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Update docos.
This commit is contained in:
Michael R Sweet
parent
7473bc3cd9
commit
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@ -102,8 +102,8 @@ 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 both a static library and DLL. You can also use NuGet to install the
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`pdfio_native` package.
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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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84
doc/pdfio.3
84
doc/pdfio.3
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@ -1,4 +1,4 @@
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.TH pdfio 3 "pdf read/write library" "2021-08-30" "pdf read/write library"
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.TH pdfio 3 "pdf read/write library" "2021-09-27" "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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@ -171,7 +171,7 @@ In a makefile you can add the necessary compiler and linker options with:
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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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On Windows, you need to link to the PDFIO1.LIB (DLL) library and include the zlib_native NuGet package dependency. You can also use the published pdfio_native NuGet package.
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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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@ -270,6 +270,15 @@ You create a new PDF file using the pdfioFileCreate function:
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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). The units for the media and crop boxes are points (1/72nd of an inch).
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.PP
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Alternately you can stream a PDF file using the pdfioFileCreateOutput 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 }; // w/0.5" margins
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pdfio_file_t *pdf = pdfioFileCreateOutput(output_cb, output_ctx, "2.0", &media_box, &crop_box, error_cb, error_data);
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.fi
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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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@ -1995,6 +2004,20 @@ pdfio_file_t * pdfioFileCreate (
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void *error_data
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);
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.fi
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.PP
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This function creates a new PDF file. The "filename" argument specifies the
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name of the PDF file to create.
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.PP
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The "version" argument specifies the PDF version number for the file or
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\fBNULL\fR for the default ("2.0").
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.PP
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The "media_box" and "crop_box" arguments specify the default MediaBox and
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CropBox for pages in the PDF file - if \fBNULL\fR then a default "Universal" size
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of 8.27x11in (the intersection of US Letter and ISO A4) is used.
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.PP
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The "error_cb" and "error_data" arguments specify an error handler callback
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and its data pointer - if not specified the default error handler is used
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that writes error messages to \fBstderr\fR.
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.SS pdfioFileCreateArrayObj
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Create a new object in a PDF file containing an array.
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.PP
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@ -2137,6 +2160,51 @@ pdfio_obj_t * pdfioFileCreateObj (
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pdfio_dict_t *dict
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);
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.fi
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.SS pdfioFileCreateOutput
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Create a PDF file through an output callback.
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.PP
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.nf
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pdfio_file_t * pdfioFileCreateOutput (
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pdfio_output_cb_t output_cb,
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void *output_ctx,
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const char *version,
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pdfio_rect_t *media_box,
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pdfio_rect_t *crop_box,
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pdfio_error_cb_t error_cb,
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void *error_data
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);
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.fi
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.PP
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This function creates a new PDF file that is streamed though an output
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callback. The "output_cb" and "output_ctx" arguments specify the output
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callback and its context pointer which is called whenever data needs to be
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written:
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.PP
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.nf
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ssize_t
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output_cb(void *output_ctx, const void *buffer, size_t bytes)
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{
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// Write buffer to output and return the number of bytes written
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}
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.fi
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The "version" argument specifies the PDF version number for the file or
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\fBNULL\fR for the default ("2.0").
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.PP
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The "media_box" and "crop_box" arguments specify the default MediaBox and
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CropBox for pages in the PDF file - if \fBNULL\fR then a default "Universal" size
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of 8.27x11in (the intersection of US Letter and ISO A4) is used.
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.PP
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The "error_cb" and "error_data" arguments specify an error handler callback
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and its data pointer - if not specified the default error handler is used
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that writes error messages to \fBstderr\fR.
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.PP
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.IP 5
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\fINote\fR: Files created using this API are slightly larger than those
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.IP 5
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created using the \fIpdfioFileCreate\fR function since stream lengths are
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.IP 5
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stored as indirect object references.
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.SS pdfioFileCreatePage
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Create a page in a PDF file.
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.PP
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@ -2282,6 +2350,12 @@ pdfio_file_t * pdfioFileOpen (
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void *error_data
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);
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.fi
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.PP
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This function opens an existing PDF file. The "filename" argument specifies
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the name of the PDF file to create. The "error_cb" and "error_data"
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arguments specify an error handler callback and its data pointer - if not
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specified the default error handler is used that writes error messages to
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\fBstderr\fR.
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.SS pdfioFileSetAuthor
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Set the author for a PDF file.
