Filling a bitmap image with java 1.3.1

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Patrick Baeyens - 08 Dec 2003 10:21 GMT

I need to fill parts of a bitmap, representing European country's
electional cantons, with different colors, one per canton. I would
like to know what would be the best way to do it on a pure java awt
environment.

Thanks a lot.

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VK - 08 Dec 2003 22:52 GMT

Depends on what map do you have in your mind. If a simple schematic map,
I would suggest to spend some initial time to make a polygon for each
canton (a set of x,y coords).
Then use fillPolygon method in Graphics to draw cantons.

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Marco Schmidt - 09 Dec 2003 00:04 GMT

Patrick Baeyens:

>I need to fill parts of a bitmap, representing European country's
>electional cantons, with different colors, one per canton. I would
>like to know what would be the best way to do it on a pure java awt
>environment.

Call getGraphics on your image and use the draw functions of the
Graphics(2D) object you received this way.

Regards,
Marco

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Patrick Baeyens - 09 Dec 2003 08:38 GMT

> Patrick Baeyens:
>
[quoted text clipped - 8 lines]
> Regards,
> Marco

Thanks for the suggestion. This would mean I would first have to
convert my map of the country, which is white with the canton limits
in black, to a polygon map manually and then fill the polygons. Is
there any way I can do a fill operation straight on the bitmap (as in
paintshop-like programs) using java awt or any open source package?

Thanks,
Patrick

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Filling a bitmap image with java 1.3.1

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