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/*
* Copyright 2004-2005 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.image;
import java.awt.Color;
import java.awt.Transparency;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.WritableRaster;
import java.awt.image.BufferedImage;
import java.io.IOException;
import org.apache.batik.ext.awt.image.codec.SeekableStream;
import org.apache.batik.ext.awt.image.codec.MemoryCacheSeekableStream;
import org.apache.batik.ext.awt.image.codec.FileCacheSeekableStream;
import org.apache.batik.ext.awt.image.rendered.Any2sRGBRed;
import org.apache.batik.ext.awt.image.rendered.CachableRed;
import org.apache.commons.io.IOUtils;
/**
* FopImage object using TIFF
* @author Eric SCHAEFFER
* @see AbstractFopImage
* @see FopImage
*/
public abstract class BatikImage extends AbstractFopImage {
private byte[] softMask = null;
/**
* The InputStream wrapped into a SeekableStream for decoding.
*/
protected SeekableStream seekableInput = null;
/**
* The Batik representation of the image
*/
protected CachableRed cr = null;
/**
* Constructs a new BatikImage instance.
* @param imgReader basic metadata for the image
*/
public BatikImage(FopImage.ImageInfo imgReader) {
super(imgReader);
}
/**
* @see org.apache.fop.image.AbstractFopImage#loadDimensions()
*/
protected boolean loadDimensions() {
if (seekableInput == null && inputStream != null) {
try {
seekableInput = new FileCacheSeekableStream(inputStream);
} catch (IOException ioe) {
seekableInput = new MemoryCacheSeekableStream(inputStream);
}
try {
this.bitsPerPixel = 8;
cr = decodeImage(seekableInput);
this.height = cr.getHeight();
this.width = cr.getWidth();
this.isTransparent = false;
this.softMask = null;
ColorModel cm = cr.getColorModel();
this.height = cr.getHeight();
this.width = cr.getWidth();
this.isTransparent = false;
this.softMask = null;
int transparencyType = cm.getTransparency();
if (cm instanceof IndexColorModel) {
if (transparencyType == Transparency.BITMASK) {
// Use 'transparent color'.
IndexColorModel icm = (IndexColorModel)cm;
int numColor = icm.getMapSize();
byte [] alpha = new byte[numColor];
icm.getAlphas(alpha);
for (int i = 0; i < numColor; i++) {
if ((alpha[i] & 0xFF) == 0) {
this.isTransparent = true;
int red = (icm.getRed (i)) & 0xFF;
int grn = (icm.getGreen(i)) & 0xFF;
int blu = (icm.getBlue (i)) & 0xFF;
this.transparentColor = new Color(red, grn, blu);
break;
}
}
}
} else {
cr = new Any2sRGBRed(cr);
}
// Get our current ColorModel
cm = cr.getColorModel();
if (this.colorSpace == null) {
this.colorSpace = cm.getColorSpace();
}
} catch (IOException ioe) {
log.error("Error while loading image (Batik): " + ioe.getMessage(), ioe);
IOUtils.closeQuietly(seekableInput);
IOUtils.closeQuietly(inputStream);
seekableInput = null;
inputStream = null;
return false;
}
}
return this.height != -1;
}
/**
* @see org.apache.fop.image.AbstractFopImage#loadBitmap()
*/
protected boolean loadBitmap() {
if (this.bitmaps == null) {
loadImage();
}
return this.bitmaps != null;
}
/**
* @see org.apache.fop.image.FopImage#hasSoftMask()
*/
public boolean hasSoftMask() {
if (this.bitmaps == null && this.raw == null) {
loadImage();
}
return (this.softMask != null);
}
/**
* @see org.apache.fop.image.FopImage#getSoftMask()
*/
public byte[] getSoftMask() {
if (this.bitmaps == null) {
loadImage();
}
return this.softMask;
}
/**
* Decodes the image from the stream.
* @param stream the stream to read the image from
* @return the decoded image
* @throws IOException in case an I/O problem occurs
*/
protected abstract CachableRed decodeImage(SeekableStream stream) throws IOException;
/**
* Loads the image from the InputStream.
*/
protected void loadImage() {
if (loadDimensions()) {
try {
if (cr == null) {
throw new IllegalStateException(
"Can't load the bitmaps data without the CachableRed instance");
}
// Get our current ColorModel
ColorModel cm = cr.getColorModel();
// It has an alpha channel so generate a soft mask.
if (!this.isTransparent && cm.hasAlpha()) {
this.softMask = new byte[this.width * this.height];
}
this.bitmaps = new byte[this.width * this.height * 3];
WritableRaster wr = (WritableRaster)cr.getData();
BufferedImage bi = new BufferedImage
(cm, wr.createWritableTranslatedChild(0, 0),
cm.isAlphaPremultiplied(), null);
int [] tmpMap = new int[this.width];
int idx = 0;
int sfIdx = 0;
for (int y = 0; y < this.height; y++) {
tmpMap = bi.getRGB(0, y, this.width, 1, tmpMap, 0, this.width);
if (softMask != null) {
for (int x = 0; x < this.width; x++) {
int pix = tmpMap[x];
this.softMask[sfIdx++] = (byte)(pix >>> 24);
this.bitmaps[idx++] = (byte)((pix >>> 16) & 0xFF);
this.bitmaps[idx++] = (byte)((pix >>> 8) & 0xFF);
this.bitmaps[idx++] = (byte)((pix) & 0xFF);
}
} else {
for (int x = 0; x < this.width; x++) {
int pix = tmpMap[x];
this.bitmaps[idx++] = (byte)((pix >> 16) & 0xFF);
this.bitmaps[idx++] = (byte)((pix >> 8) & 0xFF);
this.bitmaps[idx++] = (byte)((pix) & 0xFF);
}
}
}
} catch (Exception ex) {
log.error("Error while loading image (Batik): " + ex.getMessage(), ex);
} finally {
// Make sure we clean up
IOUtils.closeQuietly(seekableInput);
IOUtils.closeQuietly(inputStream);
seekableInput = null;
inputStream = null;
cr = null;
}
}
}
};
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