vtkOpenGLVertexArrayObject.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
 
  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 vtkOpenGLVertexArrayObject_h
#define vtkOpenGLVertexArrayObject_h
 
#include "vtkObject.h"
#include "vtkRenderingOpenGL2Module.h" // for export macro
#include <string>                      // For API.
 
VTK_ABI_NAMESPACE_BEGIN
class vtkShaderProgram;
class vtkOpenGLBufferObject;
class vtkOpenGLVertexBufferObject;
 
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLVertexArrayObject : public vtkObject
{
public:
  static vtkOpenGLVertexArrayObject* New();
  vtkTypeMacro(vtkOpenGLVertexArrayObject, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void Bind();
 
  void Release();
 
  void ReleaseGraphicsResources();
 
  void ShaderProgramChanged();
 
  bool AddAttributeArray(vtkShaderProgram* program, vtkOpenGLBufferObject* buffer,
    const std::string& name, int offset, size_t stride, int elementType, int elementTupleSize,
    bool normalize)
  {
    return this->AddAttributeArrayWithDivisor(
      program, buffer, name, offset, stride, elementType, elementTupleSize, normalize, 0, false);
  }
 
  bool AddAttributeArray(vtkShaderProgram* program, vtkOpenGLVertexBufferObject* buffer,
    const std::string& name, int offset, bool normalize);
 
  bool AddAttributeArrayWithDivisor(vtkShaderProgram* program, vtkOpenGLBufferObject* buffer,
    const std::string& name, int offset, size_t stride, int elementType, int elementTupleSize,
    bool normalize, int divisor, bool isMatrix);
 
  bool AddAttributeMatrixWithDivisor(vtkShaderProgram* program, vtkOpenGLBufferObject* buffer,
    const std::string& name, int offset, size_t stride, int elementType, int elementTupleSize,
    bool normalize, int divisor, int tupleOffset);
 
  bool RemoveAttributeArray(const std::string& name);
 
  // Force this VAO to emulate a vertex array object even if
  // the system supports VAOs. This can be useful in cases where
  // the vertex array object does not handle all extensions.
  void SetForceEmulation(bool val);
 
protected:
  vtkOpenGLVertexArrayObject();
  ~vtkOpenGLVertexArrayObject() override;
 
private:
  vtkOpenGLVertexArrayObject(const vtkOpenGLVertexArrayObject&) = delete;
  void operator=(const vtkOpenGLVertexArrayObject&) = delete;
  class Private;
  Private* Internal;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkOpenGLVertexArrayObject_h