piesegment2d gl rendering && mov coords operation to dummy shape

Change-Id: Ic709fe37554cf29b4a644cabdc618c15959593d7

4 files changed, 278 insertions, 1 deletions

diff --git a/chart2/source/view/inc/DummyXShape.hxx b/chart2/source/view/inc/DummyXShape.hxx
index 7112ac7fc1ae..9b3eed2a5fe5 100644
--- a/chart2/source/view/inc/DummyXShape.hxx
+++ b/chart2/source/view/inc/DummyXShape.hxx
@@ -239,7 +239,7 @@ public:
     DummyPieSegment2D(double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree,
             double fUnitCircleInnerRadius, double fUnitCircleOuterRadius,
             const drawing::Direction3D& rOffset, const drawing::HomogenMatrix& rUnitCircleToScene);
-
+    void render();
 private:
     double mfUnitCircleStartAngleDegree;
     double mfUnitCircleWidthAngleDegree;
diff --git a/chart2/source/view/main/DummyXShape.cxx b/chart2/source/view/main/DummyXShape.cxx
index 1ec63b91576f..70d94c11ffdc 100644
--- a/chart2/source/view/main/DummyXShape.cxx
+++ b/chart2/source/view/main/DummyXShape.cxx
@@ -30,6 +30,9 @@
 
 #include <algorithm>
 
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/matrix/b3dhommatrix.hxx>
+
 #define ENABLE_DEBUG_PROPERTIES 0
 
