taskify thumbnail loading

Core/src/org/sleuthkit/autopsy/coreutils/ImageUtils.java

@@ -44,6 +44,7 @@ import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Executors;
 import java.util.logging.Level;
+import javafx.beans.Observable;
 import javafx.concurrent.Task;
 import javafx.embed.swing.SwingFXUtils;
 import javax.annotation.Nonnull;
@@ -57,6 +58,7 @@ import javax.imageio.stream.ImageInputStream;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.concurrent.BasicThreadFactory;
 import org.opencv.core.Core;
+import org.openide.util.Exceptions;
 import org.openide.util.NbBundle;
 import org.sleuthkit.autopsy.casemodule.Case;
 import org.sleuthkit.autopsy.corelibs.ScalrWrapper;
@@ -409,6 +411,7 @@ public class ImageUtils {
     }
 
     /**
+     *
      * Get a file object for where the cached icon should exist. The returned
      * file may not exist.
      *
@@ -615,17 +618,119 @@ public class ImageUtils {
         }
     }
 
-    public static Task<javafx.scene.image.Image> newReadImageTask(AbstractFile file) {
+    public static Task<javafx.scene.image.Image> newGetThumbnailTask(AbstractFile file, int iconSize) {
-        return new ReadImageTask(file);
+        return new GetOrGenerateThumbnailTask(file, iconSize);
     }
 
