Merge branch 'master' into DRTVWR-543-maint

# Conflicts:
#	autobuild.xml
#	indra/cmake/LLCommon.cmake
#	indra/llcommon/CMakeLists.txt
#	indra/llrender/llgl.cpp
#	indra/newview/llappviewer.cpp
#	indra/newview/llface.cpp
#	indra/newview/llflexibleobject.cpp
#	indra/newview/llvovolume.cpp

1 files changed, 142 insertions, 0 deletions

diff --git a/indra/llmeshoptimizer/llmeshoptimizer.cpp b/indra/llmeshoptimizer/llmeshoptimizer.cpp
new file mode 100644
index 0000000000..a879389c5a
--- /dev/null
+++ b/indra/llmeshoptimizer/llmeshoptimizer.cpp
@@ -0,0 +1,142 @@
+ /** 
+* @file llmeshoptimizer.cpp
+* @brief Wrapper around meshoptimizer
+*
+* $LicenseInfo:firstyear=2021&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2021, Linden Research, Inc.
+* 
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+* 
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+* 
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+* 
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "llmeshoptimizer.h"
+
+#include "meshoptimizer.h"
+
+LLMeshOptimizer::LLMeshOptimizer()
+{
+    // Todo: Looks like for memory management, we can add allocator and deallocator callbacks
+    // Should be one time
+    // meshopt_setAllocator(allocate, deallocate);
+}
+
+LLMeshOptimizer::~LLMeshOptimizer()
+{
+}
+
+//static
+void LLMeshOptimizer::generateShadowIndexBuffer(U16 *destination,
+    const U16 *indices,
+    U64 index_count,
+    const LLVector4a *vertex_positions,
+    U64 vertex_count,
+    U64 vertex_positions_stride
+)
+{
+    meshopt_generateShadowIndexBuffer<unsigned short>(destination,
+        indices,
+        index_count,
+        (const float*)vertex_positions, // verify that it is correct to convert to float
+        vertex_count,
+        sizeof(LLVector4a),
+        vertex_positions_stride
+        );
+}
+
+//static
+U64 LLMeshOptimizer::simplifyU32(U32 *destination,
+    const U32 *indices,
+    U64 index_count,
+    const LLVector4a *vertex_positions,
+    U64 vertex_count,
+    U64 vertex_positions_stride,
+    U64 target_index_count,
+    F32 target_error,
+    bool sloppy,
+    F32* result_error
+)
+{
+    if (sloppy)
+    {
+        return meshopt_simplifySloppy<unsigned int>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+    else
+    {
+        return meshopt_simplify<unsigned int>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+}
+
+//static
+U64 LLMeshOptimizer::simplify(U16 *destination,
+                              const U16 *indices,
+                              U64 index_count,
+                              const LLVector4a *vertex_positions,
+                              U64 vertex_count,
+                              U64 vertex_positions_stride,
+                              U64 target_index_count,
+                              F32 target_error,
+                              bool sloppy,
+                              F32* result_error
+    )
+{
+    if (sloppy)
+    {
+        return meshopt_simplifySloppy<unsigned short>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+    else
+    {
+        return meshopt_simplify<unsigned short>(destination,
+            indices,
+            index_count,
+            (const float*)vertex_positions,
+            vertex_count,
+            vertex_positions_stride,
+            target_index_count,
+            target_error,
+            result_error
+            );
+    }
+}
+