forked from AuroraMiddleware/gtk
added GdkRectangle *clip_rect to gtk_widget_get_snapshot().
2008-05-21 21:10:15 Tim Janik <timj@imendio.com> * gtk/gtkwidget.h: added GdkRectangle *clip_rect to gtk_widget_get_snapshot(). * gtk/gtkwidget.c: clip the returned snapshot pixmap to clip_rect. return snapshot pixmap coordinates widget relative in *clip_rect. * tests/testgtk.c: fixed bogus NULL pointer unref. svn path=/trunk/; revision=20124
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@ -1,3 +1,12 @@
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2008-05-21 21:10:15 Tim Janik <timj@imendio.com>
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* gtk/gtkwidget.h: added GdkRectangle *clip_rect to gtk_widget_get_snapshot().
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* gtk/gtkwidget.c: clip the returned snapshot pixmap to clip_rect.
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return snapshot pixmap coordinates widget relative in *clip_rect.
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* tests/testgtk.c: fixed bogus NULL pointer unref.
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2008-05-21 21:04:28 Tim Janik <timj@imendio.com>
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* gtk/gtkwidget.c gtk_widget_get_snapshot(): grow snapshot area from
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@ -8313,31 +8313,50 @@ gtk_widget_unref (GtkWidget *widget)
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/**
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* gtk_widget_get_snapshot:
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* @widget: a #GtkWidget
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* @widget: a #GtkWidget
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* @clip_rect: a #GdkRectangle or %NULL
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*
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* Creates a #GdkPixmap of the contents of the widget and its
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* children. Works even if the widget is obscured.
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* Note that the depth and visual of the resulting pixmap is dependent
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* on the widget being snapshot and likely differs from those of a target
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* widget displaying the pixmap. Use gdk_pixbuf_get_from_drawable()
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* to convert the pixmap to a visual independant representation.
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* Create a #GdkPixmap of the contents of the widget and its children.
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* Works even if the widget is obscured. The depth and visual of the
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* resulting pixmap is dependent on the widget being snapshot and likely
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* differs from those of a target widget displaying the pixmap.
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* The function gdk_pixbuf_get_from_drawable() can be used to convert
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* the pixmap to a visual independant representation.
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* The snapshot area used by this function is the @widget's allocation plus
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* any extra space occupied by additional windows belonging to this widget
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* (such as the arrows of a spin button).
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* Thus, the resulting snapshot pixmap is possibly larger than the allocation.
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* If @clip_rect is non NULL, the resulting pixmap is shrunken to
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* match the specified clip_rect. The (x,y) coordinates of @clip_rect are
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* interpreted widget relative. If width or height of @clip_rect are 0 or
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* negative, the width or height of the resulting pixmap will be shrunken
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* by the respective amount.
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* For instance a @clip_rect <literal>{ +5, +5, -10, -10 }</literal> will
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* chop off 5 pixel at each side of the snapshot pixmap.
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* If non-%NULL, clip_rect will contain the exact widget relative snapshot
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* coordinates upon return. A @clip_rect of <literal>{ -1, -1, 0, 0 }</literal>
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* can be used to preserve the auto-grown snapshot area and use @clip_rect
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* as a pure output parameter.
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* The returned pixmap can be %NULL, if the resulting clip_area was empty.
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*
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* Return value: #GdkPixmap of the widget
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* Return value: #GdkPixmap snapshot of the widget
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* Since: 2.16
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**/
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GdkPixmap*
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gtk_widget_get_snapshot (GtkWidget *widget)
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gtk_widget_get_snapshot (GtkWidget *widget,
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GdkRectangle *clip_rect)
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{
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int x, y, width, height;
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GdkWindow *parent_window = NULL;
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GdkPixmap *pixmap;
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/* the widget (and parent_window) must be realized to be drawable */
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if (widget->parent && !GTK_WIDGET_REALIZED (widget->parent))
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gtk_widget_realize (widget->parent);
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if (!GTK_WIDGET_REALIZED (widget))
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gtk_widget_realize (widget);
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/* figure snapshot rectangle */
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/* determine snapshot rectangle */
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x = widget->allocation.x;
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y = widget->allocation.y;
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width = widget->allocation.width;
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@ -8345,6 +8364,7 @@ gtk_widget_get_snapshot (GtkWidget *widget)
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GList *windows = NULL, *list;
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if (widget->parent && !GTK_WIDGET_NO_WINDOW (widget))
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{
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/* grow snapshot rectangle to cover all widget windows */
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parent_window = gtk_widget_get_parent_window (widget);
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for (list = gdk_window_peek_children (parent_window); list; list = list->next)
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{
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@ -8377,18 +8397,50 @@ gtk_widget_get_snapshot (GtkWidget *widget)
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else if (!widget->parent)
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x = y = 0; /* toplevel */
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/* at this point, (x,y,width,height) is the parent_window relative
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* snapshot area covering all of widget's windows.
