drawable.h

下载来的一个看图软件的源代码

// This may look like C code, but it is really -*- C++ -*-
//
// Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002
//
// Definition of Drawable (Graphic objects)
//
// The technique used for instantiating classes which derive from STL
// templates is described in Microsoft MSDN Article ID: Q168958
// "HOWTO: Exporting STL Components Inside & Outside of a Class".
//

#if !defined(Magick_Drawable_header)
#define Magick_Drawable_header

#include "Magick++/Include.h"

#include <functional>
#include <string>
#include <list>
#include <utility>
#include "Magick++/Color.h"
#include "Magick++/Geometry.h"

#if defined(MagickDLLBuild)
#  if defined(MAGICK_DRAWABLE_IMPLEMENTATION)
#    define MagickDrawableExtern
#  else
#   pragma warning( disable: 4231 ) // Disable warning regarding using extern
#    define MagickDrawableExtern extern
#  endif // MAGICK_DRAWABLE_IMPLEMENTATION
#else
#  define MagickDrawableExtern
#endif // MagickDLLBuild

namespace Magick
{

  //
  // Representation of an x,y coordinate
  //
  class MagickDLLDecl Coordinate
  {
  public:
    Coordinate ( void )
      : _x(0),
        _y(0)
      { }
    Coordinate ( double x_, double y_ )
      : _x(x_),
        _y(y_)
      { }
    virtual ~Coordinate ()
      { }

    void   x ( double x_ )
      {
        _x = x_;
      }
    double x ( void ) const
      {
        return _x;
      }

    void   y ( double y_ )
      {
        _y = y_;
      }
    double y ( void ) const
      {
        return _y;
      }

  private:
    double _x;
    double _y;
  };

  typedef std::list<Magick::Coordinate> CoordinateList;

#if defined(MagickDLLBuild)

  MagickDrawableExtern template class MagickDLLDecl
  std::allocator<Magick::Coordinate>;

  MagickDrawableExtern template class MagickDLLDecl
  std::list<Magick::Coordinate, std::allocator<Magick::Coordinate> >;

#endif // MagickDLLBuild

  // Compare two Coordinate objects regardless of LHS/RHS
  MagickDLLDeclExtern int operator == ( const Coordinate& left_,
                                        const Coordinate& right_ );
  MagickDLLDeclExtern int operator != ( const Coordinate& left_,
                                        const Coordinate& right_ );
  MagickDLLDeclExtern int operator >  ( const Coordinate& left_,
                                        const Coordinate& right_ );
  MagickDLLDeclExtern int operator <  ( const Coordinate& left_,
                                        const Coordinate& right_ );
  MagickDLLDeclExtern int operator >= ( const Coordinate& left_,
                                        const Coordinate& right_ );
  MagickDLLDeclExtern int operator <= ( const Coordinate& left_,
                                        const Coordinate& right_ );

  //
  // Base class for all drawable objects
  //
  //struct MagickDLLDecl std::unary_function<MagickLib::DrawContext,void>;
  class MagickDLLDecl DrawableBase:
    public std::unary_function<MagickLib::DrawContext,void>
  {
  public:
    // Constructor
    DrawableBase ( void )
      { }

    // Destructor
    virtual ~DrawableBase ( void );

    // Operator to invoke equivalent draw API call
    virtual void operator()( MagickLib::DrawContext ) const = 0;

    // Return polymorphic copy of object
    virtual DrawableBase* copy() const = 0;

  private:
  };

  //
  // Representation of a drawable surrogate object to manage drawable objects
  //
#undef Drawable  // Conflict with <X11/Xproto.h>
  class MagickDLLDecl Drawable
  {
  public:

    // Constructor
    Drawable ( void );

    // Construct from DrawableBase
    Drawable ( const DrawableBase& original_ );

    // Destructor
    ~Drawable ( void );

    // Copy constructor
    Drawable ( const Drawable& original_ );

    // Assignment operator
    Drawable& operator= (const Drawable& original_ );

    // Operator to invoke contained object
    void operator()( MagickLib::DrawContext context_ ) const;

  private:
    DrawableBase* dp;
  };

