Taxonomy Categories:
Member Functions:
Interface Category:
API.
Inherits From:
TDitherHint
Inherited By:
THalftoneDither
TOrderedDither
Purpose:
TMatrixDither implements ordered dithering or halftone dithering through the use of a matrix. The matrix is a flexible, 2-D array whose contents specify the order or the manner in which pixels are highlighted.
Instantiation:
Abstract base class; do not allocate.
Deriving Classes:
Provided classes include TOrderedDither and THalftoneDither.
Concurrency:
Not multithread safe.
Resource Use:
No special requirements.
virtual ~ TMatrixDither ()
Interface Category:
API.
Purpose:
Destructor.
Calling Context:
Called to destroy an object.
Parameters:
Return Value:
None.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
Member Function: TMatrixDither::IsCenterClustered
virtual bool IsCenterClustered () const
Interface Category:
API.
Purpose:
Returns true if the resulting matrix is clustered in the center. High resolution printing devices often work only with center-clustered matrices.
Calling Context:
Call this function directly.
Parameters:
Return Value:
Returns true if the matrix is clustered in the center.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
Member Function: TMatrixDither::CreateDitherMatrix
virtual DitherMatrix * CreateDitherMatrix (GCoordinate horzDPI, GCoordinate vertDPI) const
Interface Category:
API.
Purpose:
Creates the dither matrix specifying the dithering algorithm.
Calling Context:
Call this function directly.
Parameters:
- GCoordinate horzDPI -The horizontal resolution of the device.
- GCoordinate vertDPI -The vertical resolution of the device.
Return Value:
Returns a reference to the resulting dither matrix.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
Member Function: TMatrixDither::operator=
TMatrixDither & operator =(const TMatrixDither & source)
Interface Category:
API.
Purpose:
Assignment operator.
Calling Context:
Called when an object is assigned to another compatible object.
Parameters:
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: TMatrixDither::operator>>=
virtual TStream & operator >>=(TStream & towhere) const
Interface Category:
API.
Purpose:
Stream-out operator.
Calling Context:
Called to stream out data.
Parameters:
- TStream & towhere -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: TMatrixDither::operator<<=
virtual TStream & operator <<= (TStream & fromwhere)
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.
- TMatrixDither (bool primary =true)
- TMatrixDither (const TMatrixDither &)
Interface Category:
API.
Purpose:
- Creates a primary or secondary matrix dither hint.
- Copy constructor.
Calling Context:
- Call to create a primary or secondary matrix dither hint.
- Called to copy an object.
Parameters:
- bool primary =true -The flag indicating whether the new dither hint is primary or secondary. The default value is true.
- const TMatrixDither & -The matrix dither to copy.
Return Value:
None.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
Member Function: TMatrixDither::TemporaryTypeID
virtual EDitherHintClassID TemporaryTypeID () const
Interface Category:
API.
Purpose:
Returns the type identifier for the specific dither hint class. The return value is one of the values from the enum EDitherHintClassID, defined by this class. This is a temporary replacement for the C++ language typeid operator. This function will go away in the future.
Calling Context:
Call this function instead of the C++ language typeid operator.
Parameters:
Return Value:
Returns kMatrixDither.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
Member Function: TMatrixDither::GetBaseTemporaryTypeID
virtual EDitherHintClassID GetBaseTemporaryTypeID () const
Interface Category:
API.
Purpose:
Returns the type identifier for the specific dither hint class. The return value is one of the values from the enum EDitherHintClassID, defined by this class. This is a temporary replacement for the C++ language typeid operator. This function will go away in the future.
Calling Context:
Call this function instead of the C++ language typeid operator.
Parameters:
Return Value:
kMatrixDither.
Exceptions:
Throws no exceptions, passes all exceptions through.
Concurrency:
Not multithread safe.
Other Considerations:
None.
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