3 files changed, 39 insertions, 31 deletions

diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp
index 3e7be26e59..350a8eb120 100644
--- a/indra/llimage/llimage.cpp
+++ b/indra/llimage/llimage.cpp
@@ -583,29 +583,39 @@ static void bilinear_scale(const U8 *src, U32 srcW, U32 srcH, U32 srcCh, U32 src
 // LLImage
 //---------------------------------------------------------------------------
 
-LLImage::LLImage(bool use_new_byte_range, S32 minimal_reverse_byte_range_percent)
+//static
+std::string LLImage::sLastErrorMessage;
+LLMutex* LLImage::sMutex = NULL;
+bool LLImage::sUseNewByteRange = false;
+S32  LLImage::sMinimalReverseByteRangePercent = 75;
+
+//static
+void LLImage::initClass(bool use_new_byte_range, S32 minimal_reverse_byte_range_percent)
 {
-    mMutex = new LLMutex();
-    mUseNewByteRange = use_new_byte_range;
-    mMinimalReverseByteRangePercent = minimal_reverse_byte_range_percent;
+	sUseNewByteRange = use_new_byte_range;
+    sMinimalReverseByteRangePercent = minimal_reverse_byte_range_percent;
+	sMutex = new LLMutex();
 }
 
-LLImage::~LLImage()
+//static
+void LLImage::cleanupClass()
 {
-    delete mMutex;
-    mMutex = NULL;
+	delete sMutex;
+	sMutex = NULL;
 }
 
-const std::string& LLImage::getLastErrorMessage()
+//static
+const std::string& LLImage::getLastError()
 {
 	static const std::string noerr("No Error");
-	return mLastErrorMessage.empty() ? noerr : mLastErrorMessage;
+	return sLastErrorMessage.empty() ? noerr : sLastErrorMessage;
 }
 
-void LLImage::setLastErrorMessage(const std::string& message)
+//static
+void LLImage::setLastError(const std::string& message)
 {
-	LLMutexLock m(mMutex);
-	mLastErrorMessage = message;
+	LLMutexLock m(sMutex);
+	sLastErrorMessage = message;
 }
 
 //---------------------------------------------------------------------------
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h
index 9f8d061293..f66b1666d7 100644
--- a/indra/llimage/llimage.h
+++ b/indra/llimage/llimage.h
@@ -30,7 +30,6 @@
 #include "lluuid.h"
 #include "llstring.h"
 #include "llpointer.h"
-#include "llsingleton.h"
 #include "lltrace.h"
 
 const S32 MIN_IMAGE_MIP =  2; // 4x4, only used for expand/contract power of 2
@@ -88,26 +87,25 @@ typedef enum e_image_codec
 
 //============================================================================
 // library initialization class
+// LLImage is frequently used in threads so do not convert it to LLSingleton
 
-class LLImage : public LLParamSingleton<LLImage>
+class LLImage
 {
-	LLSINGLETON(LLImage, bool use_new_byte_range = false, S32 minimal_reverse_byte_range_percent = 75);
-	~LLImage();
 public:
+	static void initClass(bool use_new_byte_range = false, S32 minimal_reverse_byte_range_percent = 75);
+	static void cleanupClass();
 
-	const std::string& getLastErrorMessage();
-	static const std::string& getLastError() { return getInstance()->getLastErrorMessage(); };
-	void setLastErrorMessage(const std::string& message);
-	static void setLastError(const std::string& message) { getInstance()->setLastErrorMessage(message); }
-
-	bool useNewByteRange() { return mUseNewByteRange; }
-	S32  getReverseByteRangePercent() { return mMinimalReverseByteRangePercent; }
-
-private:
-	LLMutex* mMutex;
-	std::string mLastErrorMessage;
-	bool mUseNewByteRange;
-	S32  mMinimalReverseByteRangePercent;
+	static const std::string& getLastError();
+	static void setLastError(const std::string& message);
+	
+	static bool useNewByteRange() { return sUseNewByteRange; }
+	static S32  getReverseByteRangePercent() { return sMinimalReverseByteRangePercent; }
+	
+protected:
+	static LLMutex* sMutex;
+	static std::string sLastErrorMessage;
+	static bool sUseNewByteRange;
+    static S32  sMinimalReverseByteRangePercent;
 };
 
 //============================================================================
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp
index 71cab0554d..4bff21610f 100644
--- a/indra/llimage/llimagej2c.cpp
+++ b/indra/llimage/llimagej2c.cpp
@@ -281,7 +281,7 @@ S32 LLImageJ2C::calcDataSizeJ2C(S32 w, S32 h, S32 comp, S32 discard_level, F32 r
 	S32 bytes;
 	S32 new_bytes = (S32) (sqrt((F32)(w*h))*(F32)(comp)*rate*1000.f/layer_factor);
 	S32 old_bytes = (S32)((F32)(w*h*comp)*rate);
-	bytes = (LLImage::getInstance()->useNewByteRange() && (new_bytes < old_bytes) ? new_bytes : old_bytes);
+	bytes = (LLImage::useNewByteRange() && (new_bytes < old_bytes) ? new_bytes : old_bytes);
 	bytes = llmax(bytes, calcHeaderSizeJ2C());
 	return bytes;
 }
@@ -322,7 +322,7 @@ S32 LLImageJ2C::calcDiscardLevelBytes(S32 bytes)
 	{
 		S32 bytes_needed = calcDataSize(discard_level);
 		// Use TextureReverseByteRange percent (see settings.xml) of the optimal size to qualify as correct rendering for the given discard level
-		if (bytes >= (bytes_needed*LLImage::getInstance()->getReverseByteRangePercent()/100))
+		if (bytes >= (bytes_needed*LLImage::getReverseByteRangePercent()/100))
 		{
 			break;
 		}