gbuffer.cpp Example File

  /****************************************************************************
  **
  ** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the Qt3D module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** "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 Qt Company Ltd 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
  ** OWNER 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."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  #include "gbuffer.h"

  GBuffer::GBuffer(Qt3DCore::QNode *parent)
      : Qt3DRender::QRenderTarget(parent)
  {
      const Qt3DRender::QAbstractTexture::TextureFormat formats[AttachmentsCount] = {
          Qt3DRender::QAbstractTexture::RGBA32F,
          Qt3DRender::QAbstractTexture::RGB32F,
          Qt3DRender::QAbstractTexture::RGB16F,
          Qt3DRender::QAbstractTexture::D32F
      };

      const Qt3DRender::QRenderTargetOutput::AttachmentPoint attachmentPoints[AttachmentsCount] = {
          Qt3DRender::QRenderTargetOutput::Color0,
          Qt3DRender::QRenderTargetOutput::Color1,
          Qt3DRender::QRenderTargetOutput::Color2,
          Qt3DRender::QRenderTargetOutput::Depth
      };

      for (int i = 0; i < AttachmentsCount; i++) {
          Qt3DRender::QRenderTargetOutput *output = new Qt3DRender::QRenderTargetOutput(this);

          m_textures[i] = new Qt3DRender::QTexture2D();
          m_textures[i]->setFormat(formats[i]);
          m_textures[i]->setWidth(1024);
          m_textures[i]->setHeight(1024);
          m_textures[i]->setGenerateMipMaps(false);
          m_textures[i]->setWrapMode(Qt3DRender::QTextureWrapMode(Qt3DRender::QTextureWrapMode::ClampToEdge));
          m_textures[i]->setMinificationFilter(Qt3DRender::QAbstractTexture::Linear);
          m_textures[i]->setMagnificationFilter(Qt3DRender::QAbstractTexture::Linear);

          output->setTexture(m_textures[i]);
          output->setAttachmentPoint(attachmentPoints[i]);
          addOutput(output);
      }
  }

  Qt3DRender::QAbstractTexture *GBuffer::colorTexture() const
  {
      return m_textures[Color];
  }

  Qt3DRender::QAbstractTexture *GBuffer::positionTexture() const
  {
      return m_textures[Position];
  }

  Qt3DRender::QAbstractTexture *GBuffer::normalTexture() const
  {
      return m_textures[Normal];
  }

  Qt3DRender::QAbstractTexture *GBuffer::depthTexture() const
  {
      return m_textures[Depth];
  }