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<!ENTITY suncopy "Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved.">

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<refentry id="TIFFbuffer-3tiff">

<refmeta><refentrytitle>TIFFbuffer</refentrytitle><manvolnum>3tiff</manvolnum>

<refmiscinfo class="date">01 Apr 2004</refmiscinfo>

<refmiscinfo class="sectdesc">&man3;</refmiscinfo>

<refmiscinfo class="software">&release;</refmiscinfo>

<refmiscinfo class="arch">generic</refmiscinfo>

<refmiscinfo class="copyright">&suncopy;</refmiscinfo>

</refmeta>

<indexterm><primary>TIFFbuffer</primary></indexterm><indexterm><primary>TIFFReadBufferSetup

</primary></indexterm><indexterm><primary>TIFFWriteBufferSetup</primary></indexterm>

<indexterm><primary>I<?Pub Caret1>/O buffering control routines</primary>

</indexterm>

<refnamediv id="TIFFbuffer-3tiff-name"><refdescriptor>TIFFbuffer</refdescriptor>

<refname>TIFFReadBufferSetup</refname><refname>TIFFWriteBufferSetup</refname>

<refpurpose>I/O buffering control routines</refpurpose></refnamediv>

<refsect1 id="TIFFbuffer-3tiff-synp"><title>&synp-tt;</title>

<programlisting>#include &lt;tiffio.h>

int TIFFReadBufferSetup(TIFF*, tdata_t buffer, tsize_t size);

int TIFFWriteBufferSetup(TIFF*, tdata_t buffer, tsize_t size);

</programlisting>

</refsect1>

<refsect1 id="TIFFbuffer-3tiff-desc"><title>&desc-tt;</title>

<para>The following routines are provided for client-control of the I/O buffers

used by the library. Applications need never use these routines. The routines

are provided only for &ldquo;intelligent clients&rdquo; that wish to optimize

memory usage and/or eliminate potential copy operations that can occur when

working with images that have data stored without compression.</para>

</refsect1>

<refsect1 id="TIFFbuffer-3tiff-exde"><title>&exde-tt;</title>

<para><literal>TIFFReadBufferSetup</literal> sets up the data buffer used

to read raw (encoded) data from a file. If the specified pointer is NULL (zero),

then a buffer of the appropriate size is allocated. Otherwise, the caller

must guarantee that the buffer is large enough to hold any individual strip

of raw data. <literal>TIFFReadBufferSetup</literal> returns a non-zero value

if the setup was successful.</para>

<para><literal>TIFFWriteBufferSetup</literal> sets up the data buffer used

to write raw (encoded) data to a file. If the specified size is -1 then the

buffer size is selected to hold a complete tile or strip, or at least 8 kilobytes,

whichever is greater. If the specified buffer is NULL (zero), then a buffer

of the appropriate size is dynamically allocated. <literal>TIFFWriteBufferSetup

</literal> returns a non-zero value if the setup was successful.</para>

<refsect2 id="TIFFbuffer-3tiff-exde-diags">

<title>Diagnostics</title>

<variablelist termlength="wholeline">

<varlistentry><term>%s: No space for data buffer at scanline %ld.</term><listitem>

<para><literal>TIFFReadBufferSetup</literal> was unable to dynamically allocate

space for a data buffer.</para>

</listitem></varlistentry>

<varlistentry><term>%s: No space for output buffer.</term><listitem><para><literal>

TIFFWriteBufferSetup</literal> was unable to dynamically allocate space for

a data buffer.</para>

</listitem></varlistentry>

</variablelist></refsect2>

</refsect1>

<refsect1 id="TIFFbuffer-3tiff-attr"><title>&attr-tt;</title>

<para>See <olink targetdocent="REFMAN5" localinfo="attributes-5"><citerefentry>

<refentrytitle>attributes</refentrytitle><manvolnum>5</manvolnum></citerefentry></olink>

for descriptions of the following attributes:</para>

<informaltable frame="all">

<tgroup cols="2" colsep="1" rowsep="1"><colspec colname="COLSPEC0" colwidth="1*">

<colspec colname="COLSPEC1" colwidth="1*">

<thead>

<row><entry align="center" valign="middle">ATTRIBUTE TYPE</entry><entry align="center"

valign="middle">ATTRIBUTE VALUE</entry></row>

</thead>

<tbody>

<row><entry><para>Availability</para></entry><entry><para>image/library/libtiff</para></entry>

</row>

<row><entry colname="COLSPEC0"><para>Interface stability</para></entry><entry

colname="COLSPEC1"><para>Uncommitted</para></entry></row>

</tbody>

</tgroup>

</informaltable>

</refsect1>

<refsect1 id="TIFFbuffer-3tiff-also"><title>&also-tt;</title>

<para><citerefentry><refentrytitle>libtiff</refentrytitle><manvolnum>3</manvolnum>

</citerefentry></para>

</refsect1>

<refsect1 id="TIFFbuffer-3tiff-note"><title>&note-tt;</title>

<para>This man page was originally written by Sam Leffler. Updated by Breda McColgan, Sun Microsystems Inc., 2004.</para>

</refsect1>

</refentry>

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