Actionscript 3 :: Limiting Custom BlendMode Made With PixelBender - How To Merge Images
Oct 7, 2010
i need to mix two images one photo and a placeholder. The idea is that we see the placeholder except where the palceholder has a particular color, in that case the user sees the photo. Something like chroma key.For this purpose i wrote a Pixel Bender shader that acts as a BlendMode. If the background is in the right color output the pixel image otherwhise output the pixel from the placeholder.
<languageVersion : 1.0;>
kernel Crossfade
< namespace : "mynamesp";
vendor : "Artbits snc";
[code]....
Everything works fine except for the fact that i had multiple placeholder, one over the other and my shader don't check the color of its own placeholder but the color of everything under the photo.Is there a way to force BlendMode to consider only a layer or a specific background color ?Is there a smarter way to obtain the same result ?
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