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2291 lines
42 KiB
Groff
2291 lines
42 KiB
Groff
.TH pdfio 3 "pdf read/write library" "2021-07-07" "pdf read/write library"
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.SH NAME
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pdfio \- pdf read/write library
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.SH Introduction
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.PP
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PDFio is a simple C library for reading and writing PDF files. The primary goals of pdfio are:
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.IP \(bu 5
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.PP
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Read any PDF file with or without encryption or linearization
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.IP \(bu 5
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.PP
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Write PDF files without encryption or linearization
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.IP \(bu 5
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.PP
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Extract or embed useful metadata (author, creator, page information, etc.)
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.IP \(bu 5
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.PP
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"Filter" PDF files, for example to extract a range of pages or to embed fonts that are missing from a PDF
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.IP \(bu 5
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.PP
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Provide access to objects used for each page
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.PP
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PDFio is
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.I not
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concerned with rendering or viewing a PDF file, although a PDF RIP or viewer could be written using it.
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.PP
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PDFio is Copyright \[co] 2021 by Michael R Sweet and is licensed under the Apache License Version 2.0 with an (optional) exception to allow linking against GPL2/LGPL2 software. See the files "LICENSE" and "NOTICE" for more information.
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.SS Requirements
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.PP
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PDFio requires the following to build the software:
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.IP \(bu 5
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.PP
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A C99 compiler such as Clang, GCC, or MS Visual C
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.IP \(bu 5
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.PP
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A POSIX\-compliant make program
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.IP \(bu 5
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.PP
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ZLIB (https://www.zlib.net) 1.0 or higher
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.PP
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IDE files for Xcode (macOS/iOS) and Visual Studio (Windows) are also provided.
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.SS Installing pdfio
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.PP
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PDFio comes with a portable makefile that will work on any POSIX\-compliant system with ZLIB installed. To make it, run:
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.nf
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make all
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.fi
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.PP
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To test it, run:
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.nf
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make test
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.fi
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.PP
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To install it, run:
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.nf
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make install
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.fi
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.PP
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If you want a shared library, run:
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.nf
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make all\-shared
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make install\-shared
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.fi
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.PP
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The default installation location is "/usr/local". Pass the prefix variable to make to install it to another location:
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.nf
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make install prefix=/some/other/directory
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.fi
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.PP
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The makefile installs the pdfio header to "${prefix}/include", the library to "${prefix}/lib", the pkg\-config file to "${prefix}/lib/pkgconfig", the man page to "${prefix}/share/man/man3", and the documentation to "${prefix}/share/doc/pdfio".
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.PP
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The makefile supports the following variables that can be specified in the make command or as environment variables:
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.IP \(bu 5
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.PP
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AR: the library archiver (default "ar")
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.IP \(bu 5
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.PP
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ARFLAGS: options for the library archiver (default "cr")
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.IP \(bu 5
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.PP
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CC: the C compiler (default "cc")
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.IP \(bu 5
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.PP
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CFLAGS: options for the C compiler (default "")
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.IP \(bu 5
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.PP
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CODESIGN_IDENTITY: the identity to use when code signing the shared library on macOS (default "Developer ID")
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.IP \(bu 5
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.PP
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COMMONFLAGS: options for the C compiler and linker (typically architecture and optimization options, default is "\-Os \-g")
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.IP \(bu 5
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.PP
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CPPFLAGS: options for the C preprocessor (default "")
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.IP \(bu 5
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.PP
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DESTDIR" and "DSTROOT: specifies a root directory when installing (default is "", specify only one)
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.IP \(bu 5
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.PP
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DSOFLAGS: options for the C compiler when linking the shared library (default "")
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.IP \(bu 5
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.PP
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LDFLAGS: options for the C compiler when linking the test programs (default "")
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.IP \(bu 5
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.PP
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LIBS: library options when linking the test programs (default "\-lz")
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.IP \(bu 5
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.PP
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RANLIB: program that generates a table\-of\-contents in a library (default "ranlib")
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.IP \(bu 5
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.PP
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prefix: specifies the installation directory (default "/usr/local")
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.SS Visual Studio Project
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.PP
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The Visual Studio solution ("pdfio.sln") is provided for Windows developers and generates both a static library and DLL.
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.SS Xcode Project
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.PP
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There is also an Xcode project ("pdfio.xcodeproj") you can use on macOS which generates a static library that will be installed under "/usr/local" with:
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.nf
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sudo xcodebuild install
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.fi
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.PP
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You can reproduce this with the makefile using:
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.nf
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sudo make 'COMMONFLAGS="\-Os \-mmacosx\-version\-min=10.14 \-arch x86_64 \-arch arm64"' install
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.fi
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.SS Detecting PDFio
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.PP
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PDFio can be detected using the pkg\-config command, for example:
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.nf
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if pkg\-config \-\-exists pdfio; then
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...
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fi
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.fi
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.PP
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In a makefile you can add the necessary compiler and linker options with:
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.nf
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CFLAGS += `pkg\-config \-\-cflags pdfio`
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LIBS += `pkg\-config \-\-libs pdfio`
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.fi
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.PP
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On Windows, you need to link to the PDFIO.LIB (static) or PDFIO1.LIB (DLL) libraries and include the "zlib" NuGet package dependency.
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.SS Header Files
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.PP
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PDFio provides a primary header file that is always used:
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.nf
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#include <pdfio.h>
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.fi
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.PP
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PDFio also provides helper functions for producing PDF content that are defined in a separate header file:
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.nf
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#include <pdfio\-content.h>
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.fi
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.SH API Overview
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.PP
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PDFio exposes several types:
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.IP \(bu 5
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.PP
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pdfio_file_t: A PDF file (for reading or writing)
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.IP \(bu 5
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.PP
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pdfio_array_t: An array of values
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.IP \(bu 5
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.PP
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pdfio_dict_t: A dictionary of key/value pairs in a PDF file, object, etc.
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.IP \(bu 5
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.PP
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pdfio_obj_t: An object in a PDF file
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.IP \(bu 5
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.PP
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pdfio_stream_t: An object stream
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.SS Reading PDF Files
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.PP
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You open an existing PDF file using the pdfioFileOpen function:
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.nf
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pdfio_file_t *pdf = pdfioFileOpen("myinputfile.pdf", error_cb, error_data);
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.fi
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.PP
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where the three arguments to the function are the filename ("myinputfile.pdf"), an optional error callback function (error_cb), and an optional pointer value for the error callback function (error_data). The error callback is called for both errors and warnings and accepts the pdfio_file_t pointer, a message string, and the callback pointer value, for example:
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.nf
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bool
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error_cb(pdfio_file_t *pdf, const char *message, void *data)
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{
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(void)data; // This callback does not use the data pointer
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fprintf(stderr, "%s: %s\\n", pdfioFileGetName(pdf), message);
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// Return false to treat warnings as errors
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return (false);
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}
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.fi
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.PP
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The default error callback (NULL) does the equivalent of the above.
