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Michael R Sweet
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doc/pdfio.3
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doc/pdfio.3
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.TH pdfio 3 "pdf read/write library" "2021-07-26" "pdf read/write library"
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.TH pdfio 3 "pdf read/write library" "2021-08-30" "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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@ -412,6 +412,10 @@ pdfioArrayCreateColorFromPalette creates an indexed color array from an array of
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.PP
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pdfioArrayCreateColorFromPrimaries creates a color array using CIE XYZ primaries and a gamma value
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.IP \(bu 5
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.PP
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pdfioArrayCreateColorFromStandard creates a color array for a standard color space
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.PP
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You can embed an ICC color profile using the pdfioFileCreateICCObjFromFile function:
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@ -429,13 +433,13 @@ PDFio also includes predefined constants for creating a few standard color space
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pdfio_file_t *pdf = pdfioFileCreate(...);
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// Create an AdobeRGB color array
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioAdobeRGBGamma, pdfioAdobeRGBMatrix, pdfioAdobeRGBWhitePoint);
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_ADOBE);
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// Create an Display P3 color array
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioDisplay P3Gamma, pdfioDisplay P3Matrix, pdfioDisplay P3WhitePoint);
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_P3_D65);
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// Create an sRGB color array
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pdfio_array_t *srgb = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioSRGBGamma, pdfioSRGBMatrix, pdfioSRGBWhitePoint);
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pdfio_array_t *srgb = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_SRGB);
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.fi
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.PP
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Font Object Functions
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@ -782,6 +786,20 @@ pdfioContentTextShowJustified draws an array of literal strings with offsets bet
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.SH ENUMERATIONS
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.SS pdfio_cs_e
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Standard color spaces
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.TP 5
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PDFIO_CS_ADOBE
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.br
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AdobeRGB 1998
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.TP 5
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PDFIO_CS_P3_D65
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.br
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Display P3
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.TP 5
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PDFIO_CS_SRGB
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.br
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sRGB
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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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@ -1085,6 +1103,19 @@ pdfio_array_t * pdfioArrayCreateColorFromPrimaries (
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double by
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);
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.fi
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.SS pdfioArrayCreateColorFromStandard
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Create a color array for a standard color space.
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.PP
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.nf
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pdfio_array_t * pdfioArrayCreateColorFromStandard (
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pdfio_file_t *pdf,
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size_t num_colors,
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pdfio_cs_t cs
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);
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.fi
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.PP
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This function creates a color array for a standard \fBPDFIO_CS_\fR enumerated color space.
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The "num_colors" argument must be \fB1\fR for grayscale and \fB3\fR for RGB color.
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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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@ -2613,6 +2644,12 @@ Array of PDF values
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.nf
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typedef struct _pdfio_array_s pdfio_array_t;
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.fi
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.SS pdfio_cs_t
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Standard color spaces
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.PP
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.nf
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typedef enum pdfio_cs_e pdfio_cs_t;
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.fi
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.SS pdfio_dict_t
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Key/value dictionary
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.PP
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@ -283,6 +283,7 @@ span.string {
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<li><a href="#pdfioArrayCreateColorFromMatrix">pdfioArrayCreateColorFromMatrix</a></li>
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<li><a href="#pdfioArrayCreateColorFromPalette">pdfioArrayCreateColorFromPalette</a></li>
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<li><a href="#pdfioArrayCreateColorFromPrimaries">pdfioArrayCreateColorFromPrimaries</a></li>
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<li><a href="#pdfioArrayCreateColorFromStandard">pdfioArrayCreateColorFromStandard</a></li>
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<li><a href="#pdfioArrayGetArray">pdfioArrayGetArray</a></li>
