From bfa1ae051febf8954ce4b12b20c0880d03eaf261 Mon Sep 17 00:00:00 2001
From: "alonso.torres" <alonso.torres@kaleidos.net>
Date: Thu, 16 Apr 2026 16:07:49 +0200
Subject: [PATCH] :bug: Fix problem with dashboard thumbnails images

---
 frontend/src/app/main/render.cljs             |  4 ++-
 .../app/main/ui/workspace/viewport_wasm.cljs  |  2 +-
 frontend/src/app/render_wasm/api.cljs         | 31 +++++++++----------
 frontend/src/app/worker/thumbnails.cljs       |  5 ++-
 4 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/frontend/src/app/main/render.cljs b/frontend/src/app/main/render.cljs
index 6e40dbcbda..d60366592c 100644
--- a/frontend/src/app/main/render.cljs
+++ b/frontend/src/app/main/render.cljs
@@ -492,7 +492,9 @@
     (try
       (when (wasm.api/init-canvas-context os-canvas)
         (wasm.api/initialize-viewport
-         objects scale bounds "#000000" 0
+         objects scale bounds
+         :background-opacity 0
+         :on-render
          (fn []
            (wasm.api/render-sync-shape object-id)
            (ts/raf
diff --git a/frontend/src/app/main/ui/workspace/viewport_wasm.cljs b/frontend/src/app/main/ui/workspace/viewport_wasm.cljs
index e90a584baa..db9e1365ca 100644
--- a/frontend/src/app/main/ui/workspace/viewport_wasm.cljs
+++ b/frontend/src/app/main/ui/workspace/viewport_wasm.cljs
@@ -408,7 +408,7 @@
             (mf/set-ref-val! last-file-version-id-ref file-version-id))
           (when (and (some? file-version-id)
                      (not= file-version-id (mf/ref-val last-file-version-id-ref)))
-            (wasm.api/initialize-viewport base-objects zoom vbox background)
+            (wasm.api/initialize-viewport base-objects zoom vbox :background background)
             (mf/set-ref-val! last-file-version-id-ref file-version-id)))))
 
     (mf/with-effect [focus]
diff --git a/frontend/src/app/render_wasm/api.cljs b/frontend/src/app/render_wasm/api.cljs
index 4ed44bb67b..0178f8afa5 100644
--- a/frontend/src/app/render_wasm/api.cljs
+++ b/frontend/src/app/render_wasm/api.cljs
@@ -1398,14 +1398,14 @@
    loading begins, allowing callers to reveal the page content during
    transitions."
   ([objects]
-   (set-objects objects nil nil))
+   (set-objects objects nil nil false))
   ([objects render-callback]
-   (set-objects objects render-callback nil))
-  ([objects render-callback on-shapes-ready]
+   (set-objects objects render-callback nil false))
+  ([objects render-callback on-shapes-ready force-sync]
    (perf/begin-measure "set-objects")
    (let [shapes (shapes-in-tree-order objects)
          total-shapes (count shapes)]
-     (if (< total-shapes ASYNC_THRESHOLD)
+     (if (or force-sync (< total-shapes ASYNC_THRESHOLD))
        (set-objects-sync shapes render-callback on-shapes-ready)
        (do
          (begin-shapes-loading!)
@@ -1554,19 +1554,16 @@
         (request-render "set-modifiers")))))
 
 (defn initialize-viewport
-  ([base-objects zoom vbox background]
-   (initialize-viewport base-objects zoom vbox background 1 nil nil))
-  ([base-objects zoom vbox background callback]
-   (initialize-viewport base-objects zoom vbox background 1 callback nil))
-  ([base-objects zoom vbox background background-opacity callback]
-   (initialize-viewport base-objects zoom vbox background background-opacity callback nil))
-  ([base-objects zoom vbox background background-opacity callback on-shapes-ready]
-   (let [rgba         (sr-clr/hex->u32argb background background-opacity)
-         total-shapes (count (vals base-objects))]
-     (h/call wasm/internal-module "_set_canvas_background" rgba)
-     (h/call wasm/internal-module "_set_view" zoom (- (:x vbox)) (- (:y vbox)))
-     (h/call wasm/internal-module "_init_shapes_pool" total-shapes)
-     (set-objects base-objects callback on-shapes-ready))))
+  [base-objects zoom vbox &
+   {:keys [background background-opacity on-render on-shapes-ready force-sync]
+    :or {background-opacity 1}}]
+  (let [rgba (when background (sr-clr/hex->u32argb background background-opacity))
+        total-shapes (count (vals base-objects))]
+
+    (when rgba (h/call wasm/internal-module "_set_canvas_background" rgba))
+    (h/call wasm/internal-module "_set_view" zoom (- (:x vbox)) (- (:y vbox)))
+    (h/call wasm/internal-module "_init_shapes_pool" total-shapes)
+    (set-objects base-objects on-render on-shapes-ready force-sync)))
 
 (def ^:private default-context-options
   #js {:antialias false
diff --git a/frontend/src/app/worker/thumbnails.cljs b/frontend/src/app/worker/thumbnails.cljs
index 70d8216d14..d90536619d 100644
--- a/frontend/src/app/worker/thumbnails.cljs
+++ b/frontend/src/app/worker/thumbnails.cljs
@@ -171,7 +171,10 @@
                        zoom    (/ width (:width vbox))]
 
                    (wasm.api/initialize-viewport
-                    objects zoom vbox bgcolor
+                    objects zoom vbox
+                    :background bgcolor
+                    :force-sync true
+                    :on-render
                     (fn []
                       (if frame
                         (wasm.api/render-sync-shape (:id frame))