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Merely constructing a path doesn’t result in anything showing up on the page; youmust either fill or stroke the path in order to get visible results:p.moveto(100, 100);p.lineto(200, 100);p.stroke();Most graphics functions make use of the concept of a current point, which can bethought of as the location of the pen used for drawing.Cookbook A full code sample can be found in the Cookbook topic graphics/starter_graphics.3.2.4 TemplatesTemplates in PDF. PDFlib supports a PDF feature with the technical name formXObjects. However, since this term conflicts with interactive forms we refer to this featureas templates. A PDFlib template can be thought of as an off-page buffer into whichtext, vector, and image operations are redirected (instead of acting on a regular page).After the template is finished it can be used much like a raster image, and placed an arbitrarynumber of times on arbitrary pages. Like images, templates can be subjected togeometrical transformations such as scaling or skewing. When a template is used onmultiple pages (or multiply on the same page), the actual PDF operators for constructingthe template are only included once in the PDF file, thereby saving PDF output filesize. Templates suggest themselves for elements which appear repeatedly on severalpages, such as a constant background, a company logo, or graphical elements emittedby CAD and geographical mapping software. Other typical examples for template usageinclude crop and registration marks or custom Asian glyphs.Using templates with PDFlib. Templates can only be defined outside of a page description,and can be used within a page description. However, templates may also containother templates. Obviously, using a template within its own definition is not possible.Referring to an already defined template on a page is achieved with the PDF_fit_image( )function just like images are placed on the page (see Section 7.3, »Placing Images andImported PDF Pages«, page 158). The general template idiom in PDFlib looks as follows:/* define the template */template = p.begin_template_ext(template_width, template_height, "");...place marks on the template using text, vector, and image functions...p.end_template();...p.begin_page(page_width, page_height);/* use the template */p.fit_image(template, 0.0, 0.0, "");...more page marking operations...p.end_page();...p.close_image(template);All text, graphics, and color functions can be used on a template. However, the followingfunctions must not be used while constructing a template:> PDF_load_image( ): this is not a big restriction since images can be opened outside ofa template definition, and freely be used within a template (but not opened).58 Chapter 3: PDFlib Programming
All interactive functions, since these must always be defined on the page where theyshould appear in the document, and cannot be generated as part of a template.Cookbook A full code sample can be found in the Cookbook topic general/repeated_contents.Template support in third-party software. Templates (form XObjects) are an integralpart of the PDF specification, and can be perfectly viewed and printed with Acrobat.However, not all PDF consumers are prepared to deal with this construct. For example,the Acrobat plugin Enfocus PitStop 5.0 can only move templates, but cannot access individualelements within a template.3.2 Page Descriptions 59
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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
Page 7 and 8: 10.2.2 Block Properties 22710.2.3 W
Page 9: 0 Applying the PDFlib License KeyAl
Page 12 and 13: Licensing options. Different licens
Page 14 and 15: PDFlib TET (Text Extraction Toolkit
Page 16 and 17: PDFlib can be integrated directly i
Page 18 and 19: Improved handling of Chinese, Japan
Page 20 and 21: 1.4 Features in PDFlib/PDFlib+PDI/P
Page 22 and 23: 1.5 Availability of Features in dif
Page 24 and 25: 24 Chapter 1: Introduction
Page 26 and 27: 2.2 COM Binding(This section is onl
Page 28 and 29: necessary. After fatal exceptions t
Page 30 and 31: 2.4 C++ BindingIn addition to the p
Page 32 and 33: PDFlib servlets and Java applicatio
Page 34 and 35: 2.6 .NET Binding(This section is on
Page 36 and 37: More than one way of String handlin
Page 38 and 39: PHP on Windows will find files with
Page 40 and 41: 2.10 REALbasic Binding 1(This secti
Page 42 and 43: Now you can compile your program us
Page 44 and 45: 2.13 Tcl BindingInstalling the PDFl
Page 46 and 47: Error policies. When PDFlib detects
Page 48 and 49: plied), but only the corresponding
Page 50 and 51: name exactly as supplied and try to
Page 52 and 53: 3.1.4 Generating PDF Documents in M
Page 54 and 55: 3.2 Page Descriptions3.2.1 Coordina
Page 56 and 57: In order to facilitate the use of t
Page 60 and 61: 3.3 Working with ColorNote The PDFl
Page 62 and 63: where is the identifier of the col
Page 64 and 65: Rendering Intents. Although PDFlib
Page 66 and 67: p.set_parameter("errorpolicy", "ret
Page 68 and 69: with a thin black border. Initially
Page 70 and 71: }p.begin_page_ext(pagewidth, pagehe
Page 72 and 73: Table 3.5 Parameters for the JavaSc
Page 74 and 75: 4.2 Important Unicode ConceptsChara
Page 76 and 77: 4.3 Strings in PDFlib4.3.1 String T
Page 78 and 79: EBCDIC UTF-8 BOM). If the usehypert
Page 80 and 81: values 0x7B and 0x7D must be preced
Page 82 and 83: Table 4.4 Availability of glyphs fo
Page 84 and 85: exclam 33 0x0021...If no Unicode va
Page 86 and 87: Table 4.5 Predefined CMaps for Japa
Page 88 and 89: 4.6 Addressing Characters and Glyph
Page 90 and 91: Table 4.8 Control characters and th
Page 92 and 93: glyphcheck=replace: silent approach
Page 94 and 95: 94 Chapter 4: Unicode and Legacy En
Page 96 and 97: 5.1.2 Font EncodingsAll fonts for t
Page 98 and 99: 5.2 Font Format Details5.2.1 PostSc
Page 100 and 101: the contents of the characters in a
Page 102 and 103: Path resource category (again, the
Page 104 and 105: When working with host fonts it is
Page 106 and 107: 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
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To increase the box height to match
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Fig. 7.48 Using the image matchbox
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size of a page. Determining the pag
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8.3 Composite Data Structures and I
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Table 8.2 pCOS path prefixesprefixl
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Table 8.3 Universal pseudo objectso
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Table 8.4 Pseudo objects for PDF ob
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Table 8.5 Pseudo objects for resour
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194 Chapter 8: The pCOS Interface
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Table 9.2 PDFlib features for PDF 1
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to disable any access restrictions.
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Table 9.4 Access restriction keywor
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9.4 PDF/X for Print Production9.4.1
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Table 9.6 Operations which must be
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work as a full PDF/X validator or t
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9.5.2 Generating PDF/A-conforming O
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Table 9.11 Additional requirements
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This statement will retrieve a stri
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Table 9.16 Predefined XMP schemas f
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9.6 Tagged PDFTagged PDF is a certa
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quired, but will enhance the qualit
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* 1 create top part of left column
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optlist = "Title=Insert parent=" +
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exported to other formats. If the A
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Click Add... and select the PDFlib
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scaling factor or rotation. For eac
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10.3 Using the PDFlib Block Plugin
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next step other objects which are p
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Use Ctrl-V (on Windows) or Cmd-V (o
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Associating form fields with corres
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Property overrides can be achieved
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10.5 Standard Properties for Automa
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10.5.2 Text PropertiesText-related
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Table 10.6 Textflow block propertie
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Table 10.6 Textflow block propertie
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10.6 Querying Block Names and Prope
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10.7 PDFlib Block SpecificationThe
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Example. The following fragment sho
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254 Chapter 10: Variable Data and B
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256
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Ffeatures of PDFlib 20fill 57font m
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TrimBox 57TrueType fonts 95TTC (Tru
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