mirror of
https://github.com/michaelrsweet/pdfio.git
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API cleanup, more work on documentation.
This commit is contained in:
Michael R Sweet
440
doc/pdfio.3
440
doc/pdfio.3
@@ -1,4 +1,4 @@
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.TH pdfio 3 "pdf read/write library" "2021-05-30" "pdf read/write library"
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.TH pdfio 3 "pdf read/write library" "2021-06-07" "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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@@ -29,6 +29,191 @@ Provide access to objects used for each page
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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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|
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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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|
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.IP \(bu 5
|
||||
.PP
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CC: the C compiler (default "cc")
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|
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.IP \(bu 5
|
||||
.PP
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CFLAGS: options for the C compiler (default "")
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|
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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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||||
|
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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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|
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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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|
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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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|
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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
|
||||
.PP
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LDFLAGS: options for the C compiler when linking the test programs (default "")
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||||
|
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.IP \(bu 5
|
||||
.PP
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LIBS: library options when linking the test programs (default "\-lz")
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|
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.IP \(bu 5
|
||||
.PP
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RANLIB: program that generates a table\-of\-contents in a library (default "ranlib")
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||||
|
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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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Note: I haven't yet added this...
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.PP
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The Visual Studio solution ("pdfio.sln") is provided for Windows developers 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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||||
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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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||||
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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
|
||||
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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.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 content helper functions 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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||||
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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 PDF Files
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.SS PDF Values
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.SS PDF Objects
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.SS PDF Streams
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.SH ENUMERATIONS
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.SS pdfio_filter_e
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||||
@@ -139,7 +324,7 @@ Add a binary string value to an array.
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||||
.nf
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bool pdfioArrayAppendBinary (
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pdfio_array_t *a,
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unsigned char *value,
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||||
const unsigned char *value,
|
||||
size_t valuelen
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||||
);
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.fi
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||||
@@ -179,11 +364,11 @@ bool pdfioArrayAppendNumber (
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||||
double value
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||||
);
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||||
.fi
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.SS pdfioArrayAppendObject
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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 pdfioArrayAppendObject (
|
||||
bool pdfioArrayAppendObj (
|
||||
pdfio_array_t *a,
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||||
pdfio_obj_t *value
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||||
);
|
||||
@@ -214,6 +399,55 @@ pdfio_array_t * pdfioArrayCreate (
|
||||
pdfio_file_t *pdf
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||||
);
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||||
.fi
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.SS pdfioArrayCreateCalibratedColorFromMatrix
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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 * pdfioArrayCreateCalibratedColorFromMatrix (
|
||||
pdfio_file_t *pdf,
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||||
size_t num_colors,
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||||
double gamma,
|
||||
const double matrix[3][3],
|
||||
const double white_point[3]
|
||||
);
|
||||
.fi
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||||
.SS pdfioArrayCreateCalibratedColorFromPrimaries
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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 * pdfioArrayCreateCalibratedColorFromPrimaries (
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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,
|
||||
double wy,
|
||||
double rx,
|
||||
double ry,
|
||||
double gx,
|
||||
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 pdfioArrayCreateICCBasedColor
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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 * pdfioArrayCreateICCBasedColor (
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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 pdfioArrayCreateIndexedColor
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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 * pdfioArrayCreateIndexedColor (
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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 pdfioArrayGetArray
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Get an array value from an array.
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.PP
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||||
@@ -269,11 +503,11 @@ double pdfioArrayGetNumber (
|
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size_t n
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||||
);
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.fi
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.SS pdfioArrayGetObject
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.SS pdfioArrayGetObj
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Get an indirect object reference from an array.
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.PP
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||||
.nf
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||||
pdfio_obj_t * pdfioArrayGetObject (
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pdfio_obj_t * pdfioArrayGetObj (
|
||||
pdfio_array_t *a,
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||||
size_t n
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||||
);
|
||||
@@ -304,14 +538,6 @@ pdfio_valtype_t pdfioArrayGetType (
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||||
size_t n
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||||
);
|
||||
.fi
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||||
.SS pdfioContentBeginText
|
||||
Begin a text block.
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||||
.PP
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||||
.nf
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||||
bool pdfioContentBeginText (
|
||||
pdfio_stream_t *st
|
||||
);
|
||||
.fi
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||||
.SS pdfioContentClip
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||||
Clip output to the current path.