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.PP
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Each PDF file contains one or more pages. The pdfioFileGetNumPages function returns the number of pages in the file while the pdfioFileGetPage function gets the specified page in the PDF file:
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.nf
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pdfio_file_t *pdf; // PDF file
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size_t i; // Looping var
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size_t count; // Number of pages
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pdfio_obj_t *page; // Current page
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// Iterate the pages in the PDF file
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for (i = 0, count = pdfioFileGetNumPages(pdf); i < count; i ++)
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{
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page = pdfioFileGetPage(pdf, i);
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// do something with page
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}
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.fi
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.PP
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Each page is represented by a "page tree" object (what pdfioFileGetPage returns) that specifies information about the page and one or more "content" objects that contain the images, fonts, text, and graphics that appear on the page.
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.PP
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The pdfioFileClose function closes a PDF file and frees all memory that was used for it:
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.nf
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pdfioFileClose(pdf);
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.fi
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.SS Writing PDF Files
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.PP
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You create a new PDF file using the pdfioFileCreate function:
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.nf
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pdfio_rect_t media_box = { 0.0, 0.0, 612.0, 792.0 }; // US Letter
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pdfio_rect_t crop_box = { 36.0, 36.0, 576.0, 756.0 }; // 0.5" margins
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pdfio_file_t *pdf = pdfioFileCreate("myoutputfile.pdf", "2.0", &media_box, &crop_box, error_cb, error_data);
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.fi
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.PP
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where the six arguments to the function are the filename ("myoutputfile.pdf"), PDF version ("2.0"), media box (media_box), crop box (crop_box), an optional error callback function (error_cb), and an optional pointer value for the error callback function (error_data).
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.PP
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Once the file is created, use the pdfioFileCreateObj, pdfioFileCreatePage, and pdfioPageCopy functions to create objects and pages in the file.
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.PP
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Finally, the pdfioFileClose function writes the PDF cross\-reference and "trailer" information, closes the file, and frees all memory that was used for it.
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.SS PDF Objects
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.PP
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PDF objects are identified using two numbers \- the object number (1 to N) and the object generation (0 to 65535) that specifies a particular version of an object. An object's numbers are returned by the pdfioObjGetNumber and pdfioObjGetGeneration functions. You can find a numbered object using the pdfioFileFindObj function.
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.PP
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Objects contain values (typically dictionaries) and usually an associated data stream containing images, fonts, ICC profiles, and page content. PDFio provides several accessor functions to get the value(s) associated with an object:
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.IP \(bu 5
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.PP
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pdfioObjGetArray returns an object's array value, if any
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.IP \(bu 5
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.PP
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pdfioObjGetDict returns an object's dictionary value, if any
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.IP \(bu 5
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.PP
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pdfioObjGetLength returns the length of the data stream, if any
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.IP \(bu 5
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.PP
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pdfioObjGetSubtype returns the sub\-type name of the object, for example "Image" for an image object.
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.IP \(bu 5
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.PP
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pdfioObjGetType returns the type name of the object, for example "XObject" for an image object.
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.SS PDF Streams
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.SS PDF Content Helper Functions
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.SH ENUMERATIONS
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.SS pdfio_filter_e
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Compression/decompression filters for streams
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.TP 5
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PDFIO_FILTER_ASCII85
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.br
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ASCII85Decode filter (reading only)
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.TP 5
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PDFIO_FILTER_ASCIIHEX
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.br
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ASCIIHexDecode filter (reading only)
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.TP 5
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PDFIO_FILTER_CCITTFAX
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.br
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CCITTFaxDecode filter
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.TP 5
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PDFIO_FILTER_CRYPT
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.br
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Encryption filter
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.TP 5
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PDFIO_FILTER_DCT
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.br
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DCTDecode (JPEG) filter
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.TP 5
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PDFIO_FILTER_FLATE
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.br
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FlateDecode filter
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.TP 5
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PDFIO_FILTER_JBIG2
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.br
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JBIG2Decode filter
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.TP 5
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PDFIO_FILTER_JPX
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.br
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JPXDecode filter (reading only)
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.TP 5
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PDFIO_FILTER_LZW
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.br
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LZWDecode filter (reading only)
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.TP 5
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PDFIO_FILTER_NONE
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.br
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No filter
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.TP 5
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PDFIO_FILTER_RUNLENGTH
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.br
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RunLengthDecode filter (reading only)
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.SS pdfio_valtype_e
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PDF value types
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.TP 5
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PDFIO_VALTYPE_ARRAY
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.br
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Array
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.TP 5
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PDFIO_VALTYPE_BINARY
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.br
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Binary data
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.TP 5
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PDFIO_VALTYPE_BOOLEAN
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.br
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Boolean
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.TP 5
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PDFIO_VALTYPE_DATE
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.br
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Date/time
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.TP 5
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PDFIO_VALTYPE_DICT
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.br
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Dictionary
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.TP 5
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PDFIO_VALTYPE_INDIRECT
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.br
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Indirect object (N G obj)
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.TP 5
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PDFIO_VALTYPE_NAME
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.br
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Name
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.TP 5
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PDFIO_VALTYPE_NONE
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.br
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No value, not set
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.TP 5
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PDFIO_VALTYPE_NULL
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.br
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Null object
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.TP 5
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PDFIO_VALTYPE_NUMBER
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.br
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Number (integer or real)
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.TP 5
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PDFIO_VALTYPE_STRING
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.br
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String
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.SH FUNCTIONS
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.SS pdfioArrayAppendArray
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Add an array value to an array.
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.PP
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.nf
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bool pdfioArrayAppendArray (
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pdfio_array_t *a,
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pdfio_array_t *value
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);
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.fi
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.SS pdfioArrayAppendBinary
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Add a binary string value to an array.
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.PP
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.nf
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bool pdfioArrayAppendBinary (
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pdfio_array_t *a,
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const unsigned char *value,
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size_t valuelen
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);
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.fi
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.SS pdfioArrayAppendBoolean
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Add a boolean value to an array.
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.PP
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.nf
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bool pdfioArrayAppendBoolean (
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pdfio_array_t *a,
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bool value
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);
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.fi
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.SS pdfioArrayAppendDate
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Add a date value to an array.
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.PP
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.nf
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bool pdfioArrayAppendDate (
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pdfio_array_t *a,
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time_t value
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);
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.fi
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.SS pdfioArrayAppendDict
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Add a dictionary to an array.
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.PP
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.nf
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bool pdfioArrayAppendDict (
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pdfio_array_t *a,
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pdfio_dict_t *value
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);
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.fi
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.SS pdfioArrayAppendName
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Add a name to an array.
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.PP
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.nf
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bool pdfioArrayAppendName (
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pdfio_array_t *a,
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const char *value
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);
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.fi
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.SS pdfioArrayAppendNumber
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Add a number to an array.
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.PP
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.nf
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bool pdfioArrayAppendNumber (
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pdfio_array_t *a,
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double value
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);
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.fi
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.SS pdfioArrayAppendObj
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Add an indirect object reference to an array.
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.PP
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.nf
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bool pdfioArrayAppendObj (
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pdfio_array_t *a,
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pdfio_obj_t *value
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);
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.fi
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.SS pdfioArrayAppendString
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Add a string to an array.
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.PP
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.nf
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bool pdfioArrayAppendString (
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pdfio_array_t *a,
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const char *value
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);
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.fi
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.SS pdfioArrayCopy
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Copy an array.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCopy (
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pdfio_file_t *pdf,
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pdfio_array_t *a
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);
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.fi
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.SS pdfioArrayCreate
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Create an empty array.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCreate (
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pdfio_file_t *pdf
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);
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.fi
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.SS pdfioArrayCreateColorFromICCObj
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Create an ICC-based color space array.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCreateColorFromICCObj (
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pdfio_file_t *pdf,
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pdfio_obj_t *icc_object
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);
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.fi
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.SS pdfioArrayCreateColorFromMatrix
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Create a calibrated color space array using a CIE XYZ transform matrix.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCreateColorFromMatrix (
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pdfio_file_t *pdf,
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size_t num_colors,
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double gamma,
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const double matrix[3][3],
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const double white_point[3]
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);
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.fi
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|
.SS pdfioArrayCreateColorFromPalette
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|
Create an indexed color space array.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCreateColorFromPalette (
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pdfio_file_t *pdf,
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size_t num_colors,
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const unsigned char *colors
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);
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.fi
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|
.SS pdfioArrayCreateColorFromPrimaries
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|
Create a calibrated color sapce array using CIE xy primary chromacities.
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.PP
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.nf
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|
pdfio_array_t * pdfioArrayCreateColorFromPrimaries (
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pdfio_file_t *pdf,
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size_t num_colors,
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double gamma,
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double wx,
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double wy,
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double rx,
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double ry,
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double gx,
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double gy,
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double bx,
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double by
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);
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.fi
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.SS pdfioArrayGetArray
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|
Get an array value from an array.
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.PP
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.nf
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|
pdfio_array_t * pdfioArrayGetArray (
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pdfio_array_t *a,
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size_t n
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);
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.fi
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.SS pdfioArrayGetBinary
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|
Get a binary string value from an array.
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.PP
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.nf
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unsigned char * pdfioArrayGetBinary (
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pdfio_array_t *a,
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size_t n,
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size_t *length
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);
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.fi
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|
.SS pdfioArrayGetBoolean
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|
Get a boolean value from an array.
|
|
.PP
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.nf
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|
bool pdfioArrayGetBoolean (
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pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetDate
|
|
Get a date value from an array.
|
|
.PP
|
|
.nf
|
|
time_t pdfioArrayGetDate (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetDict
|
|
Get a dictionary value from an array.
|
|
.PP
|
|
.nf
|
|
pdfio_dict_t * pdfioArrayGetDict (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetName
|
|
Get a name value from an array.
|
|
.PP
|
|
.nf
|
|
const char * pdfioArrayGetName (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetNumber
|
|
Get a number from an array.
|
|
.PP
|
|
.nf
|
|
double pdfioArrayGetNumber (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetObj
|
|
Get an indirect object reference from an array.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioArrayGetObj (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetSize
|
|
Get the length of an array.
|
|
.PP
|
|
.nf
|
|
size_t pdfioArrayGetSize (
|
|
pdfio_array_t *a
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetString
|
|
Get a string value from an array.
|
|
.PP
|
|
.nf
|
|
const char * pdfioArrayGetString (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioArrayGetType
|
|
Get a value type from an array.
|
|
.PP
|
|
.nf
|
|
pdfio_valtype_t pdfioArrayGetType (
|
|
pdfio_array_t *a,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioContentClip
|
|
Clip output to the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentClip (
|
|
pdfio_stream_t *st,
|
|
bool even_odd
|
|
);
|
|
.fi
|
|
.SS pdfioContentDrawImage
|
|
Draw an image object.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentDrawImage (
|
|
pdfio_stream_t *st,
|
|
const char *name,
|
|
double x,
|
|
double y,
|
|
double width,
|
|
double height
|
|
);
|
|
.fi
|
|
.PP
|
|
The object name must be part of the page dictionary resources, typically
|
|
using the \fIpdfioPageDictAddImage\fR function.
