vtkWebGPUHardwareSelector.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkWebGPUHardwareSelector_h
#define vtkWebGPUHardwareSelector_h
 
#include "vtkHardwareSelector.h"
 
#include "vtkRenderingWebGPUModule.h" // For export macro
 
VTK_ABI_NAMESPACE_BEGIN
class VTKRENDERINGWEBGPU_EXPORT vtkWebGPUHardwareSelector : public vtkHardwareSelector
{
public:
  static vtkWebGPUHardwareSelector* New();
  vtkTypeMacro(vtkWebGPUHardwareSelector, vtkHardwareSelector);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  bool CaptureBuffers() override;
 
  void BeginRenderProp() override{};
  void EndRenderProp() override{};
 
  void RenderCompositeIndex(unsigned int /*index*/) override{};
 
  void RenderProcessId(unsigned int /*processid*/) override{};
 
  // we need to initialize the depth buffer
  void BeginSelection() override;
  void EndSelection() override;
 
  vtkProp* GetPropFromID(int id) override;
 
  PixelInformation GetPixelInformation(const unsigned int inDisplayPosition[2], int maxDist,
    unsigned int outSelectedPosition[2]) override;
 
protected:
  vtkWebGPUHardwareSelector();
  ~vtkWebGPUHardwareSelector() override;
 
  void PreCapturePass(int /*pass*/) override{};
  void PostCapturePass(int /*pass*/) override{};
 
  void BeginRenderProp(vtkRenderWindow*) override{};
  void EndRenderProp(vtkRenderWindow*) override{};
 
  void SavePixelBuffer(int) override{};
 
  void ReleasePixBuffers() override;
 
  int Convert(int xx, int yy, unsigned char* pb) override;
 
private:
  friend class vtkWebGPURenderWindow;
  struct Ids
  {
    vtkTypeUInt32 AttributeId;
    vtkTypeUInt32 PropId;
    vtkTypeUInt32 CompositeId;
    vtkTypeUInt32 ProcessId;
  };
 
  bool MapReady = false;
  std::vector<Ids> IdBuffer;
 
  vtkProp** PropArray = nullptr;
 
  vtkWebGPUHardwareSelector(const vtkWebGPUHardwareSelector&) = delete;
  void operator=(const vtkWebGPUHardwareSelector&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif