All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.twelvemonkeys.imageio.util.IIOUtil Maven / Gradle / Ivy

There is a newer version: 3.12.0
Show newest version
/*
 * Copyright (c) 2009, Harald Kuhr
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name "TwelveMonkeys" nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.twelvemonkeys.imageio.util;

import com.twelvemonkeys.image.ImageUtil;
import com.twelvemonkeys.imageio.spi.ProviderInfo;

import javax.imageio.IIOParam;
import javax.imageio.ImageIO;
import javax.imageio.spi.IIOServiceProvider;
import javax.imageio.spi.ServiceRegistry;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.SortedSet;
import java.util.TreeSet;

/**
 * IIOUtil
 *
 * @author Harald Kuhr
 * @author last modified by $Author: haraldk$
 * @version $Id: IIOUtil.java,v 1.0 May 8, 2008 3:04:54 PM haraldk Exp$
 */
public final class IIOUtil {
    private IIOUtil() {}

    /**
     * Creates an {@code InputStream} adapter that reads from an underlying {@code ImageInputStream}.
     * The input stream will read until the end of {@code pStream}.
     *
     * @param pStream the stream to read from.
     * @return an {@code InputStream} reading from {@code pStream}.
     */
    public static InputStream createStreamAdapter(final ImageInputStream pStream) {
        // TODO: Include stream start pos?
        // TODO: Skip buffering for known in-memory implementations?
        return new BufferedInputStream(new IIOInputStreamAdapter(pStream));
    }

    /**
     * Creates an {@code InputStream} adapter that reads from an underlying {@code ImageInputStream}.
     * The input stream will read until the end of {@code pStream}, or at most {@code pLength} bytes has been read.
     *
     * @param pStream the stream to read from.
     * @param pLength the maximum number of bytes that can be read from {@code pStream}.
     * @return an {@code InputStream} reading from {@code pStream}.
     */
    public static InputStream createStreamAdapter(final ImageInputStream pStream, final long pLength) {
        // TODO: Include stream start pos?
        // TODO: Skip buffering for known in-memory implementations?
        return new BufferedInputStream(new IIOInputStreamAdapter(pStream, pLength));
    }

    /**
     * Creates an {@code OutputStream} adapter that writes to an underlying {@code ImageOutputStream}.
     * 

* Note: The adapter is buffered, and MUST be properly flushed/closed after use, * otherwise data may be lost. * * @param pStream the stream to write to. * @return an {@code OutputSteam} writing to {@code pStream}. */ public static OutputStream createStreamAdapter(final ImageOutputStream pStream) { return new BufferedOutputStream(new IIOOutputStreamAdapter(pStream)); } public static Image fakeSubsampling(final Image pImage, final IIOParam pParam) { if (pImage == null) { return null; } if (pParam != null) { int x = pParam.getSourceXSubsampling(); int y = pParam.getSourceYSubsampling(); // 1 is default if (x > 1 || y > 1) { int w = (ImageUtil.getWidth(pImage) + x - 1) / x; int h = (ImageUtil.getHeight(pImage) + y - 1) / y; // Fake subsampling by scaling fast return pImage.getScaledInstance(w, h, Image.SCALE_FAST); } } return pImage; } public static Rectangle getSourceRegion(final IIOParam pParam, final int pSrcWidth, final int pSrcHeight) { Rectangle sourceRegion = new Rectangle(pSrcWidth, pSrcHeight); // If param is present, calculate region if (pParam != null) { // Get intersection with source region Rectangle region = pParam.getSourceRegion(); if (region != null) { sourceRegion = sourceRegion.intersection(region); } // Scale according to subsampling offsets int subsampleXOffset = pParam.getSubsamplingXOffset(); int subsampleYOffset = pParam.getSubsamplingYOffset(); sourceRegion.x += subsampleXOffset; sourceRegion.y += subsampleYOffset; sourceRegion.width -= subsampleXOffset; sourceRegion.height -= subsampleYOffset; } return sourceRegion; } public static BufferedImage fakeAOI(final BufferedImage pImage, final Rectangle pSourceRegion) { if (pImage == null) { return null; } if (pSourceRegion != null) { if (pSourceRegion.x != 0 || pSourceRegion.y != 0 || pSourceRegion.width != pImage.getWidth() || pSourceRegion.height != pImage.getHeight()) { return pImage.getSubimage(pSourceRegion.x, pSourceRegion.y, pSourceRegion.width, pSourceRegion.height); } } return pImage; } /** * Creates a {@link ProviderInfo} instance for the given service provider. * * @param pProviderClass the provider class to get info for. * @return the newly created {@link ProviderInfo}. */ public static ProviderInfo getProviderInfo(final Class pProviderClass) { return new ProviderInfo(pProviderClass.getPackage()); } /** * THIS METHOD WILL ME MOVED/RENAMED, DO NOT USE. * * @param pRegistry the registry to unregister from * @param pProvider the provider to unregister * @param pCategory the category to unregister from * * @deprecated */ public static void deregisterProvider(final ServiceRegistry pRegistry, final IIOServiceProvider pProvider, final Class pCategory) { // http://www.ibm.com/developerworks/java/library/j-jtp04298.html // TODO: Consider placing this method in a ImageReaderSpiBase class or similar pRegistry.deregisterServiceProvider(pCategory.cast(pProvider), pCategory); } /** * Returns a sorted array of format names, that can be read by ImageIO. * The names are all upper-case, and contains no duplicates. * * @return a normalized array of {@code String}s. * @see javax.imageio.ImageIO#getReaderFormatNames() */ public static String[] getNormalizedReaderFormatNames() { return normalizeNames(ImageIO.getReaderFormatNames()); } /** * Returns a sorted array of format names, that can be written by ImageIO. * The names are all upper-case, and contains no duplicates. * * @return a normalized array of {@code String}s. * @see javax.imageio.ImageIO#getWriterFormatNames() */ public static String[] getNormalizedWriterFormatNames() { return normalizeNames(ImageIO.getWriterFormatNames()); } private static String[] normalizeNames(final String[] names) { SortedSet normalizedNames = new TreeSet(); for (String name : names) { normalizedNames.add(name.toUpperCase()); } return normalizedNames.toArray(new String[normalizedNames.size()]); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy