[gimp] app: add GimpPickable::get_babl_format_with_alpha()

[Michael Natterer <mitch src gnome org>]

commit e9ecc40f028cf1d3ce9c855500b931f365732051
Author: Michael Natterer <mitch gimp org>
Date:   Sun Mar 18 15:37:12 2012 +0100

    app: add GimpPickable::get_babl_format_with_alpha()

 app/core/gimpdrawable.c   |   15 ++++++++-------
 app/core/gimpimagemap.c   |   25 ++++++++++++++++++-------
 app/core/gimppickable.c   |   17 ++++++++++++++++-
 app/core/gimppickable.h   |   31 +++++++++++++++++--------------
 app/core/gimpprojection.c |   19 ++++++++++---------
 5 files changed, 69 insertions(+), 38 deletions(-)
---
diff --git a/app/core/gimpdrawable.c b/app/core/gimpdrawable.c
index 92fcf3b..fd272bf 100644
--- a/app/core/gimpdrawable.c
+++ b/app/core/gimpdrawable.c
@@ -269,13 +269,14 @@ gimp_drawable_init (GimpDrawable *drawable)
 static void
 gimp_drawable_pickable_iface_init (GimpPickableInterface *iface)
 {
-  iface->get_image       = (GimpImage     * (*) (GimpPickable *pickable)) gimp_item_get_image;
-  iface->get_babl_format = (const Babl    * (*) (GimpPickable *pickable)) gimp_drawable_get_babl_format;
-  iface->get_image_type  = (GimpImageType   (*) (GimpPickable *pickable)) gimp_drawable_type;
-  iface->get_bytes       = (gint            (*) (GimpPickable *pickable)) gimp_drawable_bytes;
-  iface->get_buffer      = (GeglBuffer    * (*) (GimpPickable *pickable)) gimp_drawable_get_read_buffer;
-  iface->get_tiles       = (TileManager   * (*) (GimpPickable *pickable)) gimp_drawable_get_tiles;
-  iface->get_pixel_at    = gimp_drawable_get_pixel_at;
+  iface->get_image                  = (GimpImage     * (*) (GimpPickable *pickable)) gimp_item_get_image;
+  iface->get_babl_format            = (const Babl    * (*) (GimpPickable *pickable)) gimp_drawable_get_babl_format;
+  iface->get_babl_format_with_alpha = (const Babl    * (*) (GimpPickable *pickable)) gimp_drawable_get_babl_format_with_alpha;
+  iface->get_image_type             = (GimpImageType   (*) (GimpPickable *pickable)) gimp_drawable_type;
+  iface->get_bytes                  = (gint            (*) (GimpPickable *pickable)) gimp_drawable_bytes;
+  iface->get_buffer                 = (GeglBuffer    * (*) (GimpPickable *pickable)) gimp_drawable_get_read_buffer;
+  iface->get_tiles                  = (TileManager   * (*) (GimpPickable *pickable)) gimp_drawable_get_tiles;
+  iface->get_pixel_at               = gimp_drawable_get_pixel_at;
 }
 
 static void
diff --git a/app/core/gimpimagemap.c b/app/core/gimpimagemap.c
index ed8ad18..7463459 100644
--- a/app/core/gimpimagemap.c
+++ b/app/core/gimpimagemap.c
@@ -102,6 +102,8 @@ static void            gimp_image_map_finalize        (GObject             *obje
 
 static GimpImage     * gimp_image_map_get_image       (GimpPickable        *pickable);
 static const Babl    * gimp_image_map_get_babl_format (GimpPickable        *pickable);
+static const Babl    * gimp_image_map_get_babl_format_with_alpha
+                                                      (GimpPickable        *pickable);
 static GimpImageType   gimp_image_map_get_image_type  (GimpPickable        *pickable);
 static gint            gimp_image_map_get_bytes       (GimpPickable        *pickable);
 static GeglBuffer    * gimp_image_map_get_buffer      (GimpPickable        *pickable);
@@ -154,13 +156,14 @@ gimp_image_map_class_init (GimpImageMapClass *klass)
 static void
 gimp_image_map_pickable_iface_init (GimpPickableInterface *iface)
 {
-  iface->get_image       = gimp_image_map_get_image;
-  iface->get_babl_format = gimp_image_map_get_babl_format;
-  iface->get_image_type  = gimp_image_map_get_image_type;
-  iface->get_bytes       = gimp_image_map_get_bytes;
-  iface->get_buffer      = gimp_image_map_get_buffer;
-  iface->get_tiles       = gimp_image_map_get_tiles;
-  iface->get_pixel_at    = gimp_image_map_get_pixel_at;
+  iface->get_image                  = gimp_image_map_get_image;
+  iface->get_babl_format            = gimp_image_map_get_babl_format;
+  iface->get_babl_format_with_alpha = gimp_image_map_get_babl_format_with_alpha;
+  iface->get_image_type             = gimp_image_map_get_image_type;
+  iface->get_bytes                  = gimp_image_map_get_bytes;
+  iface->get_buffer                 = gimp_image_map_get_buffer;
+  iface->get_tiles                  = gimp_image_map_get_tiles;
+  iface->get_pixel_at               = gimp_image_map_get_pixel_at;
 }
 
 static void
@@ -272,6 +275,14 @@ gimp_image_map_get_babl_format (GimpPickable *pickable)
   return gimp_pickable_get_babl_format (GIMP_PICKABLE (image_map->drawable));
 }
 
+static const Babl *
+gimp_image_map_get_babl_format_with_alpha (GimpPickable *pickable)
+{
+  GimpImageMap *image_map = GIMP_IMAGE_MAP (pickable);
+
+  return gimp_pickable_get_babl_format_with_alpha (GIMP_PICKABLE (image_map->drawable));
+}
+
 static GimpImageType
 gimp_image_map_get_image_type (GimpPickable *pickable)
 {
diff --git a/app/core/gimppickable.c b/app/core/gimppickable.c
index 7f2d051..a43b0b3 100644
--- a/app/core/gimppickable.c
+++ b/app/core/gimppickable.c
@@ -111,7 +111,7 @@ gimp_pickable_get_babl_format (GimpPickable *pickable)
 {
   GimpPickableInterface *pickable_iface;
 
-  g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), -1);
+  g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
 
   pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable);
 
@@ -121,6 +121,21 @@ gimp_pickable_get_babl_format (GimpPickable *pickable)
   return NULL;
 }
 
+const Babl *
+gimp_pickable_get_babl_format_with_alpha (GimpPickable *pickable)
+{
+  GimpPickableInterface *pickable_iface;
+
+  g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), NULL);
+
+  pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable);
+
+  if (pickable_iface->get_babl_format_with_alpha)
+    return pickable_iface->get_babl_format_with_alpha (pickable);
+
+  return NULL;
+}
+
 gint
 gimp_pickable_get_bytes (GimpPickable *pickable)
 {
diff --git a/app/core/gimppickable.h b/app/core/gimppickable.h
index 195a314..3ab755e 100644
--- a/app/core/gimppickable.h
+++ b/app/core/gimppickable.h
@@ -35,20 +35,21 @@ struct _GimpPickableInterface
   GTypeInterface base_iface;
 
   /*  virtual functions  */
-  void            (* flush)           (GimpPickable *pickable);
-  GimpImage     * (* get_image)       (GimpPickable *pickable);
-  const Babl    * (* get_babl_format) (GimpPickable *pickable);
-  GimpImageType   (* get_image_type)  (GimpPickable *pickable);
-  gint            (* get_bytes)       (GimpPickable *pickable);
-  GeglBuffer    * (* get_buffer)      (GimpPickable *pickable);
-  TileManager   * (* get_tiles)       (GimpPickable *pickable);
-  gboolean        (* get_pixel_at)    (GimpPickable *pickable,
-                                       gint          x,
-                                       gint          y,
-                                       guchar       *pixel);
-  gint            (* get_opacity_at)  (GimpPickable *pickable,
-                                       gint          x,
-                                       gint          y);
+  void            (* flush)                      (GimpPickable *pickable);
+  GimpImage     * (* get_image)                  (GimpPickable *pickable);
+  const Babl    * (* get_babl_format)            (GimpPickable *pickable);
+  const Babl    * (* get_babl_format_with_alpha) (GimpPickable *pickable);
+  GimpImageType   (* get_image_type)             (GimpPickable *pickable);
+  gint            (* get_bytes)                  (GimpPickable *pickable);
+  GeglBuffer    * (* get_buffer)                 (GimpPickable *pickable);
+  TileManager   * (* get_tiles)                  (GimpPickable *pickable);
+  gboolean        (* get_pixel_at)               (GimpPickable *pickable,
+                                                  gint          x,
+                                                  gint          y,
+                                                  guchar       *pixel);
+  gint            (* get_opacity_at)             (GimpPickable *pickable,
+                                                  gint          x,
+                                                  gint          y);
 };
 
 
@@ -57,6 +58,8 @@ GType           gimp_pickable_interface_get_type (void) G_GNUC_CONST;
 void            gimp_pickable_flush              (GimpPickable *pickable);
 GimpImage     * gimp_pickable_get_image          (GimpPickable *pickable);
 const Babl    * gimp_pickable_get_babl_format    (GimpPickable *pickable);
+const Babl    * gimp_pickable_get_babl_format_with_alpha
+                                                 (GimpPickable *pickable);
 GimpImageType   gimp_pickable_get_image_type     (GimpPickable *pickable);
 gint            gimp_pickable_get_bytes          (GimpPickable *pickable);
 GeglBuffer    * gimp_pickable_get_buffer         (GimpPickable *pickable);
diff --git a/app/core/gimpprojection.c b/app/core/gimpprojection.c
index 2de3323..6b660f5 100644
--- a/app/core/gimpprojection.c
+++ b/app/core/gimpprojection.c
@@ -162,15 +162,16 @@ gimp_projection_init (GimpProjection *proj)
 static void
 gimp_projection_pickable_iface_init (GimpPickableInterface *iface)
 {
-  iface->flush           = gimp_projection_pickable_flush;
-  iface->get_image       = gimp_projection_get_image;
-  iface->get_babl_format = gimp_projection_get_babl_format;
-  iface->get_image_type  = gimp_projection_get_image_type;
-  iface->get_bytes       = gimp_projection_get_bytes;
-  iface->get_buffer      = gimp_projection_get_buffer;
-  iface->get_tiles       = gimp_projection_get_tiles;
-  iface->get_pixel_at    = gimp_projection_get_pixel_at;
-  iface->get_opacity_at  = gimp_projection_get_opacity_at;
+  iface->flush                      = gimp_projection_pickable_flush;
+  iface->get_image                  = gimp_projection_get_image;
+  iface->get_babl_format            = gimp_projection_get_babl_format;
+  iface->get_babl_format_with_alpha = gimp_projection_get_babl_format; /* sic */
+  iface->get_image_type             = gimp_projection_get_image_type;
+  iface->get_bytes                  = gimp_projection_get_bytes;
+  iface->get_buffer                 = gimp_projection_get_buffer;
+  iface->get_tiles                  = gimp_projection_get_tiles;
+  iface->get_pixel_at               = gimp_projection_get_pixel_at;
+  iface->get_opacity_at             = gimp_projection_get_opacity_at;
 }
 
 static void