javafx.scene.image.Image Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
package javafx.scene.image;
import java.io.InputStream;
import java.lang.ref.WeakReference;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.CancellationException;
import java.util.regex.Pattern;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Platform;
import javafx.beans.NamedArg;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.beans.property.ReadOnlyDoubleProperty;
import javafx.beans.property.ReadOnlyDoublePropertyBase;
import javafx.beans.property.ReadOnlyDoubleWrapper;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectPropertyBase;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.scene.paint.Color;
import javafx.util.Duration;
import com.sun.javafx.runtime.async.AsyncOperation;
import com.sun.javafx.runtime.async.AsyncOperationListener;
import com.sun.javafx.tk.ImageLoader;
import com.sun.javafx.tk.PlatformImage;
import com.sun.javafx.tk.Toolkit;
import javafx.animation.Interpolator;
import javafx.animation.KeyValue;
import javafx.beans.property.SimpleIntegerProperty;
/**
* The {@code Image} class represents graphical images and is used for loading
* images from a specified URL.
*
*
* Supported image formats are:
*
*
*
*
* Images can be resized as they are loaded (for example to reduce the amount of
* memory consumed by the image). The application can specify the quality of
* filtering used when scaling, and whether or not to preserve the original
* image's aspect ratio.
*
*
*
* All URLs supported by {@link URL} can be passed to the constructor.
* If the passed string is not a valid URL, but a path instead, the Image is
* searched on the classpath in that case.
*
*
* Use {@link ImageView} for displaying images loaded with this
* class. The same {@code Image} instance can be displayed by multiple
* {@code ImageView}s.
*
*Example code for loading images.
import javafx.scene.image.Image;
// load an image in background, displaying a placeholder while it's loading
// (assuming there's an ImageView node somewhere displaying this image)
// The image is located in default package of the classpath
Image image1 = new Image("/flower.png", true);
// load an image and resize it to 100x150 without preserving its original
// aspect ratio
// The image is located in my.res package of the classpath
Image image2 = new Image("my/res/flower.png", 100, 150, false, false);
// load an image and resize it to width of 100 while preserving its
// original aspect ratio, using faster filtering method
// The image is downloaded from the supplied URL through http protocol
Image image3 = new Image("http://sample.com/res/flower.png", 100, 0, false, false);
// load an image and resize it only in one dimension, to the height of 100 and
// the original width, without preserving original aspect ratio
// The image is located in the current working directory
Image image4 = new Image("file:flower.png", 0, 100, false, false);
* @since JavaFX 2.0
*/
public class Image {
static {
Toolkit.setImageAccessor(new Toolkit.ImageAccessor() {
@Override
public boolean isAnimation(Image image) {
return image.isAnimation();
}
@Override
public ReadOnlyObjectProperty
getImageProperty(Image image)
{
return image.acc_platformImageProperty();
}
@Override
public int[] getPreColors(PixelFormat pf) {
return ((PixelFormat.IndexedPixelFormat) pf).getPreColors();
}
@Override
public int[] getNonPreColors(PixelFormat pf) {
return ((PixelFormat.IndexedPixelFormat) pf).getNonPreColors();
}
@Override
public Object getPlatformImage(Image image) {
return image.getPlatformImage();
}
@Override
public Image fromPlatformImage(Object image) {
return Image.fromPlatformImage(image);
}
});
}
// Matches strings that start with a valid URI scheme
private static final Pattern URL_QUICKMATCH = Pattern.compile("^\\p{Alpha}[\\p{Alnum}+.-]*:.*$");
/**
* The string representing the URL to use in fetching the pixel data.
*
* @defaultValue empty string
*/
private final String url;
/**
* Returns the url used to fetch the pixel data contained in the Image instance,
* if specified in the constructor. If no url is provided in the constructor (for
* instance, if the Image is constructed from an
* {@link #Image(InputStream) InputStream}), this method will return null.
*
* @return a String containing the URL used to fetch the pixel data for this
* Image instance.
