/* GDK - The GIMP Drawing Kit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" /* needs to be first because any header might include gdk-pixbuf.h otherwise */ #define GDK_PIXBUF_ENABLE_BACKEND #include #include "gdkcursor.h" #include "gdkcursorprivate.h" #include "gdkprivate-x11.h" #include "gdkdisplay-x11.h" #include #include #ifdef HAVE_XCURSOR #include #endif #ifdef HAVE_XFIXES #include #endif #include #include struct _GdkX11Cursor { GdkCursor cursor; Cursor xcursor; gchar *name; guint serial; }; struct _GdkX11CursorClass { GdkCursorClass cursor_class; }; static guint theme_serial = 0; /* cursor_cache holds a cache of non-pixmap cursors to avoid expensive * libXcursor searches, cursors are added to it but only removed when * their display is closed. We make the assumption that since there are * a small number of display's and a small number of cursor's that this * list will stay small enough not to be a problem. */ static GSList* cursor_cache = NULL; struct cursor_cache_key { GdkDisplay* display; GdkCursorType type; const char* name; }; /* Caller should check if there is already a match first. * Cursor MUST be either a typed cursor or a pixmap with * a non-NULL name. */ static void add_to_cache (GdkX11Cursor* cursor) { cursor_cache = g_slist_prepend (cursor_cache, cursor); /* Take a ref so that if the caller frees it we still have it */ g_object_ref (cursor); } /* Returns 0 on a match */ static gint cache_compare_func (gconstpointer listelem, gconstpointer target) { GdkX11Cursor* cursor = (GdkX11Cursor*)listelem; struct cursor_cache_key* key = (struct cursor_cache_key*)target; if ((cursor->cursor.type != key->type) || (gdk_cursor_get_display (GDK_CURSOR (cursor)) != key->display)) return 1; /* No match */ /* Elements marked as pixmap must be named cursors * (since we don't store normal pixmap cursors */ if (key->type == GDK_CURSOR_IS_PIXMAP) return strcmp (key->name, cursor->name); return 0; /* Match */ } /* Returns the cursor if there is a match, NULL if not * For named cursors type shall be GDK_CURSOR_IS_PIXMAP * For unnamed, typed cursors, name shall be NULL */ static GdkX11Cursor* find_in_cache (GdkDisplay *display, GdkCursorType type, const char *name) { GSList* res; struct cursor_cache_key key; key.display = display; key.type = type; key.name = name; res = g_slist_find_custom (cursor_cache, &key, cache_compare_func); if (res) return (GdkX11Cursor *) res->data; return NULL; } /* Called by gdk_x11_display_finalize to flush any cached cursors * for a dead display. */ void _gdk_x11_cursor_display_finalize (GdkDisplay *display) { GSList* item; GSList** itemp; /* Pointer to the thing to fix when we delete an item */ item = cursor_cache; itemp = &cursor_cache; while (item) { GdkX11Cursor* cursor = (GdkX11Cursor*)(item->data); if (gdk_cursor_get_display (GDK_CURSOR (cursor)) == display) { GSList* olditem; gdk_cursor_unref ((GdkCursor*) cursor); /* Remove this item from the list */ *(itemp) = item->next; olditem = item; item = g_slist_next (item); g_slist_free_1 (olditem); } else { itemp = &(item->next); item = g_slist_next (item); } } } /*** GdkX11Cursor ***/ G_DEFINE_TYPE (GdkX11Cursor, gdk_x11_cursor, GDK_TYPE_CURSOR) static GdkPixbuf* gdk_x11_cursor_get_image (GdkCursor *cursor); static void gdk_x11_cursor_finalize (GObject *object) { GdkX11Cursor *private = GDK_X11_CURSOR (object); GdkDisplay *display; display = gdk_cursor_get_display (GDK_CURSOR (object)); if (private->xcursor && !gdk_display_is_closed (display)) XFreeCursor (GDK_DISPLAY_XDISPLAY (display), private->xcursor); g_free (private->name); G_OBJECT_CLASS (gdk_x11_cursor_parent_class)->finalize (object); } static void gdk_x11_cursor_class_init (GdkX11CursorClass *xcursor_class) { GdkCursorClass *cursor_class = GDK_CURSOR_CLASS (xcursor_class); GObjectClass *object_class = G_OBJECT_CLASS (xcursor_class); object_class->finalize = gdk_x11_cursor_finalize; cursor_class->get_image = gdk_x11_cursor_get_image; } static void gdk_x11_cursor_init (GdkX11Cursor *cursor) { } static Cursor get_blank_cursor (GdkDisplay *display) { GdkScreen *screen; Pixmap pixmap; XColor color; Cursor cursor; cairo_surface_t *surface; cairo_t *cr; screen = gdk_display_get_default_screen (display); surface = _gdk_x11_window_create_bitmap_surface (gdk_screen_get_root_window (screen), 1, 1); /* Clear surface */ cr = cairo_create (surface); cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); cairo_paint (cr); cairo_destroy (cr); pixmap = cairo_xlib_surface_get_drawable (surface); color.pixel = 0; color.red = color.blue = color.green = 0; if (gdk_display_is_closed (display)) cursor = None; else cursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display), pixmap, pixmap, &color, &color, 1, 1); cairo_surface_destroy (surface); return cursor; } GdkCursor* _gdk_x11_display_get_cursor_for_type (GdkDisplay *display, GdkCursorType cursor_type) { GdkX11Cursor *private; Cursor xcursor; if (gdk_display_is_closed (display)) { xcursor = None; } else { private = find_in_cache (display, cursor_type, NULL); if (private) { /* Cache had it, add a ref for this user */ g_object_ref (private); return (GdkCursor*) private; } else { if (cursor_type != GDK_BLANK_CURSOR) xcursor = XCreateFontCursor (GDK_DISPLAY_XDISPLAY (display), cursor_type); else xcursor = get_blank_cursor (display); } } private = g_object_new (GDK_TYPE_X11_CURSOR, "cursor-type", cursor_type, "display", display, NULL); private->xcursor = xcursor; private->name = NULL; private->serial = theme_serial; if (xcursor != None) add_to_cache (private); return GDK_CURSOR (private); } /** * gdk_x11_cursor_get_xdisplay: * @cursor: a #GdkCursor. * * Returns the display of a #GdkCursor. * * Return value: an Xlib Display*. **/ Display * gdk_x11_cursor_get_xdisplay (GdkCursor *cursor) { g_return_val_if_fail (cursor != NULL, NULL); return GDK_DISPLAY_XDISPLAY (gdk_cursor_get_display (cursor)); } /** * gdk_x11_cursor_get_xcursor: * @cursor: a #GdkCursor. * * Returns the X cursor belonging to a #GdkCursor. * * Return value: an Xlib Cursor. **/ Cursor gdk_x11_cursor_get_xcursor (GdkCursor *cursor) { g_return_val_if_fail (cursor != NULL, None); return ((GdkX11Cursor *)cursor)->xcursor; } #if defined(HAVE_XCURSOR) && defined(HAVE_XFIXES) && XFIXES_MAJOR >= 2 static GdkPixbuf* gdk_x11_cursor_get_image (GdkCursor *cursor) { Display *xdisplay; GdkX11Cursor *private; XcursorImages *images = NULL; XcursorImage *image; gint size; gchar buf[32]; guchar *data, *p, tmp; GdkPixbuf *pixbuf; gchar *theme; private = GDK_X11_CURSOR (cursor); xdisplay = GDK_DISPLAY_XDISPLAY (gdk_cursor_get_display (cursor)); size = XcursorGetDefaultSize (xdisplay); theme = XcursorGetTheme (xdisplay); if (cursor->type == GDK_CURSOR_IS_PIXMAP) { if (private->name) images = XcursorLibraryLoadImages (private->name, theme, size); } else images = XcursorShapeLoadImages (cursor->type, theme, size); if (!images) return NULL; image = images->images[0]; data = g_malloc (4 * image->width * image->height); memcpy (data, image->pixels, 4 * image->width * image->height); for (p = data; p < data + (4 * image->width * image->height); p += 4) { tmp = p[0]; p[0] = p[2]; p[2] = tmp; } pixbuf = gdk_pixbuf_new_from_data (data, GDK_COLORSPACE_RGB, TRUE, 8, image->width, image->height, 4 * image->width, (GdkPixbufDestroyNotify)g_free, NULL); if (private->name) gdk_pixbuf_set_option (pixbuf, "name", private->name); g_snprintf (buf, 32, "%d", image->xhot); gdk_pixbuf_set_option (pixbuf, "x_hot", buf); g_snprintf (buf, 32, "%d", image->yhot); gdk_pixbuf_set_option (pixbuf, "y_hot", buf); XcursorImagesDestroy (images); return pixbuf; } void _gdk_x11_cursor_update_theme (GdkCursor *cursor) { Display *xdisplay; GdkX11Cursor *private; Cursor new_cursor = None; GdkX11Display *display_x11; private = (GdkX11Cursor *) cursor; display_x11 = GDK_X11_DISPLAY (gdk_cursor_get_display (cursor)); xdisplay = GDK_DISPLAY_XDISPLAY (display_x11); if (!display_x11->have_xfixes) return; if (private->serial == theme_serial) return; private->serial = theme_serial; if (private->xcursor != None) { if (cursor->type == GDK_BLANK_CURSOR) return; if (cursor->type == GDK_CURSOR_IS_PIXMAP) { if (private->name) new_cursor = XcursorLibraryLoadCursor (xdisplay, private->name); } else new_cursor = XcursorShapeLoadCursor (xdisplay, cursor->type); if (new_cursor != None) { XFixesChangeCursor (xdisplay, new_cursor, private->xcursor); private->xcursor = new_cursor; } } } static void update_cursor (gpointer data, gpointer user_data) { GdkCursor *cursor; cursor = (GdkCursor*)(data); if (!cursor) return; _gdk_x11_cursor_update_theme (cursor); } /** * gdk_x11_display_set_cursor_theme: * @display: 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_for_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) { GdkX11Display *display_x11; Display *xdisplay; gchar *old_theme; gint old_size; g_return_if_fail (GDK_IS_DISPLAY (display)); display_x11 = GDK_X11_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 GdkPixbuf* gdk_x11_cursor_get_image (GdkCursor *cursor) { 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 XcursorImage* create_cursor_image (GdkPixbuf *pixbuf, gint x, gint y) { guint width, height; XcursorImage *xcimage; cairo_surface_t *surface; cairo_t *cr; width = gdk_pixbuf_get_width (pixbuf); height = gdk_pixbuf_get_height (pixbuf); xcimage = XcursorImageCreate (width, height); xcimage->xhot = x; xcimage->yhot = y; surface = cairo_image_surface_create_for_data ((guchar *) xcimage->pixels, CAIRO_FORMAT_ARGB32, width, height, width * 4); cr = cairo_create (surface); cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE); gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0); cairo_paint (cr); cairo_destroy (cr); cairo_surface_destroy (surface); return xcimage; } GdkCursor * _gdk_x11_display_get_cursor_for_pixbuf (GdkDisplay *display, GdkPixbuf *pixbuf, gint x, gint y) { XcursorImage *xcimage; Cursor xcursor; GdkX11Cursor *private; const char *option; char *end; gint64 value; if (x == -1 && (option = gdk_pixbuf_get_option (pixbuf, "x_hot"))) { errno = 0; end = NULL; value = g_ascii_strtoll (option, &end, 10); if (errno == 0 && end != option && value >= 0 && value < G_MAXINT) x = (gint) value; } if (y == -1 && (option = gdk_pixbuf_get_option (pixbuf, "y_hot"))) { errno = 0; end = NULL; value = g_ascii_strtoll (option, &end, 10); if (errno == 0 && end != option && value >= 0 && value < G_MAXINT) y = (gint) value; } g_return_val_if_fail (0 <= x && x < gdk_pixbuf_get_width (pixbuf), NULL); g_return_val_if_fail (0 <= y && y < gdk_pixbuf_get_height (pixbuf), NULL); if (gdk_display_is_closed (display)) { xcursor = None; } else { xcimage = create_cursor_image (pixbuf, x, y); 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); } 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 { 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) 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 GdkColor *fg, const GdkColor *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.pixel = fg->pixel; xfg.red = fg->red; xfg.blue = fg->blue; xfg.green = fg->green; xbg.pixel = bg->pixel; xbg.red = bg->red; xbg.blue = bg->blue; xbg.green = bg->green; if (gdk_display_is_closed (display->closed)) 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_pixbuf (GdkDisplay *display, GdkPixbuf *pixbuf, gint x, gint y) { GdkCursor *cursor; cairo_surface_t *pixmap, *mask; guint width, height, n_channels, rowstride, data_stride, i, j; guint8 *data, *mask_data, *pixels; GdkColor fg = { 0, 0, 0, 0 }; GdkColor bg = { 0, 0xffff, 0xffff, 0xffff }; GdkScreen *screen; cairo_surface_t *image; cairo_t *cr; width = gdk_pixbuf_get_width (pixbuf); height = gdk_pixbuf_get_height (pixbuf); g_return_val_if_fail (0 <= x && x < width, NULL); g_return_val_if_fail (0 <= y && y < height, NULL); 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++; } } } 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) { /* no idea, really */ return 20; } #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); }