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||||
.PP
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||||
@@ -330,21 +556,13 @@ bool pdfioContentDrawImage (
|
||||
const char *name,
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||||
double x,
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||||
double y,
|
||||
double w,
|
||||
double h
|
||||
double width,
|
||||
double height
|
||||
);
|
||||
.fi
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||||
.PP
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||||
The object name must be part of the page dictionary resources, typically
|
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using the \fIpdfioPageDictAddImage\fR function.
|
||||
.SS pdfioContentEndText
|
||||
End a text block.
|
||||
.PP
|
||||
.nf
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||||
bool pdfioContentEndText (
|
||||
pdfio_stream_t *st
|
||||
);
|
||||
.fi
|
||||
.SS pdfioContentFill
|
||||
Fill the current path.
|
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.PP
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@@ -474,7 +692,10 @@ Add a rectangle to the current path.
|
||||
.nf
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||||
bool pdfioContentPathRect (
|
||||
pdfio_stream_t *st,
|
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pdfio_rect_t *rect
|
||||
double x,
|
||||
double y,
|
||||
double width,
|
||||
double height
|
||||
);
|
||||
.fi
|
||||
.SS pdfioContentRestore
|
||||
@@ -752,6 +973,22 @@ 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
|
||||
@@ -786,8 +1023,7 @@ Show text.
|
||||
.nf
|
||||
bool pdfioContentTextShow (
|
||||
pdfio_stream_t *st,
|
||||
const char *s,
|
||||
bool new_line
|
||||
const char *s
|
||||
);
|
||||
.fi
|
||||
.SS pdfioContentTextShowJustified
|
||||
@@ -801,6 +1037,16 @@ bool pdfioContentTextShowJustified (
|
||||
const char *const *fragments
|
||||
);
|
||||
.fi
|
||||
.SS pdfioContentTextShowf
|
||||
|
||||
.PP
|
||||
.nf
|
||||
bool pdfioContentTextShowf (
|
||||
pdfio_stream_t *st,
|
||||
const char *format,
|
||||
...
|
||||
);
|
||||
.fi
|
||||
.SS pdfioDictCopy
|
||||
Copy a dictionary to a PDF file.
|
||||
.PP
|
||||
@@ -873,11 +1119,11 @@ double pdfioDictGetNumber (
|
||||
const char *key
|
||||
);
|
||||
.fi
|
||||
.SS pdfioDictGetObject
|
||||
.SS pdfioDictGetObj
|
||||
Get a key indirect object value from a dictionary.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioDictGetObject (
|
||||
pdfio_obj_t * pdfioDictGetObj (
|
||||
pdfio_dict_t *dict,
|
||||
const char *key
|
||||
);
|
||||
@@ -927,7 +1173,7 @@ Set a key binary string in a dictionary.
|
||||
bool pdfioDictSetBinary (
|
||||
pdfio_dict_t *dict,
|
||||
const char *key,
|
||||
unsigned char *value,
|
||||
const unsigned char *value,
|
||||
size_t valuelen
|
||||
);
|
||||
.fi
|
||||
@@ -980,11 +1226,11 @@ bool pdfioDictSetNumber (
|
||||
double value
|
||||
);
|
||||
.fi
|
||||
.SS pdfioDictSetObject
|
||||
.SS pdfioDictSetObj
|
||||
Set a key indirect object reference in a dictionary.
|
||||
.PP
|
||||
.nf
|
||||
bool pdfioDictSetObject (
|
||||
bool pdfioDictSetObj (
|
||||
pdfio_dict_t *dict,
|
||||
const char *key,
|
||||
pdfio_obj_t *value
|
||||
@@ -1042,29 +1288,72 @@ pdfio_file_t * pdfioFileCreate (
|
||||
void *error_data
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileCreateFontObject
|
||||
.SS pdfioFileCreateBaseFontObj
|
||||
Create one of the base 14 PDF fonts.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileCreateBaseFontObj (
|
||||
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</li>
|
||||
</ul>
|
||||
.SS pdfioFileCreateFontObj
|
||||
Add a font object to a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileCreateFontObject (
|
||||
pdfio_obj_t * pdfioFileCreateFontObj (
|
||||
pdfio_file_t *pdf,
|
||||
const char *filename
|
||||
const char *filename,
|
||||
bool unicode
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileCreateICCProfileObject
|
||||
.SS pdfioFileCreateICCProfileObj
|
||||
Add an ICC profile object to a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileCreateICCProfileObject (
|
||||
pdfio_obj_t * pdfioFileCreateICCProfileObj (
|
||||
pdfio_file_t *pdf,
|
||||
const char *filename
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileCreateImageObject
|
||||
.SS pdfioFileCreateImageObj
|
||||
Add an image object to a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileCreateImageObject (
|
||||
pdfio_obj_t * pdfioFileCreateImageObj (
|
||||
pdfio_file_t *pdf,
|
||||
const char *filename,
|
||||
bool interpolate
|
||||
@@ -1072,11 +1361,11 @@ pdfio_obj_t * pdfioFileCreateImageObject (
|
||||
.fi
|
||||
.PP
|
||||
Currently only GIF, JPEG, and PNG files are supported.
