vtkOpenGLContextDevice2D.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkOpenGLContextDevice2D.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 vtkOpenGLContextDevice2D_h
#define vtkOpenGLContextDevice2D_h
 
#include "vtkContextDevice2D.h"
#include "vtkRenderingContextOpenGL2Module.h" // For export macro
 
#include <list>   // for std::list
#include <vector> // STL Header
 
class vtkMatrix4x4;
class vtkOpenGLExtensionManager;
class vtkOpenGLHelper;
class vtkOpenGLRenderWindow;
class vtkPath;
class vtkRenderer;
class vtkShaderProgram;
class vtkStringToImage;
class vtkTransform;
class vtkViewport;
class vtkWindow;
 
class VTKRENDERINGCONTEXTOPENGL2_EXPORT vtkOpenGLContextDevice2D : public vtkContextDevice2D
{
public:
  vtkTypeMacro(vtkOpenGLContextDevice2D, vtkContextDevice2D);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  static vtkOpenGLContextDevice2D* New();
 
  void DrawPoly(float* f, int n, unsigned char* colors = nullptr, int nc_comps = 0) override;
 
  void DrawLines(float* f, int n, unsigned char* colors = nullptr, int nc_comps = 0) override;
 
  void DrawPoints(float* points, int n, unsigned char* colors = nullptr, int nc_comps = 0) override;
 
  void DrawPointSprites(vtkImageData* sprite, float* points, int n, unsigned char* colors = nullptr,
    int nc_comps = 0) override;
 
  void DrawMarkers(int shape, bool highlight, float* points, int n, unsigned char* colors = nullptr,
    int nc_comps = 0) override;
 
 
  vtkSetMacro(MaximumMarkerCacheSize, int);
  vtkGetMacro(MaximumMarkerCacheSize, int);
 
  void DrawQuad(float* points, int n) override;
 
  void DrawQuadStrip(float* points, int n) override;
 
  void DrawPolygon(float*, int) override;
  void DrawColoredPolygon(
    float* points, int numPoints, unsigned char* colors = nullptr, int nc_comps = 0) override;
 
  void DrawEllipseWedge(float x, float y, float outRx, float outRy, float inRx, float inRy,
    float startAngle, float stopAngle) override;
 
  void DrawEllipticArc(
    float x, float y, float rX, float rY, float startAngle, float stopAngle) override;
 
  void DrawString(float* point, const vtkStdString& string) override;
 
  void ComputeStringBounds(const vtkStdString& string, float bounds[4]) override;
 
  void DrawString(float* point, const vtkUnicodeString& string) override;
 
  void ComputeStringBounds(const vtkUnicodeString& string, float bounds[4]) override;
 
  void ComputeJustifiedStringBounds(const char* string, float bounds[4]) override;
 
  void DrawMathTextString(float point[2], const vtkStdString& string) override;
 
  void DrawImage(float p[2], float scale, vtkImageData* image) override;
 
  void DrawImage(const vtkRectf& pos, vtkImageData* image) override;
 
  void DrawPolyData(float p[2], float scale, vtkPolyData* polyData, vtkUnsignedCharArray* colors,
    int scalarMode) override;
 
  void SetColor4(unsigned char color[4]) override;
 
  virtual void SetColor(unsigned char color[3]);
 
  void SetTexture(vtkImageData* image, int properties = 0) override;
 
  void SetPointSize(float size) override;
 
  void SetLineWidth(float width) override;
 
  void SetLineType(int type) override;
 
  void MultiplyMatrix(vtkMatrix3x3* m) override;
 
  void SetMatrix(vtkMatrix3x3* m) override;
 
  void GetMatrix(vtkMatrix3x3* m) override;
 
  void PushMatrix() override;
 
  void PopMatrix() override;
 
