vtkOpenGLBatchedPolyDataMapper.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkOpenGLBatchedPolyDataMapper_h
#define vtkOpenGLBatchedPolyDataMapper_h
 
#include "vtkColor.h"                                  // class uses vtkColor
#include "vtkNew.h"                                    // for ivar
#include "vtkOpenGLCompositePolyDataMapperDelegator.h" // for struct BatchElement
#include "vtkRenderingOpenGL2Module.h"                 // for export macro
#include "vtkSmartPointer.h"                           // for arg
#include "vtk_glew.h"                                  // for OpenGL defs
 
// clang-format off
// Must be included after vtk_glew.h for GL_ES_VERSION_3_0
#ifndef GL_ES_VERSION_3_0
#include "vtkOpenGLPolyDataMapper.h"
#define vtkOpenGLPolyDataMapperImplementation vtkOpenGLPolyDataMapper
#else
#include "vtkOpenGLES30PolyDataMapper.h"
#define vtkOpenGLPolyDataMapperImplementation vtkOpenGLES30PolyDataMapper
#endif
// clang-format on
 
#include <cstdint> // for std::uintptr_t
#include <memory>  // for shared_ptr
 
VTK_ABI_NAMESPACE_BEGIN
class vtkCompositePolyDataMapper;
class vtkPolyData;
 
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLBatchedPolyDataMapper
  : public vtkOpenGLPolyDataMapperImplementation
{
public:
  static vtkOpenGLBatchedPolyDataMapper* New();
  vtkTypeMacro(vtkOpenGLBatchedPolyDataMapper, vtkOpenGLPolyDataMapperImplementation);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  using BatchElement = vtkOpenGLCompositePolyDataMapperDelegator::BatchElement;
  using GLBatchElement = vtkOpenGLCompositePolyDataMapperDelegator::GLBatchElement;
  void AddBatchElement(unsigned int flatIndex, BatchElement&& batchElement);
  BatchElement* GetBatchElement(vtkPolyData* polydata);
  void ClearBatchElements();
 
  std::vector<vtkPolyData*> GetRenderedList() const;
  void SetParent(vtkCompositePolyDataMapper* parent);
 
  void RenderPiece(vtkRenderer* renderer, vtkActor* actor) override;
  void UnmarkBatchElements();
  void ClearUnmarkedBatchElements();
 
  void ProcessSelectorPixelBuffers(
    vtkHardwareSelector* sel, std::vector<unsigned int>& pixeloffsets, vtkProp* prop) override;
 
  virtual void ProcessCompositePixelBuffers(vtkHardwareSelector* sel, vtkProp* prop,
    GLBatchElement* glBatchElement, std::vector<unsigned int>& mypixels);
 
protected:
  vtkOpenGLBatchedPolyDataMapper();
  ~vtkOpenGLBatchedPolyDataMapper() override;
 
  void RenderPieceDraw(vtkRenderer* renderer, vtkActor* actor) override;
  void UpdateCameraShiftScale(vtkRenderer* renderer, vtkActor* actoror) override;
 
  void DrawIBO(vtkRenderer* renderer, vtkActor* actoror, int primType, vtkOpenGLHelper& CellBO,
    GLenum mode, int pointSize);
 
  virtual void SetShaderValues(
    vtkShaderProgram* prog, GLBatchElement* glBatchElement, size_t primOffset);
 
  void UpdateShaders(vtkOpenGLHelper& cellBO, vtkRenderer* renderer, vtkActor* actor) override;
 
  void ReplaceShaderColor(
    std::map<vtkShader::Type, vtkShader*> shaders, vtkRenderer* renderer, vtkActor* actor) override;
 
  bool GetNeedToRebuildBufferObjects(vtkRenderer* renderer, vtkActor* actor) override;
 
  void BuildBufferObjects(vtkRenderer* renderer, vtkActor* actor) override;
  virtual void AppendOneBufferObject(vtkRenderer* renderer, vtkActor* actor,
    GLBatchElement* glBatchElement, vtkIdType& vertexOffset, std::vector<unsigned char>& colors,
    std::vector<float>& norms);
 
  void BuildSelectionIBO(
    vtkPolyData* poly, std::vector<unsigned int> (&indices)[4], vtkIdType offset) override;
 
  int CanUseTextureMapForColoring(vtkDataObject*) override;
 
  // Reference to CPDM
  vtkCompositePolyDataMapper* Parent = nullptr;
  // Maps an address of a vtkPolyData to its rendering attributes.
  std::map<std::uintptr_t, std::unique_ptr<GLBatchElement>> VTKPolyDataToGLBatchElement;
  // Index arrays for vert, line, poly, strip, edge, stripedge
  std::vector<unsigned int> IndexArray[PrimitiveEnd];
  // Whether primitive IDs are used
  bool PrimIDUsed;
  // Whether override color is used for a vtkPolyData
  bool OverideColorUsed;
  // Reference to the current selector.
  vtkHardwareSelector* CurrentSelector;
  // used by the hardware selector
  std::vector<std::vector<unsigned int>> PickPixels;
  // cached array map
  std::map<vtkAbstractArray*, vtkDataArray*> ColorArrayMap;
 
private:
  vtkOpenGLBatchedPolyDataMapper(const vtkOpenGLBatchedPolyDataMapper&) = delete;
  void operator=(const vtkOpenGLBatchedPolyDataMapper&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif