public static Image loadFromStream(@NotNull final InputStream inputStream, final int scale) {
if (scale <= 0) throw new IllegalArgumentException("Scale must 1 or more");
try {
BufferExposingByteArrayOutputStream outputStream = new BufferExposingByteArrayOutputStream();
try {
byte[] buffer = new byte[1024];
while (true) {
final int n = inputStream.read(buffer);
if (n < 0) break;
outputStream.write(buffer, 0, n);
}
} finally {
inputStream.close();
}
Image image =
Toolkit.getDefaultToolkit()
.createImage(outputStream.getInternalBuffer(), 0, outputStream.size());
waitForImage(image);
if (UIUtil.isRetina() && scale > 1) {
image = RetinaImage.createFrom(image, scale, ourComponent);
}
return image;
} catch (Exception ex) {
LOG.error(ex);
}
return null;
}
public static Icon scale(@NotNull final Icon source, double _scale) {
final int hiDPIscale;
if (source instanceof ImageIcon) {
Image image = ((ImageIcon) source).getImage();
hiDPIscale =
RetinaImage.isAppleHiDPIScaledImage(image) || image instanceof JBHiDPIScaledImage ? 2 : 1;
} else {
hiDPIscale = 1;
}
final double scale = Math.min(32, Math.max(.1, _scale));
return new Icon() {
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
Graphics2D g2d = (Graphics2D) g.create();
try {
g2d.translate(x, y);
AffineTransform transform = AffineTransform.getScaleInstance(scale, scale);
transform.preConcatenate(g2d.getTransform());
g2d.setTransform(transform);
g2d.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
source.paintIcon(c, g2d, 0, 0);
} finally {
g2d.dispose();
}
}
@Override
public int getIconWidth() {
return (int) (source.getIconWidth() * scale) / hiDPIscale;
}
@Override
public int getIconHeight() {
return (int) (source.getIconHeight() * scale) / hiDPIscale;
}
};
}
