Common WIA Item Property Constants
WIA_IPA_ACCESS_RIGHTS
This flag controls access to the item as well as whether the item is deleted. This property is read only for scanners and read/write for cameras, depending on whether the camera supports changing the access rights
Access Right values:
| Property | Description |
| WIA_ITEM_READ | Item has read-only access |
| WIA_ITEM_WRITE | Item has write-only access |
| WIA_ITEM_CAN_BE_DELETED | Item has delete-only access |
| WIA_ITEM_RD | Item has read and delete access |
| WIA_ITEM_RWD | Item has read, write, and delete access |
WIA_IPA_APP_COLOR_MAPPING
By default, it is the responsibility of the driver to map images from the user-selected profile to SRGB. If an application uses the ICM system to handle color profiles, it sets this property to instruct the driver to stop mapping automatically. The image is then in the color space specified by the WIA_IPA_COLOR_PROFILE property.
WIA_IPA_BITS_PER_CHANNEL
Bits per color channel. 1 for 1 bit per pixel black and white; 8 for 8-bit-per-pixel RGB. This property is read/write for scanners that support different bits-per-pixel settings. Otherwise it is read only.
WIA_IPA_BYTES_PER_LINE
Bytes per line of scan data. Some scanners may pad scan lines with extra bytes to make the scan line a fixed number of DWORDS. This is a read-only property and is set by the device, based on the scan settings.
WIA_IPA_CHANNELS_PER_PIXEL
Number of color channels per pixel. Typical values are 1 for black and white data; 3 for RGB.
WIA_IPA_COLOR_PROFILE
This property specifies the International Color Consortium (ICC) color profile for the images produced by the item.
When the WIA_IPA_APP_COLOR_MAPPING property is set, the current value of this property indicates the color profile for images produced by the WIA item. If the color mapping property is not set, the driver will map images from the current value of this property to sRGB.
This property should not be set by the application or driver. It is managed by WIA based on user input. The valid values setting lists the profiles the user has associated with the device.
WIA_IPA_COMPRESSION
Specifies the compression within the given data format. Useful for data formats like TIFF and DIB that have optional compressed modes.
This property is read/write for devices that support more than one compression type. For all other devices, it is read only.
Compression Types:
| Property | Description |
| WIA_COMPRESSION_NONE | No compression |
| WIA_COMPRESSION_BI_RLE4 | DIB 4 bit run length encoding |
| WIA_COMPRESSION_BI_RLE8 | DIB 8 bit run length encoding |
| WIA_COMPRESSION_G3 | TIFF CCITT G3 |
| WIA_COMPRESSION_G4 | TIFF CCITT G4 |
| WIA_COMPRESSION_JPEG | JPEG encoding |
WIA_IPA_DATATYPE
This property indicates the image type of the item. This property is read-only for cameras and read/write for scanners.
Data Types:
| Property | Description |
| WIA_DATA_THRESHOLD | One bit-per-pixel black-and-white threshold. Data over the current value of WIA_IPS_THRESHOLD is converted to white; data under this value is converted to black |
| WIA_DATA_DITHER | Scan data is dithered using the currently selected dither pattern |
| WIA_DATA_GRAYSCALE | Scan data represents intensity. The palette is a fixed, equally-spaced gray scale with a depth specified by WIA_IPA_DEPTH property |
| WIA_DATA_COLOR | Scan data is red, green, blue (RGB) color. The full color format is described using the following WIA properties: |
| WIA_DATA_COLOR_THRESHOLD | Same as WIA_DATA_COLOR except that the threshold value is used when scanning the data. Color values over the WIA_IPS_THRESHOLD value are converted to full brightness; colors under this value are converted to black |
| WIA_DATA_COLOR_DITHER | Same as WIA_DATA_COLOR except that the data is dithered using the currently selected dither pattern |
WIA_IPA_CHANNELS_PER_PIXEL
WIA_IPA_BITS_PER_CHANNEL
WIA_IPA_PLANAR
WIA_IPA_PIXELS_PER_LINE
WIA_IPA_BYTES_PER_LINE
WIA_IPA_NUMBER_OF_LINES
WIA_IPA_DEPTH
Requested number of bits per pixel. On devices that allow for multiple color-space resolutions per data type, this property is a list of values (a WIA_PROP_LIST) specifying the color-space resolutions. On devices that allow only a single color-space resolution per data type, this is a read-only property that tracks the WIA_IPA_DATATYPE set above, otherwise it is read/write. This property is always read-only for cameras.