|
|
.SS pdfioContentFill
|
|
Fill the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentFill (
|
|
pdfio_stream_t *st,
|
|
bool even_odd
|
|
);
|
|
.fi
|
|
.SS pdfioContentFillAndStroke
|
|
Fill and stroke the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentFillAndStroke (
|
|
pdfio_stream_t *st,
|
|
bool even_odd
|
|
);
|
|
.fi
|
|
.SS pdfioContentMatrixConcat
|
|
Concatenate a matrix to the current graphics
|
|
state.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentMatrixConcat (
|
|
pdfio_stream_t *st,
|
|
pdfio_matrix_t m
|
|
);
|
|
.fi
|
|
.SS pdfioContentMatrixRotate
|
|
Rotate the current transform matrix.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentMatrixRotate (
|
|
pdfio_stream_t *st,
|
|
double degrees
|
|
);
|
|
.fi
|
|
.SS pdfioContentMatrixScale
|
|
Scale the current transform matrix.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentMatrixScale (
|
|
pdfio_stream_t *st,
|
|
double sx,
|
|
double sy
|
|
);
|
|
.fi
|
|
.SS pdfioContentMatrixTranslate
|
|
Translate the current transform matrix.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentMatrixTranslate (
|
|
pdfio_stream_t *st,
|
|
double tx,
|
|
double ty
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathClose
|
|
Close the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathClose (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathCurve
|
|
Add a Bezier curve with two control points.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathCurve (
|
|
pdfio_stream_t *st,
|
|
double x1,
|
|
double y1,
|
|
double x2,
|
|
double y2,
|
|
double x3,
|
|
double y3
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathCurve13
|
|
Add a Bezier curve with an initial control point.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathCurve13 (
|
|
pdfio_stream_t *st,
|
|
double x1,
|
|
double y1,
|
|
double x3,
|
|
double y3
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathCurve23
|
|
Add a Bezier curve with a trailing control point.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathCurve23 (
|
|
pdfio_stream_t *st,
|
|
double x2,
|
|
double y2,
|
|
double x3,
|
|
double y3
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathLineTo
|
|
Add a straight line to the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathLineTo (
|
|
pdfio_stream_t *st,
|
|
double x,
|
|
double y
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathMoveTo
|
|
Start a new subpath.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathMoveTo (
|
|
pdfio_stream_t *st,
|
|
double x,
|
|
double y
|
|
);
|
|
.fi
|
|
.SS pdfioContentPathRect
|
|
Add a rectangle to the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentPathRect (
|
|
pdfio_stream_t *st,
|
|
double x,
|
|
double y,
|
|
double width,
|
|
double height
|
|
);
|
|
.fi
|
|
.SS pdfioContentRestore
|
|
Restore a previous graphics state.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentRestore (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentSave
|
|
Save the current graphics state.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSave (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetDashPattern
|
|
Set the stroke pattern.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetDashPattern (
|
|
pdfio_stream_t *st,
|
|
int phase,
|
|
int on,
|
|
int off
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorDeviceCMYK
|
|
Set device CMYK fill color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorDeviceCMYK (
|
|
pdfio_stream_t *st,
|
|
double c,
|
|
double m,
|
|
double y,
|
|
double k
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorDeviceGray
|
|
Set the device gray fill color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorDeviceGray (
|
|
pdfio_stream_t *st,
|
|
double g
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorDeviceRGB
|
|
Set the device RGB fill color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorDeviceRGB (
|
|
pdfio_stream_t *st,
|
|
double r,
|
|
double g,
|
|
double b
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorGray
|
|
Set the calibrated gray fill color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorGray (
|
|
pdfio_stream_t *st,
|
|
double g
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorRGB
|
|
Set the calibrated RGB fill color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorRGB (
|
|
pdfio_stream_t *st,
|
|
double r,
|
|
double g,
|
|
double b
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFillColorSpace
|
|
Set the fill colorspace.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFillColorSpace (
|
|
pdfio_stream_t *st,
|
|
const char *name
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetFlatness
|
|
Set the flatness tolerance.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetFlatness (
|
|
pdfio_stream_t *st,
|
|
double flatness
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetLineCap
|
|
Set the line ends style.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetLineCap (
|
|
pdfio_stream_t *st,
|
|
pdfio_linecap_t lc
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetLineJoin
|
|
Set the line joining style.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetLineJoin (
|
|
pdfio_stream_t *st,
|
|
pdfio_linejoin_t lj
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetLineWidth
|
|
Set the line width.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetLineWidth (
|
|
pdfio_stream_t *st,
|
|
double width
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetMiterLimit
|
|
Set the miter limit.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetMiterLimit (
|
|
pdfio_stream_t *st,
|
|
double limit
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorDeviceCMYK
|
|
Set the device CMYK stroke color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorDeviceCMYK (
|
|
pdfio_stream_t *st,
|
|
double c,
|
|
double m,
|
|
double y,
|
|
double k
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorDeviceGray
|
|
Set the device gray stroke color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorDeviceGray (
|
|
pdfio_stream_t *st,
|
|
double g
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorDeviceRGB
|
|
Set the device RGB stroke color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorDeviceRGB (
|
|
pdfio_stream_t *st,
|
|
double r,
|
|
double g,
|
|
double b
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorGray
|
|
Set the calibrated gray stroke color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorGray (
|
|
pdfio_stream_t *st,
|
|
double g
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorRGB
|
|
Set the calibrated RGB stroke color.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorRGB (
|
|
pdfio_stream_t *st,
|
|
double r,
|
|
double g,
|
|
double b
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetStrokeColorSpace
|
|
Set the stroke color space.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetStrokeColorSpace (
|
|
pdfio_stream_t *st,
|
|
const char *name
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextCharacterSpacing
|
|
Set the spacing between characters.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextCharacterSpacing (
|
|
pdfio_stream_t *st,
|
|
double spacing
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextFont
|
|
Set the text font and size.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextFont (
|
|
pdfio_stream_t *st,
|
|
const char *name,
|
|
double size
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextLeading
|
|
Set text leading (line height) value.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextLeading (
|
|
pdfio_stream_t *st,
|
|
double leading
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextMatrix
|
|
Set the text transform matrix.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextMatrix (
|
|
pdfio_stream_t *st,
|
|
pdfio_matrix_t m
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextRenderingMode
|
|
Set the text rendering mode.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextRenderingMode (
|
|
pdfio_stream_t *st,
|
|
pdfio_textrendering_t mode
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextRise
|
|
Set the text baseline offset.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextRise (
|
|
pdfio_stream_t *st,
|
|
double rise
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextWordSpacing
|
|
Set the inter-word spacing.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextWordSpacing (
|
|
pdfio_stream_t *st,
|
|
double spacing
|
|
);
|
|
.fi
|
|
.SS pdfioContentSetTextXScaling
|
|
Set the horizontal scaling value.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentSetTextXScaling (
|
|
pdfio_stream_t *st,
|
|
double percent
|
|
);
|
|
.fi
|
|
.SS pdfioContentStroke
|
|
Stroke the current path.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentStroke (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextBegin
|
|
Begin a text block.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextBegin (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextEnd
|
|
End a text block.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextEnd (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextMoveLine
|
|
Move to the next line and offset.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextMoveLine (
|
|
pdfio_stream_t *st,
|
|
double tx,
|
|
double ty
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextMoveTo
|
|
Offset within the current line.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextMoveTo (
|
|
pdfio_stream_t *st,
|
|
double tx,
|
|
double ty
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextNextLine
|
|
Move to the next line.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextNextLine (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioContentTextShow
|
|
Show text.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextShow (
|
|
pdfio_stream_t *st,
|
|
bool unicode,
|
|
const char *s
|
|
);
|
|
.fi
|
|
.PP
|
|
This function shows some text in a PDF content stream. The "unicode" argument
|
|
specifies that the current font maps to full Unicode. The "s" argument
|
|
specifies a UTF-8 encoded string.
|
|
.SS pdfioContentTextShowJustified
|
|
Show justified text.
