`TFreeTypeGrayscaleMap`
pt		Init
		RenderGlyph
		ScanMoveTo
		ScanNextPixel
		GetPixel
		SetPixel
		XorPixel

`TFreeTypeRasterMap`
pt		GetHeight
pt		GetWidth
pt		GetScanLine
pt		Init
		Create
		Clear
		Fill
		RenderGlyph
		ScanMoveTo
		Destroy

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