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package com.juick.server.util;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.Imaging;
import org.apache.commons.imaging.common.ImageMetadata;
import org.apache.commons.imaging.formats.jpeg.JpegImageMetadata;
import org.apache.commons.imaging.formats.tiff.TiffField;
import org.apache.commons.imaging.formats.tiff.constants.TiffTagConstants;
import org.imgscalr.Scalr;
import org.imgscalr.Scalr.Rotation;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
public class ImageUtils {
/**
* Returns <code>BufferedImage</code>, same as <code>ImageIO.read()</code> does.
*
* <p>JPEG images with EXIF metadata are rotated according to Orientation tag.
*
* @param imageFile a <code>File</code> to read from.
*/
private static BufferedImage readImageWithOrientation(File imageFile)
throws IOException {
BufferedImage image = ImageIO.read(imageFile);
if (!FilenameUtils.getExtension(imageFile.getName()).equals("jpg")) {
return image;
}
try {
ImageMetadata metadata = Imaging.getMetadata(imageFile);
if (metadata instanceof JpegImageMetadata) {
JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
TiffField orientationField = jpegMetadata.findEXIFValue(TiffTagConstants.TIFF_TAG_ORIENTATION);
if (orientationField != null) {
int orientation = orientationField.getIntValue();
switch (orientation) {
case TiffTagConstants.ORIENTATION_VALUE_ROTATE_90_CW:
image = Scalr.rotate(image, Rotation.CW_90);
break;
case TiffTagConstants.ORIENTATION_VALUE_ROTATE_180:
image = Scalr.rotate(image, Rotation.CW_180);
break;
case TiffTagConstants.ORIENTATION_VALUE_ROTATE_270_CW:
image = Scalr.rotate(image, Rotation.CW_270);
break;
case TiffTagConstants.ORIENTATION_VALUE_MIRROR_HORIZONTAL:
image = Scalr.rotate(image, Rotation.FLIP_HORZ);
break;
case TiffTagConstants.ORIENTATION_VALUE_MIRROR_VERTICAL:
image = Scalr.rotate(image, Rotation.FLIP_VERT);
break;
case TiffTagConstants.ORIENTATION_VALUE_MIRROR_HORIZONTAL_AND_ROTATE_90_CW:
image = Scalr.rotate(Scalr.rotate(image, Rotation.FLIP_HORZ), Rotation.CW_90);
break;
case TiffTagConstants.ORIENTATION_VALUE_MIRROR_HORIZONTAL_AND_ROTATE_270_CW:
image = Scalr.rotate(Scalr.rotate(image, Rotation.FLIP_HORZ), Rotation.CW_270);
break;
case TiffTagConstants.ORIENTATION_VALUE_HORIZONTAL_NORMAL:
default:
// do nothing
break;
}
}
}
} catch (ImageReadException e) {
// failed to read metadata.
// nothing to do here, return image as is.
}
return image;
}
/**
* Move attached image from temp folder to image folder.
* Create preview images in corresponding folders.
*
* @param tempFilename Name of the image file in the temp folder.
* @param outputFilename Name that will be used in the image folder.
* @param tmpDir Path string for the temp folder.
* @param imgDir Path string for the image folder.
*/
public static void saveImageWithPreviews(String tempFilename, String outputFilename, String tmpDir, String imgDir)
throws IOException {
String ext = FilenameUtils.getExtension(outputFilename);
Path outputImagePath = Paths.get(imgDir, "p", outputFilename);
Files.move(Paths.get(tmpDir, tempFilename), outputImagePath);
BufferedImage originalImage = readImageWithOrientation(outputImagePath.toFile());
int width = originalImage.getWidth();
int height = originalImage.getHeight();
int maxDimension = (width > height) ? width : height;
BufferedImage image1024 = (maxDimension > 1024) ? Scalr.resize(originalImage, 1024) : originalImage;
BufferedImage image0512 = (maxDimension > 512) ? Scalr.resize(originalImage, 512) : originalImage;
BufferedImage image0160 = (maxDimension > 160) ? Scalr.resize(originalImage, 160) : originalImage;
ImageIO.write(image1024, ext, Paths.get(imgDir, "photos-1024", outputFilename).toFile());
ImageIO.write(image0512, ext, Paths.get(imgDir, "photos-512", outputFilename).toFile());
ImageIO.write(image0160, ext, Paths.get(imgDir, "ps", outputFilename).toFile());
}
/**
* Save new avatar in all required sizes.
*
* @param tempFilename Name of the image file in the temp folder.
* @param uid User id that is used to build image file names.
* @param tmpDir Path string for the temp folder.
* @param imgDir Path string for the image folder.
*/
public static void saveAvatar(String tempFilename, int uid, String tmpDir, String imgDir)
throws IOException {
String ext = FilenameUtils.getExtension(tempFilename);
String originalName = String.format("%s.%s", uid, ext);
Path originalPath = Paths.get(imgDir, "ao", originalName);
Files.move(Paths.get(tmpDir, tempFilename), originalPath, StandardCopyOption.REPLACE_EXISTING);
BufferedImage originalImage = ImageIO.read(originalPath.toFile());
String targetExt = "png";
String targetName = String.format("%s.%s", uid, targetExt);
ImageIO.write(Scalr.resize(originalImage, 96), targetExt, Paths.get(imgDir, "a", targetName).toFile());
ImageIO.write(Scalr.resize(originalImage, 32), targetExt, Paths.get(imgDir, "as", targetName).toFile());
}
}
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