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextShowJustified (
|
|
pdfio_stream_t *st,
|
|
bool unicode,
|
|
size_t num_fragments,
|
|
const double *offsets,
|
|
const char *const *fragments
|
|
);
|
|
.fi
|
|
.PP
|
|
This function shows some text in a PDF content stream. The "unicode" argument
|
|
specifies that the current font maps to full Unicode. The "fragments"
|
|
argument specifies an array of UTF-8 encoded strings.
|
|
.SS pdfioContentTextShowf
|
|
|
|
.PP
|
|
.nf
|
|
bool pdfioContentTextShowf (
|
|
pdfio_stream_t *st,
|
|
bool unicode,
|
|
const char *format,
|
|
...
|
|
);
|
|
.fi
|
|
.SS pdfioDictCopy
|
|
Copy a dictionary to a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_dict_t * pdfioDictCopy (
|
|
pdfio_file_t *pdf,
|
|
pdfio_dict_t *dict
|
|
);
|
|
.fi
|
|
.SS pdfioDictCreate
|
|
Create a dictionary to hold key/value pairs.
|
|
.PP
|
|
.nf
|
|
pdfio_dict_t * pdfioDictCreate (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetArray
|
|
Get a key array value from a dictionary.
|
|
.PP
|
|
.nf
|
|
pdfio_array_t * pdfioDictGetArray (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetBinary
|
|
Get a key binary string value from a dictionary.
|
|
.PP
|
|
.nf
|
|
unsigned char * pdfioDictGetBinary (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
size_t *length
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetBoolean
|
|
Get a key boolean value from a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictGetBoolean (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetDate
|
|
Get a date value from a dictionary.
|
|
.PP
|
|
.nf
|
|
time_t pdfioDictGetDate (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetDict
|
|
Get a key dictionary value from a dictionary.
|
|
.PP
|
|
.nf
|
|
pdfio_dict_t * pdfioDictGetDict (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetName
|
|
Get a key name value from a dictionary.
|
|
.PP
|
|
.nf
|
|
const char * pdfioDictGetName (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetNumber
|
|
Get a key number value from a dictionary.
|
|
.PP
|
|
.nf
|
|
double pdfioDictGetNumber (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetObj
|
|
Get a key indirect object value from a dictionary.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioDictGetObj (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetRect
|
|
Get a key rectangle value from a dictionary.
|
|
.PP
|
|
.nf
|
|
pdfio_rect_t * pdfioDictGetRect (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
pdfio_rect_t *rect
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetString
|
|
Get a key string value from a dictionary.
|
|
.PP
|
|
.nf
|
|
const char * pdfioDictGetString (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictGetType
|
|
Get a key value type from a dictionary.
|
|
.PP
|
|
.nf
|
|
pdfio_valtype_t pdfioDictGetType (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetArray
|
|
Set a key array in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetArray (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
pdfio_array_t *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetBinary
|
|
Set a key binary string in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetBinary (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
const unsigned char *value,
|
|
size_t valuelen
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetBoolean
|
|
Set a key boolean in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetBoolean (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
bool value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetDate
|
|
Set a date value in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetDate (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
time_t value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetDict
|
|
Set a key dictionary in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetDict (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
pdfio_dict_t *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetName
|
|
Set a key name in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetName (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetNull
|
|
Set a key null in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetNull (
|
|
pdfio_dict_t *dict,
|
|
const char *key
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetNumber
|
|
Set a key number in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetNumber (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
double value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetObj
|
|
Set a key indirect object reference in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetObj (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
pdfio_obj_t *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetRect
|
|
Set a key rectangle in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetRect (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
pdfio_rect_t *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetString
|
|
Set a key literal string in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetString (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioDictSetStringf
|
|
Set a key formatted string in a dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioDictSetStringf (
|
|
pdfio_dict_t *dict,
|
|
const char *key,
|
|
const char *format,
|
|
...
|
|
);
|
|
.fi
|
|
.SS pdfioFileClose
|
|
Close a PDF file and free all memory used for it.
|
|
.PP
|
|
.nf
|
|
bool pdfioFileClose (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileCreate
|
|
Create a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_file_t * pdfioFileCreate (
|
|
const char *filename,
|
|
const char *version,
|
|
pdfio_rect_t *media_box,
|
|
pdfio_rect_t *crop_box,
|
|
pdfio_error_cb_t error_cb,
|
|
void *error_data
|
|
);
|
|
.fi
|
|
.SS pdfioFileCreateArrayObj
|
|
Create a new object in a PDF file containing an array.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateArrayObj (
|
|
pdfio_file_t *pdf,
|
|
pdfio_array_t *array
|
|
);
|
|
.fi
|
|
.PP
|
|
This function creates a new object with an array value in a PDF file.
|
|
You must call \fIpdfioObjClose\fR to write the object to the file.
|
|
.SS pdfioFileCreateFontObjFromBase
|
|
Create one of the base 14 PDF fonts.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateFontObjFromBase (
|
|
pdfio_file_t *pdf,
|
|
const char *name
|
|
);
|
|
.fi
|
|
.PP
|
|
This function creates one of the base 14 PDF fonts. The "name" parameter
|
|
specifies the font nane:
|
|
.PP
|
|
.IP \(bu 5
|
|
\fBCourier\fR
|
|
.IP \(bu 5
|
|
\fBCourier-Bold\fR
|
|
.IP \(bu 5
|
|
\fBCourier-BoldItalic\fR
|
|
.IP \(bu 5
|
|
\fBCourier-Italic\fR
|
|
.IP \(bu 5
|
|
\fBHelvetica\fR
|
|
.IP \(bu 5
|
|
\fBHelvetica-Bold\fR
|
|
.IP \(bu 5
|
|
\fBHelvetica-BoldOblique\fR
|
|
.IP \(bu 5
|
|
\fBHelvetica-Oblique\fR
|
|
.IP \(bu 5
|
|
\fBSymbol\fR
|
|
.IP \(bu 5
|
|
\fBTimes-Bold\fR
|
|
.IP \(bu 5
|
|
\fBTimes-BoldItalic\fR
|
|
.IP \(bu 5
|
|
\fBTimes-Italic\fR
|
|
.IP \(bu 5
|
|
\fBTimes-Roman\fR
|
|
.IP \(bu 5
|
|
\fBZapfDingbats\fR
|
|
.PP
|
|
Base fonts always use the Windows CP1252 (ISO-8859-1 with additional
|
|
characters such as the Euro symbol) subset of Unicode.
