[shotwell/wip/gtk4] Fix missing image placeholder

[Jens Georg <jensgeorg src gnome org>]

commit 69967f78d354a88bf8a4d35365d4dfb3a7f6fb67
Author: Jens Georg <mail jensge org>
Date:   Wed Apr 13 21:57:09 2022 +0200

    Fix missing image placeholder

 src/PhotoPage.vala         |  2 +-
 src/camera/ImportPage.vala |  4 ++--
 src/util/image.vala        | 17 +++++------------
 3 files changed, 8 insertions(+), 15 deletions(-)
---
diff --git a/src/PhotoPage.vala b/src/PhotoPage.vala
index e5fcf5d3..040392c9 100644
--- a/src/PhotoPage.vala
+++ b/src/PhotoPage.vala
@@ -1175,7 +1175,7 @@ public abstract class EditingHostPage : SinglePhotoPage {
             }
         }
         if (pixbuf == null) {
-            //pixbuf = get_placeholder_pixbuf();
+            pixbuf = get_placeholder_pixbuf();
             get_canvas_scaling().perform_on_pixbuf(pixbuf, Gdk.InterpType.NEAREST, true);
         }
         return pixbuf;
diff --git a/src/camera/ImportPage.vala b/src/camera/ImportPage.vala
index 724dcc45..49e3a8c0 100644
--- a/src/camera/ImportPage.vala
+++ b/src/camera/ImportPage.vala
@@ -280,16 +280,16 @@ class ImportPreview : MediaSourceItem {
         } catch (Error err) {
             warning("Unable to fetch loaded import preview for %s: %s", to_string(), err.message);
         }
+
+        print ("======> pixbuf? %p\n", pixbuf);
         
         // use placeholder if no preview available
         bool using_placeholder = (pixbuf == null);
         if (pixbuf == null) {
             if (placeholder_preview == null) {
-            #if 0
                 placeholder_preview = get_placeholder_pixbuf();
                 placeholder_preview = scale_pixbuf(placeholder_preview, MAX_SCALE,
                     Gdk.InterpType.BILINEAR, true);
-                    #endif
             }
             
             pixbuf = placeholder_preview;
diff --git a/src/util/image.vala b/src/util/image.vala
index 2d8e9bf1..946a5429 100644
--- a/src/util/image.vala
+++ b/src/util/image.vala
@@ -24,21 +24,14 @@ void set_source_color_from_string(Cairo.Context ctx, string spec) {
 private const int MIN_SCALED_WIDTH = 10;
 private const int MIN_SCALED_HEIGHT = 10;
 
-Gdk.Paintable get_placeholder_pixbuf () {
+Gdk.Pixbuf get_placeholder_pixbuf () {
     // Create empty pixbuf.
-    Gdk.Paintable? pixbuf = null;
+    Gdk.Pixbuf? pixbuf = null;
 
     try {
-        var icon_theme = Gtk.IconTheme.get_for_display (Gdk.Display.get_default());
-        pixbuf = icon_theme.lookup_icon("image-missing", null,
-                Gtk.IconSize.LARGE, 0, Gtk.TextDirection.NONE, 0);
-    } catch (Error error) {
-        try {
-            pixbuf = Gdk.Texture.from_resource("/org/gnome/Shotwell/icons/image-missing.png");
-        } catch (Error err) {
-            warning("Could not load fall-back icon: %s", err.message);
-        }
-        warning("Could not load icon from theme: %s", error.message);
+        pixbuf = new Gdk.Pixbuf.from_resource("/org/gnome/Shotwell/icons/image-missing.png");
+    } catch (Error err) {
+        warning("Could not load fall-back icon: %s", err.message);
     }
 
     return pixbuf;