[gimp/gimp-2-10] libgimp: forgot to deprecate gimp_gamma()

[Michael Natterer <mitch src gnome org>]

commit 1663e6371755fdb28c83f62467e9dd2a93c051e0
Author: Michael Natterer <mitch gimp org>
Date:   Mon Jun 18 02:59:24 2018 +0200

    libgimp: forgot to deprecate gimp_gamma()

 libgimp/gimp.c             | 13 ++++++++-----
 libgimp/gimp.h             |  3 ++-
 plug-ins/common/file-mng.c |  2 +-
 3 files changed, 11 insertions(+), 7 deletions(-)
---
diff --git a/libgimp/gimp.c b/libgimp/gimp.c
index 1f8d62309f..13e0b975cb 100644
--- a/libgimp/gimp.c
+++ b/libgimp/gimp.c
@@ -213,7 +213,6 @@ static gint           _tile_width        = -1;
 static gint           _tile_height       = -1;
 static gint           _shm_ID            = -1;
 static guchar        *_shm_addr          = NULL;
-static const gdouble  _gamma_val         = 2.2;
 static gboolean       _show_tool_tips    = TRUE;
 static gboolean       _show_help_button  = TRUE;
 static gboolean       _export_profile    = FALSE;
@@ -1364,18 +1363,22 @@ gimp_shm_addr (void)
  * Returns the global gamma value GIMP and all its plug-ins should
  * use.
  *
- * This is a constant value given at plug-in configuration time.
+ * This is a constant value.
  *
  * NOTE: This function will always return 2.2, the gamma value for
- * sRGB. There's currently no way to change this and all operations
- * should assume that pixel data is in the sRGB colorspace.
+ * sRGB. If you need the actual gamma value of a drawable, look at its
+ * format.
+ *
+ * See also: gimp_drawable_get_format().
+ *
+ * @Deprecated: 2.8.4
  *
  * Return value: the gamma value
  **/
 gdouble
 gimp_gamma (void)
 {
-  return _gamma_val;
+  return 2.2;
 }
 
 /**
diff --git a/libgimp/gimp.h b/libgimp/gimp.h
index 3b73ac474d..19e0f12232 100644
--- a/libgimp/gimp.h
+++ b/libgimp/gimp.h
@@ -327,7 +327,6 @@ guint          gimp_tile_width           (void) G_GNUC_CONST;
 guint          gimp_tile_height          (void) G_GNUC_CONST;
 gint           gimp_shm_ID               (void) G_GNUC_CONST;
 guchar       * gimp_shm_addr             (void) G_GNUC_CONST;
-gdouble        gimp_gamma                (void) G_GNUC_CONST;
 gboolean       gimp_show_tool_tips       (void) G_GNUC_CONST;
 gboolean       gimp_show_help_button     (void) G_GNUC_CONST;
 gboolean       gimp_export_color_profile (void) G_GNUC_CONST;
@@ -345,6 +344,8 @@ const gchar  * gimp_icon_theme_dir       (void) G_GNUC_CONST;
 
 const gchar  * gimp_get_progname         (void) G_GNUC_CONST;
 
+GIMP_DEPRECATED
+gdouble        gimp_gamma                (void) G_GNUC_CONST;
 GIMP_DEPRECATED
 gboolean       gimp_install_cmap         (void) G_GNUC_CONST;
 GIMP_DEPRECATED
diff --git a/plug-ins/common/file-mng.c b/plug-ins/common/file-mng.c
index 6d4f8b9e10..7b1a753df6 100644
--- a/plug-ins/common/file-mng.c
+++ b/plug-ins/common/file-mng.c
@@ -750,7 +750,7 @@ mng_save_image (const gchar  *filename,
   if (mng_data.gama)
     {
       if (mng_putchunk_gama (handle, MNG_FALSE,
-                             (1.0 / (gimp_gamma ()) * 100000)) != MNG_NOERROR)
+                             (1.0 / 2.2 * 100000)) != MNG_NOERROR)
         {
           g_warning ("Unable to mng_putchunk_gama() in mng_save_image()");
           goto err3;