/* 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 #include "gdkwindow.h" #include "gdkinternals.h" #include "gdk.h" /* For gdk_rectangle_union() */ #include "gdkpixmap.h" #include "gdkdrawable.h" #include "gdkscreen.h" #include "gdkalias.h" #define USE_BACKING_STORE /* Appears to work on Win32, too, now. */ typedef struct _GdkWindowPaint GdkWindowPaint; struct _GdkWindowPaint { GdkRegion *region; GdkPixmap *pixmap; gint x_offset; gint y_offset; cairo_surface_t *surface; }; static GdkGC *gdk_window_create_gc (GdkDrawable *drawable, GdkGCValues *values, GdkGCValuesMask mask); static void gdk_window_draw_rectangle (GdkDrawable *drawable, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height); static void gdk_window_draw_arc (GdkDrawable *drawable, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2); static void gdk_window_draw_polygon (GdkDrawable *drawable, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints); static void gdk_window_draw_text (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, gint x, gint y, const gchar *text, gint text_length); static void gdk_window_draw_text_wc (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, gint x, gint y, const GdkWChar *text, gint text_length); static void gdk_window_draw_drawable (GdkDrawable *drawable, GdkGC *gc, GdkPixmap *src, gint xsrc, gint ysrc, gint xdest, gint ydest, gint width, gint height); static void gdk_window_draw_points (GdkDrawable *drawable, GdkGC *gc, GdkPoint *points, gint npoints); static void gdk_window_draw_segments (GdkDrawable *drawable, GdkGC *gc, GdkSegment *segs, gint nsegs); static void gdk_window_draw_lines (GdkDrawable *drawable, GdkGC *gc, GdkPoint *points, gint npoints); static void gdk_window_draw_glyphs (GdkDrawable *drawable, GdkGC *gc, PangoFont *font, gint x, gint y, PangoGlyphString *glyphs); static void gdk_window_draw_glyphs_transformed (GdkDrawable *drawable, GdkGC *gc, PangoMatrix *matrix, PangoFont *font, gint x, gint y, PangoGlyphString *glyphs); static void gdk_window_draw_image (GdkDrawable *drawable, GdkGC *gc, GdkImage *image, gint xsrc, gint ysrc, gint xdest, gint ydest, gint width, gint height); static void gdk_window_draw_pixbuf (GdkDrawable *drawable, GdkGC *gc, GdkPixbuf *pixbuf, gint src_x, gint src_y, gint dest_x, gint dest_y, gint width, gint height, GdkRgbDither dither, gint x_dither, gint y_dither); static void gdk_window_draw_trapezoids (GdkDrawable *drawable, GdkGC *gc, GdkTrapezoid *trapezoids, gint n_trapezoids); static GdkImage* gdk_window_copy_to_image (GdkDrawable *drawable, GdkImage *image, gint src_x, gint src_y, gint dest_x, gint dest_y, gint width, gint height); static cairo_surface_t *gdk_window_ref_cairo_surface (GdkDrawable *drawable); static void gdk_window_real_get_size (GdkDrawable *drawable, gint *width, gint *height); static GdkVisual* gdk_window_real_get_visual (GdkDrawable *drawable); static gint gdk_window_real_get_depth (GdkDrawable *drawable); static GdkScreen* gdk_window_real_get_screen (GdkDrawable *drawable); static void gdk_window_real_set_colormap (GdkDrawable *drawable, GdkColormap *cmap); static GdkColormap* gdk_window_real_get_colormap (GdkDrawable *drawable); static GdkDrawable* gdk_window_get_composite_drawable (GdkDrawable *drawable, gint x, gint y, gint width, gint height, gint *composite_x_offset, gint *composite_y_offset); static GdkRegion* gdk_window_get_clip_region (GdkDrawable *drawable); static GdkRegion* gdk_window_get_visible_region (GdkDrawable *drawable); static void gdk_window_free_paint_stack (GdkWindow *window); static void gdk_window_init (GdkWindowObject *window); static void gdk_window_class_init (GdkWindowObjectClass *klass); static void gdk_window_finalize (GObject *object); static void gdk_window_clear_backing_rect (GdkWindow *window, gint x, gint y, gint width, gint height); static gpointer parent_class = NULL; GType gdk_window_object_get_type (void) { static GType object_type = 0; if (!object_type) object_type = g_type_register_static_simple (GDK_TYPE_DRAWABLE, "GdkWindow", sizeof (GdkWindowObjectClass), (GClassInitFunc) gdk_window_class_init, sizeof (GdkWindowObject), (GInstanceInitFunc) gdk_window_init, 0); return object_type; } GType _gdk_paintable_get_type (void) { static GType paintable_type = 0; if (!paintable_type) { const GTypeInfo paintable_info = { sizeof (GdkPaintableIface), /* class_size */ NULL, /* base_init */ NULL, /* base_finalize */ }; paintable_type = g_type_register_static (G_TYPE_INTERFACE, g_intern_static_string ("GdkPaintable"), &paintable_info, 0); g_type_interface_add_prerequisite (paintable_type, G_TYPE_OBJECT); } return paintable_type; } static void gdk_window_init (GdkWindowObject *window) { /* 0-initialization is good for all other fields. */ window->window_type = GDK_WINDOW_CHILD; window->state = GDK_WINDOW_STATE_WITHDRAWN; window->impl = g_object_new (_gdk_window_impl_get_type (), NULL); } static void gdk_window_class_init (GdkWindowObjectClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass); parent_class = g_type_class_peek_parent (klass); object_class->finalize = gdk_window_finalize; drawable_class->create_gc = gdk_window_create_gc; drawable_class->draw_rectangle = gdk_window_draw_rectangle; drawable_class->draw_arc = gdk_window_draw_arc; drawable_class->draw_polygon = gdk_window_draw_polygon; drawable_class->draw_text = gdk_window_draw_text; drawable_class->draw_text_wc = gdk_window_draw_text_wc; drawable_class->draw_drawable = gdk_window_draw_drawable; drawable_class->draw_points = gdk_window_draw_points; drawable_class->draw_segments = gdk_window_draw_segments; drawable_class->draw_lines = gdk_window_draw_lines; drawable_class->draw_glyphs = gdk_window_draw_glyphs; drawable_class->draw_glyphs_transformed = gdk_window_draw_glyphs_transformed; drawable_class->draw_image = gdk_window_draw_image; drawable_class->draw_pixbuf = gdk_window_draw_pixbuf; drawable_class->draw_trapezoids = gdk_window_draw_trapezoids; drawable_class->get_depth = gdk_window_real_get_depth; drawable_class->get_screen = gdk_window_real_get_screen; drawable_class->get_size = gdk_window_real_get_size; drawable_class->set_colormap = gdk_window_real_set_colormap; drawable_class->get_colormap = gdk_window_real_get_colormap; drawable_class->get_visual = gdk_window_real_get_visual; drawable_class->_copy_to_image = gdk_window_copy_to_image; drawable_class->ref_cairo_surface = gdk_window_ref_cairo_surface; drawable_class->get_clip_region = gdk_window_get_clip_region; drawable_class->get_visible_region = gdk_window_get_visible_region; drawable_class->get_composite_drawable = gdk_window_get_composite_drawable; } static void gdk_window_finalize (GObject *object) { GdkWindow *window = GDK_WINDOW (object); GdkWindowObject *obj = (GdkWindowObject *) object; if (!GDK_WINDOW_DESTROYED (window)) { if (GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN) { g_warning ("losing last reference to undestroyed window\n"); _gdk_window_destroy (window, FALSE); } else /* We use TRUE here, to keep us from actually calling * XDestroyWindow() on the window */ _gdk_window_destroy (window, TRUE); } g_object_unref (obj->impl); obj->impl = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static void window_remove_filters (GdkWindow *window) { GdkWindowObject *obj = (GdkWindowObject*) window; if (obj->filters) { GList *tmp_list; for (tmp_list = obj->filters; tmp_list; tmp_list = tmp_list->next) g_free (tmp_list->data); g_list_free (obj->filters); obj->filters = NULL; } } /** * _gdk_window_destroy_hierarchy: * @window: a #GdkWindow * @recursing: If TRUE, then this is being called because a parent * was destroyed. This generally means that the call to the * windowing system to destroy the window can be omitted, since * it will be destroyed as a result of the parent being destroyed. * Unless @foreign_destroy. * @foreign_destroy: If TRUE, the window or a parent was destroyed by some * external agency. The window has already been destroyed and no * windowing system calls should be made. (This may never happen * for some windowing systems.) * * Internal function to destroy a window. Like gdk_window_destroy(), * but does not drop the reference count created by gdk_window_new(). **/ static void _gdk_window_destroy_hierarchy (GdkWindow *window, gboolean recursing, gboolean foreign_destroy) { GdkWindowObject *private; GdkWindowObject *temp_private; GdkWindow *temp_window; GdkScreen *screen; GList *children; GList *tmp; g_return_if_fail (window != NULL); private = (GdkWindowObject*) window; if (GDK_WINDOW_DESTROYED (window)) return; switch (GDK_WINDOW_TYPE (window)) { case GDK_WINDOW_ROOT: screen = gdk_drawable_get_screen (GDK_DRAWABLE (window)); if (!screen->closed) { g_error ("attempted to destroy root window"); break; } /* else fall thru */ case GDK_WINDOW_TOPLEVEL: case GDK_WINDOW_CHILD: case GDK_WINDOW_DIALOG: case GDK_WINDOW_TEMP: case GDK_WINDOW_FOREIGN: if (GDK_WINDOW_TYPE (window) == GDK_WINDOW_FOREIGN && !foreign_destroy) { /* Logically, it probably makes more sense to send * a "destroy