MAINT-4773 FIXED Some transparent textures are rendered as white.

This bug fix related also to MAINT-4092. In 4092 sometimes when we
don't have information about the texture during the setup the materail
(LLVOVolume::setTEMaterialParams()), we should substitute the material with
disabled "diffuse alpha mode" (for detail in cases see MAINT-4092 JIRA ticket
comment).
This bug fix cover the case when after the loading texture we have all
information about alpha mode, and in this case we should restore diffuse
alpha mode if need.

In short: now we always believe that information about the material is valid
(LLVOVolume::setTEMaterialParams()).
Of course before setup it we check information about texture (if it possible)
, if texture is not exist in database or not 32 bit depth (for diffuse) we
made changes.
But in all other cases (if we can't receive information about texture)
we remeber this case in mWaitingTextureInfo multimap.
When information about texture will be available we get it in:
LLVOVolume::notify AboutCreatingTexture()
or
Volume::notifyAboutMissingAsset()
and again, we recheck it and if need change (substitute)
the material parameters.
I suppose that this solution is better than was before.

If this patch will be accepted
, I think that MAINT-4092 should be rechecked again.

1 files changed, 5 insertions, 2 deletions

diff --git a/indra/newview/llface.h b/indra/newview/llface.h
index d3a561facc..ee545acb94 100755
--- a/indra/newview/llface.h
+++ b/indra/newview/llface.h
@@ -218,7 +218,7 @@ public:
 	void        setHasMedia(bool has_media)  { mHasMedia = has_media ;}
 	BOOL        hasMedia() const ;
 
-	BOOL                  switchTexture() ;
+	BOOL		switchTexture() ;
 
 	//vertex buffer tracking
 	void setVertexBuffer(LLVertexBuffer* buffer);
@@ -230,10 +230,13 @@ public:
 
 	static U32 getRiggedDataMask(U32 type);
 
+	void	notifyAboutCreatingTexture(LLViewerTexture *texture);
+	void	notifyAboutMissingAsset(LLViewerTexture *texture);
+
 public: //aligned members
 	LLVector4a		mExtents[2];
 
-private:	
+private:
 	F32         adjustPartialOverlapPixelArea(F32 cos_angle_to_view_dir, F32 radius );
 	BOOL        calcPixelArea(F32& cos_angle_to_view_dir, F32& radius) ;
 public: