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130 lines
4.4 KiB
Markdown
130 lines
4.4 KiB
Markdown
pdfio - PDF Read/Write Library
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==============================
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[](https://scan.coverity.com/projects/michaelrsweet-pdfio)
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[](https://lgtm.com/projects/g/michaelrsweet/pdfio/context:cpp)
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[](https://lgtm.com/projects/g/michaelrsweet/pdfio/)
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PDFio is a simple C library for reading and writing PDF files. The primary
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goals of PDFio are:
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- Read and write any version of PDF file
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- Provide access to pages, objects, and streams within a PDF file
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- Support reading encrypted PDF files
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- Support writing PDF files with digital signatures
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- Extract or embed useful metadata (author, creator, page information, etc.)
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- "Filter" PDF files, for example to extract a range of pages or to embed fonts
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that are missing from a PDF
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- Provide access to objects used for each page
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PDFio is *not* concerned with rendering or viewing a PDF file, although a PDF
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RIP or viewer could be written using it.
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Requirements
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------------
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PDFio requires the following to build the software:
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- A C99 compiler such as Clang, GCC, or MS Visual C
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- A POSIX-compliant `make` program
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- ZLIB (<https://www.zlib.net>) 1.0 or higher
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IDE files for Xcode (macOS/iOS) and Visual Studio (Windows) are also provided.
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Documentation
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-------------
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See the man page (`pdfio.3`), frequently ask questions (`FAQ.md`), and full HTML
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documentation (`pdfio.html`) for information on using PDFio.
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Installing pdfio
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----------------
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PDFio comes with a portable makefile that will work on any POSIX-compliant
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system with ZLIB installed. To make it, run:
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make all
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To test it, run:
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make test
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To install it, run:
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make install
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If you want a shared library, run:
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make all-shared
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make install-shared
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The default installation location is "/usr/local". Pass the `prefix` variable
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to make to install it to another location:
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make install prefix=/some/other/directory
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The makefile installs the pdfio header to "${prefix}/include", the library to
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"${prefix}/lib", the `pkg-config` file to "${prefix}/lib/pkgconfig", the man
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page to "${prefix}/share/man/man3", and the documentation to
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"${prefix}/share/doc/pdfio".
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The makefile supports the following variables that can be specified in the make
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command or as environment variables:
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- `AR`: the library archiver (default "ar")
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- `ARFLAGS`: options for the library archiver (default "cr")
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- `CC`: the C compiler (default "cc")
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- `CFLAGS`: options for the C compiler (default "")
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- `CODESIGN_IDENTITY`: the identity to use when code signing the shared library
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on macOS (default "Developer ID")
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- `COMMONFLAGS`: options for the C compiler and linker (typically architecture
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and optimization options, default is "-Os -g")
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- `CPPFLAGS`: options for the C preprocessor (default "")
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- `DESTDIR` and `DSTROOT`: specifies a root directory when installing
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(default is "", specify only one)
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- `DSOFLAGS`: options for the C compiler when linking the shared library
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(default "")
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- `LDFLAGS`: options for the C compiler when linking the test programs
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(default "")
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- `LIBS`: library options when linking the test programs (default "-lz")
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- `RANLIB`: program that generates a table-of-contents in a library
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(default "ranlib")
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- `prefix`: specifies the installation directory (default "/usr/local")
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Visual Studio Project
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---------------------
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The Visual Studio solution ("pdfio.sln") is provided for Windows developers and
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generates the PDFIO1 DLL. You can also use NuGet to install the `pdfio_native`
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package.
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Xcode Project
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-------------
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There is also an Xcode project ("pdfio.xcodeproj") you can use on macOS which
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generates a static library that will be installed under "/usr/local" with:
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sudo xcodebuild install
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You can reproduce this with the makefile using:
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sudo make COMMONFLAGS="-Os -mmacosx-version-min=10.14 -arch x86_64 -arch arm64" install
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Legal Stuff
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-----------
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PDFio is Copyright © 2021 by Michael R Sweet.
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This software is licensed under the Apache License Version 2.0 with an
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(optional) exception to allow linking against GPL2/LGPL2 software. See the
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files "LICENSE" and "NOTICE" for more information.
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