yourself" message to the foreign window * whether or not it's in our heirarchy; but for historical * reasons, we only send "destroy yourself" messages to * foreign windows in our heirarchy. */ if (private->parent) _gdk_windowing_window_destroy_foreign (window); /* Also for historical reasons, we remove any filters * on a foreign window when it or a parent is destroyed; * this likely causes problems if two separate portions * of code are maintaining filter lists on a foreign window. */ window_remove_filters (window); } else { private->state |= GDK_WINDOW_STATE_WITHDRAWN; if (private->parent) { GdkWindowObject *parent_private = (GdkWindowObject *)private->parent; if (parent_private->children) parent_private->children = g_list_remove (parent_private->children, window); } _gdk_window_clear_update_area (window); gdk_window_free_paint_stack (window); if (private->bg_pixmap && private->bg_pixmap != GDK_PARENT_RELATIVE_BG && private->bg_pixmap != GDK_NO_BG) { g_object_unref (private->bg_pixmap); private->bg_pixmap = NULL; } if (GDK_WINDOW_TYPE (window) == GDK_WINDOW_FOREIGN) g_assert (private->children == NULL); else { children = tmp = private->children; private->children = NULL; while (tmp) { temp_window = tmp->data; tmp = tmp->next; temp_private = (GdkWindowObject*) temp_window; if (temp_private) _gdk_window_destroy_hierarchy (temp_window, TRUE, foreign_destroy); } g_list_free (children); } _gdk_windowing_window_destroy (window, recursing, foreign_destroy); private->parent = NULL; private->destroyed = TRUE; window_remove_filters (window); gdk_drawable_set_colormap (GDK_DRAWABLE (window), NULL); } break; } } /** * _gdk_window_destroy: * @window: a #GdkWindow * @foreign_destroy: If TRUE, the window or a parent was destroyed by some * external agency. The window has already been destroyed and no * windowing system calls should be made. (This may never happen * for some windowing systems.) * * Internal function to destroy a window. Like gdk_window_destroy(), * but does not drop the reference count created by gdk_window_new(). **/ void _gdk_window_destroy (GdkWindow *window, gboolean foreign_destroy) { _gdk_window_destroy_hierarchy (window, FALSE, foreign_destroy); } /** * gdk_window_destroy: * @window: a #GdkWindow * * Destroys the window system resources associated with @window and decrements @window's * reference count. The window system resources for all children of @window are also * destroyed, but the children's reference counts are not decremented. * * Note that a window will not be destroyed automatically when its reference count * reaches zero. You must call this function yourself before that happens. * **/ void gdk_window_destroy (GdkWindow *window) { _gdk_window_destroy_hierarchy (window, FALSE, FALSE); g_object_unref (window); } /** * gdk_window_set_user_data: * @window: a #GdkWindow * @user_data: user data * * For most purposes this function is deprecated in favor of * g_object_set_data(). However, for historical reasons GTK+ stores * the #GtkWidget that owns a #GdkWindow as user data on the * #GdkWindow. So, custom widget implementations should use * this function for that. If GTK+ receives an event for a #GdkWindow, * and the user data for the window is non-%NULL, GTK+ will assume the * user data is a #GtkWidget, and forward the event to that widget. * **/ void gdk_window_set_user_data (GdkWindow *window, gpointer user_data) { g_return_if_fail (window != NULL); ((GdkWindowObject*)window)->user_data = user_data; } /** * gdk_window_get_user_data: * @window: a #GdkWindow * @data: return location for user data * * Retrieves the user data for @window, which is normally the widget * that @window belongs to. See gdk_window_set_user_data(). * **/ void gdk_window_get_user_data (GdkWindow *window, gpointer *data) { g_return_if_fail (window != NULL); *data = ((GdkWindowObject*)window)->user_data; } /** * gdk_window_get_window_type: * @window: a #GdkWindow * * Gets the type of the window. See #GdkWindowType. * * Return value: type of window **/ GdkWindowType gdk_window_get_window_type (GdkWindow *window) { g_return_val_if_fail (GDK_IS_WINDOW (window), (GdkWindowType) -1); return GDK_WINDOW_TYPE (window); } /** * gdk_window_get_position: * @window: a #GdkWindow * @x: X coordinate of window * @y: Y coordinate of window * * Obtains the position of the window as reported in the * most-recently-processed #GdkEventConfigure. Contrast with * gdk_window_get_geometry() which queries the X server for the * current window position, regardless of which events have been * received or processed. * * The position coordinates are relative to the window's parent window. * **/ void gdk_window_get_position (GdkWindow *window, gint *x, gint *y) { GdkWindowObject *obj; g_return_if_fail (GDK_IS_WINDOW (window)); obj = (GdkWindowObject*) window; if (x) *x = obj->x; if (y) *y = obj->y; } /** * gdk_window_get_parent: * @window: a #GdkWindow * * Obtains the parent of @window, as known to GDK. Does not query the * X server; thus this returns the parent as passed to gdk_window_new(), * not the actual parent. This should never matter unless you're using * Xlib calls mixed with GDK calls on the X11 platform. It may also * matter for toplevel windows, because the window manager may choose * to reparent them. * * Return value: parent of @window **/ GdkWindow* gdk_window_get_parent (GdkWindow *window) { g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); return (GdkWindow*) ((GdkWindowObject*) window)->parent; } /** * gdk_window_get_toplevel: * @window: a #GdkWindow * * Gets the toplevel window that's an ancestor of @window. * * Return value: the toplevel window containing @window **/ GdkWindow* gdk_window_get_toplevel (GdkWindow *window) { GdkWindowObject *obj; g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); obj = (GdkWindowObject *)window; while (GDK_WINDOW_TYPE (obj) == GDK_WINDOW_CHILD) obj = (GdkWindowObject *)obj->parent; return GDK_WINDOW (obj); } /** * gdk_window_get_children: * @window: a #GdkWindow * * Gets the list of children of @window known to GDK. * This function only returns children created via GDK, * so for example it's useless when used with the root window; * it only returns windows an application created itself. * * The returned list must be freed, but the elements in the * list need not be. * * Return value: list of child windows inside @window **/ GList* gdk_window_get_children (GdkWindow *window) { g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); if (GDK_WINDOW_DESTROYED (window)) return NULL; return g_list_copy (GDK_WINDOW_OBJECT (window)->children); } /** * gdk_window_peek_children: * @window: a #GdkWindow * * Like gdk_window_get_children(), but does not copy the list of * children, so the list does not need to be freed. * * Return value: a reference to the list of child windows in @window **/ GList * gdk_window_peek_children (GdkWindow *window) { g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); if (GDK_WINDOW_DESTROYED (window)) return NULL; return GDK_WINDOW_OBJECT (window)->children; } /** * gdk_window_add_filter: * @window: a #GdkWindow * @function: filter callback * @data: data to pass to filter callback * * Adds an event filter to @window, allowing you to intercept events * before they reach GDK. This is a low-level operation and makes it * easy to break GDK and/or GTK+, so you have to know what you're * doing. Pass %NULL for @window to get all events for all windows, * instead of events for a specific window. * * See gdk_display_add_client_message_filter() if you are interested * in X ClientMessage events. **/ void gdk_window_add_filter (GdkWindow *window, GdkFilterFunc function, gpointer data) { GdkWindowObject *private; GList *tmp_list; GdkEventFilter *filter; g_return_if_fail (window == NULL || GDK_IS_WINDOW (window)); private = (GdkWindowObject*) window; if (private && GDK_WINDOW_DESTROYED (window)) return; if (private) tmp_list = private->filters; else tmp_list = _gdk_default_filters; while (tmp_list) { filter = (GdkEventFilter *)tmp_list->data; if ((filter->function == function) && (filter->data == data)) return; tmp_list = tmp_list->next; } filter = g_new (GdkEventFilter, 1); filter->function = function; filter->data = data; if (private) private->filters = g_list_append (private->filters, filter); else _gdk_default_filters = g_list_append (_gdk_default_filters, filter); } /** * gdk_window_remove_filter: * @window: a #GdkWindow * @function: previously-added filter function * @data: user data for previously-added filter function * * Remove a filter previously added with gdk_window_add_filter(). * **/ void gdk_window_remove_filter (GdkWindow *window, GdkFilterFunc function, gpointer data) { GdkWindowObject *private; GList *tmp_list, *node; GdkEventFilter *filter; g_return_if_fail (window == NULL || GDK_IS_WINDOW (window)); private = (GdkWindowObject*) window; if (private) tmp_list = private->filters; else tmp_list = _gdk_default_filters; while (tmp_list) { filter = (GdkEventFilter *)tmp_list->data; node = tmp_list; tmp_list = tmp_list->next; if ((filter->function == function) && (filter->data == data)) { if (private) private->filters = g_list_remove_link (private->filters, node); else _gdk_default_filters = g_list_remove_link (_gdk_default_filters, node); g_list_free_1 (node); g_free (filter); return; } } } /** * gdk_screen_get_toplevel_windows: * @screen: The #GdkScreen where the toplevels are located. * * Obtains a list of all toplevel windows known to GDK on the screen @screen. * A toplevel window is a child of the root window (see * gdk_get_default_root_window()). * * The returned list should be freed with g_list_free(), but * its elements need not be freed. * * Return value: list of toplevel windows, free with g_list_free() * * Since: 2.2 **/ GList * gdk_screen_get_toplevel_windows (GdkScreen *screen) { GdkWindow * root_window; GList *new_list = NULL; GList *tmp_list; g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL); root_window = gdk_screen_get_root_window (screen); tmp_list = ((GdkWindowObject *)root_window)->children; while (tmp_list) { if (GDK_WINDOW_TYPE (tmp_list->data) != GDK_WINDOW_FOREIGN) new_list = g_list_prepend (new_list, tmp_list->data); tmp_list = tmp_list->next; } return new_list; } /** * gdk_window_get_toplevels: * * Obtains a list of all toplevel windows known to GDK on the default * screen (see gdk_screen_get_toplevel_windows()). * A toplevel window is a child of the root window (see * gdk_get_default_root_window()). * * The returned list should be freed with g_list_free(), but * its elements need not be freed. * * Return value: list of toplevel windows, free with g_list_free() **/ GList * gdk_window_get_toplevels (void) { return gdk_screen_get_toplevel_windows (gdk_screen_get_default ()); } /** * gdk_window_is_visible: * @window: a #GdkWindow * * Checks whether the window has been mapped (with gdk_window_show() or * gdk_window_show_unraised()). * * Return value: %TRUE if the window is mapped **/ gboolean gdk_window_is_visible (GdkWindow *window) { g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE); return GDK_WINDOW_IS_MAPPED (window); } /** * gdk_window_is_viewable: * @window: a #GdkWindow * * Check if the window and all ancestors of the window are * mapped. (This is not necessarily "viewable" in the X sense, since * we only check as far as we have GDK window parents, not to the root * window.) * * Return value: %TRUE if the window is viewable **/ gboolean gdk_window_is_viewable (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; GdkScreen *screen; GdkWindow *root_window; g_return_val_if_fail (window != NULL, FALSE); g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE); screen = gdk_drawable_get_screen (window); root_window = gdk_screen_get_root_window (screen); while (private && (private != (GdkWindowObject *)root_window) && (GDK_WINDOW_TYPE (private) != GDK_WINDOW_FOREIGN)) { if (GDK_WINDOW_DESTROYED (private) || !GDK_WINDOW_IS_MAPPED (private)) return FALSE; private = (GdkWindowObject *)private->parent; } return TRUE; } /** * gdk_window_get_state: * @window: a #GdkWindow * * Gets the bitwise OR of the currently active window state flags, * from the #GdkWindowState enumeration. * * Return value: window state bitfield **/ GdkWindowState gdk_window_get_state (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_val_if_fail (GDK_IS_WINDOW (window), FALSE); return private->state; } /** * gdk_window_begin_paint_rect: * @window: a #GdkWindow * @rectangle: rectangle you intend to draw to * * A convenience wrapper around gdk_window_begin_paint_region() which * creates a rectangular region for you. See * gdk_window_begin_paint_region() for details. * **/ void gdk_window_begin_paint_rect (GdkWindow *window, GdkRectangle *rectangle) { GdkRegion *region; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); region = gdk_region_rectangle (rectangle); gdk_window_begin_paint_region (window, region); gdk_region_destroy (region); } #ifdef GDK_WINDOWING_X11 #include "x11/gdkx.h" #endif /** * gdk_window_begin_paint_region: * @window: a #GdkWindow * @region: region you intend to draw to * * Indicates that you are beginning the process of redrawing @region. * A backing store (offscreen buffer) large enough to contain @region * will be created. The backing store will be initialized with the * background color or background pixmap for @window. Then, all * drawing operations performed on @window will be diverted to the * backing store. When you call gdk_window_end_paint(), the backing * store will be copied to @window, making it visible onscreen. Only * the part of @window contained in @region will be modified; that is, * drawing operations are clipped to @region. * * The net result of all this is to remove flicker, because the user * sees the finished product appear all at once when you call * gdk_window_end_paint(). If you draw to @window directly without * calling gdk_window_begin_paint_region(), the user may see flicker * as individual drawing operations are performed in sequence. The * clipping and background-initializing features of * gdk_window_begin_paint_region() are conveniences for the * programmer, so you can avoid doing that work yourself. * * When using GTK+, the widget system automatically places calls to * gdk_window_begin_paint_region() and gdk_window_end_paint() around * emissions of the expose_event signal. That is, if you're writing an * expose event handler, you can assume that the exposed area in * #GdkEventExpose has already been cleared to the window background, * is already set as the clip region, and already has a backing store. * Therefore in most cases, application code need not call * gdk_window_begin_paint_region(). (You can disable the automatic * calls around expose events on a widget-by-widget basis by calling * gtk_widget_set_double_buffered().) * * If you call this function multiple times before calling the * matching gdk_window_end_paint(), the backing stores are pushed onto * a stack. gdk_window_end_paint() copies the topmost backing store * onscreen, subtracts the topmost region from all other regions in * the stack, and pops the stack. All drawing operations affect only * the topmost backing store in the stack. One matching call to * gdk_window_end_paint() is required for each call to * gdk_window_begin_paint_region(). * **/ void gdk_window_begin_paint_region (GdkWindow *window, GdkRegion *region) { #ifdef USE_BACKING_STORE GdkWindowObject *private = (GdkWindowObject *)window; GdkRectangle clip_box; GdkWindowPaint *paint; GSList *list; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (GDK_WINDOW_DESTROYED (window)) return; if (GDK_IS_PAINTABLE (private->impl)) { GdkPaintableIface *iface = GDK_PAINTABLE_GET_IFACE (private->impl); if (iface->begin_paint_region) iface->begin_paint_region ((GdkPaintable*)private->impl, region); return; } gdk_region_get_clipbox (region, &clip_box); paint = g_new (GdkWindowPaint, 1); paint->region = gdk_region_copy (region); paint->x_offset = clip_box.x; paint->y_offset = clip_box.y; paint->pixmap = gdk_pixmap_new (window, MAX (clip_box.width, 1), MAX (clip_box.height, 1), -1); paint->surface = _gdk_drawable_ref_cairo_surface (paint->pixmap); cairo_surface_set_device_offset (paint->surface, - paint->x_offset, - paint->y_offset); for (list = private->paint_stack; list != NULL; list = list->next) { GdkWindowPaint *tmp_paint = list->data; gdk_region_subtract (tmp_paint->region, paint->region); } private->paint_stack = g_slist_prepend (private->paint_stack, paint); if (!gdk_region_empty (region)) { gdk_window_clear_backing_rect (window, clip_box.x, clip_box.y, clip_box.width, clip_box.height); } #endif /* USE_BACKING_STORE */ } /** * gdk_window_end_paint: * @window: a #GdkWindow * * Indicates that the backing store created by the most recent call to * gdk_window_begin_paint_region() should be copied onscreen and * deleted, leaving the next-most-recent backing store or no backing * store at all as the active paint region. See * gdk_window_begin_paint_region() for full details. It is an error to * call this function without a matching * gdk_window_begin_paint_region() first. * **/ void gdk_window_end_paint (GdkWindow *window) { #ifdef USE_BACKING_STORE GdkWindowObject *private = (GdkWindowObject *)window; GdkWindowObject *composited; GdkWindowPaint *paint; GdkGC *tmp_gc; GdkRectangle clip_box; gint x_offset, y_offset; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (GDK_WINDOW_DESTROYED (window)) return; if (GDK_IS_PAINTABLE (private->impl)) { GdkPaintableIface *iface = GDK_PAINTABLE_GET_IFACE (private->impl); if (iface->end_paint) iface->end_paint ((GdkPaintable*)private->impl); return; } if (private->paint_stack == NULL) { g_warning (G_STRLOC": no preceding call to gdk_window_begin_paint_region(), see documentation"); return; } paint = private->paint_stack->data; private->paint_stack = g_slist_delete_link (private->paint_stack, private->paint_stack); gdk_region_get_clipbox (paint->region, &clip_box); tmp_gc = _gdk_drawable_get_scratch_gc (window, FALSE); _gdk_windowing_window_get_offsets (window, &x_offset, &y_offset); gdk_gc_set_clip_region (tmp_gc, paint->region); gdk_gc_set_clip_origin (tmp_gc, - x_offset, - y_offset); gdk_draw_drawable (private->impl, tmp_gc, paint->pixmap, clip_box.x - paint->x_offset, clip_box.y - paint->y_offset, clip_box.x - x_offset, clip_box.y - y_offset, clip_box.width, clip_box.height); /* Reset clip region of the cached GdkGC */ gdk_gc_set_clip_region (tmp_gc, NULL); cairo_surface_destroy (paint->surface); g_object_unref (paint->pixmap); gdk_region_destroy (paint->region); g_free (paint); /* find a composited window in our hierarchy to signal its * parent to redraw, calculating the clip box as we go... * * stop if parent becomes NULL since then we'd have nowhere * to draw (ie: 'composited' will always be non-NULL here). */ for (composited = private; composited->parent; composited = composited->parent) { int width, height; gdk_drawable_get_size (GDK_DRAWABLE (composited->parent), &width, &height); clip_box.x += composited->x; clip_box.y += composited->y; clip_box.width = MIN (clip_box.width, width - clip_box.x); clip_box.height = MIN (clip_box.height, height - clip_box.y); if (composited->composited) { gdk_window_invalidate_rect (GDK_WINDOW (composited->parent), &clip_box, FALSE); break; } } #endif /* USE_BACKING_STORE */ } static void gdk_window_free_paint_stack (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; if (private->paint_stack) { GSList *tmp_list = private->paint_stack; while (tmp_list) { GdkWindowPaint *paint = tmp_list->data; if (tmp_list == private->paint_stack) g_object_unref (paint->pixmap); gdk_region_destroy (paint->region); g_free (paint); tmp_list = tmp_list->next; } g_slist_free (private->paint_stack); private->paint_stack = NULL; } } static void gdk_window_get_offsets (GdkWindow *window, gint *x_offset, gint *y_offset) { GdkWindowObject *private = (GdkWindowObject *)window; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; *x_offset = paint->x_offset; *y_offset = paint->y_offset; } else _gdk_windowing_window_get_offsets (window, x_offset, y_offset); } /** * gdk_window_get_internal_paint_info: * @window: a #GdkWindow * @real_drawable: location to store the drawable to which drawing should be * done. * @x_offset: location to store the X offset between coordinates in @window, * and the underlying window system primitive coordinates for * *@real_drawable. * @y_offset: location to store the Y offset between coordinates in @window, * and the underlying window system primitive coordinates for * *@real_drawable. * * If you bypass the GDK layer and use windowing system primitives to * draw directly onto a #GdkWindow, then you need to deal with two * details: there may be an offset between GDK coordinates and windowing * system coordinates, and GDK may have redirected drawing to a offscreen * pixmap as the result of a gdk_window_begin_paint_region() calls. * This function allows retrieving the information you need to compensate * for these effects. * * This function exposes details of the GDK implementation, and is thus * likely to change in future releases of GDK. **/ void gdk_window_get_internal_paint_info (GdkWindow *window, GdkDrawable **real_drawable, gint *x_offset, gint *y_offset) { gint x_off, y_off; GdkWindowObject *private; g_return_if_fail (GDK_IS_WINDOW (window)); private = (GdkWindowObject *)window; if (real_drawable) { if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; *real_drawable = paint->pixmap; } else *real_drawable = window; } gdk_window_get_offsets (window, &x_off, &y_off); if (x_offset) *x_offset = x_off; if (y_offset) *y_offset = y_off; } #define OFFSET_GC(gc) \ gint x_offset, y_offset; \ gint old_clip_x = gc->clip_x_origin; \ gint old_clip_y = gc->clip_y_origin; \ gint old_ts_x = gc->ts_x_origin; \ gint old_ts_y = gc->ts_y_origin; \ gdk_window_get_offsets (drawable, &x_offset, &y_offset); \ if (x_offset != 0 || y_offset != 0) \ { \ gdk_gc_set_clip_origin (gc, old_clip_x - x_offset, \ old_clip_y - y_offset); \ gdk_gc_set_ts_origin (gc, old_ts_x - x_offset, \ old_ts_y - y_offset); \ } #define RESTORE_GC(gc) \ if (x_offset != 0 || y_offset != 0) \ { \ gdk_gc_set_clip_origin (gc, old_clip_x, old_clip_y); \ gdk_gc_set_ts_origin (gc, old_ts_x, old_ts_y); \ } static GdkGC * gdk_window_create_gc (GdkDrawable *drawable, GdkGCValues *values, GdkGCValuesMask mask) { g_return_val_if_fail (GDK_IS_WINDOW (drawable), NULL); if (GDK_WINDOW_DESTROYED (drawable)) return NULL; return gdk_gc_new_with_values (((GdkWindowObject *) drawable)->impl, values, mask); } static void gdk_window_draw_rectangle (GdkDrawable *drawable, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_rectangle (paint->pixmap, gc, filled, x - x_offset, y - y_offset, width, height); } else gdk_draw_rectangle (private->impl, gc, filled, x - x_offset, y - y_offset, width, height); RESTORE_GC (gc); } static void gdk_window_draw_arc (GdkDrawable *drawable, GdkGC *gc, gboolean filled, gint x, gint y, gint width, gint height, gint angle1, gint angle2) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_arc (paint->pixmap, gc, filled, x - x_offset, y - y_offset, width, height, angle1, angle2); } else gdk_draw_arc (private->impl, gc, filled, x - x_offset, y - y_offset, width, height, angle1, angle2); RESTORE_GC (gc); } static void gdk_window_draw_polygon (GdkDrawable *drawable, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkPoint *new_points; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { int i; new_points = g_new (GdkPoint, npoints); for (i=0; ipaint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_polygon (paint->pixmap, gc, filled, new_points, npoints); } else gdk_draw_polygon (private->impl, gc, filled, new_points, npoints); if (new_points != points) g_free (new_points); RESTORE_GC (gc); } static void gdk_window_draw_text (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, gint x, gint y, const gchar *text, gint text_length) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_text (paint->pixmap, font, gc, x - x_offset, y - y_offset, text, text_length); } else gdk_draw_text (private->impl, font, gc, x - x_offset, y - y_offset, text, text_length); RESTORE_GC (gc); } static void gdk_window_draw_text_wc (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, gint x, gint y, const GdkWChar *text, gint text_length) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_text_wc (paint->pixmap, font, gc, x - x_offset, y - y_offset, text, text_length); } else gdk_draw_text_wc (private->impl, font, gc, x - x_offset, y - y_offset, text, text_length); RESTORE_GC (gc); } static GdkDrawable* gdk_window_get_composite_drawable (GdkDrawable *drawable, gint x, gint y, gint width, gint height, gint *composite_x_offset, gint *composite_y_offset) { GdkWindowObject *private = (GdkWindowObject *)drawable; GSList *list; GdkPixmap *tmp_pixmap; GdkRectangle rect; GdkGC *tmp_gc; gboolean overlap_buffer; _gdk_windowing_window_get_offsets (drawable, composite_x_offset, composite_y_offset); if ((GDK_IS_WINDOW (drawable) && GDK_WINDOW_DESTROYED (drawable)) || private->paint_stack == NULL) { /* No backing store */ return g_object_ref (drawable); } /* See if the buffered part is overlapping the part we want * to get */ rect.x = x; rect.y = y; rect.width = width; rect.height = height; overlap_buffer = FALSE; for (list = private->paint_stack; list != NULL; list = list->next) { GdkWindowPaint *paint = list->data; GdkOverlapType overlap; overlap = gdk_region_rect_in (paint->region, &rect); if (overlap == GDK_OVERLAP_RECTANGLE_IN) { *composite_x_offset = paint->x_offset; *composite_y_offset = paint->y_offset; return g_object_ref (paint->pixmap); } else if (overlap == GDK_OVERLAP_RECTANGLE_PART) { overlap_buffer = TRUE; break; } } if (!overlap_buffer) return g_object_ref (drawable); tmp_pixmap = gdk_pixmap_new (drawable, width, height, -1); tmp_gc = _gdk_drawable_get_scratch_gc (tmp_pixmap, FALSE); /* Copy the current window contents */ gdk_draw_drawable (tmp_pixmap, tmp_gc, private->impl, x - *composite_x_offset, y - *composite_y_offset, 0, 0, width, height); /* paint the backing stores */ for (list = private->paint_stack; list != NULL; list = list->next) { GdkWindowPaint *paint = list->data; gdk_gc_set_clip_region (tmp_gc, paint->region); gdk_gc_set_clip_origin (tmp_gc, -x, -y); gdk_draw_drawable (tmp_pixmap, tmp_gc, paint->pixmap, x - paint->x_offset, y - paint->y_offset, 0, 0, width, height); } /* Reset clip region of the cached GdkGC */ gdk_gc_set_clip_region (tmp_gc, NULL); /* Set these to location of tmp_pixmap within the window */ *composite_x_offset = x; *composite_y_offset = y; return tmp_pixmap; } static GdkRegion* gdk_window_get_clip_region (GdkDrawable *drawable) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkRegion *result; result = gdk_drawable_get_clip_region (private->impl); if (private->paint_stack) { GdkRegion *paint_region = gdk_region_new (); GSList *tmp_list = private->paint_stack; while (tmp_list) { GdkWindowPaint *paint = tmp_list->data; gdk_region_union (paint_region, paint->region); tmp_list = tmp_list->next; } gdk_region_intersect (result, paint_region); gdk_region_destroy (paint_region); } return result; } static GdkRegion* gdk_window_get_visible_region (GdkDrawable *drawable) { GdkWindowObject *private = (GdkWindowObject*) drawable; return gdk_drawable_get_visible_region (private->impl); } static void gdk_window_draw_drawable (GdkDrawable *drawable, GdkGC *gc, GdkPixmap *src, gint xsrc, gint ysrc, gint xdest, gint ydest, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; /* If we have a backing pixmap draw to that */ if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_drawable (paint->pixmap, gc, src, xsrc, ysrc, xdest - x_offset, ydest - y_offset, width, height); } else gdk_draw_drawable (private->impl, gc, src, xsrc, ysrc, xdest - x_offset, ydest - y_offset, width, height); RESTORE_GC (gc); } static void gdk_window_draw_points (GdkDrawable *drawable, GdkGC *gc, GdkPoint *points, gint npoints) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkPoint *new_points; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { gint i; new_points = g_new (GdkPoint, npoints); for (i=0; ipaint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_points (paint->pixmap, gc, new_points, npoints); } else gdk_draw_points (private->impl, gc, points, npoints); if (new_points != points) g_free (new_points); RESTORE_GC (gc); } static void gdk_window_draw_segments (GdkDrawable *drawable, GdkGC *gc, GdkSegment *segs, gint nsegs) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkSegment *new_segs; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { gint i; new_segs = g_new (GdkSegment, nsegs); for (i=0; ipaint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_segments (paint->pixmap, gc, new_segs, nsegs); } else gdk_draw_segments (private->impl, gc, new_segs, nsegs); if (new_segs != segs) g_free (new_segs); RESTORE_GC (gc); } static void gdk_window_draw_lines (GdkDrawable *drawable, GdkGC *gc, GdkPoint *points, gint npoints) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkPoint *new_points; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { gint i; new_points = g_new (GdkPoint, npoints); for (i=0; ipaint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_lines (paint->pixmap, gc, new_points, npoints); } else gdk_draw_lines (private->impl, gc, new_points, npoints); if (new_points != points) g_free (new_points); RESTORE_GC (gc); } static void gdk_window_draw_glyphs (GdkDrawable *drawable, GdkGC *gc, PangoFont *font, gint x, gint y, PangoGlyphString *glyphs) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_glyphs (paint->pixmap, gc, font, x - x_offset, y - y_offset, glyphs); } else gdk_draw_glyphs (private->impl, gc, font, x - x_offset, y - y_offset, glyphs); RESTORE_GC (gc); } static void gdk_window_draw_glyphs_transformed (GdkDrawable *drawable, GdkGC *gc, PangoMatrix *matrix, PangoFont *font, gint x, gint y, PangoGlyphString *glyphs) { GdkWindowObject *private = (GdkWindowObject *)drawable; PangoMatrix tmp_matrix; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { if (matrix) { tmp_matrix = *matrix; tmp_matrix.x0 -= x_offset; tmp_matrix.y0 -= y_offset; matrix = &tmp_matrix; } else if (GDK_PANGO_UNITS_OVERFLOWS (x_offset, y_offset)) { PangoMatrix identity = PANGO_MATRIX_INIT; tmp_matrix = identity; tmp_matrix.x0 -= x_offset; tmp_matrix.y0 -= y_offset; matrix = &tmp_matrix; } else { x -= x_offset * PANGO_SCALE; y -= y_offset * PANGO_SCALE; } } if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_glyphs_transformed (paint->pixmap, gc, matrix, font, x, y, glyphs); } else gdk_draw_glyphs_transformed (private->impl, gc, matrix, font, x, y, glyphs); RESTORE_GC (gc); } typedef struct { cairo_t *cr; /* if non-null, it means use this cairo context */ GdkGC *gc; /* if non-null, it means use this GC instead */ } BackingRectMethod; static void setup_backing_rect_method (BackingRectMethod *method, GdkWindow *window, GdkWindowPaint *paint, int x_offset_cairo, int y_offset_cairo) { GdkWindowObject *private = (GdkWindowObject *)window; if (private->bg_pixmap == GDK_PARENT_RELATIVE_BG && private->parent) { GdkWindowPaint tmp_paint; tmp_paint = *paint; tmp_paint.x_offset += private->x; tmp_paint.y_offset += private->y; x_offset_cairo += private->x; y_offset_cairo += private->y; setup_backing_rect_method (method, GDK_WINDOW (private->parent), &tmp_paint, x_offset_cairo, y_offset_cairo); } else if (private->bg_pixmap && private->bg_pixmap != GDK_PARENT_RELATIVE_BG && private->bg_pixmap != GDK_NO_BG) { /* This is a workaround for https://bugs.freedesktop.org/show_bug.cgi?id=4320. * In it, using a pixmap as a repeating pattern in Cairo, and painting it to a * pixmap destination surface, can be very slow (on the order of seconds for a * whole-screen copy). The workaround is to use pretty much the same code that * we used in GTK+ 2.6 (pre-Cairo), which clears the double-buffer pixmap with * a tiled GC XFillRectangle(). */ /* Actually computing this flag is left as an exercise for the reader */ #if defined (G_OS_UNIX) # define GDK_CAIRO_REPEAT_IS_FAST 0 #else # define GDK_CAIRO_REPEAT_IS_FAST 1 #endif #if GDK_CAIRO_REPEAT_IS_FAST cairo_surface_t *surface = _gdk_drawable_ref_cairo_surface (private->bg_pixmap); cairo_pattern_t *pattern = cairo_pattern_create_for_surface (surface); cairo_surface_destroy (surface); if (x_offset_cairo != 0 || y_offset_cairo != 0) { cairo_matrix_t matrix; cairo_matrix_init_translate (&matrix, x_offset_cairo, y_offset_cairo); cairo_pattern_set_matrix (pattern, &matrix); } cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT); method->cr = cairo_create (paint->surface); method->gc = NULL; cairo_set_source (method->cr, pattern); cairo_pattern_destroy (pattern); #else guint gc_mask; GdkGCValues gc_values; gc_values.fill = GDK_TILED; gc_values.tile = private->bg_pixmap; gc_values.ts_x_origin = -x_offset_cairo; gc_values.ts_y_origin = -y_offset_cairo; gc_mask = GDK_GC_FILL | GDK_GC_TILE | GDK_GC_TS_X_ORIGIN | GDK_GC_TS_Y_ORIGIN; method->gc = gdk_gc_new_with_values (paint->pixmap, &gc_values, gc_mask); #endif } else { method->cr = cairo_create (paint->surface); gdk_cairo_set_source_color (method->cr, &private->bg_color); } } static void gdk_window_clear_backing_rect (GdkWindow *window, gint x, gint y, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)window; GdkWindowPaint *paint = private->paint_stack->data; BackingRectMethod method; #if 0 GTimer *timer; double elapsed; #endif if (GDK_WINDOW_DESTROYED (window)) return; #if 0 timer = g_timer_new (); #endif method.cr = NULL; method.gc = NULL; setup_backing_rect_method (&method, window, paint, 0, 0); if (method.cr) { g_assert (method.gc == NULL); cairo_rectangle (method.cr, x, y, width, height); cairo_clip (method.cr); gdk_cairo_region (method.cr, paint->region); cairo_fill (method.cr); cairo_destroy (method.cr); #if 0 elapsed = g_timer_elapsed (timer, NULL); g_print ("Draw the background with Cairo: %fs\n", elapsed); #endif } else { g_assert (method.gc != NULL); gdk_gc_set_clip_region (method.gc, paint->region); gdk_draw_rectangle (window, method.gc, TRUE, x, y, width, height); g_object_unref (method.gc); #if 0 elapsed = g_timer_elapsed (timer, NULL); g_print ("Draw the background with GDK: %fs\n", elapsed); #endif } #if 0 g_timer_destroy (timer); #endif } /** * gdk_window_clear: * @window: a #GdkWindow * * Clears an entire @window to the background color or background pixmap. **/ void gdk_window_clear (GdkWindow *window) { gint width, height; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); gdk_drawable_get_size (GDK_DRAWABLE (window), &width, &height); gdk_window_clear_area (window, 0, 0, width, height); } /** * gdk_window_clear_area: * @window: a #GdkWindow * @x: x coordinate of rectangle to clear * @y: y coordinate of rectangle to clear * @width: width of rectangle to clear * @height: height of rectangle to clear * * Clears an area of @window to the background color or background pixmap. * **/ void gdk_window_clear_area (GdkWindow *window, gint x, gint y, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (private->paint_stack) gdk_window_clear_backing_rect (window, x, y, width, height); else _gdk_windowing_window_clear_area (window, x, y, width, height); } /** * gdk_window_clear_area_e: * @window: a #GdkWindow * @x: x coordinate of rectangle to clear * @y: y coordinate of rectangle to clear * @width: width of rectangle to clear * @height: height of rectangle to clear * * Like gdk_window_clear_area(), but also generates an expose event for * the cleared area. * * This function has a stupid name because it dates back to the mists * time, pre-GDK-1.0. * **/ void gdk_window_clear_area_e (GdkWindow *window, gint x, gint y, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (private->paint_stack) gdk_window_clear_backing_rect (window, x, y, width, height); _gdk_windowing_window_clear_area_e (window, x, y, width, height); } static void gdk_window_draw_image (GdkDrawable *drawable, GdkGC *gc, GdkImage *image, gint xsrc, gint ysrc, gint xdest, gint ydest, gint