Réponse acceptée !
Salut:
(Solution de twints)
Pour convetir une image vers un objet BufferedImage tu peux faire (solution complexe mais qui gère casi tout):
public BufferedImage createBufferedImage(Image image) {
if(image == null) return null;
if (image instanceof BufferedImage) return (BufferedImage) image;
image = new ImageIcon(image).getImage();
boolean hasAlpha = hasAlpha(image);
BufferedImage bimage = null;
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
try {
int transparency = Transparency.OPAQUE;
if (hasAlpha)
transparency = Transparency.BITMASK;
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
bimage = gc.createCompatibleImage(image.getWidth(null), image.getHeight(null), transparency);
} catch (HeadlessException e) {
// erreur pas d'ecran
}
if (bimage == null) {
int type = BufferedImage.TYPE_INT_RGB;
if (hasAlpha)
type = BufferedImage.TYPE_INT_ARGB;
bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
}
Graphics g = bimage.createGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
return bimage;
}
public boolean hasAlpha(Image image) {
if (image instanceof BufferedImage) {
BufferedImage bimage = (BufferedImage) image;
return bimage.getColorModel().hasAlpha();
}
PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
try {
pg.grabPixels();
} catch (InterruptedException e) { return false;}
ColorModel cm = pg.getColorModel();
return cm.hasAlpha();
}
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