/* 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" #define GDK_PIXBUF_ENABLE_BACKEND #include #include #ifdef HAVE_XCURSOR #include #endif #ifdef HAVE_XFIXES #include #endif #include #include "gdkprivate-x11.h" #include "gdkcursor.h" #include "gdkdisplay-x11.h" #include "gdkpixmap-x11.h" #include "gdkx.h" #include #include 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 (GdkCursorPrivate* cursor) { cursor_cache = g_slist_prepend (cursor_cache, cursor); /* Take a ref so that if the caller frees it we still have it */ gdk_cursor_ref ((GdkCursor*) cursor); } /* Returns 0 on a match */ static gint cache_compare_func (gconstpointer listelem, gconstpointer target) { GdkCursorPrivate* cursor = (GdkCursorPrivate*)listelem; struct cursor_cache_key* key = (struct cursor_cache_key*)target; if ((cursor->cursor.type != key->type) || (cursor->display != 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 GdkCursorPrivate* 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 (GdkCursorPrivate *) res->data; return NULL; } /* Called by gdk_display_x11_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) { GdkCursorPrivate* cursor = (GdkCursorPrivate*)(item->data); if (cursor->display == 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); } } } static Cursor get_blank_cursor (GdkDisplay *display) { GdkScreen *screen; GdkPixmap *pixmap; Pixmap source_pixmap; XColor color; Cursor cursor; screen = gdk_display_get_default_screen (display); pixmap = gdk_bitmap_create_from_data (gdk_screen_get_root_window (screen), "\0\0\0\0\0\0\0\0", 1, 1); source_pixmap = GDK_PIXMAP_XID (pixmap); color.pixel = 0; color.red = color.blue = color.green = 0; if (display->closed) cursor = None; else cursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display), source_pixmap, source_pixmap, &color, &color, 1, 1); g_object_unref (pixmap); return cursor; } /** * gdk_cursor_new_for_display: * @display: the #GdkDisplay for which the cursor will be created * @cursor_type: cursor to create * * Creates a new cursor from the set of builtin cursors. * Some useful ones are: * * * #GDK_RIGHT_PTR (right-facing arrow) * * * #GDK_CROSSHAIR (crosshair) * * * #GDK_XTERM (I-beam) * * * #GDK_WATCH (busy) * * * #GDK_FLEUR (for moving objects) * * * #GDK_HAND1 (a right-pointing hand) * * * #GDK_HAND2 (a left-pointing hand) * * * #GDK_LEFT_SIDE (resize left side) * * * #GDK_RIGHT_SIDE (resize right side) * * * #GDK_TOP_LEFT_CORNER (resize northwest corner) * * * #GDK_TOP_RIGHT_CORNER (resize northeast corner) * * * #GDK_BOTTOM_LEFT_CORNER (resize southwest corner) * * * #GDK_BOTTOM_RIGHT_CORNER (resize southeast corner) * * * #GDK_TOP_SIDE (resize top side) * * * #GDK_BOTTOM_SIDE (resize bottom side) * * * #GDK_SB_H_DOUBLE_ARROW (move vertical splitter) * * * #GDK_SB_V_DOUBLE_ARROW (move horizontal splitter) * * * #GDK_BLANK_CURSOR (Blank cursor). Since 2.16 * * * * Return value: a new #GdkCursor * * Since: 2.2 **/ GdkCursor* gdk_cursor_new_for_display (GdkDisplay *display, GdkCursorType cursor_type) { GdkCursorPrivate *private; GdkCursor *cursor; Cursor xcursor; g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL); if (display->closed) { xcursor = None; } else { private = find_in_cache (display, cursor_type, NULL); if (private) { /* Cache had it, add a ref for this user */ gdk_cursor_ref ((GdkCursor*) 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_new (GdkCursorPrivate, 1); private->display = display; private->xcursor = xcursor; private->name = NULL; private->serial = theme_serial; cursor = (GdkCursor *) private; cursor->type = cursor_type; cursor->ref_count = 1; if (xcursor != None) add_to_cache (private); return cursor; } /** * gdk_cursor_new_from_pixmap: * @source: the pixmap specifying the cursor. * @mask: the pixmap specifying the mask, which must be the same size as * @source. * @fg: the foreground color, used for the bits in the source which are 1. * The color does not have to be allocated first. * @bg: