first part for threaded chart rendering, fdo#81110

It is nor working correctly yet.

Change-Id: Ic592eb2f50265886ad6d97539d2c52d7c45179e6

2 files changed, 174 insertions, 113 deletions

diff --git a/chart2/source/view/charttypes/GL3DBarChart.cxx b/chart2/source/view/charttypes/GL3DBarChart.cxx
index f80ea9976527..8ce235fb9dae 100644
--- a/chart2/source/view/charttypes/GL3DBarChart.cxx
+++ b/chart2/source/view/charttypes/GL3DBarChart.cxx
@@ -23,6 +23,108 @@ using namespace com::sun::star;
 
 namespace chart {
 
+const size_t STEPS = 200;
+
+class RenderThread : public salhelper::Thread
+{
+public:
+    RenderThread(GL3DBarChart* pChart);
+
+protected:
+
+    void renderFrame();
+    GL3DBarChart* mpChart;
+};
+
+RenderThread::RenderThread(GL3DBarChart* pChart):
+    salhelper::Thread("RenderThread"),
+    mpChart(pChart)
+{
+}
+
+void RenderThread::renderFrame()
+{
+    if(!mpChart->mbValidContext)
+        return;
+
+    mpChart->mrWindow.getContext().makeCurrent();
+    Size aSize = mpChart->mrWindow.GetSizePixel();
+    mpChart->mpRenderer->SetSize(aSize);
+    if(mpChart->mbNeedsNewRender)
+    {
+        for(boost::ptr_vector<opengl3D::Renderable3DObject>::iterator itr = mpChart->maShapes.begin(),
+                itrEnd = mpChart->maShapes.end(); itr != itrEnd; ++itr)
+        {
+            itr->render();
+        }
+    }
+    else
+    {
+        mpChart->mpCamera->render();
+    }
+    mpChart->mpRenderer->ProcessUnrenderedShape(mpChart->mbNeedsNewRender);
+    mpChart->mbNeedsNewRender = false;
+    mpChart->mrWindow.getContext().swapBuffers();
+
+}
+
+class RenderOneFrameThread : public RenderThread
+{
+public:
+    RenderOneFrameThread(GL3DBarChart* pChart):
+        RenderThread(pChart)
+    {}
+
+protected:
+
+    virtual void execute() SAL_OVERRIDE;
+};
+
+void RenderOneFrameThread::execute()
+{
+    osl::MutexGuard aGuard(mpChart->maMutex);
+    renderFrame();
+}
+
+class RenderAnimationThread : public RenderThread
+{
+public:
+    RenderAnimationThread(GL3DBarChart* pChart, const glm::vec3& rStartPos, const glm::vec3& rEndPos,
+            const sal_Int32 nSteps = STEPS):
+        RenderThread(pChart),
+        maStartPos(rStartPos),
+        maEndPos(rEndPos),
+        mnSteps(nSteps)
+    {
+    }
+
+protected:
+
+    virtual void execute() SAL_OVERRIDE;
+
+private:
+    glm::vec3 maStartPos;
+    glm::vec3 maEndPos;
+    sal_Int32 mnSteps;
+
+};
+
+void RenderAnimationThread::execute()
+{
+    osl::MutexGuard aGuard(mpChart->maMutex);
+    glm::vec3 aStep = (maEndPos - maStartPos)/(float)mnSteps;
+    for(sal_Int32 i = 0; i < mnSteps; ++i)
+    {
+        mpChart->maCameraPosition += aStep;
+        mpChart->mpCamera->setPosition(mpChart->maCameraPosition);
+        /*
+        mpChart->maCameraDirection += mpChart->maStepDirection;
+        mpChart->mpCamera->setDirection(mpChart->maCameraDirection);
+        */
+        renderFrame();
+    }
+}
+
 GL3DBarChart::GL3DBarChart(
     const css::uno::Reference<css::chart2::XChartType>& xChartType,
     OpenGLWindow& rWindow) :
@@ -32,8 +134,6 @@ GL3DBarChart::GL3DBarChart(
     mpCamera(NULL),
     mbValidContext(true),
     mpTextCache(new opengl3D::TextCache()),
-    mnStep(0),
-    mnStepsTotal(0),
     mnMaxX(0),
     mnMaxY(0),
     mnDistance(0.0),
@@ -59,6 +159,9 @@ GL3DBarChart::BarInformation::BarInformation(const glm::vec3& rPos, float nVal,
 