-    static private class ReadImageTask extends Task<javafx.scene.image.Image> implements IIOReadProgressListener {
+    static private class GetOrGenerateThumbnailTask extends ReadImageTaskBase {
+
+        private final int iconSize;
+
+        private GetOrGenerateThumbnailTask(AbstractFile file, int iconSize) {
+            super(file);
+            this.iconSize = iconSize;
+        }
+
+        @Override
+        protected javafx.scene.image.Image call() throws Exception {
+
+            // If a thumbnail file is already saved locally, just read that.
+            File cacheFile = getCachedThumbnailLocation(file.getId());
+            if (cacheFile.exists()) {
+                try {
+                    BufferedImage cachedThumbnail = ImageIO.read(cacheFile);
+                    if (nonNull(cachedThumbnail) && cachedThumbnail.getWidth() == iconSize) {
+                        return SwingFXUtils.toFXImage(cachedThumbnail, null);
+                    }
+                } catch (Exception ex) {
+                    LOGGER.log(Level.WARNING, "ImageIO had a problem reading thumbnail for image {0}: {1}", new Object[]{file.getName(), ex.getMessage()}); //NON-NLS
+                }
+            }
+
+            //no cached thumbnail so read the image from the datasource using the ReadImageTask
+            final ReadImageTask readImageTask = new ReadImageTask(file);
+            readImageTask.progressProperty().addListener((Observable observable)
+                    -> updateProgress(readImageTask.getWorkDone(), readImageTask.getTotalWork()));
+            readImageTask.messageProperty().addListener((Observable observable)
+                    -> updateMessage(readImageTask.getMessage()));
+            readImageTask.run();
+            try {
+                BufferedImage bufferedImage = readImageTask.getBufferedImage();
+                if (isNull(bufferedImage)) {
+                    LOGGER.log(Level.WARNING, "Failed to read image for thumbnail generation.");
+                    throw new IIOException("Failed to read image for thumbnail generation.");
+                }
+
+                updateMessage("scaling image");
+                updateProgress(-1, 1);
+
+                BufferedImage thumbnail;
+                try {
+                    thumbnail = ScalrWrapper.resizeFast(bufferedImage, iconSize);
+                } catch (IllegalArgumentException | OutOfMemoryError e) {
+                    // if resizing does not work due to extreme aspect ratio, crop the image instead.
+                    try {
+                        LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}.\nAttemptying to crop {0} instead", new Object[]{file.getUniquePath(), e.getLocalizedMessage()}); //NON-NLS
+                    } catch (TskCoreException tskCoreException) {
+                        LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}.\nAttemptying to crop {0} instead", new Object[]{file.getName(), e.getLocalizedMessage()}); //NON-NLS
+                        LOGGER.log(Level.SEVERE, "Failed to get unique path for file: " + file.getName(), tskCoreException); //NOI18N
+                    }
+                    final int cropHeight = Math.min(iconSize, bufferedImage.getHeight());
+                    final int cropWidth = Math.min(iconSize, bufferedImage.getWidth());
+                    try {
+                        thumbnail = ScalrWrapper.cropImage(bufferedImage, cropWidth, cropHeight);
+                    } catch (Exception e2) {
+                        LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}", new Object[]{file.getName(), e2.getLocalizedMessage()}); //NON-NLS
+                        throw e2;
+                    }
+                } catch (Exception e) {
+                    LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}", new Object[]{file.getName(), e.getLocalizedMessage()}); //NON-NLS
+                    throw e;
+                }
+                updateProgress(-1, 1);
+
+                saveThumbnail(thumbnail, cacheFile);
+                return SwingFXUtils.toFXImage(thumbnail, null);
+            } catch (InterruptedException | ExecutionException e) {
+//                 try {
+//                    LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}.\nAttemptying to crop {0} instead", new Object[]{file.getUniquePath(), e.getLocalizedMessage()}); //NON-NLS
+//                } catch (TskCoreException tskCoreException) {
+//                    LOGGER.log(Level.WARNING, "Could not scale image {0}: {1}.\nAttemptying to crop {0} instead", new Object[]{file.getName(), e.getLocalizedMessage()}); //NON-NLS
+//                    LOGGER.log(Level.SEVERE, "Failed to get unique path for file: " + file.getName(), tskCoreException); //NOI18N
+//                }
+                throw e;
+            }
+
+        }
+
+        private void saveThumbnail(BufferedImage thumbnail, File cacheFile) {
+            if (nonNull(thumbnail) && DEFAULT_THUMBNAIL != thumbnail) {
+                imageSaver.execute(() -> {
+                    try {
+                        Files.createParentDirs(cacheFile);
+                        if (cacheFile.exists()) {
+                            cacheFile.delete();
+                        }
+                        ImageIO.write(thumbnail, FORMAT, cacheFile);
+                    } catch (IllegalArgumentException | IOException ex1) {
+                        LOGGER.log(Level.WARNING, "Could not write cache thumbnail: " + file.getName(), ex1); //NON-NLS
+                    }
+                });
+            }
+        }
+    }
+
+    public static Task<javafx.scene.image.Image> newReadImageTask(AbstractFile file) {
+        return new ReadImageTask(file);
+
+    }
+
+    static private class ReadImageTask extends ReadImageTaskBase {
 
-        private final AbstractFile file;
         volatile private BufferedImage bufferedImage = null;
 
         ReadImageTask(AbstractFile file) {
-            this.file = file;
+            super(file);
         }
 
         @Override
@@ -635,7 +740,6 @@ public class ImageUtils {
         protected javafx.scene.image.Image call() throws Exception {
             updateMessage(Bundle.LoadImageTask_mesageText(file.getName()));
             try (InputStream inputStream = new BufferedInputStream(new ReadContentInputStream(file));) {
-
                 if (ImageUtils.isGIF(file)) {
                     //directly read GIF to preserve potential animation,
                     javafx.scene.image.Image image = new javafx.scene.image.Image(new BufferedInputStream(inputStream));
@@ -657,8 +761,9 @@ public class ImageUtils {
                         reader.setInput(input);
                         /*
                          * This is the important part, get or create a
-                         * ReadParam, create a destination image to hold the
+                         * ImageReadParam, create a destination image to hold
-                         * decoded result, then pass that image with the param.
+                         * the decoded result, then pass that image with the
+                         * param.
                          */
                         ImageReadParam param = reader.getDefaultReadParam();
 
