Examples with PDGraphicsState org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState used on opensource projects

Example 6 with PDGraphicsState

use of org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState in project pdfbox by apache.

the class PDFStreamEngine method initPage.

/**
 * Initialises the stream engine for the given page.
 */
private void initPage(PDPage page) {
    if (page == null) {
        throw new IllegalArgumentException("Page cannot be null");
    }
    currentPage = page;
    graphicsStack.clear();
    graphicsStack.push(new PDGraphicsState(page.getCropBox()));
    textMatrix = null;
    textLineMatrix = null;
    resources = null;
    initialMatrix = page.getMatrix();
}

Example 7 with PDGraphicsState

use of org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState in project pdfbox by apache.

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);
    Stack<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);
}

Example 8 with PDGraphicsState

use of org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState in project pdfbox by apache.

the class PDFStreamEngine method processTilingPattern.

/**
 * Process the given tiling pattern. Allows the pattern matrix to be overridden for custom
 * rendering.
 *
 * @param tilingPattern the tiling pattern
 * @param color color to use, if this is an uncoloured pattern, otherwise null.
 * @param colorSpace color space to use, if this is an uncoloured pattern, otherwise null.
 * @param patternMatrix the pattern matrix, may be overridden for custom rendering.
 * @throws IOException if there is an error reading or parsing the tiling pattern content stream.
 */
protected final void processTilingPattern(PDTilingPattern tilingPattern, PDColor color, PDColorSpace colorSpace, Matrix patternMatrix) throws IOException {
    PDResources parent = pushResources(tilingPattern);
    Matrix parentMatrix = initialMatrix;
    initialMatrix = Matrix.concatenate(initialMatrix, patternMatrix);
    // save the original graphics state
    Stack<PDGraphicsState> savedStack = saveGraphicsStack();
    // save a clean state (new clipping path, line path, etc.)
    Rectangle2D bbox = tilingPattern.getBBox().transform(patternMatrix).getBounds2D();
    PDRectangle rect = new PDRectangle((float) bbox.getX(), (float) bbox.getY(), (float) bbox.getWidth(), (float) bbox.getHeight());
    graphicsStack.push(new PDGraphicsState(rect));
    // non-colored patterns have to be given a color
    if (colorSpace != null) {
        color = new PDColor(color.getComponents(), colorSpace);
        getGraphicsState().setNonStrokingColorSpace(colorSpace);
        getGraphicsState().setNonStrokingColor(color);
        getGraphicsState().setStrokingColorSpace(colorSpace);
        getGraphicsState().setStrokingColor(color);
    }
    // transform the CTM using the stream's matrix
    getGraphicsState().getCurrentTransformationMatrix().concatenate(patternMatrix);
    // clip to bounding box
    clipToRect(tilingPattern.getBBox());
    processStreamOperators(tilingPattern);
    initialMatrix = parentMatrix;
    restoreGraphicsStack(savedStack);
    popResources(parent);
}

Example 9 with PDGraphicsState

use of org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState in project pdfbox by apache.

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.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(// 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, 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 10 with PDGraphicsState

use of org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState in project pdfbox by apache.

the class PageDrawer method getStroke.

// create a new stroke based on the current CTM and the current stroke
private BasicStroke getStroke() {
    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();
    int phaseStart = dashPattern.getPhase();
    float[] dashArray = dashPattern.getDashArray();
    // apply the CTM
    for (int i = 0; i < dashArray.length; ++i) {
        // minimum line dash width avoids JVM crash,
        // see PDFBOX-2373, PDFBOX-2929, PDFBOX-3204, PDFBOX-3813
        // also avoid 0 in array like "[ 0 1000 ] 0 d", see PDFBOX-3724
        float w = transformWidth(dashArray[i]);
        dashArray[i] = Math.max(w, 0.062f);
    }
    phaseStart = (int) 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;
            }
        }
    }
    return new BasicStroke(lineWidth, state.getLineCap(), state.getLineJoin(), state.getMiterLimit(), dashArray, phaseStart);
}