 GL3DBarChart::~GL3DBarChart()
 {
+    if(mpRenderThread.is())
+        mpRenderThread->join();
+    osl::MutexGuard aGuard(maMutex);
     if(mbValidContext)
         mrWindow.setRenderer(NULL);
 }
@@ -67,7 +170,6 @@ namespace {
 
 const float TEXT_HEIGHT = 10.0f;
 float DEFAULT_CAMERA_HEIGHT = 500.0f;
-const size_t STEPS = 200;
 const sal_uLong TIMEOUT = 5;
 const sal_uInt32 ID_STEP = 10;
 
@@ -108,6 +210,7 @@ double findMaxValue(const boost::ptr_vector<VDataSeries>& rDataSeriesContainer)
 void GL3DBarChart::create3DShapes(const boost::ptr_vector<VDataSeries>& rDataSeriesContainer,
         ExplicitCategoriesProvider& rCatProvider)
 {
+    osl::MutexGuard aGuard(maMutex);
     mpRenderer->ReleaseShapes();
     // Each series of data flows from left to right, and multiple series are
     // stacked vertically along y axis.
@@ -297,35 +400,14 @@ void GL3DBarChart::create3DShapes(const boost::ptr_vector<VDataSeries>& rDataSer
     mbNeedsNewRender = true;
 }
 
-void GL3DBarChart::render()
+void GL3DBarChart::update()
 {
-    if(!mbValidContext)
-        return;
-
-    mrWindow.getContext().makeCurrent();
+    if(mpRenderThread.is())
+        mpRenderThread->join();
     Size aSize = mrWindow.GetSizePixel();
-    mpRenderer->SetSize(aSize);
     mrWindow.getContext().setWinSize(aSize);
-    if(mbNeedsNewRender)
-    {
-        for(boost::ptr_vector<opengl3D::Renderable3DObject>::iterator itr = maShapes.begin(),
-                itrEnd = maShapes.end(); itr != itrEnd; ++itr)
-        {
-            itr->render();
-        }
-    }
-    else
-    {
-        mpCamera->render();
-    }
-    mpRenderer->ProcessUnrenderedShape(mbNeedsNewRender);
-    mbNeedsNewRender = false;
-    mrWindow.getContext().swapBuffers();
-}
-
-void GL3DBarChart::update()
-{
-    render();
+    mpRenderThread = rtl::Reference<RenderThread>(new RenderOneFrameThread(this));
+    mpRenderThread->launch();
 }
 
 namespace {
@@ -352,26 +434,31 @@ public:
 
 void GL3DBarChart::moveToDefault()
 {
-    mnStepsTotal = STEPS;
-    mnStep = 0;
-    mbBlockUserInput = true;
-    glm::vec3 maTargetPosition = maDefaultCameraPosition;
-    maStep = (maTargetPosition - maCameraPosition)/((float)mnStepsTotal);
+    osl::MutexGuard aGuard(maMutex);
+    if(mpRenderThread.is())
+        mpRenderThread->join();
 
+    Size aSize = mrWindow.GetSizePixel();
+    mrWindow.getContext().setWinSize(aSize);
+    mpRenderThread = rtl::Reference<RenderThread>(new RenderAnimationThread(this, maCameraPosition, maDefaultCameraPosition, STEPS));
+    mpRenderThread->launch();
+
+    /*
+     * TODO: moggi: add to thread
     glm::vec3 maTargetDirection = maDefaultCameraDirection;
     maStepDirection = (maTargetDirection - maCameraDirection)/((float)mnStepsTotal);
-    maTimer.SetTimeout(TIMEOUT);
-    maTimer.SetTimeoutHdl(LINK(this, GL3DBarChart, MoveToBar));
-    maTimer.Start();
+    */
 }
 
 void GL3DBarChart::clickedAt(const Point& rPos, sal_uInt16 nButtons)
 {
     if(mbBlockUserInput)
         return;
+
     if (nButtons == MOUSE_RIGHT)
     {
         moveToDefault();
+        return;
     }
 
     if(nButtons != MOUSE_LEFT)
@@ -380,10 +467,12 @@ void GL3DBarChart::clickedAt(const Point& rPos, sal_uInt16 nButtons)
     sal_uInt32 nId = 5;
     {
         PickingModeSetter aPickingModeSetter(mpRenderer.get());
-        render();
+        update();
+        mpRenderThread->join();
         nId = mpRenderer->GetPixelColorFromPoint(rPos.X(), rPos.Y());
     }
 