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<li><a href="#pdfioArrayGetBinary">pdfioArrayGetBinary</a></li>
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<li><a href="#pdfioArrayGetBoolean">pdfioArrayGetBoolean</a></li>
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@ -435,6 +436,7 @@ span.string {
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</ul></li>
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<li><a href="#TYPES">Data Types</a><ul class="subcontents">
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<li><a href="#pdfio_array_t">pdfio_array_t</a></li>
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<li><a href="#pdfio_cs_t">pdfio_cs_t</a></li>
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<li><a href="#pdfio_dict_t">pdfio_dict_t</a></li>
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<li><a href="#pdfio_error_cb_t">pdfio_error_cb_t</a></li>
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<li><a href="#pdfio_file_t">pdfio_file_t</a></li>
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@ -452,6 +454,7 @@ span.string {
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<li><a href="#pdfio_rect_s">pdfio_rect_s</a></li>
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</ul></li>
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<li><a href="#ENUMERATIONS">Enumerations</a><ul class="subcontents">
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<li><a href="#pdfio_cs_e">pdfio_cs_e</a></li>
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<li><a href="#pdfio_filter_e">pdfio_filter_e</a></li>
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<li><a href="#pdfio_linecap_e">pdfio_linecap_e</a></li>
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<li><a href="#pdfio_linejoin_e">pdfio_linejoin_e</a></li>
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@ -700,6 +703,8 @@ pdfio_stream_t *pdfioObjCreateStream(obj, PDFIO_FILTER_FLATE);
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</li>
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<li><p><a href="#pdfioArrayCreateColorFromPrimaries"><code>pdfioArrayCreateColorFromPrimaries</code></a> creates a color array using CIE XYZ primaries and a gamma value</p>
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</li>
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<li><p><a href="#pdfioArrayCreateColorFromStandard"><code>pdfioArrayCreateColorFromStandard</code></a> creates a color array for a standard color space</p>
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</li>
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</ul>
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<p>You can embed an ICC color profile using the <a href="#pdfioFileCreateICCObjFromFile"><code>pdfioFileCreateICCObjFromFile</code></a> function:</p>
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<pre><code class="language-c">pdfio_file_t *pdf = pdfioFileCreate(...);
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@ -710,13 +715,13 @@ pdfio_obj_t *icc = pdfioFileCreateICCObjFromFile(pdf, <span class="string">"
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<pre><code class="language-c">pdfio_file_t *pdf = pdfioFileCreate(...);
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<span class="comment">// Create an AdobeRGB color array</span>
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromMatrix(pdf, <span class="number">3</span>, pdfioAdobeRGBGamma, pdfioAdobeRGBMatrix, pdfioAdobeRGBWhitePoint);
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromStandard(pdf, <span class="number">3</span>, PDFIO_CS_ADOBE);
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<span class="comment">// Create an Display P3 color array</span>
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromMatrix(pdf, <span class="number">3</span>, pdfioDisplay P3Gamma, pdfioDisplay P3Matrix, pdfioDisplay P3WhitePoint);
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromStandard(pdf, <span class="number">3</span>, PDFIO_CS_P3_D65);
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<span class="comment">// Create an sRGB color array</span>
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pdfio_array_t *srgb = pdfioArrayCreateColorFromMatrix(pdf, <span class="number">3</span>, pdfioSRGBGamma, pdfioSRGBMatrix, pdfioSRGBWhitePoint);
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pdfio_array_t *srgb = pdfioArrayCreateColorFromStandard(pdf, <span class="number">3</span>, PDFIO_CS_SRGB);
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</code></pre>
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<h4 id="font-object-functions">Font Object Functions</h4>
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<p>PDF supports many kinds of fonts, including PostScript Type1, PDF Type3, TrueType/OpenType, and CID. PDFio provides two functions for creating font objects. The first is <a href="#pdfioFileCreateFontObjFromBase"><code>pdfioFileCreateFontObjFromBase</code></a> which creates a font object for one of the base PDF fonts:</p>
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@ -1122,6 +1127,24 @@ bool pdfioArrayAppendString(<a href="#pdfio_array_t">pdfio_array_t</a> *a, const
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</tbody></table>
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<h4 class="returnvalue">Return Value</h4>
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<p class="description">Color space array</p>
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<h3 class="function"><a id="pdfioArrayCreateColorFromStandard">pdfioArrayCreateColorFromStandard</a></h3>
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<p class="description">Create a color array for a standard color space.</p>
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<p class="code">
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<a href="#pdfio_array_t">pdfio_array_t</a> *pdfioArrayCreateColorFromStandard(<a href="#pdfio_file_t">pdfio_file_t</a> *pdf, size_t num_colors, <a href="#pdfio_cs_t">pdfio_cs_t</a> cs);</p>
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<h4 class="parameters">Parameters</h4>
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<table class="list"><tbody>
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<tr><th>pdf</th>
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<td class="description">PDF file</td></tr>
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<tr><th>num_colors</th>
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<td class="description">Number of colors (1 or 3)</td></tr>
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<tr><th>cs</th>
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<td class="description">Color space enumeration</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">Color array</p>
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<h4 class="discussion">Discussion</h4>
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<p class="discussion">This function creates a color array for a standard <code>PDFIO_CS_</code> enumerated color space.
