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scaling factor or rotation. For each type of block the PDFlib API offers a dedicated functionfor processing the block. These functions search an imported PDF page for a blockby its name, analyze its properties, and place some client-supplied data (text, raster image,or PDF page) on the new page according to the corresponding block properties.Cookbook A full code sample for querying the properties of blocks contained in an imported PDF can befound in the Cookbook topic blocks/query_block_properties.Custom block properties. Standard block properties make it possible to quickly implementvariable data processing applications, but these are limited to the set of propertieswhich are internally known to PDFlib and can automatically be processed. In order toprovide more flexibility, the designer may also assign custom properties to a block.These can be used to extend the block concept in order to match the requirements ofthe most demanding variable data processing applications.There are no rules for custom properties since PDFlib will not process custom propertiesin any way, except making them available to the client. The client code can examinethe custom properties and act in whatever way it deems appropriate. Based on somecustom property of a block the code may make layout-related or data-gathering decisions.For example, a custom property for a scientific application could specify thenumber of digits for numerical output, or a database field name may be defined as acustom block property for retrieving the data corresponding to this block.10.2.3 Why not use PDF Form Fields?Experienced Acrobat users may ask why we implemented a new block concept forPDFlib, instead of relying on the established form field scheme available in PDF. The primarydistinction is that PDF form fields are optimized for interactive filling, whilePDFlib blocks are targeted at automated filling. Applications which need both interactiveand automated filling can easily achieve this by using a feature which automaticallyconverts form fields to blocks (see Section 10.3.4, »Converting PDF Form Fields toPDFlib Blocks«, page 234).Although there are many parallels between both concepts, PDFlib blocks offer severaladvantages over PDF form fields as detailed in Table 10.1.Table 10.1 Comparison of PDF form fields and PDFlib blocksfeature PDF form fields PDFlib blocksdesign objective for interactive use for automated fillingtypographic features (beyondchoice of font and font size)– kerning, word and character spacing, underline/overline/strikeoutfont control font embedding font embedding and subsetting, encodingtext formatting controls left-, center-, right-aligned left-, center-, right-aligned, justified; various formattingalgorithms and controls; inline optionscan be used to control the appearance of textchange font or other text attributeswithin textmerged result is integral part of PDFpage description– yes– yesusers can edit merged field contents yes no228 Chapter 10: Variable Data and Blocks
Table 10.1 Comparison of PDF form fields and PDFlib blocksfeature PDF form fields PDFlib blocksextensible set of properties – yes (custom block properties)use image files for filling – BMP, CCITT, GIF, PNG, JPEG, JPEG 2000, TIFFcolor support RGB grayscale, RGB, CMYK, Lab, spot color (HKS andPantone spot colors integrated in the Block plugin)PDF/X- and PDF/A-conforming PDF/X: no; PDF/A: restricted yes (both template with blocks and merged results)graphics and text properties can beoverridden upon filling– yesText blocks can be linked – yes10.2 Overview of the PDFlib Block Concept 229
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PDFlib GmbH München, Germanywww.pd
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Contents0 Applying the PDFlib Licen
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5.6.1 Standard CJK Fonts 1165.6.2 C
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10.2.2 Block Properties 22710.2.3 W
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0 Applying the PDFlib License KeyAl
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Licensing options. Different licens
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PDFlib TET (Text Extraction Toolkit
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PDFlib can be integrated directly i
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Improved handling of Chinese, Japan
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1.4 Features in PDFlib/PDFlib+PDI/P
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1.5 Availability of Features in dif
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24 Chapter 1: Introduction
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2.2 COM Binding(This section is onl
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necessary. After fatal exceptions t
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2.4 C++ BindingIn addition to the p
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PDFlib servlets and Java applicatio
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2.6 .NET Binding(This section is on
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More than one way of String handlin
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PHP on Windows will find files with
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2.10 REALbasic Binding 1(This secti
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Now you can compile your program us
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2.13 Tcl BindingInstalling the PDFl
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Error policies. When PDFlib detects
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plied), but only the corresponding
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name exactly as supplied and try to
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3.1.4 Generating PDF Documents in M
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3.2 Page Descriptions3.2.1 Coordina
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In order to facilitate the use of t
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Merely constructing a path doesn’
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3.3 Working with ColorNote The PDFl
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where is the identifier of the col
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Rendering Intents. Although PDFlib
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p.set_parameter("errorpolicy", "ret
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with a thin black border. Initially
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}p.begin_page_ext(pagewidth, pagehe
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Table 3.5 Parameters for the JavaSc
