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/* |
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Dateiverwaltung - File management in your browser |
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Copyright (C) 2017 Ulrich Hilger, http://uhilger.de |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Affero General Public License as |
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published by the Free Software Foundation, either version 3 of the |
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License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Affero General Public License for more details. |
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You should have received a copy of the GNU Affero General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package de.uhilger.filecms.data; |
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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.awt.image.ConvolveOp; |
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import java.awt.image.Kernel; |
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import java.io.File; |
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import java.io.FileNotFoundException; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import java.net.FileNameMap; |
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import java.net.URLConnection; |
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import javax.imageio.ImageIO; |
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/** |
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* Methoden zur Verkleinerung von Bildern |
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*/ |
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public class Bild { |
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public static final int WINZIG = 0; |
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public static final int KLEIN = 1; |
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public static final int MITTEL = 2; |
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public static final int GROSS = 3; |
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public static final String[] GRNAME = {"-w", "-k", "-m", "-g"}; |
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public static final int[] GR = {120, 240, 700, 1200}; |
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public void writeImageStream(Image image, int gr, String mimeType, OutputStream out) throws InterruptedException, IOException { |
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ImageIO.write(getReducedImage(image, gr, mimeType), imgType(mimeType), out); |
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} |
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/** |
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* |
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* @param image |
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* @param gr |
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* @param mimeType |
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* @param vName Name der verkleinerten Datei |
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* @throws InterruptedException |
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* @throws IOException |
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*/ |
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public void writeImageFile(Image image, int gr, String mimeType, String vName) throws InterruptedException, IOException { |
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ImageIO.write(getReducedImage(image, gr, mimeType), imgType(mimeType), new File(vName)); |
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} |
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private BufferedImage getReducedImage(Image image, int gr, String mimeType) throws InterruptedException, IOException { |
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BufferedImage img; |
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int q = 90; |
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float sh = 0.f; |
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if(mimeType.contains("jpeg")) { |
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img = getReducedImage(image, gr, gr, q, sh, false); |
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} else { |
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img = getReducedImage(image, gr, gr, q, sh, true); |
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} |
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return img; |
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} |
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/** |
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* Eine in Groesse und Qualitaet verringerte Bilddatei erzeugen |
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* @param image Ablageort und Name der Bilddatei |
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* @param width neue Breite |
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* @param height neue hoehe |
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* @param quality neue Qualitaet (0 - 100) |
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* @param factor Faktor fuer Schaerfe / Unschaerfe (z.B. -0.15f fuer leichte Unschaerfe, 0.05f fuer leichtes Nachschaerfen) |
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* @param withTransparency ob Transparenz benoetigt wird |
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* @return neues, in Groesse und Qualitaet entsprechend verringertes Bild |
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* @throws java.lang.InterruptedException |
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* @throws java.io.FileNotFoundException |
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*/ |
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public BufferedImage getReducedImage(Image image, int width, int height, int quality, float factor, boolean withTransparency) |
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throws InterruptedException, FileNotFoundException, IOException { |
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int imageWidth = image.getWidth(null); |
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int imageHeight = image.getHeight(null); |
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int thumbWidth = width; |
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int thumbHeight = height; |
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if(imageWidth < width) { |
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thumbWidth = imageWidth; |
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} |
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if(imageHeight < height) { |
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thumbHeight = imageHeight; |
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} |
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double thumbRatio = (double)thumbWidth / (double)thumbHeight; |
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double imageRatio = (double)imageWidth / (double)imageHeight; |
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if (thumbRatio < imageRatio) { |
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thumbHeight = (int)(thumbWidth / imageRatio); |
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} |
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else { |
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thumbWidth = (int)(thumbHeight * imageRatio); |
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} |
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// draw original image to thumbnail image object and |
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// scale it to the new size on-the-fly |
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//BufferedImage thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB); |
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BufferedImage thumbImage; |
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if(withTransparency) { |
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thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_ARGB); |
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} else { |
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thumbImage = new BufferedImage(thumbWidth, thumbHeight, BufferedImage.TYPE_INT_RGB); |
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} |
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Graphics2D graphics2D = thumbImage.createGraphics(); |
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graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); |
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graphics2D.drawImage(image, 0, 0, thumbWidth, thumbHeight, null); |
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// 30.7.2007: sharpening hinzugefuegt (Anfang) |
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//float factor = -0.15f; // minus = sharpen, plus = soften |
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//float[] sharpenArray = {0, -1, 0, -1, 5, -1, 0, -1, 0}; |
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/* |
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30.6.2013: sharpening als Weichmacher nur, wenn Bild < 400 |
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*/ |
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/*if(thumbWidth < 400 || thumbHeight < 400) { |
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factor = 0.1f; |
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}*/ |
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if(factor != 0.f) { |
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float[] array = {0, factor, 0, factor, 1-(factor*4), factor, 0, factor, 0}; |
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Kernel kernel = new Kernel(3, 3, array); |
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ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null); |
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thumbImage = cOp.filter(thumbImage, null); |
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} |
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// 30.7.2007: sharpening hinzugefuegt (Ende) |
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return thumbImage; |
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} |
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public String imgType(String mimeType) { |
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String imgType; |
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if(mimeType.contains("jpg")) { |
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imgType = "jpg"; |
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} else if(mimeType.contains("jpeg")) { |
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imgType = "jpg"; |
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} else if(mimeType.contains("png")) { |
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imgType = "png"; |
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} else if(mimeType.contains("gif")) { |
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imgType = "gif"; |
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} else { |
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imgType = "jpg"; |
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} |
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return imgType; |
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} |
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/** |
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* |
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* @param v Bild.WINZIG .. Bild.GROSS |
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* @return Länge der längsten Kante in Bildpunkten |
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*/ |
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public int getVariantenGroesse(int v) { |
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return GR[v]; |
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} |
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public String getVariantenName(int v) { |
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return GRNAME[v]; |
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} |
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public String getMimeType(File file) { |
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String absName = file.getAbsolutePath(); |
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FileNameMap fileNameMap = URLConnection.getFileNameMap(); |
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return fileNameMap.getContentTypeFor("file://" + absName); |
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} |
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} |