* @since 9
*/
public final String getUrl() {
return url;
}
private final InputStream inputSource;
final InputStream getInputSource() {
return inputSource;
}
/**
* The approximate percentage of image's loading that
* has been completed. A positive value between 0 and 1 where 0 is 0% and 1
* is 100%.
*
* @defaultValue 0
*/
private ReadOnlyDoubleWrapper progress;
/**
* This is package private *only* for the sake of testing. We need a way to feed fake progress
* values. It would be better if Image were refactored to be testable (for example, by allowing
* the test code to provide its own implementation of background loading), but this is a simpler
* and safer change for now.
*
* @param value should be 0-1.
*/
final void setProgress(double value) {
progressPropertyImpl().set(value);
}
public final double getProgress() {
return progress == null ? 0.0 : progress.get();
}
public final ReadOnlyDoubleProperty progressProperty() {
return progressPropertyImpl().getReadOnlyProperty();
}
private ReadOnlyDoubleWrapper progressPropertyImpl() {
if (progress == null) {
progress = new ReadOnlyDoubleWrapper(this, "progress");
}
return progress;
}
// PENDING_DOC_REVIEW
/**
* The width of the bounding box within which the source image is
* resized as necessary to fit. If set to a value {@code <= 0}, then the
* intrinsic width of the image will be used.
*
* See {@link #isPreserveRatio() preserveRatio} for information on interaction between image's
* {@code requestedWidth}, {@code requestedHeight} and {@code preserveRatio}
* attributes.
*
* @defaultValue 0
*/
private final double requestedWidth;
/**
* Gets the width of the bounding box within which the source image is
* resized as necessary to fit. If set to a value {@code <= 0}, then the
* intrinsic width of the image will be used.
*
* See {@link #isPreserveRatio() preserveRatio} for information on interaction between image's
* {@code requestedWidth}, {@code requestedHeight} and {@code preserveRatio}
* attributes.
*
* @return The requested width
*/
public final double getRequestedWidth() {
return requestedWidth;
}
// PENDING_DOC_REVIEW
/**
* The height of the bounding box within which the source image is
* resized as necessary to fit. If set to a value {@code <= 0}, then the
* intrinsic height of the image will be used.
*
* See {@link #isPreserveRatio() preserveRatio} for information on interaction between image's
* {@code requestedWidth}, {@code requestedHeight} and {@code preserveRatio}
* attributes.
*
* @defaultValue 0
*/
private final double requestedHeight;
/**
* Gets the height of the bounding box within which the source image is
* resized as necessary to fit. If set to a value {@code <= 0}, then the
* intrinsic height of the image will be used.
*
* See {@link #isPreserveRatio() preserveRatio} for information on interaction between image's
* {@code requestedWidth}, {@code requestedHeight} and {@code preserveRatio}
* attributes.
*
* @return The requested height
*/
public final double getRequestedHeight() {
return requestedHeight;
}
// PENDING_DOC_REVIEW
/**
* The image width or {@code 0} if the image loading fails. While the image
* is being loaded it is set to {@code 0}.
*/
private DoublePropertyImpl width;
public final double getWidth() {
return width == null ? 0.0 : width.get();
}
public final ReadOnlyDoubleProperty widthProperty() {
return widthPropertyImpl();
}
private DoublePropertyImpl widthPropertyImpl() {
if (width == null) {
width = new DoublePropertyImpl("width");
}
return width;
}
private final class DoublePropertyImpl extends ReadOnlyDoublePropertyBase {
private final String name;
private double value;
public DoublePropertyImpl(final String name) {
this.name = name;
}
public void store(final double value) {
this.value = value;
}
@Override
public void fireValueChangedEvent() {
super.fireValueChangedEvent();
}
@Override
public double get() {
return value;
}
@Override
public Object getBean() {
return Image.this;
}
@Override
public String getName() {
return name;
}
}
// PENDING_DOC_REVIEW
/**
* The image height or {@code 0} if the image loading fails. While the image
* is being loaded it is set to {@code 0}.
