internal static Type1Font CreateFontProgram(PdfDictionary fontDictionary, FontEncoding fontEncoding, CMapToUnicode toUnicode) { PdfName baseFontName = fontDictionary.GetAsName(PdfName.BaseFont); String baseFont; if (baseFontName != null) { baseFont = baseFontName.GetValue(); } else { baseFont = FontUtil.CreateRandomFontName(); } if (!fontDictionary.ContainsKey(PdfName.FontDescriptor)) { Type1Font type1StdFont; try { //if there are no font modifiers, cached font could be used, //otherwise a new instance should be created. type1StdFont = (Type1Font)FontProgramFactory.CreateFont(baseFont, true); } catch (Exception) { type1StdFont = null; } if (type1StdFont != null) { return(type1StdFont); } } iText.Kernel.Font.DocType1Font fontProgram = new iText.Kernel.Font.DocType1Font(baseFont); PdfDictionary fontDesc = fontDictionary.GetAsDictionary(PdfName.FontDescriptor); fontProgram.subtype = fontDesc.GetAsName(PdfName.Subtype); FillFontDescriptor(fontProgram, fontDesc); PdfNumber firstCharNumber = fontDictionary.GetAsNumber(PdfName.FirstChar); int firstChar = firstCharNumber != null?Math.Max(firstCharNumber.IntValue(), 0) : 0; int[] widths = FontUtil.ConvertSimpleWidthsArray(fontDictionary.GetAsArray(PdfName.Widths), firstChar, fontProgram .GetMissingWidth()); fontProgram.avgWidth = 0; int glyphsWithWidths = 0; for (int i = 0; i < 256; i++) { Glyph glyph = new Glyph(i, widths[i], fontEncoding.GetUnicode(i)); fontProgram.codeToGlyph[i] = glyph; if (glyph.HasValidUnicode()) { //FontEncoding.codeToUnicode table has higher priority if (fontEncoding.ConvertToByte(glyph.GetUnicode()) == i) { fontProgram.unicodeToGlyph[glyph.GetUnicode()] = glyph; } } else { if (toUnicode != null) { glyph.SetChars(toUnicode.Lookup(i)); } } if (widths[i] > 0) { glyphsWithWidths++; fontProgram.avgWidth += widths[i]; } } if (glyphsWithWidths != 0) { fontProgram.avgWidth /= glyphsWithWidths; } return(fontProgram); }
internal static void FillFontDescriptor(iText.Kernel.Font.DocType1Font font, PdfDictionary fontDesc) { if (fontDesc == null) { return; } PdfNumber v = fontDesc.GetAsNumber(PdfName.Ascent); if (v != null) { font.SetTypoAscender(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.Descent); if (v != null) { font.SetTypoDescender(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.CapHeight); if (v != null) { font.SetCapHeight(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.XHeight); if (v != null) { font.SetXHeight(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.ItalicAngle); if (v != null) { font.SetItalicAngle(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.StemV); if (v != null) { font.SetStemV(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.StemH); if (v != null) { font.SetStemH(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.FontWeight); if (v != null) { font.SetFontWeight(v.IntValue()); } v = fontDesc.GetAsNumber(PdfName.MissingWidth); if (v != null) { font.missingWidth = v.IntValue(); } PdfName fontStretch = fontDesc.GetAsName(PdfName.FontStretch); if (fontStretch != null) { font.SetFontWidth(fontStretch.GetValue()); } PdfArray bboxValue = fontDesc.GetAsArray(PdfName.FontBBox); if (bboxValue != null) { int[] bbox = new int[4]; //llx bbox[0] = bboxValue.GetAsNumber(0).IntValue(); //lly bbox[1] = bboxValue.GetAsNumber(1).IntValue(); //urx bbox[2] = bboxValue.GetAsNumber(2).IntValue(); //ury bbox[3] = bboxValue.GetAsNumber(3).IntValue(); if (bbox[0] > bbox[2]) { int t = bbox[0]; bbox[0] = bbox[2]; bbox[2] = t; } if (bbox[1] > bbox[3]) { int t = bbox[1]; bbox[1] = bbox[3]; bbox[3] = t; } font.SetBbox(bbox); // If ascender or descender in font descriptor are zero, we still want to get more or less correct valuee for // text extraction, stamping etc. Thus we rely on font bbox in this case if (font.GetFontMetrics().GetTypoAscender() == 0 && font.GetFontMetrics().GetTypoDescender() == 0) { float maxAscent = Math.Max(bbox[3], font.GetFontMetrics().GetTypoAscender()); float minDescent = Math.Min(bbox[1], font.GetFontMetrics().GetTypoDescender()); font.SetTypoAscender((int)(maxAscent * 1000 / (maxAscent - minDescent))); font.SetTypoDescender((int)(minDescent * 1000 / (maxAscent - minDescent))); } } PdfString fontFamily = fontDesc.GetAsString(PdfName.FontFamily); if (fontFamily != null) { font.SetFontFamily(fontFamily.GetValue()); } PdfNumber flagsValue = fontDesc.GetAsNumber(PdfName.Flags); if (flagsValue != null) { int flags = flagsValue.IntValue(); if ((flags & 1) != 0) { font.SetFixedPitch(true); } if ((flags & 262144) != 0) { font.SetBold(true); } } PdfName[] fontFileNames = new PdfName[] { PdfName.FontFile, PdfName.FontFile2, PdfName.FontFile3 }; foreach (PdfName fontFile in fontFileNames) { if (fontDesc.ContainsKey(fontFile)) { font.fontFileName = fontFile; font.fontFile = fontDesc.GetAsStream(fontFile); break; } } }