`TChunkPngPrimaryChromaticities`
		WhiteX
		WhiteY
		RedX
		RedY
		GreenX
		GreenY
		BlueX
		BlueY
		WhiteXAsSingle
		WhiteYAsSingle
		RedXAsSingle
		RedYAsSingle
		GreenXAsSingle
		GreenYAsSingle
		BlueXAsSingle
		BlueYAsSingle

`TCustomChunkPngWithHeader`
	ro	Header

`TCustomChunkPng`

`TDefinedChunk`
pl	ro	FilePosition

`TCustomChunk`
		ChunkName
	ro	ChunkSize
		ChunkFlags

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