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<title>Exiv2: Exiv2::TiffHeaderBase Class Reference</title>
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<a class="el" href="namespaceExiv2.html">Exiv2</a>::<a class="el" href="classExiv2_1_1TiffHeaderBase.html">TiffHeaderBase</a></div>
<h1>Exiv2::TiffHeaderBase Class Reference</h1><!-- doxytag: class="Exiv2::TiffHeaderBase" -->Abstract base class defining the interface of an image header. Used internally by classes for TIFF-based images. Default implementation is for the regular TIFF header.  
<a href="#_details">More...</a>
<p>
<code>#include &lt;tiffimage.hpp&gt;</code>
<p>
<div class="dynheader">
Inheritance diagram for Exiv2::TiffHeaderBase:</div>
<div class="dynsection">
<p><center><img src="classExiv2_1_1TiffHeaderBase__inherit__graph.png" border="0" usemap="#Exiv2_1_1TiffHeaderBase__inherit__map" alt="Inheritance graph"></center>
<map name="Exiv2_1_1TiffHeaderBase__inherit__map">
<area shape="rect" href="classExiv2_1_1Cr2Header.html" title="Canon CR2 header structure." alt="" coords="5,81,187,105"><area shape="rect" href="classExiv2_1_1OrfHeader.html" title="Olympus ORF header structure." alt="" coords="211,81,392,105"><area shape="rect" href="classExiv2_1_1TiffHeade2.html" title="Standard TIFF header structure." alt="" coords="416,81,608,105"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>

<p>
<a href="classExiv2_1_1TiffHeaderBase-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Constructors</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="aaafc306cfb85263006a0b98aeb4478f"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::TiffHeaderBase" ref="aaafc306cfb85263006a0b98aeb4478f" args="(uint16_t tag, uint32_t size, ByteOrder byteOrder, uint32_t offset)" -->
&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#aaafc306cfb85263006a0b98aeb4478f">TiffHeaderBase</a> (uint16_t tag, uint32_t size, <a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> byteOrder, uint32_t offset)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Constructor taking <em>tag</em>, <em>size</em> and default <em>byteOrder</em> and <em>offset</em>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="a077e73b502b8d0da95856fcb0073b82"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::~TiffHeaderBase" ref="a077e73b502b8d0da95856fcb0073b82" args="()=0" -->
virtual&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#a077e73b502b8d0da95856fcb0073b82">~TiffHeaderBase</a> ()=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Virtual destructor. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Manipulators</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#079d64e27adfe8af0262bbb8b2ec0d66">read</a> (const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> *pData, uint32_t size)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Read the image header from a data buffer. Return false if the data buffer does not contain an image header of the expected format, else true.  <a href="#079d64e27adfe8af0262bbb8b2ec0d66"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="6f066cb8546499beeff37dfb3b50db32"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::setByteOrder" ref="6f066cb8546499beeff37dfb3b50db32" args="(ByteOrder byteOrder)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#6f066cb8546499beeff37dfb3b50db32">setByteOrder</a> (<a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a> byteOrder)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set the byte order. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c8d7f07def291d1679b0129a622f99e1"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::setOffset" ref="c8d7f07def291d1679b0129a622f99e1" args="(uint32_t offset)" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#c8d7f07def291d1679b0129a622f99e1">setOffset</a> (uint32_t offset)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set the offset to the start of the root directory. <br></td></tr>
<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#c5379d2c4150760ab0424804a659c034">write</a> (<a class="el" href="namespaceExiv2.html#6e7b9a2ef47caec919b15f1ae6ff4872">Blob</a> &amp;blob) const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Write the image header to the binary image <em>blob</em>. This method appends to the blob.  <a href="#c5379d2c4150760ab0424804a659c034"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#6fb9cae3e8d8c9b8c2a02d757c189846">print</a> (std::ostream &amp;os, const std::string &amp;prefix=&quot;&quot;) const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Print debug info for the image header to <em>os</em>.  <a href="#6fb9cae3e8d8c9b8c2a02d757c189846"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9ceb9b21536daa3961150b8377fb35d9"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::byteOrder" ref="9ceb9b21536daa3961150b8377fb35d9" args="() const " -->
virtual <a class="el" href="namespaceExiv2.html#94c225faf6d6c611a3828fae1c28efa6">ByteOrder</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#9ceb9b21536daa3961150b8377fb35d9">byteOrder</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Return the byte order (little or big endian). <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="cc6cb95452cc74e6e8e4ef5c8704ca75"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::offset" ref="cc6cb95452cc74e6e8e4ef5c8704ca75" args="() const " -->
virtual uint32_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#cc6cb95452cc74e6e8e4ef5c8704ca75">offset</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Return the offset to the start of the root directory. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="68b3965504f78c8b8ee68711e74bd432"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::size" ref="68b3965504f78c8b8ee68711e74bd432" args="() const " -->
virtual uint32_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#68b3965504f78c8b8ee68711e74bd432">size</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Return the size (in bytes) of the image header. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="69268d4107f733a26885a335a5cff9e6"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::tag" ref="69268d4107f733a26885a335a5cff9e6" args="() const " -->
virtual uint16_t&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classExiv2_1_1TiffHeaderBase.html#69268d4107f733a26885a335a5cff9e6">tag</a> () const </td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Return the tag value (magic number) which identifies the buffer as TIFF data. <br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Abstract base class defining the interface of an image header. Used internally by classes for TIFF-based images. Default implementation is for the regular TIFF header. <hr><h2>Member Function Documentation</h2>
<a class="anchor" name="079d64e27adfe8af0262bbb8b2ec0d66"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::read" ref="079d64e27adfe8af0262bbb8b2ec0d66" args="(const byte *pData, uint32_t size)" -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">virtual bool Exiv2::TiffHeaderBase::read           </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="namespaceExiv2.html#16f60a5bd4207fe155f6cf93a15efa72">byte</a> *&nbsp;</td>
          <td class="paramname"> <em>pData</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">uint32_t&nbsp;</td>
          <td class="paramname"> <em>size</em></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"><code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Read the image header from a data buffer. Return false if the data buffer does not contain an image header of the expected format, else true. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>pData</em>&nbsp;</td><td>Pointer to the data buffer. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>size</em>&nbsp;</td><td>Number of bytes in the data buffer. </td></tr>
  </table>
</dl>

