Deskew

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The Deskew transaction rotates the active raster image by the specified angle, optionally estimating the deskew angle if needed. Deskewing is done to straighten a crooked image. It changes the actual raster data, not just the image display. The result either is placed in a new window or overwrites the original, depending on the overwrite raster flag.

Type XTYP_EXECUTE or XTYP_REQUEST

Syntax [Deskew(docwinID, layerID, angle)]

Parameter	Data type	Values	Meaning
docwinID	DWORD	0 \| docwinID	active \| specific
layerID	DWORD	0	placeholder. The active raster layer is deskewed.
angle	float	between -10.00 and +10.00	specific deskew angle in degrees. See Remarks.
		0	attempt to straighten automatically
Reply	Data type	Meaning
newDocwinID	DWORD	identifier of the window containing the deskewed image. See Remarks.

Remarks

A positive angle skews the image counter-clockwise.

Replies are only returned when this transaction is called as an XTYP_REQUEST. If the overwrite raster flag is set to on, newDocwinID is the original docwinID.

Release information

Added in Release 3.50.