*/
private DoublePropertyImpl height;
public final double getHeight() {
return height == null ? 0.0 : height.get();
}
public final ReadOnlyDoubleProperty heightProperty() {
return heightPropertyImpl();
}
private DoublePropertyImpl heightPropertyImpl() {
if (height == null) {
height = new DoublePropertyImpl("height");
}
return height;
}
/**
* Indicates whether to preserve the aspect ratio of the original image
* when scaling to fit the image within the bounding box provided by
* {@code width} and {@code height}.
*
* If set to {@code true}, it affects the dimensions of this {@code Image}
* in the following way:
*
* - If only {@code width} is set, height is scaled to preserve ratio
*
- If only {@code height} is set, width is scaled to preserve ratio
*
- If both are set, they both may be scaled to get the best fit in a
* width by height rectangle while preserving the original aspect ratio
*
* The reported {@code width} and {@code height} may be different from the
* initially set values if they needed to be adjusted to preserve aspect
* ratio.
*
* If unset or set to {@code false}, it affects the dimensions of this
* {@code ImageView} in the following way:
*
* - If only {@code width} is set, the image's width is scaled to
* match and height is unchanged;
*
- If only {@code height} is set, the image's height is scaled to
* match and height is unchanged;
*
- If both are set, the image is scaled to match both.
*
*
* @defaultValue false
*/
private final boolean preserveRatio;
/**
* Indicates whether to preserve the aspect ratio of the original image
* when scaling to fit the image within the bounding box provided by
* {@code width} and {@code height}.
*
* If set to {@code true}, it affects the dimensions of this {@code Image}
* in the following way:
*
* - If only {@code width} is set, height is scaled to preserve ratio
*
- If only {@code height} is set, width is scaled to preserve ratio
*
- If both are set, they both may be scaled to get the best fit in a
* width by height rectangle while preserving the original aspect ratio
*
* The reported {@code width} and {@code height} may be different from the
* initially set values if they needed to be adjusted to preserve aspect
* ratio.
*
* If unset or set to {@code false}, it affects the dimensions of this
* {@code ImageView} in the following way:
*
* - If only {@code width} is set, the image's width is scaled to
* match and height is unchanged;
*
- If only {@code height} is set, the image's height is scaled to
* match and height is unchanged;
*
- If both are set, the image is scaled to match both.
*
*
* @return true if the aspect ratio of the original image is to be
* preserved when scaling to fit the image within the bounding
* box provided by {@code width} and {@code height}.
*/
public final boolean isPreserveRatio() {
return preserveRatio;
}
/**
* Indicates whether to use a better quality filtering algorithm or a faster
* one when scaling this image to fit within the
* bounding box provided by {@code width} and {@code height}.
*
*
* If not initialized or set to {@code true} a better quality filtering
* will be used, otherwise a faster but lesser quality filtering will be
* used.
*
*
* @defaultValue true
*/
private final boolean smooth;
/**
* Indicates whether to use a better quality filtering algorithm or a faster
* one when scaling this image to fit within the
* bounding box provided by {@code width} and {@code height}.
*
*
* If not initialized or set to {@code true} a better quality filtering
* will be used, otherwise a faster but lesser quality filtering will be
* used.
*
*
* @return true if a better quality (but slower) filtering algorithm
* is used for scaling to fit within the
* bounding box provided by {@code width} and {@code height}.
*/
public final boolean isSmooth() {
return smooth;
}
/**
* Indicates whether the image is being loaded in the background.
*
* @defaultValue false
*/
private final boolean backgroundLoading;
/**
* Indicates whether the image is being loaded in the background.
* @return true if the image is loaded in the background
*/
public final boolean isBackgroundLoading() {
return backgroundLoading;
}
/**
* Indicates whether an error was detected while loading an image.
*
* @defaultValue false
*/
private ReadOnlyBooleanWrapper error;
private void setError(boolean value) {
errorPropertyImpl().set(value);
}
public final boolean isError() {
return error == null ? false : error.get();
}
public final ReadOnlyBooleanProperty errorProperty() {
return errorPropertyImpl().getReadOnlyProperty();
}
private ReadOnlyBooleanWrapper errorPropertyImpl() {
if (error == null) {
error = new ReadOnlyBooleanWrapper(this, "error");
}
return error;
}
/**
* The exception which caused image loading to fail. Contains a non-null
* value only if the {@code error} property is set to {@code true}.
