mirror of git://gcc.gnu.org/git/gcc.git
529 lines
18 KiB
Java
529 lines
18 KiB
Java
/* ImageConverter.java -- Loads images asynchronously
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Copyright (C) 2008 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt.image;
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import gnu.java.awt.image.AsyncImage;
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import java.awt.GraphicsEnvironment;
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import java.awt.Image;
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import java.awt.Transparency;
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import java.awt.image.BufferedImage;
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import java.awt.image.ColorModel;
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import java.awt.image.DataBuffer;
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import java.awt.image.ImageConsumer;
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import java.awt.image.IndexColorModel;
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import java.awt.image.ImageObserver;
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import java.awt.image.SinglePixelPackedSampleModel;
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import java.awt.image.WritableRaster;
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import java.util.Hashtable;
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/**
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* Convert an Image to a BufferedImage.
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*
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* @author Roman Kennke (kennke@aicas.com)
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*/
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public class ImageConverter implements ImageConsumer
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{
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public static final String IMAGE_TRANSPARENCY_PROPERTY =
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"gnu.awt.image.transparency";
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public static final String IMAGE_PROPERTIES_PROPERTY =
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"gnu.awt.image.properties";
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private AsyncImage image;
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private BufferedImage bImage;
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private Hashtable imageProperties;
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private int width, height;
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private ColorModel colorModel;
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private ColorModel targetColorModel;
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public ImageConverter()
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{
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width = 0;
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height = 0;
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image = new AsyncImage();
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}
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public void setDimensions(int w, int h)
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{
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width = w;
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height = h;
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}
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public void setProperties(Hashtable props)
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{
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// Ignore for now.
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}
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public void setColorModel(ColorModel model)
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{
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colorModel = model;
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}
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public void setHints(int flags)
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{
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// Ignore for now.
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}
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public void setPixels(int x, int y, int w, int h, ColorModel model,
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byte[] pixels, int offset, int scansize)
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{
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model = setupColorModel(model);
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if (bImage == null)
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{
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createImage();
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}
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Integer t = (Integer) imageProperties.get("gnu.awt.image.transparency");
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int transparency = t.intValue();
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if(targetColorModel.equals(model))
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{
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transparency = transferPixels(x, y, w, h, model, pixels, offset,
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scansize, transparency);
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}
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else if (model instanceof IndexColorModel
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&& targetColorModel.equals(ColorModel.getRGBdefault()))
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{
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transparency = convertIndexColorModelToSRGB(x, y, w, h,
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(IndexColorModel) model,
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pixels, offset, scansize,
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transparency);
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}
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else
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{
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transparency = convertPixels(x, y, w, h, model, pixels, offset,
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scansize, transparency);
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}
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imageProperties.put("gnu.awt.image.transparency",
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Integer.valueOf(transparency));
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}
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public void setPixels(int x, int y, int w, int h, ColorModel model,
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int[] pixels, int offset, int scansize)
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{
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model = setupColorModel(model);
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if (bImage == null)
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{
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createImage();
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}
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Integer t = (Integer) imageProperties.get(IMAGE_TRANSPARENCY_PROPERTY);
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int transparency= t.intValue();
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if (targetColorModel.equals(model))
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{
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transparency = transferPixels(x, y, w, h, model, pixels, offset,
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scansize, transparency);
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}
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else if (model instanceof IndexColorModel
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&& targetColorModel.equals(ColorModel.getRGBdefault()))
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{
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transparency = convertIndexColorModelToSRGB(x, y, w, h,
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(IndexColorModel) model,
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pixels, offset, scansize,
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transparency);
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}
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else
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{
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transparency = convertPixels(x, y, w, h, model, pixels, offset,
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scansize, transparency);
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}
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imageProperties.put(IMAGE_TRANSPARENCY_PROPERTY,
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Integer.valueOf(transparency));
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}
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/**
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* Initialize the color model for this setPixels run: <br/>
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* 1. if no color model was given use the hinted color model <br/>
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* 2. if no color model was given and non was hinted use the default sRGB color model. <br/>
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* Also:<br/>
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* If no target color model was set use the color model of the given pixels.
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* @param model
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* @return
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*/
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private ColorModel setupColorModel(ColorModel model)
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{
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// If the given color model is null use the previously hinted color model.
