Java Code Examples for org.apache.pdfbox.pdmodel.font.PDFont#isVertical()

/**
 * Render the font using the Glyph2D interface.
 * 
 * @param glyph2D the Glyph2D implementation provided a GeneralPath for each glyph
 * @param font the font
 * @param code character code
 * @param displacement the glyph's displacement (advance)
 * @param at the transformation
 * @throws IOException if something went wrong
 */
private void drawGlyph2D(Glyph2D glyph2D, PDFont font, int code, Vector displacement,
                         AffineTransform at) throws IOException
{
    PDGraphicsState state = getGraphicsState();
    RenderingMode renderingMode = state.getTextState().getRenderingMode();

    GeneralPath path = glyph2D.getPathForCharacterCode(code);
    if (path != null)
    {
        // Stretch non-embedded glyph if it does not match the height/width contained in the PDF.
        // Vertical fonts have zero X displacement, so the following code scales to 0 if we don't skip it.
        // TODO: How should vertical fonts be handled?
        if (!font.isEmbedded() && !font.isVertical() && !font.isStandard14() && font.hasExplicitWidth(code))
        {
            float fontWidth = font.getWidthFromFont(code);
            if (fontWidth > 0 && // ignore spaces
                    Math.abs(fontWidth - displacement.getX() * 1000) > 0.0001)
            {
                float pdfWidth = displacement.getX() * 1000;
                at.scale(pdfWidth / fontWidth, 1);
            }
        }

        // render glyph
        Shape glyph = at.createTransformedShape(path);

        if (renderingMode.isFill())
        {
            graphics.setComposite(state.getNonStrokingJavaComposite());
            graphics.setPaint(getNonStrokingPaint());
            setClip();
            if (isContentRendered())
            {
                graphics.fill(glyph);
            }
        }

        if (renderingMode.isStroke())
        {
            graphics.setComposite(state.getStrokingJavaComposite());
            graphics.setPaint(getStrokingPaint());
            graphics.setStroke(getStroke());
            setClip();
            if (isContentRendered())
            {
                graphics.draw(glyph);
            }
        }

        if (renderingMode.isClip())
        {
            textClippings.add(glyph);
        }
    }
}
 

/**
 * Called when a string of text with spacing adjustments is to be shown.
 *
 * @param array array of encoded text strings and adjustments
 * @throws IOException if there was an error showing the text
 */
public void showTextStrings(COSArray array) throws IOException
{
    PDTextState textState = getGraphicsState().getTextState();
    float fontSize = textState.getFontSize();
    float horizontalScaling = textState.getHorizontalScaling() / 100f;
    PDFont font = textState.getFont();
    boolean isVertical = false;
    if (font != null)
    {
        isVertical = font.isVertical();
    }

    for (COSBase obj : array)
    {
        if (obj instanceof COSNumber)
        {
            float tj = ((COSNumber)obj).floatValue();

            // calculate the combined displacements
            float tx;
            float ty;
            if (isVertical)
            {
                tx = 0;
                ty = -tj / 1000 * fontSize;
            }
            else
            {
                tx = -tj / 1000 * fontSize * horizontalScaling;
                ty = 0;
            }

            applyTextAdjustment(tx, ty);
        }
        else if(obj instanceof COSString)
        {
            byte[] string = ((COSString)obj).getBytes();
            showText(string);
        }
        else
        {
            throw new IOException("Unknown type in array for TJ operation:" + obj);
        }
    }
}
 

/**
 * Process text from the PDF Stream. You should override this method if you want to
 * perform an action when encoded text is being processed.
 *
 * @param string the encoded text
 * @throws IOException if there is an error processing the string
 */
protected void showText(byte[] string) throws IOException
{
    PDGraphicsState state = getGraphicsState();
    PDTextState textState = state.getTextState();

    // get the current font
    PDFont font = textState.getFont();
    if (font == null)
    {
        LOG.warn("No current font, will use default");
        font = PDFontFactory.createDefaultFont();
    }

    float fontSize = textState.getFontSize();
    float horizontalScaling = textState.getHorizontalScaling() / 100f;
    float charSpacing = textState.getCharacterSpacing();

    // put the text state parameters into matrix form
    Matrix parameters = new Matrix(
            fontSize * horizontalScaling, 0, // 0
            0, fontSize,                     // 0
            0, textState.getRise());         // 1

    // read the stream until it is empty
    InputStream in = new ByteArrayInputStream(string);
    while (in.available() > 0)
    {
        // decode a character
        int before = in.available();
        int code = font.readCode(in);
        int codeLength = before - in.available();
        String unicode = font.toUnicode(code);

        // Word spacing shall be applied to every occurrence of the single-byte character code
        // 32 in a string when using a simple font or a composite font that defines code 32 as
        // a single-byte code.
        float wordSpacing = 0;
        if (codeLength == 1 && code == 32)
        {
            wordSpacing += textState.getWordSpacing();
        }

        // text rendering matrix (text space -> device space)
        Matrix ctm = state.getCurrentTransformationMatrix();
        Matrix textRenderingMatrix = parameters.multiply(textMatrix).multiply(ctm);

        // get glyph's position vector if this is vertical text
        // changes to vertical text should be tested with PDFBOX-2294 and PDFBOX-1422
        if (font.isVertical())
        {
            // position vector, in text space
            Vector v = font.getPositionVector(code);

            // apply the position vector to the horizontal origin to get the vertical origin
            textRenderingMatrix.translate(v);
        }

        // get glyph's horizontal and vertical displacements, in text space
        Vector w = font.getDisplacement(code);

        // process the decoded glyph
        saveGraphicsState();
        Matrix textMatrixOld = textMatrix;
        Matrix textLineMatrixOld = textLineMatrix;
        showGlyph(textRenderingMatrix, font, code, unicode, w);
        textMatrix = textMatrixOld;
        textLineMatrix = textLineMatrixOld;
        restoreGraphicsState();

        // calculate the combined displacements
        float tx;
        float ty;
        if (font.isVertical())
        {
            tx = 0;
            ty = w.getY() * fontSize + charSpacing + wordSpacing;
        }
        else
        {
            tx = (w.getX() * fontSize + charSpacing + wordSpacing) * horizontalScaling;
            ty = 0;
        }

        // update the text matrix
        textMatrix.concatenate(Matrix.getTranslateInstance(tx, ty));
    }
}