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*/
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/* shrink snapshot size by clip_rectangle */
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if (clip_rect)
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{
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GdkRectangle snap = { x, y, width, height }, clip = *clip_rect;
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clip.x = clip.x < 0 ? x : clip.x;
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clip.y = clip.y < 0 ? y : clip.y;
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clip.width = clip.width <= 0 ? MAX (0, width + clip.width) : clip.width;
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clip.height = clip.height <= 0 ? MAX (0, height + clip.height) : clip.height;
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if (widget->parent)
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{
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/* offset clip_rect, so it's parent_window relative */
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if (clip_rect->x >= 0)
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clip.x += widget->allocation.x;
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if (clip_rect->y >= 0)
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clip.y += widget->allocation.y;
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}
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if (!gdk_rectangle_intersect (&snap, &clip, &snap))
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{
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g_list_free (windows);
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clip_rect->width = clip_rect->height = 0;
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return NULL; /* empty snapshot area */
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}
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x = snap.x;
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y = snap.y;
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width = snap.width;
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height = snap.height;
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}
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/* render snapshot */
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pixmap = gdk_pixmap_new (widget->window, width, height, gdk_drawable_get_depth (widget->window));
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for (list = windows; list; list = list->next)
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for (list = windows; list; list = list->next) /* !NO_WINDOW widgets */
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{
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GdkWindow *subwin = list->data;
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int wx, wy;
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gdk_window_get_position (subwin, &wx, &wy);
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gdk_window_redirect_to_drawable (subwin, pixmap, MAX (0, x - wx), MAX (0, y - wy),
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wx - x, wy - y, width, height);
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MAX (0, wx - x), MAX (0, wy - y), width, height);
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gdk_window_invalidate_rect (subwin, NULL, TRUE);
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}
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if (!windows) /* NO_WINDOW || toplevel */
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if (!windows) /* NO_WINDOW || toplevel => parent_window == NULL || parent_window == widget->window */
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{
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gdk_window_redirect_to_drawable (widget->window, pixmap, x, y, 0, 0, width, height);
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gdk_window_invalidate_rect (widget->window, NULL, TRUE);
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@ -8404,6 +8456,25 @@ gtk_widget_get_snapshot (GtkWidget *widget)
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if (!windows) /* NO_WINDOW || toplevel */
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gdk_window_remove_redirection (widget->window);
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g_list_free (windows);
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/* return pixmap and snapshot rectangle coordinates */
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if (clip_rect)
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{
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clip_rect->x = x;
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clip_rect->y = y;
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clip_rect->width = width;
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clip_rect->height = height;
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if (widget->parent)
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{
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/* offset clip_rect from parent_window so it's widget relative */
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clip_rect->x -= widget->allocation.x;
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clip_rect->y -= widget->allocation.y;
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}
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if (0)
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g_printerr ("gtk_widget_get_snapshot: %s (%d,%d, %dx%d)\n",
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G_OBJECT_TYPE_NAME (widget),
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clip_rect->x, clip_rect->y, clip_rect->width, clip_rect->height);
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}
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return pixmap;
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}
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@ -614,7 +614,8 @@ GdkWindow * gtk_widget_get_root_window (GtkWidget *widget);
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GtkSettings* gtk_widget_get_settings (GtkWidget *widget);
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GtkClipboard *gtk_widget_get_clipboard (GtkWidget *widget,
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GdkAtom selection);
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GdkPixmap * gtk_widget_get_snapshot (GtkWidget *widget);
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GdkPixmap * gtk_widget_get_snapshot (GtkWidget *widget,
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GdkRectangle *clip_rect);
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#ifndef GTK_DISABLE_DEPRECATED
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#define gtk_widget_set_visual(widget,visual) ((void) 0)
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@ -12259,16 +12259,16 @@ snapshot_widget_event (GtkWidget *widget,
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if (res_widget)
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{
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GdkPixmap *pixmap;
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GdkPixbuf *pixbuf = NULL;
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GtkWidget *window, *image;
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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pixmap = gtk_widget_get_snapshot (res_widget);
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pixmap = gtk_widget_get_snapshot (res_widget, NULL);
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gtk_widget_realize (window);
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if (gdk_drawable_get_depth (window->window) != gdk_drawable_get_depth (pixmap))
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{
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/* this branch is needed to convert ARGB -> RGB */
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int width, height;
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GdkPixbuf *pixbuf;
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gdk_drawable_get_size (pixmap, &width, &height);
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pixbuf = gdk_pixbuf_get_from_drawable (NULL, pixmap,
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gtk_widget_get_colormap (res_widget),
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@ -12276,10 +12276,10 @@ snapshot_widget_event (GtkWidget *widget,
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0, 0,
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width, height);
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image = gtk_image_new_from_pixbuf (pixbuf);
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g_object_unref (pixbuf);
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}
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else
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image = gtk_image_new_from_pixmap (pixmap, NULL);
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g_object_unref (pixbuf);
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gtk_container_add (GTK_CONTAINER (window), image);
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g_object_unref (pixmap);
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gtk_widget_show_all (window);
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