PDFlib 8 Windows COM/.NET Tutorial

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page 162). While a few features may differ in behavior subject to the script and language options but can also be used without these options (e.g. liga), the locl feature only makes sense in combination with the script and language options. Note While advanced line breaking for Textflow (see Section 8.2.9, »Advanced script-specific Line Breaking«, page 222) also applies language-specific processing, it is not controlled by the language option, but by the locale option which identifies not only languages, but also countries and regions. Table 6.3 Keywords for the language option language language keyword keyword keyword language _none unspecified language FIN Finnish NEP Nepali AFK Afrikaans FRA French ORI Oriya SQI Albanian GAE Gaelic PAS Pashto ARA Arabic DEU German PLK Polish HYE Armenian ELL Greek PTG Portuguese ASM Assamese GUJ Gujarati ROM Romanian EUQ Basque HAU Hausa RUS Russian BEL Belarussian IWR Hebrew SAN Sanskrit BEN Bengali HIN Hindi SRB Serbian BGR Bulgarian HUN Hungarian SND Sindhi CAT Catalan IND Indonesian SNH Sinhalese CHE Chechen ITA Italian SKY Slovak ZHP Chinese phonetic JAN Japanese SLV Slovenian ZHS Chinese simplified KAN Kannada ESP Spanish ZHT Chinese traditional KSH Kashmiri SVE Swedish COP Coptic KHM Khmer SYR Syriac HRV Croatian KOK Konkani TAM Tamil CSY Czech KOR Korean TEL Telugu DAN Danish MLR Malayalam reformed THA Thai NLD Dutch MAL Malayalam traditional TIB Tibetan DZN Dzongkha MTS Maltese TRK Turkish 1 ENG English MNI Manipuri URD Urdu ETI Estonian MAR Marathi WEL Welsh FAR Farsi MNG Mongolian JII Yiddish 1. Some fonts wrongly use TUR for Turkish; PDFlib treats this tag as equivalent to TRK. 166 Chapter 6: Text Output (Edition for COM, .NET, and REALbasic)
6.4.3 Complex Script Shaping The shaping process selects appropriate glyph forms depending on whether a character is located at the start, middle, or end of a word, or in a standalone position. Shaping is a crucial component of Arabic and Hindi text formatting. Shaping may also replace a sequence of two or more characters with a suitable ligature. Since the shaping process determines the appropriate character forms automatically, explicit ligatures and Unicode presentation forms (e.g. Arabic Presentation Forms-A U+FB50) must not be used as input characters. Since complex scripts require multiple different glyph forms per character and additional rules for selecting and placing these glyphs, shaping for complex scripts does not work with all kinds of fonts, but requires suitable fonts which contain the necessary information. Shaping works for TrueType and OpenType fonts which contain the required feature tables (see »Requirements for shaping«, page 166, for detailed requirements). Shaping can only be done for characters in the same font because the shaping information is specific to a particular font. As it doesn’t make sense, for example, to form ligatures across different fonts, complex script shaping cannot be applied to a word which contains characters from different fonts. Override shaping behavior. In some cases users may want to override the default shaping behavior. PDFlib supports several Unicode formatting characters for this purpose. For convenience, these formatting characters can also be specified with entity names (see Table 6.4). Table 6.4 Unicode control characters for overriding the default shaping behavior formatting character entity name Unicode name function U+200C ZWNJ ZERO WIDTH NON-JOINER prevent the two adjacent characters from forming a cursive connection U+200D ZWJ ZERO WIDTH JOINER force the two adjacent characters to form a cursive connection 6.4.4 Bidirectional Formatting Cookbook A full code sample can be found in the Cookbook topic complex_scripts/bidi_formatting. For right-to-left text (especially Arabic and Hebrew, but also some other scripts) it is very common to have nested sequences of left-to-right Latin text, e.g. an address or a quote in another language. These mixed sequences of text require bidirectional (Bidi) formatting. Since numerals are always written from left to right, the Bidi problem affects even text which is completely written in Arabic or Hebrew. PDFlib implements bidirectional text reordering according to the Unicode Bidi algorithm as specified in Unicode Standard Annex #9 1 . Bidi processing does not have to be enabled with an option, but will automatically be applied as part of the shaping process if text in a right-to-left script with an appropriate script option is encountered. 1. See www.unicode.org/unicode/reports/tr9/ 6.4 Complex Script Output 167
