avoid transferring the textures for each frame

Change-Id: I79466e66dc18dbbf72f192fe44d05fb6d657fa34

chart2/source/view/charttypes/GL3DBarChart.cxx

@@ -35,7 +35,8 @@ GL3DBarChart::GL3DBarChart(
     mnStep(0),
     mnStepsTotal(0),
     mnCornerId(0),
-    mbBlockUserInput(false)
+    mbBlockUserInput(false),
+    mbNeedsNewRender(true)
 {
     Size aSize = mrWindow.GetSizePixel();
     mpRenderer->SetSize(aSize);
@@ -93,6 +94,7 @@ double findMaxValue(const boost::ptr_vector<VDataSeries>& rDataSeriesContainer)
 void GL3DBarChart::create3DShapes(const boost::ptr_vector<VDataSeries>& rDataSeriesContainer,
         ExplicitCategoriesProvider& rCatProvider)
 {
+    mpRenderer->ReleaseShapes();
     // Each series of data flows from left to right, and multiple series are
     // stacked vertically along y axis.
 
@@ -269,6 +271,8 @@ void GL3DBarChart::create3DShapes(const boost::ptr_vector<VDataSeries>& rDataSer
     mpCamera->setPosition(maCameraPosition);
     maCameraDirection = glm::vec3(mnMaxX/2, mnMaxY/2, 0);
     mpCamera->setDirection(maCameraDirection);
+
+    mbNeedsNewRender = true;
 }
 
 void GL3DBarChart::render()
@@ -280,11 +284,19 @@ void GL3DBarChart::render()
     Size aSize = mrWindow.GetSizePixel();
     mpRenderer->SetSize(aSize);
     mrWindow.getContext()->setWinSize(aSize);
-    for(boost::ptr_vector<opengl3D::Renderable3DObject>::iterator itr = maShapes.begin(),
-            itrEnd = maShapes.end(); itr != itrEnd; ++itr)
+    if(mbNeedsNewRender)
     {
-        itr->render();
+        for(boost::ptr_vector<opengl3D::Renderable3DObject>::iterator itr = maShapes.begin(),
+                itrEnd = maShapes.end(); itr != itrEnd; ++itr)
+        {
+            itr->render();
+        }
     }
+    else
+    {
+        mpCamera->render();
+    }
+    mbNeedsNewRender = false;
     mpRenderer->ProcessUnrenderedShape();
     mrWindow.getContext()->swapBuffers();
 }

chart2/source/view/inc/GL3DBarChart.hxx

@@ -105,6 +105,7 @@ private:
 
     std::map<sal_uInt32, const BarInformation> maBarMap;
     bool mbBlockUserInput;
+    bool mbNeedsNewRender;
 };
 
 }

chart2/source/view/inc/GL3DRenderer.hxx

@@ -184,6 +184,9 @@ public:
     void SetPickingMode(bool bPickingMode);
 
     sal_uInt32 GetPixelColorFromPoint(long nX, long nY);
+
+    void ReleaseShapes();
+    void ReleaseScreenTextShapes();
 private:
     void MoveModelf(PosVecf3& trans,PosVecf3& angle,PosVecf3& scale);
 
@@ -219,11 +222,9 @@ private:
                                int iSubDivZ, float width, float height, float depth);
     void CreateSceneBoxView();
 
-    void ReleaseShapes();
     void ReleasePolygonShapes();
     void ReleaseExtrude3DShapes();
     void ReleaseTextShapes();
-    void ReleaseScreenTextShapes();
     void ReleaseBatchBarInfo();
     void GetBatchBarsInfo();
     void GetBatchTopAndFlatInfo(Extrude3DInfo &extrude3D);

chart2/source/view/main/GL3DRenderer.cxx

@@ -1711,7 +1711,6 @@ void OpenGL3DRenderer::ProcessUnrenderedShape()
     RenderTextShape();
     // render screen text
     RenderScreenTextShape();
-    ReleaseShapes();
 #if DEBUG_FBO
     OUString aFileName = OUString("D://shaderout_") + OUString::number(m_iWidth) + "_" + OUString::number(m_iHeight) + ".png";
     OpenGLHelper::renderToFile(m_iWidth, m_iHeight, aFileName);
@@ -1762,7 +1761,6 @@ void OpenGL3DRenderer::ReleaseBatchBarInfo()
     }
 }
 
-
 void OpenGL3DRenderer::ReleaseShapes()
 {
     ReleasePolygonShapes();