TextureNode.hh

/*===========================================================================*\
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//=============================================================================
//
//  CLASS TextureNode
//
//=============================================================================


#ifndef ACG_TEXTURE_NODE_HH
#define ACG_TEXTURE_NODE_HH


//== INCLUDES =================================================================


#include "BaseNode.hh"

#include <ACG/GL/globjects.hh>

#include <string>
#include <QImage>


//== NAMESPACES ===============================================================

namespace ACG {
namespace SceneGraph {


//== CLASS DEFINITION =========================================================


class ACGDLLEXPORT TextureNode : public BaseNode
{
public:

  TextureNode( BaseNode*           _parent = 0,
                    const std::string&  _name = "<TextureNode>",
               bool                _texture_repeat = true,
               GLint               _texture_filter = GL_LINEAR );

  virtual ~TextureNode();

  ACG_CLASSNAME(TextureNode);

  bool alpha() { return alpha_; }

  void set_alpha(bool _status) { alpha_ = _status; }

  bool repeat() { return texture_repeat_; }

  void set_repeat(bool _status) { texture_repeat_ = _status; }

  GLint filter() { return texture_filter_; }

  void set_filter( GLint _filter ) { texture_filter_ = _filter; }

  void set_texture_mode( GLenum _mode) { tex_mode_ = _mode; }
  
  void enable_mipmapping();
  
  void disable_mipmapping();
  
  bool mipmapping() const { return mipmapping_; }


//===========================================================================
//===========================================================================

//===========================================================================
//===========================================================================

public:


  GLuint add_texture(const QImage& _image);

  private:
    void applyTextureParameters( int _id );

    void applyGLSettings(  );

//===========================================================================
//===========================================================================

  public :

  bool activateTexture(GLuint _id);

  GLuint activeTexture();

  bool read(const char* _filename);

  void set_texture(const QImage& _image);

  void set_texture(const float * _image, int _width, int _height);


  void set_texture(const unsigned char * _image, int _width, int _height);

//===========================================================================
//===========================================================================

  public :

  bool read(const char* _filename, GLuint _id );

  void set_texture(const QImage& _image, GLuint _id);

  void set_texture(const float * _image, int _width, int _height, GLuint _id);


  void set_texture(const unsigned char * _image, int _width, int _height, GLuint _id);

//===========================================================================
//===========================================================================

public:
  void enter(GLState& _state, const DrawModes::DrawMode& _drawmode);

  void leave(GLState& _state, const DrawModes::DrawMode& _drawmode);

  void enterPick(GLState& _state, PickTarget _target, const DrawModes::DrawMode& _drawMode );

  void leavePick(GLState& _state, PickTarget _target, const DrawModes::DrawMode& _drawMode );

private:

  class TextureInfo {
    public:
      TextureInfo():
//       id(0),
      tex(0),
      mipmapAvailable(false)
//       width(0),
//       height(0)
      {}

      Texture2D* tex;
//       GLuint id;
//       GLenum target;
      bool mipmapAvailable;
//       int width;
//       int height;
  };

  void setTextureDataGL ( GLuint _textureId,
                        GLenum _target,
                        GLint _width ,
                        GLint _height,
                        GLenum _format ,
                        GLenum _type,
                        const void * _data) ;

  std::vector<TextureInfo> textures_;
  bool                     alpha_;
  bool                     texture_repeat_;
  GLenum                   tex_mode_;
  GLint                    texture_filter_;
  
  bool                     mipmapping_globally_active_;
  bool                     last_mipmapping_status_;
  bool                     mipmapping_;

  void checkEmpty();

  int available( GLuint _id  );
  
  void updateMipmaps(bool _mipmap);

  int activeTexture_;

  DrawModes::DrawMode open_volume_mesh_texture_draw_modes_;
};


//=============================================================================
} // namespace SceneGraph
} // namespace ACG
//=============================================================================
#endif // ACG_TEXTURE_NODE_HH defined
//=============================================================================