Graph to Image

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Rolf[SPAM].Harren - 21 Aug 2003 21:09 GMT

Hello,

can anyone tell me how to convert an Graphics to an Image?
I draw into a Graphic but afterwards I need the Graphic as an Image.
How do I do that?

Thank you, Rolf

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Marco Schmidt - 21 Aug 2003 22:07 GMT

Rolf[SPAM].Harren:

>can anyone tell me how to convert an Graphics to an Image?
>I draw into a Graphic but afterwards I need the Graphic as an Image.
>How do I do that?

Create an Image, call its getGraphics method, draw with the Graphics
object you got that way. Drawing operations will be performed on the
image.

Regards,
Marco

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Kevin Weiner - 21 Aug 2003 23:27 GMT

You can't convert a Graphics object to an Image, but if you are
using Swing, you can redraw your component onto a BufferedImage.
Create a new BufferedImage the same size as your component. Invoke
the BI's createGraphics method to obtain a Graphics context for it.
Then redraw the component on that context using SwingUtilities.paintComponent.

> Hello,
>
> can anyone tell me how to convert an Graphics to an Image?
> I draw into a Graphic but afterwards I need the Graphic as an Image.
> How do I do that?

---------------------------------------------------------------------
Kevin Weiner FM Software 610-997-3930 http://www.fmsware.com

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S. Balk - 22 Aug 2003 08:34 GMT

> can anyone tell me how to convert an Graphics to an Image?
> I draw into a Graphic but afterwards I need the Graphic as an Image.
> How do I do that?

Image is the paper
Graphics is the pencil

You can't say: "I draw something with a pencil, now I want to put it on a
paper"

You have to use the Graphics *of* the Image to draw something. With one
Graphics you can draw on Image. It doesn *not* contain information about
what it painted, just like the pencil has no memory, you only have the paper
to see the result.

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Rolf[SPAM].Harren - 22 Aug 2003 17:25 GMT

I will try to explain my problem in more detail:

I want to create an report, consisting of several barcodes which are
drawn at runtime. The report expects Image- Ojects.

The Images are draw by the draw methode of the Barcode.

To display the Barcode I've got the following methode:

Frame f = new Frame() {
public void paint(Graphics g) {
Barcode b = new Barcode();
b.initEan13("012345678900");
b.draw(g, 72 / 25.4 * 1, 1);
}

Can anyone tell me how to get the barcode into an Image which I can use
for the report?

Please help me, I'm very confused about all this graphics, Image,
bufferedImage stuff...

Thank you, Rolf

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Rolf[SPAM].Harren - 23 Aug 2003 12:05 GMT

Perhaps you can help me with this problem:

I draw the Barcode into the Graphics of an BufferedImage.
Afterwards I convert the BufferedImage into an Image.
Why can't I display this Image??

buffimg = new BufferedImage(200,100,BufferedImage.TYPE_INT_RGB);
graph = buffimg.createGraphics();
b.initEan13("012345678900");
b.draw(graph, 72 / 25.4 * 1, 1);
Image im = Toolkit.getDefaultToolkit().createImage(buffimg.getSource());

Please help me, Rolf

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