*
* @since JavaFX 8.0
*/
private ReadOnlyObjectWrapper exception;
private void setException(Exception value) {
exceptionPropertyImpl().set(value);
}
public final Exception getException() {
return exception == null ? null : exception.get();
}
public final ReadOnlyObjectProperty exceptionProperty() {
return exceptionPropertyImpl().getReadOnlyProperty();
}
private ReadOnlyObjectWrapper exceptionPropertyImpl() {
if (exception == null) {
exception = new ReadOnlyObjectWrapper(this, "exception");
}
return exception;
}
/*
* The underlying platform representation of this Image object.
*
* @defaultValue null
*/
private ObjectPropertyImpl platformImage;
final Object getPlatformImage() {
return platformImage == null ? null : platformImage.get();
}
final ReadOnlyObjectProperty acc_platformImageProperty() {
return platformImagePropertyImpl();
}
private ObjectPropertyImpl platformImagePropertyImpl() {
if (platformImage == null) {
platformImage = new ObjectPropertyImpl("platformImage");
}
return platformImage;
}
void pixelsDirty() {
platformImagePropertyImpl().fireValueChangedEvent();
}
private final class ObjectPropertyImpl
extends ReadOnlyObjectPropertyBase {
private final String name;
private T value;
private boolean valid = true;
public ObjectPropertyImpl(final String name) {
this.name = name;
}
public void store(final T value) {
this.value = value;
}
public void set(final T value) {
if (this.value != value) {
this.value = value;
markInvalid();
}
}
@Override
public void fireValueChangedEvent() {
super.fireValueChangedEvent();
}
private void markInvalid() {
if (valid) {
valid = false;
fireValueChangedEvent();
}
}
@Override
public T get() {
valid = true;
return value;
}
@Override
public Object getBean() {
return Image.this;
}
@Override
public String getName() {
return name;
}
}
/**
* Constructs an {@code Image} with content loaded from the specified
* url.
*
* @param url the string representing the URL to use in fetching the pixel
* data
* @throws NullPointerException if URL is null
* @throws IllegalArgumentException if URL is invalid or unsupported
*/
public Image(@NamedArg("url") String url) {
this(validateUrl(url), null, 0, 0, false, false, false);
initialize(null);
}
/**
* Constructs a new {@code Image} with the specified parameters.
*
* @param url the string representing the URL to use in fetching the pixel
* data
* @param backgroundLoading indicates whether the image
* is being loaded in the background
* @throws NullPointerException if URL is null
* @throws IllegalArgumentException if URL is invalid or unsupported
*/
public Image(@NamedArg("url") String url, @NamedArg("backgroundLoading") boolean backgroundLoading) {
this(validateUrl(url), null, 0, 0, false, false, backgroundLoading);
initialize(null);
}
/**
* Constructs a new {@code Image} with the specified parameters.
*
* @param url the string representing the URL to use in fetching the pixel
* data
* @param requestedWidth the image's bounding box width
* @param requestedHeight the image's bounding box height
* @param preserveRatio indicates whether to preserve the aspect ratio of
* the original image when scaling to fit the image within the
* specified bounding box
* @param smooth indicates whether to use a better quality filtering
* algorithm or a faster one when scaling this image to fit within
* the specified bounding box
* @throws NullPointerException if URL is null
* @throws IllegalArgumentException if URL is invalid or unsupported
*/
public Image(@NamedArg("url") String url, @NamedArg("requestedWidth") double requestedWidth, @NamedArg("requestedHeight") double requestedHeight,
@NamedArg("preserveRatio") boolean preserveRatio, @NamedArg("smooth") boolean smooth) {
this(validateUrl(url), null, requestedWidth, requestedHeight,
preserveRatio, smooth, false);
initialize(null);
}
/**
* Constructs a new {@code Image} with the specified parameters.
*
* The url without scheme is threated as relative to classpath,
* url with scheme is treated accordingly to the scheme using
* {@link URL#openStream()}
*
* @param url the string representing the URL to use in fetching the pixel
* data
* @param requestedWidth the image's bounding box width
* @param requestedHeight the image's bounding box height
* @param preserveRatio indicates whether to preserve the aspect ratio of
* the original image when scaling to fit the image within the
* specified bounding box
* @param smooth indicates whether to use a better quality filtering
* algorithm or a faster one when scaling this image to fit within
* the specified bounding box
* @param backgroundLoading indicates whether the image
* is being loaded in the background
* @throws NullPointerException if URL is null
* @throws IllegalArgumentException if URL is invalid or unsupported
*/
public Image(
@NamedArg(value="url", defaultValue="\"\"") String url,
@NamedArg("requestedWidth") double requestedWidth,
@NamedArg("requestedHeight") double requestedHeight,
@NamedArg("preserveRatio") boolean preserveRatio,
@NamedArg(value="smooth", defaultValue="true") boolean smooth,
@NamedArg("backgroundLoading") boolean backgroundLoading) {
this(validateUrl(url), null, requestedWidth, requestedHeight,
preserveRatio, smooth, backgroundLoading);
initialize(null);
}
/**
* Constructs an {@code Image} with content loaded from the specified
* input stream.
*
* @param is the stream from which to load the image
* @throws NullPointerException if input stream is null
*/
public Image(@NamedArg("is") InputStream is) {
this(null, validateInputStream(is), 0, 0, false, false, false);
initialize(null);
}
/**
* Constructs a new {@code Image} with the specified parameters.
*
* @param is the stream from which to load the image
* @param requestedWidth the image's bounding box width
* @param requestedHeight the image's bounding box height
* @param preserveRatio indicates whether to preserve the aspect ratio of
* the original image when scaling to fit the image within the
* specified bounding box
* @param smooth indicates whether to use a better quality filtering
* algorithm or a faster one when scaling this image to fit within
* the specified bounding box
* @throws NullPointerException if input stream is null
*/
public Image(@NamedArg("is") InputStream is, @NamedArg("requestedWidth") double requestedWidth, @NamedArg("requestedHeight") double requestedHeight,
@NamedArg("preserveRatio") boolean preserveRatio, @NamedArg("smooth") boolean smooth) {
this(null, validateInputStream(is), requestedWidth, requestedHeight,
preserveRatio, smooth, false);
initialize(null);
}
/**
* Package private internal constructor used only by {@link WritableImage}.
* The dimensions must both be positive numbers (> 0).
*
* @param width the width of the empty image
* @param height the height of the empty image
* @throws IllegalArgumentException if either dimension is negative or zero.
*/
Image(int width, int height) {
this(null, null, width, height, false, false, false);
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException("Image dimensions must be positive (w,h > 0)");
}
initialize(Toolkit.getToolkit().createPlatformImage(width, height));
}
/**
* Package private internal constructor used only by {@code WritableImage}.
*
* @param pixelBuffer the {@code PixelBuffer} used to construct this image.
*/
Image(PixelBuffer pixelBuffer) {
this(null, null, pixelBuffer.getWidth(), pixelBuffer.getHeight(),
false, false, false);
initialize(pixelBuffer); // Creates an image using the java.nio.Buffer provided by PixelBuffer.
}
private Image(Object externalImage) {
this(null, null, 0, 0, false, false, false);
initialize(externalImage);
}
private Image(String url, InputStream is,
double requestedWidth, double requestedHeight,
boolean preserveRatio, boolean smooth,
boolean backgroundLoading) {
this.url = url;
this.inputSource = is;
this.requestedWidth = requestedWidth;
this.requestedHeight = requestedHeight;
this.preserveRatio = preserveRatio;
this.smooth = smooth;
this.backgroundLoading = backgroundLoading;
}
/**
* Cancels the background loading of this image.
*
* Has no effect if this image isn't loaded in background or if loading
* has already completed.
*/
public void cancel() {
if (backgroundTask != null) {
backgroundTask.cancel();
}
}
/*
* used for testing
*/
void dispose() {
cancel();
Platform.runLater(() -> {
if (animation != null) {
animation.stop();
}
});
}
private ImageTask backgroundTask;
private void initialize(Object externalImage) {
// we need to check the original values here, because setting placeholder
// changes platformImage, so wrong branch of if would be used
if (externalImage != null) {
// Make an image from the provided platform-specific image
// object (e.g. a BufferedImage in the case of the Swing profile)
ImageLoader loader = loadPlatformImage(externalImage);
finishImage(loader);
} else if (isBackgroundLoading() && (inputSource == null)) {
// Load image in the background.
loadInBackground();
} else {
// Load image immediately.
ImageLoader loader;
if (inputSource != null) {
loader = loadImage(inputSource, getRequestedWidth(), getRequestedHeight(),
isPreserveRatio(), isSmooth());
} else {
loader = loadImage(getUrl(), getRequestedWidth(), getRequestedHeight(),
isPreserveRatio(), isSmooth());
}
finishImage(loader);
}
}
private void finishImage(ImageLoader loader) {
final Exception loadingException = loader.getException();
if (loadingException != null) {
finishImage(loadingException);
return;
}
if (loader.getFrameCount() > 1) {
initializeAnimatedImage(loader);
} else {
PlatformImage pi = loader.getFrame(0);
double w = loader.getWidth() / pi.getPixelScale();
double h = loader.getHeight() / pi.getPixelScale();
setPlatformImageWH(pi, w, h);
}
setProgress(1);
}
private void finishImage(Exception exception) {
setException(exception);
setError(true);
setPlatformImageWH(null, 0, 0);
setProgress(1);
}
// Support for animated images.
private Animation animation;
private volatile boolean isAnimated;
// We keep the animation frames associated with the Image rather than with
// the animation, so most of the data can be garbage collected while
// the animation is still running.
private PlatformImage[] animFrames;
// Generates the animation Timeline for multiframe images.
private void initializeAnimatedImage(ImageLoader loader) {
final int frameCount = loader.getFrameCount();
animFrames = new PlatformImage[frameCount];
for (int i = 0; i < frameCount; ++i) {
animFrames[i] = loader.getFrame(i);
}
PlatformImage zeroFrame = loader.getFrame(0);
double w = loader.getWidth() / zeroFrame.getPixelScale();
double h = loader.getHeight() / zeroFrame.getPixelScale();
setPlatformImageWH(zeroFrame, w, h);
isAnimated = true;
Platform.runLater(() -> {
animation = new Animation(this, loader);
animation.start();
});
}
private static final class Animation {
final WeakReference imageRef;
final Timeline timeline;
final SimpleIntegerProperty frameIndex = new SimpleIntegerProperty() {
@Override
protected void invalidated() {
updateImage(get());
}
};
public Animation(final Image image, final ImageLoader loader) {
imageRef = new WeakReference(image);
timeline = new Timeline();
int loopCount = loader.getLoopCount();
timeline.setCycleCount(loopCount == 0 ? Timeline.INDEFINITE : loopCount);
final int frameCount = loader.getFrameCount();
int duration = 0;
for (int i = 0; i < frameCount; ++i) {
addKeyFrame(i, duration);
duration = duration + loader.getFrameDelay(i);
}
// Note: we need one extra frame in the timeline to define how long
// the last frame is shown, the wrap around is "instantaneous"
timeline.getKeyFrames().add(new KeyFrame(Duration.millis(duration)));
}
public void start() {
timeline.play();
}
public void stop() {
timeline.stop();
}
private void updateImage(final int frameIndex) {
final Image image = imageRef.get();
if (image != null) {
image.platformImagePropertyImpl().set(
image.animFrames[frameIndex]);
} else {
timeline.stop();
}
}
private void addKeyFrame(final int index, final double duration) {
timeline.getKeyFrames().add(
new KeyFrame(Duration.millis(duration),
new KeyValue(frameIndex, index, Interpolator.DISCRETE)
));
}
}
private void cycleTasks() {
synchronized (pendingTasks) {
runningTasks--;
// do we have any pending tasks to run ?
