Refactor 3D renderer to use multithreading

This try uses full 3D renderers working on the same ZBuffer
target, but are capable to render one stripe per thread.
This is rougher in granularity and uses multiple cores better
than the first try (see gerrit 24393) which was too fine-granular
being based on scanline render parallelization.
SecUred some more classes based on SdrPrimitive3D for multi-
theaded usage (places where local buffered stuff is done)

Change-Id: I4ddd5885ad41dd6432d0695e528818a86e427bfd
Reviewed-on: https://gerrit.libreoffice.org/24538
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Reviewed-by: Armin Le Grand <Armin.Le.Grand@cib.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drawinglayer/source/primitive3d/sdrextrudeprimitive3d.cxx b/drawinglayer/source/primitive3d/sdrextrudeprimitive3d.cxx
index a5fe0ddb0348..be15838fd8b7 100644
--- a/drawinglayer/source/primitive3d/sdrextrudeprimitive3d.cxx
+++ b/drawinglayer/source/primitive3d/sdrextrudeprimitive3d.cxx
@@ -375,6 +375,8 @@ namespace drawinglayer
             // again when no longer geometry is needed for non-visible 3D objects as it is now for chart
             if(getPolyPolygon().count() && !maSlices.size())
             {
+                ::osl::MutexGuard aGuard( m_aMutex );
+
                 const_cast< SdrExtrudePrimitive3D& >(*this).impCreateSlices();
             }
 
@@ -488,6 +490,8 @@ namespace drawinglayer
                     (!getBuffered3DDecomposition().empty()
                         && *mpLastRLGViewInformation != rViewInformation))
                 {
+                    ::osl::MutexGuard aGuard( m_aMutex );
+
                     // conditions of last local decomposition with reduced lines have changed. Remember
                     // new one and clear current decompositiopn
                     SdrExtrudePrimitive3D* pThat = const_cast< SdrExtrudePrimitive3D* >(this);