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ABC PDFlib, PDFlib+PDI, PPS A libra
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Contents 0 Applying the PDFlib Lice
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5.2 Unicode Characters and Glyphs 1
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8.4 Matchboxes 243 8.4.1 Decorating
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0 Applying the PDFlib License Key R
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Licensing options. Different licens
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1 Introduction 1.1 Roadmap to Docum
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1.2 PDFlib Programming What is PDFl
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1.3 What’s new in PDFlib/PDFlib+P
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1.3.3 PDFlib Block Plugin and PDFli
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1.4 Features in PDFlib Table 1.1 li
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Table 1.1 Feature list for PDFlib t
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1.6 Additional Features in PPS Tabl
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2 PDFlib Language Bindings Note It
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2.3 COM Binding COM (Component Obje
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Supply your license key at runtime
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eference calls for an int type argu
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2.5 C++ Binding (This section is on
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2.7 .NET Binding Note Detailed info
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2.8 Objective-C Binding (This secti
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2.10 PHP Binding (This section is o
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2.12 REALbasic Binding Installing t
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2.14 Ruby Binding (This section is
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3 Creating PDF Documents 3.1 Genera
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Enable warning logging in the devel
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Table 3.1 Resource categories suppo
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myencoding=myencoding.enc . ICCProf
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2 GB file size limit: The PDF/A-1 s
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Visualizing coordinates. In order t
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Table 3.2 Minimum and maximum page
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Instead of creating a path object w
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Proxy for the target page. PDFlib c
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3.3.2 Protecting Documents with PDF
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3.4 Web-Optimized (Linearized) PDF
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Cookbook A full code sample can be
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HKS® colors. The HKS color system
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Use the file name determined in the
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3.6 Interactive Elements Cookbook C
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3.7 Georeferenced PDF Cookbook A fu
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Examples for projected coordinate s
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4 Unicode and Legacy Encodings This
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4.2 Single-Byte (8-Bit) Encodings 8
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exclam 33 0x0021 ... If no Unicode
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p.set_parameter("SearchPath", "/pat
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Objective-C > Python > REALbasic >
Page 95 and 96: If an escape sequence cannot be res
Page 97 and 98: Character references are not substi
Page 99 and 100: 5 Font Handling 5.1 Font Formats 5.
Page 101 and 102: SING fonts usually contain only a s
Page 103 and 104: 5.2 Unicode Characters and Glyphs 5
Page 105 and 106: complex script shaping and OpenType
Page 107 and 108: 5.3.2 Converting Unicode Values to
Page 109 and 110: 5.4 Loading Fonts 5.4.1 Selecting a
Page 111 and 112: Glyphid encoding. PDFlib supports e
Page 113 and 114: If you know the character code you
Page 115 and 116: TrueType and OpenType fonts. The fo
Page 117 and 118: .tte .ttf .otf .gai .afm .pfm .ttc
Page 119 and 120: The keywords are case-insensitive.
