OK,
I get it now. If you look at ImageIOImageProcessorjnilib.m
When it applies the watermark it uses a dissolve filter. IMHO, I like
this way better:
CIFilter *dissolveFilter = [CIFilter
filterWithName:@"CISourceOverCompositing"];
[dissolveFilter setValue:watermarkImage forKey:@"inputImage"];
[dissolveFilter setValue:outputImage forKey:@"inputBackgroundImage"];
outputImage = [dissolveFilter valueForKey:@"outputImage"];
This way it uses the CISourceOverCompositing filter and you have
control over how opaque you want to make the watermark when you create
it in the image editor.
Jon
Begin forwarded message:
From: Johnny Miller <[email protected]>
Date: June 17, 2009 1:05:47 PM HST
To: Development WebObjects <[email protected]>
Subject: er.attachment.thumbnail.ImageIOImageProcessor && Watermark
Files
Hi,
Has anyone attempted to use a watermark file in conjunction with
er.attachment.thumbnail.ImageIOImageProcessor?
I'm having some strange results.
I'm passing a PNG with a solid background and text as the watermark -
If the background is black and the text is white - only the text of
the watermark shows up.
If the background is gray and the text is white - the watermark's
background appears white and semi-transparent. The text is normal.
If the background is white and the text is black - the watermark's
background is white and opaque while the text does not appear at all
i.e. you see through to the underlying image.
Also, it would be nice if you could specify where the watermark
appears e.g. left | center | right and top | center | bottom.
Johnny Miller
Kahalawai Media Corp
w: www.kahalawai.com
e: [email protected]
p: 808.661.7962
Johnny Miller
Kahalawai Media Corp
w: www.kahalawai.com
e: [email protected]
p: 808.661.7962
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