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Diffstat (limited to 'src/org/apache/fop/svg/PDFTranscoder.java')
| -rw-r--r-- | src/org/apache/fop/svg/PDFTranscoder.java | 659 |
1 files changed, 659 insertions, 0 deletions
diff --git a/src/org/apache/fop/svg/PDFTranscoder.java b/src/org/apache/fop/svg/PDFTranscoder.java new file mode 100644 index 000000000..fdf67007c --- /dev/null +++ b/src/org/apache/fop/svg/PDFTranscoder.java @@ -0,0 +1,659 @@ +/***************************************************************************** + * Copyright (C) The Apache Software Foundation. All rights reserved. * + * ------------------------------------------------------------------------- * + * This software is published under the terms of the Apache Software License * + * version 1.1, a copy of which has been included with this distribution in * + * the LICENSE file. * + *****************************************************************************/ + +package org.apache.fop.svg; + +import java.awt.AlphaComposite; +import java.awt.Cursor; +import java.awt.Dimension; +import java.awt.Graphics2D; +import java.awt.Paint; +import java.awt.Point; +import java.awt.Rectangle; +import java.awt.Shape; + +import java.awt.geom.AffineTransform; +import java.awt.geom.Dimension2D; +import java.awt.geom.Rectangle2D; +import java.awt.image.BufferedImage; + +import java.awt.*; +import java.awt.event.*; +import java.awt.geom.*; +import java.awt.font.*; + +import java.net.MalformedURLException; +import java.net.URL; + +import java.util.HashSet; +import java.util.Set; + +import org.apache.batik.transcoder.*; + +import org.apache.batik.bridge.BridgeContext; +import org.apache.batik.bridge.BridgeException; +import org.apache.batik.bridge.GVTBuilder; +import org.apache.batik.bridge.UserAgent; +import org.apache.batik.bridge.ViewBox; + +import org.apache.batik.dom.svg.DefaultSVGContext; +import org.apache.batik.dom.svg.SAXSVGDocumentFactory; +import org.apache.batik.dom.svg.SVGDOMImplementation; +import org.apache.batik.dom.svg.SVGOMDocument; +import org.apache.batik.dom.util.DocumentFactory; + +import org.apache.batik.ext.awt.image.GraphicsUtil; + +import org.apache.batik.gvt.GraphicsNode; +import org.apache.batik.gvt.GraphicsNodeRenderContext; +import org.apache.batik.gvt.event.EventDispatcher; +import org.apache.batik.gvt.renderer.ImageRenderer; +import org.apache.batik.gvt.renderer.ImageRendererFactory; + +import org.apache.batik.transcoder.TranscoderException; +import org.apache.batik.transcoder.TranscoderOutput; +import org.apache.batik.transcoder.TranscodingHints; +import org.apache.batik.transcoder.XMLAbstractTranscoder; +import org.apache.batik.transcoder.image.resources.Messages; + +import org.apache.batik.transcoder.keys.BooleanKey; +import org.apache.batik.transcoder.keys.FloatKey; +import org.apache.batik.transcoder.keys.LengthKey; +import org.apache.batik.transcoder.keys.PaintKey; +import org.apache.batik.transcoder.keys.PaintKey; +import org.apache.batik.transcoder.keys.Rectangle2DKey; +import org.apache.batik.transcoder.keys.StringKey; +import org.apache.batik.transcoder.*; + +import org.apache.batik.util.SVGConstants; + +import org.apache.batik.bridge.*; +import org.apache.batik.swing.svg.*; +import org.apache.batik.swing.gvt.*; +import org.apache.batik.gvt.*; +import org.apache.batik.gvt.renderer.*; +import org.apache.batik.gvt.filter.*; +import org.apache.batik.gvt.event.*; + +import org.w3c.dom.*; +import org.w3c.dom.svg.*; +import org.w3c.dom.css.*; +import org.w3c.dom.svg.SVGLength; + +import org.apache.fop.svg.*; + +import org.w3c.dom.DOMException; +import org.w3c.dom.DOMImplementation; +import org.w3c.dom.Document; +import org.w3c.dom.svg.SVGAElement; +import org.w3c.dom.svg.SVGDocument; +import org.w3c.dom.svg.SVGSVGElement; + +// <!> FIXME : Those import clauses will change with new design +import org.apache.batik.gvt.renderer.StaticRendererFactory; + +/** + * This class enables to transcode an input to an image of any format. + * + * <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:Thierry.Kormann@sophia.inria.fr">Thierry Kormann</a> + * @version $Id$ + */ +public class PDFTranscoder extends XMLAbstractTranscoder { + + /** The user agent dedicated to an <tt>ImageTranscoder</tt>. */ + protected UserAgent userAgent = new ImageTranscoderUserAgent(); + + /** + * Constructs a new <tt>ImageTranscoder</tt>. + */ + public PDFTranscoder() { + hints.put(KEY_DOCUMENT_ELEMENT_NAMESPACE_URI, + SVGConstants.SVG_NAMESPACE_URI); + hints.put(KEY_DOCUMENT_ELEMENT, + SVGConstants.SVG_SVG_TAG); + hints.put(KEY_DOM_IMPLEMENTATION, + SVGDOMImplementation.getDOMImplementation()); + } + + /** + * 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 { + + if (!