_t *surface,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
GdkCursor *cursor;
|
||
cairo_surface_t *pixmap, *mask;
|
||
guint width, height, n_channels, rowstride, data_stride, i, j;
|
||
guint8 *data, *mask_data, *pixels;
|
||
GdkRGBA fg = { 0, 0, 0, 1 };
|
||
GdkRGBA bg = { 1, 1, 1, 1 };
|
||
GdkScreen *screen;
|
||
cairo_surface_t *image;
|
||
cairo_t *cr;
|
||
GdkPixbuf *pixbuf;
|
||
|
||
width = cairo_image_surface_get_width (surface);
|
||
height = cairo_image_surface_get_height (surface);
|
||
|
||
g_return_val_if_fail (0 <= x && x < width, NULL);
|
||
g_return_val_if_fail (0 <= y && y < height, NULL);
|
||
|
||
/* Note: This does not support scaled surfaced, if you need that you
|
||
want XCursor anyway */
|
||
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0, width, height);
|
||
|
||
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
|
||
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
|
||
pixels = gdk_pixbuf_get_pixels (pixbuf);
|
||
|
||
data_stride = 4 * ((width + 31) / 32);
|
||
data = g_new0 (guint8, data_stride * height);
|
||
mask_data = g_new0 (guint8, data_stride * height);
|
||
|
||
for (j = 0; j < height; j++)
|
||
{
|
||
guint8 *src = pixels + j * rowstride;
|
||
guint8 *d = data + data_stride * j;
|
||
guint8 *md = mask_data + data_stride * j;
|
||
|
||
for (i = 0; i < width; i++)
|
||
{
|
||
if (src[1] < 0x80)
|
||
*d |= 1 << (i % 8);
|
||
|
||
if (n_channels == 3 || src[3] >= 0x80)
|
||
*md |= 1 << (i % 8);
|
||
|
||
src += n_channels;
|
||
if (i % 8 == 7)
|
||
{
|
||
d++;
|
||
md++;
|
||
}
|
||
}
|
||
}
|
||
|
||
g_object_unref (pixbuf);
|
||
|
||
screen = gdk_display_get_default_screen (display);
|
||
|
||
pixmap = _gdk_x11_window_create_bitmap_surface (gdk_screen_get_root_window (screen),
|
||
width, height);
|
||
cr = cairo_create (pixmap);
|
||
image = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_A1,
|
||
width, height, data_stride);
|
||
cairo_set_source_surface (cr, image, 0, 0);
|
||
cairo_surface_destroy (image);
|
||
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
|
||
mask = _gdk_x11_window_create_bitmap_surface (gdk_screen_get_root_window (screen),
|
||
width, height);
|
||
cr = cairo_create (mask);
|
||
image = cairo_image_surface_create_for_data (mask_data, CAIRO_FORMAT_A1,
|
||
width, height, data_stride);
|
||
cairo_set_source_surface (cr, image, 0, 0);
|
||
cairo_surface_destroy (image);
|
||
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
|
||
cairo_paint (cr);
|
||
cairo_destroy (cr);
|
||
|
||
cursor = gdk_cursor_new_from_pixmap (display,
|
||
cairo_xlib_surface_get_drawable (pixmap),
|
||
cairo_xlib_surface_get_drawable (mask),
|
||
&fg, &bg,
|
||
x, y);
|
||
|
||
cairo_surface_destroy (pixmap);
|
||
cairo_surface_destroy (mask);
|
||
|
||
g_free (data);
|
||
g_free (mask_data);
|
||
|
||
return cursor;
|
||
}
|
||
|
||
GdkCursor*
|
||
_gdk_x11_display_get_cursor_for_name (GdkDisplay *display,
|
||
const gchar *name)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
gboolean
|
||
_gdk_x11_display_supports_cursor_alpha (GdkDisplay *display)
|
||
{
|
||
return FALSE;
|
||
}
|
||
|
||
gboolean
|
||
_gdk_x11_display_supports_cursor_color (GdkDisplay *display)
|
||
{
|
||
return FALSE;
|
||
}
|
||
|
||
void
|
||
_gdk_x11_display_get_default_cursor_size (GdkDisplay *display,
|
||
guint *width,
|
||
guint *height)
|
||
{
|
||
/* no idea, really */
|
||
*width = *height = 20;
|
||
return;
|
||
}
|
||
|
||
#endif
|
||
|
||
void
|
||
_gdk_x11_display_get_maximal_cursor_size (GdkDisplay *display,
|
||
guint *width,
|
||
guint *height)
|
||
{
|
||
GdkScreen *screen;
|
||
GdkWindow *window;
|
||
|
||
g_return_if_fail (GDK_IS_DISPLAY (display));
|
||
|
||
screen = gdk_display_get_default_screen (display);
|
||
window = gdk_screen_get_root_window (screen);
|
||
XQueryBestCursor (GDK_DISPLAY_XDISPLAY (display),
|
||
GDK_WINDOW_XID (window),
|
||
128, 128, width, height);
|
||
}
|