WIA_IPA_FILENAME_EXTENSION
This property specifies the preferred filename extension for a particular file format. The driver updates this property to reflect the current value of the WIA_IPA_FORMAT property.
This property is recommended for drivers that support standard formats. However, it is required for drivers that implement custom-defined formats. It is needed to allow the application to determine the correct filename extension to use during file transfer of private formats.
For example, if WIA_IPA_FORMAT is WiaImgFmt_JPEG, then WIA_IPA_FILENAME_EXTENSION should be "jpg", or if WIA_IPA_FORMAT is WiaImgFmt_BMP, then WIA_IPA_FILENAME_EXTENSION should be "bmp". Notice that the file name extension does not include the ".".
WIA_IPA_FORMAT
This property controls the data format returned to the application.
This property is read/write for devices that support more than one format. Otherwise, it is read only.
Format Types:
| Property | Description |
| WiaImgFmt_MEMORYBMP | Windows bitmap without a BITMAPFILEHEADER header |
| WiaImgFmt_BMP | Windows bitmap with a BITMAPFILEHEADER header |
| WiaImgFmt_EMF | Extended Windows metafile |
| WiaImgFmt_WMF | Windows metafile |
| WiaImgFmt_JPEG | JPEG compressed format |
| WiaImgFmt_PNG | W3C PNG format |
| WiaImgFmt_GIF | GIF image format |
| WiaImgFmt_TIFF | Tag Image File Format |
| WiaImgFmt_EXIF | Exchangeable File Format |
| WiaImgFmt_PHOTOCD | Eastman Kodak file format |
| WiaImgFmt_FLASHPIX | FlashPix format |
| WiaImgFmt_ICO | Microsoft icon file format |
| WiaImgFmt_CIFF | Camera Image File format |
| WiaImgFmt_PICT | Apple file format |
| WiaImgFmt_JPEG2K | JPEG 2000 compressed format |
| WiaImgFmt_JPEG2KX | JPEG 2000 compressed format |
| WiaImgFmt_RTF | Rich Text File format |
| WiaImgFmt_XML | XML file |
| WiaImgFmt_TXT | Text file |
| WiaImgFmt_MPG | MPG video format |
| WiaImgFmt_AVI | AVI video format |
| WiaImgFmt_ASF | ASF video format |
| WiaImgFmt_SCRIPT | Script file |
| WiaImgFmt_EXEC | Executable file |
| WiaImgFmt_UNICODE16 | UNICODE 16-bit encoding |
| WiaImgFmt_DPOF | DPOF printing format |
| WiaAudFmt_WAV | WAV audio format |
| WiaAudFmt_MP3 | MP3 audio format |
| WiaAudFmt_AIFF | AIFF audio format |
| WiaAudFmt_WMA | WMA audio format |
| WiaImgFmt_HTML | HTML format |
| WiaImgFmt_RAWRGB | Raw RGB format |
The valid values for this property match the values returned by drvGetWiaFormatInfo based on the setting of WIA_IPA_TYMED. When WIA_IPA_TYMED is set to TYMED_CALLBACK, the valid values for this property include at least IMGFMT_MEMORYBMP. When WIA_IPA_TYMED is set to TYMED_FILE, the valid values for this property include at least IMGFMT_BMP.