@@ -679,20 +784,36 @@ public class ImageUtils {
             }
         }
 
-        public void logError(@Nullable Throwable e) {
+        public BufferedImage getBufferedImage() throws InterruptedException, ExecutionException {
-            String message = e == null ? "" : "It may be unsupported or corrupt: " + e.getLocalizedMessage(); //NOI18N
+            get();
-            try {
+            return bufferedImage;
-                LOGGER.log(Level.WARNING, "Could not read the image: {0}.  {1}", new Object[]{file.getUniquePath(), message}); //NOI18N
+        }
-            } catch (TskCoreException tskCoreException) {
+
-                LOGGER.log(Level.WARNING, "Could not read the image: {0}.  {1}", new Object[]{file.getName(), message}); //NOI18N
+    }
-                LOGGER.log(Level.SEVERE, "Failed to get unique path for file", tskCoreException); //NOI18N
+
-            }
+    static private abstract class ReadImageTaskBase extends Task<javafx.scene.image.Image> implements IIOReadProgressListener {
+
+        protected final AbstractFile file;
+
+        public ReadImageTaskBase(AbstractFile file) {
+            this.file = file;
         }
 
         @Override
-        protected void failed() {
+        public void imageProgress(ImageReader source, float percentageDone) {
-            super.failed();
+            //update this task with the progress reported by ImageReader.read
-            logError(getException());
+            updateProgress(percentageDone, 100);
+        }
+
+        public void logError(@Nullable Throwable e) {
+            Exceptions.printStackTrace(e);
+            String message = e == null ? "" : "It may be unsupported or corrupt: " + e.getLocalizedMessage(); //NOI18N
+            try {
+                LOGGER.log(Level.WARNING, "ImageIO could not read {0}.  {1}", new Object[]{file.getUniquePath(), message}); //NOI18N
+            } catch (TskCoreException tskCoreException) {
+                LOGGER.log(Level.WARNING, "ImageIO could not read {0}.  {1}", new Object[]{file.getName(), message}); //NOI18N
+                LOGGER.log(Level.SEVERE, "Failed to get unique path for file: " + file.getName(), tskCoreException); //NOI18N
+            }
         }
 
         @Override
@@ -714,13 +835,9 @@ public class ImageUtils {
         }
 
         @Override
-        public void imageProgress(ImageReader source, float percentageDone) {
+        protected void failed() {
-            //update this task with the progress reported by ImageReader.read
+            super.failed();
-            updateProgress(percentageDone, 100);
+            logError(getException());
-        }
-
-        @Override
-        public void imageStarted(ImageReader source, int imageIndex) {
         }
 
         @Override
@@ -728,6 +845,10 @@ public class ImageUtils {
             updateProgress(100, 100);
         }
 
+        @Override
+        public void imageStarted(ImageReader source, int imageIndex) {
+        }
+
         @Override
         public void sequenceStarted(ImageReader source, int minIndex) {
         }