 using namespace com::sun::star;
@@ -321,6 +324,168 @@ DummyCone::DummyCone(const drawing::Position3D& rPos, const drawing::Direction3D
     setPosition(Position3DToAWTPoint(rPos));
     setSize(Direction3DToAWTSize(rSize));
 }
+void appendAndCloseBezierCoords( drawing::PolyPolygonBezierCoords& rReturn, const drawing::PolyPolygonBezierCoords& rAdd, sal_Bool bAppendInverse )
+{
+    if(!rAdd.Coordinates.getLength())
+        return;
+    sal_Int32 nAddCount = rAdd.Coordinates[0].getLength();
+    if(!nAddCount)
+        return;
+
+    sal_Int32 nOldCount = rReturn.Coordinates[0].getLength();
+
+    rReturn.Coordinates[0].realloc(nOldCount+nAddCount+1);
+    rReturn.Flags[0].realloc(nOldCount+nAddCount+1);
+
+    for(sal_Int32 nN=0;nN<nAddCount; nN++ )
+    {
+        sal_Int32 nAdd = bAppendInverse ? (nAddCount-1-nN) : nN;
+        rReturn.Coordinates[0][nOldCount+nN] = rAdd.Coordinates[0][nAdd];
+        rReturn.Flags[0][nOldCount+nN] = rAdd.Flags[0][nAdd];
+    }
+
+    //close
+    rReturn.Coordinates[0][nOldCount+nAddCount] = rReturn.Coordinates[0][0];
+    rReturn.Flags[0][nOldCount+nAddCount] = rReturn.Flags[0][0];
+}
+
+drawing::PolyPolygonBezierCoords getCircularArcBezierCoords(
+        double fStartAngleRadian, double fWidthAngleRadian, double fUnitRadius
+        , const ::basegfx::B2DHomMatrix& rTransformationFromUnitCircle
+        , const double fAngleSubdivisionRadian )
+{
+    //at least one polygon is created using two normal and two control points
+    //if the angle is larger it is separated into multiple sub angles
+
+    drawing::PolyPolygonBezierCoords aReturn = drawing::PolyPolygonBezierCoords();
+    sal_Int32 nSegmentCount = static_cast< sal_Int32 >( fWidthAngleRadian/fAngleSubdivisionRadian );
+    if( fWidthAngleRadian > fAngleSubdivisionRadian*nSegmentCount )
+        nSegmentCount++;
+
+    double fFirstSegmentAngle = fAngleSubdivisionRadian;
+    double fLastSegmentAngle = fAngleSubdivisionRadian;
+    if(nSegmentCount==1)
+    {
+        fFirstSegmentAngle = fWidthAngleRadian;
+        fLastSegmentAngle = 0.0;
+    }
+    else
+    {
+        double fFirstAngleOnSubDevision = (static_cast<sal_Int32>(fStartAngleRadian/fAngleSubdivisionRadian)+1)*fAngleSubdivisionRadian;
+        if( !::rtl::math::approxEqual( fStartAngleRadian, fFirstAngleOnSubDevision ) )
+            fFirstSegmentAngle = fFirstAngleOnSubDevision-fStartAngleRadian;
+
+        if(nSegmentCount>1)
+        {
+            fLastSegmentAngle = fWidthAngleRadian-fFirstSegmentAngle-fAngleSubdivisionRadian*(nSegmentCount-2);
+            if( fLastSegmentAngle<0 )
+                nSegmentCount--;
+            if( fLastSegmentAngle>fAngleSubdivisionRadian )
+            {
+                fLastSegmentAngle-=fAngleSubdivisionRadian;
+                nSegmentCount++;
+            }
+        }
+    }
+
+    sal_Int32 nPointCount     = 1 + 3*nSegmentCount; //first point of next segment equals last point of former segment
+
+    aReturn.Coordinates = drawing::PointSequenceSequence(1);
+    aReturn.Flags       = drawing::FlagSequenceSequence(1);
+
+    drawing::PointSequence aPoints(nPointCount);
+    drawing::FlagSequence  aFlags(nPointCount);
+
+    //
+
+    //!! applying matrix to vector does ignore translation, so it is important to use a B2DPoint here instead of B2DVector
+    ::basegfx::B2DPoint P0,P1,P2,P3;
+
+    sal_Int32 nPoint=0;
+    double fCurrentRotateAngle = fStartAngleRadian;
+    for(sal_Int32 nSegment=0; nSegment<nSegmentCount; nSegment++)
+    {
+        double fCurrentSegmentAngle = fAngleSubdivisionRadian;
+        if(nSegment==0)//first segment gets only a smaller peace until the next subdevision
+            fCurrentSegmentAngle = fFirstSegmentAngle;
+        else if(nSegment==(nSegmentCount-1)) //the last segment gets the rest angle that does not fit into equal pieces
+            fCurrentSegmentAngle = fLastSegmentAngle;
+
+        //first create untransformed points for a unit circle arc:
+        const double fCos = cos(fCurrentSegmentAngle/2.0);
+        const double fSin = sin(fCurrentSegmentAngle/2.0);
+        P0.setX(fCos);
+        P3.setX(fCos);
+        P0.setY(-fSin);
+        P3.setY(-P0.getY());
+
+        P1.setX((4.0-fCos)/3.0);
+        P2.setX(P1.getX());
+        P1.setY((1.0-fCos)*(fCos-3.0)/(3.0*fSin));
+        P2.setY(-P1.getY());
+        //transform thus startangle equals NULL
+        ::basegfx::B2DHomMatrix aStart;
+        aStart.rotate(fCurrentSegmentAngle/2.0 + fCurrentRotateAngle );
+        fCurrentRotateAngle+=fCurrentSegmentAngle;
+
+        aStart.scale( fUnitRadius, fUnitRadius );
+
+        //apply given transformation to get final points
+        P0 = rTransformationFromUnitCircle*(aStart*P0);
+        P1 = rTransformationFromUnitCircle*(aStart*P1);
+        P2 = rTransformationFromUnitCircle*(aStart*P2);
+        P3 = rTransformationFromUnitCircle*(aStart*P3);
+
+        aPoints[nPoint].X = static_cast< sal_Int32 >( P0.getX());
+        aPoints[nPoint].Y = static_cast< sal_Int32 >( P0.getY());
+        aFlags [nPoint++] = drawing::PolygonFlags_NORMAL;
+
+        aPoints[nPoint].X = static_cast< sal_Int32 >( P1.getX());
+        aPoints[nPoint].Y = static_cast< sal_Int32 >( P1.getY());
+        aFlags[nPoint++] = drawing::PolygonFlags_CONTROL;
+
+        aPoints[nPoint].X = static_cast< sal_Int32 >( P2.getX());
+        aPoints[nPoint].Y = static_cast< sal_Int32 >( P2.getY());
+        aFlags [nPoint++] = drawing::PolygonFlags_CONTROL;
+
+        if(nSegment==(nSegmentCount-1))
+        {
+            aPoints[nPoint].X = static_cast< sal_Int32 >( P3.getX());
+            aPoints[nPoint].Y = static_cast< sal_Int32 >( P3.getY());
+            aFlags [nPoint++] = drawing::PolygonFlags_NORMAL;
+        }
+    }
+
+    aReturn.Coordinates[0] = aPoints;
+    aReturn.Flags[0] = aFlags;
+
+    return aReturn;
+}
+
+
+drawing::PolyPolygonBezierCoords getRingBezierCoords(
+            double fUnitCircleInnerRadius
+            , double fUnitCircleOuterRadius
+            , double fStartAngleRadian, double fWidthAngleRadian
+            , ::basegfx::B2DHomMatrix aTransformationFromUnitCircle
+            , const double fAngleSubdivisionRadian )
+{
+    drawing::PolyPolygonBezierCoords aReturn = drawing::PolyPolygonBezierCoords();
+
+    aReturn.Coordinates = drawing::PointSequenceSequence(1);
+    aReturn.Flags       = drawing::FlagSequenceSequence(1);
+
+    drawing::PolyPolygonBezierCoords aOuterArc = getCircularArcBezierCoords(
+        fStartAngleRadian, fWidthAngleRadian, fUnitCircleOuterRadius, aTransformationFromUnitCircle, fAngleSubdivisionRadian );
+    aReturn.Coordinates[0] = aOuterArc.Coordinates[0];
+    aReturn.Flags[0] = aOuterArc.Flags[0];
+
+    drawing::PolyPolygonBezierCoords aInnerArc = getCircularArcBezierCoords(
+        fStartAngleRadian, fWidthAngleRadian, fUnitCircleInnerRadius, aTransformationFromUnitCircle, fAngleSubdivisionRadian );
+    appendAndCloseBezierCoords( aReturn, aInnerArc, sal_True );
+
+    return aReturn;
+}
 
