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Update pdfioContentSetDashPattern to support setting solid line styles (Issue #41)

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Michael R Sweet 2023-10-06 15:47:27 -04:00
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5 changed files with 52 additions and 18 deletions
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2
CHANGES.md
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@ -5,6 +5,8 @@ Changes in PDFio
v1.1.2 (TBD)
------------
- Updated `pdfioContentSetDashPattern` to support setting a solid (0 length)
dash pattern (Issue #41)
- Fixed an issue with broken PDF files containing extra CR and/or LF separators
after the object stream token (Issue #40)
- Fixed an issue with PDF files produced by Microsoft Reporting Services

24
doc/pdfio.3
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@ -1,4 +1,4 @@
.TH pdfio 3 "pdf read/write library" "2022-07-03" "pdf read/write library"
.TH pdfio 3 "pdf read/write library" "2023-10-06" "pdf read/write library"
.SH NAME
pdfio \- pdf read/write library
.SH Introduction
@ -34,7 +34,7 @@ PDFio is
.I not
concerned with rendering or viewing a PDF file, although a PDF RIP or viewer could be written using it.
.PP
PDFio is Copyright \[co] 2021\-2022 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.
PDFio is Copyright \[co] 2021\-2023 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.
.SS Requirements
.PP
PDFio requires the following to build the software:
@ -1357,7 +1357,7 @@ bool pdfioContentFillAndStroke (
.fi
.SS pdfioContentMatrixConcat
Concatenate a matrix to the current graphics
state.
state.
.PP
.nf
bool pdfioContentMatrixConcat (
@ -1507,6 +1507,9 @@ bool pdfioContentSetDashPattern (
double off
);
.fi
.PP
This function sets the stroke pattern when drawing lines. If "on" and "off"
are 0, a solid line is drawn.
.SS pdfioContentSetFillColorDeviceCMYK
Set device CMYK fill color.
.PP
@ -1981,6 +1984,7 @@ function "cb":
}
.fi
The iteration continues as long as the callback returns \fBtrue\fR or all keys
have been iterated.
.SS pdfioDictSetArray
@ -2305,10 +2309,11 @@ 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
// Write buffer to output and return the number of bytes written
}
.fi
The "version" argument specifies the PDF version number for the file or
\fBNULL\fR for the default ("2.0").
.PP
@ -2616,7 +2621,7 @@ double pdfioImageGetWidth (
.fi
.SS pdfioObjClose
Close an object, writing any data as needed to the PDF
file.
file.
.PP
.nf
bool pdfioObjClose (
@ -2802,6 +2807,13 @@ bool pdfioStreamGetToken (
size_t bufsize
);
.fi
.PP
This function reads a single PDF token from a stream. Operator tokens,
boolean values, and numbers are returned as-is in the provided string buffer.
String values start with the opening parenthesis ('(') but have all escaping
resolved and the terminating parenthesis removed. Hexadecimal string values
start with the opening angle bracket ('<') and have all whitespace and the
terminating angle bracket removed.
.SS pdfioStreamPeek
Peek at data in a stream.
.PP
@ -3035,4 +3047,4 @@ typedef uint8_t state_t[4][4];
Michael R Sweet
.SH COPYRIGHT
.PP
Copyright (c) 2021-2022 by Michael R Sweet
Copyright (c) 2021-2023 by Michael R Sweet

