Re: Smooth zoom in Raster Imaginc C++ Class Lib

In order to handle and display a bitmap I am currently using a LBitmapWindow. For zooming I use the LBitmapWindow's built in zoom functions. I noticed that when zoom is enabled the bitmap is not drawn smoothly on the screen as Windows XP's Picture and Fax Viewer or the function CDC::StretchBlt() in combination with CDC::SetStretchBltMode(HALFTONE) does it.

Is there a way to enable smooth zooming in a LBitmapWindow or is there another simple alternative?

Hello Sir,

To enable your application to paint images with smooth
zooming you need to use the LBitmapSettings::SetDisplayMode function to change how images are displayed.

For more information about the flags the above function
uses, please refer to the following topics in LEADTOOLS Class Library help
file:

LBitmapSettings::SetDisplayMode
LBitmapSettings::GetDisplayMode
Flags for the LBitmapSettings::SetDisplayMode Function.

However, some of theses flags (such as Scale to Gray for B/W
images) only work with LEADTOOLS Document and Medical imaging toolkits. If you
only have Raster Imaging Pro, you can convert the image to 8-bit grayscale and use Resample flag instead.

Regards,