import java.awt.AlphaComposite;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
public class ImageResize{
/**
* Resize an image
* @param sourceImg The source of the image to resize.
* @param destImg The destination of the resized image.
* @param Width The maximum width you want the new image to be, use 0 for source width.
* @param Height The maximum height you want the new image to be, use 0 for source height.
* @return true if successful and false if unsuccessful.
*/
public static Boolean resizeImage(String sourceImg, String destImg, Integer Width, Integer Height) {
BufferedImage origImage;
try {
origImage = ImageIO.read(new File(sourceImg));
int type = origImage.getType() == 0? BufferedImage.TYPE_INT_ARGB : origImage.getType();
//*Special* if the width or height is 0 use image src dimensions
if (Width == 0) {
Width = origImage.getWidth();
}
if (Height == 0) {
Height = origImage.getHeight();
}
int fHeight = Height;
int fWidth = Width;
//Work out the resized width/height
if (origImage.getHeight() > Height || origImage.getWidth() > Width) {
fHeight = Height;
int wid = Width;
float sum = (float)origImage.getWidth() / (float)origImage.getHeight();
fWidth = Math.round(fHeight * sum);
if (fWidth > wid) {
//rezise again for the width this time
fHeight = Math.round(wid/sum);
fWidth = wid;
}
}
BufferedImage resizedImage = new BufferedImage(fWidth, fHeight, type);
Graphics2D g = resizedImage.createGraphics();
g.setComposite(AlphaComposite.Src);
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.drawImage(origImage, 0, 0, fWidth, fHeight, null);
g.dispose();
ImageIO.write(resizedImage, "png", new File(destImg));
} catch (IOException ex) {
return false;
}
return true;
}
}
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