<p>Reimplemented in <a class="el" href="classExiv2_1_1Cr2Header.html#42264154efe7ae61a47276a5eb2e366d">Exiv2::Cr2Header</a>, and <a class="el" href="classExiv2_1_1OrfHeader.html#37cbc9902d1ecffc953833d201a0222e">Exiv2::OrfHeader</a>.</p>

</div>
</div><p>
<a class="anchor" name="c5379d2c4150760ab0424804a659c034"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::write" ref="c5379d2c4150760ab0424804a659c034" args="(Blob &amp;blob) const " -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">virtual void Exiv2::TiffHeaderBase::write           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="namespaceExiv2.html#6e7b9a2ef47caec919b15f1ae6ff4872">Blob</a> &amp;&nbsp;</td>
          <td class="paramname"> <em>blob</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td width="100%"> const<code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Write the image header to the binary image <em>blob</em>. This method appends to the blob. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>blob</em>&nbsp;</td><td>Binary image to add to.</td></tr>
  </table>
</dl>
<dl compact><dt><b>Exceptions:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em><a class="el" href="classExiv2_1_1Error.html" title="Simple error class used for exceptions. An output operator is provided to print errors...">Error</a></em>&nbsp;</td><td>If the header cannot be written. </td></tr>
  </table>
</dl>

<p>Reimplemented in <a class="el" href="classExiv2_1_1Cr2Header.html#9b2dfde37f3917a9d4a93b672337f617">Exiv2::Cr2Header</a>, and <a class="el" href="classExiv2_1_1OrfHeader.html#08e82e2bfbb39ba210fde7241cea6b91">Exiv2::OrfHeader</a>.</p>

</div>
</div><p>
<a class="anchor" name="6fb9cae3e8d8c9b8c2a02d757c189846"></a><!-- doxytag: member="Exiv2::TiffHeaderBase::print" ref="6fb9cae3e8d8c9b8c2a02d757c189846" args="(std::ostream &amp;os, const std::string &amp;prefix=&quot;&quot;) const " -->
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">virtual void Exiv2::TiffHeaderBase::print           </td>
          <td>(</td>
          <td class="paramtype">std::ostream &amp;&nbsp;</td>
          <td class="paramname"> <em>os</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const std::string &amp;&nbsp;</td>
          <td class="paramname"> <em>prefix</em> = <code>&quot;&quot;</code></td><td>&nbsp;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td><td width="100%"> const<code> [virtual]</code></td>
        </tr>
      </table>
</div>
<div class="memdoc">

<p>
Print debug info for the image header to <em>os</em>. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>os</em>&nbsp;</td><td>Output stream to write to. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>prefix</em>&nbsp;</td><td>Prefix to be written before each line of output. </td></tr>
  </table>
</dl>

</div>
</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="tiffimage_8hpp.html">tiffimage.hpp</a></ul>
<hr size="1"><address style="text-align: right;"><small>Generated on Tue Feb 5 11:51:12 2008 for Exiv2 by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.4 </small></address>
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