Java Code Examples for org.apache.pdfbox.util.Matrix#concatenate()

private void intersectShadingBBox(PDColor color, Area area) throws IOException
{
    if (color.getColorSpace() instanceof PDPattern)
    {
        PDColorSpace colorSpace = color.getColorSpace();
        PDAbstractPattern pat = ((PDPattern) colorSpace).getPattern(color);
        if (pat instanceof PDShadingPattern)
        {
            PDShading shading = ((PDShadingPattern) pat).getShading();
            PDRectangle bbox = shading.getBBox();
            if (bbox != null)
            {
                Matrix m = Matrix.concatenate(getInitialMatrix(), pat.getMatrix());
                Area bboxArea = new Area(bbox.transform(m));
                area.intersect(bboxArea);
            }
        }
    }
}
 

@Override
public void process(Operator operator, List<COSBase> arguments) throws MissingOperandException
{
    if (arguments.size() < 2)
    {
        throw new MissingOperandException(operator, arguments);
    }
    Matrix textLineMatrix = context.getTextLineMatrix();
    if (textLineMatrix == null)
    {
        LOG.warn("TextLineMatrix is null, " + getName() + " operator will be ignored");
        return;
    }        
    
    COSBase base0 = arguments.get(0);
    COSBase base1 = arguments.get(1);
    if (!(base0 instanceof COSNumber))
    {
        return;
    }
    if (!(base1 instanceof COSNumber))
    {
        return;
    }
    COSNumber x = (COSNumber) base0;
    COSNumber y = (COSNumber) base1;

    Matrix matrix = new Matrix(1, 0, 0, 1, x.floatValue(), y.floatValue());
    textLineMatrix.concatenate(matrix);
    context.setTextMatrix(textLineMatrix.clone());
}
 

/**
 * Returns the pattern image in parent stream coordinates.
 */
private BufferedImage getImage(PageDrawer drawer, PDTilingPattern pattern, PDColorSpace colorSpace, 
        PDColor color, AffineTransform xform, Rectangle2D anchorRect) throws IOException
{
    float width = (float) Math.abs(anchorRect.getWidth());
    float height = (float) Math.abs(anchorRect.getHeight());

    // device scale transform (i.e. DPI) (see PDFBOX-1466.pdf)
    Matrix xformMatrix = new Matrix(xform);
    float xScale = Math.abs(xformMatrix.getScalingFactorX());
    float yScale = Math.abs(xformMatrix.getScalingFactorY());
    width *= xScale;
    height *= yScale;

    int rasterWidth = Math.max(1, ceiling(width));
    int rasterHeight = Math.max(1, ceiling(height));

    BufferedImage image = new BufferedImage(rasterWidth, rasterHeight, BufferedImage.TYPE_INT_ARGB);

    Graphics2D graphics = image.createGraphics();

    // flip a -ve YStep around its own axis (see gs-bugzilla694385.pdf)
    if (pattern.getYStep() < 0)
    {
        graphics.translate(0, rasterHeight);
        graphics.scale(1, -1);
    }

    // flip a -ve XStep around its own axis
    if (pattern.getXStep() < 0)
    {
        graphics.translate(rasterWidth, 0);
        graphics.scale(-1, 1);
    }

    // device scale transform (i.e. DPI)
    graphics.scale(xScale, yScale);

    // apply only the scaling from the pattern transform, doing scaling here improves the
    // image quality and prevents large scale-down factors from creating huge tiling cells.
    Matrix newPatternMatrix;
    newPatternMatrix = Matrix.getScaleInstance(
            Math.abs(patternMatrix.getScalingFactorX()),
            Math.abs(patternMatrix.getScalingFactorY()));

    // move origin to (0,0)
    newPatternMatrix.concatenate(
            Matrix.getTranslateInstance(-pattern.getBBox().getLowerLeftX(),
                    -pattern.getBBox().getLowerLeftY()));

    // render using PageDrawer
    drawer.drawTilingPattern(graphics, pattern, colorSpace, color, newPatternMatrix);
    graphics.dispose();

    return image;
}
 

/**
 * Process the given annotation with the specified appearance stream.
 *
 * @param annotation The annotation containing the appearance stream to process.
 * @param appearance The appearance stream to process.
 * @throws IOException If there is an error reading or parsing the appearance content stream.
 */
protected void processAnnotation(PDAnnotation annotation, PDAppearanceStream appearance)
        throws IOException
{
    PDResources parent = pushResources(appearance);
    Deque<PDGraphicsState> savedStack = saveGraphicsStack();

    PDRectangle bbox = appearance.getBBox();
    PDRectangle rect = annotation.getRectangle();
    Matrix matrix = appearance.getMatrix();

