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author | Howaner <franzi.moos@googlemail.com> | 2014-09-23 14:39:49 +0200 |
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committer | Howaner <franzi.moos@googlemail.com> | 2014-09-23 14:39:49 +0200 |
commit | 4b38e077cf8d27d1c7ef26d4148f7825c5aeaabd (patch) | |
tree | cd86062eb50ba870f73b6f29dec0205f87205bf8 /Tools/QtBiomeVisualiser/ChunkCache.h | |
parent | Merge branch 'master' into EntityCustomName (diff) | |
parent | QtBiomeVisualiser: Fixed confusion about Globals.h. (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | Tools/QtBiomeVisualiser/ChunkCache.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Tools/QtBiomeVisualiser/ChunkCache.h b/Tools/QtBiomeVisualiser/ChunkCache.h new file mode 100644 index 000000000..8d198f02f --- /dev/null +++ b/Tools/QtBiomeVisualiser/ChunkCache.h @@ -0,0 +1,72 @@ +#pragma once + +#include <QObject> +#include <QCache> +#include <QMutex> +#include <memory> + + + + + +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() const { return (m_ChunkSource.get() != nullptr); } + + /** Reloads the current chunk source. */ + void reload(); + +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); +}; + + + + + |