Class PdfGraphicExporter


  • public abstract class PdfGraphicExporter
    extends GraphicExporter
    GraphicExporter implementation that exports to PDF format. The best way to turn fonts are turned into graphics in PDFs is not obvious, so this class parameterises the options. Static members provide ways of getting useful instances.
    Since:
    12 Feb 2013
    Author:
    Mark Taylor
    • Field Detail

      • BASIC

        public static PdfGraphicExporter BASIC
        Exporter which uses the default font mapper. OK for standard fonts.
      • GLYPH_TEXT

        public static PdfGraphicExporter GLYPH_TEXT
        Exporter which writes text as shapes not using fonts. Will generate reasonable output for any font without additional preparation. However, the output shapes are not perfect (visible only at huge magnification) and it may be less efficient if there's a lot of text (though possibly more efficient if there's very little).
    • Constructor Detail

      • PdfGraphicExporter

        protected PdfGraphicExporter()
        Constructor.
    • Method Detail

      • createExternalFontExporter

        public static PdfGraphicExporter createExternalFontExporter​(java.net.URL fontsUrl)
        Returns an exporter which uses externally stored fonts. Output is perfect. A location must be provided for a resource giving a list of font locations. If the fonts can't be found, behaviour reverts to that of GLYPH_TEXT.
        Parameters:
        fontsUrl - location of a text file of font resource strings (typically file names or URLs of .ttf files)
        Returns:
        new exporter using external fonts
      • exportGraphic

        public void exportGraphic​(Picture picture,
                                  java.io.OutputStream out)
                           throws java.io.IOException
        Description copied from class: GraphicExporter
        Paints the given picture to an output stream using some graphics format or other. This method should not close the stream.
        Specified by:
        exportGraphic in class GraphicExporter
        Parameters:
        picture - picture to draw
        out - destination output stream
        Throws:
        java.io.IOException
      • createGraphics

        public abstract java.awt.Graphics2D createGraphics​(com.lowagie.text.pdf.PdfContentByte pcb,
                                                           int width,
                                                           int height)
        Returns a graphics context which can be used to write to a given PDF content object. There is not a single obvious implementation of this method; the best way to do it depends on how text glyphs are to be rendered.
        Parameters:
        pcb - PDF content object
        width - in pixels
        height - in pixels
        Returns:
        new graphics context