1 files changed, 73 insertions, 0 deletions
diff --git a/libgimpbase/gimpchecks.c b/libgimpbase/gimpchecks.c
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
+ *
+ * gimpchecks.c
+ * Copyright (C) 2004  Sven Neumann <sven@gimp.org>
+ *
+ * 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 3 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, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <glib-object.h>
+
+#include "gimpbasetypes.h"
+
+#include "gimpchecks.h"
+
+
+/**
+ * SECTION: gimpchecks
+ * @title: gimpchecks
+ * @short_description: Constants and functions related to rendering
+ *                     checkerboards.
+ *
+ * Constants and functions related to rendering checkerboards.
+ **/
+
+
+/**
+ * gimp_checks_get_shades:
+ * @type:  the checkerboard type
+ * @light: return location for the light shade
+ * @dark:  return location for the dark shade
+ *
+ * Retrieves the actual shades of gray to use when drawing a
+ * checkerboard for a certain #GimpCheckType.
+ *
+ * Since: 2.2
+ **/
+void
+gimp_checks_get_shades (GimpCheckType  type,
+                        guchar        *light,
+                        guchar        *dark)
+{
+  const guchar shades[6][2] =
+    {
+      { 204, 255 },  /*  LIGHT_CHECKS  */
+      { 102, 153 },  /*  GRAY_CHECKS   */
+      {   0,  51 },  /*  DARK_CHECKS   */
+      { 255, 255 },  /*  WHITE_ONLY    */
+      { 127, 127 },  /*  GRAY_ONLY     */
+      {   0,   0 }   /*  BLACK_ONLY    */
+    };
+
+  type = MIN (type, 5);
+
+  if (light)
+    *light = shades[type][1];
+  if (dark)
+    *dark  = shades[type][0];
+}