Examples of PdfFunction

com.lowagie.text.pdf.PdfFunction
Implements PDF functions. @author Paulo Soares (psoares@consiste.pt)
com.sun.pdfview.function.PDFFunction
PDF Functions are defined in the reference as Section 3.9.

A PDF function maps some set of m inputs into some set of n outputs. There are 4 types of functions:
- Type 0: Sampled functions. (PDF 1.2)
  A sampled function (type 0) uses a table of sample values to define the function. Various techniques are used to interpolate values between the sample values (see Section 3.9.1, "Type 0 (Sampled) Functions").
- Type 2: Exponential Interpolation. (PDF 1.3)
  An exponential interpolation function (type 2) defines a set of coefficients for an exponential function (see Section 3.9.2, "Type 2 (Exponential Interpolation) Functions").
- Type 3: Stitching functions. (PDF 1.3)
  A stitching function (type 3) is a combination of other functions, partitioned across a domain (see Section 3.9.3, "Type 3 (Stitching) Functions").
- Type 4: Postscript calculations. (PDF 1.3)
  A PostScript calculator function (type 4) uses operators from the PostScript language to describe an arithmetic expression (see Section 3.9.4, "Type 4 (PostScript Calculator) Functions").
The function interface contains a single method, calculate which takes an array of m floats an interprets them into an array of n floats.
PDFFunctions do not have accessible constructors. Instead, use the static getFunction() method to read a functions from a PDF Object.

Examples of com.lowagie.text.pdf.PdfFunction

        LwgDocument document = new LwgDocument(LwgPageSize.A4, 50, 50, 50, 50);
        try {
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("shading.pdf"));
            document.open();


            PdfFunction function1 = PdfFunction.type2(writer, new float[]{0, 1}, null,
                new float[]{.929f, .357f, 1, .298f}, new float[]{.631f, .278f, 1, .027f}, 1.048f);
            PdfFunction function2 = PdfFunction.type2(writer, new float[]{0, 1}, null,
                new float[]{.929f, .357f, 1, .298f}, new float[]{.941f, .4f, 1, .102f}, 1.374f);
            PdfFunction function3 = PdfFunction.type3(writer, new float[]{0, 1}, null,
                new PdfFunction[]{function1, function2}, new float[]{.708f}, new float[]{1, 0, 0, 1});
            PdfShading shading = PdfShading.type3(writer, new CMYKColor(0, 0, 0, 0),
                new float[]{0, 0, .096f, 0, 0, 1}, null, function3, new boolean[]{true, true});
            PdfContentByte cb = writer.getDirectContent();
            cb.moveTo(316.789f, 140.311f);

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Examples of com.lowagie.text.pdf.PdfFunction

        Document document = new Document(PageSize.A4, 50, 50, 50, 50);
        try {
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("shading.pdf"));
            document.open();


            PdfFunction function1 = PdfFunction.type2(writer, new float[]{0, 1}, null,
                new float[]{.929f, .357f, 1, .298f}, new float[]{.631f, .278f, 1, .027f}, 1.048f);
            PdfFunction function2 = PdfFunction.type2(writer, new float[]{0, 1}, null,
                new float[]{.929f, .357f, 1, .298f}, new float[]{.941f, .4f, 1, .102f}, 1.374f);
            PdfFunction function3 = PdfFunction.type3(writer, new float[]{0, 1}, null,
                new PdfFunction[]{function1, function2}, new float[]{.708f}, new float[]{1, 0, 0, 1});
            PdfShading shading = PdfShading.type3(writer, new CMYKColor(0, 0, 0, 0),
                new float[]{0, 0, .096f, 0, 0, 1}, null, function3, new boolean[]{true, true});
            PdfContentByte cb = writer.getDirectContent();
            cb.moveTo(316.789f, 140.311f);

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Examples of com.sun.pdfview.function.PDFFunction

            ByteArrayInputStream bais = new ByteArrayInputStream(ary[1].getStream());
            ICC_Profile profile = ICC_Profile.getInstance(bais);
            value = new PDFColorSpace(new ICC_ColorSpace(profile));
        } else if (name.equals("Separation") || name.equals("DeviceN")) {
            PDFColorSpace alternate = getColorSpace(ary[2], resources);
            PDFFunction function = PDFFunction.getFunction(ary[3]);


            value = new AlternateColorSpace(alternate, function);
        } else if (name.equals("Indexed") || name.equals("I")) {
            /**
             * 4.5.5 [/Indexed baseColor hival lookup]

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Examples of com.sun.pdfview.function.PDFFunction

        }
        
        public Raster getRaster(int x, int y, int w, int h) {
            ColorSpace cs = getColorModel().getColorSpace();
            
            PDFFunction functions[] = getFunctions();
            int numComponents = cs.getNumComponents();


            float x0 = (float) start.getX();
            float x1 = (float) end.getX();
            float y0 = (float) start.getY();

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Examples of com.sun.pdfview.function.PDFFunction

        public Raster getRaster(int x, int y, int w, int h) {
          ColorSpace cs = getColorModel().getColorSpace();
            PDFColorSpace shadeCSpace = getColorSpace();




          PDFFunction functions[] = getFunctions();
          int numComponents = cs.getNumComponents();


          float x0 = (float) this.start.getX();
          float y0 = (float) this.start.getY();

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Examples of com.sun.pdfview.function.PDFFunction

        @Override
    public Raster getRaster(int x, int y, int w, int h) {
            ColorSpace cs = getColorModel().getColorSpace();
            PDFColorSpace shadeCSpace = getColorSpace();
            
            PDFFunction functions[] = getFunctions();
            
            int numComponents = cs.getNumComponents();


            float[] c1 = new float[2];

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Examples of com.sun.pdfview.function.PDFFunction

            ByteArrayInputStream bais = new ByteArrayInputStream(ary[1].getStream());
            ICC_Profile profile = ICC_Profile.getInstance(bais);
            value = new PDFColorSpace(new ICC_ColorSpace(profile));
        } else if (name.equals("Separation") || name.equals("DeviceN")) {
            PDFColorSpace alternate = getColorSpace(ary[2], resources);
            PDFFunction function = PDFFunction.getFunction(ary[3]);


            value = new AlternateColorSpace(alternate, function);
        } else if (name.equals("Indexed") || name.equals("I")) {
            /**
             * 4.5.5 [/Indexed baseColor hival lookup]

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