[SL-711] - Eliminate some overheads in texturecache.

- Eliminate memory overhead when need duplicated scaled image.
- Small improvement in LLImageBase::getCodecFromExtension()

2 files changed, 3 insertions, 7 deletions

diff --git a/indra/newview/lltexturecache.cpp b/indra/newview/lltexturecache.cpp
index e8b3842ae5..f0c28041d1 100644
--- a/indra/newview/lltexturecache.cpp
+++ b/indra/newview/lltexturecache.cpp
@@ -1987,15 +1987,13 @@ bool LLTextureCache::writeToFastCache(S32 id, LLPointer<LLImageRaw> raw, S32 dis
 		if(w * h *c > 0) //valid
 		{
 			//make a duplicate to keep the original raw image untouched.
-			raw = raw->duplicate();
+			raw = raw->scaled(w, h);
 			if (raw->isBufferInvalid())
 			{
 				LL_WARNS() << "Invalid image duplicate buffer" << LL_ENDL;
 				return false;
 			}
 
-			raw->scale(w, h) ;
-			
 			discardlevel += i ;
 		}
 	}
diff --git a/indra/newview/llviewertexture.cpp b/indra/newview/llviewertexture.cpp
index 5de7df7b91..e5a1bed48c 100644
--- a/indra/newview/llviewertexture.cpp
+++ b/indra/newview/llviewertexture.cpp
@@ -1396,8 +1396,7 @@ void LLViewerFetchedTexture::addToCreateTexture()
 
 						{
 							//make a duplicate in case somebody else is using this raw image
-							mRawImage = mRawImage->duplicate(); 
-							mRawImage->scale(w >> i, h >> i) ;					
+							mRawImage = mRawImage->scaled(w >> i, h >> i);
 						}
 					}
 				}
@@ -2913,8 +2912,7 @@ void LLViewerFetchedTexture::setCachedRawImage()
 			
 			{
 				//make a duplicate in case somebody else is using this raw image
-				mRawImage = mRawImage->duplicate(); 
-				mRawImage->scale(w >> i, h >> i) ;
+				mRawImage = mRawImage->scaled(w >> i, h >> i);
 			}
 		}
 		mCachedRawImage = mRawImage;