Android Floodfill
lazarus / 39-Graphics

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GreatDayDan · 2019-07-10 15:27

Does Lazarus/FPC on Android have a graphics floodfill method?

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jmpessoa · 2019-07-10 19:24

LAMW? No.

But, we can try implement it based on:

https://stackoverflow.com/questions/16968412/how-to-use-flood-fill-
algorithm-in-android

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winni · 2019-07-10 20:04

You can find a very good pascal floodfill in BGRAbitmap Package; there
in the unit BGRADefaultBitmap.  It is called
procedure TBGRADefaultBitmap.ParallelFloodFill
and avoids recursion with the related problems.
Look at line 4507 ff

Winni

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GreatDayDan · 2019-07-11 19:30

Thanks for the tip.   Now all I have to do is learn how to use it. My
goal is to run the app on my wife's tablet.

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circular · 2019-07-11 19:58

By the way, the basic method is FloodFill.

ParallelFloodFill fills another bitmap according to the first one.
This is useful for example if you want to make a mask of an area while
leaving the original image unchanged.

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GreatDayDan · 2019-07-11 20:00

Coolness.