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-rw-r--r--Tools/QtBiomeVisualiser/ChunkSource.cpp57
-rw-r--r--Tools/QtBiomeVisualiser/ChunkSource.h24
2 files changed, 72 insertions, 9 deletions
diff --git a/Tools/QtBiomeVisualiser/ChunkSource.cpp b/Tools/QtBiomeVisualiser/ChunkSource.cpp
index d9660b886..ea3346f04 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.cpp
+++ b/Tools/QtBiomeVisualiser/ChunkSource.cpp
@@ -27,10 +27,10 @@ BioGenSource::BioGenSource(cIniFilePtr a_IniFile) :
void BioGenSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChunk)
{
cChunkDef::BiomeMap biomes;
- {
- QMutexLocker lock(&m_Mtx);
- m_BiomeGen->GenBiomes(a_ChunkX, a_ChunkZ, biomes);
- }
+ int tag;
+ cBiomeGenPtr biomeGen = getBiomeGen(tag);
+ biomeGen->GenBiomes(a_ChunkX, a_ChunkZ, biomes);
+ releaseBiomeGen(std::move(biomeGen), tag);
a_DestChunk.setBiomes(biomes);
}
@@ -40,10 +40,53 @@ void BioGenSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, Chunk & a_DestChun
void BioGenSource::reload()
{
- int seed = m_IniFile->GetValueSetI("Seed", "Seed", 0);
- bool unused = false;
QMutexLocker lock(&m_Mtx);
- m_BiomeGen = cBiomeGen::CreateBiomeGen(*m_IniFile, seed, unused);
+ m_CurrentTag += 1;
+ m_BiomeGens.clear();
+}
+
+
+
+
+
+cBiomeGenPtr BioGenSource::getBiomeGen(int & a_Tag)
+{
+ QMutexLocker lock(&m_Mtx);
+ a_Tag = m_CurrentTag;
+ if (m_BiomeGens.empty())
+ {
+ // Create a new biogen:
+ lock.unlock();
+ int seed = m_IniFile->GetValueSetI("Seed", "Seed", 0);
+ bool unused;
+ cBiomeGenPtr res = cBiomeGen::CreateBiomeGen(*m_IniFile, seed, unused);
+ return res;
+ }
+ else
+ {
+ // Return an existing biogen:
+ cBiomeGenPtr res = m_BiomeGens.back();
+ m_BiomeGens.pop_back();
+ return res;
+ }
+}
+
+
+
+
+
+void BioGenSource::releaseBiomeGen(cBiomeGenPtr && a_BiomeGen, int a_Tag)
+{
+ QMutexLocker lock(&m_Mtx);
+
+ // If the tag differs, the source has been reloaded and this biogen is old, dispose:
+ if (a_Tag != m_CurrentTag)
+ {
+ return;
+ }
+
+ // The tag is the same, put the biogen back to list:
+ m_BiomeGens.push_back(std::move(a_BiomeGen));
}
diff --git a/Tools/QtBiomeVisualiser/ChunkSource.h b/Tools/QtBiomeVisualiser/ChunkSource.h
index a6bc3849b..62f9b5626 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.h
+++ b/Tools/QtBiomeVisualiser/ChunkSource.h
@@ -53,10 +53,30 @@ protected:
cIniFilePtr m_IniFile;
/** The generator used for generating biomes. */
- cBiomeGenPtr m_BiomeGen;
+ std::vector<cBiomeGenPtr> m_BiomeGens;
- /** Guards m_BiomeGen against multithreaded access. */
+ /** Guards m_BiomeGens against multithreaded access. */
QMutex m_Mtx;
+
+ /** Keeps track of the current settings of the biomegens.
+ Incremented by one each time reload() is called. Provides the means of releasing old biomegens that were
+ in use while reload() was being processed and thus couldn't be changed back then. releaseBiomeGen() does
+ the job of filtering the biogens before reusing them. */
+ int m_CurrentTag;
+
+
+ /** Retrieves one cBiomeGenPtr from m_BiomeGens.
+ If there's no biogen available there, creates a new one based on the ini file.
+ When done with it, the caller should call releaseBiomeGen() to put the biogen back to m_BiomeGens.
+ a_Tag receives the value of m_CurrentTag from when the lock was held; it should be passed to
+ releaseBiomeGen() together with the biogen. */
+ cBiomeGenPtr getBiomeGen(int & a_Tag);
+
+ /** Marks the specified biogen as available for reuse (puts it back into m_BiomeGens).
+ a_Tag is the value of m_CurrentTag from the time when the biogen was retrieved; if it is different from
+ current m_CurrentTagValue, the biogen will be disposed of (because reload() has been called in the
+ meantime). */
+ void releaseBiomeGen(cBiomeGenPtr && a_BiomeGen, int a_Tag);
};