+    osl::MutexGuard aGuard(maMutex);
     std::map<sal_uInt32, const BarInformation>::const_iterator itr =
         maBarMap.find(nId);
 
@@ -393,30 +482,39 @@ void GL3DBarChart::clickedAt(const Point& rPos, sal_uInt16 nButtons)
     mbBlockUserInput = true;
 
     const BarInformation& rBarInfo = itr->second;
-    mnStepsTotal = STEPS;
-    mnStep = 0;
-    render();
+
+    if(mpRenderThread.is())
+        mpRenderThread->join();
+
+    maShapes.push_back(new opengl3D::ScreenText(mpRenderer.get(), *mpTextCache,
+                OUString("Value: ") + OUString::number(rBarInfo.mnVal), 0));
+    opengl3D::ScreenText* pScreenText = static_cast<opengl3D::ScreenText*>(&maShapes.back());
+    pScreenText->setPosition(glm::vec2(-0.9f, 0.9f), glm::vec2(-0.6f, 0.8f));
+    pScreenText->render();
 
     glm::vec3 maTargetPosition = rBarInfo.maPos;
     maTargetPosition.z += 240;
     maTargetPosition.y += BAR_SIZE_Y / 2.0f;
-    maStep = (maTargetPosition - maCameraPosition)/((float)mnStepsTotal);
+    Size aSize = mrWindow.GetSizePixel();
+    mrWindow.getContext().setWinSize(aSize);
+    mpRenderThread = rtl::Reference<RenderThread>(new RenderAnimationThread(this, maCameraPosition, maTargetPosition, STEPS));
+    mpRenderThread->launch();
 
+    /*
+     * TODO: moggi: add to thread
     glm::vec3 maTargetDirection = rBarInfo.maPos;
     maTargetDirection.x += BAR_SIZE_X / 2.0f;
     maTargetDirection.y += BAR_SIZE_Y / 2.0f;
 
     maStepDirection = (maTargetDirection - maCameraDirection)/((float)mnStepsTotal);
+    */
 
-    maTimer.SetTimeout(TIMEOUT);
-    maTimer.SetTimeoutHdl(LINK(this, GL3DBarChart, MoveToBar));
-    maTimer.Start();
+}
 
-    maShapes.push_back(new opengl3D::ScreenText(mpRenderer.get(), *mpTextCache,
-                OUString("Value: ") + OUString::number(rBarInfo.mnVal), 0));
-    opengl3D::ScreenText* pScreenText = static_cast<opengl3D::ScreenText*>(&maShapes.back());
-    pScreenText->setPosition(glm::vec2(-0.9f, 0.9f), glm::vec2(-0.6f, 0.8f));
-    pScreenText->render();
+void GL3DBarChart::render()
+{
+    osl::MutexGuard aGuard(maMutex);
+    update();
 }
 
 void GL3DBarChart::mouseDragMove(const Point& rStartPos, const Point& rEndPos, sal_uInt16 )
@@ -473,76 +571,33 @@ glm::vec3 GL3DBarChart::getCornerPosition(sal_Int8 nId)
 
 void GL3DBarChart::moveToCorner()
 {
-    mnStepsTotal = STEPS;
-    maStep = (getCornerPosition(mnCornerId) - maCameraPosition) / float(mnStepsTotal);
-
-    maStepDirection = (glm::vec3(mnMaxX/2.0f, mnMaxY/2.0f, 0) - maCameraDirection)/ float(mnStepsTotal);
-    maTimer.SetTimeout(TIMEOUT);
-    maTimer.SetTimeoutHdl(LINK(this, GL3DBarChart, MoveCamera));
-    maTimer.Start();
-}
-
-IMPL_LINK_NOARG(GL3DBarChart, MoveCamera)
-{
-    maTimer.Stop();
-    if(mnStep < mnStepsTotal)
-    {
-        ++mnStep;
-        maCameraPosition += maStep;
-        mpCamera->setPosition(maCameraPosition);
-        maCameraDirection += maStepDirection;
-        mpCamera->setDirection(maCameraDirection);
-        render();
-        maTimer.SetTimeout(TIMEOUT);
-        maTimer.Start();
-    }
-    else
-    {
-        mbBlockUserInput = false;
-        mnStep = 0;
-    }
+    osl::MutexGuard aGuard(maMutex);
+    if(mpRenderThread.is())
+        mpRenderThread->join();
 
