TextNode.hh

/*===========================================================================*\
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//=============================================================================
//
//  CLASS PointNode
//
//=============================================================================
 
#ifndef ACG_TEXTNODE_HH
#define ACG_TEXTNODE_HH
 
 
//== INCLUDES =================================================================
 
#include "BaseNode.hh"
#include "TransformNode.hh"
#include "DrawModes.hh"
#include <ACG/GL/IRenderer.hh>
#include <ACG/GL/VertexDeclaration.hh>
#include <vector>
#include <QFont>
#include <QFontMetrics>
#include <QImage>
#include <QPainter>
#include <QOpenGLWidget>
 
 
//== NAMESPACES ===============================================================
 
namespace ACG {
namespace SceneGraph {
 
//== CLASS DEFINITION =========================================================
 
 
 
class ACGDLLEXPORT TextNode : public BaseNode
{
public:
 
  enum TextMode {
    SCREEN_ALIGNED, 
    SCREEN_ALIGNED_STATIC_SIZE, 
    OBJECT_ALIGNED  
  };
 
  TextNode( BaseNode*     _parent=0,
            const std::string&  _name="<TextNode>",
            TextMode     _textMode = SCREEN_ALIGNED,
            bool         _alwaysOnTop = false);
 
  ~TextNode();
 
  ACG_CLASSNAME(TextNode);
 
  DrawModes::DrawMode  availableDrawModes() const override;
 
  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax) override;
 
  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode) override;
 
  void enter(GLState& _state, const DrawModes::DrawMode& _drawmode) override;
  void enterCompat(GLState& _state, const DrawModes::DrawMode& _drawmode);
 
  void leave(GLState& _state, const DrawModes::DrawMode& _drawmode) override;
  void leaveCompat(GLState& _state, const DrawModes::DrawMode& _drawmode);
 
  void getRenderObjects(ACG::IRenderer* _renderer, ACG::GLState&  _state , const ACG::SceneGraph::DrawModes::DrawMode&  _drawMode , const ACG::SceneGraph::Material* _mat) override;
 
  void setRenderingMode(TextMode _textMode);
 
  void setAlwaysOnTop(bool _alwaysOnTop);
 
  bool alwaysOnTop();
 
  TextMode renderingMode();
 
  void setText(std::string _text);
 
  void setSize(const double _size);
 
  void setPixelSize(const unsigned int _size);
 
  void setFont(const QFont& _font);
 
  float lastScale() {return lastScale_;};
 
protected:
  static void updateFont();
 
private:
  static quint32 nearestPowerOfTwo(quint32 num);
 
  void updateVBO();
 
  void bindVBO();
 
  void unbindVBO();
 
  void applyScreenAligned(GLState &_state);
 
  static std::map< char, std::pair<unsigned int, unsigned int> > createMap();
 
private:
 
  double size_;
 
  unsigned pixelSize_;
 
  std::string text_;
 
  TextMode textMode_;
 
  GLuint vbo_;
 
  std::vector<GLfloat> vertexBuffer_;
  size_t oldVboSize_;
 
  bool blendEnabled_;
 
  bool texture2dEnabled_;
 
  bool cullFaceEnabled_;
 
  bool depthEnabled_;
 
  bool alwaysOnTop_;
 
  bool alphaTest_;
 
  float alphaTestValue_;
 
  GLenum alphaTestFunc_;
 
  GLint blendSrc_;
 
  GLint blendDest_;
 
  ACG::VertexDeclaration vertexDecl_;
 
  float lastScale_;
 
  static std::map< char, std::pair<unsigned int, unsigned int> > charToIndex_;
 
  static QFont qfont_;
 
  static GLuint texture_;
 
  static int imageWidth_;
 
  static int imageHeight_;
 
  static QFontMetrics fontMetric_;
 
  static const int numberOfChars_ = 94;
 
  static const unsigned int rows_ = 10;
 
  static const unsigned int columns_ = 10;
 
  static bool initialised_;
 
  static QColor color_;
};
 
//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#endif // ACG_TEXTNODE_HH defined
//=============================================================================