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.PP
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@ -2698,6 +2772,12 @@ Numbered object in PDF file
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.nf
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typedef struct _pdfio_obj_s pdfio_obj_t;
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.fi
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.SS pdfio_output_cb_t
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Output callback for pdfioFileCreateOutput
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.PP
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.nf
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typedef ssize_t(*)(void *ctx const void *data size_t datalen) pdfio_output_cb_t;
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.fi
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.SS pdfio_rect_t
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PDF rectangle
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.PP
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@ -1,13 +1,13 @@
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<!DOCTYPE html>
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<html lang="en-US">
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<head>
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<title>PDFio Programming Manual v1.0b1</title>
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<title>PDFio Programming Manual v1.0.0</title>
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<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
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<meta name="generator" content="codedoc v3.7">
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<meta name="author" content="Michael R Sweet">
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<meta name="language" content="en-US">
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<meta name="copyright" content="Copyright © 2021 by Michael R Sweet">
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<meta name="version" content="1.0b1">
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<meta name="version" content="1.0.0">
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<style type="text/css"><!--
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body {
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background: white;
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@ -245,7 +245,7 @@ span.string {
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<body>
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<div class="header">
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<p><img class="title" src="pdfio-512.png"></p>
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<h1 class="title">PDFio Programming Manual v1.0b1</h1>
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<h1 class="title">PDFio Programming Manual v1.0.0</h1>
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<p>Michael R Sweet</p>
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<p>Copyright © 2021 by Michael R Sweet</p>
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</div>
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@ -381,6 +381,7 @@ span.string {
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<li><a href="#pdfioFileCreateImageObjFromData">pdfioFileCreateImageObjFromData</a></li>
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<li><a href="#pdfioFileCreateImageObjFromFile">pdfioFileCreateImageObjFromFile</a></li>
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<li><a href="#pdfioFileCreateObj">pdfioFileCreateObj</a></li>
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<li><a href="#pdfioFileCreateOutput">pdfioFileCreateOutput</a></li>
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<li><a href="#pdfioFileCreatePage">pdfioFileCreatePage</a></li>
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<li><a href="#pdfioFileFindObj">pdfioFileFindObj</a></li>
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<li><a href="#pdfioFileGetAuthor">pdfioFileGetAuthor</a></li>
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@ -445,6 +446,7 @@ span.string {
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<li><a href="#pdfio_linejoin_t">pdfio_linejoin_t</a></li>
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<li><a href="#pdfio_matrix_t[3][2]">pdfio_matrix_t[3][2]</a></li>
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<li><a href="#pdfio_obj_t">pdfio_obj_t</a></li>
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<li><a href="#pdfio_output_cb_t">pdfio_output_cb_t</a></li>
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<li><a href="#pdfio_rect_t">pdfio_rect_t</a></li>
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<li><a href="#pdfio_stream_t">pdfio_stream_t</a></li>
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<li><a href="#pdfio_textrendering_t">pdfio_textrendering_t</a></li>
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@ -557,7 +559,7 @@ fi
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<pre><code class="language-make">CFLAGS += `pkg-config --cflags pdfio`
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LIBS += `pkg-config --libs pdfio`
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</code></pre>
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<p>On Windows, you need to link to the <code>PDFIO.LIB</code> (static) or <code>PDFIO1.LIB</code> (DLL) libraries and include the "zlib" NuGet package dependency.</p>
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<p>On Windows, you need to link to the <code>PDFIO1.LIB</code> (DLL) library and include the <code>zlib_native</code> NuGet package dependency. You can also use the published <code>pdfio_native</code> NuGet package.</p>
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<h3 class="title" id="header-files">Header Files</h3>
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<p>PDFio provides a primary header file that is always used:</p>
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<pre><code class="language-c"><span class="directive">#include <pdfio.h></span>
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@ -621,6 +623,12 @@ pdfio_rect_t crop_box = { <span class="number">36.0</span>, <span class="number"
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pdfio_file_t *pdf = pdfioFileCreate(<span class="string">"myoutputfile.pdf"</span>, <span class="string">"2.0"</span>, &media_box, &crop_box, error_cb, error_data);
