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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCompositeZPass.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkCompositeZPass - Merge depth buffers of processes.
// .SECTION Description
// Merge the depth buffers of satellite processes into the root process depth
// buffer. It assumes that all the depth buffers have the same number of bits.
// The depth buffer of the satellite processes are not changed.
//
// This pass requires a OpenGL context that supports texture objects (TO),
// and pixel buffer objects (PBO). If not, it will emit an error message
// and will render its delegate and return.
//
// .SECTION See Also
// vtkRenderPass
#ifndef vtkCompositeZPass_h
#define vtkCompositeZPass_h
#include "vtkRenderingParallelModule.h" // For export macro
#include "vtkRenderPass.h"
class vtkMultiProcessController;
class vtkPixelBufferObject;
class vtkTextureObject;
class vtkOpenGLRenderWindow;
#ifdef VTK_OPENGL2
class vtkOpenGLHelper;
#else
class vtkShaderProgram2;
#endif
class VTKRENDERINGPARALLEL_EXPORT vtkCompositeZPass : public vtkRenderPass
{
public:
static vtkCompositeZPass *New();
vtkTypeMacro(vtkCompositeZPass,vtkRenderPass);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Perform rendering according to a render state \p s.
// \pre s_exists: s!=0
virtual void Render(const vtkRenderState *s);
// Description:
// Release graphics resources and ask components to release their own
// resources.
// \pre w_exists: w!=0
void ReleaseGraphicsResources(vtkWindow *w);
// Description:
// Controller
// If it is NULL, nothing will be rendered and a warning will be emitted.
// Initial value is a NULL pointer.
vtkGetObjectMacro(Controller,vtkMultiProcessController);
virtual void SetController(vtkMultiProcessController *controller);
// Description:
// Is the pass supported by the OpenGL context?
bool IsSupported(vtkOpenGLRenderWindow *context);
protected:
// Description:
// Default constructor. Controller is set to NULL.
vtkCompositeZPass();
// Description:
// Destructor.
virtual ~vtkCompositeZPass();
// Description:
// Create program for texture mapping.
// \pre context_exists: context!=0
// \pre Program_void: this->Program==0
// \post Program_exists: this->Program!=0
void CreateProgram(vtkOpenGLRenderWindow *context);
vtkMultiProcessController *Controller;
vtkPixelBufferObject *PBO;
vtkTextureObject *ZTexture;
#ifdef VTK_OPENGL2
vtkOpenGLHelper *Program;
#else
vtkShaderProgram2 *Program;
#endif
float *RawZBuffer;
size_t RawZBufferSize;
private:
vtkCompositeZPass(const vtkCompositeZPass&); // Not implemented.
void operator=(const vtkCompositeZPass&); // Not implemented.
};
#endif
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