ScreenQuad.hh

/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
 *                                                                           *
\*===========================================================================*/
 
 
//=============================================================================
//
//  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
//=============================================================================