1 /*

     2  * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package com.sun.imageio.plugins.tiff;

    26 

    27 import java.awt.Rectangle;

    28 import java.awt.image.BufferedImage;

    29 import java.awt.image.ColorModel;

    30 import java.awt.image.Raster;

    31 import java.awt.image.RenderedImage;

    32 import java.awt.image.SampleModel;

    33 import java.awt.image.WritableRaster;

    34 import java.io.IOException;

    35 import java.util.Iterator;

    36 import java.util.List;

    37 import java.util.Vector;

    38 import javax.imageio.ImageReadParam;

    39 import javax.imageio.ImageTypeSpecifier;

    40 import javax.imageio.plugins.tiff.TIFFImageReadParam;

    41 import javax.imageio.plugins.tiff.TIFFTagSet;

    42 

    43 public class TIFFRenderedImage implements RenderedImage {

    44 

    45     private TIFFImageReader reader;

    46     private int imageIndex;

    47     private ImageReadParam tileParam;

    48 

    49     private int subsampleX;

    50     private int subsampleY;

    51 

    52     private boolean isSubsampling;

    53 

    54     private int width;

    55     private int height;

    56     private int tileWidth;

    57     private int tileHeight;

    58 

    59     private ImageTypeSpecifier its;

    60 

    61     public TIFFRenderedImage(TIFFImageReader reader,

    62                              int imageIndex,

    63                              ImageReadParam readParam,

    64                              int width, int height) throws IOException {

    65         this.reader = reader;

    66         this.imageIndex = imageIndex;

    67         this.tileParam = cloneImageReadParam(readParam, false);

    68 

    69         this.subsampleX = tileParam.getSourceXSubsampling();

    70         this.subsampleY = tileParam.getSourceYSubsampling();

    71 

    72         this.isSubsampling = this.subsampleX != 1 || this.subsampleY != 1;

    73 

    74         this.width = width/subsampleX;

    75         this.height = height/subsampleY;

    76 

    77         // If subsampling is being used, we may not match the

    78         // true tile grid exactly, but everything should still work

    79         this.tileWidth = reader.getTileWidth(imageIndex)/subsampleX;

    80         this.tileHeight = reader.getTileHeight(imageIndex)/subsampleY;

    81 

    82         Iterator<ImageTypeSpecifier> iter = reader.getImageTypes(imageIndex);

    83         this.its = iter.next();

    84         tileParam.setDestinationType(its);

    85     }

    86 

    87     /**

    88      * Creates a copy of <code>param</code>. The source subsampling and

    89      * and bands settings and the destination bands and offset settings

    90      * are copied. If <code>param</code> is a <code>TIFFImageReadParam</code>

    91      * then the <code>TIFFDecompressor</code> and

    92      * <code>TIFFColorConverter</code> settings are also copied; otherwise

    93      * they are explicitly set to <code>null</code>.

    94      *

    95      * @param param the parameters to be copied.

    96      * @param copyTagSets whether the <code>TIFFTagSet</code> settings

    97      * should be copied if set.

    98      * @return copied parameters.

    99      */

   100     private ImageReadParam cloneImageReadParam(ImageReadParam param,

   101                                                boolean copyTagSets) {

   102         // Create a new TIFFImageReadParam.

   103         TIFFImageReadParam newParam = new TIFFImageReadParam();

   104 

   105         // Copy the basic settings.

   106         newParam.setSourceSubsampling(param.getSourceXSubsampling(),

   107                                       param.getSourceYSubsampling(),

   108                                       param.getSubsamplingXOffset(),

   109                                       param.getSubsamplingYOffset());

   110         newParam.setSourceBands(param.getSourceBands());

   111         newParam.setDestinationBands(param.getDestinationBands());

   112         newParam.setDestinationOffset(param.getDestinationOffset());

   113 

   114         if (param instanceof TIFFImageReadParam && copyTagSets) {

   115             // Copy the settings from the input parameter.