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if (model == null)
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model = colorModel;
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// If no color model was given or hinted use default sRGB.
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if (model == null)
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model = ColorModel.getRGBdefault();
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// If no specific color model was requested for the target use the current
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// pixels model.
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if (targetColorModel == null)
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targetColorModel = model;
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targetColorModel = ColorModel.getRGBdefault();
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return model;
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}
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/**
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* Creates the image instance into which the pixel data is converted.
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*/
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private void createImage()
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{
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if (imageProperties == null)
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{
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imageProperties = new Hashtable();
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}
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imageProperties.put(IMAGE_TRANSPARENCY_PROPERTY,
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Integer.valueOf(Transparency.OPAQUE));
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imageProperties.put(IMAGE_PROPERTIES_PROPERTY, imageProperties);
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// For the sRGB case let the GraphicsEnvironment create an image for us.
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if (ColorModel.getRGBdefault().equals(targetColorModel))
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{
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bImage = GraphicsEnvironment.getLocalGraphicsEnvironment()
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.getDefaultScreenDevice()
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.getDefaultConfiguration()
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.createCompatibleImage(width, height, Transparency.TRANSLUCENT);
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}
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else
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{
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WritableRaster raster =
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targetColorModel.createCompatibleWritableRaster(width, height);
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bImage = new BufferedImage(targetColorModel, raster, false,
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imageProperties);
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}
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image.setRealImage(bImage);
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return;
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}
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/**
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* Transfers pixels into a raster of the same color model.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int transferPixels(int x, int y, int w, int h, ColorModel model,
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byte[] pixels, int offset, int scansize,
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int transparency)
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{
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// If we have the same color model, then we can simply drop
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// the pixel value into the target raster.
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bImage.getRaster().setDataElements(x, y, w, h, pixels);
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for (int yy = 0; yy < h; yy++)
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{
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for (int xx = 0; xx < w; xx++)
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{
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int pixel = 0xFF & pixels[yy * scansize + xx + offset];
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int alpha = model.getAlpha(pixel);
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transparency = updateTransparency(alpha, transparency);
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}
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}
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return transparency;
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}
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/**
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* Transfers pixels into a raster of the same color model.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int transferPixels(int x, int y, int w, int h, ColorModel model,
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int[] pixels, int offset, int scansize,
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int transparency)
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{
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// If we have the same color model, then we can simply drop
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// the pixel value into the target raster.
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bImage.getRaster().setDataElements(x, y, w, h, pixels);
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for (int yy = 0; yy < h; yy++)
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{
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for (int xx = 0; xx < w; xx++)
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{
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int pixel = pixels[yy * scansize + xx + offset];
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int alpha = model.getAlpha(pixel);
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transparency = updateTransparency(alpha, transparency);
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}
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}
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return transparency;
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}
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/**
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* Converts pixel from one color model to another, and stores them in the
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* target image.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int convertPixels(int x, int y, int w, int h, ColorModel model,
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byte[] pixels, int offset, int scansize,
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int transparency)
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{
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// If the color models are not the same, we must convert the
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// pixel values from one model to the other.
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Object dataEl = null;
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// Convert pixels to the destination color model.
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for (int yy = 0; yy < h; yy++)
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{
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for (int xx = 0; xx < w; xx++)
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{
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int pixel = 0xFF & pixels[yy * scansize + xx + offset];
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int rgb = model.getRGB(pixel);
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int alpha = model.getAlpha(pixel);
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transparency = updateTransparency(alpha, transparency);
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dataEl = targetColorModel.getDataElements(rgb, dataEl);
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bImage.getRaster().setDataElements(x + xx, y + yy, dataEl);
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}
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}
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return transparency;
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}
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/**
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* Converts pixel from one color model to another, and stores them in the
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* target image.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int convertPixels(int x, int y, int w, int h, ColorModel model,
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int[] pixels, int offset, int scansize,
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int transparency)
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{
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// If the color models are not the same, we must convert the
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// pixel values from one model to the other.
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Object dataEl = null;
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// Convert pixels to the destination color model.
