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/*
* Copyright (c) 2011, 2022, Oracle and/or its affiliates. All rights reserved.
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.javafx.webkit.prism;
import com.sun.javafx.iio.ImageFrame;
import com.sun.javafx.iio.ImageLoadListener;
import com.sun.javafx.iio.ImageLoader;
import com.sun.javafx.iio.ImageMetadata;
import com.sun.javafx.iio.ImageStorage;
import com.sun.javafx.iio.ImageStorageException;
import com.sun.javafx.logging.PlatformLogger;
import com.sun.javafx.logging.PlatformLogger.Level;
import com.sun.webkit.graphics.WCGraphicsManager;
import com.sun.webkit.graphics.WCImage;
import com.sun.webkit.graphics.WCImageDecoder;
import com.sun.webkit.graphics.WCImageFrame;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
final class WCImageDecoderImpl extends WCImageDecoder {
private final static PlatformLogger log;
private Service loader;
private int imageWidth = 0;
private int imageHeight = 0;
private ImageFrame[] frames;
private int frameCount = 0; // keeps frame count when decoded frames are temporarily destroyed
private boolean fullDataReceived = false;
private boolean framesDecoded = false; // guards frames from repeated decoding
private PrismImage[] images;
private volatile byte[] data;
private volatile int dataSize = 0;
private String fileNameExtension;
static {
log = PlatformLogger.getLogger(WCImageDecoderImpl.class.getName());
}
/*
* This method is supposed to be called from ImageSource::clear() method
* when either the decoded data or the image decoder itself are to be destroyed.
* It should free all complex object on the java layer and explicitely
* destroy objects which has native resources.
*/
@Override protected synchronized void destroy() {
if (log.isLoggable(Level.FINE)) {
log.fine(String.format("%X Destroy image decoder", hashCode()));
}
destroyLoader();
frames = null;
images = null;
framesDecoded = false;
}
@Override protected String getFilenameExtension() {
return "." + fileNameExtension;
}
private boolean imageSizeAvilable() {
return imageWidth > 0 && imageHeight > 0;
}
@Override protected void addImageData(byte[] dataPortion) {
if (dataPortion != null) {
fullDataReceived = false;
if (data == null) {
data = Arrays.copyOf(dataPortion, dataPortion.length * 2);
dataSize = dataPortion.length;
} else {
int newDataSize = dataSize + dataPortion.length;
if (newDataSize > data.length) {
resizeDataArray(Math.max(newDataSize, data.length * 2));
}
System.arraycopy(dataPortion, 0, data, dataSize, dataPortion.length);
dataSize = newDataSize;
}
// Try to decode the partial data until we get image size.
if (!imageSizeAvilable()) {
loadFrames();
}
} else if (data != null && !fullDataReceived) {
// null dataPortion means data completion
if (data.length > dataSize) {
resizeDataArray(dataSize);
}
fullDataReceived = true;
}
}
private void destroyLoader() {
if (loader != null) {
loader.cancel();
loader = null;
}
}
private void startLoader() {
if (this.loader == null) {
this.loader = new Service<>() {
@Override
protected Task createTask() {
return new Task<>() {
@Override
protected ImageFrame[] call() throws Exception {
return loadFrames();
}
};
}
};
this.loader.valueProperty().addListener((ov, old, frames) -> {
if ((frames != null) && (loader != null)) {
setFrames(frames);
}
});
}
if (!this.loader.isRunning()) {
this.loader.restart();
}
}
private void resizeDataArray(int newDataSize) {
byte[] newData = new byte[newDataSize];
System.arraycopy(data, 0, newData, 0, dataSize);
data = newData;
}
@Override protected void loadFromResource(String name) {
if (log.isLoggable(Level.FINE)) {
log.fine(String.format(
"%X Load image from resource '%s'", hashCode(), name));
}
String resourceName = WCGraphicsManager.getResourceName(name);
InputStream in = getClass().getResourceAsStream(resourceName);
if (in == null) {
if (log.isLoggable(Level.FINE)) {
log.fine(String.format(
"%X Unable to open resource '%s'", hashCode(), resourceName));
}
return;
}
setFrames(loadFrames(in));
}
private synchronized ImageFrame[] loadFrames(InputStream in) {
if (log.isLoggable(Level.FINE)) {
log.fine(String.format("%X Decoding frames", hashCode()));
}
try {
return ImageStorage.getInstance().loadAll(in, readerListener, 0, 0, true, 1.0f, false);
} catch (ImageStorageException e) {
return null; // consider image missing
} finally {
try {
in.close();
} catch (IOException e) {
// ignore
}
}
}
private ImageFrame[] loadFrames() {
return loadFrames(new ByteArrayInputStream(this.data, 0, this.dataSize));