|
|
.SS pdfioFileCreateFontObjFromFile
|
|
Add a font object to a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateFontObjFromFile (
|
|
pdfio_file_t *pdf,
|
|
const char *filename,
|
|
bool unicode
|
|
);
|
|
.fi
|
|
.PP
|
|
This function embeds a TrueType/OpenType font into a PDF file. The
|
|
"unicode" parameter controls whether the font is encoded for two-byte
|
|
characters (potentially full Unicode, but more typically a subset)
|
|
or to only support the Windows CP1252 (ISO-8859-1 with additional
|
|
characters such as the Euro symbol) subset of Unicode.
|
|
.SS pdfioFileCreateICCObjFromFile
|
|
Add an ICC profile object to a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateICCObjFromFile (
|
|
pdfio_file_t *pdf,
|
|
const char *filename,
|
|
size_t num_colors
|
|
);
|
|
.fi
|
|
.SS pdfioFileCreateImageObjFromFile
|
|
Add an image object to a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateImageObjFromFile (
|
|
pdfio_file_t *pdf,
|
|
const char *filename,
|
|
bool interpolate
|
|
);
|
|
.fi
|
|
.PP
|
|
This function creates an image object in a PDF file from a JPEG or PNG file.
|
|
.PP
|
|
.IP 5
|
|
Note: Currently PNG support is limited to grayscale, RGB, or indexed files
|
|
.IP 5
|
|
without interlacing or alpha. Transparency (masking) based on color/index
|
|
.IP 5
|
|
is supported.
|
|
.SS pdfioFileCreateObj
|
|
Create a new object in a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileCreateObj (
|
|
pdfio_file_t *pdf,
|
|
pdfio_dict_t *dict
|
|
);
|
|
.fi
|
|
.SS pdfioFileCreatePage
|
|
Create a page in a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_stream_t * pdfioFileCreatePage (
|
|
pdfio_file_t *pdf,
|
|
pdfio_dict_t *dict
|
|
);
|
|
.fi
|
|
.SS pdfioFileFindObj
|
|
Find an object using its object number.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileFindObj (
|
|
pdfio_file_t *pdf,
|
|
size_t number
|
|
);
|
|
.fi
|
|
.PP
|
|
This differs from \fIpdfioFileGetObj\fR which takes an index into the
|
|
list of objects while this function takes the object number.
|
|
.SS pdfioFileGetAuthor
|
|
Get the author for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetAuthor (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetCreationDate
|
|
Get the creation date for a PDF file.
|
|
.PP
|
|
.nf
|
|
time_t pdfioFileGetCreationDate (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetCreator
|
|
Get the creator string for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetCreator (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetID
|
|
Get the PDF file's ID strings.
|
|
.PP
|
|
.nf
|
|
pdfio_array_t * pdfioFileGetID (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetKeywords
|
|
Get the keywords for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetKeywords (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetName
|
|
Get a PDF's filename.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetName (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetNumObjs
|
|
Get the number of objects in a PDF file.
|
|
.PP
|
|
.nf
|
|
size_t pdfioFileGetNumObjs (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetNumPages
|
|
Get the number of pages in a PDF file.
|
|
.PP
|
|
.nf
|
|
size_t pdfioFileGetNumPages (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetObj
|
|
Get an object from a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileGetObj (
|
|
pdfio_file_t *pdf,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetPage
|
|
Get a page object from a PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioFileGetPage (
|
|
pdfio_file_t *pdf,
|
|
size_t n
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetProducer
|
|
Get the producer string for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetProducer (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetSubject
|
|
Get the subject for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetSubject (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetTitle
|
|
Get the title for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetTitle (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileGetVersion
|
|
Get the PDF version number for a PDF file.
|
|
.PP
|
|
.nf
|
|
const char * pdfioFileGetVersion (
|
|
pdfio_file_t *pdf
|
|
);
|
|
.fi
|
|
.SS pdfioFileOpen
|
|
Open a PDF file for reading.
|
|
.PP
|
|
.nf
|
|
pdfio_file_t * pdfioFileOpen (
|
|
const char *filename,
|
|
pdfio_error_cb_t error_cb,
|
|
void *error_data
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetAuthor
|
|
Set the author for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetAuthor (
|
|
pdfio_file_t *pdf,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetCreationDate
|
|
Set the creation date for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetCreationDate (
|
|
pdfio_file_t *pdf,
|
|
time_t value
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetCreator
|
|
Set the creator string for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetCreator (
|
|
pdfio_file_t *pdf,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetKeywords
|
|
Set the keywords string for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetKeywords (
|
|
pdfio_file_t *pdf,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetSubject
|
|
Set the subject for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetSubject (
|
|
pdfio_file_t *pdf,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioFileSetTitle
|
|
Set the title for a PDF file.
|
|
.PP
|
|
.nf
|
|
void pdfioFileSetTitle (
|
|
pdfio_file_t *pdf,
|
|
const char *value
|
|
);
|
|
.fi
|
|
.SS pdfioImageGetBytesPerLine
|
|
Get the number of bytes to read for each line.
|
|
.PP
|
|
.nf
|
|
size_t pdfioImageGetBytesPerLine (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioImageGetHeight
|
|
Get the height of an image object.
|
|
.PP
|
|
.nf
|
|
double pdfioImageGetHeight (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioImageGetWidth
|
|
Get the width of an image object.
|
|
.PP
|
|
.nf
|
|
double pdfioImageGetWidth (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjClose
|
|
Close an object, writing any data as needed to the PDF
|
|
file.
|
|
.PP
|
|
.nf
|
|
bool pdfioObjClose (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjCopy
|
|
Copy an object to another PDF file.
|
|
.PP
|
|
.nf
|
|
pdfio_obj_t * pdfioObjCopy (
|
|
pdfio_file_t *pdf,
|
|
pdfio_obj_t *srcobj
|
|
);
|
|
.fi
|
|
.SS pdfioObjCreateStream
|
|
Create an object (data) stream for writing.
|
|
.PP
|
|
.nf
|
|
pdfio_stream_t * pdfioObjCreateStream (
|
|
pdfio_obj_t *obj,
|
|
pdfio_filter_t filter
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetArray
|
|
Get the array associated with an object.
|
|
.PP
|
|
.nf
|
|
pdfio_array_t * pdfioObjGetArray (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetDict
|
|
Get the dictionary associated with an object.
