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TPngEncodeData Class Reference

class TPngEncodeData : public TFrameDataBlock

PNG specific frame data variant which holds PNG encoding information.

It can only be used with the PNG encoder.

Inherits from

TPngEncodeData
- TFrameDataBlock

Public Member Functions
	TPngEncodeData ()

Private Member Functions
TFrameDataBlock *	DuplicateL ( CFrameImageData &)

Inherited Functions
	TFrameDataBlock::DataType()const
	TFrameDataBlock::TFrameDataBlock(TUid)

Public Member Enumerations
enum	TPngCompressLevel { EDefaultCompression = Z_DEFAULT_COMPRESSION, ENoCompression = Z_NO_COMPRESSION, EBestSpeed = Z_BEST_SPEED, EBestCompression = Z_BEST_COMPRESSION }

Public Attributes
TInt	iBitsPerPixel
TBool	iColor
TPngCompressLevel	iLevel
TBool	iPaletted

Constructor & Destructor Documentation

TPngEncodeData()

IMPORT_C

TPngEncodeData

(

)

Default constructor for this class.

Member Functions Documentation

DuplicateL(CFrameImageData &)

TFrameDataBlock *

DuplicateL

(

CFrameImageData &

aFrameImageData

)

const [private, virtual]

Provides a copy of an object that manages a list of frame and image block data, but not a bitwise copy. It provides a new reference to the object.

Parameters

CFrameImageData & aFrameImageData

An object that manages a list of frame and image block data

Member Enumerations Documentation

Enum TPngCompressLevel

A flag reflecting the level of compression used.

Enumerators

EDefaultCompression = Z_DEFAULT_COMPRESSION	Default level of compression used.
ENoCompression = Z_NO_COMPRESSION	No compression used.
EBestSpeed = Z_BEST_SPEED	Optimise compression for speed.
EBestCompression = Z_BEST_COMPRESSION	Optimise compression for size.

Member Data Documentation

TInt iBitsPerPixel

TInt	iBitsPerPixel

The number of bits per pixel.

TBool iColor

TBool

iColor

A flag indicating if the image is color or grayscale.

TPngCompressLevel iLevel

TPngCompressLevel

iLevel

The level of compression to apply.

TBool iPaletted

TBool

iPaletted

A flag indicating use of a palette or RGB.