`TFPWriterPNG`
pt		InternalWrite
pt		WriteIHDR
pt		WritePLTE
pt		WriteResolutionValues
pt		WritetRNS
pt		WriteIDAT
pt		WriteTexts
pt		WriteIEND
pt		InternalBeginFrames
pt		InternalWriteFrame
pt		InternalEndFrames
pt		CurrentLine
pt		PrevSample
pt		PreviousLine
pt		PrevLinePrevSample
pt		DoFilter
pt		SetChunkLength
pt		SetChunkType
pt		DecideGetPixel
pt		DetermineHeader
pt		DetermineFilter
pt		FillScanLine
pt		ColorDataGrayB
pt		ColorDataColorB
pt		ColorDataGrayW
pt		ColorDataColorW
pt		ColorDataGrayAB
pt		ColorDataColorAB
pt		ColorDataGrayAW
pt		ColorDataColorAW
		create
		destroy
		FrameKinds

`TFPCustomImageWriter`
pt		InternalWrite
pt		InternalBeginFrames
pt		InternalWriteFrame
pt		InternalEndFrames
		ImageWrite
		FrameKinds
		BeginFrames
		WriteNextFrame
		EndFrames

`TFPCustomImageHandler`
pt		Progress
		Create