Example usage for org.apache.pdfbox.util Matrix getScaleY

Introduction

In this page you can find the example usage for org.apache.pdfbox.util Matrix getScaleY.

Prototype

public float getScaleY() 

Source Link

Document

Returns the y-scaling element of this matrix.

Usage

From source file:at.gv.egiz.pdfas.lib.impl.pdfbox2.placeholder.SignaturePlaceholderExtractor.java

License:EUPL

@Override
protected void processOperator(Operator operator, List<COSBase> arguments) throws IOException {
    String operation = operator.getName();
    if (operation.equals("Do")) {
        COSName objectName = (COSName) arguments.get(0);
        PDXObject xobject = (PDXObject) getResources().getXObject(objectName);
        if (xobject instanceof PDImageXObject) {
            try {
                PDImageXObject image = (PDImageXObject) xobject;
                SignaturePlaceholderData data = checkImage(image);
                if (data != null) {
                    PDPage page = getCurrentPage();
                    Matrix ctm = getGraphicsState().getCurrentTransformationMatrix();
                    int pageRotation = page.getRotation();
                    pageRotation = pageRotation % 360;
                    double rotationInRadians = Math.toRadians(pageRotation);//(page.findRotation() * Math.PI) / 180;

                    AffineTransform rotation = new AffineTransform();
                    rotation.setToRotation(rotationInRadians);
                    AffineTransform rotationInverse = rotation.createInverse();
                    Matrix rotationInverseMatrix = new Matrix();
                    rotationInverseMatrix.setFromAffineTransform(rotationInverse);
                    Matrix rotationMatrix = new Matrix();
                    rotationMatrix.setFromAffineTransform(rotation);

                    Matrix unrotatedCTM = ctm.multiply(rotationInverseMatrix);

                    float x = unrotatedCTM.getXPosition();
                    float yPos = unrotatedCTM.getYPosition();
                    float yScale = unrotatedCTM.getScaleY();
                    float y = yPos + yScale;
                    float w = unrotatedCTM.getScaleX();
                    ;/*from w  ww  . j ava  2 s  .  co  m*/

                    logger.debug("Page height: {}", page.getCropBox().getHeight());
                    logger.debug("Page width: {}", page.getCropBox().getWidth());

                    if (pageRotation == 90) {
                        y = page.getCropBox().getWidth() - (y * (-1));
                    } else if (pageRotation == 180) {
                        x = page.getCropBox().getWidth() + x;
                        y = page.getCropBox().getHeight() - (y * (-1));
                    } else if (pageRotation == 270) {
                        x = page.getCropBox().getHeight() + x;
                    }

                    String posString = "p:" + currentPage + ";x:" + x + ";y:" + y + ";w:" + w;

                    logger.debug("Found Placeholder at: {}", posString);
                    try {
                        data.setTablePos(new TablePos(posString));
                        data.setPlaceholderName(objectName.getName());
                        placeholders.add(data);
                    } catch (PdfAsException e) {
                        throw new IOException();
                    }
                }
            } catch (NoninvertibleTransformException e) {
                throw new IOException(e);
            }
        }
    } else {
        super.processOperator(operator, arguments);
    }
}

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