vtkOpenGLContextDevice3D.h

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

  Program:   Visualization Toolkit
  Module:    vtkOpenGLContextDevice3D.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 vtkOpenGLContextDevice3D_h
#define vtkOpenGLContextDevice3D_h

#include "vtkRenderingContextOpenGL2Module.h" // For export macro
#include "vtkContextDevice3D.h"
#include "vtkNew.h"             // For ivars.
#include <vector> // STL Header

class vtkBrush;
class vtkOpenGLContextDevice2D;
class vtkOpenGLHelper;
class vtkOpenGLRenderWindow;
class vtkPen;
class vtkRenderer;
class vtkShaderProgram;
class vtkTransform;

class VTKRENDERINGCONTEXTOPENGL2_EXPORT vtkOpenGLContextDevice3D : public vtkContextDevice3D
{
public:
  vtkTypeMacro(vtkOpenGLContextDevice3D, vtkContextDevice3D);
  void PrintSelf(ostream &os, vtkIndent indent) override;

  static vtkOpenGLContextDevice3D * New();

  void DrawPoly(const float *verts, int n, const unsigned char *colors, int nc) override;

  void DrawLines(const float *verts, int n, const unsigned char *colors, int nc) override;

  void DrawPoints(const float *verts, int n,
                  const unsigned char *colors, int nc) override;

  void DrawTriangleMesh(const float *mesh, int n,
                        const unsigned char *colors, int nc) override;

  void ApplyPen(vtkPen *pen) override;

  void ApplyBrush(vtkBrush *brush) override;

  void SetMatrix(vtkMatrix4x4 *m) override;

  void GetMatrix(vtkMatrix4x4 *m) override;

  void MultiplyMatrix(vtkMatrix4x4 *m) override;

  void PushMatrix() override;

  void PopMatrix() override;

  void SetClipping(const vtkRecti &rect) override;

  void EnableClipping(bool enable) override;


  void EnableClippingPlane(int i, double *planeEquation) override;
  void DisableClippingPlane(int i) override;

  void Initialize(vtkRenderer *, vtkOpenGLContextDevice2D *);

  virtual void Begin(vtkViewport* viewport);

protected:
  vtkOpenGLContextDevice3D();
  ~vtkOpenGLContextDevice3D() override;

  virtual void EnableDepthBuffer();

  virtual void DisableDepthBuffer();

  vtkOpenGLHelper *VCBO;  // vertex + color
  void ReadyVCBOProgram();
  vtkOpenGLHelper *VBO;  // vertex
  void ReadyVBOProgram();

  void SetMatrices(vtkShaderProgram *prog);
  void BuildVBO(vtkOpenGLHelper *cbo,
    const float *v, int nv,
    const unsigned char *coolors, int nc,
    float *tcoords);
  void CoreDrawTriangles(std::vector<float> &tverts);

  // do we have wide lines that require special handling
  virtual bool HaveWideLines();

  vtkTransform *ModelMatrix;

  vtkOpenGLRenderWindow* RenderWindow;

  vtkRenderer *Renderer;

  std::vector<bool> ClippingPlaneStates;
  std::vector<double> ClippingPlaneValues;

private:
  vtkOpenGLContextDevice3D(const vtkOpenGLContextDevice3D &) = delete;
  void operator=(const vtkOpenGLContextDevice3D &) = delete;


  class Private;
  Private *Storage;

  // we need a pointer to this because only
  // the 2D device gets a Begin and sets up
  // the ortho matrix
  vtkOpenGLContextDevice2D *Device2D;

  vtkNew<vtkBrush> Brush;
  vtkNew<vtkPen>   Pen;
};

#endif