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</code></pre>
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<p>where the six arguments to the function are the filename ("myoutputfile.pdf"), PDF version ("2.0"), media box (<code>media_box</code>), crop box (<code>crop_box</code>), an optional error callback function (<code>error_cb</code>), and an optional pointer value for the error callback function (<code>error_data</code>). The units for the media and crop boxes are points (1/72nd of an inch).</p>
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<p>Alternately you can stream a PDF file using the <a href="#pdfioFileCreateOutput"><code>pdfioFileCreateOutput</code></a> function:</p>
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<pre><code class="language-c">pdfio_rect_t media_box = { <span class="number">0.0</span>, <span class="number">0.0</span>, <span class="number">612.0</span>, <span class="number">792.0</span> }; <span class="comment">// US Letter</span>
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pdfio_rect_t crop_box = { <span class="number">36.0</span>, <span class="number">36.0</span>, <span class="number">576.0</span>, <span class="number">756.0</span> }; <span class="comment">// w/0.5" margins</span>
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pdfio_file_t *pdf = pdfioFileCreateOutput(output_cb, output_ctx, <span class="string">"2.0"</span>, &media_box, &crop_box, error_cb, error_data);
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</code></pre>
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<p>Once the file is created, use the <a href="#pdfioFileCreateObj"><code>pdfioFileCreateObj</code></a>, <a href="#pdfioFileCreatePage"><code>pdfioFileCreatePage</code></a>, and <a href="#pdfioPageCopy"><code>pdfioPageCopy</code></a> functions to create objects and pages in the file.</p>
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<p>Finally, the <a href="#pdfioFileClose"><code>pdfioFileClose</code></a> function writes the PDF cross-reference and "trailer" information, closes the file, and frees all memory that was used for it.</p>
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<h3 class="title" id="pdf-objects">PDF Objects</h3>
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@ -2444,6 +2452,20 @@ bool pdfioFileClose(<a href="#pdfio_file_t">pdfio_file_t</a> *pdf);</p>
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</tbody></table>
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<h4 class="returnvalue">Return Value</h4>
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<p class="description">PDF file or <code>NULL</code> on error</p>
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<h4 class="discussion">Discussion</h4>
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<p class="discussion">This function creates a new PDF file. The "filename" argument specifies the
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name of the PDF file to create.<br>
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<br>
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The "version" argument specifies the PDF version number for the file or
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<code>NULL</code> for the default ("2.0").<br>
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<br>
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The "media_box" and "crop_box" arguments specify the default MediaBox and
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CropBox for pages in the PDF file - if <code>NULL</code> then a default "Universal" size
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of 8.27x11in (the intersection of US Letter and ISO A4) is used.<br>
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<br>
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The "error_cb" and "error_data" arguments specify an error handler callback
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and its data pointer - if not specified the default error handler is used
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that writes error messages to <code>stderr</code>.</p>
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<h3 class="function"><a id="pdfioFileCreateArrayObj">pdfioFileCreateArrayObj</a></h3>
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<p class="description">Create a new object in a PDF file containing an array.</p>
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<p class="code">
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@ -2621,6 +2643,57 @@ is supported.</blockquote>
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</tbody></table>
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<h4 class="returnvalue">Return Value</h4>
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<p class="description">New object</p>
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<h3 class="function"><a id="pdfioFileCreateOutput">pdfioFileCreateOutput</a></h3>
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<p class="description">Create a PDF file through an output callback.</p>
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<p class="code">
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<a href="#pdfio_file_t">pdfio_file_t</a> *pdfioFileCreateOutput(<a href="#pdfio_output_cb_t">pdfio_output_cb_t</a> output_cb, void *output_ctx, const char *version, <a href="#pdfio_rect_t">pdfio_rect_t</a> *media_box, <a href="#pdfio_rect_t">pdfio_rect_t</a> *crop_box, <a href="#pdfio_error_cb_t">pdfio_error_cb_t</a> error_cb, void *error_data);</p>
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<h4 class="parameters">Parameters</h4>
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<table class="list"><tbody>
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<tr><th>output_cb</th>
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<td class="description">Output callback</td></tr>
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<tr><th>output_ctx</th>
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<td class="description">Output context</td></tr>
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<tr><th>version</th>
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<td class="description">PDF version number or <code>NULL</code> for default (2.0)</td></tr>
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<tr><th>media_box</th>
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<td class="description">Default MediaBox for pages</td></tr>