|
||||
.SS pdfioFileCreateObject
|
||||
.SS pdfioFileCreateObj
|
||||
Create a new object in a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileCreateObject (
|
||||
pdfio_obj_t * pdfioFileCreateObj (
|
||||
pdfio_file_t *pdf,
|
||||
pdfio_dict_t *dict
|
||||
);
|
||||
@@ -1090,17 +1379,17 @@ pdfio_stream_t * pdfioFileCreatePage (
|
||||
pdfio_dict_t *dict
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileFindObject
|
||||
.SS pdfioFileFindObj
|
||||
Find an object using its object number.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileFindObject (
|
||||
pdfio_obj_t * pdfioFileFindObj (
|
||||
pdfio_file_t *pdf,
|
||||
size_t number
|
||||
);
|
||||
.fi
|
||||
.PP
|
||||
This differs from \fIpdfioFileGetObject\fR which takes an index into the
|
||||
This differs from \fIpdfioFileGetObj\fR which takes an index into the
|
||||
list of objects while this function takes the object number.
|
||||
.SS pdfioFileGetID
|
||||
Get the PDF file's ID strings.
|
||||
@@ -1118,11 +1407,11 @@ const char * pdfioFileGetName (
|
||||
pdfio_file_t *pdf
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileGetNumObjects
|
||||
.SS pdfioFileGetNumObjs
|
||||
Get the number of objects in a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
size_t pdfioFileGetNumObjects (
|
||||
size_t pdfioFileGetNumObjs (
|
||||
pdfio_file_t *pdf
|
||||
);
|
||||
.fi
|
||||
@@ -1134,11 +1423,11 @@ size_t pdfioFileGetNumPages (
|
||||
pdfio_file_t *pdf
|
||||
);
|
||||
.fi
|
||||
.SS pdfioFileGetObject
|
||||
.SS pdfioFileGetObj
|
||||
Get an object from a PDF file.
|
||||
.PP
|
||||
.nf
|
||||
pdfio_obj_t * pdfioFileGetObject (
|
||||
pdfio_obj_t * pdfioFileGetObj (
|
||||
pdfio_file_t *pdf,
|
||||
size_t n
|
||||
);
|
||||
@@ -1170,6 +1459,14 @@ pdfio_file_t * pdfioFileOpen (
|
||||
void *error_data
|
||||
);
|
||||
.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
|
||||
@@ -1253,6 +1550,14 @@ 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
|
||||
@@ -1279,19 +1584,28 @@ bool pdfioPageCopy (
|
||||
pdfio_obj_t *srcpage
|
||||
);
|
||||
.fi
|
||||
.SS pdfioPageDictAddCalibratedColorSpace
|
||||
Add a calibrated color space to
|
||||
the page dictionary.
|
||||
.SS pdfioPageDictAddColorSpace
|
||||
Add a color space to the page dictionary.
|
||||
.PP
|
||||
.nf
|
||||
bool pdfioPageDictAddCalibratedColorSpace (
|
||||
bool pdfioPageDictAddColorSpace (
|
||||
pdfio_dict_t *dict,
|
||||
const char *name,
|
||||
size_t num_colors,
|
||||
const double *white_point,
|
||||
double gamma
|
||||
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
|
||||
@@ -1302,17 +1616,6 @@ bool pdfioPageDictAddFont (
|
||||
pdfio_obj_t *obj
|
||||
);
|
||||
.fi
|
||||
.SS pdfioPageDictAddICCColorSpace
|
||||
Add an ICC color space to the page
|
||||
dictionary.
|
||||
.PP
|
||||
.nf
|
||||
bool pdfioPageDictAddICCColorSpace (
|
||||
pdfio_dict_t *dict,
|
||||
const char *name,
|
||||
pdfio_obj_t *obj
|
||||
);
|
||||
.fi
|
||||
.SS pdfioPageDictAddImage
|
||||
Add an image object to the page dictionary.
|
||||
.PP
|
||||
@@ -1389,6 +1692,11 @@ ssize_t pdfioStreamRead (
|
||||
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
|
||||
|
||||
Reference in New Issue
Block a user