width, gint height) { GdkWindowObject *private = (GdkWindowObject *)drawable; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_image (paint->pixmap, gc, image, xsrc, ysrc, xdest - x_offset, ydest - y_offset, width, height); } else gdk_draw_image (private->impl, gc, image, xsrc, ysrc, xdest - x_offset, ydest - y_offset, width, height); RESTORE_GC (gc); } static void gdk_window_draw_pixbuf (GdkDrawable *drawable, GdkGC *gc, GdkPixbuf *pixbuf, gint src_x, gint src_y, gint dest_x, gint dest_y, gint width, gint height, GdkRgbDither dither, gint x_dither, gint y_dither) { GdkWindowObject *private = (GdkWindowObject *)drawable; if (GDK_WINDOW_DESTROYED (drawable)) return; if (gc) { OFFSET_GC (gc); if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_pixbuf (paint->pixmap, gc, pixbuf, src_x, src_y, dest_x - x_offset, dest_y - y_offset, width, height, dither, x_dither - x_offset, y_dither - y_offset); } else gdk_draw_pixbuf (private->impl, gc, pixbuf, src_x, src_y, dest_x - x_offset, dest_y - y_offset, width, height, dither, x_dither, y_dither); RESTORE_GC (gc); } else { gint x_offset, y_offset; gdk_window_get_offsets (drawable, &x_offset, &y_offset); if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_pixbuf (paint->pixmap, gc, pixbuf, src_x, src_y, dest_x - x_offset, dest_y - y_offset, width, height, dither, x_dither - x_offset, y_dither - y_offset); } else gdk_draw_pixbuf (private->impl, gc, pixbuf, src_x, src_y, dest_x - x_offset, dest_y - y_offset, width, height, dither, x_dither, y_dither); } } static void gdk_window_draw_trapezoids (GdkDrawable *drawable, GdkGC *gc, GdkTrapezoid *trapezoids, gint n_trapezoids) { GdkWindowObject *private = (GdkWindowObject *)drawable; GdkTrapezoid *new_trapezoids = NULL; OFFSET_GC (gc); if (GDK_WINDOW_DESTROYED (drawable)) return; if (x_offset != 0 || y_offset != 0) { gint i; new_trapezoids = g_new (GdkTrapezoid, n_trapezoids); for (i=0; i < n_trapezoids; i++) { new_trapezoids[i].y1 = trapezoids[i].y1 - y_offset; new_trapezoids[i].x11 = trapezoids[i].x11 - x_offset; new_trapezoids[i].x21 = trapezoids[i].x21 - x_offset; new_trapezoids[i].y2 = trapezoids[i].y2 - y_offset; new_trapezoids[i].x12 = trapezoids[i].x12 - x_offset; new_trapezoids[i].x22 = trapezoids[i].x22 - x_offset; } trapezoids = new_trapezoids; } if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; gdk_draw_trapezoids (paint->pixmap, gc, trapezoids, n_trapezoids); } else gdk_draw_trapezoids (private->impl, gc, trapezoids, n_trapezoids); g_free (new_trapezoids); RESTORE_GC (gc); } static void gdk_window_real_get_size (GdkDrawable *drawable, gint *width, gint *height) { g_return_if_fail (GDK_IS_WINDOW (drawable)); gdk_drawable_get_size (GDK_WINDOW_OBJECT (drawable)->impl, width, height); } static GdkVisual* gdk_window_real_get_visual (GdkDrawable *drawable) { GdkColormap *colormap; g_return_val_if_fail (GDK_IS_WINDOW (drawable), NULL); colormap = gdk_drawable_get_colormap (drawable); return colormap ? gdk_colormap_get_visual (colormap) : NULL; } static gint gdk_window_real_get_depth (GdkDrawable *drawable) { g_return_val_if_fail (GDK_IS_WINDOW (drawable), 0); return ((GdkWindowObject *)GDK_WINDOW (drawable))->depth; } static GdkScreen* gdk_window_real_get_screen (GdkDrawable *drawable) { return gdk_drawable_get_screen (GDK_WINDOW_OBJECT (drawable)->impl); } static void gdk_window_real_set_colormap (GdkDrawable *drawable, GdkColormap *cmap) { g_return_if_fail (GDK_IS_WINDOW (drawable)); if (GDK_WINDOW_DESTROYED (drawable)) return; gdk_drawable_set_colormap (((GdkWindowObject*)drawable)->impl, cmap); } static GdkColormap* gdk_window_real_get_colormap (GdkDrawable *drawable) { g_return_val_if_fail (GDK_IS_WINDOW (drawable), NULL); if (GDK_WINDOW_DESTROYED (drawable)) return NULL; return gdk_drawable_get_colormap (((GdkWindowObject*)drawable)->impl); } static GdkImage* gdk_window_copy_to_image (GdkDrawable *drawable, GdkImage *image, gint src_x, gint src_y, gint dest_x, gint dest_y, gint width, gint height) { gint x_offset, y_offset; g_return_val_if_fail (GDK_IS_WINDOW (drawable), NULL); if (GDK_WINDOW_DESTROYED (drawable)) return NULL; /* If we're here, a composite image was not necessary, so * we can ignore the paint stack. */ _gdk_windowing_window_get_offsets (drawable, &x_offset, &y_offset); return gdk_drawable_copy_to_image (((GdkWindowObject*)drawable)->impl, image, src_x - x_offset, src_y - y_offset, dest_x, dest_y, width, height); } static cairo_surface_t * gdk_window_ref_cairo_surface (GdkDrawable *drawable) { GdkWindowObject *private = (GdkWindowObject*) drawable; cairo_surface_t *surface; if (private->paint_stack) { GdkWindowPaint *paint = private->paint_stack->data; surface = paint->surface; cairo_surface_reference (surface); } else surface = _gdk_drawable_ref_cairo_surface (private->impl); return surface; } /* Code for dirty-region queueing */ static GSList *update_windows = NULL; static guint update_idle = 0; static gboolean debug_updates = FALSE; static gboolean gdk_window_update_idle (gpointer data) { gdk_window_process_all_updates (); return FALSE; } static void gdk_window_schedule_update (GdkWindow *window) { if (window && GDK_WINDOW_OBJECT (window)->update_freeze_count) return; if (!update_idle) { update_idle = gdk_threads_add_idle_full (GDK_PRIORITY_REDRAW, gdk_window_update_idle, NULL, NULL); } } static void gdk_window_process_updates_internal (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; gboolean save_region = FALSE; /* If an update got queued during update processing, we can get a * window in the update queue that has an empty update_area. * just ignore it. */ if (private->update_area) { GdkRegion *update_area = private->update_area; private->update_area = NULL; if (_gdk_event_func && gdk_window_is_viewable (window)) { GdkRectangle window_rect; GdkRegion *expose_region; GdkRegion *window_region; gint width, height; if (debug_updates) { /* Make sure we see the red invalid area before redrawing. */ gdk_display_sync (gdk_drawable_get_display (window)); g_usleep (70000); } save_region = _gdk_windowing_window_queue_antiexpose (window, update_area); if (save_region) expose_region = gdk_region_copy (update_area); else expose_region = update_area; gdk_drawable_get_size (GDK_DRAWABLE (private), &width, &height); window_rect.x = 0; window_rect.y = 0; window_rect.width = width; window_rect.height = height; window_region = gdk_region_rectangle (&window_rect); gdk_region_intersect (expose_region, window_region); gdk_region_destroy (window_region); if (!gdk_region_empty (expose_region) && (private->event_mask & GDK_EXPOSURE_MASK)) { GdkEvent event; event.expose.type = GDK_EXPOSE; event.expose.window = g_object_ref (window); event.expose.send_event = FALSE; event.expose.count = 0; event.expose.region = expose_region; gdk_region_get_clipbox (expose_region, &event.expose.area); (*_gdk_event_func) (&event, _gdk_event_data); g_object_unref (window); } if (expose_region != update_area) gdk_region_destroy (expose_region); } if (!save_region) gdk_region_destroy (update_area); } } static void flush_all_displays (void) { GSList *displays = gdk_display_manager_list_displays (gdk_display_manager_get ()); GSList *tmp_list; for (tmp_list = displays; tmp_list; tmp_list = tmp_list->next) gdk_display_flush (tmp_list->data); g_slist_free (displays); } /* Currently it is not possible to override * gdk_window_process_all_updates in the same manner as * gdk_window_process_updates and gdk_window_invalidate_maybe_recurse * by implementing the GdkPaintable interface. If in the future a * backend would need this, the right solution would be to add a * method to GdkDisplay that can be optionally * NULL. gdk_window_process_all_updates can then walk the list of open * displays and call the mehod. */ /** * gdk_window_process_all_updates: * * Calls gdk_window_process_updates() for all windows (see #GdkWindow) * in the application. * **/ void gdk_window_process_all_updates (void) { GSList *old_update_windows = update_windows; GSList *tmp_list = update_windows; if (update_idle) g_source_remove (update_idle); update_windows = NULL; update_idle = 0; g_slist_foreach (old_update_windows, (GFunc)g_object_ref, NULL); while (tmp_list) { GdkWindowObject *private = (GdkWindowObject *)tmp_list->data; if (private->update_freeze_count) update_windows = g_slist_prepend (update_windows, private); else gdk_window_process_updates_internal (tmp_list->data); g_object_unref (tmp_list->data); tmp_list = tmp_list->next; } g_slist_free (old_update_windows); flush_all_displays (); } /** * gdk_window_process_updates: * @window: a #GdkWindow * @update_children: whether to also process updates for child windows * * Sends one or more expose events to @window. The areas in each * expose event will cover the entire update area for the window (see * gdk_window_invalidate_region() for details). Normally GDK calls * gdk_window_process_all_updates() on your behalf, so there's no * need to call this function unless you want to force expose events * to be delivered immediately and synchronously (vs. the usual * case, where GDK delivers them in an idle handler). Occasionally * this is useful to produce nicer scrolling behavior, for example. * **/ void gdk_window_process_updates (GdkWindow *window, gboolean update_children) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (GDK_IS_PAINTABLE (private->impl)) { GdkPaintableIface *iface = GDK_PAINTABLE_GET_IFACE (private->impl); if (iface->process_updates) iface->process_updates ((GdkPaintable*)private->impl, update_children); return; } if (private->update_area && !private->update_freeze_count) { gdk_window_process_updates_internal (window); update_windows = g_slist_remove (update_windows, window); } if (update_children) { GList *tmp_list = private->children; while (tmp_list) { gdk_window_process_updates (tmp_list->data, TRUE); tmp_list = tmp_list->next; } } } /** * gdk_window_invalidate_rect: * @window: a #GdkWindow * @rect: rectangle to invalidate * @invalidate_children: whether to also invalidate child windows * * A convenience wrapper around gdk_window_invalidate_region() which * invalidates a rectangular region. See * gdk_window_invalidate_region() for details. * **/ void gdk_window_invalidate_rect (GdkWindow *window, GdkRectangle *rect, gboolean invalidate_children) { GdkRectangle window_rect; GdkRegion *region; GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (GDK_WINDOW_DESTROYED (window)) return; if (private->input_only || !GDK_WINDOW_IS_MAPPED (window)) return; if (!rect) { window_rect.x = 0; window_rect.y = 0; gdk_drawable_get_size (GDK_DRAWABLE (window), &window_rect.width, &window_rect.height); rect = &window_rect; } region = gdk_region_rectangle (rect); gdk_window_invalidate_region (window, region, invalidate_children); gdk_region_destroy (region); } static void draw_ugly_color (GdkWindow *window, GdkRegion *region) { /* Draw ugly color all over the newly-invalid region */ GdkColor ugly_color = { 0, 50000, 10000, 10000 }; GdkGC *ugly_gc; GdkRectangle clipbox; ugly_gc = gdk_gc_new (window); gdk_gc_set_rgb_fg_color (ugly_gc, &ugly_color); gdk_gc_set_clip_region (ugly_gc, region); gdk_region_get_clipbox (region, &clipbox); gdk_draw_rectangle (window, ugly_gc, TRUE, clipbox.x, clipbox.y, clipbox.width, clipbox.height); g_object_unref (ugly_gc); } /** * gdk_window_invalidate_maybe_recurse: * @window: a #GdkWindow * @region: a #GdkRegion * @child_func: function to use to decide if to recurse to a child, * %NULL means never recurse. * @user_data: data passed to @child_func * * Adds @region to the update area for @window. The update area is the * region that needs to be redrawn, or "dirty region." The call * gdk_window_process_updates() sends one or more expose events to the * window, which together cover the entire update area. An * application would normally redraw the contents of @window in * response to those expose events. * * GDK will call gdk_window_process_all_updates() on your behalf * whenever your program returns to the main loop and becomes idle, so * normally there's no need to do that manually, you just need to * invalidate regions that you know should be redrawn. * * The @child_func parameter controls whether the region of * each child window that intersects @region will also be invalidated. * Only children for which @child_func returns TRUE will have the area * invalidated. **/ void gdk_window_invalidate_maybe_recurse (GdkWindow *window, GdkRegion *region, gboolean (*child_func) (GdkWindow *, gpointer), gpointer user_data) { GdkWindowObject *private = (GdkWindowObject *)window; GdkRegion *visible_region; GList *tmp_list; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (GDK_WINDOW_DESTROYED (window)) return; if (private->input_only || !GDK_WINDOW_IS_MAPPED (window)) return; if (GDK_IS_PAINTABLE (private->impl)) { GdkPaintableIface *iface = GDK_PAINTABLE_GET_IFACE (private->impl); if (iface->invalidate_maybe_recurse) iface->invalidate_maybe_recurse ((GdkPaintable*)private->impl, region, child_func, user_data); return; } visible_region = gdk_drawable_get_visible_region (window); gdk_region_intersect (visible_region, region); tmp_list = private->children; while (tmp_list) { GdkWindowObject *child = tmp_list->data; if (!child->input_only) { GdkRegion *child_region; GdkRectangle child_rect; gdk_window_get_position ((GdkWindow *)child, &child_rect.x, &child_rect.y); gdk_drawable_get_size ((GdkDrawable *)child, &child_rect.width, &child_rect.height); child_region = gdk_region_rectangle (&child_rect); /* remove child area from the invalid area of the parent */ if (GDK_WINDOW_IS_MAPPED (child) && !child->shaped && !child->composited) gdk_region_subtract (visible_region, child_region); if (child_func && (*child_func) ((GdkWindow *)child, user_data)) { gdk_region_offset (region, - child_rect.x, - child_rect.y); gdk_region_offset (child_region, - child_rect.x, - child_rect.y); gdk_region_intersect (child_region, region); gdk_window_invalidate_maybe_recurse ((GdkWindow *)child, child_region, child_func, user_data); gdk_region_offset (region, child_rect.x, child_rect.y); } gdk_region_destroy (child_region); } tmp_list = tmp_list->next; } if (!gdk_region_empty (visible_region)) { if (debug_updates) draw_ugly_color (window, region); if (private->update_area) { gdk_region_union (private->update_area, visible_region); } else { update_windows = g_slist_prepend (update_windows, window); private->update_area = gdk_region_copy (visible_region); gdk_window_schedule_update (window); } } gdk_region_destroy (visible_region); } static gboolean true_predicate (GdkWindow *window, gpointer user_data) { return TRUE; } /** * gdk_window_invalidate_region: * @window: a #GdkWindow * @region: a #GdkRegion * @invalidate_children: %TRUE to also invalidate child windows * * Adds @region to the update area for @window. The update area is the * region that needs to be redrawn, or "dirty region." The call * gdk_window_process_updates() sends one or more expose events to the * window, which together cover the entire update area. An * application would normally redraw the contents of @window in * response to those expose events. * * GDK will call gdk_window_process_all_updates() on your behalf * whenever your program returns to the main loop and becomes idle, so * normally there's no need to do that manually, you just need to * invalidate regions that you know should be redrawn. * * The @invalidate_children parameter controls whether the region of * each child window that intersects @region will also be invalidated. * If %FALSE, then the update area for child windows will remain * unaffected. See gdk_window_invalidate_maybe_recurse if you need * fine grained control over which children are invalidated. **/ void gdk_window_invalidate_region (GdkWindow *window, GdkRegion *region, gboolean invalidate_children) { gdk_window_invalidate_maybe_recurse (window, region, invalidate_children ? true_predicate : (gboolean (*) (GdkWindow *, gpointer))NULL, NULL); } /** * gdk_window_get_update_area: * @window: a #GdkWindow * * Transfers ownership of the update area from @window to the caller * of the function. That is, after calling this function, @window will * no longer have an invalid/dirty region; the update area is removed * from @window and handed to you. If a window has no update area, * gdk_window_get_update_area() returns %NULL. You are responsible for * calling gdk_region_destroy() on the returned region if it's non-%NULL. * * Return value: the update area for @window **/ GdkRegion * gdk_window_get_update_area (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; GdkRegion *tmp_region; g_return_val_if_fail (window != NULL, NULL); g_return_val_if_fail (GDK_IS_WINDOW (window), NULL); if (private->update_area) { tmp_region = private->update_area; private->update_area = NULL; update_windows = g_slist_remove (update_windows, window); return tmp_region; } else return NULL; } /** * _gdk_window_clear_update_area: * @window: a #GdkWindow. * * Internal function to clear the update area for a window. This * is called when the window is hidden or destroyed. **/ void _gdk_window_clear_update_area (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); if (private->update_area) { update_windows = g_slist_remove (update_windows, window); gdk_region_destroy (private->update_area); private->update_area = NULL; } } /** * gdk_window_freeze_updates: * @window: a #GdkWindow * * Temporarily freezes a window such that it won't receive expose * events. The window will begin receiving expose events again when * gdk_window_thaw_updates() is called. If gdk_window_freeze_updates() * has been called more than once, gdk_window_thaw_updates() must be called * an equal number of times to begin processing exposes. **/ void gdk_window_freeze_updates (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); private->update_freeze_count++; } /** * gdk_window_thaw_updates: * @window: a #GdkWindow * * Thaws a window frozen with gdk_window_freeze_updates(). **/ void gdk_window_thaw_updates (GdkWindow *window) { GdkWindowObject *private = (GdkWindowObject *)window; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); g_return_if_fail (private->update_freeze_count > 0); if (--private->update_freeze_count == 0) gdk_window_schedule_update (window); } /** * gdk_window_set_debug_updates: * @setting: %TRUE to turn on update debugging * * With update debugging enabled, calls to * gdk_window_invalidate_region() clear the invalidated region of the * screen to a noticeable color, and GDK pauses for a short time * before sending exposes to windows during * gdk_window_process_updates(). The net effect is that you can see * the invalid region for each window and watch redraws as they * occur. This allows you to diagnose inefficiencies in your application. * * In essence, because the GDK rendering model prevents all flicker, * if you are redrawing the same region 400 times you may never * notice, aside from noticing a speed problem. Enabling update * debugging causes GTK to flicker slowly and noticeably, so you can * see exactly what's being redrawn when, in what order. * * The --gtk-debug=updates command line option passed to GTK+ programs * enables this debug option at application startup time. That's * usually more useful than calling gdk_window_set_debug_updates() * yourself, though you might want to use this function to enable * updates sometime after application startup time. * **/ void gdk_window_set_debug_updates (gboolean setting) { debug_updates = setting; } /** * gdk_window_constrain_size: * @geometry: a #GdkGeometry structure * @flags: a mask indicating what portions of @geometry are set * @width: desired width of window * @height: desired height of the window * @new_width: location to store resulting width * @new_height: location to store resulting height * * Constrains a desired width and height according to a * set of geometry hints (such as minimum and maximum size). */ void gdk_window_constrain_size (GdkGeometry *geometry, guint flags, gint width, gint height, gint *new_width, gint *new_height) { /* This routine is partially borrowed from fvwm. * * Copyright 1993, Robert Nation * You may use this code for any purpose, as long as the original * copyright remains in the source code and all documentation * * which in turn borrows parts of the algorithm from uwm */ gint min_width = 0; gint min_height = 0; gint base_width = 0; gint base_height = 0; gint xinc = 1; gint yinc = 1; gint max_width = G_MAXINT; gint max_height = G_MAXINT; #define FLOOR(value, base) ( ((gint) ((value) / (base))) * (base) ) if ((flags & GDK_HINT_BASE_SIZE) && (flags & GDK_HINT_MIN_SIZE)) { base_width = geometry->base_width; base_height = geometry->base_height; min_width = geometry->min_width; min_height = geometry->min_height; } else if (flags & GDK_HINT_BASE_SIZE) { base_width = geometry->base_width; base_height = geometry->base_height; min_width = geometry->base_width; min_height = geometry->base_height; } else if (flags & GDK_HINT_MIN_SIZE) { base_width = geometry->min_width; base_height = geometry->min_height; min_width = geometry->min_width; min_height = geometry->min_height; } if (flags & GDK_HINT_MAX_SIZE) { max_width = geometry->max_width ; max_height = geometry->max_height; } if (flags & GDK_HINT_RESIZE_INC) { xinc = MAX (xinc, geometry->width_inc); yinc = MAX (yinc, geometry->height_inc); } /* clamp width and height to min and max values */ width = CLAMP (width, min_width, max_width); height = CLAMP (height, min_height, max_height); /* shrink to base + N * inc */ width = base_width + FLOOR (width - base_width, xinc); height = base_height + FLOOR (height - base_height, yinc); /* constrain aspect ratio, according to: * * width * min_aspect <= -------- <= max_aspect * height */ if (flags & GDK_HINT_ASPECT && geometry->min_aspect > 0 && geometry->max_aspect > 0) { gint delta; if (geometry->min_aspect * height > width) { delta = FLOOR (height - width / geometry->min_aspect, yinc); if (height - delta >= min_height) height -= delta; else { delta = FLOOR (height * geometry->min_aspect - width, xinc); if (width + delta <= max_width) width += delta; } } if (geometry->max_aspect * height < width) { delta = FLOOR (width - height * geometry->max_aspect, xinc); if (width - delta >= min_width) width -= delta; else { delta = FLOOR (width / geometry->max_aspect - height, yinc); if (height + delta <= max_height) height += delta; } } } #undef FLOOR *new_width = width; *new_height = height; } /** * gdk_window_get_pointer: * @window: a #GdkWindow * @x: return location for X coordinate of pointer * @y: return location for Y coordinate of pointer * @mask: return location for modifier mask * * Obtains the current pointer position and modifier state. * The position is given in coordinates relative to the upper left * corner of @window. * * Return value: the window containing the pointer (as with * gdk_window_at_pointer()), or %NULL if the window containing the * pointer isn't known to GDK **/ GdkWindow* gdk_window_get_pointer (GdkWindow *window, gint *x, gint *y, GdkModifierType *mask) { GdkDisplay *display; gint tmp_x, tmp_y; GdkModifierType tmp_mask; GdkWindow *child; g_return_val_if_fail (window == NULL || GDK_IS_WINDOW (window), NULL); if (window) { display = gdk_drawable_get_display (window); } else { GdkScreen *screen = gdk_screen_get_default (); display = gdk_screen_get_display (screen); window = gdk_screen_get_root_window (screen); GDK_NOTE (MULTIHEAD, g_message ("Passing NULL for window to gdk_window_get_pointer()\n" "is not multihead safe")); } child = display->pointer_hooks->window_get_pointer (display, window, &tmp_x, &tmp_y, &tmp_mask); if (x) *x = tmp_x; if (y) *y = tmp_y; if (mask) *mask = tmp_mask; return child; } /** * gdk_window_at_pointer: * @win_x: return location for origin of the window under the pointer * @win_y: return location for origin of the window under the pointer * * Obtains the window underneath the mouse pointer, returning the * location of that window in @win_x, @win_y. Returns %NULL if the * window under the mouse pointer is not known to GDK (if the window * belongs to another application and a #GdkWindow hasn't been created * for it with gdk_window_foreign_new()) * * NOTE: For multihead-aware widgets or applications use * gdk_display_get_window_at_pointer() instead. * * Return value: window under the mouse pointer **/ GdkWindow* gdk_window_at_pointer (gint *win_x, gint *win_y) { return gdk_display_get_window_at_pointer (gdk_display_get_default (), win_x, win_y); } /** * gdk_get_default_root_window: * * Obtains the root window (parent all other windows are inside) * for the default display and screen. * * Return value: the default root window **/ GdkWindow * gdk_get_default_root_window (void) { return gdk_screen_get_root_window (gdk_screen_get_default ()); } /** * gdk_window_foreign_new: * @anid: a native window handle. * * Wraps a native window for the default display in a #GdkWindow. * This may fail if the window has been destroyed. * * For example in the X backend, a native window handle is an Xlib * XID. * * Return value: the newly-created #GdkWindow wrapper for the * native window or %NULL if the window has been destroyed. **/ GdkWindow * gdk_window_foreign_new (GdkNativeWindow anid) { return gdk_window_foreign_new_for_display (gdk_display_get_default (), anid); } /** * gdk_window_set_composited: * @window: a #GdkWindow * * Sets a #GdkWindow as composited. Composited windows do * not automatically have their contents drawn to the screen. * Drawing is redirected to an offscreen buffer and an expose * event is emitted on the parent of the composited window. * It is the responsibility of the parent's expose handler to * manually merge the off-screen content onto the screen in * whatever way it sees fit. See * for an example. * * It only makes sense for child windows to be composited; see * gdk_window_set_opacity() if you need translucent toplevel * windows. * * An additional effect of this call is that the area of this * window is no longer clipped from regions marked for * invalidation on its parent. Draws done on the parent * window are also no longer clipped by the child. * * This call is only supported on some systems (currently, * only X11 with new enough Xcomposite and Xdamage extensions). * You must call gdk_display_supports_composite() to check if * setting a window as composited is supported before * attempting to do so. * * Since: 2.12 */ void gdk_window_set_composited (GdkWindow *window, gboolean composited) { GdkWindowObject *private = (GdkWindowObject *)window; GdkDisplay *display; g_return_if_fail (window != NULL); g_return_if_fail (GDK_IS_WINDOW (window)); composited = composited != FALSE; if (private->composited == composited) return; display = gdk_drawable_get_display (GDK_DRAWABLE (window)); if (!gdk_display_supports_composite (display) && composited) { g_warning ("gdk_window_set_composited called but " "compositing is not supported"); return; } _gdk_windowing_window_set_composited (window, composited); private->composited = composited; } #define __GDK_WINDOW_C__ #include "gdkaliasdef.c"