 DummyPieSegment2D::DummyPieSegment2D(double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree,
         double fUnitCircleInnerRadius, double fUnitCircleOuterRadius,
@@ -333,6 +498,46 @@ DummyPieSegment2D::DummyPieSegment2D(double fUnitCircleStartAngleDegree, double
     maUnitCircleToScene(rUnitCircleToScene)
 {
 }
+void DummyPieSegment2D::render()
+{
+    DummyChart* pChart = getRootShape();
+
+    while(mfUnitCircleWidthAngleDegree>360)
+        mfUnitCircleWidthAngleDegree -= 360.0;
+    while(mfUnitCircleWidthAngleDegree<0)
+        mfUnitCircleWidthAngleDegree += 360.0;
+    ::basegfx::B2DHomMatrix aTransformationFromUnitCircle( IgnoreZ( HomogenMatrixToB3DHomMatrix(maUnitCircleToScene) ) );
+    aTransformationFromUnitCircle.translate(maOffset.DirectionX,maOffset.DirectionY);
+    const double fAngleSubdivisionRadian = F_PI/30.0;
+
+    drawing::PolyPolygonBezierCoords aCoords = getRingBezierCoords(
+                    mfUnitCircleInnerRadius, mfUnitCircleOuterRadius
+                    , mfUnitCircleStartAngleDegree*F_PI/180.0, mfUnitCircleWidthAngleDegree*F_PI/180.0
+                    , aTransformationFromUnitCircle, fAngleSubdivisionRadian );
+
+    sal_Int32 pointCount = aCoords.Coordinates[0].getLength();
+    for (sal_Int32 i = 0; i < pointCount; i++)
+    {
+        com::sun::star::awt::Point p = aCoords.Coordinates[0][i];
+        pChart->m_GLRender.SetPieSegment2DShapePoint((float)p.X, (float)p.Y, pointCount);
+    }
+
+    std::map<OUString, uno::Any>::const_iterator itr = maProperties.find(UNO_NAME_FILLCOLOR);
+    if(itr != maProperties.end())
+    {
+        sal_Int32 nColor = itr->second.get<sal_Int32>();
+        pChart->m_GLRender.SetColor(nColor);
+    }
+    itr = maProperties.find(UNO_NAME_FILL_TRANSPARENCE);
+    if(itr != maProperties.end())
+    {
+        sal_Int32 transparency = itr->second.get<sal_Int32>();
+        pChart->m_GLRender.SetTransparency(transparency&(0xFF));
+    }
+
+    pChart->m_GLRender.RenderPieSegment2DShape();
+
+}
 
