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Load(Stream,Int32,CodecsLoadByteOrder,Int32) Method
See Also  Example
Leadtools.Windows.Controls Namespace > RasterImageViewer Class > Load Method : Load(Stream,Int32,CodecsLoadByteOrder,Int32) Method



stream
A Stream containing the the image data to load.
bitsPerPixel

Resulting image pixel depth. Valid values are as follows:

ValueMeaning
0Keep the original file's pixel depth (do not convert the image).
1 to 8The specified bits per pixel in the resulting image.
1212 bits per pixel in the resulting image.
1616 bits per pixel in the resulting image.
2424 bits per pixel in the resulting image.
3232 bits per pixel in the resulting image.
4848 bits per pixel in the resulting image.
6464 bits per pixel in the resulting image.

order

Color order for 16-, 24-, 32-, 48-, and 64-bit images. If the resulting image is less than 16 bits per pixel, this will have no effect since palettized images have no order. Valid values are as follows:

ValueMeaning
CodecsLoadByteOrder.RgbRed, green, and blue color order in memory.
CodecsLoadByteOrder.BgrBlue, green, and red color order in memory.
CodecsLoadByteOrder.Gray12- or 16-bit grayscale image. 12- and 16-bit grayscale images are only supported in the Document/Medical Imaging editions.
CodecsLoadByteOrder.RgbOrGrayLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.BgrOrGrayLoad the image as blue, green, red OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.RommROMM order. ROMM only supports 24- and 48-bit images.
CodecsLoadByteOrder.BgrOrGrayOrRommLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image OR as ROMM. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions only. ROMM only supports 24- and 48-bit color images.

page
1-based index of the page to load.
stream
A Stream containing the the image data to load.
bitsPerPixel

Resulting image pixel depth. Valid values are as follows:

ValueMeaning
0Keep the original file's pixel depth (do not convert the image).
1 to 8The specified bits per pixel in the resulting image.
1212 bits per pixel in the resulting image.
1616 bits per pixel in the resulting image.
2424 bits per pixel in the resulting image.
3232 bits per pixel in the resulting image.
4848 bits per pixel in the resulting image.
6464 bits per pixel in the resulting image.

order

Color order for 16-, 24-, 32-, 48-, and 64-bit images. If the resulting image is less than 16 bits per pixel, this will have no effect since palettized images have no order. Valid values are as follows:

ValueMeaning
CodecsLoadByteOrder.RgbRed, green, and blue color order in memory.
CodecsLoadByteOrder.BgrBlue, green, and red color order in memory.
CodecsLoadByteOrder.Gray12- or 16-bit grayscale image. 12- and 16-bit grayscale images are only supported in the Document/Medical Imaging editions.
CodecsLoadByteOrder.RgbOrGrayLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.BgrOrGrayLoad the image as blue, green, red OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.RommROMM order. ROMM only supports 24- and 48-bit images.
CodecsLoadByteOrder.BgrOrGrayOrRommLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image OR as ROMM. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions only. ROMM only supports 24- and 48-bit color images.

page
1-based index of the page to load.
Loads the specified image stream using specified options.

Syntax

Visual Basic (Declaration) 
Overloads Public Sub Load( _
   ByVal stream As Stream, _
   ByVal bitsPerPixel As Integer, _
   ByVal order As CodecsLoadByteOrder, _
   ByVal page As Integer _
) 
Visual Basic (Usage)Copy Code
Dim instance As RasterImageViewer
Dim stream As Stream
Dim bitsPerPixel As Integer
Dim order As CodecsLoadByteOrder
Dim page As Integer
 
instance.Load(stream, bitsPerPixel, order, page)
C# 
public void Load( 
   Stream stream,
   int bitsPerPixel,
   CodecsLoadByteOrder order,
   int page
)
C++/CLI 
public:
void Load( 
   Stream^ stream,
   int bitsPerPixel,
   CodecsLoadByteOrder order,
   int page
) 

Parameters

stream
A Stream containing the the image data to load.
bitsPerPixel

Resulting image pixel depth. Valid values are as follows:

ValueMeaning
0Keep the original file's pixel depth (do not convert the image).
1 to 8The specified bits per pixel in the resulting image.
1212 bits per pixel in the resulting image.
1616 bits per pixel in the resulting image.
2424 bits per pixel in the resulting image.
3232 bits per pixel in the resulting image.
4848 bits per pixel in the resulting image.
6464 bits per pixel in the resulting image.

order

Color order for 16-, 24-, 32-, 48-, and 64-bit images. If the resulting image is less than 16 bits per pixel, this will have no effect since palettized images have no order. Valid values are as follows:

ValueMeaning
CodecsLoadByteOrder.RgbRed, green, and blue color order in memory.
CodecsLoadByteOrder.BgrBlue, green, and red color order in memory.
CodecsLoadByteOrder.Gray12- or 16-bit grayscale image. 12- and 16-bit grayscale images are only supported in the Document/Medical Imaging editions.
CodecsLoadByteOrder.RgbOrGrayLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.BgrOrGrayLoad the image as blue, green, red OR as a 12- or 16-bit grayscale image. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions
CodecsLoadByteOrder.RommROMM order. ROMM only supports 24- and 48-bit images.
CodecsLoadByteOrder.BgrOrGrayOrRommLoad the image as red, green, blue OR as a 12- or 16-bit grayscale image OR as ROMM. 12- and 16-bit grayscale images are supported in the Document/Medical Imaging editions only. ROMM only supports 24- and 48-bit color images.

page
1-based index of the page to load.

Example

This example will show how to load an image using different bits per pixel and color order. Also, it will show how to load a single page from a multipage file. All loading operations load from a stream rather than from a file on disk.

Visual BasicCopy Code
Public Sub RasterImageViewer_Load1(ByVal viewer As RasterImageViewer)
    Dim multiPageFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Eye.gif"

    Dim fs As FileStream = File.OpenRead(multiPageFileName)

    ' Load the first page
    Dim first As Integer = 1
    viewer.Load(fs, 0, CodecsLoadByteOrder.BgrOrGray, first)
    Console.WriteLine("Loading pages {0}", first)
    viewer.Image.Dispose()

    ' Load the second page
    first = 2
    viewer.Load(fs, 0, CodecsLoadByteOrder.BgrOrGray, first)
    Console.WriteLine("Loading pages {0}", first)
    viewer.Image.Dispose()
End Sub
C#Copy Code
public void RasterImageViewer_Load1(RasterImageViewer viewer) 

    string multiPageFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Eye.gif"; 
 
   FileStream fs = File.OpenRead(multiPageFileName); 
 
   // Load the first page 
   int first = 1; 
   viewer.Load(fs, 0, CodecsLoadByteOrder.BgrOrGray, first); 
   Console.WriteLine("Loading pages {0}", first); 
   viewer.Image.Dispose(); 
 
   // Load the second page 
   first = 2; 
   viewer.Load(fs, 0, CodecsLoadByteOrder.BgrOrGray, first); 
   Console.WriteLine("Loading pages {0}", first); 
   viewer.Image.Dispose(); 
}

Remarks

The file can be in any supported image file format and bits per pixel, whether compressed or uncompressed.

LEADTOOLS will attempt to load corrupted files, so you can see at least a portion of the image.

Support for 12- and 16-bit grayscale images is only available in the Document/Medical Imaging editions.

For supported formats, refer to Summary of All Supported Image File Formats.

LEADTOOLS loads all PDF files as Raster PDF uncompressed RasterImageFormat.RasPdf, regardless of the compression and color space used when saving the file.

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family

See Also