|
|
.PP
|
|
.nf
|
|
pdfio_dict_t * pdfioObjGetDict (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetGeneration
|
|
Get the object's generation number.
|
|
.PP
|
|
.nf
|
|
unsigned short pdfioObjGetGeneration (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetLength
|
|
Get the length of the object's (data) stream.
|
|
.PP
|
|
.nf
|
|
size_t pdfioObjGetLength (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetNumber
|
|
Get the object's number.
|
|
.PP
|
|
.nf
|
|
size_t pdfioObjGetNumber (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetSubtype
|
|
Get an object's subtype.
|
|
.PP
|
|
.nf
|
|
const char * pdfioObjGetSubtype (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjGetType
|
|
Get an object's type.
|
|
.PP
|
|
.nf
|
|
const char * pdfioObjGetType (
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioObjOpenStream
|
|
Open an object's (data) stream for reading.
|
|
.PP
|
|
.nf
|
|
pdfio_stream_t * pdfioObjOpenStream (
|
|
pdfio_obj_t *obj,
|
|
bool decode
|
|
);
|
|
.fi
|
|
.SS pdfioPageCopy
|
|
Copy a page to a PDF file.
|
|
.PP
|
|
.nf
|
|
bool pdfioPageCopy (
|
|
pdfio_file_t *pdf,
|
|
pdfio_obj_t *srcpage
|
|
);
|
|
.fi
|
|
.SS pdfioPageDictAddColorSpace
|
|
Add a color space to the page dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioPageDictAddColorSpace (
|
|
pdfio_dict_t *dict,
|
|
const char *name,
|
|
pdfio_array_t *data
|
|
);
|
|
.fi
|
|
.PP
|
|
This function adds a named color space to the page dictionary.
|
|
.PP
|
|
The names "DefaultCMYK", "DefaultGray", and "DefaultRGB" specify the default
|
|
device color space used for the page.
|
|
.PP
|
|
The "data" array contains a calibrated, indexed, or ICC-based color space
|
|
array that was created using the
|
|
\fIpdfioArrayCreateCalibratedColorFromMatrix\fR,
|
|
\fIpdfioArrayCreateCalibratedColorFromPrimaries\fR,
|
|
\fIpdfioArrayCreateICCBasedColor\fR, or
|
|
\fIpdfioArrayCreateIndexedColor\fR functions.
|
|
.SS pdfioPageDictAddFont
|
|
Add a font object to the page dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioPageDictAddFont (
|
|
pdfio_dict_t *dict,
|
|
const char *name,
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioPageDictAddImage
|
|
Add an image object to the page dictionary.
|
|
.PP
|
|
.nf
|
|
bool pdfioPageDictAddImage (
|
|
pdfio_dict_t *dict,
|
|
const char *name,
|
|
pdfio_obj_t *obj
|
|
);
|
|
.fi
|
|
.SS pdfioStreamClose
|
|
Close a (data) stream in a PDF file.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamClose (
|
|
pdfio_stream_t *st
|
|
);
|
|
.fi
|
|
.SS pdfioStreamConsume
|
|
Consume bytes from the stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamConsume (
|
|
pdfio_stream_t *st,
|
|
size_t bytes
|
|
);
|
|
.fi
|
|
.SS pdfioStreamGetToken
|
|
Read a single PDF token from a stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamGetToken (
|
|
pdfio_stream_t *st,
|
|
char *buffer,
|
|
size_t bufsize
|
|
);
|
|
.fi
|
|
.SS pdfioStreamPeek
|
|
Peek at data in a stream.
|
|
.PP
|
|
.nf
|
|
ssize_t pdfioStreamPeek (
|
|
pdfio_stream_t *st,
|
|
void *buffer,
|
|
size_t bytes
|
|
);
|
|
.fi
|
|
.SS pdfioStreamPrintf
|
|
Write a formatted string to a stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamPrintf (
|
|
pdfio_stream_t *st,
|
|
const char *format,
|
|
...
|
|
);
|
|
.fi
|
|
.SS pdfioStreamPutChar
|
|
Write a single character to a stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamPutChar (
|
|
pdfio_stream_t *st,
|
|
int ch
|
|
);
|
|
.fi
|
|
.SS pdfioStreamPuts
|
|
Write a literal string to a stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamPuts (
|
|
pdfio_stream_t *st,
|
|
const char *s
|
|
);
|
|
.fi
|
|
.SS pdfioStreamRead
|
|
Read data from a stream.
|
|
.PP
|
|
.nf
|
|
ssize_t pdfioStreamRead (
|
|
pdfio_stream_t *st,
|
|
void *buffer,
|
|
size_t bytes
|
|
);
|
|
.fi
|
|
.PP
|
|
This function reads data from a stream. When reading decoded image data
|
|
from a stream, you \fImust\fR read whole scanlines. The
|
|
\fIpdfioImageGetBytesPerLine\fR function can be used to determine the
|
|
proper read length.
|
|
.SS pdfioStreamWrite
|
|
Write data to a stream.
|
|
.PP
|
|
.nf
|
|
bool pdfioStreamWrite (
|
|
pdfio_stream_t *st,
|
|
const void *buffer,
|
|
size_t bytes
|
|
);
|
|
.fi
|
|
.SS pdfioStringCreate
|
|
Create a durable literal string.
|
|
.PP
|
|
.nf
|
|
char * pdfioStringCreate (
|
|
pdfio_file_t *pdf,
|
|
const char *s
|
|
);
|
|
.fi
|
|
.PP
|
|
This function creates a literal string associated with the PDF file
|
|
"pdf". The "s" string points to a nul-terminated C string.
|
|
.PP
|
|
\fBNULL\fR is returned on error, otherwise a \fBchar *\fR that is valid until
|
|
\fBpdfioFileClose\fR is called.
|
|
.SS pdfioStringCreatef
|
|
Create a durable formatted string.
|
|
.PP
|
|
.nf
|
|
char * pdfioStringCreatef (
|
|
pdfio_file_t *pdf,
|
|
const char *format,
|
|
...
|
|
);
|
|
.fi
|
|
.PP
|
|
This function creates a formatted string associated with the PDF file
|
|
"pdf". The "format" string contains \fBprintf\fR-style format characters.
|
|
.PP
|
|
\fBNULL\fR is returned on error, otherwise a \fBchar *\fR that is valid until
|
|
\fBpdfioFileClose\fR is called.
|
|
.SS ttfCreate
|
|
Create a new font object for the named font family.
