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Diffstat (limited to 'src/main/java/com/juick/server/util/ImageUtils.java')
| -rw-r--r-- | src/main/java/com/juick/server/util/ImageUtils.java | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/main/java/com/juick/server/util/ImageUtils.java b/src/main/java/com/juick/server/util/ImageUtils.java new file mode 100644 index 00000000..d16faf8f --- /dev/null +++ b/src/main/java/com/juick/server/util/ImageUtils.java @@ -0,0 +1,175 @@ + +/* + * Copyright (C) 2008-2017, Juick + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as + * published by the Free Software Foundation, either version 3 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +package com.juick.server.util; + +import com.juick.Attachment; +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.apache.commons.io.FileUtils; +import org.apache.commons.io.FilenameUtils; +import org.imgscalr.Scalr; +import org.imgscalr.Scalr.Rotation; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.imageio.ImageIO; +import javax.imageio.ImageReader; +import javax.imageio.stream.FileImageInputStream; +import javax.imageio.stream.ImageInputStream; +import java.awt.image.BufferedImage; +import java.io.File; +import java.io.IOException; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.nio.file.StandardCopyOption; +import java.util.Iterator; + +public class ImageUtils { + private static final Logger logger = LoggerFactory.getLogger(ImageUtils.class); + + private String imgDir; + private String tmpDir; + + public ImageUtils(String imgDir, String tmpDir) { + this.imgDir = imgDir; + this.tmpDir = tmpDir; + } +/** + * 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; + } + + public void saveImageWithPreviews(String tempFilename, String outputFilename) + throws IOException { + String ext = FilenameUtils.getExtension(outputFilename); + + Path outputImagePath = Paths.get(imgDir, "p", outputFilename); + // this throws strange exceptions + // Files.move(Paths.get(tmpDir, tempFilename), outputImagePath); + FileUtils.moveFile(Paths.get(tmpDir, tempFilename).toFile(), outputImagePath.toFile()); + 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()); + } + + public void saveAvatar(String tempFilename, int uid) + 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()); + } + public Attachment getAttachment(File imgFile) throws IOException { + Attachment attachment = new Attachment(); + try (ImageInputStream stream = ImageIO.createImageInputStream(imgFile)) { + Iterator<ImageReader> iter = ImageIO.getImageReaders(stream); + while (iter.hasNext()) { + ImageReader reader = iter.next(); + try { + reader.setInput(stream); + attachment.setWidth(reader.getWidth(reader.getMinIndex())); + attachment.setHeight(reader.getHeight(reader.getMinIndex())); + return attachment; + } catch (Exception e) { + logger.debug("Error reading {}, trying next reader", imgFile.getAbsolutePath()); + } finally { + reader.dispose(); + } + } + } + + logger.warn("Not a known image file {}", imgFile.getAbsolutePath()); + return attachment; + } +}
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