Public Shared Function ConvertFrom( _
   ByVal srcImage As RasterImage, _
   ByVal flags As RasterImageMediaConverterFromFlags _
) As ImageSource

Visual Basic (Usage)	Copy Code
Dim srcImage As RasterImage Dim flags As RasterImageMediaConverterFromFlags Dim value As ImageSource   value = RasterImageMediaConverter.ConvertFrom(srcImage, flags)

public static ImageSource ConvertFrom( 
   RasterImage srcImage,
   RasterImageMediaConverterFromFlags flags
)

public: static ImageSource ConvertFrom( 
   RasterImage srcImage,
   RasterImageMediaConverterFromFlags flags
) 

public:
static ImageSource ConvertFrom( 
   RasterImage srcImage,
   RasterImageMediaConverterFromFlags flags
) 

Parameters

srcImage

The RasterImage object containing the image data to convert.

flags

Options to control the conversion operation. The following values can be ORed together:

Value	Meaning
RasterImageMediaConverterFromFlags.None	No options
RasterImageMediaConverterFromFlags.KeepAlphaValues	Use srcImage alpha values when converting from and to a pixel format that supports an alpha channel. If this flag is not set, the alpha values in srcImage will be ignored (if present) and an alpha value of all 1's (opaque) will be used instead. If the destination pixel format does not support alpha, this value is ignored.
RasterImageMediaConverterFromFlags.KeepViewPerspective	Do not rotate or flip the destination image if srcImage has a view perspective other than RasterViewPerspective.TopLeft/>. For example, if srcImage has a view perspective of RasterViewPerspective.BottomLeft, the result destination image will be flipped. If this flag is not present, the conversion method will rotate/flip the scanlines as needed.
RasterImageMediaConverterFromFlags.IgnoreLowHighBitsOnGrayImages	Ignore the LowBit and HighBit values if srcImage is a grayscale image with bits per pixel value of 12 or 16. If this flag is not present, the low/high bit values will be used when converting the scanlines of the destination image.

Return Value

LEADTOOLS for .NET and Windows Presentation Foundation support different pixel formats. These pixel formats may not be identical in some cases. The conversion process takes care of converting scanlines to a suitable format that best matches the source data. The following table shows the result pixel format achieved when passing images with different bits/pixel values:

Source Bits/Pixel	Result PixelFormat
1 bits/pixel with black on white palette	BlackWhite
1 bits/pixel with any other palette	Indexed1
2 bits/pixel	Indexed2
3 or 4 bits/pixel	Indexed4
5, 6, 7 or 8 bits/pixel	Indexed8
16 bits/pixel with byte order value of RasterByteOrder.Bgr	Bgr555
16 bits/pixel with byte order value of RasterByteOrder.Gray	Bgra32
12, 24, 32, 48 or 64 bits/pixel	Bgra32

Use the ConvertTo method to convert a WPF ImageSource to LEADTOOLS for .NET RasterImage object.

The conversion works by copying the image data over to the new destination. Currently, there is no support for sharing memory between a RasterImage and an ImageSource.

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference