iJpegReader Struct Reference

Inheritance diagram for iJpegReader:

Detailed Description

Jpeg reader interface.

Public Member Functions
virtual tBool	ReadHeaderTables ()=0
	Read the jpeg header tables only. More...
virtual tBool	BeginRead ()=0
	Start reading a jpeg image. More...
virtual tBool	EndRead ()=0
	End reading a jpeg image. More...
virtual tBool	DiscardBuffer ()=0
	Discard existing bytes in the buffer. More...
virtual iFile *	GetFile () const =0
	Get the file from which the data are read. {Property}. More...
virtual tU32	GetWidth () const =0
	Get the width of the current image. More...
virtual tU32	GetHeight () const =0
	Get the height of the current image. More...
virtual tU32	GetNumComponents () const =0
	Get the number of 8bits components. {Property}. More...
virtual eColorSpace	GetColorSpace () const =0
	Get the color space. {Property}. More...
virtual tBool	ReadScanline (iFile *apOut)=0
	Read the next scanline. More...
virtual iBitmap2D *	ReadBitmap (iGraphics *apGraphics)=0
	Read a 2d bitmap from the result of the next begin/end read. More...
Public Member Functions inherited from iUnknown
virtual tBool	IsOK () const =0
	Check if the object is valid. More...
virtual tI32	AddRef ()=0
	Signal that one more reference of the object has been created. More...
virtual tI32	Release ()=0
	Release a reference of the object. More...
virtual void	DeleteThis ()=0
	Bypass any reference counting and delete this object. More...
virtual void	Invalidate ()=0
	Invalidate the object. More...
virtual iUnknown *	QueryInterface (const tUUID &aIID)=0
	Query an interface. More...
virtual void	ListInterfaces (iMutableCollection *apLst, tU32 anFlags) const =0
	Fill a UUID list containing the UUIDs of the implemented interfaces. More...
virtual tI32	SetNumRefs (tI32 anNumRefs)=0
	Set the reference counter directly. More...
virtual tI32	GetNumRefs () const =0
	Get the number of references to this object. More...

Member Function Documentation

virtual tBool ReadHeaderTables ( )

pure virtual

Read the jpeg header tables only.

virtual tBool BeginRead ( )

pure virtual

Start reading a jpeg image.

virtual tBool EndRead ( )

pure virtual

End reading a jpeg image.

virtual tBool DiscardBuffer ( )

pure virtual

Discard existing bytes in the buffer.

virtual iFile* GetFile ( ) const

pure virtual

Get the file from which the data are read. {Property}.

virtual tU32 GetWidth ( ) const

pure virtual

Get the width of the current image.

Remarks

The value will be valid only between Begin/EndRead; {Property}

virtual tU32 GetHeight ( ) const

pure virtual

Get the height of the current image.

Remarks

The value will be valid only between Begin/EndRead; {Property}

virtual tU32 GetNumComponents ( ) const

pure virtual

Get the number of 8bits components. {Property}.

virtual eColorSpace GetColorSpace ( ) const

pure virtual

Get the color space. {Property}.

virtual tBool ReadScanline ( iFile *  apOut )

pure virtual

Read the next scanline.

virtual iBitmap2D* ReadBitmap ( iGraphics *  apGraphics )

pure virtual

Read a 2d bitmap from the result of the next begin/end read.