Just to clarify the response below - saying "when another thread creates
a new Graphic Context" is a bit of a red herring as each object returned
from BufferedImage.getGraphics() or BufferedImage.createGraphics() is a
brand new object regardless of which thread is calling the method.
Every Graphics object you get from a BufferedImage will have a default
initial foreground color of white and a default background color of
black. You can change this with setColor() and setBackground(), and
those settings will be carried over into cloned graphics objects you get
from the Graphics.create() and Graphics.create(x,y,w,h) methods, but
they will have no effect on the objects returned from the getGraphics()
and createGraphics() methods, regardless of which thread calls them...
...jim
jav...@javadesktop.org wrote:
Hi Karys,
I'm dealing with the same problem.
When doing a bufferdImage.clearRect() , all pixels of the bufImage are set to
the BackgroundColor --white in your case. You can set the backgroundColor using
the Graphic Context of the Image. however, when another thread creates a new
Graphic Context, the backgroundColor will still be white.
I couldn't find any way to set the BackgroundColor of a BufferedImage
permanently.
If you did, please let me know !
Cheers,
Mark
Image image= new BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
Graphics g = image.getGraphics();
if( g instanceof Graphics2D ){
Graphics2D g2d = (Graphics2D) g;
// make sure the background is filled with transparent pixels
when cleared !
g2d.setBackground(new Color(0,0,0,0));
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_IN, 0.0f));
}
[Message sent by forum member 'mark_minnoye' (mark_minnoye)]
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