 DummyPieSegment::DummyPieSegment(double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree,
         double fUnitCircleInnerRadius, double fUnitCircleOuterRadius,
diff --git a/chart2/source/view/main/OpenGLRender.cxx b/chart2/source/view/main/OpenGLRender.cxx
index d96b2190ffa1..0419a5777916 100755
--- a/chart2/source/view/main/OpenGLRender.cxx
+++ b/chart2/source/view/main/OpenGLRender.cxx
@@ -1726,4 +1726,70 @@ void OpenGLRender::SetChartTransparencyGradient(long transparencyGradient)
         m_BackgroundColor[15] = 0.0;
     }
 }
+int OpenGLRender::SetPieSegment2DShapePoint(float x, float y, int listLength)
+{
+    if (m_PieSegment2DPointList.empty())
+    {
+        m_PieSegment2DPointList.reserve(listLength);
+    }
+    float actualX = (x / OPENGL_SCALE_VALUE);
+    float actualY = (y / OPENGL_SCALE_VALUE);
+    m_PieSegment2DPointList.push_back(actualX);
+    m_PieSegment2DPointList.push_back(actualY);
+    m_PieSegment2DPointList.push_back(m_fZStep);
+
+    if (m_PieSegment2DPointList.size() == size_t(listLength * 3))
+    {
+        m_PieSegment2DShapePointList.push_back(m_PieSegment2DPointList);
+        m_PieSegment2DPointList.clear();
+    }
+    return 0;
+}
+
+int OpenGLRender::RenderPieSegment2DShape()
+{
+    int listNum = m_PieSegment2DShapePointList.size();
+    PosVecf3 trans = {0.0f, 0.0f, 0.0f};
+    PosVecf3 angle = {0.0f, 0.0f, 0.0f};
+    PosVecf3 scale = {1.0f, 1.0f, 1.0f};
+    MoveModelf(trans, angle, scale);
+    m_MVP = m_Projection * m_View * m_Model;
+
+    for (int i = 0; i < listNum; i++)
+    {
+        PieSegment2DPointList &pointList = m_PieSegment2DShapePointList.back();
+        //fill vertex buffer
+        glBindBuffer(GL_ARRAY_BUFFER, m_VertexBuffer);
+        glBufferData(GL_ARRAY_BUFFER, pointList.size() * sizeof(float), &pointList[0] , GL_STATIC_DRAW);
+        // Use our shader
+        glUseProgram(m_CommonProID);
+
+        glUniform4fv(m_2DColorID, 1, &m_2DColor[0]);
+
+        glUniformMatrix4fv(m_MatrixID, 1, GL_FALSE, &m_MVP[0][0]);
+
+        // 1rst attribute buffer : vertices
+        glEnableVertexAttribArray(m_2DVertexID);
+        glBindBuffer(GL_ARRAY_BUFFER, m_VertexBuffer);
+        glVertexAttribPointer(
+            m_2DVertexID,                  // attribute. No particular reason for 0, but must match the layout in the shader.
+            3,                  // size
+            GL_FLOAT,           // type
+            GL_FALSE,           // normalized?
+            0,                  // stride
+            (void*)0            // array buffer offset
+            );
+        glDrawArrays(GL_POLYGON, 0, pointList.size() / 3); // 12*3 indices starting at 0 -> 12 triangles
+        glDisableVertexAttribArray(m_2DVertexID);
+        glUseProgram(0);
+        m_PieSegment2DShapePointList.pop_back();
+
+    }
+    glEnable(GL_MULTISAMPLE);
+    m_fZStep += 0.01f;
+
+    CHECK_GL_ERROR();
+    return 0;
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/chart2/source/view/main/OpenGLRender.hxx b/chart2/source/view/main/OpenGLRender.hxx
index 435e76dbfa40..6f2a8d91e953 100755
--- a/chart2/source/view/main/OpenGLRender.hxx
+++ b/chart2/source/view/main/OpenGLRender.hxx
@@ -100,6 +100,7 @@ typedef struct TextInfo
 }TextInfo;
 
 typedef std::vector<GLfloat> Area2DPointList;
+typedef std::vector<GLfloat> PieSegment2DPointList;
 
 /// Holds the information of our new child window
 struct GLWindow
@@ -175,6 +176,8 @@ public:
     int RenderArea2DShape();
     void SetChartTransparencyGradient(long transparencyGradient);
 
+    int SetPieSegment2DShapePoint(float x, float y, int listLength);
+    int RenderPieSegment2DShape();
 #if DEBUG_POSITIONING
     void renderDebug();
 #endif
@@ -295,6 +298,9 @@ private:
     float m_BackgroundColor[16];
     glm::vec4 m_ClearColor;
 
+    PieSegment2DPointList m_PieSegment2DPointList;
+    std::list <PieSegment2DPointList> m_PieSegment2DShapePointList;
+
 #if DEBUG_POSITIONING
     GLuint m_DebugProID;
     GLuint m_DebugVertexID;