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ThumbnailCache.java

@@ -31,12 +31,15 @@ import java.util.Optional;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Level;
+import javafx.beans.Observable;
 import javafx.beans.property.SimpleIntegerProperty;
+import javafx.concurrent.Task;
 import javafx.embed.swing.SwingFXUtils;
 import javafx.scene.image.Image;
 import javafx.scene.image.WritableImage;
 import javax.annotation.Nullable;
 import javax.imageio.ImageIO;
+import org.openide.util.Exceptions;
 import org.sleuthkit.autopsy.coreutils.ImageUtils;
 import org.sleuthkit.autopsy.coreutils.Logger;
 import org.sleuthkit.autopsy.imagegallery.datamodel.DrawableFile;
@@ -165,7 +168,7 @@ public enum ThumbnailCache {
      *
      * @param id the obj id of the file to get a cache file for
      *
-     * @return a Optional containing a File to store the cahced icon in or an
+     * @return a Optional containing a File to store the cached icon in or an
      *         empty optional if there was a problem.
      */
     private static Optional<File> getCacheFile(DrawableFile<?> file) {
@@ -177,4 +180,28 @@ public enum ThumbnailCache {
             return Optional.empty();
         }
     }
+
+    public Task<Image> getThumbnailTask(DrawableFile<?> file) {
+        final Optional<Image> option = cache.getIfPresent(file.getId());
+        if (option != null && option.isPresent()) {
+            return new Task<Image>() {
+                @Override
+                protected Image call() throws Exception {
+                    return option.get();
+                }
+            };
+        }
+        final Task<Image> newGetThumbnailTask = ImageUtils.newGetThumbnailTask(file.getAbstractFile(), MAX_THUMBNAIL_SIZE);
+        newGetThumbnailTask.stateProperty().addListener((Observable observable) -> {
+            switch (newGetThumbnailTask.getState()) {
+                case SUCCEEDED:
+                    try {
+                        cache.put(Long.MIN_VALUE, Optional.of(newGetThumbnailTask.get()));
+                    } catch (InterruptedException | ExecutionException ex) {
+                        Exceptions.printStackTrace(ex);
+                    }
+            }
+        });
+        return newGetThumbnailTask;
+    }
 }

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/DrawableFile.java

@@ -23,7 +23,6 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
-import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.ExecutionException;
 import java.util.logging.Level;
@@ -39,7 +38,6 @@ import org.apache.commons.lang3.text.WordUtils;
 import org.sleuthkit.autopsy.casemodule.Case;
 import org.sleuthkit.autopsy.coreutils.Logger;
 import org.sleuthkit.autopsy.imagegallery.FileTypeUtils;
-import org.sleuthkit.autopsy.imagegallery.ThumbnailCache;
 import org.sleuthkit.datamodel.AbstractFile;
 import org.sleuthkit.datamodel.BlackboardArtifact;
 import org.sleuthkit.datamodel.BlackboardAttribute;
@@ -79,6 +77,7 @@ public abstract class DrawableFile<T extends AbstractFile> extends AbstractFile
     }
 
     SoftReference<Image> imageRef;
+//    SoftReference<Image> thumbref;
 
     private String drawablePath;
 
@@ -258,12 +257,19 @@ public abstract class DrawableFile<T extends AbstractFile> extends AbstractFile
         }
     }
 
+    @Deprecated
     public Image getThumbnail() {
-        return ThumbnailCache.getDefault().get(this);
+        try {
+            return getThumbnailTask().get();
+        } catch (InterruptedException | ExecutionException ex) {
+            return null;
+        }
+
     }
 
-    @Deprecated
+    public abstract Task<Image> getThumbnailTask();
 
+    @Deprecated //use non-blocking getReadFullSizeImageTask  instead for most cases
     public Image getFullSizeImage() {
         try {
             return getReadFullSizeImageTask().get();
@@ -304,11 +310,6 @@ public abstract class DrawableFile<T extends AbstractFile> extends AbstractFile
         }
     }
 
-    public boolean isDisplayableAsImage() {
-        Image thumbnail = getThumbnail();
-        return Objects.nonNull(thumbnail) && thumbnail.errorProperty().get() == false;
-    }
-
     @Nonnull
     public Set<String> getHashSetNamesUnchecked() {
         try {

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/ImageFile.java

@@ -28,6 +28,7 @@ import javafx.scene.image.Image;
 import javax.imageio.ImageIO;
 import org.sleuthkit.autopsy.coreutils.ImageUtils;
 import org.sleuthkit.autopsy.coreutils.Logger;
+import org.sleuthkit.autopsy.imagegallery.ThumbnailCache;
 import org.sleuthkit.datamodel.AbstractFile;
 
 /**
@@ -48,6 +49,34 @@ public class ImageFile<T extends AbstractFile> extends DrawableFile<T> {
 
     }
 
+    @Override
+    public Task<Image> getThumbnailTask() {
+        return ThumbnailCache.getDefault().getThumbnailTask(this);
+//            newGetThumbTask.stateProperty().addListener((Observable observable) -> {
+//                switch (newGetThumbTask.getState()) {
+//                    case CANCELLED:
+//                        break;
+//                    case FAILED:
+//                        break;
+//                    case SUCCEEDED:
+//                        try {
+//                            thumbref = new SoftReference<>(newGetThumbTask.get());
+//                        } catch (InterruptedException | ExecutionException interruptedException) {
+//                        }
+//                        break;
+//                }
+//            });
+//            return newGetThumbTask;
+//        } else {
+//            return new Task<Image>() {
+//                @Override
+//                protected Image call() throws Exception {
+//                    return thumbnail;
+//                }
+//            };
+//        }
+    }
+
     @Override
     public Task<Image> getReadFullSizeImageTask() {
         Image image = (imageRef != null) ? imageRef.get() : null;

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/VideoFile.java

@@ -24,9 +24,7 @@ import java.io.File;
 import java.io.IOException;
 import java.lang.ref.SoftReference;
 import java.nio.file.Paths;
-import java.util.Objects;
 import java.util.concurrent.ExecutionException;
-import java.util.logging.Level;
 import javafx.beans.Observable;
 import javafx.concurrent.Task;
 import javafx.embed.swing.SwingFXUtils;
@@ -36,9 +34,9 @@ import javafx.scene.media.MediaException;
 import org.netbeans.api.progress.ProgressHandle;
 import org.netbeans.api.progress.ProgressHandleFactory;
 import org.sleuthkit.autopsy.coreutils.ImageUtils;
-import org.sleuthkit.autopsy.coreutils.Logger;
 import org.sleuthkit.autopsy.coreutils.VideoUtils;
 import org.sleuthkit.autopsy.datamodel.ContentUtils;
+import org.sleuthkit.autopsy.imagegallery.ThumbnailCache;
 import org.sleuthkit.datamodel.AbstractFile;
 
 public class VideoFile<T extends AbstractFile> extends DrawableFile<T> {
@@ -53,6 +51,12 @@ public class VideoFile<T extends AbstractFile> extends DrawableFile<T> {
         return VIDEO_ICON;
     }
 
+    @Override
+    public Task<Image> getThumbnailTask() {
+        return ThumbnailCache.getDefault().getThumbnailTask(VideoFile.this);
+
+    }
+
     @Override
     public Task<Image> getReadFullSizeImageTask() {
         Image image = (imageRef != null) ? imageRef.get() : null;
@@ -61,7 +65,7 @@ public class VideoFile<T extends AbstractFile> extends DrawableFile<T> {
 
                 @Override
                 protected Image call() throws Exception {
-                    final BufferedImage bufferedImage = (BufferedImage) ImageUtils.getThumbnail(getAbstractFile(), 1024);
+                    final BufferedImage bufferedImage = ImageUtils.getThumbnail(getAbstractFile(), 1024);
                     return (bufferedImage == ImageUtils.getDefaultThumbnail())
                             ? null
                             : SwingFXUtils.toFXImage(bufferedImage, null);
@@ -119,18 +123,6 @@ public class VideoFile<T extends AbstractFile> extends DrawableFile<T> {
 
     }
 
-    public boolean isDisplayableAsMedia() {
-        try {
-            Media media = getMedia();
-            return Objects.nonNull(media) && Objects.isNull(media.getError());
-        } catch (IOException ex) {
-            Logger.getLogger(VideoFile.class.getName()).log(Level.SEVERE, "failed to write video to cache for playback.", ex);
-            return false;
-        } catch (MediaException ex) {
-            return false;
-        }
-    }
-
     @Override
     Double getWidth() {
         try {

