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import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.Transparency;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.DataBufferInt;
import java.awt.image.SampleModel;
import java.awt.image.SinglePixelPackedSampleModel;
import java.awt.image.WritableRaster;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
public class GraphicsUtil {
private static GraphicsConfiguration configuration = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
private GraphicsUtil() {
}
public static BufferedImage createCompatibleImage(int width, int height) {
return configuration.createCompatibleImage(width, height);
}
public static BufferedImage createTranslucentCompatibleImage(int width, int height) {
return configuration.createCompatibleImage(width, height, Transparency.TRANSLUCENT);
}
public static BufferedImage loadCompatibleImage(URL resource) throws IOException {
BufferedImage image = ImageIO.read(resource);
return toCompatibleImage(image);
}
public static BufferedImage toCompatibleImage(BufferedImage image) {
BufferedImage compatibleImage = configuration.createCompatibleImage(image.getWidth(),
image.getHeight(), Transparency.TRANSLUCENT);
Graphics g = compatibleImage.getGraphics();
g.drawImage(image, 0, 0, null);
g.dispose();
return compatibleImage;
}
public static BufferedImage createThumbnail(BufferedImage image, int requestedThumbSize) {
float ratio = (float) image.getWidth() / (float) image.getHeight();
int width = image.getWidth();
BufferedImage thumb = image;
do {
width /= 2;
if (width < requestedThumbSize) {
width = requestedThumbSize;
}
BufferedImage temp = new BufferedImage(width, (int) (width / ratio), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(thumb, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
thumb = temp;
} while (width != requestedThumbSize);
return thumb;
}
public static BufferedImage createThumbnail(BufferedImage image, int newWidth, int newHeight) {
int width = image.getWidth();
int height = image.getHeight();
BufferedImage thumb = image;
do {
if (width > newWidth) {
width /= 2;
if (width < newWidth) {
width = newWidth;
}
}
if (height > newHeight) {
height /= 2;
if (height < newHeight) {
height = newHeight;
}
}
BufferedImage temp = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = temp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(thumb, 0, 0, temp.getWidth(), temp.getHeight(), null);
g2.dispose();
thumb = temp;
} while (width != newWidth || height != newHeight);
return thumb;
}
} |
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