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pdf::graph::CPath Class Reference

a class represent a path in a PDF document More...

#include <Path.hh>

Collaboration diagram for pdf::graph::CPath:

[legend]List of all members.

Public Types

• enum EPaintOp {
    stoke, close_stoke, fill_non_zero, fill_even_odd,
    fill_stoke_non_zero, fill_stoke_even_odd, close_fill_stoke_non_zero, close_fill_stoke_even_odd,
    no_op
  }

Public Methods

• CPath (const CState &state=CState(), EPaintOp op=stoke)
• ~CPath ()
• const CState & State () const
• void MoveTo (double x, double y)
• void LineTo (double x, double y)
• void BezierCubic (double x1, double y1, double x2, double y2, double x3, double y3)
• void BezierCubic1 (double x1, double y1, double x3, double y3)
• void BezierCubic2 (double x2, double y2, double x3, double y3)
• void ReturnToStart ()
• void PaintOp (EPaintOp op)
• std::ostream & Write (std::ostream &os, const CState &prev) const

Private Types

• typedef boost::shared_ptr<
  CNode > CNodePtr
• typedef std::vector< CNodePtr > CNodeVec

Private Attributes

• CNodeVec m_nodes
• CState m_state
• EPaintOp m_paint_op

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Detailed Description

a class represent a path in a PDF document

a path is a line with specified properties, e.g. line colour, fill colour. it will contain vertices also.

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Member Enumeration Documentation

enum pdf::graph::CPath::EPaintOp

an enum to specify how to paint the path. Enumeration values: stoke  stroke the path close_stoke  close and stroke the path fill_non_zero  fill the path, using the nonzero winding number rule to determine the region to fill. fill_even_odd  fill the path,using the even-odd rule to determine the region to fill. fill_stoke_non_zero  fill and then stroke the path, using the nonzero winding number rule to determine the region to fill. fill_stoke_even_odd  fill and then stroke the path, using the even-odd rule to determine the region to fill. close_fill_stoke_non_zero  close, fill,and then stroke the path, using the nonzero winding number rule to determine the region to fill. close_fill_stoke_even_odd  close, fill,and then stroke the path, using the even-odd rule to determine the region to fill. no_op  End the path object without lling or stroking it. this operator is a path-painting no-op, used primarily for the side effect of changing the current clipping path { stoke, close_stoke, fill_non_zero, fill_even_odd, fill_stoke_non_zero, fill_stoke_even_odd, close_fill_stoke_non_zero, close_fill_stoke_even_odd, no_op } ;

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Constructor & Destructor Documentation

pdf::graph::CPath::CPath (  const CState &    state = CState( ), EPaintOp    op = stoke )  [explicit]

initialize a path by setting the paint operation and the state of this path. : m_state( state ), m_paint_op( op ) { assert( IsValid( ) ) ; }

pdf::graph::CPath::~CPath (    )

destructor does nothing { assert( IsValid( ) ) ; }

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Member Function Documentation

void pdf::graph::CPath::MoveTo (  double    x, double    y )

begin a new subpath by moving the current point to coordinates (x y), omitting any connecting line segment. { assert( IsValid( ) ) ; m_nodes.push_back( CNodePtr( new CNode2( x, y, "m" ) ) ) ; assert( IsValid( ) ) ; }

void pdf::graph::CPath::LineTo (  double    x, double    y )

append a straight line segment from the current point to the point (x y). the new current point is (x y). { assert( IsValid( ) ) ; m_nodes.push_back( CNodePtr( new CNode2( x, y, "l" ) ) ) ; assert( IsValid( ) ) ; }

void pdf::graph::CPath::BezierCubic (  double    x1, double    y1, double    x2, double    y2, double    x3, double    y3 )

append a cubic Bézier curve to the current path.The curve extends from the current point to the point (x3 ,y3), using (x1 ,y1) and (x2 ,y2) as the Bézier control points. the new current point is (x3, y3). { double array[6] = { x1, y1, x2, y2, x3, y3 } ; m_nodes.push_back( CNodePtr( new CNodes( array, array + 6, "c" ) ) ) ; }

void pdf::graph::CPath::BezierCubic1 (  double    x1, double    y1, double    x3, double    y3 )

append a cubic Bézier curve to the current path.The curve extends from the current point to the point (x3, y3), using (x1, y1) and (x3, y3) as the Bézier control points. the new current point is (x3, y3). { double array[4] = { x1, y1, x3, y3 } ; m_nodes.push_back( CNodePtr( new CNodes( array, array + 4, "y" ) ) ) ; }

void pdf::graph::CPath::ReturnToStart (    )

close the current subpath by appending a straight line segment from the current point to the starting point of the subpath. { assert( IsValid( ) ) ; m_nodes.push_back( CNodePtr( new COperator( "h" ) ) ) ; assert( IsValid( ) ) ; }

void pdf::graph::CPath::PaintOp (  EPaintOp    op )

change the paint operation. { assert( IsValid( ) ) ; m_paint_op = op ; assert( IsValid( ) ) ; }

std::ostream & pdf::graph::CPath::Write (  std::ostream &    os, const CState &    prev )  const

write the path object to a output stream { assert( IsValid( ) ) ; using namespace boost::lambda ; using namespace std ; m_state.Print( os, prev ) ; transform( m_nodes.begin( ), m_nodes.end( ), ostream_iterator<CNode>( os, "\n" ), ret<const CNode&>( *_1 ) ) ; return os << paint_ops[m_paint_op] << '\n' ; }

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Member Data Documentation

CNodeVec pdf::graph::CPath::m_nodes [private]

a vector of nodes, making the path.

CState pdf::graph::CPath::m_state [private]

the graphic state of the path.

EPaintOp pdf::graph::CPath::m_paint_op [private]

the paint operation

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The documentation for this class was generated from the following files:

• Path.hh
• Path.cc

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