SCANINFO structure

The SCANINFO structure is used to store and communicate information about a scan acquisition. The WIA Flatbed Driver reads values from the SCANINFO structure, but never writes values. It is the microdriver's responsibility to set values for the SCANINFO members.

Syntax


typedef struct _SCANINFO {
  LONG       ADF;
  LONG       TPA;
  LONG       Endorser;
  LONG       OpticalXResolution;
  LONG       OpticalYResolution;
  LONG       BedWidth;
  LONG       BedHeight;
  RANGEVALUE IntensityRange;
  RANGEVALUE ContrastRange;
  LONG       SupportedCompressionType;
  LONG       SupportedDataTypes;
  LONG       WidthPixels;
  LONG       WidthBytes;
  LONG       Lines;
  LONG       DataType;
  LONG       PixelBits;
  LONG       Intensity;
  LONG       Contrast;
  LONG       Xresolution;
  LONG       Yresolution;
  SCANWINDOW Window;
  LONG       DitherPattern;
  LONG       Negative;
  LONG       Mirror;
  LONG       AutoBack;
  LONG       ColorDitherPattern;
  LONG       ToneMap;
  LONG       Compression;
  LONG       RawDataFormat;
  LONG       RawPixelOrder;
  LONG       bNeedDataAlignment;
  LONG       DelayBetweenRead;
  LONG       MaxBufferSize;
  HANDLE     DeviceIOHandles[MAX_IO_HANDLES];
  LONG       lReserved[MAX_RESERVED];
  VOID       *pMicroDriverContext;
} SCANINFO, *PSCANINFO;

Members

ADF

Indicates whether the scanner supports an automatic document feeder (ADF). This member can be one of the following values:

ValueMeaning

0

The scanner does not support an ADF.

1

The scanner supports an ADF.

2

The scanner supports an ADF with duplex capability.

 

TPA

Indicates whether the scanner supports TPA (TransParency Adapter). The value can be:

0 - not supported

1 - supported

Endorser

Indicates whether the scanner has endorser capabilities. The value can be:

0 - not supported

1 - supported

OpticalXResolution

Specifies the horizontal dpi setting of the scanner optics.

OpticalYResolution

Specifies the vertical dpi setting of the scanner optics.

BedWidth

Specifies the bed width of the scanner in thousandths of an inch.

BedHeight

Specifies the bed height of the scanner in thousandths of an inch.

IntensityRange

Specifies the intensity/brightness range values of the scanner.

ContrastRange

Specifies the contrast range values of the scanner.

SupportedCompressionType

Specifies a mask value of supported compression types. A value of zero indicates that no compression types are supported.

SupportedDataTypes

Specifies a mask value of supported data types. A value of zero indicates that no data types are supported. This member can be the bitwise OR of the following.

ValueMeaning

SUPPORT_BW

The image is 1 bit-per-pixel black and white.

SUPPORT_COLOR

The image is 24 bits-per-pixel color.

SUPPORT_GRAYSCALE

The image is 8 bits-per-pixel grayscale.

 

WidthPixels

Specifies the width of the current image in pixels.

WidthBytes

Specifies the width of the current image in bytes.

Lines

Specifies the height of the current image in pixels.

DataType

Specifies the current data type set of the current image. This member can be set to one of the following.

ValueMeaning

WIA_DATA_COLOR

The driver supports 24 bit-per-pixel color.

WIA_DATA_COLOR_DITHER

This value is not supported in the WIA Flatbed driver.

WIA_DATA_COLOR_THRESHOLD

This value is not supported in the WIA Flatbed driver.

WIA_DATA_DITHER

This value is not supported in the WIA Flatbed driver.

WIA_DATA_GRAYSCALE

The driver supports 8 bit-per-pixel grayscale.

WIA_DATA_THRESHOLD

The driver supports 1 bit-per-pixel black and white.

 

PixelBits

Specifies the current bit depth setting of the current image.

Intensity

Specifies the current intensity/brightness setting of the scanner.

Contrast

Specifies the current contrast setting of the scanner.

Xresolution

Specifies the horizontal dpi setting of the scanner optics.

Yresolution

Specifies the vertical dpi setting of the scanner optics.

Window

Specifies the current scanner window settings.

DitherPattern

Specifies the dither pattern of the scanner.

Negative

Specifies whether negative is on or off. The value can be:

0 - off

1 - on

Mirror

Specifies whether mirror is on or off. The value can be:

0 - off

1 - on

AutoBack

Specifies whether AutoBack is on or off. The value can be:

0 - off

1 - on

ColorDitherPattern

Reserved. Set to zero.

ToneMap

Reserved. Set to zero.

Compression

Specifies whether compression is on or off for the scanner. The value can be:

0 - off

1 - on

RawDataFormat

Specifies the raw data format for the scanner. The value can be:

0 - packed data

1 - planar data

RawPixelOrder

Specifies the pixel order for the scanner. The value can be:

0 - RGB

1 - BGR

bNeedDataAlignment

Specifies whether data alignment is needed for the scanner. The value can be:

0 - false

1 - true

DelayBetweenRead

Specifies the time delay in milliseconds between Scan function calls that the scanner can support.

MaxBufferSize

Specifies the maximum buffer size in the scanner.

DeviceIOHandles

Specifies an array of device I/O handles needed for device communication.

lReserved

Specifies an array of reserved bits.

pMicroDriverContext

Points to the microdriver's context. This member is defined only for Microsoft Windows XP and later. The microdriver allocates the buffer pointed to by this member. The buffer should be allocated in CMD_INITIALIZE, and freed in CMD_UNINITIALIZE. (See Required Commands.) The WIA Flatbed driver knows nothing of this pointer, and hence will not alter the memory pointed to by this member.

Remarks

This structure is used as a parameter in the microdriver's SetPixelWindow, and Scan functions.

Requirements

Version

Available in Windows Me and in Windows XP and later versions of the Windows operating systems.

Header

Wiamicro.h (include Wiamicro.h)

See also

SetPixelWindow
Scan

 

 

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