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for (int yy = 0; yy < h; yy++)
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{
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for (int xx = 0; xx < w; xx++)
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{
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int pixel = pixels[yy * scansize + xx + offset];
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int rgb = model.getRGB(pixel);
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int alpha = model.getAlpha(pixel);
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transparency = updateTransparency(alpha, transparency);
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dataEl = targetColorModel.getDataElements(rgb, dataEl);
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bImage.getRaster().setDataElements(x + xx, y + yy, dataEl);
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}
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}
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return transparency;
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}
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/**
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* Converts pixels from an index color model to the target image.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int convertIndexColorModelToSRGB(int x, int y, int w, int h,
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IndexColorModel model,
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byte[] pixels, int offset,
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int scansize, int transparency)
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{
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int mapSize = model.getMapSize();
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int[] colorMap = new int[mapSize];
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for(int i=0; i < mapSize; i++)
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{
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colorMap[i] = model.getRGB(i);
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}
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WritableRaster raster = bImage.getRaster();
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SinglePixelPackedSampleModel sampleMode =
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(SinglePixelPackedSampleModel) raster.getSampleModel();
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DataBuffer dataBuffer = (DataBuffer) raster.getDataBuffer();
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int rasterOffset = sampleMode.getOffset(x,y)+dataBuffer.getOffset();
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int rasterScanline = sampleMode.getScanlineStride();
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for (int yy = 0; yy < h; yy++)
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{
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int xoffset = offset;
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for (int xx = 0; xx < w; xx++)
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{
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int argb = colorMap[(pixels[xoffset++] & 0xFF)];
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dataBuffer.setElem(rasterOffset+xx, argb);
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int alpha = (argb >>> 24);
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transparency = updateTransparency(alpha, transparency);
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}
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offset += scansize;
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rasterOffset += rasterScanline;
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}
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return transparency;
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}
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/**
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* Converts pixels from an index color model to the target image.
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*
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* @param x the X coordinate of the source pixel rectangle
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* @param y the Y coordinate of the source pixel rectangle
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* @param w the width of the source pixel rectangle
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* @param h the height of the source pixel rectangle
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* @param model the color model of the source pixels
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* @param pixels the pixel data
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* @param offset the offset in the pixel array
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* @param scansize the scanline size
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* @param transparency the assumed transparency
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*
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* @return the determined transparency
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*/
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private int convertIndexColorModelToSRGB(int x, int y, int w, int h,
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IndexColorModel model, int[] pixels,
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int offset, int scansize,
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int transparency)
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{
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int mapSize = model.getMapSize();
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int[] colorMap = new int[mapSize];
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for(int i=0; i < mapSize; i++)
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{
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colorMap[i] = model.getRGB(i);
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}
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WritableRaster raster = bImage.getRaster();
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SinglePixelPackedSampleModel sampleMode =
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(SinglePixelPackedSampleModel) raster.getSampleModel();
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DataBuffer dataBuffer = (DataBuffer)raster.getDataBuffer();
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int rasterOffset = sampleMode.getOffset(x, y) + dataBuffer.getOffset();
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int rasterScanline = sampleMode.getScanlineStride();
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for (int yy = 0; yy < h; yy++)
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{
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int xoffset = offset;
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for (int xx = 0; xx < w; xx++)
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{
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int argb = colorMap[pixels[xoffset++]];
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dataBuffer.setElem(rasterOffset + xx, argb);
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int alpha = (argb >>> 24);
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transparency = updateTransparency(alpha, transparency);
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}
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offset += scansize;
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rasterOffset += rasterScanline;
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}
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return transparency;
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}
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/**
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* Updates the transparency information according to the alpha pixel value.
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*
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* @param alpha the alpha pixel value
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* @param transparency the old transparency
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*
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* @return the updated transparency
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*/
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private int updateTransparency(int alpha, int transparency)
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{
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if (alpha != 0xFF)
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{
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if (alpha == 0x00 && transparency <= Transparency.BITMASK)
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{
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transparency = Transparency.BITMASK;
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}
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else if (transparency < Transparency.TRANSLUCENT)
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{
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transparency = Transparency.TRANSLUCENT;
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}
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}
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return transparency;
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}
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public void imageComplete(int status)
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{
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image.notifyObservers(ImageObserver.ALLBITS, 0, 0, width, height);
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}
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public void setTargetColorModel(ColorModel model)
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{
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targetColorModel = model;
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}
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public Image getImage()
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{
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return image;
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}
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}
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