the background color, used for the bits in the source which are 0. * The color does not have to be allocated first. * @x: the horizontal offset of the 'hotspot' of the cursor. * @y: the vertical offset of the 'hotspot' of the cursor. * * Creates a new cursor from a given pixmap and mask. Both the pixmap and mask * must have a depth of 1 (i.e. each pixel has only 2 values - on or off). * The standard cursor size is 16 by 16 pixels. You can create a bitmap * from inline data as in the below example. * * Creating a custom cursor * * /* This data is in X bitmap format, and can be created with the 'bitmap' * utility. */ * #define cursor1_width 16 * #define cursor1_height 16 * static unsigned char cursor1_bits[] = { * 0x80, 0x01, 0x40, 0x02, 0x20, 0x04, 0x10, 0x08, 0x08, 0x10, 0x04, 0x20, * 0x82, 0x41, 0x41, 0x82, 0x41, 0x82, 0x82, 0x41, 0x04, 0x20, 0x08, 0x10, * 0x10, 0x08, 0x20, 0x04, 0x40, 0x02, 0x80, 0x01}; * * static unsigned char cursor1mask_bits[] = { * 0x80, 0x01, 0xc0, 0x03, 0x60, 0x06, 0x30, 0x0c, 0x18, 0x18, 0x8c, 0x31, * 0xc6, 0x63, 0x63, 0xc6, 0x63, 0xc6, 0xc6, 0x63, 0x8c, 0x31, 0x18, 0x18, * 0x30, 0x0c, 0x60, 0x06, 0xc0, 0x03, 0x80, 0x01}; * * * GdkCursor *cursor; * GdkPixmap *source, *mask; * GdkColor fg = { 0, 65535, 0, 0 }; /* Red. */ * GdkColor bg = { 0, 0, 0, 65535 }; /* Blue. */ * * * source = gdk_bitmap_create_from_data (NULL, cursor1_bits, * cursor1_width, cursor1_height); * mask = gdk_bitmap_create_from_data (NULL, cursor1mask_bits, * cursor1_width, cursor1_height); * cursor = gdk_cursor_new_from_pixmap (source, mask, &fg, &bg, 8, 8); * g_object_unref (source); * g_object_unref (mask); * * * gdk_window_set_cursor (widget->window, cursor); * * * * Return value: a new #GdkCursor. **/ GdkCursor* gdk_cursor_new_from_pixmap (GdkPixmap *source, GdkPixmap *mask, const GdkColor *fg, const GdkColor *bg, gint x, gint y) { GdkCursorPrivate *private; GdkCursor *cursor; Pixmap source_pixmap, mask_pixmap; Cursor xcursor; XColor xfg, xbg; GdkDisplay *display; g_return_val_if_fail (GDK_IS_PIXMAP (source), NULL); g_return_val_if_fail (GDK_IS_PIXMAP (mask), NULL); g_return_val_if_fail (fg != NULL, NULL); g_return_val_if_fail (bg != NULL, NULL); source_pixmap = GDK_PIXMAP_XID (source); mask_pixmap = GDK_PIXMAP_XID (mask); display = GDK_PIXMAP_DISPLAY (source); 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 (display->closed) xcursor = None; else xcursor = XCreatePixmapCursor (GDK_DISPLAY_XDISPLAY (display), source_pixmap, mask_pixmap, &xfg, &xbg, x, y); private = g_new (GdkCursorPrivate, 1); private->display = display; private->xcursor = xcursor; private->name = NULL; private->serial = theme_serial; cursor = (GdkCursor *) private; cursor->type = GDK_CURSOR_IS_PIXMAP; cursor->ref_count = 1; return cursor; } void _gdk_cursor_destroy (GdkCursor *cursor) { GdkCursorPrivate *private; g_return_if_fail (cursor != NULL); g_return_if_fail (cursor->ref_count == 0); private = (GdkCursorPrivate *) cursor; if (!private->display->closed && private->xcursor) XFreeCursor (GDK_DISPLAY_XDISPLAY (private->display), private->xcursor); g_free (private->name); g_free (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(((GdkCursorPrivate *)cursor)->display); } /** * 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 ((GdkCursorPrivate *)cursor)->xcursor; } /** * gdk_cursor_get_display: * @cursor: a #GdkCursor. * * Returns the display on which the #GdkCursor is defined. * * Returns: the #GdkDisplay associated to @cursor * * Since: 2.2 */ GdkDisplay * gdk_cursor_get_display (GdkCursor *cursor) { g_return_val_if_fail (cursor != NULL, NULL); return ((GdkCursorPrivate *)cursor)->display; } #if defined(HAVE_XCURSOR) && defined(HAVE_XFIXES) && XFIXES_MAJOR >= 2 /** * gdk_cursor_get_image: * @cursor: a #GdkCursor * * Returns a #GdkPixbuf with the image used to display the cursor. * * Note that depending on the capabilities of the windowing system and * on the cursor, GDK may not be able to