GdPicture14 Namespace / GdPictureImaging Class / TwainGetBitDepth Method

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TwainGetBitDepth Method (GdPictureImaging)
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Returns the number of bit per pixel for the current value of PixelType.
Public Function TwainGetBitDepth() As Integer
public int TwainGetBitDepth()
public function TwainGetBitDepth(): Integer; 
public function TwainGetBitDepth() : int;
public: int TwainGetBitDepth(); 
int TwainGetBitDepth(); 

Return Value

If success: bit depth value. Else 0 if fail -> Use TwainGetLastResultCode() and TwainGetLastConditionCode() methods for diagnosing the error.

Before using this method check that the TWAIN state is >= 4 (TWAIN_SOURCE_OPEN)

Ambiguity in the Specification prior to version 2.2 may result in some Data Sources reporting just the depth-per-channel. In the majority of cases a value of 8 for ICAP_BITDEPTH when ICAP_PIXELTYPE is TWPT_RGB may be treated as if the bit depth is really 24.

See Also