app, libgimp, pdb: have GimpTrcType into public libgimp.

It is being used as filter arguments in 2 GIMP filters (curves and
levels) so we want to be able to send this enum type through the wire.

app/core/core-enums.h

@@ -480,7 +480,7 @@ typedef enum  /*< pdb-skip >*/
 
 GType gimp_trc_type_get_type (void) G_GNUC_CONST;
 
-typedef enum  /*< pdb-skip >*/
+typedef enum
 {
   GIMP_TRC_LINEAR,     /*< desc="Linear"     >*/
   GIMP_TRC_NON_LINEAR, /*< desc="Non-Linear" >*/

libgimp/gimp.def

@@ -1056,6 +1056,7 @@ EXPORTS
 	gimp_thumbnail_procedure_new
 	gimp_tile_height
 	gimp_tile_width
+	gimp_trc_type_get_type
 	gimp_unit_new
 	gimp_user_time
 	gimp_vector_load_procedure_extract_dimensions

libgimp/gimpenums.c.tail

@@ -64,7 +64,8 @@ static const GimpGetTypeFunc get_type_funcs[] =
   gimp_text_justification_get_type,
   gimp_transfer_mode_get_type,
   gimp_transform_direction_get_type,
-  gimp_transform_resize_get_type
+  gimp_transform_resize_get_type,
+  gimp_trc_type_get_type
 };
 
 static const gchar * const type_names[] =
@@ -130,7 +131,8 @@ static const gchar * const type_names[] =
   "GimpTextJustification",
   "GimpTransferMode",
   "GimpTransformDirection",
-  "GimpTransformResize"
+  "GimpTransformResize",
+  "GimpTRCType"
 };
 
 static gboolean enums_initialized = FALSE;

libgimp/gimpenums.h

@@ -278,6 +278,26 @@ typedef enum
 } GimpLayerMode;
 
 
+#define GIMP_TYPE_TRC_TYPE (gimp_trc_type_get_type ())
+
+GType gimp_trc_type_get_type (void) G_GNUC_CONST;
+
+/**
+ * GimpTRCType:
+ * @GIMP_TRC_LINEAR: GIMP_TRC_LINEAR
+ * @GIMP_TRC_NON_LINEAR: GIMP_TRC_NON_LINEAR
+ * @GIMP_TRC_PERCEPTUAL: GIMP_TRC_PERCEPTUAL
+ *
+ * Extracted from app/core/core-enums.h
+ **/
+typedef enum
+{
+  GIMP_TRC_LINEAR,
+  GIMP_TRC_NON_LINEAR,
+  GIMP_TRC_PERCEPTUAL
+} GimpTRCType;
+
+
 void           gimp_enums_init           (void);
 
 const gchar ** gimp_enums_get_type_names (gint *n_type_names);

pdb/enums.pl

@@ -862,6 +862,15 @@ package Gimp::CodeGen::enums;
 		       GIMP_HISTOGRAM_ALPHA => '4',
 		       GIMP_HISTOGRAM_LUMINANCE => '5' }
 	},
+    GimpTRCType =>
+	{ contig => 1,
+	  header => 'core/core-enums.h',
+	  symbols => [ qw(GIMP_TRC_LINEAR GIMP_TRC_NON_LINEAR
+			  GIMP_TRC_PERCEPTUAL) ],
+	  mapping => { GIMP_TRC_LINEAR => '0',
+		       GIMP_TRC_NON_LINEAR => '1',
+		       GIMP_TRC_PERCEPTUAL => '2' }
+	},
     GimpBrushApplicationMode =>
 	{ contig => 1,
 	  header => 'paint/paint-enums.h',