[SOLVED] Replacing a color

[AsleyCruz]

Hi coders

I have more than 20 png transparent images (like attached image) and would like to replace/fill
all black color (pixels) to white or another custom color using TBGRABitmap, but I want to keep the transparency.

How can I do this? Hope it can be possible. Thanks.

[cdbc]

Hi
I just use "LazPaint" to do this sort of thing. "LazPaint" is the showpiece of BGRABitmap library, which is available in OPM, great library, can do a bunch of neat stuff...
I guess it's a matter of running over your individual pixels and manipulate color and/or transparency, might even be possible with laz' inhouse TBitmap?!?
Regards Benny

[Handoko]

If you're using TCanvas, in the link below:
https://wiki.freepascal.org/Portal:HowTo_Demos

Goto the Graphics category and find these:
- Get pixel color, there you can learn how to detect transparent pixels
- Change background color, there you can learn how to change color of the pixels
 

[paweld]

BGRABitmap and ReplaceColor

[AsleyCruz]

BGRABitmap and ReplaceColor

Thanks a lot, paweld, worked like a charm.

Thanks @Handoko and @cdbc too