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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.render.afp;
import java.awt.Rectangle;
import java.awt.image.RenderedImage;
import java.io.IOException;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.impl.ImageRendered;
import org.apache.xmlgraphics.ps.ImageEncodingHelper;
import org.apache.xmlgraphics.util.MimeConstants;
import org.apache.fop.afp.AFPDataObjectInfo;
import org.apache.fop.afp.AFPImageObjectInfo;
import org.apache.fop.afp.AFPObjectAreaInfo;
import org.apache.fop.afp.AFPPaintingState;
import org.apache.fop.render.ImageHandler;
import org.apache.fop.render.RenderingContext;
/**
* PDFImageHandler implementation which handles RenderedImage instances.
*/
public class AFPImageHandlerRenderedImage extends AFPImageHandler implements ImageHandler {
private static final ImageFlavor[] FLAVORS = new ImageFlavor[] {
ImageFlavor.BUFFERED_IMAGE,
ImageFlavor.RENDERED_IMAGE
};
/** {@inheritDoc} */
public AFPDataObjectInfo generateDataObjectInfo(
AFPRendererImageInfo rendererImageInfo) throws IOException {
AFPImageObjectInfo imageObjectInfo
= (AFPImageObjectInfo)super.generateDataObjectInfo(rendererImageInfo);
AFPRendererContext rendererContext
= (AFPRendererContext)rendererImageInfo.getRendererContext();
AFPInfo afpInfo = rendererContext.getInfo();
AFPPaintingState paintingState = afpInfo.getPaintingState();
ImageRendered imageRendered = (ImageRendered) rendererImageInfo.img;
updateDataObjectInfo(imageObjectInfo, paintingState, imageRendered);
return imageObjectInfo;
}
private AFPDataObjectInfo updateDataObjectInfo(AFPImageObjectInfo imageObjectInfo,
AFPPaintingState paintingState, ImageRendered imageRendered)
throws IOException {
int resolution = paintingState.getResolution();
imageObjectInfo.setMimeType(MimeConstants.MIME_AFP_IOCA_FS45);
imageObjectInfo.setDataHeightRes(resolution);
imageObjectInfo.setDataWidthRes(resolution);
RenderedImage renderedImage = imageRendered.getRenderedImage();
int dataHeight = renderedImage.getHeight();
imageObjectInfo.setDataHeight(dataHeight);
int dataWidth = renderedImage.getWidth();
imageObjectInfo.setDataWidth(dataWidth);
//TODO This needs to be improved: Buffering whole images in memory is bad.
//Images with fewer bits per pixel than the required output format are unnecessarily
//increased in size (extreme case: 1-bit images are blown up to 24 bits if color is
//enabled). For grayscale output, encoding is even a two-step process which
//needs to be streamlined to a single step. The resulting bitmap is then still buffered
//in memory. To reduce AFP file size, investigate using a compression scheme.
//Currently, all image data is uncompressed.
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageEncodingHelper.encodeRenderedImageAsRGB(renderedImage, baos);
byte[] imageData = baos.toByteArray();
boolean colorImages = paintingState.isColorImages();
imageObjectInfo.setColor(colorImages);
// convert to grayscale
if (!colorImages) {
baos.reset();
int bitsPerPixel = paintingState.getBitsPerPixel();
imageObjectInfo.setBitsPerPixel(bitsPerPixel);
ImageEncodingHelper.encodeRGBAsGrayScale(
imageData, dataWidth, dataHeight, bitsPerPixel, baos);
imageData = baos.toByteArray();
}
imageObjectInfo.setData(imageData);
// set object area info
AFPObjectAreaInfo objectAreaInfo = imageObjectInfo.getObjectAreaInfo();
objectAreaInfo.setWidthRes(resolution);
objectAreaInfo.setHeightRes(resolution);
return imageObjectInfo;
}
/** {@inheritDoc} */
protected AFPDataObjectInfo createDataObjectInfo() {
return new AFPImageObjectInfo();
}
/** {@inheritDoc} */
public int getPriority() {
return 300;
}
/** {@inheritDoc} */
public Class getSupportedImageClass() {
return ImageRendered.class;
}
/** {@inheritDoc} */
public ImageFlavor[] getSupportedImageFlavors() {
return FLAVORS;
}
/** {@inheritDoc} */
public void handleImage(RenderingContext context, Image image, Rectangle pos)
throws IOException {
AFPRenderingContext afpContext = (AFPRenderingContext)context;
AFPImageObjectInfo imageObjectInfo = (AFPImageObjectInfo)createDataObjectInfo();
// set resource information
setResourceInformation(imageObjectInfo,
image.getInfo().getOriginalURI(),
afpContext.getForeignAttributes());
// Positioning
imageObjectInfo.setObjectAreaInfo(createObjectAreaInfo(afpContext.getPaintingState(), pos));
// Image content
ImageRendered imageRend = (ImageRendered)image;
updateDataObjectInfo(imageObjectInfo, afpContext.getPaintingState(), imageRend);
// Create image
afpContext.getResourceManager().createObject(imageObjectInfo);
}
/** {@inheritDoc} */
public boolean isCompatible(RenderingContext targetContext, Image image) {
return (image == null || image instanceof ImageRendered)
&& targetContext instanceof AFPRenderingContext;
}
}
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