iTextSharp.text.pdf.PdfWriter.AddSimplePatternColorspace C# (CSharp) Méthode

        internal ColorDetails AddSimplePatternColorspace(BaseColor color)
        {
            int type = ExtendedColor.GetType(color);
            if (type == ExtendedColor.TYPE_PATTERN || type == ExtendedColor.TYPE_SHADING)
                throw new Exception(MessageLocalization.GetComposedMessage("an.uncolored.tile.pattern.can.not.have.another.pattern.or.shading.as.color"));
            switch (type) {
                case ExtendedColor.TYPE_RGB:
                    if (patternColorspaceRGB == null) {
                        patternColorspaceRGB = new ColorDetails(GetColorspaceName(), body.PdfIndirectReference, null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.Add(PdfName.DEVICERGB);
                        AddToBody(array, patternColorspaceRGB.IndirectReference);
                    }
                    return patternColorspaceRGB;
                case ExtendedColor.TYPE_CMYK:
                    if (patternColorspaceCMYK == null) {
                        patternColorspaceCMYK = new ColorDetails(GetColorspaceName(), body.PdfIndirectReference, null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.Add(PdfName.DEVICECMYK);
                        AddToBody(array, patternColorspaceCMYK.IndirectReference);
                    }
                    return patternColorspaceCMYK;
                case ExtendedColor.TYPE_GRAY:
                    if (patternColorspaceGRAY == null) {
                        patternColorspaceGRAY = new ColorDetails(GetColorspaceName(), body.PdfIndirectReference, null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.Add(PdfName.DEVICEGRAY);
                        AddToBody(array, patternColorspaceGRAY.IndirectReference);
                    }
                    return patternColorspaceGRAY;
                case ExtendedColor.TYPE_SEPARATION: {
                    ColorDetails details = AddSimple(((SpotColor)color).PdfSpotColor);
                    ColorDetails patternDetails;
                    documentSpotPatterns.TryGetValue(details, out patternDetails);
                    if (patternDetails == null) {
                        patternDetails = new ColorDetails(GetColorspaceName(), body.PdfIndirectReference, null);
                        PdfArray array = new PdfArray(PdfName.PATTERN);
                        array.Add(details.IndirectReference);
                        AddToBody(array, patternDetails.IndirectReference);
                        documentSpotPatterns[details] = patternDetails;
                    }
                    return patternDetails;
                }
                default:
                    throw new Exception(MessageLocalization.GetComposedMessage("invalid.color.type"));
            }
        }