add position control to screen text

Change-Id: I6bf340acb3aa50f2ce534b10d5be32c4615b0688

chart2/source/view/charttypes/GL3DBarChart.cxx

@@ -25,6 +25,8 @@
 #endif
 
 #define BENCH_MARK_MODE false
+#define CLICK_EVENT_ID 1
+#define SHAPE_START_ID 10
 
 using namespace com::sun::star;
 
@@ -489,7 +491,7 @@ void GL3DBarChart::create3DShapes(const boost::ptr_vector<VDataSeries>& rDataSer
     // Each series of data flows from left to right, and multiple series are
     // stacked vertically along y axis.
 
-    sal_uInt32 nId = 1;
+    sal_uInt32 nId = SHAPE_START_ID;
     float nXEnd = 0.0;
     float nYPos = 0.0;
 
@@ -805,11 +807,13 @@ void GL3DBarChart::clickedAt(const Point& rPos, sal_uInt16 nButtons)
         return;
 
     const BarInformation& rBarInfo = itr->second;
-
+    glm::vec3 textPos = glm::vec3(rBarInfo.maPos.x + BAR_SIZE_X / 2.0f,
+                                  rBarInfo.maPos.y + BAR_SIZE_Y / 2.0f,
+                                  rBarInfo.maPos.z);
     maShapes.push_back(new opengl3D::ScreenText(mpRenderer.get(), *mpTextCache,
-                OUString("Value: ") + OUString::number(rBarInfo.mnVal), 0));
+                OUString("Value: ") + OUString::number(rBarInfo.mnVal), CLICK_EVENT_ID));
     opengl3D::ScreenText* pScreenText = static_cast<opengl3D::ScreenText*>(&maShapes.back());
-    pScreenText->setPosition(glm::vec2(-0.9f, 0.9f), glm::vec2(-0.6f, 0.8f));
+    pScreenText->setPosition(glm::vec2(-0.9f, 0.9f), glm::vec2(-0.6f, 0.8f), textPos);
     pScreenText->render();
 
     glm::vec3 maTargetPosition = rBarInfo.maPos;

chart2/source/view/inc/3DChartObjects.hxx

@@ -111,12 +111,13 @@ public:
     ScreenText(OpenGL3DRenderer* pRenderer, TextCache& rTextCache, const OUString& rStr, sal_uInt32 nId);
 
     virtual void render() SAL_OVERRIDE;
-    void setPosition(const glm::vec2& rTopLeft, const glm::vec2& rBottomRight);
+    void setPosition(const glm::vec2& rTopLeft, const glm::vec2& rBottomRight, glm::vec3 r3DPos = glm::vec3(0.0, 0.0, 0.0));
 
 private:
     TextCacheItem maText;
     glm::vec2 maTopLeft;
     glm::vec2 maBottomRight;
+    glm::vec3 ma3DPos;
 };
 
 class Rectangle : public Renderable3DObject

chart2/source/view/inc/GL3DRenderer.hxx

@@ -138,8 +138,10 @@ struct PackedVertex{
 struct TextInfo
 {
     glm::vec4 id;
+    sal_uInt32 uniqueId;
     GLuint texture;
     float vertex[12];
+    glm::vec3 pos;
 };
 
 struct TextureArrayInfo
@@ -197,7 +199,7 @@ public:
                            sal_uInt32 nUniqueId);
     void CreateScreenTextTexture(const boost::shared_array<sal_uInt8> &bitmapBuf,
                                  ::Size maSizePixels, const glm::vec2& vTopLeft,
-                                 const glm::vec2& vBottomRight, sal_uInt32 nUniqueId);
+                                 const glm::vec2& vBottomRight, glm::vec3 vPos, sal_uInt32 nUniqueId);
     void ProcessUnrenderedShape(bool bNewScene);
 
     void SetPickingMode(bool bPickingMode);

chart2/source/view/main/3DChartObjects.cxx

@@ -134,16 +134,17 @@ ScreenText::ScreenText(OpenGL3DRenderer* pRenderer, TextCache& rTextCache, const
 {
 }
 
