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#1 Posted : Tuesday, April 1, 2008 7:02:12 AM(UTC)

gizmo  
gizmo

Groups: Registered
Posts: 2


Hello,

I'm using Leadtools raster pro v15 with .NET, and my question is quite simple:
How can I keep the png transparency by doing these actions :
_ Load a PNG file (32bits) containing transparency
_ Resize this RasterImage ( Bicubic or whatever )
_ Save the RasterImage as PNG

At the end I would like to get my resized PNG with its transparency keeped.

Thanks in advance.
 

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#2 Posted : Wednesday, April 2, 2008 5:26:32 AM(UTC)

Yasir Alani  
Guest

Groups: Guests
Posts: 3,034

Was thanked: 2 time(s) in 2 post(s)


When an image that contains transparency is saved as PNG, the transparency information is saved automatically.


 


To do that use:


RasterCodecs.Load


ImageProcessing.Size


RasterCodecs.Save
 
#3 Posted : Wednesday, April 2, 2008 6:27:00 AM(UTC)

gizmo  
gizmo

Groups: Registered
Posts: 2


Thanks for your help it works fine.
Here is my code sample for people who wants to have it in details :

RasterCodecs codecs = new RasterCodecs();
RasterImage img = codecs.Load(@"D:\TestImage.png");
SizeCommand command = new SizeCommand();
command.Width = 128;
command.Height = 128;
command.Flags = RasterSizeFlags.Resample;
command.Run(img);
codecs.Save(img, @"D:\TestImageResult.png", RasterImageFormat.Png, 32);

Have fun !
 
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