[gegl] buffer, stats: add zoom-total GeglStats property

[Øyvind Kolås <ok src gnome org>]

commit 2c84bd1e54ff8bb691ecfa4d45cb415edf57589a
Author: Ell <ell_se yahoo com>
Date:   Thu Mar 29 17:40:01 2018 -0400

    buffer, stats: add zoom-total GeglStats property
    
    ... which reports the total size of the data processed by the zoom
    tile handler.

 gegl/buffer/gegl-tile-handler-zoom.c |   18 ++++++++++++++++++
 gegl/buffer/gegl-tile-handler-zoom.h |    3 +++
 gegl/gegl-stats.c                    |   16 +++++++++++++++-
 3 files changed, 36 insertions(+), 1 deletions(-)
---
diff --git a/gegl/buffer/gegl-tile-handler-zoom.c b/gegl/buffer/gegl-tile-handler-zoom.c
index dd1d25c..a8037de 100644
--- a/gegl/buffer/gegl-tile-handler-zoom.c
+++ b/gegl/buffer/gegl-tile-handler-zoom.c
@@ -35,6 +35,8 @@
 G_DEFINE_TYPE (GeglTileHandlerZoom, gegl_tile_handler_zoom,
                GEGL_TYPE_TILE_HANDLER)
 
+static guint64 total_size = 0;
+
 static inline void set_blank (GeglTile   *dst_tile,
                               gint        width,
                               gint        height,
@@ -55,6 +57,8 @@ static inline void set_blank (GeglTile   *dst_tile,
       memset (dst, 0x0, bytes);
       dst += rowstride;
     }
+
+  total_size += (height / 2) * bytes;
 }
 
 static inline void set_half (GeglTileHandlerZoom *zoom,
@@ -77,6 +81,8 @@ static inline void set_half (GeglTileHandlerZoom *zoom,
     zoom->downscale_2x2 = gegl_downscale_2x2_get_fun (format);
 
   zoom->downscale_2x2 (format, width, height, src_data, width * bpp, dst_data, width * bpp);
+
+  total_size += (width / 2) * (height / 2) * bpp;
 }
 
 static GeglTile *
@@ -190,3 +196,15 @@ gegl_tile_handler_zoom_new (GeglTileBackend *backend)
 
   return (void*)ret;
 }
+
+guint64
+gegl_tile_handler_zoom_get_total (void)
+{
+  return total_size;
+}
+
+void
+gegl_tile_handler_zoom_reset_stats (void)
+{
+  total_size = 0;
+}
diff --git a/gegl/buffer/gegl-tile-handler-zoom.h b/gegl/buffer/gegl-tile-handler-zoom.h
index 13906c4..ca8b191 100644
--- a/gegl/buffer/gegl-tile-handler-zoom.h
+++ b/gegl/buffer/gegl-tile-handler-zoom.h
@@ -64,6 +64,9 @@ GType             gegl_tile_handler_zoom_get_type (void) G_GNUC_CONST;
 
 GeglTileHandler * gegl_tile_handler_zoom_new      (GeglTileBackend *backend);
 
+guint64           gegl_tile_handler_zoom_get_total   (void);
+void              gegl_tile_handler_zoom_reset_stats (void);
+
 G_END_DECLS
 
 #endif
diff --git a/gegl/gegl-stats.c b/gegl/gegl-stats.c
index 0afc5d2..f76b571 100644
--- a/gegl/gegl-stats.c
+++ b/gegl/gegl-stats.c
@@ -24,6 +24,7 @@
 #include "gegl-types-internal.h"
 #include "buffer/gegl-buffer-types.h"
 #include "buffer/gegl-tile-handler-cache.h"
+#include "buffer/gegl-tile-handler-zoom.h"
 #include "buffer/gegl-tile-backend-swap.h"
 #include "gegl-stats.h"
 
@@ -38,7 +39,8 @@ enum
   PROP_TILE_CACHE_MISSES,
   PROP_SWAP_TOTAL,
   PROP_SWAP_FILE_SIZE,
-  PROP_SWAP_BUSY
+  PROP_SWAP_BUSY,
+  PROP_ZOOM_TOTAL
 };
 
 
@@ -118,6 +120,13 @@ gegl_stats_class_init (GeglStatsClass *klass)
                                                          "Whether there is work queued for the swap",
                                                          FALSE,
                                                          G_PARAM_READABLE));
+
+  g_object_class_install_property (object_class, PROP_ZOOM_TOTAL,
+                                   g_param_spec_uint64 ("zoom-total",
+                                                        "Zoom total",
+                                                        "Total size of data processed by the zoom tile 
handler",
+                                                        0, G_MAXUINT64, 0,
+                                                        G_PARAM_READABLE));
 }
 
 static void
@@ -179,6 +188,10 @@ gegl_stats_get_property (GObject    *object,
         g_value_set_boolean (value, gegl_tile_backend_swap_get_busy ());
         break;
 
+      case PROP_ZOOM_TOTAL:
+        g_value_set_uint64 (value, gegl_tile_handler_zoom_get_total ());
+        break;
+
       default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
         break;
@@ -189,4 +202,5 @@ void
 gegl_stats_reset (GeglStats *stats)
 {
   gegl_tile_handler_cache_reset_stats ();
+  gegl_tile_handler_zoom_reset_stats ();
 }