Hi, i have a proble with rotation of a trasparent backgroud image.

I have an irregular image (ca. 50x40) and i want draw on a graphic context with a .drawImage(), so I load an image 70x70 .png with trasparent back.

Before print image a should rotate of a variable degrees.

// load image
try {
albatros = ImageIO.read(getClass().getResource("Alba.png"));
} catch (IOException ioe) {
} catch (IllegalArgumentException iae) {
albatros = null;

Graphics2D g2a = null;

g2a = (Graphics2D) albatros.getGraphics();
g2a.rotate(-App.item.alfa / 180 * 3.1415, albatros.getWidth() / 2, albatros.getHeight() / 2);
g2a.drawImage(albatros, 0,0,this);

g.drawImage(albatros, (int) App.item.x - albatros.getWidth() / 2, (int) App.item.y - albatros.getHeight() / 2, this);
g.drawLine(x, y, x, y);

At the end of process g2a no have the only the rotate image, but the original orientation of image with print on the new image after rotation.
If I load an image with a orizontal line e make 90 degrees rotation I have a + with yours trasparent background, whit the start image down the new rotate.

If I try whit an image whit a define color backgroud is simply, this paint the old image; but whit trasparent don't work fine.

How can help me?

Sorry for my Enghlis, it's bad how my java!!