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/DrawableTile.fxml

@@ -34,11 +34,6 @@
                                         <Insets bottom="1.0" left="1.0" right="1.0" top="1.0" fx:id="x1" />
                                     </HBox.margin>
                                 </ImageView>
-                        <ImageView fx:id="undisplayableImageView" fitHeight="16.0" fitWidth="16.0" pickOnBounds="true" preserveRatio="true">
-                           <image>
-                              <Image url="@../../images/prohibition.png" />
-                           </image>
-                        </ImageView>
                             </children>
                             <padding>
                                 <Insets bottom="2.0" right="2.0" top="2.0" />

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/DrawableTile.java

@@ -21,6 +21,7 @@ package org.sleuthkit.autopsy.imagegallery.gui.drawableviews;
 import java.util.Objects;
 import java.util.logging.Level;
 import javafx.application.Platform;
+import javafx.concurrent.Task;
 import javafx.fxml.FXML;
 import javafx.scene.CacheHint;
 import javafx.scene.control.Control;
@@ -90,8 +91,8 @@ public class DrawableTile extends DrawableTileBase {
     }
 
     @Override
-    CachedLoaderTask<Image, DrawableFile<?>> newReadImageTask(DrawableFile<?> file) {
+    Task<Image> newReadImageTask(DrawableFile<?> file) {
-        return new ThumbnailLoaderTask(file);
+        return file.getThumbnailTask();
     }
 
     @Override

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/DrawableTileBase.java

@@ -71,7 +71,6 @@ import org.sleuthkit.autopsy.imagegallery.actions.OpenExternalViewerAction;
 import org.sleuthkit.autopsy.imagegallery.actions.SwingMenuItemAdapter;
 import org.sleuthkit.autopsy.imagegallery.datamodel.DrawableAttribute;
 import org.sleuthkit.autopsy.imagegallery.datamodel.DrawableFile;
-import org.sleuthkit.autopsy.imagegallery.datamodel.VideoFile;
 import org.sleuthkit.autopsy.imagegallery.datamodel.grouping.GroupViewMode;
 import org.sleuthkit.datamodel.ContentTag;
 import org.sleuthkit.datamodel.TagName;
@@ -112,8 +111,7 @@ public abstract class DrawableTileBase extends DrawableUIBase {
     @FXML
     private ImageView hashHitImageView;
 
-    @FXML
+
-    protected ImageView undisplayableImageView;
     /**
      * displays the icon representing follow up tag
      */
@@ -316,7 +314,7 @@ public abstract class DrawableTileBase extends DrawableUIBase {
         getFile().ifPresent(file -> {
             final boolean isVideo = file.isVideo();
             final boolean hasHashSetHits = hasHashHit();
-            final boolean isUndisplayable = (isVideo ? ((VideoFile<?>) file).isDisplayableAsMedia() : file.isDisplayableAsImage()) == false;
+     
             final String text = getTextForLabel();
 
             Platform.runLater(() -> {
@@ -324,8 +322,7 @@ public abstract class DrawableTileBase extends DrawableUIBase {
                 fileTypeImageView.setVisible(isVideo);
                 hashHitImageView.setManaged(hasHashSetHits);
                 hashHitImageView.setVisible(hasHashSetHits);
-                undisplayableImageView.setManaged(isUndisplayable);
+        
-                undisplayableImageView.setVisible(isUndisplayable);
                 nameLabel.setText(text);
                 nameLabel.setTooltip(new Tooltip(text));
             });

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/DrawableUIBase.java

@@ -56,7 +56,7 @@ import org.sleuthkit.datamodel.TskCoreException;
 @NbBundle.Messages({"MediaViewImagePanel.errorLabel.text=Could not load file."})
 abstract public class DrawableUIBase extends AnchorPane implements DrawableView {
 
