vtkOpenGLImageSliceMapper.h

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

#include "vtkImageSliceMapper.h"
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkWrappingHints.h"          // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
// Forward declarations
class vtkActor;
class vtkHardwareSelector;
class vtkOpenGLHelper;
class vtkOverrideAttribute;
class vtkRenderWindow;

class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO vtkOpenGLImageSliceMapper
  : public vtkImageSliceMapper
{
public:
  static vtkOpenGLImageSliceMapper* New();
  VTK_NEWINSTANCE
  static vtkOverrideAttribute* CreateOverrideAttributes();
  vtkTypeMacro(vtkOpenGLImageSliceMapper, vtkImageSliceMapper);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void Render(vtkRenderer* ren, vtkImageSlice* prop) override;

  void ReleaseGraphicsResources(vtkWindow*) override;

protected:
  vtkOpenGLImageSliceMapper();
  ~vtkOpenGLImageSliceMapper() override;

  void RecursiveRenderTexturedPolygon(vtkRenderer* ren, vtkImageProperty* property,
    vtkImageData* image, int extent[6], bool recursive);

  void RenderTexturedPolygon(vtkRenderer* ren, vtkImageProperty* property, vtkImageData* image,
    int extent[6], bool recursive);

  void RenderPolygon(vtkActor* actor, vtkPoints* points, const int extent[6], vtkRenderer* ren);

  void RenderBackground(vtkActor* actor, vtkPoints* points, const int extent[6], vtkRenderer* ren);

  void RenderForSelection(vtkRenderer* ren, vtkImageSlice* prop, vtkHardwareSelector* selector);

  void ComputeTextureSize(
    const int extent[6], int& xdim, int& ydim, int imageSize[2], int textureSize[2]) override;

  bool TextureSizeOK(const int size[2], vtkRenderer* ren);

  vtkRenderWindow* RenderWindow; // RenderWindow used for previous render
  int TextureSize[2];
  int TextureBytesPerPixel;
  int LastOrientation;
  int LastSliceNumber;

  vtkActor* PolyDataActor;
  vtkActor* BackingPolyDataActor;
  vtkActor* BackgroundPolyDataActor;
  vtkOpenGLHelper* SelectionHelper;

  vtkTimeStamp LoadTime;

private:
  vtkOpenGLImageSliceMapper(const vtkOpenGLImageSliceMapper&) = delete;
  void operator=(const vtkOpenGLImageSliceMapper&) = delete;
};
#define vtkOpenGLImageSliceMapper_OVERRIDE_ATTRIBUTES                                              \
  vtkOpenGLImageSliceMapper::CreateOverrideAttributes()
VTK_ABI_NAMESPACE_END
#endif