Java 类com.itextpdf.text.ImgTemplate 实例源码

private List<Element> renderGral(String raw) throws BadElementException, IOException {
    ChartDescriptor descriptor = new ChartDescriptorParser().parse(raw);

    PdfContentByte cb = writer.get().getDirectContent();
    float width = (float) descriptor.getWidth();
    float height = (float) descriptor.getHeight();

    PdfTemplate template = cb.createTemplate(width, height);
    Graphics2D g2 = new PdfGraphics2D(template, width, height);

    GralRenderer renderer = new GralRenderer();
    renderer.render(g2, descriptor);

    ArrayList<Element> elements = new ArrayList<Element>(1);
    elements.add(new ImgTemplate(template));
    return elements;
}

@Override
public void emit(SourceCode sourceCode, ITextContext context) {
    String lang = sourceCode.lang();
    String code = sourceCode.content();

    try {
        String trimmed = Strings.unindentBlock(code);

        log.debug("Initializing text grid");
        TeXFormula formula = new TeXFormula(trimmed);
        TeXIcon teXIcon = formula.createTeXIcon(TeXConstants.STYLE_DISPLAY, 14f);
        teXIcon.setInsets(new Insets(1, 1, 1, 1));
        teXIcon.setForeground(foreground);

        PdfWriter pdfWriter = context.getPdfWriter();
        PdfContentByte cb = pdfWriter.getDirectContent();
        float width = (float) teXIcon.getIconWidth();
        float height = (float) teXIcon.getIconHeight();

        PdfTemplate template = cb.createTemplate(width, height);
        Graphics2D g2 = new PdfGraphics2D(template, width, height, new JLaTeXmathFontMapper());

        log.debug("Rendering formula");
        teXIcon.paintIcon(null, g2, 0, 0);
        g2.dispose();

        log.debug("Rendering diagram done");
        ImgTemplate imgTemplate = new ImgTemplate(template);
        scaleToFit(imgTemplate, context.getDocumentArtBox());

        context.append(imgTemplate);

    } catch (Exception e) {
        throw new WrappedRuntimeException(e);
    }

}