136 lines
3.9 KiB
Java
136 lines
3.9 KiB
Java
package org.gcube.data.access.storagehub.handlers.content;
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import java.awt.Color;
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import java.awt.Graphics2D;
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import java.awt.Image;
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import java.awt.RenderingHints;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.util.Calendar;
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import javax.imageio.ImageIO;
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import org.apache.commons.io.FilenameUtils;
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import org.gcube.common.storagehub.model.annotations.MimeTypeHandler;
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import org.gcube.common.storagehub.model.items.ImageFile;
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import org.gcube.common.storagehub.model.items.nodes.ImageContent;
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import org.gcube.common.storagehub.model.types.ItemAction;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@MimeTypeHandler({"image/gif", "image/jpeg","image/png" /*, "image/svg+xml"*/})
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public class ImageHandler implements ContentHandler{
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private static final int THUMB_MAX_DIM = 300;
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private ImageContent content = new ImageContent();
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private static final Logger logger = LoggerFactory.getLogger(ImageHandler.class);
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@Override
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public void initiliseSpecificContent(InputStream is, String fileName) throws Exception {
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Image image = javax.imageio.ImageIO.read(is);
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int width = image.getWidth(null);
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int height = image.getHeight(null);
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content.setWidth(Long.valueOf(width));
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content.setHeight(Long.valueOf(height));
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try {
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int[] dimension = getThumbnailDimension(width, height);
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byte[] buf = transform(image, fileName, dimension[0], dimension[1]).toByteArray();
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content.setThumbnailHeight(Long.valueOf(dimension[1]));
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content.setThumbnailWidth(Long.valueOf(dimension[0]));
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content.setThumbnailData(buf);
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}catch(Throwable t) {
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logger.warn("thumbnail for file {} cannot be created ", fileName,t);
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}
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}
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@Override
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public ImageContent getContent() {
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return content;
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}
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private int[] getThumbnailDimension(int original_width, int original_height) {
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int new_width = 0;
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int new_height = 0;
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if ((original_width < THUMB_MAX_DIM) && (original_height< THUMB_MAX_DIM)){
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new_width = original_width;
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new_height = original_height;
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}
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if (original_width > THUMB_MAX_DIM) {
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new_width = THUMB_MAX_DIM;
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new_height = (new_width * original_height) / original_width;
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}
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if (original_width < THUMB_MAX_DIM) {
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new_width = THUMB_MAX_DIM;
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new_height = (new_width * original_height) / original_width;
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}
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if (new_height > THUMB_MAX_DIM) {
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new_height = THUMB_MAX_DIM;
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new_width = (new_height * original_width) / original_height;
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}
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if (new_width > THUMB_MAX_DIM) {
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new_width = THUMB_MAX_DIM;
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new_height = (new_width * original_height) / original_width;
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}
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int[] dimension = {new_width, new_height};
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return dimension;
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}
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@Override
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public ImageFile buildItem(String name, String description, String login) {
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ImageFile item = new ImageFile();
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Calendar now = Calendar.getInstance();
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item.setName(name);
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item.setTitle(name);
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item.setDescription(description);
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//item.setCreationTime(now);
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item.setHidden(false);
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item.setLastAction(ItemAction.CREATED);
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item.setLastModificationTime(now);
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item.setLastModifiedBy(login);
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item.setOwner(login);
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item.setContent(this.content);
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return item;
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}
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public ByteArrayOutputStream transform(Image image,
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String originalFile, int thumbWidth,
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int thumbHeight)
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throws Exception {
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BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB);
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Graphics2D graphics2D = thumbImage.createGraphics();
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graphics2D.setBackground(Color.WHITE);
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graphics2D.setPaint(Color.WHITE);
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graphics2D.fillRect(0, 0, thumbWidth, thumbHeight);
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graphics2D.setRenderingHint(
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RenderingHints.KEY_INTERPOLATION,
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RenderingHints.VALUE_INTERPOLATION_BILINEAR);
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graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null);
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String ext = FilenameUtils.getExtension(originalFile);
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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ImageIO.write(thumbImage, ext, os);
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return os;
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}
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}
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