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|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Coverage Maps</title>
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<tr><td colspan="5" class="shortcuts"><nobr><a href="#id2759699" class="shortcut">Top</a>
 | 
<a href="#id2759993" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="pango-Coverage-Maps"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id2759699"></a><span class="refentrytitle">Coverage Maps</span>
</h2>
<p>Coverage Maps — Unicode character range coverage storage</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
enum <a href="pango-Coverage-Maps.html#PangoCoverageLevel">PangoCoverageLevel</a>;
#define <a href="pango-Coverage-Maps.html#PANGO-TYPE-COVERAGE-LEVEL:CAPS">PANGO_TYPE_COVERAGE_LEVEL</a>
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>;
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* <a href="pango-Coverage-Maps.html#pango-coverage-new">pango_coverage_new</a> (void);
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* <a href="pango-Coverage-Maps.html#pango-coverage-ref">pango_coverage_ref</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);
void <a href="pango-Coverage-Maps.html#pango-coverage-unref">pango_coverage_unref</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* <a href="pango-Coverage-Maps.html#pango-coverage-copy">pango_coverage_copy</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);
<a href="pango-Coverage-Maps.html#PangoCoverageLevel">PangoCoverageLevel</a> <a href="pango-Coverage-Maps.html#pango-coverage-get">pango_coverage_get</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
int index_);
void <a href="pango-Coverage-Maps.html#pango-coverage-max">pango_coverage_max</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *other);
void <a href="pango-Coverage-Maps.html#pango-coverage-set">pango_coverage_set</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
int index_,
<a href="pango-Coverage-Maps.html#PangoCoverageLevel">PangoCoverageLevel</a> level);
void <a href="pango-Coverage-Maps.html#pango-coverage-to-bytes">pango_coverage_to_bytes</a> (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
<a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> **bytes,
int *n_bytes);
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* <a href="pango-Coverage-Maps.html#pango-coverage-from-bytes">pango_coverage_from_bytes</a> (<a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *bytes,
int n_bytes);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id2759993"></a><h2>Description</h2>
<p>
It is often necessary in Pango to determine if a particular font can
represent a particular character, and also how well it can represent
that character. The <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a> is a data structure that is used
to represent that information.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2760019"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id2760030"></a><h3>
<a name="PangoCoverageLevel"></a>enum PangoCoverageLevel</h3>
<a class="indexterm" name="id2760043"></a><pre class="programlisting">typedef enum {
PANGO_COVERAGE_NONE,
PANGO_COVERAGE_FALLBACK,
PANGO_COVERAGE_APPROXIMATE,
PANGO_COVERAGE_EXACT
} PangoCoverageLevel;
</pre>
<p>
Used to indicate how well a font can represent a particular Unicode
character point for a particular script.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><a name="PANGO-COVERAGE-NONE:CAPS"></a><code class="literal">PANGO_COVERAGE_NONE</code></span></td>
<td>The character is not representable with the font.
</td>
</tr>
<tr>
<td><span class="term"><a name="PANGO-COVERAGE-FALLBACK:CAPS"></a><code class="literal">PANGO_COVERAGE_FALLBACK</code></span></td>
<td>The character is represented in a way that may be
comprehensible but is not the correct graphical form.
For instance, a Hangul character represented as a
a sequence of Jamos, or a Latin transliteration of
a Cyrillic word.
</td>
</tr>
<tr>
<td><span class="term"><a name="PANGO-COVERAGE-APPROXIMATE:CAPS"></a><code class="literal">PANGO_COVERAGE_APPROXIMATE</code></span></td>
<td>The character is represented as basically the correct
graphical form, but with a stylistic variant inappropriate for
the current script.
</td>
</tr>
<tr>
<td><span class="term"><a name="PANGO-COVERAGE-EXACT:CAPS"></a><code class="literal">PANGO_COVERAGE_EXACT</code></span></td>
<td>The character is represented as the correct graphical form.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760167"></a><h3>
<a name="PANGO-TYPE-COVERAGE-LEVEL:CAPS"></a>PANGO_TYPE_COVERAGE_LEVEL</h3>
<a class="indexterm" name="id2760181"></a><pre class="programlisting">#define PANGO_TYPE_COVERAGE_LEVEL (pango_coverage_level_get_type())
</pre>
<p>
The <a
href="../gobject/gobject-The-Base-Object-Type.html#GObject"
><span class="type">GObject</span></a> type for <a href="pango-Coverage-Maps.html#PangoCoverageLevel"><span class="type">PangoCoverageLevel</span></a>.
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760213"></a><h3>
<a name="PangoCoverage"></a>PangoCoverage</h3>
<a class="indexterm" name="id2760226"></a><pre class="programlisting">typedef struct _PangoCoverage PangoCoverage;</pre>
<p>
The <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a> structure represents a map from Unicode characters
to <a href="pango-Coverage-Maps.html#PangoCoverageLevel"><span class="type">PangoCoverageLevel</span></a>. It is an opaque structure with no public fields.
