dox/Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkMatplotlibMathTextUtilities.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 __vtkMatplotlibMathTextUtilities_h
#define __vtkMatplotlibMathTextUtilities_h

#include "vtkRenderingMatplotlibModule.h" // For export macro
#include "vtkMathTextUtilities.h"

struct _object;
typedef struct _object PyObject;
class vtkImageData;
class vtkPath;
class vtkPythonInterpreter;
class vtkTextProperty;

class VTKRENDERINGMATPLOTLIB_EXPORT vtkMatplotlibMathTextUtilities :
    public vtkMathTextUtilities
{
public:
  vtkTypeMacro(vtkMatplotlibMathTextUtilities, vtkMathTextUtilities);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkMatplotlibMathTextUtilities *New();


  bool GetBoundingBox(vtkTextProperty *tprop, const char *str,
                      unsigned int dpi, int bbox[4]);


  bool RenderString(const char *str, vtkImageData *data, vtkTextProperty *tprop,
                    unsigned int dpi, int textDims[2] = NULL);

  bool StringToPath(const char *str, vtkPath *path, vtkTextProperty *tprop);


  vtkSetMacro(ScaleToPowerOfTwo, bool);
  vtkGetMacro(ScaleToPowerOfTwo, bool);

protected:
  vtkMatplotlibMathTextUtilities();
  virtual ~vtkMatplotlibMathTextUtilities();

  bool InitializeMaskParser();
  bool InitializePathParser();
  bool InitializeFontPropertiesClass();

  bool CheckForError();
  bool CheckForError(PyObject *object);

  PyObject * GetFontProperties(vtkTextProperty *tprop);

  void CleanupPythonObjects();

  vtkPythonInterpreter* Interpreter;
  PyObject *MaskParser;
  PyObject *PathParser;
  PyObject *FontPropertiesClass;

  // Rotate the 4 2D corner points by the specified angle (degrees) around the
  // origin and calculate the bounding box
  void RotateCorners(double angleDeg, double corners[4][2], double bbox[4]);


  enum Availablity
    {
    NOT_TESTED = 0,
    AVAILABLE,
    UNAVAILABLE
    };

  bool ScaleToPowerOfTwo;
  bool PrepareImageData(vtkImageData *data, int bbox[4]);

  // Function used to check MPL availability and update MPLMathTextAvailable.
  // This will do tests only the first time this method is called.
  static void CheckMPLAvailability();

private:
  vtkMatplotlibMathTextUtilities(const vtkMatplotlibMathTextUtilities&); // Not implemented.
  void operator=(const vtkMatplotlibMathTextUtilities&); // Not implemented.


  static Availablity MPLMathTextAvailable;
};

#endif