Class: TSquareDotHalftone

Declaration: HalftoneDither.h

Taxonomy Categories:

Member Functions:

Interface Category:

API.

Inherits From:

THalftoneDither

Inherited By:

None.

Purpose:

TSquareDotHalftone derives from THalftoneDither and overrides GetSpotFunction to implement a halftone screen where each halftone dot is square in shape.

Instantiation:

Allocate on the heap or the stack.

Deriving Classes:

None.

Concurrency:

Not multithread safe.

Resource Use:

No special requirements.

Member Function: TSquareDotHalftone::TSquareDotHalftone

TSquareDotHalftone ()
TSquareDotHalftone (GCoordinate angle, GCoordinate freq)
TSquareDotHalftone (const TSquareDotHalftone &)

Interface Category:

API.

Purpose:

Default constructor. Initializes frequency and angle to their default values of 72 dots per inch and 45 degrees, respectively.
Creates a new TSquareDotHalftone object and initializes the angle and frequency to the specified values.
Copy constructor.

Calling Context:

Called by the stream-in operators.
Call this function directly.
Called to copy an object.

Parameters:

Takes no parameters.
GCoordinate angle -The initial angle for this halftone object.
GCoordinate freq -The initial frequency for this halftone object.
const TSquareDotHalftone & -The object to be copied.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TSquareDotHalftone::~TSquareDotHalftone

virtual ~ TSquareDotHalftone ()

Interface Category:

API.

Purpose:

Destructor.

Calling Context:

Called to destroy an object.

Parameters:

Takes no parameters.

Return Value:

None.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TSquareDotHalftone::operator=

TSquareDotHalftone & operator =(const TSquareDotHalftone & source)

Interface Category:

API.

Purpose:

Assignment operator.

Calling Context:

Call this function by using the operator in an assignment statement.

Parameters:

const TSquareDotHalftone & source -The object to be copied.

Return Value:

A non-const reference to the left-hand side object.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TSquareDotHalftone::operator>>=

virtual TStream & operator >>=(TStream &) const

Interface Category:

API.

Purpose:

Stream-out operator.

Calling Context:

Called to stream out data.

Parameters:

TStream & -The stream to which the object streams itself out.

Return Value:

Returns a reference to the stream the object streams itself out to.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TSquareDotHalftone::operator<<=

virtual TStream & operator <<= (TStream &)

Interface Category:

API.

Purpose:

Stream-in operator.

Calling Context:

Called to stream in data.

Parameters:

TStream & fromwhere -The stream from which the object streams itself in.

Return Value:

Returns a reference to the stream the object streams itself in from.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

Member Function: TSquareDotHalftone::GetSpotFunction

virtual HalftoneSpotFunc GetSpotFunction () const

Interface Category:

API.

Purpose:

Gets a pointer to the function that implements the spot function. This class overrides THalftoneDither::GetSpotFunction to implement a halftone screen where each halftone dot is square in shape.

Calling Context:

Call this function directly.

Parameters:

Takes no parameters.

Return Value:

Returns a pointer to the spot function.

Exceptions:

Throws no exceptions, passes all exceptions through.

Concurrency:

Not multithread safe.

Other Considerations:

None.

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