Example usage for org.apache.pdfbox.pdmodel.interactive.annotation PDAppearanceStream getMatrix

Introduction

In this page you can find the example usage for org.apache.pdfbox.pdmodel.interactive.annotation PDAppearanceStream getMatrix.

Prototype

@Override
public Matrix getMatrix() 

Source Link

Document

This will get the optional matrix of an XObjectForm.

Usage

From source file:chiliad.parser.pdf.extractor.vectorgraphics.VectorGraphicsExtractor.java

License:Apache License

@Override
public MPage extract(PDPage pageToExtract, MPage pageContent) {
    try {//from w ww  . ja v  a  2  s.c om
        if (pageToExtract.getContents() == null) {
            throw new ExtractorException("Contents is null.");
        }

        pageSize = pageToExtract.findMediaBox().createDimension();
        graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
                RenderingHints.VALUE_FRACTIONALMETRICS_ON);
        // initialize the used stroke with CAP_BUTT instead of CAP_SQUARE
        graphics.setStroke(new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER));
        // Only if there is some content, we have to process it.
        // Otherwise we are done here and we will produce an empty page

        PDResources resources = pageToExtract.findResources();
        processStream(pageToExtract, resources, pageToExtract.getContents().getStream());

        List<PDAnnotation> annotations = pageToExtract.getAnnotations();
        for (PDAnnotation annotation : annotations) {
            PDAnnotation annot = (PDAnnotation) annotation;
            PDRectangle rect = annot.getRectangle();
            String appearanceName = annot.getAppearanceStream();
            PDAppearanceDictionary appearDictionary = annot.getAppearance();
            if (appearDictionary != null) {
                if (appearanceName == null) {
                    appearanceName = "default";
                }
                Map<String, PDAppearanceStream> appearanceMap = appearDictionary.getNormalAppearance();
                if (appearanceMap != null) {
                    PDAppearanceStream appearance = (PDAppearanceStream) appearanceMap.get(appearanceName);
                    if (appearance != null) {
                        Point2D point = new Point2D.Float(rect.getLowerLeftX(), rect.getLowerLeftY());
                        Matrix matrix = appearance.getMatrix();
                        if (matrix != null) {
                            // transform the rectangle using the given matrix
                            AffineTransform at = matrix.createAffineTransform();
                            at.transform(point, point);
                        }
                        graphics.translate((int) point.getX(), -(int) point.getY());
                        processSubStream(pageToExtract, appearance.getResources(), appearance.getStream());
                        graphics.translate(-(int) point.getX(), (int) point.getY());
                    }
                }
            }
        }
        return handleResult(graphics, pageContent);
    } catch (IOException ex) {
        throw new ExtractorException("Failed to extract vector graphics.", ex);
    }
}

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