pdftron::PDF::Function Class Reference

#include <Function.h>

Public Types
enum	Type { e_sampled = 0, e_exponential = 2, e_stitching = 3, e_postscript = 4 }

Public Member Functions
	Function (SDF::Obj funct_dict=0)
	Function (const Function &f)
Function &	operator= (const Function &f)
	~Function ()
Type	GetType () const
int	GetInputCardinality ()
int	GetOutputCardinality ()
std::vector< double >	Eval (const std::vector< double > &in_arr)
void	Eval (double *in, double *out)
SDF::Obj	GetSDFObj ()
void	Destroy ()

Detailed Description

Although PDF is not a programming language it provides several types of function object that represent parameterized classes of functions, including mathematical formulas and sampled representations with arbitrary resolution. Functions are used in various ways in PDF, including device-dependent rasterization information for high-quality printing (halftone spot functions and transfer functions), color transform functions for certain color spaces, and specification of colors as a function of position for smooth shadings. Functions in PDF represent static, self-contained numerical transformations.

PDF::Function represents a single, flat interface around all PDF function types.

Definition at line 28 of file Function.h.

Member Enumeration Documentation

enum pdftron::PDF::Function::Type

Enumerator
e_sampled
e_exponential
e_stitching
e_postscript

Definition at line 41 of file Function.h.

Constructor & Destructor Documentation

pdftron::PDF::Function::Function

(

SDF::Obj

funct_dict = 0

)

Create a PDF::Function object from an existing SDF function dictionary. If funct_dict is null, a non valid Function object is created.

pdftron::PDF::Function::Function

(

const Function &

f

)

pdftron::PDF::Function::~Function

(

)

Member Function Documentation

void pdftron::PDF::Function::Destroy

(

)

Frees the native memory of the object.

std::vector<double> pdftron::PDF::Function::Eval

(

const std::vector< double > &

in_arr

)

Evaluate the function at a given point.

Note

that size of 'in' array must be greater than or equal to function input cardinality. and the size of 'out' array must be greater than or equal to function output cardinality.

void pdftron::PDF::Function::Eval	(	double *	in,
		double *	out
	)

int pdftron::PDF::Function::GetInputCardinality

(

)

Returns

the number of input components required by the function

int pdftron::PDF::Function::GetOutputCardinality

(

)

Returns

the number of output components returned by the function

SDF::Obj pdftron::PDF::Function::GetSDFObj

(

)

Returns

the underlying SDF/Cos object

Type pdftron::PDF::Function::GetType

(

)

const

Returns

The function type

Function& pdftron::PDF::Function::operator=

(

const Function &

f

)

---

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

• PDF/Function.h