ch.randelshofer.quaqua.osx.OSXImageIO Maven / Gradle / Ivy
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/*
* @(#)OSXImageIO.java
*
* Copyright (c) 2009-2010 Werner Randelshofer, Immensee, Switzerland.
* All rights reserved.
*
* You may not use, copy or modify this file, except in compliance with the
* license agreement you entered into with Werner Randelshofer.
* For details see accompanying license terms.
*/
package ch.randelshofer.quaqua.osx;
import ch.randelshofer.quaqua.QuaquaManager;
import ch.randelshofer.quaqua.ext.batik.ext.awt.image.codec.tiff.TIFFDecodeParam;
import ch.randelshofer.quaqua.ext.batik.ext.awt.image.codec.tiff.TIFFImageDecoder;
import ch.randelshofer.quaqua.ext.batik.ext.awt.image.codec.util.MemoryCacheSeekableStream;
import ch.randelshofer.quaqua.util.Images;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.security.AccessControlException;
/**
* {@code OSXImageIO} can read images using the Mac OS X Cocoa NSImage API.
*
* Images are read using the Cocoa class
* NSImage.
*
* @author Werner Randelshofer
* @version $Id: OSXImageIO.java 362 2010-11-21 17:35:47Z wrandelshofer $
*/
public class OSXImageIO {
private static int EXPECTED_NATIVE_CODE_VERSION = 1;
/** Prevent instance creation. */
private OSXImageIO() {
}
/**
* Reads a BufferedImage from the supplied File
* using the Cocoa NSImage API.
*/
public static BufferedImage read(File file) throws IOException {
if (!isNativeCodeAvailable()) {
throw new IOException("Native code is not available");
}
byte[] tiffData = nativeRead(file.getPath());
if (tiffData == null) {
throw new IOException("Couldn't read image from file " + file);
}
return decodeTIFF(tiffData);
}
/**
* Reads a BufferedImage scaled to the specified size
* from the supplied File using the Cocoa NSImage API.
*
* @param file
* The file containing the image.
* @param width
* The preferred width.
* @param height
* The preferred height.
*/
public static BufferedImage read(File file, int width, int height) throws IOException {
if (!isNativeCodeAvailable()) {
throw new IOException("Native code is not available");
}
byte[] tiffData = nativeRead(file.getPath(), width, height);
if (tiffData == null) {
throw new IOException("Couldn't read image from file " + file);
}
return decodeTIFF(tiffData);
}
/**
* Reads a BufferedImage from the supplied array using the
* Cocoa NSImage API.
*/
public static BufferedImage read(byte[] data) throws IOException {
if (!isNativeCodeAvailable()) {
throw new IOException("Native code is not available");
}
byte[] tiffData = nativeRead(data);
if (tiffData == null) {
throw new IOException("Couldn't read image from data array");
}
return decodeTIFF(tiffData);
}
/**
* Returns a BufferedImage as the result of decoding
* the data in the Mac OS X system clipboard using the Cocoa NSImage API.
*/
public static BufferedImage readSystemClipboard() throws IOException {
if (!isNativeCodeAvailable()) {
throw new IOException("Native code is not available");
}
byte[] tiffData = nativeReadSystemClipboard();
if (tiffData == null) {
throw new IOException("Couldn't read an image from the clipboard");
}
return decodeTIFF(tiffData);
}
/** Decodes a byte array with a TIFF encoded image. */
private static BufferedImage decodeTIFF(byte[] tiffData) throws IOException {
TIFFImageDecoder decoder = new TIFFImageDecoder(
new MemoryCacheSeekableStream(new ByteArrayInputStream(tiffData)),
new TIFFDecodeParam());
RenderedImage rImg = decoder.decodeAsRenderedImage(0);
return Images.toBufferedImage(rImg);
}
/**
* Reads an image from the specified path and returns it in a TIFF
* encoded byte array.
*/
private native static byte[] nativeRead(String path);
/**
* Reads an image from the specified path, scales it to the specified
* size and returns it in a TIFF encoded byte array.
*
* A preferred size is used if it is stored in the image file, but you
* cannot expect the resulting Image to have these dimensions.
* If your application needs a specific size, you should check the
* dimension.
*
* If JNI fails to load the image (e.g. the native code could not be
* loaded), null is returned.
*
* @param file
* The file containing the image.
* @param width
* The preferred width.
* @param height
* The preferred height.
* @return The image loaded. null, if no image could be loaded
* by JNI.
*/
private native static byte[] nativeRead(String path, int widht, int height);
/**
* Reads an image from the specified byte array, and returns it in a TIFF
* encoded byte array.
*
* @param data
* The file containing the image data.
* @return The image loaded. null, if no image could be loaded
* by JNI.
*/
private native static byte[] nativeRead(byte[] data);
/**
* Attempts to read an image from the system clipboard.
*
* @return The image loaded. null, if no image could be loaded
* from the system clipboard.
*/
private native static byte[] nativeReadSystemClipboard();
//---
/**
* Returns the version of the native code library. If the version
* does not match with the version that we expect, we can not use
* it.
* @return The version number of the native code.
*/
private static native int nativeGetNativeCodeVersion();
/**
* This variable is set to true, if native code is available.
*/
private static volatile Boolean isNativeCodeAvailable;
/**
* Returns true if native code is available.
* This method also loads the native code.
*/
public static boolean isNativeCodeAvailable() {
if (isNativeCodeAvailable == null) {
synchronized (OSXImageIO.class) {
if (isNativeCodeAvailable == null) {
boolean success = false;
try {
String value = QuaquaManager.getProperty("Quaqua.jniIsPreloaded");
if (value == null) {
value = QuaquaManager.getProperty("Quaqua.JNI.isPreloaded");
}
String libraryName = null;
if (value != null && value.equals("true")) {
success = true;
} else {
// Use quaqua64 JNI-lib on x86_64 processors on Mac OS X 10.5 and higher
libraryName = (QuaquaManager.getOS() >= QuaquaManager.LEOPARD) &&
QuaquaManager.getProperty("os.arch").equals("x86_64") ? "quaqua64" : "quaqua";
try {
System.loadLibrary(libraryName);
success = true;
} catch (UnsatisfiedLinkError e) {
System.err.println("Warning: " + OSXImageIO.class + " couldn't load library \"" + libraryName + "\". " + e);
success = false;
} catch (AccessControlException e) {
System.err.println("Warning: " + OSXImageIO.class + " access controller denied loading library \"" + libraryName + "\". " + e);
success = false;
} catch (Throwable e) {
e.printStackTrace();
System.err.println("Warning: " + OSXImageIO.class + " couldn't load library \"" + libraryName + "\". " + e);
success = false;
}
}
if (success) {
try {
int nativeCodeVersion = nativeGetNativeCodeVersion();
if (nativeCodeVersion != EXPECTED_NATIVE_CODE_VERSION) {
System.err.println("Warning: " + OSXImageIO.class + " can't use library " + libraryName + ". It has version " + nativeCodeVersion + " instead of " + EXPECTED_NATIVE_CODE_VERSION);
success = false;
}
} catch (UnsatisfiedLinkError e) {
System.err.println("Warning: " + OSXImageIO.class + " could load library " + libraryName + " but can't use it. " + e);
success = false;
}
}
} finally {
isNativeCodeAvailable = Boolean.valueOf(success);
}
}
}
}
return isNativeCodeAvailable == Boolean.TRUE;
}
}