Préserver les GIF animés lors des transformations d'images

themes/2026/layouts/_partials/media/display-img.html

@@ -15,13 +15,21 @@
     {{- if gt $image.Width $maxWidth -}}
       {{- $targetWidth = $maxWidth -}}
     {{- end -}}
-    {{- $display = $image.Resize (printf "%dx webp q80" $targetWidth) -}}
+    {{- $display = partial "media/process-image.html" (dict
+      "image" $image
+      "action" "Resize"
+      "spec" (printf "%dx" $targetWidth)
+    ) -}}
   {{- else -}}
     {{- $targetHeight := $image.Height -}}
     {{- if gt $image.Height 900 -}}
       {{- $targetHeight = 900 -}}
     {{- end -}}
-    {{- $display = $image.Resize (printf "x%d webp q80" $targetHeight) -}}
+    {{- $display = partial "media/process-image.html" (dict
+      "image" $image
+      "action" "Resize"
+      "spec" (printf "x%d" $targetHeight)
+    ) -}}
   {{- end -}}
 {{- end -}}
 

themes/2026/layouts/_partials/media/process-image.html

@@ -0,0 +1,30 @@
+{{/* Préserve les GIF animés en évitant toute transformation Hugo. */}}
+{{- $image := .image -}}
+{{- if not $image -}}
+  {{- errorf "media/process-image.html: missing image resource" -}}
+{{- end -}}
+
+{{- $action := .action -}}
+{{- if not $action -}}
+  {{- errorf "media/process-image.html: missing image action for %q" $image.Name -}}
+{{- end -}}
+
+{{- $spec := .spec -}}
+{{- if not $spec -}}
+  {{- errorf "media/process-image.html: missing image spec for %q" $image.Name -}}
+{{- end -}}
+
+{{- $result := $image -}}
+{{- $subType := lower $image.MediaType.SubType -}}
+{{- if and (ne $subType "svg") (ne $subType "gif") -}}
+  {{- $options := printf "%s webp q80" $spec -}}
+  {{- if eq $action "Fill" -}}
+    {{- $result = $image.Fill $options -}}
+  {{- else if eq $action "Resize" -}}
+    {{- $result = $image.Resize $options -}}
+  {{- else -}}
+    {{- errorf "media/process-image.html: unsupported image action %q for %q" $action $image.Name -}}
+  {{- end -}}
+{{- end -}}
+
+{{- return $result -}}