|
|
.PP
|
|
.nf
|
|
ttf_t * ttfCreate (
|
|
const char *filename,
|
|
size_t idx,
|
|
ttf_err_cb_t err_cb,
|
|
void *err_data
|
|
);
|
|
.fi
|
|
.SS ttfDelete
|
|
Free all memory used for a font family object.
|
|
.PP
|
|
.nf
|
|
void ttfDelete (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetAscent
|
|
Get the maximum height of non-accented characters.
|
|
.PP
|
|
.nf
|
|
int ttfGetAscent (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetBounds
|
|
Get the bounds of all characters in a font.
|
|
.PP
|
|
.nf
|
|
ttf_rect_t * ttfGetBounds (
|
|
ttf_t *font,
|
|
ttf_rect_t *bounds
|
|
);
|
|
.fi
|
|
.SS ttfGetCMap
|
|
Get the Unicode to glyph mapping table.
|
|
.PP
|
|
.nf
|
|
const int * ttfGetCMap (
|
|
ttf_t *font,
|
|
size_t *num_cmap
|
|
);
|
|
.fi
|
|
.SS ttfGetCapHeight
|
|
Get the height of capital letters.
|
|
.PP
|
|
.nf
|
|
int ttfGetCapHeight (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetCopyright
|
|
Get the copyright text for a font.
|
|
.PP
|
|
.nf
|
|
const char * ttfGetCopyright (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetDescent
|
|
Get the maximum depth of non-accented characters.
|
|
.PP
|
|
.nf
|
|
int ttfGetDescent (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetExtents
|
|
Get the extents of a UTF-8 string.
|
|
.PP
|
|
.nf
|
|
ttf_rect_t * ttfGetExtents (
|
|
ttf_t *font,
|
|
float size,
|
|
const char *s,
|
|
ttf_rect_t *extents
|
|
);
|
|
.fi
|
|
.PP
|
|
This function computes the extents of a UTF-8 string when rendered using the
|
|
specified font and size.
|
|
.SS ttfGetFamily
|
|
Get the family name of a font.
|
|
.PP
|
|
.nf
|
|
const char * ttfGetFamily (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetItalicAngle
|
|
Get the italic angle.
|
|
.PP
|
|
.nf
|
|
float ttfGetItalicAngle (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetMaxChar
|
|
Get the last character in the font.
|
|
.PP
|
|
.nf
|
|
int ttfGetMaxChar (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetMinChar
|
|
Get the first character in the font.
|
|
.PP
|
|
.nf
|
|
int ttfGetMinChar (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetNumFonts
|
|
Get the number of fonts in this collection.
|
|
.PP
|
|
.nf
|
|
size_t ttfGetNumFonts (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetPostScriptName
|
|
Get the PostScript name of a font.
|
|
.PP
|
|
.nf
|
|
const char * ttfGetPostScriptName (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetStretch
|
|
Get the font "stretch" value...
|
|
.PP
|
|
.nf
|
|
ttf_stretch_t ttfGetStretch (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetStyle
|
|
Get the font style.
|
|
.PP
|
|
.nf
|
|
ttf_style_t ttfGetStyle (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetVersion
|
|
Get the version number of a font.
|
|
.PP
|
|
.nf
|
|
const char * ttfGetVersion (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetWeight
|
|
Get the weight of a font.
|
|
.PP
|
|
.nf
|
|
ttf_weight_t ttfGetWeight (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfGetWidth
|
|
Get the width of a single character.
|
|
.PP
|
|
.nf
|
|
int ttfGetWidth (
|
|
ttf_t *font,
|
|
int ch
|
|
);
|
|
.fi
|
|
.SS ttfGetXHeight
|
|
Get the height of lowercase letters.
|
|
.PP
|
|
.nf
|
|
int ttfGetXHeight (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SS ttfIsFixedPitch
|
|
Determine whether a font is fixedpitch.
|
|
.PP
|
|
.nf
|
|
bool ttfIsFixedPitch (
|
|
ttf_t *font
|
|
);
|
|
.fi
|
|
.SH STRUCTURES
|
|
.SS pdfio_rect_s
|
|
PDF rectangle
|
|
.PP
|
|
.nf
|
|
struct pdfio_rect_s
|
|
{
|
|
double x1;
|
|
double x2;
|
|
double y1;
|
|
double y2;
|
|
};
|
|
.fi
|
|
.SH TYPES
|
|
.SS pdfio_array_t
|
|
Array of PDF values
|
|
.PP
|
|
.nf
|
|
typedef struct _pdfio_array_s pdfio_array_t;
|
|
.fi
|
|
.SS pdfio_dict_t
|
|
Key/value dictionary
|
|
.PP
|
|
.nf
|
|
typedef struct _pdfio_dict_s pdfio_dict_t;
|
|
.fi
|
|
.SS pdfio_error_cb_t
|
|
Error callback
|
|
.PP
|
|
.nf
|
|
typedef bool(*)(pdfio_file_t *pdf, const char *message, void *data) pdfio_error_cb_t;
|
|
.fi
|
|
.SS pdfio_file_t
|
|
PDF file
|
|
.PP
|
|
.nf
|
|
typedef struct _pdfio_file_s pdfio_file_t;
|
|
.fi
|
|
.SS pdfio_filter_t
|
|
Compression/decompression filters for streams
|
|
.PP
|
|
.nf
|
|
typedef enum pdfio_filter_e pdfio_filter_t;
|
|
.fi
|
|
.SS pdfio_obj_t
|
|
Numbered object in PDF file
|
|
.PP
|
|
.nf
|
|
typedef struct _pdfio_obj_s pdfio_obj_t;
|
|
.fi
|
|
.SS pdfio_rect_t
|
|
PDF rectangle
|
|
.PP
|
|
.nf
|
|
typedef struct pdfio_rect_s pdfio_rect_t;
|
|
.fi
|
|
.SS pdfio_stream_t
|
|
Object data stream in PDF file
|
|
.PP
|
|
.nf
|
|
typedef struct _pdfio_stream_s pdfio_stream_t;
|
|
.fi
|
|
.SS pdfio_valtype_t
|
|
PDF value types
|
|
.PP
|
|
.nf
|
|
typedef enum pdfio_valtype_e pdfio_valtype_t;
|
|
.fi
|
|
.SS ssize_t
|
|
POSIX type not present on Windows...
|
|
.PP
|
|
.nf
|
|
typedef __int64 ssize_t;
|
|
.fi
|
|
.SH AUTHOR
|
|
.PP
|
|
Michael R Sweet
|
|
.SH COPYRIGHT
|
|
.PP
|
|
Copyright (c) 2021 by Michael R Sweet
|