1 files changed, 93 insertions, 0 deletions
diff --git a/app/gegl/gimp-babl-compat.c b/app/gegl/gimp-babl-compat.c
new file mode 100644
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--- /dev/null
+++ b/app/gegl/gimp-babl-compat.c
@@ -0,0 +1,93 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimp-babl-compat.h
+ * Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 "gimp-gegl-types.h"
+
+#include "gimp-babl.h"
+#include "gimp-babl-compat.h"
+
+
+GimpImageType
+gimp_babl_format_get_image_type (const Babl *format)
+{
+  const Babl *model;
+
+  g_return_val_if_fail (format != NULL, -1);
+
+  model = babl_format_get_model (format);
+
+  if (model == babl_model ("Y") ||
+      model == babl_model ("Y'"))
+    {
+      return GIMP_GRAY_IMAGE;
+    }
+  else if (model == babl_model ("YA") ||
+           model == babl_model ("Y'A"))
+    {
+      return GIMP_GRAYA_IMAGE;
+    }
+  else if (model == babl_model ("RGB") ||
+           model == babl_model ("R'G'B'"))
+    {
+      return GIMP_RGB_IMAGE;
+    }
+  else if (model == babl_model ("RGBA") ||
+           model == babl_model ("R'G'B'A"))
+    {
+      return GIMP_RGBA_IMAGE;
+    }
+  else if (babl_format_is_palette (format))
+    {
+      if (babl_format_has_alpha (format))
+        return GIMP_INDEXEDA_IMAGE;
+      else
+        return GIMP_INDEXED_IMAGE;
+    }
+
+  g_return_val_if_reached (-1);
+}
+
+const Babl *
+gimp_babl_compat_u8_format (const Babl *format)
+{
+  g_return_val_if_fail (format != NULL, NULL);
+
+  /*  indexed images only exist in u8, return the same format  */
+  if (babl_format_is_palette (format))
+    return format;
+
+  return gimp_babl_format (gimp_babl_format_get_base_type (format),
+                           GIMP_PRECISION_U8_GAMMA,
+                           babl_format_has_alpha (format));
+}
+
+const Babl *
+gimp_babl_compat_u8_mask_format (const Babl *format)
+{
+  g_return_val_if_fail (format != NULL, NULL);
+
+  return gimp_babl_format (gimp_babl_format_get_base_type (format),
+                           GIMP_PRECISION_U8_LINEAR,
+                           FALSE);
+}