(document instanceof SVGOMDocument)) { + throw new TranscoderException( + Messages.formatMessage("notsvg", null)); + } + SVGDocument svgDoc = (SVGDocument)document; + SVGSVGElement root = svgDoc.getRootElement(); + // initialize the SVG document with the appropriate context + String parserClassname = (String)hints.get(KEY_XML_PARSER_CLASSNAME); + DefaultSVGContext svgCtx = new DefaultSVGContext(); + svgCtx.setPixelToMM(userAgent.getPixelToMM()); + ((SVGOMDocument)document).setSVGContext(svgCtx); + + // build the GVT tree + GVTBuilder builder = new GVTBuilder(); + ImageRendererFactory rendFactory = new StaticRendererFactory(); + GraphicsNodeRenderContext rc = getRenderContext(); + BridgeContext ctx = new BridgeContext(userAgent, rc); + GraphicsNode gvtRoot; + try { + gvtRoot = builder.build(ctx, svgDoc); + } catch (BridgeException ex) { + throw new TranscoderException(ex); + } + // get the 'width' and 'height' attributes of the SVG document + float docWidth = (float)ctx.getDocumentSize().getWidth(); + float docHeight = (float)ctx.getDocumentSize().getHeight(); + ctx = null; + builder = null; + + // compute the image's width and height according the hints + float imgWidth = -1; + if (hints.containsKey(KEY_WIDTH)) { + imgWidth = ((Float)hints.get(KEY_WIDTH)).floatValue(); + } + float imgHeight = -1; + if (hints.containsKey(KEY_HEIGHT)) { + imgHeight = ((Float)hints.get(KEY_HEIGHT)).floatValue(); + } + float width, height; + if (imgWidth > 0 && imgHeight > 0) { + width = imgWidth; + height = imgHeight; + } else if (imgHeight > 0) { + width = (docWidth * imgHeight) / docHeight; + height = imgHeight; + } else if (imgWidth > 0) { + width = imgWidth; + height = (docHeight * imgWidth) / docWidth; + } else { + width = docWidth; + height = docHeight; + } + // compute the preserveAspectRatio matrix + AffineTransform Px; + String ref = null; + try { + ref = new URL(uri).getRef(); + } catch (MalformedURLException ex) { + // nothing to do, catched previously + } + + try { + Px = ViewBox.getViewTransform(ref, root, width, height); + } catch (BridgeException ex) { + throw new TranscoderException(ex); + } + + if (Px.isIdentity() && (width != docWidth || height != docHeight)) { + // The document has no viewBox, we need to resize it by hand. + // we want to keep the document size ratio + float d = Math.max(docWidth, docHeight); + float dd = Math.max(width, height); + float scale = dd/d; + Px = AffineTransform.getScaleInstance(scale, scale); + } + // take the AOI into account if any + if (hints.containsKey(KEY_AOI)) { + Rectangle2D aoi = (Rectangle2D)hints.get(KEY_AOI); + // transform the AOI into the image's coordinate system + aoi = Px.createTransformedShape(aoi).getBounds2D(); + AffineTransform Mx = new AffineTransform(); + double sx = width / aoi.getWidth(); + double sy = height / aoi.getHeight(); + Mx.scale(sx, sy); + double tx = -aoi.getX(); + double ty = -aoi.getY(); + Mx.translate(tx, ty); + // take the AOI transformation matrix into account + // we apply first the preserveAspectRatio matrix + Px.preConcatenate(Mx); + } + // prepare the image to be painted + int w = (int)width; + int h = (int)height; + + PDFDocumentGraphics2D graphics = new PDFDocumentGraphics2D(true, output.getOutputStream(), w, h); + // GraphicsNodeRenderContext rc = getRenderContext(); + graphics.setGraphicContext(new org.apache.batik.ext.awt.g2d.GraphicContext()); + graphics.setRenderingHints(rc.getRenderingHints()); + + gvtRoot.paint(graphics, rc); + + try { + graphics.finish(); + } catch (Exception ex) { + ex.printStackTrace(); + throw new TranscoderException(ex); + } + /* + // paint the SVG document using the bridge package + // create the appropriate renderer + ImageRenderer renderer = rendFactory.createImageRenderer(); + renderer.updateOffScreen(w, h); + renderer.setTransform(Px); + renderer.setTree(gvtRoot); + gvtRoot = null; // We're done with it... + + try { + // now we are sure that the aoi is the image size + Shape raoi = new Rectangle2D.Float(0, 0, width, height); + // Warning: the renderer's AOI must be in user space + renderer.repaint(Px.createInverse().createTransformedShape(raoi)); + BufferedImage rend = renderer.getOffScreen(); + renderer = null; // We're done with