cache display object as it is written in SWF documentation (placeobject cache flag or has filters)

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/SWF.java

@@ -328,6 +328,9 @@ public final class SWF implements SWFContainerItem, Timelined {
     @Internal
     private final Cache<String, SerializableImage> frameCache = Cache.getInstance(false, false, "frame");
 
+    @Internal
+    private final Cache<PlaceObjectTypeTag, SerializableImage> displayObjectCache = Cache.getInstance(false, false, "displayObject");
+
     @Internal
     private final Cache<CharacterTag, RECT> rectCache = Cache.getInstance(true, true, "rect");
 
@@ -399,6 +402,7 @@ public final class SWF implements SWFContainerItem, Timelined {
         as2Cache.clear();
         as3Cache.clear();
         frameCache.clear();
+        displayObjectCache.clear();
         soundCache.clear();
 
         timeline = null;
@@ -2483,6 +2487,13 @@ public final class SWF implements SWFContainerItem, Timelined {
         return null;
     }
 
+    public SerializableImage getFromCache(PlaceObjectTypeTag key) {
+        if (displayObjectCache.contains(key)) {
+            return displayObjectCache.get(key);
+        }
+        return null;
+    }
+
     public byte[] getFromCache(SoundTag soundTag) {
         if (soundCache.contains(soundTag)) {
             return soundCache.get(soundTag);
@@ -2496,12 +2507,17 @@ public final class SWF implements SWFContainerItem, Timelined {
         }
     }
 
+    public void putToCache(PlaceObjectTypeTag key, SerializableImage img) {
+        displayObjectCache.put(key, img);
+    }
+
     public void putToCache(SoundTag soundTag, byte[] data) {
         soundCache.put(soundTag, data);
     }
 
     public void clearImageCache() {
         frameCache.clear();
+        displayObjectCache.clear();
         rectCache.clear();
         for (Tag tag : getTags()) {
             if (tag instanceof ImageTag) {