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Added background reading.

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This commit is contained in:
Harald Kuhr 2009-10-04 17:33:58 +02:00
parent aa68a4018c
commit 2759dc3a99
1 changed files with 67 additions and 33 deletions
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100
twelvemonkeys-imageio/pict/src/main/java/com/twelvemonkeys/imageio/plugins/pict/TestPICTClippingApp.java Executable file → Normal file
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@ -5,21 +5,25 @@ import com.twelvemonkeys.image.ImageUtil;
import com.twelvemonkeys.net.MIMEUtil; import com.twelvemonkeys.net.MIMEUtil;
import javax.imageio.ImageIO; import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageReadParam; import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream; import javax.imageio.stream.ImageInputStream;
import javax.swing.*; import javax.swing.*;
import java.awt.*; import java.awt.*;
import java.awt.color.ColorSpace;
import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable; import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException; import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.image.BufferedImage; import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.io.File; import java.io.File;
import java.io.FileInputStream; import java.io.FileInputStream;
import java.io.IOException; import java.io.IOException;
import java.io.InputStream; import java.io.InputStream;
import java.util.Iterator; import java.util.Iterator;
import java.util.List; import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/** /**
* TestPICTClippingApp * TestPICTClippingApp
@ -29,6 +33,7 @@ import java.util.List;
* @version $Id: TestPICTClippingApp.java,v 1.0 Feb 16, 2009 3:05:16 PM haraldk Exp$ * @version $Id: TestPICTClippingApp.java,v 1.0 Feb 16, 2009 3:05:16 PM haraldk Exp$
*/ */
public class TestPICTClippingApp { public class TestPICTClippingApp {
public static void main(final String[] pArgs) { public static void main(final String[] pArgs) {
SwingUtilities.invokeLater(new Runnable() { SwingUtilities.invokeLater(new Runnable() {
public void run() { public void run() {
@ -58,6 +63,7 @@ public class TestPICTClippingApp {
private static class ImageDropHandler extends TransferHandler { private static class ImageDropHandler extends TransferHandler {
private final JLabel mLabel; private final JLabel mLabel;
private final ExecutorService mExecutor = Executors.newSingleThreadExecutor();
public ImageDropHandler(JLabel pLabel) { public ImageDropHandler(JLabel pLabel) {
super(null); super(null);
@ -108,7 +114,7 @@ public class TestPICTClippingApp {
input = (InputStream) data; input = (InputStream) data;
} }
ImageInputStream stream = ImageIO.createImageInputStream(input); final ImageInputStream stream = ImageIO.createImageInputStream(input);
Iterator<ImageReader> readers = ImageIO.getImageReaders(stream); Iterator<ImageReader> readers = ImageIO.getImageReaders(stream);
if (!readers.hasNext()) { if (!readers.hasNext()) {
@ -118,33 +124,16 @@ public class TestPICTClippingApp {
} }
if (readers.hasNext()) { if (readers.hasNext()) {
ImageReader reader = readers.next(); final ImageReader imageReader = readers.next();
reader.setInput(stream); mExecutor.execute(new Runnable() {
final int maxDimension = 200;
int w = reader.getWidth(0);
int h = reader.getHeight(0);
ImageReadParam param = null;
if (w > maxDimension && h > maxDimension) {
int sub = (int) Math.ceil(Math.min(w, h) / (double) maxDimension) / 3;
if (sub > 1) {
param = reader.getDefaultReadParam();
param.setSourceSubsampling(sub, sub, 0, 0);
}
}
System.out.printf("Reading %s format%s... ", reader.getFormatName(), (param != null ? ", sampling every " + param.getSourceXSubsampling() + "th pixel" : ""));
final BufferedImage image = reader.read(0, param);
System.out.printf("Done (%dx%d).%n", image.getWidth(), image.getHeight());
SwingUtilities.invokeLater(new Runnable() {
public void run() { public void run() {
System.out.print("Scaling image... "); try {
BufferedImage scaled = box(image, maxDimension); readAndInstallImage(stream, imageReader);
System.out.printf("Done (%dx%d).%n", scaled.getWidth(), scaled.getHeight()); }
mLabel.setIcon(new BufferedImageIcon(scaled)); catch (IOException e) {
e.printStackTrace();
}
} }
}); });
@ -170,22 +159,67 @@ public class TestPICTClippingApp {
return false; return false;
} }
private void readAndInstallImage(final ImageInputStream pStream, final ImageReader reader) throws IOException {
reader.setInput(pStream);
final int maxDimension = 200;
int w = reader.getWidth(0);
int h = reader.getHeight(0);
ImageReadParam param = null;
if (w > maxDimension && h > maxDimension) {
int sub = (int) Math.ceil((Math.max(w, h) / (double) maxDimension) / 3.0);
if (sub > 1) {
param = reader.getDefaultReadParam();
param.setSourceSubsampling(sub, sub, 0, 0);
}
}
System.out.printf("Reading %s format%s... ", reader.getFormatName(), (param != null ? ", sampling every " + param.getSourceXSubsampling() + "th pixel" : ""));
final BufferedImage image = reader.read(0, param);
System.out.printf("Done (%dx%d).%n", image.getWidth(), image.getHeight());
reader.dispose();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
System.out.print("Scaling image... ");
BufferedImage scaled = box(image, maxDimension);
System.out.printf("Done (%dx%d).%n", scaled.getWidth(), scaled.getHeight());
mLabel.setIcon(new BufferedImageIcon(scaled));
}
});
}
private BufferedImage box(final BufferedImage pImage, final int pMaxDimension) { private BufferedImage box(final BufferedImage pImage, final int pMaxDimension) {
if (pImage.getWidth() > pMaxDimension || pImage.getHeight() > pMaxDimension) { // TODO: ImageUtil.toRGB method? ColorConvertOp MUCH faster than ImageUtil.toBuffered(img, type)
BufferedImage image = pImage;
if (image.getType() == 0) {
try {
ColorConvertOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_sRGB), null);
image = op.filter(image, new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_4BYTE_ABGR_PRE));
}
catch (Exception e) {
e.printStackTrace();
image = ImageUtil.accelerate(image);
}
}
if (image.getWidth() > pMaxDimension || image.getHeight() > pMaxDimension) {
int w, h; int w, h;
if (pImage.getWidth() > pImage.getHeight()) { if (image.getWidth() > image.getHeight()) {
w = pMaxDimension; w = pMaxDimension;
h = (int) Math.round(w / (pImage.getWidth() / (double) pImage.getHeight())); h = (int) Math.round(w / (image.getWidth() / (double) image.getHeight()));
} }
else { else {
h = pMaxDimension; h = pMaxDimension;
w = (int) Math.round(h * (pImage.getWidth() / (double) pImage.getHeight())); w = (int) Math.round(h * (image.getWidth() / (double) image.getHeight()));
} }
return ImageUtil.createResampled(pImage, w, h, Image.SCALE_DEFAULT); return ImageUtil.createResampled(image, w, h, Image.SCALE_DEFAULT);
} }
return pImage; return image;
} }
} }
} }