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<tr><th>crop_box</th>
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<td class="description">Default CropBox for pages</td></tr>
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<tr><th>error_cb</th>
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<td class="description">Error callback or <code>NULL</code> for default</td></tr>
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<tr><th>error_data</th>
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<td class="description">Error callback data, if any</td></tr>
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</tbody></table>
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<h4 class="returnvalue">Return Value</h4>
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<p class="description">PDF file or <code>NULL</code> on error</p>
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<h4 class="discussion">Discussion</h4>
|
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<p class="discussion">This function creates a new PDF file that is streamed though an output
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callback. The "output_cb" and "output_ctx" arguments specify the output
|
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callback and its context pointer which is called whenever data needs to be
|
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written:
|
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<pre>
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ssize_t
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output_cb(void *output_ctx, const void *buffer, size_t bytes)
|
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{
|
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// Write buffer to output and return the number of bytes written
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}
|
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</pre>
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The "version" argument specifies the PDF version number for the file or
|
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<code>NULL</code> for the default ("2.0").<br>
|
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<br>
|
||||
The "media_box" and "crop_box" arguments specify the default MediaBox and
|
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CropBox for pages in the PDF file - if <code>NULL</code> then a default "Universal" size
|
||||
of 8.27x11in (the intersection of US Letter and ISO A4) is used.<br>
|
||||
<br>
|
||||
The "error_cb" and "error_data" arguments specify an error handler callback
|
||||
and its data pointer - if not specified the default error handler is used
|
||||
that writes error messages to <code>stderr</code>.<br>
|
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<br>
|
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</p><blockquote>
|
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<em>Note</em>: Files created using this API are slightly larger than those
|
||||
created using the <a href="#pdfioFileCreate"><code>pdfioFileCreate</code></a> function since stream lengths are
|
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stored as indirect object references.</blockquote>
|
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<h3 class="function"><a id="pdfioFileCreatePage">pdfioFileCreatePage</a></h3>
|
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<p class="description">Create a page in a PDF file.</p>
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<p class="code">
|
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|
|
@ -2823,6 +2896,12 @@ const char *pdfioFileGetVersion(<a href="#pdfio_file_t">pdfio_file_t</a> *pdf);<
|
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</tbody></table>
|
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<h4 class="returnvalue">Return Value</h4>
|
||||
<p class="description">PDF file</p>
|
||||
<h4 class="discussion">Discussion</h4>
|
||||
<p class="discussion">This function opens an existing PDF file. The "filename" argument specifies
|
||||
the name of the PDF file to create. The "error_cb" and "error_data"
|
||||
arguments specify an error handler callback and its data pointer - if not
|
||||
specified the default error handler is used that writes error messages to
|
||||
<code>stderr</code>.</p>
|
||||
<h3 class="function"><a id="pdfioFileSetAuthor">pdfioFileSetAuthor</a></h3>
|
||||
<p class="description">Set the author for a PDF file.</p>
|
||||
<p class="code">
|
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|
|
@ -3341,6 +3420,11 @@ typedef double pdfio_matrix_t[3][2];
|
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<p class="code">
|
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typedef struct _pdfio_obj_s pdfio_obj_t;
|
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</p>
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<h3 class="typedef"><a id="pdfio_output_cb_t">pdfio_output_cb_t</a></h3>
|
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<p class="description">Output callback for pdfioFileCreateOutput</p>
|
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<p class="code">
|
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typedef ssize_t (*pdfio_output_cb_t)(void *ctx const void *data size_t datalen);
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</p>
|
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<h3 class="typedef"><a id="pdfio_rect_t">pdfio_rect_t</a></h3>
|
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<p class="description">PDF rectangle</p>
|
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<p class="code">
|
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|
|
|
|||
15
doc/pdfio.md
15
doc/pdfio.md
|
|
@ -122,8 +122,9 @@ CFLAGS += `pkg-config --cflags pdfio`
|
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LIBS += `pkg-config --libs pdfio`
|
||||
```
|
||||
|
||||
On Windows, you need to link to the `PDFIO.LIB` (static) or `PDFIO1.LIB` (DLL)
|
||||
libraries and include the "zlib" NuGet package dependency.
|
||||
On Windows, you need to link to the `PDFIO1.LIB` (DLL) library and include the
|
||||
`zlib_native` NuGet package dependency. You can also use the published
|
||||
`pdfio_native` NuGet package.
|
||||
|
||||
|
||||
Header Files
|
||||
|
|
@ -235,6 +236,16 @@ error callback function (`error_cb`), and an optional pointer value for the
|
|||
error callback function (`error_data`). The units for the media and crop boxes
|
||||
are points (1/72nd of an inch).
