Example usage for com.itextpdf.text.pdf PdfGState BM_NORMAL

Introduction

In this page you can find the example usage for com.itextpdf.text.pdf PdfGState BM_NORMAL.

Prototype

PdfName BM_NORMAL

To view the source code for com.itextpdf.text.pdf PdfGState BM_NORMAL.

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Document

A possible blend mode

Usage

From source file:com.vectorprint.report.itext.style.stylers.AdvancedImpl.java

License:Open Source License

/**
 * get a canvas for drawing, prepared according to settings
 *
 * @see #draw(com.itextpdf.text.Rectangle, java.lang.String) 
 * @return/*www.  j a  v a  2  s. c o m*/
 */
protected final PdfContentByte getPreparedCanvas(float opacity) {
    needRestore = false;
    PdfContentByte canvas = (tableForeground != null) ? tableForeground
            : (isBg()) ? getWriter().getDirectContentUnder() : getWriter().getDirectContent();
    String layerName = getLayerName();
    BLENDMODE blend = getBlend();
    if (getWriter().getPDFXConformance() == PdfWriter.PDFX1A2001) {
        // check blend, opacity, layers
        if (!PdfGState.BM_NORMAL.equals(blend.getBlend())
                && !PdfGState.BM_COMPATIBLE.equals(blend.getBlend())) {
            throw new VectorPrintRuntimeException("blend not supported in PDF/X-1a: " + blend);
        }
        if (layerName != null) {
            throw new VectorPrintRuntimeException("layers not supported in PDF/X-1a: " + layerName);
        }
        if (opacity < 1) {
            throw new VectorPrintRuntimeException("opacity not supported in PDF/X-1a: " + opacity);
        }
    }
    if (layerName != null) {
        layerManager.startLayerInGroup(layerName, canvas);
    }
    //                pgs.setAlphaIsShape(true);
    if (opacity <= 1) {
        //                        PdfShading shading = PdfShading.simpleAxial(getWriter(), 0, 0, getDocument().right() - getDocument().getPageSize().getWidth() * 0.6f, getDocument().top() - getDocument().getPageSize().getHeight() * 0.6f, Color.green, Color.orange,true,true);
        //                        canvas.paintShading(shading);
        canvas.saveState();
        needRestore = true;
        PdfGState pgs = new PdfGState();
        pgs.setFillOpacity(opacity);
        pgs.setStrokeOpacity(opacity);
        canvas.setGState(pgs);
    }
    if (!BLENDMODE.NORMAL.equals(blend)) {
        if (!needRestore) {
            canvas.saveState();
            needRestore = true;
        }
        PdfGState pgs = new PdfGState();
        pgs.setBlendMode(blend.getBlend());
        canvas.setGState(pgs);
    }
    if (getTransform() != null && !(this instanceof Image)) {
        canvas.transform(new AffineTransform(getTransform()));
    }
    return canvas;
}

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