text: #ifndef GLES2_EIGHTLAYERBLEND_EIGHTLAYERBLEND_HPP
  #define GLES2_EIGHTLAYERBLEND_EIGHTLAYERBLEND_HPP
  /****************************************************************************************************************************************************
   * Copyright (c) 2014 Freescale Semiconductor, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   *    * Redistributions of source code must retain the above copyright notice,
   *      this list of conditions and the following disclaimer.
   *
   *    * 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.
   *
   *    * Neither the name of the Freescale Semiconductor, Inc. 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.
   *
   ****************************************************************************************************************************************************/
  
  #include <FslDemoApp/OpenGLES2/DemoAppGLES2.hpp>
  #include <FslUtil/OpenGLES2/GLProgram.hpp>
  #include <FslUtil/OpenGLES2/GLTexture.hpp>
  #include <FslUtil/OpenGLES2/GLVertexBuffer.hpp>
  #include <FslUtil/OpenGLES2/GLValues.hpp>
  #include <FslBase/Math/Point2.hpp>
  #include <FslBase/Math/Matrix.hpp>
  #include <array>
  
  namespace Fsl
  {
    class EightLayerBlend : public DemoAppGLES2
    {
      GLES2::GLProgram m_program;
      GLES2::GLVertexBuffer m_vertexBuffer;
      GLint m_locMatModelViewProj;
      Point2 m_layerSize;
  
      struct LayerRecord
      {
        GLES2::GLTexture Texture;
        float Position{0};
        LayerRecord() = default;
      };
      std::array<LayerRecord, 8> m_layers;
      float m_angle;
      Matrix m_matViewProj;
  
    public:
      explicit EightLayerBlend(const DemoAppConfig& config);
      ~EightLayerBlend() override;
  
    protected:
      void Update(const DemoTime& demoTime) override;
      void Draw(const DemoTime& demoTime) override;
    };
  }
  
  #endif
  