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760260"></a><h3>
<a name="pango-coverage-new"></a>pango_coverage_new ()</h3>
<a class="indexterm" name="id2760274"></a><pre class="programlisting"><a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* pango_coverage_new (void);</pre>
<p>
Create a new <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> the newly allocated <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>,
initialized to <a href="pango-Coverage-Maps.html#PANGO-COVERAGE-NONE:CAPS"><code class="literal">PANGO_COVERAGE_NONE</code></a>
with a reference count of one, which
should be freed with <a href="pango-Coverage-Maps.html#pango-coverage-unref"><code class="function">pango_coverage_unref()</code></a>.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760353"></a><h3>
<a name="pango-coverage-ref"></a>pango_coverage_ref ()</h3>
<a class="indexterm" name="id2760366"></a><pre class="programlisting"><a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* pango_coverage_ref (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);</pre>
<p>
Increase the reference count on the <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a> by one</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> <em class="parameter"><code>coverage</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760449"></a><h3>
<a name="pango-coverage-unref"></a>pango_coverage_unref ()</h3>
<a class="indexterm" name="id2760462"></a><pre class="programlisting">void pango_coverage_unref (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);</pre>
<p>
Increase the reference count on the <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a> by one.
if the result is zero, free the coverage and all associated memory.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760531"></a><h3>
<a name="pango-coverage-copy"></a>pango_coverage_copy ()</h3>
<a class="indexterm" name="id2760544"></a><pre class="programlisting"><a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* pango_coverage_copy (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage);</pre>
<p>
Copy an existing <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>. (This function may now be unnecessary
since we refcount the structure. File a bug if you use it.)</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> the newly allocated <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>,
with a reference count of one, which
should be freed with <a href="pango-Coverage-Maps.html#pango-coverage-unref"><code class="function">pango_coverage_unref()</code></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760643"></a><h3>
<a name="pango-coverage-get"></a>pango_coverage_get ()</h3>
<a class="indexterm" name="id2760657"></a><pre class="programlisting"><a href="pango-Coverage-Maps.html#PangoCoverageLevel">PangoCoverageLevel</a> pango_coverage_get (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
int index_);</pre>
<p>
Determine whether a particular index is covered by <em class="parameter"><code>coverage</code></em></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>index_</code></em> :</span></td>
<td> the index to check
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> the coverage level of <em class="parameter"><code>coverage</code></em> for character <em class="parameter"><code>index_</code></em>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760764"></a><h3>
<a name="pango-coverage-max"></a>pango_coverage_max ()</h3>
<a class="indexterm" name="id2760777"></a><pre class="programlisting">void pango_coverage_max (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *other);</pre>
<p>
Set the coverage for each index in <em class="parameter"><code>coverage</code></em> to be the max (better)
value of the current coverage for the index and the coverage for
the corresponding index in <em class="parameter"><code>other</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>other</code></em> :</span></td>
<td> another <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2760879"></a><h3>
<a name="pango-coverage-set"></a>pango_coverage_set ()</h3>
<a class="indexterm" name="id2760892"></a><pre class="programlisting">void pango_coverage_set (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
int index_,
<a href="pango-Coverage-Maps.html#PangoCoverageLevel">PangoCoverageLevel</a> level);</pre>
<p>
Modify a particular index within <em class="parameter"><code>coverage</code></em></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>index_</code></em> :</span></td>
<td> the index to modify
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>level</code></em> :</span></td>
<td> the new level for <em class="parameter"><code>index_</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2761004"></a><h3>
<a name="pango-coverage-to-bytes"></a>pango_coverage_to_bytes ()</h3>
<a class="indexterm" name="id2761017"></a><pre class="programlisting">void pango_coverage_to_bytes (<a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a> *coverage,
<a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> **bytes,
int *n_bytes);</pre>
<p>
Convert a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a> structure into a flat binary format</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>coverage</code></em> :</span></td>
<td> a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>bytes</code></em> :</span></td>
<td> location to store result (must be freed with <a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"
><code class="function">g_free()</code></a>)
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>n_bytes</code></em> :</span></td>
<td> location to store size of result
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2761137"></a><h3>
<a name="pango-coverage-from-bytes"></a>pango_coverage_from_bytes ()</h3>
<a class="indexterm" name="id2761151"></a><pre class="programlisting"><a href="pango-Coverage-Maps.html#PangoCoverage">PangoCoverage</a>* pango_coverage_from_bytes (<a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *bytes,
int n_bytes);</pre>
<p>
Convert data generated from <code class="function">pango_converage_to_bytes()</code> back
to a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><span class="term"><em class="parameter"><code>bytes</code></em> :</span></td>
<td> binary data representing a <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>
</td>
</tr>
<tr>
<td><span class="term"><em class="parameter"><code>n_bytes</code></em> :</span></td>
<td> the size of <em class="parameter"><code>bytes</code></em> in bytes
</td>
</tr>
<tr>
<td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a newly allocated <a href="pango-Coverage-Maps.html#PangoCoverage"><span class="type">PangoCoverage</span></a>, or <a
href="/home/behdad/.local/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if
the data was invalid.
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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