ScreenQuad.hh

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//=============================================================================
//
//  CLASS ScreenQuad
//
//=============================================================================

#ifndef ACG_SCREENQUAD_HH
#define ACG_SCREENQUAD_HH


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

#include <vector>

#include <ACG/GL/gl.hh>
#include <ACG/GL/VertexDeclaration.hh>


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


namespace ACG {


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


class ACGDLLEXPORT ScreenQuad
{
public:
  ~ScreenQuad();


  static void draw(GLSL::Program* _prog = 0);

  static void drawInstanced(int _count, GLSL::Program* _prog = 0);


  static void drawTexture2D(GLuint _texture, const Vec2f& _offset = Vec2f(0.0f, 0.0f),
                                             const Vec2f& _size   = Vec2f(1.0f, 1.0f));

private:

  ScreenQuad();


  static ScreenQuad& instance();

  void init();

  void intDraw(GLSL::Program* _prog, int _numInstances = 0);



  GLuint vbo_;

  VertexDeclaration* decl_;


  GLSL::Program* texDrawProg_;
};


//=============================================================================
} // namespace ACG
//=============================================================================
#endif // ACG_SCREENQUAD_HH defined
//=============================================================================