// we can assume we are under the throttle limit because
// one task just completed.
final ImageTask nextTask = pendingTasks.poll();
if (nextTask != null) {
runningTasks++;
nextTask.start();
}
}
}
private void loadInBackground() {
backgroundTask = new ImageTask();
// This is an artificial throttle on background image loading tasks.
// It has been shown that with large images, we can quickly use up the
// heap loading images, even if they result in thumbnails.
// The limit of MAX_RUNNING_TASKS is arbitrary, and was based on initial
// testing with
// about 60 2-6 megapixel images.
synchronized (pendingTasks) {
if (runningTasks >= MAX_RUNNING_TASKS) {
pendingTasks.offer(backgroundTask);
} else {
runningTasks++;
backgroundTask.start();
}
}
}
// Used by SwingUtils.toFXImage
static Image fromPlatformImage(Object image) {
return new Image(image);
}
private void setPlatformImageWH(final PlatformImage newPlatformImage,
final double newWidth,
final double newHeight) {
if ((Toolkit.getImageAccessor().getPlatformImage(this) == newPlatformImage)
&& (getWidth() == newWidth)
&& (getHeight() == newHeight)) {
return;
}
final Object oldPlatformImage = Toolkit.getImageAccessor().getPlatformImage(this);
final double oldWidth = getWidth();
final double oldHeight = getHeight();
storePlatformImageWH(newPlatformImage, newWidth, newHeight);
if (oldPlatformImage != newPlatformImage) {
platformImagePropertyImpl().fireValueChangedEvent();
}
if (oldWidth != newWidth) {
widthPropertyImpl().fireValueChangedEvent();
}
if (oldHeight != newHeight) {
heightPropertyImpl().fireValueChangedEvent();
}
}
private void storePlatformImageWH(final PlatformImage platformImage,
final double width,
final double height) {
platformImagePropertyImpl().store(platformImage);
widthPropertyImpl().store(width);
heightPropertyImpl().store(height);
}
void setPlatformImage(PlatformImage newPlatformImage) {
platformImage.set(newPlatformImage);
}
private static final int MAX_RUNNING_TASKS = 4;
private static int runningTasks = 0;
private static final Queue pendingTasks =
new LinkedList();
private final class ImageTask
implements AsyncOperationListener {
private final AsyncOperation peer;
public ImageTask() {
peer = constructPeer();
}
@Override
public void onCancel() {
finishImage(new CancellationException("Loading cancelled"));
cycleTasks();
}
@Override
public void onException(Exception exception) {
finishImage(exception);
cycleTasks();
}
@Override
public void onCompletion(ImageLoader value) {
finishImage(value);
cycleTasks();
}
@Override
public void onProgress(int cur, int max) {
if (max > 0) {
double curProgress = (double) cur / max;
if ((curProgress < 1) && (curProgress >= (getProgress() + 0.1))) {
setProgress(curProgress);
}
}
}
public void start() {
peer.start();
}
public void cancel() {
peer.cancel();
}
private AsyncOperation constructPeer() {
return loadImageAsync(this, url,
requestedWidth, requestedHeight,
preserveRatio, smooth);
}
}
private static ImageLoader loadImage(
String url, double width, double height,
boolean preserveRatio, boolean smooth) {
return Toolkit.getToolkit().loadImage(url, width, height,
preserveRatio, smooth);
}
private static ImageLoader loadImage(
InputStream stream, double width, double height,
boolean preserveRatio, boolean smooth) {
return Toolkit.getToolkit().loadImage(stream, width, height,
preserveRatio, smooth);
}
private static AsyncOperation loadImageAsync(
AsyncOperationListener listener,
String url, double width, double height,
boolean preserveRatio, boolean smooth) {
return Toolkit.getToolkit().loadImageAsync(listener, url,
width, height,
preserveRatio, smooth);
}
private static ImageLoader loadPlatformImage(Object platformImage) {
return Toolkit.getToolkit().loadPlatformImage(platformImage);
}
private static String validateUrl(final String url) {
if (url == null) {
throw new NullPointerException("URL must not be null");
}
if (url.trim().isEmpty()) {
