DD-92 : pull merge lindenlab/sunshine-external to get AISv3 work

1 files changed, 10 insertions, 9 deletions

diff --git a/indra/llappearance/lltexlayer.cpp b/indra/llappearance/lltexlayer.cpp
index f6abaa5eb3..2cf86bb4fe 100644
--- a/indra/llappearance/lltexlayer.cpp
+++ b/indra/llappearance/lltexlayer.cpp
@@ -1560,10 +1560,13 @@ void LLTexLayer::renderMorphMasks(S32 x, S32 y, S32 width, S32 height, const LLC
 		}
 
 		U32 cache_index = alpha_mask_crc.getCRC();
-		U8* alpha_data = get_if_there(mAlphaCache,cache_index,(U8*)NULL);
-		if (!alpha_data)
+		U8* alpha_data = NULL; 
+                // We believe we need to generate morph masks, do not assume that the cached version is accurate.
+                // We can get bad morph masks during login, on minimize, and occasional gl errors.
+                // We should only be doing this when we believe something has changed with respect to the user's appearance.
 		{
-			// clear out a slot if we have filled our cache
+                       LL_DEBUGS("Avatar") << "gl alpha cache of morph mask not found, doing readback: " << getName() << LL_ENDL;
+                        // clear out a slot if we have filled our cache
 			S32 max_cache_entries = getTexLayerSet()->getAvatarAppearance()->isSelf() ? 4 : 1;
 			while ((S32)mAlphaCache.size() >= max_cache_entries)
 			{
@@ -1783,13 +1786,11 @@ LLTexLayer* LLTexLayerTemplate::getLayer(U32 i) const
 /*virtual*/ void LLTexLayerTemplate::gatherAlphaMasks(U8 *data, S32 originX, S32 originY, S32 width, S32 height)
 {
 	U32 num_wearables = updateWearableCache();
-	for (U32 i = 0; i < num_wearables; i++)
+	U32 i = num_wearables - 1; // For rendering morph masks, we only want to use the top wearable
+	LLTexLayer *layer = getLayer(i);
+	if (layer)
 	{
-		LLTexLayer *layer = getLayer(i);
-		if (layer)
-		{
-			layer->addAlphaMask(data, originX, originY, width, height);
-		}
+		layer->addAlphaMask(data, originX, originY, width, height);
 	}
 }