[gegl] buffer: inherit tile size from backend or source

[Daniel Sabo <daniels src gnome org>]

commit 34aa572351788bafd4238bfd0e09147ab9dca17f
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Wed Sep 11 21:43:53 2013 -0700

    buffer: inherit tile size from backend or source

 gegl/buffer/gegl-buffer.c       |   20 ++++++++++++++++++--
 gegl/buffer/gegl-tile-backend.c |   11 +++++++++++
 gegl/buffer/gegl-tile-backend.h |   16 ++++++++++++++++
 3 files changed, 45 insertions(+), 2 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer.c b/gegl/buffer/gegl-buffer.c
index 47af575..07476d7 100644
--- a/gegl/buffer/gegl-buffer.c
+++ b/gegl/buffer/gegl-buffer.c
@@ -569,16 +569,29 @@ gegl_buffer_constructor (GType                  type,
   if (source)
     {
       if (GEGL_IS_TILE_STORAGE (source))
-        buffer->format = GEGL_TILE_STORAGE (source)->format;
+        {
+          GeglTileStorage *src_storage = GEGL_TILE_STORAGE (source);
+          buffer->format      = src_storage->format;
+          buffer->tile_width  = src_storage->tile_width;
+          buffer->tile_height = src_storage->tile_height;
+        }
       else if (GEGL_IS_BUFFER (source))
-        buffer->format = GEGL_BUFFER (source)->format;
+        {
+          GeglBuffer *src_buffer = GEGL_BUFFER (source);
+          buffer->format      = src_buffer->format;
+          buffer->tile_width  = src_buffer->tile_width;
+          buffer->tile_height = src_buffer->tile_height;
+        }
     }
   else
     {
       if (buffer->backend)
         {
           backend = buffer->backend;
+
           buffer->format = gegl_tile_backend_get_format (backend);
+          buffer->tile_width = gegl_tile_backend_get_tile_width (backend);
+          buffer->tile_height = gegl_tile_backend_get_tile_height (backend);
         }
       else
         {
@@ -768,6 +781,9 @@ gegl_buffer_constructor (GType                  type,
    */
   buffer->soft_format = buffer->format;
 
+  g_assert (buffer->tile_width == buffer->tile_storage->tile_width);
+  g_assert (buffer->tile_height == buffer->tile_storage->tile_height);
+
   return object;
 }
 
diff --git a/gegl/buffer/gegl-tile-backend.c b/gegl/buffer/gegl-tile-backend.c
index 9b1054d..aa49fcd 100644
--- a/gegl/buffer/gegl-tile-backend.c
+++ b/gegl/buffer/gegl-tile-backend.c
@@ -183,6 +183,17 @@ gegl_tile_backend_get_tile_size (GeglTileBackend *tile_backend)
   return tile_backend->priv->tile_size;
 }
 
+gint
+gegl_tile_backend_get_tile_width (GeglTileBackend *tile_backend)
+{
+  return tile_backend->priv->tile_width;
+}
+
+gint
+gegl_tile_backend_get_tile_height (GeglTileBackend *tile_backend)
+{
+  return tile_backend->priv->tile_height;
+}
 
 const Babl *
 gegl_tile_backend_get_format (GeglTileBackend *tile_backend)
diff --git a/gegl/buffer/gegl-tile-backend.h b/gegl/buffer/gegl-tile-backend.h
index 9ccfa28..537e667 100644
--- a/gegl/buffer/gegl-tile-backend.h
+++ b/gegl/buffer/gegl-tile-backend.h
@@ -59,6 +59,22 @@ struct _GeglTileBackendClass
 gint        gegl_tile_backend_get_tile_size (GeglTileBackend *tile_backend);
 
 /**
+ * gegl_tile_backend_get_tile_width:
+ * @tile_backend: a #GeglTileBackend
+ *
+ * Return value: the width of tile from this backend
+ */
+gint        gegl_tile_backend_get_tile_width (GeglTileBackend *tile_backend);
+
+/**
+ * gegl_tile_backend_get_tile_height:
+ * @tile_backend: a #GeglTileBackend
+ *
+ * Return value: the height of tile from this backend
+ */
+gint        gegl_tile_backend_get_tile_height (GeglTileBackend *tile_backend);
+
+/**
  * gegl_tile_backend_get_format: (skip)
  * @tile_backend: a #GeglTileBackend
  *