Fix perfomance issue with caching complex sprites.

1 files changed, 26 insertions, 1 deletions

diff --git a/src/compoundsprite.h b/src/compoundsprite.h
index 834ccd835..0841bcfb8 100644
--- a/src/compoundsprite.h
+++ b/src/compoundsprite.h
@@ -24,10 +24,26 @@
 
 #include "sprite.h"
 
+#include <list>
 #include <vector>
 
 class Image;
 
+typedef std::list <void*> VectorPointers;
+
+class CompoundItem
+{
+    public:
+        CompoundItem();
+
+        ~CompoundItem();
+
+//        float alpha;
+        VectorPointers data;
+        Image *image;
+        Image *alphaImage;
+};
+
 class CompoundSprite : public Sprite, private std::vector<Sprite*>
 {
 public:
@@ -101,9 +117,18 @@ public:
     virtual void setAlpha(float alpha);
 
 private:
-
     void redraw() const;
 
+    void updateImages() const;
+
+    bool updateFromCache() const;
+
+    void initCurrentCacheItem() const;
+
+    typedef std::list<CompoundItem*> ImagesCache;
+    mutable ImagesCache imagesCache;
+    mutable CompoundItem *mCacheItem;
+
     mutable Image *mImage;
     mutable Image *mAlphaImage;