PDFlib 8 Windows COM/.NET Tutorial

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The font will be registered in PDFlib, and its name can be supplied to load_font( ) along with an encoding which contains the names of the glyphs in the Type 3 font. Please note the following when working with Type 3 fonts: > Similar to patterns and templates, images cannot be opened within a glyph description. However, they can be opened before starting a glyph description, and placed within the glyph description. Alternatively, inline images may be used for small bitmaps to overcome this restriction. > Due to restrictions in PDF consumers all characters used in text output must actually be defined in the font: if character code x is to be displayed with any text output function, and the encoding contains glyphname at position x, then glyphname must have been defined via begin_glyph( ). > Some PDF consumers require a glyph named .notdef if codes will be used for which the corresponding glyph names are not defined in the font. Acrobat 8 may even crash if a .notdef glyph is not present. The .notdef glyph must be present, but it may simply contain an empty glyph description. > When normal bitmap data is used to define characters, unused pixels in the bitmap will print as white, regardless of the background. In order to avoid this and have the original background color shine through, use the mask parameter for constructing the bitmap image. > The interpolate option for images may be useful for enhancing the screen and print appearance of Type 3 bitmap fonts. > Type 3 fonts do not contain any typographic properties such as ascender, descender, etc. However, these can be set by using the corresponding options in load_font( ). 120 Chapter 5: Font Handling (Edition for COM, .NET, and REALbasic)
5.2 Unicode Characters and Glyphs 5.2.1 Glyph IDs A font is a collection of glyphs, where each glyph is defined by its geometric outline. PDFlib assigns a number to each glyph in the font. This number is called the glyph id or GID. GID 0 (zero) refers to the .notdef glyph in all font formats. The visual appearance of the .notdef glyph varies among font formats and vendors; typical implementations are the space glyph or a hollow or crossed-out rectangle. The highest GID is one less than the number of glyphs in the font which can be queried with the numglyphs keyword of info_font( ). The assignment of glyph IDs depends on the font format: > Since TrueType and OpenType fonts already contain internal GIDs, PDFlib uses these GIDs. > For CID-keyed OpenType CJK fonts CIDs will be used as GIDs. > For other font types PDFlib numbers the glyphs according to the order of the corresponding outline descriptions in the font. PDFlib supports glyph selection via GID as an alternative to Unicode and other encodings (see »Glyphid encoding«, page 129). Direct GID addressing is only useful for specialized applications, e.g. printing font overview tables by querying the number of glyphs and iterating over all glyph IDs. 5.2.2 Unicode Mappings for Glyphs Unicode mappings. PDFlib assigns a unique Unicode value to each GID. This mapping process depends on the font format and is detailed in the sections below for the supported font types. Although a unique Unicode value will be assigned to each GID, the reverse is not necessarily true, i.e. a particular glyph can represent multiple Unicode values. Common examples in many TrueType and OpenType fonts are the empty glyph which represents U+0020 Space as well as U+00A0 No-Break Space, and a glyph which represents both U+2126 Ohm Sign and U+03A9 Greek Capital Letter Omega. If multiple Unicode values point to the same glyph in a font PDFlib will assign the first Unicode value found in the font. Unmapped glyphs and the Private Use Area (PUA). In some situations the font may not provide a Unicode value for a particular glyph. In this case PDFlib assigns a value from the Unicode Private Use Area (PUA, see Section 4.1, »Important Unicode Concepts«, page 99) to the glyph. Such glyphs are called unmapped glyphs. The number of unmapped glyphs in a font can be queried with the unmappedglyphs keyword of info_ font( ). Unmapped glyphs will be represented by the Unicode replacement character U+FFFD in the font’s ToUnicode CMap which controls searchability and text extraction. As a consequence, unmapped glyphs cannot be properly extracted as text from the generated PDF. When PDFlib assigns PUA values to unmapped glyphs it uses ascending values from the following pool: > The basis is the Unicode PUA range in the Basic Multilingual Plane (BMP), i.e. the range U+E000 - U+F8FF. Additional PUA values in plane 15 (U+F0000 to U+FFFFD) are used if required. 5.2 Unicode Characters and Glyphs 121
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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
Page 51 and 52: Table 3.1 Resource categories suppo
Page 53 and 54: myencoding=myencoding.enc . ICCProf
Page 55 and 56: 2 GB file size limit: The PDF/A-1 s
Page 57 and 58: Visualizing coordinates. In order t
Page 59 and 60: Table 3.2 Minimum and maximum page
Page 61 and 62: Instead of creating a path object w
Page 63 and 64: Proxy for the target page. PDFlib c
Page 65 and 66: 3.3.2 Protecting Documents with PDF
Page 67 and 68: 3.4 Web-Optimized (Linearized) PDF
Page 69 and 70: Cookbook A full code sample can be
Page 71 and 72: HKS® colors. The HKS color system
Page 73 and 74: Use the file name determined in the
Page 75 and 76: 3.6 Interactive Elements Cookbook C
Page 81 and 82: 3.7 Georeferenced PDF Cookbook A fu
Page 83 and 84: Examples for projected coordinate s
Page 85 and 86: 4 Unicode and Legacy Encodings This
Page 87 and 88: 4.2 Single-Byte (8-Bit) Encodings 8
Page 89 and 90: 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: SING fonts usually contain only a s
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 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 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
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The keepnative option is false by d
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The vert feature (vertical writing)
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7 Importing Images and PDF Pages PD
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String optlist13 = "OPI-1.3 { ALDIm
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GIF images. PDFlib supports all GIF
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channels which are identified by na
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In order to colorize an image with
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You can not re-use individual eleme
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Encrypted PDF documents without the
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Positioning an image in the box. We
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Fig. 7.4 The rotate option Fig. 7.5
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Fig. 7.8 Adjusting the page size. L
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8 Text and Table Formatting 8.1 Pla
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Generated output Option list for fi
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To illustrate the size of the match
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Long Distance Glider with sensation
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8.2 Multi-Line Textflows In additio
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normal text. Font, font size, and e
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leftindent = 15 parindent = 20 lead
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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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