Examples with PDGraphicsState com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState used on opensource projects

Example 1 with PDGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState in project PdfBox-Android by TomRoush.

the class PageDrawer method setStroke.

// set stroke based on the current CTM and the current stroke
private void setStroke() {
    PDGraphicsState state = getGraphicsState();
    // apply the CTM
    float lineWidth = transformWidth(state.getLineWidth());
    // minimum line width as used by Adobe Reader
    if (lineWidth < 0.25) {
        lineWidth = 0.25f;
    }
    PDLineDashPattern dashPattern = state.getLineDashPattern();
    float phaseStart = dashPattern.getPhase();
    float[] dashArray = getDashArray(dashPattern);
    phaseStart = transformWidth(phaseStart);
    // avoid also infinite and NaN values (PDFBOX-3360)
    if (dashArray.length == 0 || Float.isInfinite(phaseStart) || Float.isNaN(phaseStart)) {
        dashArray = null;
    } else {
        for (int i = 0; i < dashArray.length; ++i) {
            if (Float.isInfinite(dashArray[i]) || Float.isNaN(dashArray[i])) {
                dashArray = null;
                break;
            }
        }
    }
    paint.setStrokeWidth(lineWidth);
    paint.setStrokeCap(state.getLineCap());
    paint.setStrokeJoin(state.getLineJoin());
    if (dashArray != null) {
        paint.setPathEffect(new DashPathEffect(dashArray, phaseStart));
    }
}

Example 2 with PDGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState in project PdfBox-Android by TomRoush.

the class PageDrawer method showType3Glyph.

@Override
protected void showType3Glyph(Matrix textRenderingMatrix, PDType3Font font, int code, String unicode, Vector displacement) throws IOException {
    PDGraphicsState state = getGraphicsState();
    RenderingMode renderingMode = state.getTextState().getRenderingMode();
    if (!RenderingMode.NEITHER.equals(renderingMode)) {
        super.showType3Glyph(textRenderingMatrix, font, code, unicode, displacement);
    }
}

Example 3 with PDGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState in project PdfBox-Android by TomRoush.

the class PDFStreamEngine method showText.

/**
 * 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.w("PdfBox-Android", "No current font, will use default");
        font = PDType1Font.HELVETICA;
    }
    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(// 0
    fontSize * horizontalScaling, // 0
    0, // 0
    0, // 0
    fontSize, 0, // 1
    textState.getRise());
    // 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);
        // 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));
    }
}

Example 4 with PDGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState in project PdfBox-Android by TomRoush.

the class PDFStreamEngine method processType3Stream.

/**
 * Processes a Type 3 character stream.
 *
 * @param charProc Type 3 character procedure
 * @param textRenderingMatrix the Text Rendering Matrix
 * @throws IOException if there is an error reading or parsing the character content stream.
 */
protected void processType3Stream(PDType3CharProc charProc, Matrix textRenderingMatrix) throws IOException {
    if (currentPage == null) {
        throw new IllegalStateException("No current page, call " + "#processChildStream(PDContentStream, PDPage) instead");
    }
    PDResources parent = pushResources(charProc);
    Deque<PDGraphicsState> savedStack = saveGraphicsStack();
    // replace the CTM with the TRM
    getGraphicsState().setCurrentTransformationMatrix(textRenderingMatrix);
    // transform the CTM using the stream's matrix (this is the FontMatrix)
    getGraphicsState().getCurrentTransformationMatrix().concatenate(charProc.getMatrix());
    // note: we don't clip to the BBox as it is often wrong, see PDFBOX-1917
    // save text matrices (Type 3 stream may contain BT/ET, see PDFBOX-2137)
    Matrix textMatrixOld = textMatrix;
    textMatrix = new Matrix();
    Matrix textLineMatrixOld = textLineMatrix;
    textLineMatrix = new Matrix();
    processStreamOperators(charProc);
    // restore text matrices
    textMatrix = textMatrixOld;
    textLineMatrix = textLineMatrixOld;
    restoreGraphicsStack(savedStack);
    popResources(parent);
}

Example 5 with PDGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDGraphicsState in project PdfBox-Android by TomRoush.

the class PDFStreamEngine method processStream.

/**
 * Process a content stream.
 *
 * @param contentStream the content stream
 * @throws IOException if there is an exception while processing the stream
 */
private void processStream(PDContentStream contentStream) throws IOException {
    PDResources parent = pushResources(contentStream);
    Deque<PDGraphicsState> savedStack = saveGraphicsStack();
    Matrix parentMatrix = initialMatrix;
    // transform the CTM using the stream's matrix
    getGraphicsState().getCurrentTransformationMatrix().concatenate(contentStream.getMatrix());
    // the stream's initial matrix includes the parent CTM, e.g. this allows a scaled form
    initialMatrix = getGraphicsState().getCurrentTransformationMatrix().clone();
    // clip to bounding box
    PDRectangle bbox = contentStream.getBBox();
    clipToRect(bbox);
    processStreamOperators(contentStream);
    initialMatrix = parentMatrix;
    restoreGraphicsStack(savedStack);
    popResources(parent);
}