BmpWriter Class

BMP (Bitmap) is a standard image format mainly used on the Microsoft Windows platform. BMP images can range from black and white (1 bit per pixel) up to 32 bit color (16.7 million colors), in that way bitmap image format can store both indexed and true color images. There are two main BMP formats exist: Windows bitmap formats and OS/2 bitmap format. All of these formats supports RLE-type compression for 4 and 8 bits per pixel palette images.

BMP files can store only single image per file.

You can use BmpWriter class instead of the Save(String, IEncoderOptions) method of the Bitmap. In particular it enables you to save the image asynchronously.

The BmpWriter class usage is demonstrated below:

Dim bitmap As New Aurigma.GraphicsMill.Bitmap("c:\Mountain.jpg")

Dim writer As New Aurigma.GraphicsMill.Codecs.BmpWriter("C:\Mountain.bmp")

Dim frame As New Aurigma.GraphicsMill.Codecs.BmpFrame( _
    Aurigma.GraphicsMill.Codecs.CompressionType.None)

frame.SetBitmap(bitmap)

bitmap.Dispose()

writer.AddFrame(frame)

frame.Dispose()

writer.Dispose()

using (Aurigma.GraphicsMill.Bitmap bitmap = 
           new Aurigma.GraphicsMill.Bitmap(@"c:\Mountain.jpg"))
{
    using (Aurigma.GraphicsMill.Codecs.BmpWriter writer = 
        new Aurigma.GraphicsMill.Codecs.BmpWriter())
    {
        writer.Open(@"C:\Mountain.bmp");

        using (Aurigma.GraphicsMill.Codecs.BmpFrame frame = 
                   new Aurigma.GraphicsMill.Codecs.BmpFrame())
        {
            frame.Compression = Aurigma.GraphicsMill.Codecs.CompressionType.None;
            frame.SetBitmap(bitmap);

            writer.AddFrame(frame);
        }
    }
}

Reference

• BmpWriter Members
• Aurigma.GraphicsMill.Codecs Namespace