1 files changed, 68 insertions, 0 deletions

diff --git a/Tools/QtBiomeVisualiser/ChunkCache.h b/Tools/QtBiomeVisualiser/ChunkCache.h
new file mode 100644
index 000000000..0efa7fc39
--- /dev/null
+++ b/Tools/QtBiomeVisualiser/ChunkCache.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include <QObject>
+#include <QCache>
+#include <QMutex>
+
+
+
+
+
+class Chunk;
+typedef std::shared_ptr<Chunk> ChunkPtr;
+
+class ChunkSource;
+
+
+
+
+
+/** Caches chunk data for reuse */
+class ChunkCache :
+	public QObject
+{
+	typedef QObject super;
+	Q_OBJECT
+
+public:
+	explicit ChunkCache(QObject * parent = NULL);
+
+	/** Retrieves the specified chunk from the cache.
+	Only returns valid chunks; if the chunk is invalid, queues it for rendering and returns an empty ptr. */
+	ChunkPtr fetch(int a_ChunkX, int a_ChunkZ);
+
+	/** Replaces the chunk source used by the biome view to get the chunk biome data.
+	The cache is then invalidated. */
+	void setChunkSource(std::shared_ptr<ChunkSource> a_ChunkSource);
+
+	/** Returns true iff the chunk source has been initialized. */
+	bool hasData(void) const { return (m_ChunkSource.get() != nullptr); }
+
+signals:
+	void chunkAvailable(int a_ChunkX, int a_ChunkZ);
+
+protected slots:
+	void gotChunk(int a_ChunkX, int a_ChunkZ);
+
+protected:
+	/** The cache of the chunks */
+	QCache<quint32, ChunkPtr> m_Cache;
+
+	/** Locks te cache against multithreaded access */
+	QMutex m_Mtx;
+
+	/** The source used to get the biome data. */
+	std::shared_ptr<ChunkSource> m_ChunkSource;
+
+
+	/** Returns the hash used by the chunk in the cache */
+	quint32 getChunkHash(int a_ChunkX, int a_ChunkZ);
+
+	/** Queues the specified chunk for rendering by m_ChunkSource. */
+	void queueChunkRender(int a_ChunkX, int a_ChunkZ, ChunkPtr & a_Chunk);
+};
+
+
+
+
+