150 lines
6.1 KiB
HTML
150 lines
6.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>FreeType-2.7 API Reference</title>
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</head>
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<body>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>
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<h1>FreeType-2.7 API Reference</h1>
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<h1 id="lzw">LZW Streams</h1>
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<h2>Synopsis</h2>
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<table class="synopsis">
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<tr><td><a href="#FT_Stream_OpenLZW">FT_Stream_OpenLZW</a></td><td></td><td></td><td></td></tr>
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</table>
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<p>This section contains the declaration of LZW-specific functions.</p>
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<div class="section">
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<h3 id="FT_Stream_OpenLZW">FT_Stream_OpenLZW</h3>
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<p>Defined in FT_LZW_H (freetype/ftlzw.h).</p>
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<pre>
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FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
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<b>FT_Stream_OpenLZW</b>( <a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> stream,
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<a href="ft2-system_interface.html#FT_Stream">FT_Stream</a> source );
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</pre>
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<p>Open a new stream to parse LZW-compressed font files. This is mainly used to support the compressed ‘*.pcf.Z’ fonts that come with XFree86.</p>
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<h4>input</h4>
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<table class="fields">
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<tr><td class="val" id="stream">stream</td><td class="desc">
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<p>The target embedding stream.</p>
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</td></tr>
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<tr><td class="val" id="source">source</td><td class="desc">
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<p>The source stream.</p>
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</td></tr>
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</table>
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<h4>return</h4>
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<p>FreeType error code. 0 means success.</p>
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<h4>note</h4>
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<p>The source stream must be opened <i>before</i> calling this function.</p>
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<p>Calling the internal function ‘FT_Stream_Close’ on the new stream will <b>not</b> call ‘FT_Stream_Close’ on the source stream. None of the stream objects will be released to the heap.</p>
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<p>The stream implementation is very basic and resets the decompression process each time seeking backwards is needed within the stream</p>
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<p>In certain builds of the library, LZW compression recognition is automatically handled when calling <a href="ft2-base_interface.html#FT_New_Face">FT_New_Face</a> or <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>. This means that if no font driver is capable of handling the raw compressed file, the library will try to open a LZW stream from it and re-open the face with it.</p>
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<p>This function may return ‘FT_Err_Unimplemented_Feature’ if your build of FreeType was not compiled with LZW support.</p>
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<hr>
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<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>
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</body>
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</html>
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