-    static final Executor exec = Executors.newWorkStealingPool();
+    static final Executor exec = Executors.newSingleThreadExecutor();
 
     private static final Logger LOGGER = Logger.getLogger(DrawableUIBase.class.getName());
 
@@ -158,7 +158,7 @@ abstract public class DrawableUIBase extends AnchorPane implements DrawableView
 
     synchronized protected void disposeContent() {
         if (imageTask != null) {
-            imageTask.cancel(true);
+            imageTask.cancel();
         }
         imageTask = null;
         Platform.runLater(() -> imageView.setImage(null));
@@ -244,20 +244,20 @@ abstract public class DrawableUIBase extends AnchorPane implements DrawableView
         abstract void saveToCache(X result);
     }
 
-    class ThumbnailLoaderTask extends CachedLoaderTask<Image, DrawableFile<?>> {
+//    class ThumbnailLoaderTask extends CachedLoaderTask<Image, DrawableFile<?>> {
-
+//
-        ThumbnailLoaderTask(DrawableFile<?> file) {
+//        ThumbnailLoaderTask(DrawableFile<?> file) {
-            super(file);
+//            super(file);
-        }
+//        }
-
+//
-        @Override
+//        @Override
-        Image load() {
+//        Image load() {
-            return isCancelled() ? null : file.getThumbnail();
+//            return isCancelled() ? null : file.getThumbnail();
-        }
+//        }
-
+//
-        @Override
+//        @Override
-        void saveToCache(Image result) {
+//        void saveToCache(Image result) {
-//            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+////            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
-        }
+//        }
-    }
+//    }
 }

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/GroupPane.java

@@ -774,12 +774,10 @@ public class GroupPane extends BorderPane {
         @Override
         protected void updateItem(Long item, boolean empty) {
             super.updateItem(item, empty);
-
             tile.setFile(item);
         }
 
         void resetItem() {
-//            updateItem(null, true);
             tile.setFile(null);
         }
     }

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/MetaDataPane.java

@@ -31,6 +31,7 @@ import java.util.stream.Collectors;
 import javafx.application.Platform;
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.beans.property.SimpleStringProperty;
+import javafx.concurrent.Task;
 import javafx.fxml.FXML;
 import javafx.scene.control.ContextMenu;
 import javafx.scene.control.Label;
@@ -184,8 +185,8 @@ public class MetaDataPane extends DrawableUIBase {
     }
 
     @Override
-    CachedLoaderTask<Image, DrawableFile<?>> newReadImageTask(DrawableFile<?> file) {
+    Task<Image> newReadImageTask(DrawableFile<?> file) {
-        return new ThumbnailLoaderTask(file);
+        return file.getThumbnailTask();
     }
 
     public void updateAttributesTable() {

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/SlideShowView.fxml

@@ -55,11 +55,6 @@
                                                                 <Insets bottom="1.0" left="1.0" right="1.0" top="1.0" />
                                                             </HBox.margin>
                                                         </ImageView>
-                                          <ImageView fx:id="undisplayableImageView" fitHeight="16.0" fitWidth="16.0" pickOnBounds="true" preserveRatio="true">
-                                             <image>
-                                                <Image url="@../../images/prohibition.png" />
-                                             </image>
-                                          </ImageView>
                                                     </children>
                                                     <padding>
                                                         <Insets bottom="2.0" right="2.0" top="2.0" />

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/gui/drawableviews/SlideShowView.java

@@ -331,13 +331,9 @@ public class SlideShowView extends DrawableTileBase {
                     Logger.getLogger(VideoFile.class.getName()).log(Level.WARNING, "Failed to initialize VideoPlayer for file {0} : {1}", new Object[]{file.getName(), ex.getLocalizedMessage()});
                 }
 
-                if (file.isDisplayableAsImage()) {
+              
                     return doReadImageTask(file);
-                }
+                          }
-
-                //if we couldn't even show it as an image. rethrow exception.
-                throw ex;
-            }
         }
     }
 }