[gegl] buffer: store encoding instead of format name in gegl_buffer_save

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 379e9b3db83139249215c8d3b14b59743d580467
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue May 14 23:24:13 2019 +0200

    buffer: store encoding instead of format name in gegl_buffer_save
    
    This makes loading code not crash when loading buffers that have been saved
    with a non NULL/sRGB space.
    
    As a reminder that we are losing space information we warn in the instances
    when it happens.

 gegl/buffer/gegl-buffer-save.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-save.c b/gegl/buffer/gegl-buffer-save.c
index b020fe8f5..8b5450eb2 100644
--- a/gegl/buffer/gegl-buffer-save.c
+++ b/gegl/buffer/gegl-buffer-save.c
@@ -89,7 +89,7 @@ static gsize write_block (SaveInfo        *info,
          info->in_holding->next = 0;
 
        ret = write (info->o, info->in_holding, info->in_holding->length);
-          if (ret == -1)
+       if (ret == -1)
          ret = 0;
        info->offset += ret;
        g_assert (allocated_pos == info->offset);
@@ -177,13 +177,19 @@ gegl_buffer_header_init (GeglBufferHeader *header,
     gchar buf[64] = { 0, };
 
     g_snprintf (buf, 64, "%s%c\n%i×%i %ibpp\n%ix%i\n\n\n\n\n\n\n\n\n",
-          babl_get_name (format), 0,
+          babl_format_get_encoding (format), 0,
           header->tile_width,
           header->tile_height,
           header->bytes_per_pixel,
           (gint)header->width,
           (gint)header->height);
     memcpy ((header->description), buf, 64);
+
+
+    if (strcmp (babl_get_name (format), babl_format_get_encoding (format)))
+    {
+      g_warning ("storing a geglbuffer with non sRGB space, we should store the space in a separate ICC 
block.");
+    }
   }
 }
 
@@ -310,7 +316,7 @@ gegl_buffer_save (GeglBuffer          *buffer,
   /* save the header */
   {
     ssize_t ret = write (info->o, &info->header, sizeof (GeglBufferHeader));
-       if (ret != -1)
+    if (ret != -1)
       info->offset += ret;
   }
   g_assert (info->offset == info->header.next);
@@ -353,7 +359,7 @@ gegl_buffer_save (GeglBuffer          *buffer,
         g_assert (info->offset == entry->offset);
         {
           ssize_t ret = write (info->o, data, info->tile_size);
-             if (ret != -1)
+          if (ret != -1)
             info->offset += ret;
         }
         gegl_tile_unref (tile);