obtain the image data. In this * case, %NULL is returned. * * Returns: a #GdkPixbuf representing @cursor, or %NULL * * Since: 2.8 */ GdkPixbuf* gdk_cursor_get_image (GdkCursor *cursor) { Display *xdisplay; GdkCursorPrivate *private; XcursorImages *images = NULL; XcursorImage *image; gint size; gchar buf[32]; guchar *data, *p, tmp; GdkPixbuf *pixbuf; gchar *theme; g_return_val_if_fail (cursor != NULL, NULL); private = (GdkCursorPrivate *) cursor; xdisplay = GDK_DISPLAY_XDISPLAY (private->display); 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; GdkCursorPrivate *private; Cursor new_cursor = None; GdkDisplayX11 *display_x11; private = (GdkCursorPrivate *) cursor; xdisplay = GDK_DISPLAY_XDISPLAY (private->display); display_x11 = GDK_DISPLAY_X11 (private->display); 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_pixmap() * or 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) { GdkDisplayX11 *display_x11; Display *xdisplay; gchar *old_theme; gint old_size; g_return_if_fail (GDK_IS_DISPLAY (display)); display_x11 = GDK_DISPLAY_X11 (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 GdkPixbuf* gdk_cursor_get_image (GdkCursor *cursor) { g_return_val_if_fail (cursor != NULL, NULL); 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, rowstride, n_channels; guchar *pixels, *src; XcursorImage *xcimage; XcursorPixel *dest; width = gdk_pixbuf_get_width (pixbuf); height = gdk_pixbuf_get_height (pixbuf); n_channels = gdk_pixbuf_get_n_channels (pixbuf); rowstride = gdk_pixbuf_get_rowstride (pixbuf); pixels = gdk_pixbuf_get_pixels (pixbuf); xcimage = XcursorImageCreate (width, height); xcimage->xhot = x; xcimage->yhot = y; dest = xcimage->pixels; if (n_channels == 3) { gint i, j; for (j = 0; j < height; j++) { src = pixels + j * rowstride; for (i = 0; i < width; i++) { *dest = (0xff << 24) | (src[0] << 16) | (src[1] << 8) | src[2]; } src += n_channels; dest++; } } else { _gdk_x11_convert_to_format (pixels, rowstride, (guchar *) dest, 4 * width, GDK_X11_FORMAT_ARGB, (G_BYTE_ORDER == G_BIG_ENDIAN) ? GDK_MSB_FIRST : GDK_LSB_FIRST, width, height); } return xcimage; } /** * gdk_cursor_new_from_pixbuf: * @display: the #GdkDisplay for which the cursor will be created * @pixbuf: the #GdkPixbuf containing the cursor image * @x: the horizontal offset of the 'hotspot' of the cursor. * @y: the vertical offset of the 'hotspot' of the cursor. * * Creates a new cursor from a pixbuf. * * Not all GDK backends support RGBA cursors. If they are not * supported, a monochrome approximation will be displayed. * The functions gdk_display_supports_cursor_alpha() and * gdk_display_supports_cursor_color() can be used to determine * whether RGBA cursors are supported; * gdk_display_get_default_cursor_size() and * gdk_display_get_maximal_cursor_size() give information about * cursor sizes. * * On the X backend, support for RGBA cursors requires a * sufficently new version of the X Render extension. * * Returns: a new #GdkCursor. * * Since: 2.4 */ GdkCursor * gdk_cursor_new_from_pixbuf (GdkDisplay *display, GdkPixbuf *pixbuf, gint x, gint y) { XcursorImage *xcimage; Cursor xcursor; GdkCursorPrivate *private; GdkCursor *cursor; g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL); g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL); 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 (display->closed) xcursor = None; else { xcimage = create_cursor_image (pixbuf, x, y); xcursor = XcursorImageLoadCursor (GDK_DISPLAY_XDISPLAY (display), xcimage); XcursorImageDestroy (xcimage); } private = g_new (GdkCursorPrivate, 1); private->display = display; private->xcursor = xcursor; private->name = NULL; private->serial = theme_serial; cursor = (GdkCursor *) private; cursor->type = GDK_CURSOR_IS_PIXMAP; cursor->ref_count = 1; return cursor; } /** * gdk_cursor_new_from_name: * @display: the #GdkDisplay for which the cursor will be created * @name: the name of the cursor * * Creates a new cursor by looking up @name in the current cursor * theme. * * Returns: a new #GdkCursor, or %NULL if there is no cursor with * the given name * * Since: 2.8 */ GdkCursor* gdk_cursor_new_from_name (GdkDisplay *display, const gchar *name) { Cursor xcursor; Display *xdisplay; GdkCursorPrivate *private; GdkCursor *cursor; g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL); if (display->closed) xcursor = None; else { private = find_in_cache (display, GDK_CURSOR_IS_PIXMAP, name); if (private) { /* Cache had it, add a ref for this user */ gdk_cursor_ref ((GdkCursor*) private); return (GdkCursor*) private; } xdisplay = GDK_DISPLAY_XDISPLAY (display); xcursor = XcursorLibraryLoadCursor (xdisplay, name); if (xcursor == None) return NULL; } private = g_new (GdkCursorPrivate, 1); private->display = display; private->xcursor = xcursor; private->name = g_strdup (name); private->serial = theme_serial; cursor = (GdkCursor *) private; cursor->type = GDK_CURSOR_IS_PIXMAP; cursor->ref_count = 1; add_to_cache (private); return cursor; } /** * gdk_display_supports_cursor_alpha: * @display: a #GdkDisplay * * Returns %TRUE if cursors can use an 8bit alpha channel * on @display. Otherwise, cursors are restricted to bilevel * alpha (i.e. a mask). * * Returns: whether cursors can have alpha channels. * * Since: 2.4 */ gboolean gdk_display_supports_cursor_alpha (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE); return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display)); } /** * gdk_display_supports_cursor_color: * @display: a #GdkDisplay * * Returns %TRUE if multicolored cursors are supported * on @display. Otherwise, cursors have only a forground * and a background color. * * Returns: whether cursors can have multiple colors. * * Since: 2.4 */ gboolean gdk_display_supports_cursor_color (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE); return XcursorSupportsARGB (GDK_DISPLAY_XDISPLAY (display)); } /** * gdk_display_get_default_cursor_size: * @display: a #GdkDisplay * * Returns the default size to use for cursors on @display. * * Returns: the default cursor size. * * Since: 2.4 */ guint gdk_display_get_default_cursor_size (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE); return XcursorGetDefaultSize (GDK_DISPLAY_XDISPLAY (display)); } #else GdkCursor * gdk_cursor_new_from_pixbuf (GdkDisplay *display, GdkPixbuf *pixbuf, gint x, gint y) { GdkCursor *cursor; GdkPixmap *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; g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL); g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL); 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_pixmap_new (gdk_screen_get_root_window (screen), width, height, 1); cr = gdk_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_pixmap_new (gdk_screen_get_root_window (screen), width, height, 1); cr = gdk_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 (pixmap, mask, &fg, &bg, x, y); g_object_unref (pixmap); g_object_unref (mask); g_free (data); g_free (mask_data); return cursor; } GdkCursor* gdk_cursor_new_from_name (GdkDisplay *display, const gchar *name) { g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL); return NULL; } gboolean gdk_display_supports_cursor_alpha (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE); return FALSE; } gboolean gdk_display_supports_cursor_color (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE); return FALSE; } guint gdk_display_get_default_cursor_size (GdkDisplay *display) { g_return_val_if_fail (GDK_IS_DISPLAY (display), 0); /* no idea, really */ return 20; } #endif /** * gdk_display_get_maximal_cursor_size: * @display: a #GdkDisplay * @width: (out): the return location for the maximal cursor width * @height: (out): the return location for the maximal cursor height * * Gets the maximal size to use for cursors on @display. * * Since: 2.4 */ void gdk_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_XWINDOW (window), 128, 128, width, height); }