|
||||
|
||||
Alternately you can stream a PDF file using the [`pdfioFileCreateOutput`](@@)
|
||||
function:
|
||||
|
||||
```c
|
||||
pdfio_rect_t media_box = { 0.0, 0.0, 612.0, 792.0 }; // US Letter
|
||||
pdfio_rect_t crop_box = { 36.0, 36.0, 576.0, 756.0 }; // w/0.5" margins
|
||||
|
||||
pdfio_file_t *pdf = pdfioFileCreateOutput(output_cb, output_ctx, "2.0", &media_box, &crop_box, error_cb, error_data);
|
||||
```
|
||||
|
||||
Once the file is created, use the [`pdfioFileCreateObj`](@@),
|
||||
[`pdfioFileCreatePage`](@@), and [`pdfioPageCopy`](@@) functions to create
|
||||
objects and pages in the file.
|
||||
|
|
|
|||
48
pdfio-file.c
48
pdfio-file.c
|
|
@ -166,6 +166,20 @@ pdfioFileClose(pdfio_file_t *pdf) // I - PDF file
|
|||
//
|
||||
// 'pdfioFileCreate()' - Create a PDF file.
|
||||
//
|
||||
// This function creates a new PDF file. The "filename" argument specifies the
|
||||
// name of the PDF file to create.
|
||||
//
|
||||
// The "version" argument specifies the PDF version number for the file or
|
||||
// `NULL` for the default ("2.0").
|
||||
//
|
||||
// The "media_box" and "crop_box" arguments specify the default MediaBox and
|
||||
// CropBox for pages in the PDF file - if `NULL` then a default "Universal" size
|
||||
// of 8.27x11in (the intersection of US Letter and ISO A4) is used.
|
||||
//
|
||||
// The "error_cb" and "error_data" arguments specify an error handler callback
|
||||
// and its data pointer - if not specified the default error handler is used
|
||||
// that writes error messages to `stderr`.
|
||||
//
|
||||
|
||||
pdfio_file_t * // O - PDF file or `NULL` on error
|
||||
pdfioFileCreate(
|
||||
|
|
@ -402,6 +416,34 @@ _pdfioFileCreateObj(
|
|||
//
|
||||
// 'pdfioFileCreateOutput()' - Create a PDF file through an output callback.
|
||||
//
|
||||
// This function creates a new PDF file that is streamed though an output
|
||||
// callback. The "output_cb" and "output_ctx" arguments specify the output
|
||||
// callback and its context pointer which is called whenever data needs to be
|
||||
// written:
|
||||
//
|
||||
// ```
|
||||
// ssize_t
|
||||
// output_cb(void *output_ctx, const void *buffer, size_t bytes)
|
||||
// {
|
||||
// // Write buffer to output and return the number of bytes written
|
||||
// }
|
||||
// ```
|
||||
//
|
||||
// The "version" argument specifies the PDF version number for the file or
|
||||
// `NULL` for the default ("2.0").
|
||||
//
|
||||
// The "media_box" and "crop_box" arguments specify the default MediaBox and
|
||||
// CropBox for pages in the PDF file - if `NULL` then a default "Universal" size
|
||||
// of 8.27x11in (the intersection of US Letter and ISO A4) is used.
|
||||
//
|
||||
// The "error_cb" and "error_data" arguments specify an error handler callback
|
||||
// and its data pointer - if not specified the default error handler is used
|
||||
// that writes error messages to `stderr`.
|
||||
//
|
||||
// > *Note*: Files created using this API are slightly larger than those
|
||||
// > created using the @link pdfioFileCreate@ function since stream lengths are
|
||||
// > stored as indirect object references.
|
||||
//
|
||||
|
||||
pdfio_file_t * // O - PDF file or `NULL` on error
|
||||
pdfioFileCreateOutput(
|
||||
|
|
@ -820,6 +862,12 @@ pdfioFileGetVersion(
|
|||
//
|
||||
// 'pdfioFileOpen()' - Open a PDF file for reading.
|
||||
//
|
||||
// This function opens an existing PDF file. The "filename" argument specifies
|
||||
// the name of the PDF file to create. The "error_cb" and "error_data"
|
||||
// arguments specify an error handler callback and its data pointer - if not
|
||||
// specified the default error handler is used that writes error messages to
|
||||
// `stderr`.
|
||||
//
|
||||
|
||||
pdfio_file_t * // O - PDF file
|
||||
pdfioFileOpen(
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user