  // Compare two Drawable objects regardless of LHS/RHS
  MagickDLLDeclExtern int operator == ( const Drawable& left_,
                                        const Drawable& right_ );
  MagickDLLDeclExtern int operator != ( const Drawable& left_,
                                        const Drawable& right_ );
  MagickDLLDeclExtern int operator >  ( const Drawable& left_,
                                        const Drawable& right_ );
  MagickDLLDeclExtern int operator <  ( const Drawable& left_,
                                        const Drawable& right_ );
  MagickDLLDeclExtern int operator >= ( const Drawable& left_,
                                        const Drawable& right_ );
  MagickDLLDeclExtern int operator <= ( const Drawable& left_,
                                        const Drawable& right_ );

  typedef std::list<Magick::Drawable> DrawableList;

#if defined(MagickDLLBuild)

  MagickDrawableExtern template class MagickDLLDecl
  std::allocator<Magick::Drawable>;

  MagickDrawableExtern template class MagickDLLDecl
  std::list<Magick::Drawable, std::allocator<Magick::Drawable> >;

#endif // MagickDLLBuild

//
// Base class for all drawable path elements for use with
// DrawablePath
//
class MagickDLLDecl VPathBase
{
public:
  // Constructor
  VPathBase ( void )
    { }

  // Destructor
  virtual ~VPathBase ( void );

  // Assignment operator
  //    const VPathBase& operator= (const VPathBase& original_ );

  // Operator to invoke equivalent draw API call
  virtual void operator()( MagickLib::DrawContext context_ ) const = 0;

  // Return polymorphic copy of object
  virtual VPathBase* copy() const = 0;
};

//
// Representation of a drawable path element surrogate object to
// manage drawable path elements so they may be passed as a list to
// DrawablePath.
//
class MagickDLLDecl VPath
{
public:
  // Constructor
  VPath ( void );
    
  // Construct from VPathBase
  VPath ( const VPathBase& original_ );
    
  // Destructor
  virtual ~VPath ( void );

  // Copy constructor
  VPath ( const VPath& original_ );
    
  // Assignment operator
  VPath& operator= (const VPath& original_ );

  // Operator to invoke contained object
  void operator()( MagickLib::DrawContext context_ ) const;

private:
  VPathBase* dp;
};

// Compare two VPath objects regardless of LHS/RHS
MagickDLLDeclExtern int operator == ( const VPath& left_,
                                      const VPath& right_ );
MagickDLLDeclExtern int operator != ( const VPath& left_,
                                      const VPath& right_ );
MagickDLLDeclExtern int operator >  ( const VPath& left_,
                                      const VPath& right_ );
MagickDLLDeclExtern int operator <  ( const VPath& left_,
                                      const VPath& right_ );
MagickDLLDeclExtern int operator >= ( const VPath& left_,
                                      const VPath& right_ );
MagickDLLDeclExtern int operator <= ( const VPath& left_,
                                      const VPath& right_ );

typedef std::list<Magick::VPath> VPathList;

#if defined(MagickDLLBuild)

MagickDrawableExtern template class MagickDLLDecl
std::allocator<Magick::VPath>;

MagickDrawableExtern template class MagickDLLDecl
std::list<Magick::VPath, std::allocator<Magick::VPath> >;

#endif // MagickDLLBuild

//
// Drawable Objects
//

// Affine (scaling, rotation, and translation)
class MagickDLLDecl DrawableAffine  : public DrawableBase
{
public:
  DrawableAffine ( double sx_, double sy_,
                   double rx_, double ry_,
                   double tx_, double ty_ );

  DrawableAffine ( void );

  /*virtual*/ ~DrawableAffine( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/
  DrawableBase* copy() const;
    
  void sx( const double sx_ )
    {
      _affine.sx = sx_;
    }
  double sx( void ) const
    {
      return _affine.sx;
    }

  void sy( const double sy_ )
    {
      _affine.sy = sy_;
    }
  double sy( void ) const
    {
      return _affine.sy;
    }

  void rx( const double rx_ )
    {
      _affine.rx = rx_;
    }
  double rx( void ) const
    {
      return _affine.rx;
    }
  
  void ry( const double ry_ )
    {
      _affine.ry = ry_;
    }
  double ry( void ) const
    {
      return _affine.ry;
    }
  
  void tx( const double tx_ )
    {
      _affine.tx = tx_;
    }
  double tx( void ) const
    {
      return _affine.tx;
    }
  
  void ty( const double ty_ )
    {
      _affine.ty = ty_;
    }
  double ty( void ) const
    {
      return _affine.ty;
    }
  
private:
  MagickLib::AffineMatrix  _affine;
};

