When the RasterPaintEngine.Gdi engine is used, the RasterImage.Paint method internally will call the Win32 API functions to paint the image.

When the RasterPaintEngine.GdiPlus engine is used, the RasterImage.Paint method internally will call GDI+ Graphics.DrawImage methods to paint the image. Note that if the RasterImage object is not fully compatible with GDI+, the framework will internally convert the object into a suitable format. This may result in some of the internal image data to be altered.

When the RasterPaintEngine.GdiPlus2 engine is used, the RasterImage.Paint method internally will call GDI+ Graphics.DrawImage methods to paint the image. Note that when using this engine, the RasterImage object data is guaranteed not to be altered or changed in any way.

Using a particular paint engine depends on the RasterImage object and your specific needs:

• RasterPaintEngine.Gdi is generally faster than RasterPaintEngine.GdiPlus or RasterPaintEngine.GdiPlus2
• If the RasterImage object is not GDI+ compatible, and you want to preserve the image state and data when painting, use either RasterPaintEngine.Gdi or RasterPaintEngine.GdiPlus2 (refer to RasterImage.TestGdiPlusCompatible for more information).
• If you need to use GDI+ specific features (for example, if the RasterImage has a transparent color), then use either RasterPaintEngine.GdiPlus or RasterPaintEngine.GdiPlus2.

For more information, refer to The RasterPaintEngine Property and 16bpp Grayscale Images.

System.Object
   System.ValueType
      System.Enum
         Leadtools.RasterPaintEngine

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