[gimp] libgimpcolor: add gimp_pixbuf_get_icc_profile()

[Michael Natterer <mitch src gnome org>]

commit 4422128ecc427211e57217d67e6d2eadad8b490b
Author: Michael Natterer <mitch gimp org>
Date:   Tue Jun 16 23:43:40 2015 +0200

    libgimpcolor: add gimp_pixbuf_get_icc_profile()
    
    which decodes and returns the pixbuf's base64-encoded "icc-profile"
    property.

 libgimpcolor/gimpcolor.def |    1 +
 libgimpcolor/gimppixbuf.c  |   37 +++++++++++++++++++++++++++++++++++++
 libgimpcolor/gimppixbuf.h  |    7 +++++--
 3 files changed, 43 insertions(+), 2 deletions(-)
---
diff --git a/libgimpcolor/gimpcolor.def b/libgimpcolor/gimpcolor.def
index 6220587..79e64dd 100644
--- a/libgimpcolor/gimpcolor.def
+++ b/libgimpcolor/gimpcolor.def
@@ -59,6 +59,7 @@ EXPORTS
        gimp_param_spec_rgb_has_alpha
        gimp_pixbuf_create_buffer
        gimp_pixbuf_get_format
+       gimp_pixbuf_get_icc_profile
        gimp_rgb_add
        gimp_rgb_clamp
        gimp_rgb_composite
diff --git a/libgimpcolor/gimppixbuf.c b/libgimpcolor/gimppixbuf.c
index bb44382..ac1f9ac 100644
--- a/libgimpcolor/gimppixbuf.c
+++ b/libgimpcolor/gimppixbuf.c
@@ -114,3 +114,40 @@ gimp_pixbuf_create_buffer (GdkPixbuf *pixbuf)
       return buffer;
     }
 }
+
+/**
+ * gimp_pixbuf_get_icc_profile:
+ * @pixbuf: a #GdkPixbuf
+ * @length: return location for the ICC profile's length
+ *
+ * Returns the ICC profile attached to the @pixbuf, or %NULL if there
+ * is none.
+ *
+ * Return value: The ICC profile data, or %NULL. The value should be freed
+ *               with g_free().
+ *
+ * Since: 2.10
+ **/
+guint8 *
+gimp_pixbuf_get_icc_profile (GdkPixbuf *pixbuf,
+                             gsize     *length)
+{
+  gchar *icc_base64 = NULL;
+
+  g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
+  g_return_val_if_fail (length != NULL, NULL);
+
+  g_object_get (pixbuf, "icc-profile", icc_base64, NULL);
+
+  if (icc_base64)
+    {
+      guint8 *icc_data;
+
+      icc_data = g_base64_decode (icc_base64, length);
+      g_free (icc_base64);
+
+      return icc_data;
+    }
+
+  return NULL;
+}
diff --git a/libgimpcolor/gimppixbuf.h b/libgimpcolor/gimppixbuf.h
index bad438e..58597e0 100644
--- a/libgimpcolor/gimppixbuf.h
+++ b/libgimpcolor/gimppixbuf.h
@@ -31,8 +31,11 @@ G_BEGIN_DECLS
 /* For information look into the C source or the html documentation */
 
 
-const Babl * gimp_pixbuf_get_format    (GdkPixbuf *pixbuf);
-GeglBuffer * gimp_pixbuf_create_buffer (GdkPixbuf *pixbuf);
+const Babl * gimp_pixbuf_get_format      (GdkPixbuf *pixbuf);
+GeglBuffer * gimp_pixbuf_create_buffer   (GdkPixbuf *pixbuf);
+
+guint8     * gimp_pixbuf_get_icc_profile (GdkPixbuf *pixbuf,
+                                          gsize     *length);
 
 
 G_END_DECLS