vtkDGRenderResponder.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkDGRenderResponder_h
#define vtkDGRenderResponder_h
 
#include "vtkCellGridRenderRequest.h"
 
#include "vtkCellGridResponder.h"    // For API.
#include "vtkDGCell.h"               // For API.
#include "vtkDrawTexturedElements.h" // For CacheEntry.
#include "vtkInformation.h"          // For CacheEntry.
#include "vtkOpenGLHardwareSelector.h"
#include "vtkRenderingCellGridModule.h" // For Export macro
 
#include <string>
#include <vector>
 
VTK_ABI_NAMESPACE_BEGIN
 
class vtkCellMetadata;
class vtkDGCell;
class vtkDGRenderResponders;
class vtkCellAttributeInformation;
 
class VTKRENDERINGCELLGRID_EXPORT vtkDGRenderResponder
  : public vtkCellGridResponder<vtkCellGridRenderRequest>
{
public:
  static vtkDGRenderResponder* New();
  vtkTypeMacro(vtkDGRenderResponder, vtkCellGridResponder<vtkCellGridRenderRequest>);
 
  bool Query(vtkCellGridRenderRequest* request, vtkCellMetadata* metadata,
    vtkCellGridResponders* caches) override;
 
  void AddMod(const std::string& className);
  void AddMods(const std::vector<std::string>& classNames);
  void RemoveMod(const std::string& className);
  void RemoveAllMods();
 
  void ResetModsToDefault();
 
  enum class ScalarVisualizationOverrideType : int
  {
    NONE,
    R,
    S,
    T,
    L2_NORM_R_S,
    L2_NORM_S_T,
    L2_NORM_T_R,
  };
 
  static void SetScalarVisualizationOverrideType(ScalarVisualizationOverrideType type)
  {
    ScalarVisualizationOverride = type;
  }
 
  static void SetVisualizeTessellation(bool value) { VisualizeTessellation = value; }
 
protected:
  vtkDGRenderResponder();
  ~vtkDGRenderResponder() override = default;
 
  bool DrawCells(vtkCellGridRenderRequest* request, vtkCellMetadata* metadata);
  bool ReleaseResources(vtkCellGridRenderRequest* request, vtkCellMetadata* metadata);
 
  bool DrawShapes(vtkCellGridRenderRequest* request, vtkDGCell* metadata,
    const vtkDGCell::Source& cellSource, int cellTypeIdx, std::size_t specIdx);
  // std::pair<GLenum, std::vector<GLubyte>> ShapeToPrimitiveInfo(int shapeId);
 
  struct CacheEntry
  {
    vtkSmartPointer<vtkDGCell> CellType;
    const vtkDGCell::Source* CellSource;
    vtkSmartPointer<vtkCellAttribute> Shape;
    vtkSmartPointer<vtkCellAttribute> Color;
    vtkNew<vtkInformation> LastRenderPassInfo;
 
    mutable std::unique_ptr<vtkDrawTexturedElements> RenderHelper;
    mutable vtkMTimeType ShapeTime;
    mutable vtkMTimeType ColorTime;
    mutable vtkMTimeType GridTime;
    mutable vtkMTimeType PropertyTime;
    mutable vtkMTimeType MapperTime;
    mutable vtkMTimeType RenderPassStageTime{ 0 };
    mutable bool UsesTessellationShaders;
    mutable bool UsesGeometryShaders;
 
    std::vector<std::string> ModNames;
 
    bool IsUpToDate(vtkRenderer* renderer, vtkActor* actor, vtkMapper* mapper,
      vtkDGRenderResponder* responder) const;
 
    void PrepareHelper(vtkRenderer* renderer, vtkActor* actor, vtkMapper* mapper) const;
 
    bool operator<(const CacheEntry& other) const;
  };
 
  std::set<CacheEntry> Helpers;
  static vtkDrawTexturedElements::ElementShape PrimitiveFromShape(vtkDGCell::Shape shape);
  static vtkDrawTexturedElements::PatchShape PatchPrimitiveFromShape(vtkDGCell::Shape shape);
 
  std::vector<std::string> ModNames;
  std::set<std::string> ModNamesUnique;
  static std::vector<std::string> DefaultModNames;
 
  static ScalarVisualizationOverrideType ScalarVisualizationOverride;
 
  static bool VisualizeTessellation;
 
private:
  vtkDGRenderResponder(const vtkDGRenderResponder&) = delete;
  void operator=(const vtkDGRenderResponder&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif // vtkDGRenderResponder_h
// VTK-HeaderTest-Exclude: vtkDGRenderResponder.h