From d650e286d2858aa5f4f783f4048cde162044e59f Mon Sep 17 00:00:00 2001
From: Rye Mutt <rye@alchemyviewer.org>
Date: Sun, 5 Jul 2020 12:58:14 -0400
Subject: [PATCH] Small VBO opt for faster discarding of buffers
---
indra/llrender/llvertexbuffer.cpp | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 9fc7ed023b9..08e0a29de36 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -204,7 +204,7 @@ volatile U8* LLVBOPool::allocate(U32& name, U32 size, bool for_seed)
}
else
{ //always use a true hint of static draw when allocating non-client-backed buffers
- glBufferDataARB(mType, size, 0, GL_STATIC_DRAW_ARB);
+ glBufferDataARB(mType, size, nullptr, GL_STATIC_DRAW_ARB);
}
glBindBufferARB(mType, 0);
@@ -1960,6 +1960,7 @@ void LLVertexBuffer::unmapBuffer()
else
{
stop_glerror();
+ glBufferDataARB(GL_ARRAY_BUFFER_ARB, getSize(), nullptr, mUsage); // <alchemy/>
glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, getSize(), (U8*) mMappedData);
stop_glerror();
}
@@ -2042,6 +2043,7 @@ void LLVertexBuffer::unmapBuffer()
else
{
stop_glerror();
+ glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, getIndicesSize(), nullptr, mUsage); // <alchemy/>
glBufferSubDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0, getIndicesSize(), (U8*) mMappedIndexData);
stop_glerror();
}
--
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