Watermarking

dominique · Post by **dominique** » Tue Oct 21, 2008 4:18 pm

Hi GFLSDK programers !

I don't know how to do water marking and if it's difficult to implement.
Should it be possible to add this kind of skill in GFL?

Rgds

Post by **xnview** » Tue Oct 21, 2008 4:31 pm

You have gflBitBlt

dominique · Post by **dominique** » Tue Oct 21, 2008 4:54 pm

Ok, if you told me it's possible using this function, I think I can do what I want as usual

I'll give some news about this.

dominique · Post by **dominique** » Tue Oct 21, 2008 5:12 pm

And what is the difference between gflBitblt and gflBitbltEx ?
Maybe the second one change the alpha channel too ?
I'll search some information about invisible watermarking... if someone knows about this

dominique · Post by **dominique** » Mon Oct 27, 2008 5:28 pm

Ok, I can merge a png with a RGB image using gflBitbltEx.
I try to do the same for greylevel images using gflBitblt and TransparentIndex without success. What is exactly TransparentIndex?
Thx,

Post by **xnview** » Thu Oct 30, 2008 1:50 pm

TransparentIndex is used as transparent index for picture with colormap

dominique · Post by **dominique** » Thu Oct 30, 2008 5:58 pm

Do you have something to do transparency merging with greyscale images?
I wrote something that works fine but I prefer to use gfl functions.

dominique · Post by **dominique** » Tue Nov 04, 2008 1:01 pm

I use gflAddText. I'd like to add transparency to the text.
Is it possible to add this feature using the alpha channel of the text color?
Is there any function to get the text's size given a selected font (gflGetTextRect)?
Rgds

dominique · Post by **dominique** » Wed Nov 26, 2008 7:34 am

Up for next version

XnView Software

Watermarking

Watermarking

Re: Watermarking