>I tried lots of modes, including SRC_OVER. Imagine the following two
>filters: the first is a solid color blue filter; the second is a fog
>filter (graduated, upwards from the bottom). Every other method I
>tried did some combination of showing only one filter or the other
>where they overlapped, or where they did NOT overlap. That is *NOT*
>correct. ADD shows both, where they overlap and where they don't.
Sorry to be persistent... but according to the image in that link I gave
SRC_OVER should show everything - the portion of the source outside of the
overlap, the portion of the destination outside of the overlap, and the
overlap area blended.
Could you perhaps show us a similar set of images for all modes available,
but using your sample filters, so we can see how it differs?
Also, that article mentions a possible bug with hardware acceleration:
Hopefully that is not the cause of your woes?
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to email@example.com
To unsubscribe from this group, send email to
For more options, visit this group at