When an application uses WiaImgFmt_RAWRGB, the accuracy of the image transfer depends on the following properties:
◼WIA_IPA_DATATYPE
◼WIA_IPA_CHANNELS_PER_PIXEL
◼WIA_IPA_BITS_PER_CHANNEL
◼WIA_IPA_DEPTH
◼WIA_IPA_PIXELS_PER_LINE
◼WIA_IPA_NUMBER_OF_LINES
◼WIA_IPS_XRES
◼WIA_IPS_YRES
For WiaImgFmt_RAWRGB valid values for these properties are the following:
WIA_IPA_DATATYPE - set to WIA_DATA_COLOR
WIA_IPA_DEPTH - set to 24 or higher.
The data transferred for RAWRGB should be uncompressed, in RGB byte order, DWORD aligned, and transferred with no image header.
Supporting the WiaImgFmt_RAWRGB format GUID allows TWAIN applications to transfer images higher than 32 bit using the memory transfer method.
WIA_IPA_FULL_ITEM_NAME
Complete item name, that includes hierarchy. This property is supplied by WIA. The full hierarchy includes the Plug and Play device index followed by the root item name, ROOT, followed by the item name. For example, a picture at the highest level in a camera could be named:
0001\Root\Image0001
WIA_IPA_GAMMA_CURVES
Gamma Correction curves for each color channel. Format is TBD. This property is optional.
WIA_IPA_ICM_PROFILE_NAME
The name of the color management device profile for the scanner.
WIA_IPA_ITEM_FLAGS
Flags that specify the item type and accessibility. This property is supplied by WIA. For information about these flags
WIA_IPA_ITEM_NAME
Name of the item object, for example, "\Image0001". This property is supplied by WIA.
WIA_IPA_ITEM_SIZE
Total data transfer size including data and data-specific header information, if the size is known. If the size is not known, this property must be set to zero.
WIA_IPA_MIN_BUFFER_SIZE
This property is used to specify the minimum buffer size used in data transfers. If the data transfer is done via callback, it may be as small as 64K, but if the transfer is to file, then it is the number of bytes needed to transfer a page of data at a time.
WIA_IPA_NUMBER_OF_LINES
Number of lines in the final image. This is a read-only property and is set by the device, based on the scan settings.
WIA_IPA_PIXELS_PER_LINE
Number of pixels per line in the current image. This is a read-only property and is set by the device based on the scan settings.
WIA_IPA_PLANAR
Describes whether the data is returned in a planar or packed-pixel format.
WIA_IPA_PREFERRED_FORMAT
The preferred data format the driver or device supplies to the application.
Format Types:
| Property | Description |
| WiaImgFmt_MEMORYBMP | Windows bitmap without a header file |
| WiaImgFmt_BMP | Windows bitmap with header file |
| WiaImgFmt_EMF | Extended Windows metafile |
| WiaImgFmt_WMF | Windows metafile |
| WiaImgFmt_JPEG | JPEG compressed format |
| WiaImgFmt_PNG | W3C PNG format |
| WiaImgFmt_GIF | GIF image format |
| WiaImgFmt_TIFF | Tag Image File Format |
| WiaImgFmt_EXIF | Exchangeable File Format |
| WiaImgFmt_PHOTOCD | Eastman Kodak file format |
| WiaImgFmt_FLASHPIX | FlashPix format |
| WiaImgFmt_ICO | Microsoft icon file format |
WIA_IPA_PROP_STREAM_COMPAT_ID
This property specifies a CLSID that represents a set of device property values. If a device driver implements this feature, applications use this property to determine if the device supports a set of values. This property is optional.