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4.2 Important Unicode ConceptsChara
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4.3 Strings in PDFlib4.3.1 String T
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EBCDIC UTF-8 BOM). If the usehypert
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values 0x7B and 0x7D must be preced
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Table 4.4 Availability of glyphs fo
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exclam 33 0x0021...If no Unicode va
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Table 4.5 Predefined CMaps for Japa
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4.6 Addressing Characters and Glyph
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Table 4.8 Control characters and th
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glyphcheck=replace: silent approach
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94 Chapter 4: Unicode and Legacy En
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5.1.2 Font EncodingsAll fonts for t
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5.2 Font Format Details5.2.1 PostSc
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the contents of the characters in a
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Path resource category (again, the
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When working with host fonts it is
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Note The Leopard builds of PDFlib (
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put by default. For encodings which
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5.4.2 Glyph ID Addressing for TrueT
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5.5 Font Metrics and Text Variation
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Temporarily disabling kerning may b
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5.6 Chinese, Japanese, and Korean F
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CJK host font names on Windows can
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120 Chapter 5: Font Handling
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tion) if the user coordinate system
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color: black and white, grayscale,
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PDFlib supports three kinds of tran
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BMP> PNG> JPEG> TIFF> GIFFor images
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6.2 Importing PDF Pages with PDI (P
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Alternatively, you can use the pdiu
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20Kraxitext on top right of the box
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can be used. In Figure 7.5h the tex
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7.1.5 Placing a StampCookbook A ful
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7.2 Multi-Line TextflowsIn addition
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piece of normal text. Font, font si
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leftindent = 15parindent = 20leadin
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hortabmethod rulertabalignment left
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leftindent = &indentparindent = - &
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To fold the famous rocket looper pr
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Our paper planes are the ideal way
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Our paper planesare the ideal way o
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p.fit_textflow(textflow, left_x, le
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7.3 Placing Images and Imported PDF
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Fig. 7.28 Fitting an image into a b
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Fitting an oriented image into a bo
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7.4 Table FormattingThe table forma
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tbl = p.add_table_cell(tbl, 1, 1, "
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cell border as the Material text. T
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those width values will implicitly
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column defining a column width of 1
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The table in Figure 7.42 is spread
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Splitting a row. If the last body d
Page 178 and 179: To increase the box height to match
Page 180 and 181: Fig. 7.48 Using the image matchbox
Page 182 and 183: size of a page. Determining the pag
Page 184 and 185: 8.3 Composite Data Structures and I
Page 186 and 187: Table 8.2 pCOS path prefixesprefixl
Page 188 and 189: Table 8.3 Universal pseudo objectso
Page 190 and 191: Table 8.4 Pseudo objects for PDF ob
Page 192 and 193: Table 8.5 Pseudo objects for resour
Page 194 and 195: 194 Chapter 8: The pCOS Interface
Page 196 and 197: Table 9.2 PDFlib features for PDF 1
Page 198 and 199: to disable any access restrictions.
Page 200 and 201: Table 9.4 Access restriction keywor
Page 202 and 203: 9.4 PDF/X for Print Production9.4.1
Page 204 and 205: Table 9.6 Operations which must be
Page 206 and 207: work as a full PDF/X validator or t
Page 208 and 209: 9.5.2 Generating PDF/A-conforming O
Page 210 and 211: Table 9.11 Additional requirements
Page 212 and 213: This statement will retrieve a stri
Page 214 and 215: Table 9.16 Predefined XMP schemas f
Page 216 and 217: 9.6 Tagged PDFTagged PDF is a certa
Page 218 and 219: quired, but will enhance the qualit
Page 220 and 221: * 1 create top part of left column
Page 222 and 223: optlist = "Title=Insert parent=" +
Page 224 and 225: exported to other formats. If the A
Page 226 and 227: Click Add... and select the PDFlib
Page 230 and 231: 10.3 Using the PDFlib Block Plugin
Page 232 and 233: next step other objects which are p
Page 234 and 235: Use Ctrl-V (on Windows) or Cmd-V (o
Page 236 and 237: Associating form fields with corres
Page 238 and 239: Property overrides can be achieved
Page 240 and 241: 10.5 Standard Properties for Automa
Page 242 and 243: 10.5.2 Text PropertiesText-related
Page 244 and 245: Table 10.6 Textflow block propertie
Page 246 and 247: Table 10.6 Textflow block propertie
Page 248 and 249: 10.6 Querying Block Names and Prope
Page 250 and 251: 10.7 PDFlib Block SpecificationThe
Page 252 and 253: Example. The following fragment sho
Page 254 and 255: 254 Chapter 10: Variable Data and B
Page 256 and 257: 256
Page 258 and 259: Ffeatures of PDFlib 20fill 57font m
Page 260: TrimBox 57TrueType fonts 95TTC (Tru
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