it... + + // BufferedImage dest = createImage(w, h); + + //Graphics2D g2d = GraphicsUtil.createGraphics(dest); + + //g2d.drawRenderedImage(rend, new AffineTransform()); + } catch (Exception ex) { + throw new TranscoderException(ex); + } + */ + } + + public GraphicsNodeRenderContext getRenderContext() { + GraphicsNodeRenderContext nodeRenderContext = null; + if (nodeRenderContext == null) { + RenderingHints hints = new RenderingHints(null); + hints.put(RenderingHints.KEY_ANTIALIASING, + RenderingHints.VALUE_ANTIALIAS_ON); + + hints.put(RenderingHints.KEY_INTERPOLATION, + RenderingHints.VALUE_INTERPOLATION_BILINEAR); + + FontRenderContext fontRenderContext = + new FontRenderContext(new AffineTransform(), true, true); + + TextPainter textPainter = new StrokingTextPainter(); + + GraphicsNodeRableFactory gnrFactory = + new ConcreteGraphicsNodeRableFactory(); + + nodeRenderContext = + new GraphicsNodeRenderContext(new AffineTransform(), + null, + hints, + fontRenderContext, + textPainter, + gnrFactory); + nodeRenderContext.setTextPainter(textPainter); + } + + return nodeRenderContext; + } + + /** + * Creates a <tt>DocumentFactory</tt> that is used to create an SVG DOM + * tree. The specified DOM Implementation is ignored and the Batik + * SVG DOM Implementation is automatically used. + * + * @param domImpl the DOM Implementation (not used) + * @param parserClassname the XML parser classname + */ + protected DocumentFactory createDocumentFactory(DOMImplementation domImpl, + String parserClassname) { + return new SAXSVGDocumentFactory(parserClassname); + } + + // -------------------------------------------------------------------- + // UserAgent implementation + // -------------------------------------------------------------------- + + /** + * A user agent implementation for <tt>ImageTranscoder</tt>. + */ + protected class ImageTranscoderUserAgent implements UserAgent { + + /** + * Returns the default size of this user agent (400x400). + */ + public Dimension2D getViewportSize() { + return new Dimension(400, 400); + } + + /** + * Displays the specified error message using the <tt>ErrorHandler</tt>. + */ + public void displayError(String message) { + try { + getErrorHandler().error(new TranscoderException(message)); + } catch (TranscoderException ex) { + throw new RuntimeException(); + } + } + + /** + * Displays the specified error using the <tt>ErrorHandler</tt>. + */ + public void displayError(Exception e) { + try { + getErrorHandler().error(new TranscoderException(e)); + } catch (TranscoderException ex) { + throw new RuntimeException(); + } + } + + /** + * Displays the specified message using the <tt>ErrorHandler</tt>. + */ + public void displayMessage(String message) { + try { + getErrorHandler().warning(new TranscoderException(message)); + } catch (TranscoderException ex) { + throw new RuntimeException(); + } + } + + /** + * Returns the pixel to millimeter conversion factor specified in the + * <tt>TranscodingHints</tt> or 0.3528 if any. + */ + public float getPixelToMM() { + if (getTranscodingHints().containsKey(KEY_PIXEL_TO_MM)) { + return ((Float)getTranscodingHints().get(KEY_PIXEL_TO_MM)).floatValue(); + } else { + // return 0.3528f; // 72 dpi + return 0.26458333333333333333333333333333f; // 96dpi + } + } + + /** + * Returns the user language specified in the + * <tt>TranscodingHints</tt> or "en" (english) if any. + */ + public String getLanguages() { + if (getTranscodingHints().containsKey(KEY_LANGUAGE)) { + return (String)getTranscodingHints().get(KEY_LANGUAGE); + } else { + return "en"; + } + } + + /** + * Returns the user stylesheet specified in the + * <tt>TranscodingHints</tt> or null if any. + */ + public String getUserStyleSheetURI() { + return (String)getTranscodingHints().get(KEY_USER_STYLESHEET_URI); + } + + /** + * Returns the XML parser to use from the TranscodingHints. + */ + public String getXMLParserClassName() { + return (String)getTranscodingHints().get(KEY_XML_PARSER_CLASSNAME); + } + + /** + * Unsupported operation. + */ + public EventDispatcher getEventDispatcher() { + return null; + } + + /** + * Unsupported operation. + */ + public void openLink(SVGAElement elt) { } + + /** + * Unsupported operation. + */ + public void setSVGCursor(Cursor cursor) { } + + /** + * Unsupported operation. + */ + public void runThread(Thread t) { } + + /** + * Unsupported operation. + */ + public AffineTransform getTransform() { + return null; + } + + /** + * Unsupported operation. + */ + public Point getClientAreaLocationOnScreen() { + return new Point(); + } + + /** + * Tells whether the given feature is supported by this + * user agent. + */ + public boolean hasFeature(String s) { + return FEATURES.contains(s); + } + + /** + * Tells whether the given extension is supported by this + * user agent. + */ + public boolean supportExtension(String s) { + return false; + } + + public void registerExtension(BridgeExtension be) + { + } + } + + protected final static Set FEATURES = new HashSet(); + static { + FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_FEATURE); + FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_LANG_FEATURE); + FEATURES.add(SVGConstants.SVG_ORG_W3C_SVG_STATIC_FEATURE); + } + + // -------------------------------------------------------------------- + // Keys definition + // -------------------------------------------------------------------- + + /** + * The image width key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_WIDTH</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">Float</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">The width of the top most svg element</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the width of the image to create.</TD></TR> + * </TABLE> */ + public static final TranscodingHints.Key KEY_WIDTH + = new LengthKey(); + + /** + * The image height key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_HEIGHT</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">Float</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">The height of the top most svg element</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the height of the image to create.</TD></TR> + * </TABLE> */ + public static final TranscodingHints.Key KEY_HEIGHT + = new LengthKey(); + + /** + * The area of interest key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_AOI</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">Rectangle2D</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">The document's size</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the area of interest to render. The + * rectangle coordinates must be specified in pixels and in the + * document coordinates system.</TD></TR> + * </TABLE> + */ + public static final TranscodingHints.Key KEY_AOI + = new Rectangle2DKey(); + + /** + * The language key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_LANGUAGE</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">String</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">"en"</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the preferred language of the document. + * </TD></TR> + * </TABLE> + */ + public static final TranscodingHints.Key KEY_LANGUAGE + = new StringKey(); + + /** + * The user stylesheet URI key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_USER_STYLESHEET_URI</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">String</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">null</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the user style sheet.</TD></TR> + * </TABLE> + */ + public static final TranscodingHints.Key KEY_USER_STYLESHEET_URI + = new StringKey(); + + /** + * The pixel to millimeter conversion factor key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_PIXEL_TO_MM</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">Float</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">0.33</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the pixel to millimeter conversion factor. + * </TD></TR> + * </TABLE> + */ + public static final TranscodingHints.Key KEY_PIXEL_TO_MM + = new FloatKey(); + + /** + * The image background paint key. + * <TABLE BORDER="0" CELLSPACING="0" CELLPADDING="1"> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Key: </TH> + * <TD VALIGN="TOP">KEY_BACKGROUND_COLOR</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Value: </TH> + * <TD VALIGN="TOP">Paint</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Default: </TH> + * <TD VALIGN="TOP">null</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Required: </TH> + * <TD VALIGN="TOP">No</TD></TR> + * <TR> + * <TH VALIGN="TOP" ALIGN="RIGHT"><P ALIGN="RIGHT">Description: </TH> + * <TD VALIGN="TOP">Specify the background color to use. + * The color is required by opaque image formats and is used by + * image formats that support alpha channel.</TD></TR> + * </TABLE> + */ + public static final TranscodingHints.Key KEY_BACKGROUND_COLOR + = new PaintKey(); + +} |