WIA_IPA_REGION_TYPE
This property is used to specify the type of region the image analysis has created. This property is optional. The following region types are supported:
| Property | Description |
| WIA_TEXT_ITEM | Region contains text |
| WIA_PHOTO_ITEM | Region contains a photo |
| WIA_DRAWING_ITEM | Region contains a line drawing |
| WIA_LOGO_ITEM | Region contains a logo |
| WIA_HANDWRITING_ITEM | Region contains handwriting |
| WIA_CHART_ITEM | Region contains a chart or graph |
| WIA_TABLE_ITEM | Region contains tabular data |
WIA_IPA_SUPPRESS_PROPERTY_PAGE
Specifies whether to suppress the property pages for items on this device. This property takes one of the following constant values:
| Property | Description |
| WIA_PROPPAGE_CAMERA_ITEM_GENERAL | Suppress the general item property page for a camera |
| WIA_PROPPAGE_SCANNER_ITEM_GENERAL | Suppress the general item property page for a scanner |
WIA_IPA_TYMED
Specifies data transfer type:
| Property | Description |
| WIA_TYMED_CALLBACK | Use callback based data transfer |
| WIA_TYMED_MULTIPAGE_CALLBACK | Use callback based data transfer for multi-page or finished file scans |
| WIA_TYMED_FILE | Use file based data transfer |
| WIA_TYMED_MULTIPAGE_FILE | Use file based data transfer for multi-page or finished file scans |
Scanner WIA Item Property Constants
WIA_IPS_BRIGHTNESS
The image brightness values available within the scanner.
It is up to the scanner driver to supply a range of valid values for this property. Applications query the device for the valid values. Smaller values make the image darker. Larger values make the image brighter. This property is mandatory for all scanners.
WIA_IPS_CONTRAST
The image contrast values available within the scanner. It is up to the scanner driver to supply a range of valid values for this property. Applications query the device for the valid values. Smaller values make the image darker. Larger values make the image brighter. This property is mandatory for all scanners.
WIA_IPS_CUR_INTENT
Allows a driver to preset item properties based on the intended use of the image of an application. To provide an intent, use an intended image type flag and an intended size/quality flag OR'd together. Note that an image cannot be both grayscale and color. This property is mandatory for all scanners.
Intended image type flags:
| Property | Description |
| WIA_INTENT_NONE | Default value. Do not preset any properties |
| WIA_INTENT_IMAGE_TYPE_COLOR | Preset properties for color content |
| WIA_INTENT_IMAGE_TYPE_GRAYSCALE | Preset properties for grayscale content |
| WIA_INTENT_IMAGE_TYPE_TEXT | Preset properties for text content |
| WIA_INTENT_IMAGE_TYPE_MASK | Mask for all of the image type flags |
Intended image size/quality flags:
| Property | Description |
| WIA_INTENT_MINIMIZE_SIZE | Preset properties to minimize image size |
| WIA_INTENT_MAXIMIZE_QUALITY | Preset properties to maximize image quality |
| WIA_INTENT_SIZE_MASK | Mask for all of the size/quality flags |
WIA_IPS_INVERT
Specifies a photo-negative scan. This property is optional.
WIA_IPS_MIRROR
If a scanner supports the detection of document mirroring, this property is implemented with read-only access. If a scanner supports mirroring during scanning, this property is implemented with read/write access. The mirroring flags include the following:
| Property | Description |
| WIA_MIRRORED | The image data is in mirrored orientation, or requests the device to mirror-invert the image |
WIA_IPS_ORIENTATION
If a scanner can support the detection of document orientation, this property is implemented. The orientation flags include the following:
| Property | Description |
| WIA_PORTRAIT | The image data is in portrait orientation(0 degrees rotation) |
| WIA_LANDSCAPE | The image data is in landscape orientation (the page is rotated 90 degrees counter-clockwise) |
| WIA_ROT180 | The image data is in an upside-down orientation (180 degrees rotation) |
| WIA_ROT270 | The image data is in an upside-down landscape orientation (the page is rotated 270 degrees counter-clockwise) |
WIA_IPS_PHOTOMETRIC_INTERP
Photometric interpretation. The default color interpretation of image data.
WIA_PHOTO_WHITE_1 : white is 1, black is 0.
WIA_PHOTO_WHITE_0 : white is 0, black is 1.
For devices or drivers that support selectable photometric interpretation, the access for this property is read/write. For all others, it is read only. This property is mandatory for all scanners.
