RenderTarget.h

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/*
Copyright 2007-2025. Algoryx Simulation AB.
 
All AGX source code, intellectual property, documentation, sample code,
tutorials, scene files and technical white papers, are copyrighted, proprietary
and confidential material of Algoryx Simulation AB. You may not download, read,
store, distribute, publish, copy or otherwise disseminate, use or expose this
material unless having a written signed agreement with Algoryx Simulation AB, or having been
advised so by Algoryx Simulation AB for a time limited evaluation, or having purchased a
valid commercial license from Algoryx Simulation AB.
 
Algoryx Simulation AB disclaims all responsibilities for loss or damage caused
from using this software, unless otherwise stated in written agreements with
Algoryx Simulation AB.
*/
 
#pragma once
 
#include <agxOSG/export.h>
#include <agxOSG/ImageCapture.h>
#include <agx/Object.h>
#include <agx/Vec2.h>
 
#include <agx/PushDisableWarnings.h> // Disabling warnings. Include agx/PopDisableWarnings.h below!
#include <osg/Node>
#include <osg/Geometry>
#include <osg/Texture2D>
#include <osg/Image>
#include <osg/Camera>
#include <agx/PopDisableWarnings.h> // End of disabled warnings.
 
namespace agxOSG
{
  AGX_DECLARE_POINTER_TYPES(RenderTarget);
  AGX_DECLARE_VECTOR_TYPES(RenderTarget);
 
  class AGXOSG_EXPORT RenderTarget : public agx::Object
  {
  public:
 
 
    enum BufferComponent
    {
      COLOR_BUFFER=osg::Camera::COLOR_BUFFER,
      DEPTH_BUFFER=osg::Camera::DEPTH_BUFFER
    };
 
    enum TextureFormat
    {
      RGBA=GL_RGBA,
      RGB = GL_RGB,
      DEPTH_COMPONENT= GL_DEPTH_COMPONENT
    };
 
    enum ComputeNearFarMode
    {
      DO_NOT_COMPUTE_NEAR_FAR=osg::Camera::DO_NOT_COMPUTE_NEAR_FAR,
      COMPUTE_NEAR_FAR_USING_BOUNDING_VOLUMES=osg::Camera::COMPUTE_NEAR_FAR_USING_BOUNDING_VOLUMES,
      COMPUTE_NEAR_FAR_USING_PRIMITIVES=osg::Camera::COMPUTE_NEAR_FAR_USING_PRIMITIVES,
      COMPUTE_NEAR_USING_PRIMITIVES=osg::Camera::COMPUTE_NEAR_USING_PRIMITIVES
    };
 
    RenderTarget(agx::UInt width, agx::UInt height);
 
    void setReferenceCamera(const osg::Camera* referenceCamera);
 
    void setImageCapture(agxOSG::ImageCaptureBase *imageCapture);
 
    agxOSG::ImageCaptureBase* getImageCapture();
 
    void setSize(agx::UInt width, agx::UInt height);
 
    void setSize(agx::Vec2u size);
 
    agx::Vec2u getSize() const;
 
    osg::Camera* getCamera();
 
    void addPreRenderCallback(osg::Camera::DrawCallback* callback);
 
    void setViewMatrixAsLookAt(const agx::Vec3& eye, const agx::Vec3& center, const agx::Vec3& up);
  
    void setViewMatrixFromOtherCamera(const osg::Camera *camera);
 
    void setProjectionMatrixAsPerspective(double fovy, double aspectRatio, double zNear, double zFar);
  
    void setProjectionMatrixFromOtherCamera(const osg::Camera *camera);
 
    void setProjectionMatrixAsOrtho(double left, double right, double bottom, double top, double zNear, double zFar);
 
    void setComputeNearFarMode(agxOSG::RenderTarget::ComputeNearFarMode mode);
 
    agx::Vec2 calculateScreenCoords(agx::Vec3& worldPos);
 
    void setCameraCullMask(int cullMask);
 
    int getCameraCullMask() const;
 
 
  protected:
    virtual ~RenderTarget();
 
  private:
    class CameraSynchronizeCallback;
 
  protected:
    agx::UInt m_width;
    agx::UInt m_height;
    ImageCaptureBaseRef                     m_imageCapture;
    osg::ref_ptr<osg::Camera>               m_camera;
    osg::ref_ptr<CameraSynchronizeCallback> m_cameraSynchronizeCallback;
  };
 
 
  DOXYGEN_START_INTERNAL_BLOCK()
  class RenderTarget::CameraSynchronizeCallback : public osg::Camera::DrawCallback
  {
  public:
    CameraSynchronizeCallback(const osg::Camera *reference, osg::Camera *target);
    virtual ~CameraSynchronizeCallback();
 
    virtual void operator () (osg::RenderInfo& /* renderInfo */) const;
    using osg::Camera::DrawCallback::operator();
 
    void addNestedCallback(osg::Camera::DrawCallback *child);
 
  private:
    osg::ref_ptr<const osg::Camera> m_reference;
    osg::ref_ptr<osg::Camera>       m_target;
    agx::Vector< osg::ref_ptr<osg::Camera::DrawCallback> > m_children;
  };
  DOXYGEN_END_INTERNAL_BLOCK()
}