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- /*
- * Copyright 1999-2005 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.svg;
-
- import java.awt.Color;
- import java.io.IOException;
-
- import org.apache.avalon.framework.configuration.Configurable;
- import org.apache.avalon.framework.configuration.Configuration;
- import org.apache.avalon.framework.configuration.ConfigurationException;
- import org.apache.avalon.framework.container.ContainerUtil;
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.UnitProcessor;
- import org.apache.batik.bridge.UserAgent;
- import org.apache.batik.ext.awt.RenderingHintsKeyExt;
- import org.apache.batik.transcoder.TranscoderException;
- import org.apache.batik.transcoder.TranscoderOutput;
- import org.apache.batik.transcoder.TranscodingHints;
- import org.apache.batik.transcoder.image.ImageTranscoder;
- import org.apache.batik.transcoder.keys.FloatKey;
- import org.w3c.dom.Document;
- import org.w3c.dom.svg.SVGLength;
-
- /**
- * This class enables to transcode an input to a pdf document.
- *
- * <p>Two transcoding hints (<tt>KEY_WIDTH</tt> and
- * <tt>KEY_HEIGHT</tt>) can be used to respectively specify the image
- * width and the image height. If only one of these keys is specified,
- * the transcoder preserves the aspect ratio of the original image.
- *
- * <p>The <tt>KEY_BACKGROUND_COLOR</tt> defines the background color
- * to use for opaque image formats, or the background color that may
- * be used for image formats that support alpha channel.
- *
- * <p>The <tt>KEY_AOI</tt> represents the area of interest to paint
- * in device space.
- *
- * <p>Three additional transcoding hints that act on the SVG
- * processor can be specified:
- *
- * <p><tt>KEY_LANGUAGE</tt> to set the default language to use (may be
- * used by a <switch> SVG element for example),
- * <tt>KEY_USER_STYLESHEET_URI</tt> to fix the URI of a user
- * stylesheet, and <tt>KEY_PIXEL_TO_MM</tt> to specify the pixel to
- * millimeter conversion factor.
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- * @version $Id$
- */
- public class PDFTranscoder extends AbstractFOPTranscoder
- implements Configurable {
-
- /**
- * The key is used to specify the resolution for on-the-fly images generated
- * due to complex effects like gradients and filters.
- */
- public static final TranscodingHints.Key KEY_DEVICE_RESOLUTION = new FloatKey();
-
- private Configuration cfg = null;
-
- /** Graphics2D instance that is used to paint to */
- protected PDFDocumentGraphics2D graphics = null;
-
- /**
- * Constructs a new <tt>ImageTranscoder</tt>.
- */
- public PDFTranscoder() {
- super();
- this.handler = new FOPErrorHandler();
- }
-
- /**
- * @see org.apache.fop.svg.AbstractFOPTranscoder#createUserAgent()
- */
- protected UserAgent createUserAgent() {
- return new AbstractFOPTranscoder.FOPTranscoderUserAgent() {
- // The PDF stuff wants everything at 72dpi
- public float getPixelUnitToMillimeter() {
- return super.getPixelUnitToMillimeter();
- //return 25.4f / 72; //72dpi = 0.352778f;
- }
- };
- }
-
- /**
- * @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
- */
- public void configure(Configuration cfg) throws ConfigurationException {
- this.cfg = cfg;
- }
-
- /**
- * Transcodes the specified Document as an image in the specified output.
- *
- * @param document the document to transcode
- * @param uri the uri of the document or null if any
- * @param output the ouput where to transcode
- * @exception TranscoderException if an error occured while transcoding
- */
- protected void transcode(Document document, String uri,
- TranscoderOutput output)
- throws TranscoderException {
-
- graphics = new PDFDocumentGraphics2D();
-
- try {
- if (this.cfg != null) {
- ContainerUtil.configure(graphics, this.cfg);
- }
- ContainerUtil.initialize(graphics);
- } catch (Exception e) {
- throw new TranscoderException(
- "Error while setting up PDFDocumentGraphics2D", e);
- }
-
- super.transcode(document, uri, output);
-
- getLogger().trace("document size: " + width + " x " + height);
-
- // prepare the image to be painted
- UnitProcessor.Context uctx = UnitProcessor.createContext(ctx,
- document.getDocumentElement());
- float widthInPt = UnitProcessor.userSpaceToSVG(width, SVGLength.SVG_LENGTHTYPE_PT,
- UnitProcessor.HORIZONTAL_LENGTH, uctx);
- int w = (int)(widthInPt + 0.5);
- float heightInPt = UnitProcessor.userSpaceToSVG(height, SVGLength.SVG_LENGTHTYPE_PT,
- UnitProcessor.HORIZONTAL_LENGTH, uctx);
- int h = (int)(heightInPt + 0.5);
- getLogger().trace("document size: " + w + "pt x " + h + "pt");
-
- // prepare the image to be painted
- //int w = (int)(width + 0.5);
- //int h = (int)(height + 0.5);
-
- try {
- if (hints.containsKey(KEY_DEVICE_RESOLUTION)) {
- graphics.setDeviceDPI(((Float)hints.get(KEY_DEVICE_RESOLUTION)).floatValue());
- }
- graphics.setupDocument(output.getOutputStream(), w, h);
- graphics.setSVGDimension(width, height);
-
- if (hints.containsKey(ImageTranscoder.KEY_BACKGROUND_COLOR)) {
- graphics.setBackgroundColor
- ((Color)hints.get(ImageTranscoder.KEY_BACKGROUND_COLOR));
- }
- graphics.setGraphicContext
- (new org.apache.xmlgraphics.java2d.GraphicContext());
- graphics.preparePainting();
-
- graphics.transform(curTxf);
- graphics.setRenderingHint
- (RenderingHintsKeyExt.KEY_TRANSCODING,
- RenderingHintsKeyExt.VALUE_TRANSCODING_VECTOR);
-
- this.root.paint(graphics);
-
- graphics.finish();
- } catch (IOException ex) {
- throw new TranscoderException(ex);
- }
- }
-
- /** @see org.apache.batik.transcoder.SVGAbstractTranscoder#createBridgeContext() */
- protected BridgeContext createBridgeContext() {
- BridgeContext ctx = new PDFBridgeContext(userAgent, graphics.getFontInfo());
- return ctx;
- }
-
- }
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