Innitial commit of experimental v2 texture system port work. Compiles and runs on windows, at least. Fixing bugs as they come.

Need to test:
localassetbrowser
preview related floaters
hgfloatertexteditor
maps
media textures! Currently very hacky
web browser
alpha masks on avatars
bumpmaps
Are all sky components appearing?
LLViewerDynamicTexture (texture baking, browser, animated textures, anim previews, etc)
Snapshot related features
Customize avatar
vfs floater
UI textures in general
Texture priority issues

indra/newview/llpreviewtexture.h

@@ -36,7 +36,7 @@
 #include "llpreview.h"
 #include "llbutton.h"
 #include "llframetimer.h"
-#include "llviewerimage.h"
+#include "llviewertexture.h"
 
 class LLComboBox;
 class LLImageRaw;
@@ -73,7 +73,7 @@ public:
 	static void			saveToFile(void* userdata);
 	static void			onFileLoadedForSave( 
 							BOOL success,
-							LLViewerImage *src_vi,
+							LLViewerFetchedTexture *src_vi,
 							LLImageRaw* src, 
 							LLImageRaw* aux_src,
 							S32 discard_level, 
@@ -90,12 +90,14 @@ protected:
 	virtual const char *getTitleName() const { return "Texture"; }
 	
 private:
+	void				updateImageID(); // set what image is being uploaded.
 	void				updateDimensions();
-	LLUUID						mImageID;
-	LLPointer<LLViewerImage>		mImage;
-	BOOL				mLoadingFullImage;
+	LLUUID				mImageID;
+	LLPointer<LLViewerFetchedTexture>		mImage;
+	S32                 mImageOldBoostLevel;
 	std::string			mSaveFileName;
 	LLFrameTimer		mSavedFileTimer;
+	BOOL				mLoadingFullImage;
 	BOOL                mShowKeepDiscard;
 	BOOL                mCopyToInv;
 	
@@ -106,12 +108,12 @@ private:
 	// This is stored off in a member variable, because the save-as
 	// button and drag and drop functionality need to know.
 	BOOL mIsCopyable;
-	
+	BOOL mUpdateDimensions;
 	S32 mLastHeight;
 	S32 mLastWidth;
 	F32 mAspectRatio;	// 0 = Unconstrained
 	S32 mAlphaMaskResult;
+
+	LLLoadedCallbackEntry::source_callback_list_t mCallbackTextureList ; 
 };
-
-
 #endif  // LL_LLPREVIEWTEXTURE_H