fixes VWR-4214 Glow effect passes through alpha textures where alpha is actually "solid"

and its many many dupes.

In summary this does the following:
* When laying down alpha, uses the new separated color-and-alpha blend func support to suppress existing glow in proportion to the opacity of the incoming fragments
* Moves glowing-alpha support from the glow pool to the alpha pool, ensures that the glow pass for a vertex buffer happens after the alpha pass for the vertex buffer so that it doesn't suppress its *own* glow.

Tested with all shader modes, FBO on/off, and deferred rendering.  Tested with every permutation of alpha/non-alpha/glow/non-glow/fullbright/waterglow/particle interaction I could contrive so far. :)

1 files changed, 5 insertions, 11 deletions

diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 1d3d943b06..91aa994eab 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -3317,11 +3317,10 @@ void LLVolumeGeometryManager::registerFace(LLSpatialGroup* group, LLFace* facep,
 
 	S32 idx = draw_vec.size()-1;
 
-
 	BOOL fullbright = (type == LLRenderPass::PASS_FULLBRIGHT) ||
-					  (type == LLRenderPass::PASS_INVISIBLE) ||
-					  (type == LLRenderPass::PASS_ALPHA ? facep->isState(LLFace::FULLBRIGHT) : FALSE);
-
+		(type == LLRenderPass::PASS_INVISIBLE) ||
+		(type == LLRenderPass::PASS_ALPHA ? facep->isState(LLFace::FULLBRIGHT) : FALSE);
+	
 	if (!fullbright && type != LLRenderPass::PASS_GLOW && !facep->mVertexBuffer->hasDataType(LLVertexBuffer::TYPE_NORMAL))
 	{
 		llwarns << "Non fullbright face has no normals!" << llendl;
@@ -3350,12 +3349,7 @@ void LLVolumeGeometryManager::registerFace(LLSpatialGroup* group, LLFace* facep,
 	
 	LLViewerTexture* tex = facep->getTexture();
 
-	U8 glow = 0;
-		
-	if (type == LLRenderPass::PASS_GLOW)
-	{
-		glow = (U8) (facep->getTextureEntry()->getGlow() * 255);
-	}
+	U8 glow = (U8) (facep->getTextureEntry()->getGlow() * 255);
 
 	if (facep->mVertexBuffer.isNull())
 	{
@@ -4001,7 +3995,7 @@ void LLVolumeGeometryManager::genDrawInfo(LLSpatialGroup* group, U32 mask, std::
 				}
 			}
 
-			if (LLPipeline::sRenderGlow && te->getGlow() > 0.f)
+			if (!is_alpha && LLPipeline::sRenderGlow && te->getGlow() > 0.f)
 			{
 				registerFace(group, facep, LLRenderPass::PASS_GLOW);
 			}