On Mon, 19 Sep 2016, Reimar Grabowski wrote:

On Fri, 16 Sep 2016 20:31:30 +0200 (CEST)
Michael Van Canneyt <mich...@freepascal.org> wrote:

I would say it is a bug.
Then StretchDraw is bugged, too.
Or it's no bug at all and TCustomCanvas is just missing alpha blending 

I ended up deriving my own canvas class and implementing the desired 
functionality there.

Maybe you can share your code, so we can improve the base class ?

fpc-pascal maillist  -  fpc-pascal@lists.freepascal.org

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