WIA_IPS_ROTATION
If a scanner supports internal rotation during scanning, this property is implemented. The rotation flags include the following:
| Property | Description |
| WIA_PORTRAIT | The driver or device will not rotate the image (0 degrees counter-clockwise) |
| WIA_LANDSCAPE | The driver or device rotates the image 90 degrees counter-clockwise |
| WIA_ROT180 | The driver or device rotates the image 180 degrees counter-clockwise |
| WIA_ROT270 | The driver or device rotates the image 270 degrees counter-clockwise |
WIA_IPS_THRESHOLD
Specifies the dividing line between black and white. This is the value the scanner uses to threshold, when the WIA_IPA_DATATYPE property is set to WIA_DATA_THRESHOLD. Higher positive values represent lighter pixel values.
The device driver specifies a range of valid values for this property. Applications query the device for the range of valid values. This property is optional.
WIA_IPS_WARM_UP_TIME
Indicates to the application how long, in milliseconds, it takes the scanner and/or lamp to warm up before scanning commences. The application displays a progress indicator to the user based on this value. If the device requires no warm-up, the value should be zero. This property is optional.
WIA_IPS_XEXTENT - Horizontal Extent
The width of the scan in pixels. This property is mandatory for all scanners.
WIA_IPS_XPOS - Horizontal Start Position
The horizontal start position in pixels of the image to be scanned. This property is mandatory for all scanners.
WIA_IPS_XRES - Horizontal Resolution
Specifies the current horizontal (X) axis resolution, in dots per inch (DPI). For scanners that do not support the independent setting of horizontal and vertical resolutions, the vertical resolution tracks the Horizontal Resolution property. To find out if the scanner supports independent resolutions, query the Vertical Resolution property.
The following properties are dependent on the Horizontal Resolution property for the independent resolution case:
◼Horizontal Start Position
◼Horizontal Extent
◼Pixels per Line
◼Bytes Per Line
◼File Size
In addition, the following properties are also reliant in the dependent resolution case:
◼Vertical Start Position
◼Vertical Extent
◼Number of Lines
This property is either a range or a list. This property is mandatory for all scanners.
WIA_IPS_YEXTENT - Vertical Extent
The height of the scan in lines. This property is mandatory for all scanners.
WIA_IPS_YPOS - Vertical Start Position
The vertical start position in pixels of the image to be scanned. This property is mandatory for all scanners.
WIA_IPS_YRES - Vertical Resolution
For scanners that support the independent setting of horizontal and vertical resolution, this property specifies the current vertical (Y) axis resolution, in DPI. It is implemented as read/write. For scanners that do not support independent setting of horizontal and vertical resolutions, this property is implemented as read-only and tracks the WIA_IPS_XRES property. This property is mandatory for all scanners.
The following properties are dependent on the Vertical Resolution property:
◼Vertical Start Position
◼Vertical Extent
◼Number of Lines
◼File Size
Camera WIA Item Property Constants
WIA_IPC_AUDIO_AVAILABLE
The camera item has audio data available.
WIA_IPC_AUDIO_DATA
Camera Audio data.
WIA_IPC_AUDIO_DATA_FORMAT
Audio formats for WIA are TBD.
WIA_IPC_NUM_PICT_PER_ROW
The number of pictures in a horizontal row for this camera.
WIA_IPC_SEQUENCE
Indicates the relative temporal position of this image in a multi-image time sequence. The numbers are not required to be sequential or start at any particular value. The values increase with time.
WIA_IPC_THUMB_HEIGHT
Specifies the height of the thumbnail in pixels.
WIA_IPC_THUMB_WIDTH
Specifies the width of the thumbnail in pixels.
WIA_IPC_THUMBNAIL
The thumbnail data. This is a fixed format consisting of raw, 24 bit, DWORD aligned, Blue-Green-Red color order, DIB bits with no DIB header.
WIA_IPC_TIMEDELAY
Indicates the amount of time, in milliseconds, that transpired between the capture of the current image and the previous image.