vtkOpenGLVertexBufferObjectGroup.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkOpenGLTexture.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.

=========================================================================*/
#ifndef vtkOpenGLVertexBufferObjectGroup_h
#define vtkOpenGLVertexBufferObjectGroup_h

#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkObject.h"
#include <map> // for methods
#include <vector> // for ivars

class vtkDataArray;
class vtkOpenGLVertexArrayObject;
class vtkOpenGLVertexBufferObject;
class vtkOpenGLVertexBufferObjectCache;
class vtkShaderProgram;
class vtkViewport;
class vtkWindow;

class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLVertexBufferObjectGroup : public vtkObject
{
public:
  static vtkOpenGLVertexBufferObjectGroup *New();
  vtkTypeMacro(vtkOpenGLVertexBufferObjectGroup, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  int GetNumberOfComponents(const char *attribute);

  int GetNumberOfTuples(const char *attribute);

  void ReleaseGraphicsResources(vtkWindow *);

  vtkOpenGLVertexBufferObject *GetVBO(const char *attribute);

  void AddAllAttributesToVAO(
    vtkShaderProgram *program,
    vtkOpenGLVertexArrayObject *vao);

  void RemoveAttribute(const char *attribute);

  void CacheDataArray(const char *attribute, vtkDataArray *da,
    vtkOpenGLVertexBufferObjectCache *cache,
    int destType);
  void CacheDataArray(const char *attribute, vtkDataArray *da,
    vtkViewport *vp,
    int destType);

  bool ArrayExists(const char *attribute, vtkDataArray *da,
    vtkIdType& offset,
    vtkIdType& totalOffset);

  void AppendDataArray(const char *attribute, vtkDataArray *da, int destType);

  void BuildAllVBOs(vtkOpenGLVertexBufferObjectCache *);
  void BuildAllVBOs(vtkViewport *);

  void ClearAllVBOs();

  void ClearAllDataArrays();

  vtkMTimeType GetMTime() override;

protected:
  vtkOpenGLVertexBufferObjectGroup();
  ~vtkOpenGLVertexBufferObjectGroup() override;

  std::map<std::string, vtkOpenGLVertexBufferObject*> UsedVBOs;
  std::map<std::string, std::vector<vtkDataArray*> > UsedDataArrays;
  std::map<std::string, std::map<vtkDataArray*, vtkIdType> > UsedDataArrayMaps;
  std::map<std::string, vtkIdType> UsedDataArraySizes;

private:
  vtkOpenGLVertexBufferObjectGroup(const vtkOpenGLVertexBufferObjectGroup&) = delete;
  void operator=(const vtkOpenGLVertexBufferObjectGroup&) = delete;

};

#endif