DNA Splicers WIP

Data/Scripts/998_InfiniteFusion/Sprites/001_PifSpriteBitmapCache.rb

@@ -0,0 +1,52 @@
+class SpritesBitmapCache
+  @@cache = {} # Cache storage for individual sprites
+  @@usage_order = [] # Tracks usage order for LRU eviction
+
+  def getCache()
+    return @@cache
+  end
+
+  def get_bitmap(pif_sprite)
+    sprite_key = get_cache_key(pif_sprite)
+    if @@cache.key?(sprite_key)
+      mark_key_as_recently_used(sprite_key)
+      return @@cache[sprite_key].clone
+    end
+    return nil
+  end
+
+  def mark_key_as_recently_used(sprite_key)
+    @@usage_order.delete(sprite_key)
+    @@usage_order << sprite_key
+  end
+
+  #Keys format: [type]_B[body]H[head]_letter
+  # ex:
+  # AUTOGEN_B12H12_
+  # CUSTOM_B12H12_a
+  # BASE_BH12_a
+  # etc.
+  def get_cache_key(pif_sprite)
+    return "#{pif_sprite.type.to_s}_B#{pif_sprite.body_id}H#{pif_sprite.head_id}_#{pif_sprite.alt_letter}".to_sym
+  end
+
+  #Keys format: AUTOGEN_B12H12_a
+  def add(pif_sprite,bitmap)
+    sprite_key = get_cache_key(pif_sprite)
+    echoln "adding key #{sprite_key} to cache"
+    @@cache[sprite_key] = bitmap.clone
+
+    if @@cache.size >= Settings::SPRITE_CACHE_MAX_NB
+      # Evict least recently used (first in order)
+      oldest_key = @@usage_order.shift
+      @@cache.delete(oldest_key)
+      echoln "Evicted: #{oldest_key} from sprite cache"
+    end
+    @@usage_order << sprite_key
+  end
+
+  def clear
+    @@cache = {}
+    @@usage_order = []
+  end
+end