[gimp] plug-ins: add support for half-floating point ICC profile conversions to lcms

[Michael Natterer <mitch src gnome org>]

commit fd5a017633247243ba746ef3f4e56e7c3e48808e
Author: Elle Stone <l elle stone gmail com>
Date:   Mon Feb 25 09:55:30 2013 -0500

    plug-ins: add support for half-floating point ICC profile conversions to lcms

 plug-ins/common/lcms.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/plug-ins/common/lcms.c b/plug-ins/common/lcms.c
index ae689d5..d0f8d22 100644
--- a/plug-ins/common/lcms.c
+++ b/plug-ins/common/lcms.c
@@ -1019,6 +1019,19 @@ lcms_image_transform_rgb (gint32                    image,
               iter_format = babl_format ("R'G'B' u16");
             }
         }
+      else if (type == babl_type ("half")) /* 16-bit floating point (half) */
+        {
+          if (has_alpha)
+            {
+              lcms_format = TYPE_RGBA_HALF_FLT;
+              iter_format = babl_format ("R'G'B'A half");
+            }
+          else
+            {
+              lcms_format = TYPE_RGB_HALF_FLT;
+              iter_format = babl_format ("R'G'B' half");
+            }
+        }
       else if (type == babl_type ("float"))
         {
           if (has_alpha)