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The "num_colors" argument must be <code>1</code> for grayscale and <code>3</code> for RGB color.</p>
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<h3 class="function"><a id="pdfioArrayGetArray">pdfioArrayGetArray</a></h3>
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<p class="description">Get an array value from an array.</p>
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<p class="code">
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@ -3273,6 +3296,11 @@ char *pdfioStringCreatef(<a href="#pdfio_file_t">pdfio_file_t</a> *pdf, const ch
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<p class="code">
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typedef struct _pdfio_array_s pdfio_array_t;
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</p>
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<h3 class="typedef"><a id="pdfio_cs_t">pdfio_cs_t</a></h3>
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<p class="description">Standard color spaces</p>
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<p class="code">
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typedef enum <a href="#pdfio_cs_e">pdfio_cs_e</a> pdfio_cs_t;
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</p>
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<h3 class="typedef"><a id="pdfio_dict_t">pdfio_dict_t</a></h3>
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<p class="description">Key/value dictionary</p>
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<p class="code">
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@ -3354,6 +3382,14 @@ typedef enum <a href="#pdfio_valtype_e">pdfio_valtype_e</a> pdfio_valtype_t;
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<td class="description">Upper-right Y coordinate</td></tr>
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</tbody></table>
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<h2 class="title"><a id="ENUMERATIONS">Constants</a></h2>
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<h3 class="enumeration"><a id="pdfio_cs_e">pdfio_cs_e</a></h3>
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<p class="description">Standard color spaces</p>
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<h4 class="constants">Constants</h4>
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<table class="list"><tbody>
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<tr><th>PDFIO_CS_ADOBE </th><td class="description">AdobeRGB 1998</td></tr>
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<tr><th>PDFIO_CS_P3_D65 </th><td class="description">Display P3</td></tr>
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<tr><th>PDFIO_CS_SRGB </th><td class="description">sRGB</td></tr>
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</tbody></table>
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<h3 class="enumeration"><a id="pdfio_filter_e">pdfio_filter_e</a></h3>
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<p class="description">Compression/decompression filters for streams</p>
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<h4 class="constants">Constants</h4>
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@ -351,6 +351,7 @@ creating color space arrays:
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- [`pdfioArrayCreateColorFromMatrix`](@@) creates a color array using a CIE XYZ color transform matrix, a gamma value, and a CIE XYZ white point
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- [`pdfioArrayCreateColorFromPalette`](@@) creates an indexed color array from an array of sRGB values
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- [`pdfioArrayCreateColorFromPrimaries`](@@) creates a color array using CIE XYZ primaries and a gamma value
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- [`pdfioArrayCreateColorFromStandard`](@@) creates a color array for a standard color space
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You can embed an ICC color profile using the
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[`pdfioFileCreateICCObjFromFile`](@@) function:
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@ -370,13 +371,13 @@ spaces:
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pdfio_file_t *pdf = pdfioFileCreate(...);
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// Create an AdobeRGB color array
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioAdobeRGBGamma, pdfioAdobeRGBMatrix, pdfioAdobeRGBWhitePoint);
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pdfio_array_t *adobe_rgb = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_ADOBE);
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// Create an Display P3 color array
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioDisplay P3Gamma, pdfioDisplay P3Matrix, pdfioDisplay P3WhitePoint);
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pdfio_array_t *display_p3 = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_P3_D65);
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// Create an sRGB color array
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pdfio_array_t *srgb = pdfioArrayCreateColorFromMatrix(pdf, 3, pdfioSRGBGamma, pdfioSRGBMatrix, pdfioSRGBWhitePoint);
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pdfio_array_t *srgb = pdfioArrayCreateColorFromStandard(pdf, 3, PDFIO_CS_SRGB);
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```
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