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#include <gtk/gtk.h>
#include "widgets.h"
typedef enum {
SNAPSHOT_WINDOW,
SNAPSHOT_DRAW
} SnapshotMode;
static gboolean
quit_when_idle (gpointer loop)
{
g_main_loop_quit (loop);
return G_SOURCE_REMOVE;
}
static void
check_for_draw (GdkEvent *event, gpointer loop)
{
if (event->type == GDK_EXPOSE)
{
g_idle_add (quit_when_idle, loop);
gdk_event_handler_set ((GdkEventFunc) gtk_main_do_event, NULL, NULL);
}
gtk_main_do_event (event);
}
static cairo_surface_t *
snapshot_widget (GtkWidget *widget, SnapshotMode mode)
{
cairo_surface_t *surface;
cairo_pattern_t *bg;
GMainLoop *loop;
cairo_t *cr;
g_assert (gtk_widget_get_realized (widget));
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));
loop = g_main_loop_new (NULL, FALSE);
/* We wait until the widget is drawn for the first time.
* We can not wait for a GtkWidget::draw event, because that might not
* happen if the window is fully obscured by windowed child widgets.
* Alternatively, we could wait for an expose event on widget's window.
* Both of these are rather hairy, not sure what's best. */
gdk_event_handler_set (check_for_draw, loop, NULL);
g_main_loop_run (loop);
cr = cairo_create (surface);
switch (mode)
{
case SNAPSHOT_WINDOW:
{
GdkWindow *window = gtk_widget_get_window (widget);
if (gdk_window_get_window_type (window) == GDK_WINDOW_TOPLEVEL ||
gdk_window_get_window_type (window) == GDK_WINDOW_FOREIGN)
{
/* give the WM/server some time to sync. They need it.
* Also, do use popups instead of toplevls in your tests
* whenever you can. */
gdk_display_sync (gdk_window_get_display (window));
g_timeout_add (500, quit_when_idle, loop);
g_main_loop_run (loop);
}
gdk_cairo_set_source_window (cr, window, 0, 0);
cairo_paint (cr);
}
break;
case SNAPSHOT_DRAW:
bg = gdk_window_get_background_pattern (gtk_widget_get_window (widget));
if (bg)
{
cairo_set_source (cr, bg);
cairo_paint (cr);
}
gtk_widget_draw (widget, cr);
break;
default:
g_assert_not_reached();
break;
}
cairo_destroy (cr);
g_main_loop_unref (loop);
gtk_widget_destroy (widget);
return surface;
}
int main (int argc, char **argv)
{
GList *toplevels;
GList *node;
/* If there's no DISPLAY, we silently error out. We don't want to break
* headless builds. */
if (! gtk_init_check (&argc, &argv))
return 0;
toplevels = get_all_widgets ();
for (node = toplevels; node; node = g_list_next (node))
{
WidgetInfo *info;
char *filename;
cairo_surface_t *surface;
info = node->data;
gtk_widget_show (info->window);
surface = snapshot_widget (info->window,
info->include_decorations ? SNAPSHOT_WINDOW : SNAPSHOT_DRAW);
filename = g_strdup_printf ("./%s.png", info->name);
g_assert (cairo_surface_write_to_png (surface, filename) == CAIRO_STATUS_SUCCESS);
g_free (filename);
}
return 0;
}
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