    // zero-sized rectangles are not valid
    if (rect != null && rect.getWidth() > 0 && rect.getHeight() > 0 && bbox != null)
    {
        // transformed appearance box  fixme: may be an arbitrary shape
        Rectangle2D transformedBox = bbox.transform(matrix).getBounds2D();

        // compute a matrix which scales and translates the transformed appearance box to align
        // with the edges of the annotation's rectangle
        Matrix a = Matrix.getTranslateInstance(rect.getLowerLeftX(), rect.getLowerLeftY());
        a.concatenate(Matrix.getScaleInstance((float)(rect.getWidth() / transformedBox.getWidth()),
                (float)(rect.getHeight() / transformedBox.getHeight())));
        a.concatenate(Matrix.getTranslateInstance((float) -transformedBox.getX(),
                (float) -transformedBox.getY()));

        // Matrix shall be concatenated with A to form a matrix AA that maps from the appearance's
        // coordinate system to the annotation's rectangle in default user space
        //
        // HOWEVER only the opposite order works for rotated pages with 
        // filled fields / annotations that have a matrix in the appearance stream, see PDFBOX-3083
        Matrix aa = Matrix.concatenate(a, matrix);

        // make matrix AA the CTM
        getGraphicsState().setCurrentTransformationMatrix(aa);

        // clip to bounding box
        clipToRect(bbox);

        // needed for patterns in appearance streams, e.g. PDFBOX-2182
        initialMatrix = aa.clone();

        processStreamOperators(appearance);
    }
    
    restoreGraphicsStack(savedStack);
    popResources(parent);
}
 

/**
 * Process the given annotation with the specified appearance stream.
 *
 * @param annotation The annotation containing the appearance stream to process.
 * @param appearance The appearance stream to process.
 * @throws IOException If there is an error reading or parsing the appearance content stream.
 */
protected void processAnnotation(PDAnnotation annotation, PDAppearanceStream appearance)
        throws IOException
{
    PDResources parent = pushResources(appearance);
    Deque<PDGraphicsState> savedStack = saveGraphicsStack();

    PDRectangle bbox = appearance.getBBox();
    PDRectangle rect = annotation.getRectangle();
    Matrix matrix = appearance.getMatrix();

    // zero-sized rectangles are not valid
    if (rect != null && rect.getWidth() > 0 && rect.getHeight() > 0 && bbox != null)
    {
        // transformed appearance box  fixme: may be an arbitrary shape
        Rectangle2D transformedBox = bbox.transform(matrix).getBounds2D();

        // compute a matrix which scales and translates the transformed appearance box to align
        // with the edges of the annotation's rectangle
        Matrix a = Matrix.getTranslateInstance(rect.getLowerLeftX(), rect.getLowerLeftY());
        a.concatenate(Matrix.getScaleInstance((float)(rect.getWidth() / transformedBox.getWidth()),
                (float)(rect.getHeight() / transformedBox.getHeight())));
        a.concatenate(Matrix.getTranslateInstance((float) -transformedBox.getX(),
                (float) -transformedBox.getY()));

        // Matrix shall be concatenated with A to form a matrix AA that maps from the appearance's
        // coordinate system to the annotation's rectangle in default user space
        //
        // HOWEVER only the opposite order works for rotated pages with 
        // filled fields / annotations that have a matrix in the appearance stream, see PDFBOX-3083
        Matrix aa = Matrix.concatenate(a, matrix);

        // make matrix AA the CTM
        getGraphicsState().setCurrentTransformationMatrix(aa);

        // clip to bounding box
        clipToRect(bbox);

        // needed for patterns in appearance streams, e.g. PDFBOX-2182
        initialMatrix = aa.clone();

        processStreamOperators(appearance);
    }
    
    restoreGraphicsStack(savedStack);
    popResources(parent);
}
 

/**
 * Creates a new tiling Paint. The parameters color and colorSpace must be null for a colored
 * tiling Paint (because it has its own colors), and non null for an uncolored tiling Paint.
 *
 * @param drawer renderer to render the page
 * @param pattern tiling pattern dictionary
 * @param colorSpace color space for this tiling
 * @param color color for this tiling
 * @param xform device scale transform
 *
 * @throws java.io.IOException if something goes wrong while drawing the pattern
 */
TilingPaint(PageDrawer drawer, PDTilingPattern pattern, PDColorSpace colorSpace,
                   PDColor color, AffineTransform xform) throws IOException
{
    // pattern space -> user space
    patternMatrix = Matrix.concatenate(drawer.getInitialMatrix(), pattern.getMatrix());
    Rectangle2D anchorRect = getAnchorRect(pattern);
    paint = new TexturePaint(getImage(drawer, pattern, colorSpace, color, xform, anchorRect), anchorRect);
}