hi, I am trying to generate a huge (15,000 x 20,000 pixels) offline image
This image is draw into a JComponent object, which contains different parts of
the component, and these parts are put together using swing's pack() method.
After that, the JComponent content is copied to a BufferedImage and then
splitted into several smaller images.
I am quite sure this is not the most efficient way to do this :-) but since I
am working on a 3rd party code, it can take some time to re-write the
components draw() methods.
The obvious problem is memory. Working in a 32-bit environment, I can't address
more than 2GB for the jvm heap, so I am running out of memory easily.
Here goes a snippet. What approach do you guys suggest? Thanks in advance.
public static BufferedImage createImage(JComponent component, Rectangle
region) throws IOException{
boolean opaqueValue = component.isOpaque();
component.setOpaque( true );
logger.debug("image "+region.width+","+region.height);
BufferedImage image = new BufferedImage(region.width,
region.height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = image.createGraphics();
g2d.setClip( region );
component.paint( g2d );
g2d.dispose();
logger.debug("dispose");
component.setOpaque( opaqueValue );
return image;
}
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