fe->image = NULL;
}
-static void wipe_and_destroy_cairo(frontend *fe, cairo_t *cr)
+static void wipe_and_maybe_destroy_cairo(frontend *fe, cairo_t *cr,
+ int destroy)
{
cairo_set_source_rgb(cr, fe->colours[0], fe->colours[1], fe->colours[2]);
cairo_paint(cr);
- cairo_destroy(cr);
+ if (destroy)
+ cairo_destroy(cr);
}
static void setup_backing_store(frontend *fe)
fe->image = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
fe->pw, fe->ph);
- wipe_and_destroy_cairo(fe, cairo_create(fe->image));
+ wipe_and_maybe_destroy_cairo(fe, cairo_create(fe->image), TRUE);
#ifndef USE_CAIRO_WITHOUT_PIXMAP
- wipe_and_destroy_cairo(fe, gdk_cairo_create(fe->pixmap));
+ wipe_and_maybe_destroy_cairo(fe, gdk_cairo_create(fe->pixmap), TRUE);
+#endif
+#if GTK_CHECK_VERSION(3,22,0)
+ {
+ GdkWindow *gdkwin;
+ cairo_region_t *region;
+ GdkDrawingContext *drawctx;
+ cairo_t *cr;
+
+ gdkwin = gtk_widget_get_window(fe->area);
+ region = gdk_window_get_clip_region(gdkwin);
+ drawctx = gdk_window_begin_draw_frame(gdkwin, region);
+ cr = gdk_drawing_context_get_cairo_context(drawctx);
+ wipe_and_maybe_destroy_cairo(fe, cr, FALSE);
+ gdk_window_end_draw_frame(gdkwin, drawctx);
+ cairo_region_destroy(region);
+ }
+#else
+ wipe_and_maybe_destroy_cairo(
+ fe, gdk_cairo_create(gtk_widget_get_window(fe->area)), TRUE);
#endif
- wipe_and_destroy_cairo(fe, gdk_cairo_create
- (gtk_widget_get_window(fe->area)));
}
static int backing_store_ok(frontend *fe)