Page 121 and 122: Caveats. Note the following when wo
Page 123 and 124: Add Gaiji characters to a font. Thi
Page 125 and 126: Legal aspects of font embedding. It
Page 127 and 128: 5.6 Querying Font Information info_
Page 129 and 130: Query the font-specific name of a g
Page 131 and 132: 6 Text Output 6.1 Text Output Metho
Page 133 and 134: descender = p.info_font(font, "desc
Page 135 and 136: Cookbook A full code sample can be
Page 137 and 138: 6.3 OpenType Layout Features Cookbo
Page 139 and 140: Table 6.1 Supported OpenType featur
Page 141 and 142: will prevent them from being replac
Page 143 and 144: 6.4 Complex Script Output Cookbook
Page 145: Requirements for shaping. A font fo
Page 149 and 150: You can use the writingdirx keyword
Page 151 and 152: 6.5 Chinese, Japanese, and Korean T
Page 153 and 154: The keepnative option is false by d
Page 155 and 156: The vert feature (vertical writing)
Page 157 and 158: 7 Importing Images and PDF Pages PD
Page 159 and 160: String optlist13 = "OPI-1.3 { ALDIm
Page 161 and 162: GIF images. PDFlib supports all GIF
Page 163 and 164: channels which are identified by na
Page 165 and 166: In order to colorize an image with
Page 167 and 168: You can not re-use individual eleme
Page 169 and 170: Encrypted PDF documents without the
Page 171 and 172: Positioning an image in the box. We
Page 173 and 174: Fig. 7.4 The rotate option Fig. 7.5
Page 175 and 176: Fig. 7.8 Adjusting the page size. L
Page 177 and 178: 8 Text and Table Formatting 8.1 Pla
Page 179 and 180: Generated output Option list for fi
Page 181 and 182: To illustrate the size of the match
Page 183 and 184: Long Distance Glider with sensation
Page 185 and 186: 8.2 Multi-Line Textflows In additio
Page 187 and 188: normal text. Font, font size, and e
Page 189 and 190: leftindent = 15 parindent = 20 lead
Page 191 and 192: Explicitly setting options. Note th
Page 193 and 194: leftindent = &indent parindent = -
Page 195 and 196: To fold the famous rocket looper pr
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8.2.8 Controlling the standard Line
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Our paper planes are the ideal way
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French text. As a result, the guill
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String imageoptlist = "scale=2"; p.
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8.3 Table Formatting The table form
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tbl = p.add_table_cell(tbl, 1, 1, "
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In addition, we want the baseline o
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8.3.3 Table and Column Widths When
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if (tbl == -1) throw new Exception(
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esult = p.fit_table(tbl, llx, lly,
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Figure 8.38 shows how the Textflow
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Continue the table in the next fitb
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To increase the box height to match
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Fig. 8.43 Using the image matchbox
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9 The pCOS Interface The pCOS (PDFl
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10 PDF Versions and Standards 10.1
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Table 10.1 PDFlib features which re
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10.3 PDF/X for Print Production 10.
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Table 10.2 Operations which must be
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10.3.3 Output Intent and Standard O
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Table 10.5 Compatible PDF/X input l
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10.4.2 Generating PDF/A-conforming
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Additional requirements and restric
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While PDFlib can correct certain it
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Table 10.13 Predefined XMP schemas
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tree is created in multiple travers
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All parts of a Textflow (all calls
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* 1 create header */ p.set_text_pos
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Acrobat’s Accessibility Checker.
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11 PPS and the PDFlib Block Plugin
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11.2 Overview of the Block Concept
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Table 11.1 Comparison of PDF form f
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Fig. 11.1 Visualization of Blocks I
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Fig. 11.3 Grid preferences in Acrob
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Note Do not confuse the default val
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PDFlib Blocks choose PDFlib Blocks,
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If you do not want to keep the conv
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Fig. 11.4 Preview PDF for the conta
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PDF/X-3:2002, PDF/X-3:2003 PDF/X-4,
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Placing the imported page on top of
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The third method, i.e. filling a PD
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11.6.2 Rectangle Properties Rectang
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Table 11.7 Text appearance properti
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11.6.5 Text Formatting Properties T
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Table 11.9 Text formatting properti
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Table 11.11 Fitting properties for
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11.6.7 Properties for default Conte
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Querying custom properties. Custom
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Data types for Block properties. Pr
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endobj /Name /job_title /Subtype /T
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A Revision History Date Changes Jun
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Index A Acrobat plugin for creating
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N name strings 108 in non-Unicode c
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ABC PDFlib GmbH Franziska-Bilek-Weg
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