TwainGetBitDepth Method (GdPictureImaging)

In This Topic

Returns the number of bit per pixel for the current value of PixelType.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function TwainGetBitDepth() As Integer

public int TwainGetBitDepth()

public function TwainGetBitDepth(): Integer;

public function TwainGetBitDepth() : int;

public: int TwainGetBitDepth();

public:
int TwainGetBitDepth();

Return Value

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

Remarks

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.

Reference

GdPictureImaging Class
GdPictureImaging Members
TwainGetState Method
TwainGetLastConditionCode Method
TwainGetLastResultCode Method