-    return 0;
-}
-
-IMPL_LINK_NOARG(GL3DBarChart, MoveToBar)
-{
-    maTimer.Stop();
-    if(mnStep < mnStepsTotal)
-    {
-        ++mnStep;
-        maCameraPosition += maStep;
-        mpCamera->setPosition(maCameraPosition);
-        maCameraDirection += maStepDirection;
-        mpCamera->setDirection(maCameraDirection);
-        render();
-        maTimer.SetTimeout(TIMEOUT);
-        maTimer.Start();
-    }
-    else
-    {
-        maShapes.pop_back();
-        mpRenderer->ReleaseScreenTextShapes();
-        mbBlockUserInput = false;
-        mnStep = 0;
-    }
+    Size aSize = mrWindow.GetSizePixel();
+    mrWindow.getContext().setWinSize(aSize);
+    mpRenderThread = rtl::Reference<RenderThread>(new RenderAnimationThread(this, getCornerPosition(mnCornerId),
+                maCameraPosition, STEPS));
+    mpRenderThread->launch();
 
-    return 0;
+    // TODO: moggi: add to thread
+    // maStepDirection = (glm::vec3(mnMaxX/2.0f, mnMaxY/2.0f, 0) - maCameraDirection)/ float(mnStepsTotal);
 }
 
 void GL3DBarChart::scroll(long nDelta)
 {
-    if(mbBlockUserInput)
-        return;
+    osl::MutexGuard aGuard(maMutex);
 
     glm::vec3 maDir = glm::normalize(maCameraPosition - maCameraDirection);
     maCameraPosition -= (float((nDelta/10)) * maDir);
     mpCamera->setPosition(maCameraPosition);
-    render();
+    update();
 }
 
 void GL3DBarChart::contextDestroyed()
 {
+    osl::MutexGuard aGuard(maMutex);
     mbValidContext = false;
 }
 
diff --git a/chart2/source/view/inc/GL3DBarChart.hxx b/chart2/source/view/inc/GL3DBarChart.hxx
index b14de4622bb7..25176277f068 100644
--- a/chart2/source/view/inc/GL3DBarChart.hxx
+++ b/chart2/source/view/inc/GL3DBarChart.hxx
@@ -21,6 +21,9 @@
 #include <vcl/timer.hxx>
 #include <vcl/openglwin.hxx>
 
+#include <rtl/ref.hxx>
+#include <salhelper/thread.hxx>
+
 namespace chart {
 
 class ExplicitCategoriesProvider;
@@ -34,8 +37,15 @@ class Camera;
 
 }
 
+class RenderThread;
+class RenderOneFrameThread;
+class RenderAnimationThread;
+
 class GL3DBarChart : public GL3DPlotterBase, public IRenderer
 {
+    friend class RenderThread;
+    friend class RenderOneFrameThread;
+    friend class RenderAnimationThread;
 public:
     GL3DBarChart(
         const css::uno::Reference<css::chart2::XChartType>& xChartType,
@@ -61,9 +71,6 @@ private:
     void moveToDefault();
     glm::vec3 getCornerPosition(sal_Int8 nCornerId);
 
-    DECL_LINK(MoveCamera, void*);
-    DECL_LINK(MoveToBar, void*);
-
     css::uno::Reference<css::chart2::XChartType> mxChartType;
     boost::ptr_vector<opengl3D::Renderable3DObject> maShapes;
 
@@ -81,11 +88,7 @@ private:
     glm::vec3 maDefaultCameraPosition;
     glm::vec3 maDefaultCameraDirection;
 
-    Timer maTimer;
-    glm::vec3 maStep;
     glm::vec3 maStepDirection;
-    size_t mnStep;
-    size_t mnStepsTotal;
     float mnMaxX;
     float mnMaxY;
     float mnDistance;
@@ -112,6 +115,9 @@ private:
     bool mbBlockUserInput;
     bool mbNeedsNewRender;
     bool mbCameraInit;
+
+    osl::Mutex maMutex;
+    rtl::Reference<RenderThread> mpRenderThread;
 };
 
 }