1 files changed, 76 insertions, 0 deletions
diff --git a/app/display/gimpdisplayshell-expose.c b/app/display/gimpdisplayshell-expose.c
new file mode 100644
index 0000000..2320a90
--- /dev/null
+++ b/app/display/gimpdisplayshell-expose.c
@@ -0,0 +1,76 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "display-types.h"
+
+#include "gimpdisplayshell.h"
+#include "gimpdisplayshell-expose.h"
+
+
+void
+gimp_display_shell_expose_area (GimpDisplayShell *shell,
+                                gint              x,
+                                gint              y,
+                                gint              w,
+                                gint              h)
+{
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+  gtk_widget_queue_draw_area (shell->canvas, x, y, w, h);
+}
+
+void
+gimp_display_shell_expose_region (GimpDisplayShell *shell,
+                                  cairo_region_t   *region)
+{
+  GdkWindow *window;
+  gint       n_rectangles;
+  gint       i;
+
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+  g_return_if_fail (region != NULL);
+
+  if (! gtk_widget_get_realized (shell->canvas))
+    return;
+
+  window = gtk_widget_get_window (shell->canvas);
+  n_rectangles = cairo_region_num_rectangles (region);
+
+  for (i = 0; i < n_rectangles; i++)
+    {
+      cairo_rectangle_int_t rectangle;
+
+      cairo_region_get_rectangle (region, i, &rectangle);
+
+      gdk_window_invalidate_rect (window,
+                                  (GdkRectangle *) &rectangle,
+                                  TRUE);
+    }
+}
+
+void
+gimp_display_shell_expose_full (GimpDisplayShell *shell)
+{
+  g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
+
+  gtk_widget_queue_draw (shell->canvas);
+}