vtkOpenGLVertexBufferObjectGroup.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkOpenGLVertexBufferObjectGroup_h
#define vtkOpenGLVertexBufferObjectGroup_h

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

VTK_ABI_NAMESPACE_BEGIN
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;


  vtkSetMacro(Instancing, bool);
  vtkGetMacro(Instancing, bool);
  vtkBooleanMacro(Instancing, bool);

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;

  bool Instancing = false;
};

VTK_ABI_NAMESPACE_END
#endif