}
private final ImageLoadListener readerListener = new ImageLoadListener() {
@Override public void imageLoadProgress(ImageLoader l, float p) {
}
@Override public void imageLoadWarning(ImageLoader l, String warning) {
}
@Override public void imageLoadMetaData(ImageLoader l, ImageMetadata metadata) {
if (log.isLoggable(Level.FINE)) {
log.fine(String.format("%X Image size %dx%d",
hashCode(), metadata.imageWidth, metadata.imageHeight));
}
// The following lines is a workaround for RT-13475,
// because image decoder does not report valid image size
if (imageWidth < metadata.imageWidth) {
imageWidth = metadata.imageWidth;
}
if (imageHeight < metadata.imageHeight) {
imageHeight = metadata.imageHeight;
}
fileNameExtension = l.getFormatDescription().getExtensions().get(0);
}
};
@Override protected int[] getImageSize() {
final int[] size = THREAD_LOCAL_SIZE_ARRAY.get();
size[0] = imageWidth;
size[1] = imageHeight;
if (log.isLoggable(Level.FINE)) {
log.fine(String.format("%X image size = %dx%d", hashCode(), size[0], size[1]));
}
return size;
}
private static final class Frame extends WCImageFrame {
private WCImage image;
private Frame(WCImage image, String extension) {
this.image = image;
this.image.setFileExtension(extension);
}
@Override public WCImage getFrame() {
return image;
}
@Override public int[] getSize() {
final int[] size = THREAD_LOCAL_SIZE_ARRAY.get();
size[0] = image.getWidth();
size[1] = image.getHeight();
return size;
}
@Override protected void destroyDecodedData() {
image = null;
}
}
private synchronized void setFrames(ImageFrame[] frames) {
this.frames = frames;
this.images = null;
frameCount = frames == null ? 0 : frames.length;
}
@Override protected int getFrameCount() {
// Initiate full decode to get frame count.
// NOTE: This method will be called just before
// rendering the given image, so there will not
// be any performance degrade while initiating a
// full decode.
if (fullDataReceived) {
getImageFrame(0);
}
return frameCount;
}
// Avoid redundant decoding by async decoder threads, currently we don't
// support per frame decoding.
@Override protected synchronized WCImageFrame getFrame(int idx) {
ImageFrame frame = getImageFrame(idx);
if (frame != null) {
if (log.isLoggable(Level.FINE)) {
ImageStorage.ImageType type = frame.getImageType();
log.fine(String.format("%X getFrame(%d): image type = %s",
hashCode(), idx, type));
}
PrismImage img = getPrismImage(idx, frame);
return new Frame(img, fileNameExtension);
}
if (log.isLoggable(Level.FINE)) {
log.fine(String.format("%X FAILED getFrame(%d)", hashCode(), idx));
}
return null;
}
private synchronized ImageMetadata getFrameMetadata(int idx) {
return frames != null && frames.length > idx && frames[idx] != null ? frames[idx].getMetadata() : null;
}
@Override protected int getFrameDuration(int idx) {
final ImageMetadata meta = getFrameMetadata(idx);
int dur = (meta == null || meta.delayTime == null) ? 0 : meta.delayTime;
// Many annoying ads try to animate too fast.
// See RT-13535 or .
if (dur < 11) dur = 100;
return dur;
}
// Per thread array cache to avoid repeated creation of int[]
private static final ThreadLocal THREAD_LOCAL_SIZE_ARRAY =
new ThreadLocal<> () {
@Override protected int[] initialValue() {
return new int[2];
}
};
@Override protected int[] getFrameSize(int idx) {
final ImageMetadata meta = getFrameMetadata(idx);
if (meta == null) {
return null;
}
final int[] size = THREAD_LOCAL_SIZE_ARRAY.get();
size[0] = meta.imageWidth;
size[1] = meta.imageHeight;
return size;
}
@Override protected synchronized boolean getFrameCompleteStatus(int idx) {
// For GIF images there is no better way to find whether a given frame
// is completely decoded or not. As of now relying on framesDecoded
// which will wait for all the frames to decode.
return getFrameMetadata(idx) != null && framesDecoded;
}
private synchronized ImageFrame getImageFrame(int idx) {
if (!fullDataReceived) {
startLoader();
} else if (fullDataReceived && !framesDecoded) {
destroyLoader();
setFrames(loadFrames()); // re-decode frames if they have been destroyed
framesDecoded = true;
}
return (idx >= 0) && (this.frames != null) && (this.frames.length > idx)
? this.frames[idx]
: null;
}
private synchronized PrismImage getPrismImage(int idx, ImageFrame frame) {
if (this.images == null) {
this.images = new PrismImage[this.frames.length];
}
if (this.images[idx] == null) {
this.images[idx] = new WCImageImpl(frame);
}
return this.images[idx];
}
}