   116             TIFFImageReadParam tparam = (TIFFImageReadParam) param;

   117 

   118             List<TIFFTagSet> tagSets = tparam.getAllowedTagSets();

   119             if (tagSets != null) {

   120                 Iterator<TIFFTagSet> tagSetIter = tagSets.iterator();

   121                 if (tagSetIter != null) {

   122                     while (tagSetIter.hasNext()) {

   123                         TIFFTagSet tagSet = tagSetIter.next();

   124                         newParam.addAllowedTagSet(tagSet);

   125                     }

   126                 }

   127             }

   128         }

   129 

   130         return newParam;

   131     }

   132 

   133     public Vector<RenderedImage> getSources() {

   134         return null;

   135     }

   136 

   137     public Object getProperty(String name) {

   138         return java.awt.Image.UndefinedProperty;

   139     }

   140 

   141     public String[] getPropertyNames() {

   142         return null;

   143     }

   144 

   145     public ColorModel getColorModel() {

   146         return its.getColorModel();

   147     }

   148 

   149     public SampleModel getSampleModel() {

   150         return its.getSampleModel();

   151     }

   152 

   153     public int getWidth() {

   154         return width;

   155     }

   156 

   157     public int getHeight() {

   158         return height;

   159     }

   160 

   161     public int getMinX() {

   162         return 0;

   163     }

   164 

   165     public int getMinY() {

   166         return 0;

   167     }

   168 

   169     public int getNumXTiles() {

   170         return (width + tileWidth - 1)/tileWidth;

   171     }

   172 

   173     public int getNumYTiles() {

   174         return (height + tileHeight - 1)/tileHeight;

   175     }

   176 

   177     public int getMinTileX() {

   178         return 0;

   179     }

   180 

   181     public int getMinTileY() {

   182         return 0;

   183     }

   184 

   185     public int getTileWidth() {

   186         return tileWidth;

   187     }

   188 

   189     public int getTileHeight() {

   190         return tileHeight;

   191     }

   192 

   193     public int getTileGridXOffset() {

   194         return 0;

   195     }

   196 

   197     public int getTileGridYOffset() {

   198         return 0;

   199     }

   200 

   201     public Raster getTile(int tileX, int tileY) {

   202         Rectangle tileRect = new Rectangle(tileX*tileWidth,

   203                                            tileY*tileHeight,

   204                                            tileWidth,

   205                                            tileHeight);

   206         return getData(tileRect);

   207     }

   208 

   209     public Raster getData() {

   210         return read(new Rectangle(0, 0, getWidth(), getHeight()));

   211     }

   212 

   213     public Raster getData(Rectangle rect) {

   214         return read(rect);

   215     }

   216 

   217     // This method needs to be synchronized as it updates the instance

   218     // variable 'tileParam'.

   219     public synchronized WritableRaster read(Rectangle rect) {

   220         tileParam.setSourceRegion(isSubsampling ?

   221                                   new Rectangle(subsampleX*rect.x,

   222                                                 subsampleY*rect.y,

   223                                                 subsampleX*rect.width,

   224                                                 subsampleY*rect.height) :

   225                                   rect);

   226 

   227         try {

   228             BufferedImage bi = reader.read(imageIndex, tileParam);

   229             WritableRaster ras = bi.getRaster();

   230             return ras.createWritableChild(0, 0,

   231                                            ras.getWidth(), ras.getHeight(),

   232                                            rect.x, rect.y,

   233                                            null);

   234         } catch (IOException e) {

   235             throw new RuntimeException(e);

   236         }

   237     }

   238 

   239     public WritableRaster copyData(WritableRaster raster) {

   240         if (raster == null) {

   241             return read(new Rectangle(0, 0, getWidth(), getHeight()));

   242         } else {

   243             Raster src = read(raster.getBounds());

   244             raster.setRect(src);

   245             return raster;

   246         }

   247     }

   248 }