throw new IllegalArgumentException("URL must not be empty");
}
try {
if (!URL_QUICKMATCH.matcher(url).matches()) {
final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
URL resource;
if (url.charAt(0) == '/') {
// FIXME: JIGSAW -- use Class.getResourceAsStream if resource is in a module
resource = contextClassLoader.getResource(url.substring(1));
} else {
// FIXME: JIGSAW -- use Class.getResourceAsStream if resource is in a module
resource = contextClassLoader.getResource(url);
}
if (resource == null) {
throw new IllegalArgumentException("Invalid URL or resource not found");
}
return resource.toString();
}
// Use URL constructor for validation
return new URL(url).toString();
} catch (final IllegalArgumentException e) {
throw new IllegalArgumentException(
constructDetailedExceptionMessage("Invalid URL", e), e);
} catch (final MalformedURLException e) {
throw new IllegalArgumentException(
constructDetailedExceptionMessage("Invalid URL", e), e);
}
}
private static InputStream validateInputStream(
final InputStream inputStream) {
if (inputStream == null) {
throw new NullPointerException("Input stream must not be null");
}
return inputStream;
}
private static String constructDetailedExceptionMessage(
final String mainMessage,
final Throwable cause) {
if (cause == null) {
return mainMessage;
}
final String causeMessage = cause.getMessage();
return constructDetailedExceptionMessage(
(causeMessage != null)
? mainMessage + ": " + causeMessage
: mainMessage,
cause.getCause());
}
/**
* Indicates whether image is animated.
*/
boolean isAnimation() {
return isAnimated;
}
boolean pixelsReadable() {
return (getProgress() >= 1.0 && !isAnimation() && !isError());
}
private PixelReader reader;
/**
* This method returns a {@code PixelReader} that provides access to
* read the pixels of the image, if the image is readable.
* If this method returns null then this image does not support reading
* at this time.
* This method will return null if the image is being loaded from a
* source and is still incomplete {the progress is still <1.0) or if
* there was an error.
* This method may also return null for some images in a format that
* is not supported for reading and writing pixels to.
*
* @return the {@code PixelReader} for reading the pixel data of the image
* @since JavaFX 2.2
*/
public final PixelReader getPixelReader() {
if (!pixelsReadable()) {
return null;
}
if (reader == null) {
reader = new PixelReader() {
@Override
public PixelFormat getPixelFormat() {
PlatformImage pimg = platformImage.get();
return pimg.getPlatformPixelFormat();
}
@Override
public int getArgb(int x, int y) {
PlatformImage pimg = platformImage.get();
return pimg.getArgb(x, y);
}
@Override
public Color getColor(int x, int y) {
int argb = getArgb(x, y);
int a = argb >>> 24;
int r = (argb >> 16) & 0xff;
int g = (argb >> 8) & 0xff;
int b = (argb ) & 0xff;
return Color.rgb(r, g, b, a / 255.0);
}
@Override
public
void getPixels(int x, int y, int w, int h,
WritablePixelFormat pixelformat,
T buffer, int scanlineStride)
{
PlatformImage pimg = platformImage.get();
pimg.getPixels(x, y, w, h, pixelformat,
buffer, scanlineStride);
}
@Override
public void getPixels(int x, int y, int w, int h,
WritablePixelFormat pixelformat,
byte buffer[], int offset, int scanlineStride)
{
PlatformImage pimg = platformImage.get();
pimg.getPixels(x, y, w, h, pixelformat,
buffer, offset, scanlineStride);
}
@Override
public void getPixels(int x, int y, int w, int h,
WritablePixelFormat pixelformat,
int buffer[], int offset, int scanlineStride)
{
PlatformImage pimg = platformImage.get();
pimg.getPixels(x, y, w, h, pixelformat,
buffer, offset, scanlineStride);
}
};
}
return reader;
}
PlatformImage getWritablePlatformImage() {
PlatformImage pimg = platformImage.get();
if (!pimg.isWritable()) {
pimg = pimg.promoteToWritableImage();
// assert pimg.isWritable();
platformImage.set(pimg);
}
return pimg;
}
}