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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.ps;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.ImageInfo;
import org.apache.xmlgraphics.image.loader.impl.ImageGraphics2D;
import org.apache.xmlgraphics.java2d.Graphics2DImagePainter;
import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
import org.apache.xmlgraphics.ps.FormGenerator;
import org.apache.xmlgraphics.ps.PSGenerator;
import org.apache.xmlgraphics.ps.PSProcSets;
import org.apache.fop.render.RenderingContext;
/**
* Image handler implementation which handles vector graphics (Java2D) for PostScript output.
*/
public class PSImageHandlerGraphics2D implements PSImageHandler {
private static final ImageFlavor[] FLAVORS = new ImageFlavor[] {
ImageFlavor.GRAPHICS2D
};
/** {@inheritDoc} */
public void handleImage(RenderingContext context, Image image, Rectangle pos)
throws IOException {
PSRenderingContext psContext = (PSRenderingContext)context;
PSGenerator gen = psContext.getGenerator();
ImageGraphics2D imageG2D = (ImageGraphics2D)image;
Graphics2DImagePainter painter = imageG2D.getGraphics2DImagePainter();
float fx = (float)pos.getX() / 1000f;
float fy = (float)pos.getY() / 1000f;
float fwidth = (float)pos.getWidth() / 1000f;
float fheight = (float)pos.getHeight() / 1000f;
// get the 'width' and 'height' attributes of the SVG document
Dimension dim = painter.getImageSize();
float imw = (float)dim.getWidth() / 1000f;
float imh = (float)dim.getHeight() / 1000f;
float sx = fwidth / imw;
float sy = fheight / imh;
gen.commentln("%FOPBeginGraphics2D");
gen.saveGraphicsState();
final boolean clip = false;
if (clip) {
// Clip to the image area.
gen.writeln("newpath");
gen.defineRect(fx, fy, fwidth, fheight);
gen.writeln("clip");
}
// transform so that the coordinates (0,0) is from the top left
// and positive is down and to the right. (0,0) is where the
// viewBox puts it.
gen.concatMatrix(sx, 0, 0, sy, fx, fy);
final boolean textAsShapes = false;
PSGraphics2D graphics = new PSGraphics2D(textAsShapes, gen);
graphics.setGraphicContext(new org.apache.xmlgraphics.java2d.GraphicContext());
AffineTransform transform = new AffineTransform();
// scale to viewbox
transform.translate(fx, fy);
gen.getCurrentState().concatMatrix(transform);
Rectangle2D area = new Rectangle2D.Double(0.0, 0.0, imw, imh);
painter.paint(graphics, area);
gen.restoreGraphicsState();
gen.commentln("%FOPEndGraphics2D");
}
/** {@inheritDoc} */
public void generateForm(RenderingContext context, Image image, final PSImageFormResource form)
throws IOException {
PSRenderingContext psContext = (PSRenderingContext)context;
PSGenerator gen = psContext.getGenerator();
final ImageGraphics2D imageG2D = (ImageGraphics2D)image;
ImageInfo info = image.getInfo();
FormGenerator formGen = buildFormGenerator(gen.getPSLevel(), form, info, imageG2D);
formGen.generate(gen);
}
/** {@inheritDoc} */
public int getPriority() {
return 200;
}
/** {@inheritDoc} */
public Class getSupportedImageClass() {
return ImageGraphics2D.class;
}
/** {@inheritDoc} */
public ImageFlavor[] getSupportedImageFlavors() {
return FLAVORS;
}
/** {@inheritDoc} */
public boolean isCompatible(RenderingContext targetContext, Image image) {
if (targetContext instanceof PSRenderingContext) {
return (image == null || image instanceof ImageGraphics2D);
}
return false;
}
private FormGenerator buildFormGenerator(int psLanguageLevel, final PSImageFormResource form,
final ImageInfo info, final ImageGraphics2D imageG2D) {
String imageDescription = info.getMimeType() + " " + info.getOriginalURI();
final Dimension2D dimensionsPt = info.getSize().getDimensionPt();
final Dimension2D dimensionsMpt = info.getSize().getDimensionMpt();
FormGenerator formGen;
if (psLanguageLevel <= 2) {
formGen = new EPSFormGenerator(form.getName(), imageDescription, dimensionsPt) {
@Override
void doGeneratePaintProc(PSGenerator gen) throws IOException {
paintImageG2D(imageG2D, dimensionsMpt, gen);
}
};
} else {
formGen = new EPSFormGenerator(form.getName(), imageDescription, dimensionsPt) {
@Override
protected void generateAdditionalDataStream(PSGenerator gen) throws IOException {
gen.writeln("/" + form.getName() + ":Data currentfile <<");
gen.writeln(" /Filter /SubFileDecode");
gen.writeln(" /DecodeParms << /EODCount 0 /EODString (%FOPEndOfData) >>");
gen.writeln(">> /ReusableStreamDecode filter");
paintImageG2D(imageG2D, dimensionsMpt, gen);
gen.writeln("%FOPEndOfData");
gen.writeln("def");
}
@Override
void doGeneratePaintProc(PSGenerator gen) throws IOException {
gen.writeln(form.getName() + ":Data 0 setfileposition");
gen.writeln(form.getName() + ":Data cvx exec");
}
};
}
return formGen;
}
private abstract static class EPSFormGenerator extends FormGenerator {
EPSFormGenerator(String formName, String title, Dimension2D dimensions) {
super(formName, title, dimensions);
}
protected void paintImageG2D(final ImageGraphics2D imageG2D, Dimension2D dimensionsMpt,
PSGenerator gen) throws IOException {
PSGraphics2DAdapter adapter = new PSGraphics2DAdapter(gen, false);
adapter.paintImage(imageG2D.getGraphics2DImagePainter(),
null,
0, 0,
(int) Math.round(dimensionsMpt.getWidth()),
(int) Math.round(dimensionsMpt.getHeight()));
}
@Override
protected final void generatePaintProc(PSGenerator gen) throws IOException {
gen.getResourceTracker().notifyResourceUsageOnPage(
PSProcSets.EPS_PROCSET);
gen.writeln("BeginEPSF");
doGeneratePaintProc(gen);
gen.writeln("EndEPSF");
}
abstract void doGeneratePaintProc(PSGenerator gen) throws IOException;
}
}
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