  /*
   * Supply an int array of length 4 with x1, y1, width, height specifying
   * clipping region for the device in pixels.
   */
  void SetClipping(int* x) override;
 
  void EnableClipping(bool enable) override;
 
  void Begin(vtkViewport* viewport) override;
 
  void End() override;
 
  void BufferIdModeBegin(vtkAbstractContextBufferId* bufferId) override;
 
  void BufferIdModeEnd() override;
 
  bool SetStringRendererToFreeType();
 
  bool SetStringRendererToQt();
 
  bool HasGLSL();
 
 
  vtkGetObjectMacro(RenderWindow, vtkOpenGLRenderWindow);
 
  virtual void ReleaseGraphicsResources(vtkWindow* window);
 
 
  vtkMatrix4x4* GetProjectionMatrix();
  vtkMatrix4x4* GetModelMatrix();
 
protected:
  vtkOpenGLContextDevice2D();
  ~vtkOpenGLContextDevice2D() override;
 
  int GetNumberOfArcIterations(float rX, float rY, float startAngle, float stopAngle);
 
  vtkRenderer* Renderer;
 
  bool InRender;
 
 
  class Private;
  Private* Storage;
 
  class CellArrayHelper;
  CellArrayHelper* PolyDataImpl;
 
  vtkOpenGLRenderWindow* RenderWindow;
 
  vtkOpenGLHelper* LinesCBO; // vertex + color
  void ReadyLinesCBOProgram();
  vtkOpenGLHelper* LinesBO; // vertex
  void ReadyLinesBOProgram();
  vtkOpenGLHelper* VCBO; // vertex + color
  void ReadyVCBOProgram();
  vtkOpenGLHelper* VBO; // vertex
  void ReadyVBOProgram();
  vtkOpenGLHelper* VTBO; // vertex + tcoord
  void ReadyVTBOProgram();
  vtkOpenGLHelper* SCBO; // sprite + color
  void ReadySCBOProgram();
  vtkOpenGLHelper* SBO; // sprite
  void ReadySBOProgram();
 
  void SetMatrices(vtkShaderProgram* prog);
  void BuildVBO(
    vtkOpenGLHelper* cbo, float* v, int nv, unsigned char* coolors, int nc, float* tcoords);
  void CoreDrawTriangles(
    std::vector<float>& tverts, unsigned char* colors = nullptr, int numComp = 0);
  // used for stipples
  unsigned short LinePattern;
 
 
  void DrawMarkersGL2PS(
    int shape, bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
  void DrawCrossMarkersGL2PS(
    bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
  void DrawPlusMarkersGL2PS(
    bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
  void DrawSquareMarkersGL2PS(
    bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
  void DrawCircleMarkersGL2PS(
    bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
  void DrawDiamondMarkersGL2PS(
    bool highlight, float* points, int n, unsigned char* colors, int nc_comps);
 
 
  void DrawImageGL2PS(float p[2], vtkImageData* image);
  void DrawImageGL2PS(float p[2], float scale, vtkImageData* image);
  void DrawImageGL2PS(const vtkRectf& rect, vtkImageData* image);
 
 
  void DrawCircleGL2PS(float x, float y, float rX, float rY);
  void DrawWedgeGL2PS(float x, float y, float outRx, float outRy, float inRx, float inRy);
 
  void AddEllipseToPath(vtkPath* path, float x, float y, float rx, float ry, bool reverse);
 
  void TransformPath(vtkPath* path) const;
 
  void TransformPoint(float& x, float& y) const;
 
  void TransformSize(float& dx, float& dy) const;
 
private:
  vtkOpenGLContextDevice2D(const vtkOpenGLContextDevice2D&) = delete;
  void operator=(const vtkOpenGLContextDevice2D&) = delete;
 
  vtkImageData* GetMarker(int shape, int size, bool highlight);
 
  class vtkMarkerCacheObject
  {
  public:
    vtkTypeUInt64 Key;
    vtkImageData* Value;
    bool operator==(vtkTypeUInt64 key) { return this->Key == key; }
  };
 
  void ComputeStringBoundsInternal(const vtkUnicodeString& string, float bounds[4]);
 
  vtkTransform* ProjectionMatrix;
  vtkTransform* ModelMatrix;
 
  std::list<vtkMarkerCacheObject> MarkerCache;
  int MaximumMarkerCacheSize;
 
  vtkImageData* GenerateMarker(int shape, int size, bool highlight);
};
 
#endif // vtkOpenGLContextDevice2D_h