PDFlib 8 Windows COM/.NET Tutorial

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{ } /* no supported features found */ Use the following statement to check whether PDFlib and the test font support a particular feature, e.g. ligatures (liga): result = (int) p.info_font(font, "feature", "name=liga"); if (result == 1) { /* feature supported by font and PDFlib */ } 162 Chapter 6: Text Output (Edition for COM, .NET, and REALbasic)
6.4 Complex Script Output Cookbook A full code sample can be found in the Cookbook topic complex_scripts/starter_shaping. 6.4.1 Complex Scripts The Latin script basically places one character after the other in left-to-right order. Other writing systems have additional requirements for correct text output. We refer to such writing systems as complex scripts. PDFlib performs text processing for complex scripts for a variety of scripts including those listed in Table 6.2. In this section we will discuss shaping for complex scripts in more detail. While most Western languages can be written by simply placing one character after the other from left to right, some writing systems (scripts) require additional processing: > The Arabic and Hebrew scripts place text from right to left. Mixed text (e.g. Arabic with a Latin insert) contains both right-to-left and left-to-right segments. These segments must be reordered, which is referred to as the Bidi (bidirectional) problem. > Some scripts, especially Arabic, use different character shapes depending on the position of the character (isolated, beginning/middle/end of a word). > Mandatory ligatures replace sequences of characters. > The position of glyphs must be adjusted horizontally and vertically. > Indic scripts require reordering of some characters, i.e. characters may change their position in the text. > Special word break and justification rules apply to some scripts. Scripts which require one or more of these processing steps are called complex scripts. The process of preparing incoming logical text for proper presentation is called shaping (this term also includes reordering and Bidi processing). The user always supplies text in unshaped form and in logical order, while PDFlib performs the necessary shaping before producing PDF output. Complex script shaping can be enabled with the shaping text option, which in turn requires the script option and optionally allows the language option. The following option list enables Arabic shaping (and Bidi processing): shaping script=arab Caveats. Note the following when working with complex script shaping: > PDFlib does not automatically set the shaping and script options, but expects them to be supplied by the user. > Script-specific shaping (options shaping, script, language) will only be applied to glyphs within the same font, but not across glyphs from different fonts. If fallback fonts are used, shaping will only be applied within text runs which contain text in the same (master or fallback) font. > Since shaping may reorder characters in the text, care must be taken regarding attribute changes within a word. For example, if you use inline options in Textflow to colorize the second character in a word – what should happen when shaping swaps the first and second characters? For this reason, formatting changes should only be applied at word boundaries, but not within words. 6.4 Complex Script Output 163
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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
Page 91 and 92: p.set_parameter("SearchPath", "/pat
Page 93 and 94: 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: will prevent them from being replac
Page 145 and 146: Requirements for shaping. A font fo
Page 147 and 148: 6.4.3 Complex Script Shaping The sh
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
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leftindent = &indent parindent = -
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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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PDFlib 8 Windows COM/.NET Tutorial

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