Add SpriteManager to get sprites from the cache.

runescape-api/src/main/java/net/runelite/rs/api/RSClient.java

@@ -26,6 +26,7 @@ package net.runelite.rs.api;
 
 import java.util.Map;
 import net.runelite.api.Client;
+import net.runelite.api.IndexDataBase;
 import net.runelite.api.SpritePixels;
 import net.runelite.api.World;
 import net.runelite.api.widgets.Widget;
@@ -305,6 +306,14 @@ public interface RSClient extends RSGameEngine, Client
 	@Import("createSprite")
 	RSSpritePixels createItemSprite(int itemId, int quantity, int thickness, int borderColor, int stackable, boolean noted);
 
+	@Import("getSpriteAsSpritePixels")
+	@Override
+	RSSpritePixels getSprite(IndexDataBase source, int archiveId, int fileId);
+
+	@Import("indexSprites")
+	@Override
+	RSIndexDataBase getIndexSprites();
+
 	@Import("widgetFlags")
 	@Override
 	RSHashTable getWidgetFlags();

runescape-api/src/main/java/net/runelite/rs/api/RSIndexDataBase.java

@@ -24,9 +24,10 @@
  */
 package net.runelite.rs.api;
 
+import net.runelite.api.IndexDataBase;
 import net.runelite.mapping.Import;
 
-public interface RSIndexDataBase
+public interface RSIndexDataBase extends IndexDataBase
 {
 	@Import("getConfigData")
 	byte[] getConfigData(int archiveId, int fileId);