30
doc/pdfio.html
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@ -1,13 +1,13 @@
<!DOCTYPE html>
<html lang="en-US">
<head>
<title>PDFio Programming Manual v1.1</title>
<title>PDFio Programming Manual v1.1.2</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<meta name="generator" content="codedoc v3.7">
<meta name="author" content="Michael R Sweet">
<meta name="language" content="en-US">
<meta name="copyright" content="Copyright © 2021-2022 by Michael R Sweet">
<meta name="version" content="1.1">
<meta name="copyright" content="Copyright © 2021-2023 by Michael R Sweet">
<meta name="version" content="1.1.2">
<style type="text/css"><!--
body {
background: white;
@ -245,9 +245,9 @@ span.string {
<body>
<div class="header">
<p><img class="title" src="pdfio-512.png"></p>
<h1 class="title">PDFio Programming Manual v1.1</h1>
<h1 class="title">PDFio Programming Manual v1.1.2</h1>
<p>Michael R Sweet</p>
<p>Copyright © 2021-2022 by Michael R Sweet</p>
<p>Copyright © 2021-2023 by Michael R Sweet</p>
</div>
<div class="contents">
<h2 class="title">Contents</h2>
@ -497,7 +497,7 @@ span.string {
</li>
</ul>
<p>PDFio is <em>not</em> concerned with rendering or viewing a PDF file, although a PDF RIP or viewer could be written using it.</p>
<p>PDFio is Copyright © 2021-2022 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 &quot;LICENSE&quot; and &quot;NOTICE&quot; for more information.</p>
<p>PDFio is Copyright © 2021-2023 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 &quot;LICENSE&quot; and &quot;NOTICE&quot; for more information.</p>
<h3 class="title" id="requirements">Requirements</h3>
<p>PDFio requires the following to build the software:</p>
<ul>
@ -1388,7 +1388,7 @@ bool pdfioContentFillAndStroke(<a href="#pdfio_stream_t">pdfio_stream_t</a> *st,
<p class="description"><code>true</code> on success, <code>false</code> on failure</p>
<h3 class="function"><a id="pdfioContentMatrixConcat">pdfioContentMatrixConcat</a></h3>
<p class="description">Concatenate a matrix to the current graphics
state.</p>
state.</p>
<p class="code">
bool pdfioContentMatrixConcat(<a href="#pdfio_stream_t">pdfio_stream_t</a> *st, pdfio_matrix_t m);</p>
<h4 class="parameters">Parameters</h4>
@ -1614,6 +1614,9 @@ bool pdfioContentSetDashPattern(<a href="#pdfio_stream_t">pdfio_stream_t</a> *st
</tbody></table>
<h4 class="returnvalue">Return Value</h4>
<p class="description"><code>true</code> on success, <code>false</code> on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function sets the stroke pattern when drawing lines. If &quot;on&quot; and &quot;off&quot;
are 0, a solid line is drawn.</p>
<h3 class="function"><a id="pdfioContentSetFillColorDeviceCMYK">pdfioContentSetFillColorDeviceCMYK</a></h3>
<p class="description">Set device CMYK fill color.</p>
<p class="code">
@ -2301,6 +2304,7 @@ my_dict_cb(pdfio_dict_t *dict, const char *key, void *cb_data)
... return true to continue or false to stop ...
}
</pre>
The iteration continues as long as the callback returns <code>true</code> or all keys
have been iterated.</p>
<h3 class="function"><a id="pdfioDictSetArray">pdfioDictSetArray</a></h3>
@ -2741,9 +2745,10 @@ 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
// Write buffer to output and return the number of bytes written
}
</pre>
The &quot;version&quot; argument specifies the PDF version number for the file or
<code>NULL</code> for the default (&quot;2.0&quot;).<br>
<br>
@ -3152,7 +3157,7 @@ double pdfioImageGetWidth(<a href="#pdfio_obj_t">pdfio_obj_t</a> *obj);</p>
<p class="description">Width in columns</p>
<h3 class="function"><a id="pdfioObjClose">pdfioObjClose</a></h3>
<p class="description">Close an object, writing any data as needed to the PDF
file.</p>
file.</p>
<p class="code">
bool pdfioObjClose(<a href="#pdfio_obj_t">pdfio_obj_t</a> *obj);</p>
<h4 class="parameters">Parameters</h4>
@ -3413,6 +3418,13 @@ bool pdfioStreamGetToken(<a href="#pdfio_stream_t">pdfio_stream_t</a> *st, char
</tbody></table>
<h4 class="returnvalue">Return Value</h4>
<p class="description"><code>true</code> on success, <code>false</code> on EOF</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function reads a single PDF token from a stream. Operator tokens,
boolean values, and numbers are returned as-is in the provided string buffer.
String values start with the opening parenthesis ('(') but have all escaping
resolved and the terminating parenthesis removed. Hexadecimal string values
start with the opening angle bracket ('&lt;') and have all whitespace and the
terminating angle bracket removed.</p>
<h3 class="function"><a id="pdfioStreamPeek">pdfioStreamPeek</a></h3>
<p class="description">Peek at data in a stream.</p>
<p class="code">

2
doc/pdfio.md
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@ -15,7 +15,7 @@ goals of pdfio are:
PDFio is *not* concerned with rendering or viewing a PDF file, although a PDF
RIP or viewer could be written using it.
PDFio is Copyright © 2021-2022 by Michael R Sweet and is licensed under the
PDFio is Copyright © 2021-2023 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.

12
pdfio-content.c
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@ -1,7 +1,7 @@
//
// Content helper functions for PDFio.
//
// Copyright © 2021 by Michael R Sweet.
// Copyright © 2021-2023 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
@ -670,6 +670,9 @@ pdfioContentSave(pdfio_stream_t *st) // I - Stream
//
// 'pdfioContentSetDashPattern()' - Set the stroke pattern.
//
// This function sets the stroke pattern when drawing lines. If "on" and "off"
// are 0, a solid line is drawn.
//
bool // O - `true` on success, `false` on failure
pdfioContentSetDashPattern(
@ -678,7 +681,12 @@ pdfioContentSetDashPattern(
double on, // I - On length
double off) // I - Off length
{
return (pdfioStreamPrintf(st, "[%g %g] %g d\n", on, off, phase));
if (on <= 0.0 && off <= 0.0)
return (pdfioStreamPrintf(st, "[] %g d\n", phase));
else if (fabs(on - off) < 0.001)
return (pdfioStreamPrintf(st, "[%g] %g d\n", on, phase));
else
return (pdfioStreamPrintf(st, "[%g %g] %g d\n", on, off, phase));
}