-void ScreenText::setPosition(const glm::vec2& rTopLeft, const glm::vec2& rBottomRight)
+void ScreenText::setPosition(const glm::vec2& rTopLeft, const glm::vec2& rBottomRight, glm::vec3 r3DPos)
 {
     maTopLeft = rTopLeft;
     maBottomRight = rBottomRight;
+    ma3DPos = r3DPos;
 }
 
 void ScreenText::render()
 {
     mpRenderer->CreateScreenTextTexture(maText.maPixels, maText.maSize,
-                                        maTopLeft, maBottomRight,
+                                        maTopLeft, maBottomRight, ma3DPos,
                                         mnUniqueId);
 }
 

chart2/source/view/main/GL3DRenderer.cxx

@@ -1666,13 +1666,14 @@ void OpenGL3DRenderer::RenderExtrude3DObject()
 void OpenGL3DRenderer::CreateScreenTextTexture(
         const boost::shared_array<sal_uInt8> &bitmapBuf,
         ::Size maSizePixels, const glm::vec2& vTopLeft,
-        const glm::vec2& vBottomRight, sal_uInt32 nUniqueId)
+        const glm::vec2& vBottomRight, glm::vec3 vPos, sal_uInt32 nUniqueId)
 {
     long bmpWidth = maSizePixels.Width();
     long bmpHeight = maSizePixels.Height();
 
     TextInfo aTextInfo;
     aTextInfo.id = getColorAsVector(nUniqueId);
+    aTextInfo.uniqueId = nUniqueId;
     aTextInfo.vertex[0] = vBottomRight.x;
     aTextInfo.vertex[1] = vBottomRight.y;
     aTextInfo.vertex[2] = 0;
@@ -1688,6 +1689,7 @@ void OpenGL3DRenderer::CreateScreenTextTexture(
     aTextInfo.vertex[9] = vTopLeft.x;
     aTextInfo.vertex[10] = vBottomRight.y;
     aTextInfo.vertex[11] = 0;
+    aTextInfo.pos = vPos;
 
     CHECK_GL_ERROR();
     glGenTextures(1, &aTextInfo.texture);
@@ -1868,16 +1870,37 @@ void OpenGL3DRenderer::ReleaseScreenTextShapes()
 
 void OpenGL3DRenderer::RenderScreenTextShape()
 {
+    glUseProgram(maResources.m_ScreenTextProID);
     CHECK_GL_ERROR();
     for (size_t i = 0; i < m_ScreenTextInfoList.size(); i++)
     {
         TextInfo &textInfo = m_ScreenTextInfoList[i];
+        //calc the postition and check whether it can be displayed
+        float xTrans = 0.0f;
+        float yTrans = 0.0f;
+        if (textInfo.uniqueId)
+        {
+            glm::vec3 worldPos = glm::vec3(m_ScrollMoveMatrix * m_GlobalScaleMatrix * glm::vec4(textInfo.pos, 1));
+            if (worldPos.x < m_fMinCoordX)
+                continue;
+            glm::vec4 pos = m_3DProjection * m_3DView * glm::vec4(worldPos, 1);
+            xTrans = pos.x / pos.w;
+            yTrans = pos.y / pos.w;
+            for (int j = 0; j < 12; j++)
+            {
+                if (j % 3 == 0)
+                {
+                    textInfo.vertex[j] += xTrans;
+                }
+                if (j % 3 == 1)
+                {
+                    textInfo.vertex[j] += yTrans;
+                }
+            }
+        }
         glBindBuffer(GL_ARRAY_BUFFER, m_VertexBuffer);
         CHECK_GL_ERROR();
         glBufferData(GL_ARRAY_BUFFER, sizeof(textInfo.vertex), textInfo.vertex, GL_STATIC_DRAW);
-        CHECK_GL_ERROR();
-        glUseProgram(maResources.m_ScreenTextProID);
-
         CHECK_GL_ERROR();
 
         // 1rst attribute buffer : vertices
@@ -1912,13 +1935,13 @@ void OpenGL3DRenderer::RenderScreenTextShape()
         //TODO: moggi: get rid fo GL_QUADS
         glDrawArrays(GL_QUADS, 0, 4);
         CHECK_GL_ERROR();
-        glDisableVertexAttribArray(maResources.m_ScreenTextTexCoordID);
-        CHECK_GL_ERROR();
-        glDisableVertexAttribArray(maResources.m_ScreenTextVertexID);
-        CHECK_GL_ERROR();
-        glBindTexture(GL_TEXTURE_2D, 0);
-        glUseProgram(0);
     }
+    glDisableVertexAttribArray(maResources.m_ScreenTextTexCoordID);
+    CHECK_GL_ERROR();
+    glDisableVertexAttribArray(maResources.m_ScreenTextVertexID);
+    CHECK_GL_ERROR();
+    glBindTexture(GL_TEXTURE_2D, 0);
+    glUseProgram(0);
     CHECK_GL_ERROR();
 }
 void OpenGL3DRenderer::ReleaseTextShapesBatch()