Copy source metadata when running neural denoise/upscale

dev-doc/AI.md

@@ -497,8 +497,9 @@ for each task, see **[AI_Tasks.md](AI_Tasks.md)**.
 The neural-restore consumer (denoise / upscale / rawdenoise) writes
 its output to a sibling file (TIFF or DNG), then auto-imports it via
 `_import_image` in `neural_restore.c`. The new image is grouped with
-its source and inherits the source's user-applied tags so the output
-shows up in tag-based collections that contained the source.
+its source and inherits the source's user-applied tags, rating, color
+labels, and other metadata so the output appears in any filtered views
+or collections where the source image does.
 
 ---
 

src/libs/neural_restore.c

@@ -201,6 +201,8 @@
 #include "common/film.h"
 #include "common/grouping.h"
 #include "common/image_cache.h"
+#include "common/colorlabels.h"
+#include "common/metadata.h"
 #include "common/mipmap_cache.h"
 #include "common/tags.h"
 #include "control/jobs/control_jobs.h"
@@ -995,6 +997,51 @@ static void _import_image(const char *filename,
     dt_print(DT_DEBUG_AI, "[neural_restore] imported imgid=%d: %s", newid, filename);
     if(dt_is_valid_imgid(source_imgid))
     {
+      // retrieve and copy image rating from the source image
+      const dt_image_t *src_rate = dt_image_cache_get(source_imgid, 'r');
+      if(src_rate)
+      {
+        const int rating = dt_image_get_xmp_rating(src_rate);
+        dt_image_cache_read_release(src_rate);
+        dt_image_t *img = dt_image_cache_get(newid, 'w');
+        if(img)
+        {
+          dt_image_set_xmp_rating(img, rating);
+          dt_image_cache_write_release(img, DT_IMAGE_CACHE_SAFE);
+        }
+      }
+
+      // retrieve and copy color labels from the source image
+      const int color_labels = dt_colorlabels_get_labels(source_imgid);
+      for(int color = 0; color < DT_COLORLABELS_LAST; color++)
+      {
+        if(color_labels & (1 << color))
+        {
+          dt_colorlabels_set_label(newid, color);
+        }
+      }
+
+      // retrieve and copy manual geolocation metadata
+      dt_image_geoloc_t geoloc;
+      geoloc.longitude = NAN;
+      geoloc.latitude = NAN;
+      geoloc.elevation = NAN;
+      dt_image_get_location(source_imgid, &geoloc);
+      if(!isnan(geoloc.longitude) && !isnan(geoloc.latitude))
+      {
+        dt_image_set_location(newid, &geoloc, FALSE, FALSE);
+      }
+
+      // retrieve and copy database-only metadata like title, description, etc.
+      GList *meta = dt_metadata_get_list_id(source_imgid);
+      if(meta)
+      {
+        GList *imgs = g_list_append(NULL, GINT_TO_POINTER(newid));
+        dt_metadata_set_list_id(imgs, meta, FALSE, FALSE);
+        g_list_free(imgs);
+        g_list_free_full(meta, g_free);
+      }
+
       dt_grouping_add_to_group(source_imgid, newid);
       // promote the output as group leader, but only when the source
       // was the current leader — preserves any manually-set leader the
@@ -1016,6 +1063,10 @@ static void _import_image(const char *filename,
         g_list_free(targets);
       }
       dt_tag_free_result(&src_tags);
+
+      // sync metadata changes to sidecar files and trigger UI updates
+      dt_image_synch_xmp(newid);
+      DT_CONTROL_SIGNAL_RAISE(DT_SIGNAL_METADATA_CHANGED, DT_METADATA_SIGNAL_NEW_VALUE);
     }
     // refresh the collection so the new image appears in the thumb grid
     dt_collection_update_query(darktable.collection,