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svg is a module for iText7 that allows you to integrate SVG images in your PDF creation and manipulation process
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2018 iText Group NV
Authors: iText Software.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.svg.renderers.impl;
import com.itextpdf.kernel.geom.AffineTransform;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfArray;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.styledxmlparser.css.util.CssUtils;
import com.itextpdf.svg.SvgTagConstants;
import com.itextpdf.svg.exceptions.SvgLogMessageConstant;
import com.itextpdf.svg.exceptions.SvgProcessingException;
import com.itextpdf.svg.renderers.ISvgNodeRenderer;
import com.itextpdf.svg.renderers.SvgDrawContext;
import com.itextpdf.svg.utils.SvgCssUtils;
import com.itextpdf.svg.utils.TransformUtils;
/**
* {@link ISvgNodeRenderer} implementation for the <svg> tag.
*/
public class SvgSvgNodeRenderer extends AbstractBranchSvgNodeRenderer {
private boolean outermost = true;
@Override
protected void doDraw(SvgDrawContext context) {
// we need to know if we are processing the outermost svg element
// if this renderer's parent is null than we know we're in the outermost svg tag
// this is important to set portX, portY, portWidth, and portHeight values
this.outermost = this.getParent() == null;
// TODO RND-877
context.addViewPort(this.calculateViewPort(context));
PdfCanvas currentCanvas = context.getCurrentCanvas();
currentCanvas.concatMatrix(this.calculateTransformation(context));
super.doDraw(context);
}
/**
* Calculate the transformation based on the context. If this renderer is the outermost renderer,
* we need to flip on the vertical axis and translate the height of the viewport
*
* @param context the SVG draw context
* @return the transformation that needs to be applied to this renderer
*/
AffineTransform calculateTransformation(SvgDrawContext context) {
Rectangle viewPort = context.getCurrentViewPort();
AffineTransform transform;
if ( outermost) {
float vertical = viewPort.getY() + viewPort.getHeight();
// flip coordinate space vertically and translate on the y axis with the viewport height
transform = TransformUtils.parseTransform("matrix(1 0 0 -1 " + SvgCssUtils.convertFloatToString(viewPort.getX()) + " " + SvgCssUtils.convertFloatToString(vertical));
} else {
transform = AffineTransform.getTranslateInstance(viewPort.getX(), viewPort.getY());
}
return transform;
}
/**
* Calculate the viewport based on the context.
*
* @param context the SVG draw context
* @return the viewport that applies to this renderer
*/
Rectangle calculateViewPort(SvgDrawContext context) {
Rectangle currentViewPort = outermost ? null : context.getCurrentViewPort();
float portX = 0f;
float portY = 0f;
float portWidth = 0f;
float portHeight = 0f;
if (outermost) {
PdfStream contentStream = context.getCurrentCanvas().getContentStream();
if ( ! contentStream.containsKey(PdfName.BBox) ) {
throw new SvgProcessingException(SvgLogMessageConstant.ROOT_SVG_NO_BBOX);
}
PdfArray bboxArray = contentStream.getAsArray(PdfName.BBox);
portX = bboxArray.getAsNumber(0).floatValue();
portY = bboxArray.getAsNumber(1).floatValue();
portWidth = bboxArray.getAsNumber(2).floatValue() - portX;
portHeight = bboxArray.getAsNumber(3).floatValue() - portY;
} else {
// set default values to parent viewport in the case of a nested svg tag
portX = currentViewPort.getX();
portY = currentViewPort.getY();
portWidth = currentViewPort.getWidth(); // default should be parent portWidth if not outermost
portHeight = currentViewPort.getHeight(); // default should be parent heigth if not outermost
}
if (attributesAndStyles != null) {
if (!outermost) {
if (attributesAndStyles.containsKey(SvgTagConstants.X)) {
portX = CssUtils.parseAbsoluteLength(attributesAndStyles.get(SvgTagConstants.X));
}
if (attributesAndStyles.containsKey(SvgTagConstants.Y)) {
portY = CssUtils.parseAbsoluteLength(attributesAndStyles.get(SvgTagConstants.Y));
}
if (attributesAndStyles.containsKey(SvgTagConstants.WIDTH)) {
portWidth = CssUtils.parseAbsoluteLength(attributesAndStyles.get(SvgTagConstants.WIDTH));
}
if (attributesAndStyles.containsKey(SvgTagConstants.HEIGHT)) {
portHeight = CssUtils.parseAbsoluteLength(attributesAndStyles.get(SvgTagConstants.HEIGHT));
}
}
}
return new Rectangle(portX, portY, portWidth, portHeight);
}
}