// Arc
class MagickDLLDecl DrawableArc : public DrawableBase
{
public:
  DrawableArc ( double startX_, double startY_,
                double endX_, double endY_,
                double startDegrees_, double endDegrees_ )
    : _startX(startX_),
      _startY(startY_),
      _endX(endX_),
      _endY(endY_),
      _startDegrees(startDegrees_),
      _endDegrees(endDegrees_)
    { }

  /*virtual*/ ~DrawableArc( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;

  void startX( double startX_ )
    {
      _startX = startX_;
    }
  double startX( void ) const
    {
      return _startX;
    }
  
  void startY( double startY_ )
    {
      _startY = startY_;
    }
  double startY( void ) const
    {
      return _startY;
    }
  
  void endX( double endX_ )
    {
      _endX = endX_;
    }
  double endX( void ) const
    {
      return _endX;
    }

  void endY( double endY_ )
    {
      _endY = endY_;
    }
  double endY( void ) const
    {
      return _endY;
    }
  
  void startDegrees( double startDegrees_ )
    {
      _startDegrees = startDegrees_;
    }
  double startDegrees( void ) const
    {
      return _startDegrees;
    }

  void endDegrees( double endDegrees_ )
    {
      _endDegrees = endDegrees_;
    }
  double endDegrees( void ) const
    {
      return _endDegrees;
    }
  
private:
  double _startX;
  double _startY;
  double _endX;
  double _endY;
  double _startDegrees;
  double _endDegrees;
};

// Bezier curve (Coordinate list must contain at least three members)
class MagickDLLDecl DrawableBezier : public DrawableBase
{
public:
  // Construct from coordinates
  DrawableBezier ( const CoordinateList &coordinates_ );

  // Copy constructor
  DrawableBezier ( const DrawableBezier& original_ );

  // Destructor
  /*virtual*/ ~DrawableBezier ( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;
  
private:
  CoordinateList _coordinates;
};


// Pop (terminate) clip path definition
class MagickDLLDecl DrawablePopClipPath : public DrawableBase
{
public:
  DrawablePopClipPath ( void )
    : _dummy(0)
    {
    }

  /*virtual*/ ~DrawablePopClipPath ( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;

private:
  int   _dummy;
};

// Push (create) Clip path definition
class MagickDLLDecl DrawablePushClipPath : public DrawableBase
{
public:
  DrawablePushClipPath ( const std::string &id_);

  DrawablePushClipPath ( const DrawablePushClipPath& original_ );

  /*virtual*/ ~DrawablePushClipPath ( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;

private:
  std::string _id;
};

// Named Clip Path
class MagickDLLDecl DrawableClipPath : public DrawableBase
{
public:
  DrawableClipPath ( const std::string &id_ );
  DrawableClipPath ( const DrawableClipPath& original_ );

  /*virtual*/ ~DrawableClipPath ( void );

  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;

  void clip_path( const std::string &id_ )
    {
      _id = id_.c_str(); //multithread safe
    }
  std::string clip_path( void ) const
    {
      return _id;
    }

private:
  std::string   _id;
};

// Circle
class MagickDLLDecl DrawableCircle : public DrawableBase
{
public:
  DrawableCircle ( double originX_, double originY_,
                   double perimX_, double perimY_ )
    : _originX(originX_),
      _originY(originY_),
      _perimX(perimX_),
      _perimY(perimY_)
    {
    }

  /*virtual*/ ~DrawableCircle ( void );
    
  // Operator to invoke equivalent draw API call
  /*virtual*/ void operator()( MagickLib::DrawContext context_ ) const;

  // Return polymorphic copy of object
  /*virtual*/ DrawableBase* copy() const;

  void originX( double originX_ )
    {
      _originX = originX_;
    }
  double originX( void ) const
    {
      return _originX;
    }

  void originY( double originY_ )
    {
      _originY = originY_;
    }
  double originY( void ) const
    {
      return _originY;
    }

  void perimX( double perimX_ )
    {
      _perimX = perimX_;
    }
  double perimX( void ) const
    {
      return _perimX;
    }

  void perimY( double perimY_ )
    {
      _perimY = perimY_;
    }
  double perimY( void ) const
    {
      return _perimY;
    }