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Basic Data Types
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Preamble
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FreeType's header inclusion scheme
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User allocation
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Basic Data Types
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Basic Data Types
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<li class="md-nav__item">
<a href="#synopsis" class="md-nav__link">
Synopsis
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<li class="md-nav__item">
<a href="#ft_byte" class="md-nav__link">
FT_Byte
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<li class="md-nav__item">
<a href="#ft_bytes" class="md-nav__link">
FT_Bytes
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<li class="md-nav__item">
<a href="#ft_char" class="md-nav__link">
FT_Char
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<li class="md-nav__item">
<a href="#ft_int" class="md-nav__link">
FT_Int
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<li class="md-nav__item">
<a href="#ft_uint" class="md-nav__link">
FT_UInt
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</li>
<li class="md-nav__item">
<a href="#ft_int16" class="md-nav__link">
FT_Int16
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint16" class="md-nav__link">
FT_UInt16
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int32" class="md-nav__link">
FT_Int32
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</li>
<li class="md-nav__item">
<a href="#ft_uint32" class="md-nav__link">
FT_UInt32
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int64" class="md-nav__link">
FT_Int64
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint64" class="md-nav__link">
FT_UInt64
</a>
</li>
<li class="md-nav__item">
<a href="#ft_short" class="md-nav__link">
FT_Short
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ushort" class="md-nav__link">
FT_UShort
</a>
</li>
<li class="md-nav__item">
<a href="#ft_long" class="md-nav__link">
FT_Long
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ulong" class="md-nav__link">
FT_ULong
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bool" class="md-nav__link">
FT_Bool
</a>
</li>
<li class="md-nav__item">
<a href="#ft_offset" class="md-nav__link">
FT_Offset
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ptrdist" class="md-nav__link">
FT_PtrDist
</a>
</li>
<li class="md-nav__item">
<a href="#ft_string" class="md-nav__link">
FT_String
</a>
</li>
<li class="md-nav__item">
<a href="#ft_tag" class="md-nav__link">
FT_Tag
</a>
</li>
<li class="md-nav__item">
<a href="#ft_error" class="md-nav__link">
FT_Error
</a>
</li>
<li class="md-nav__item">
<a href="#ft_fixed" class="md-nav__link">
FT_Fixed
</a>
</li>
<li class="md-nav__item">
<a href="#ft_pointer" class="md-nav__link">
FT_Pointer
</a>
</li>
<li class="md-nav__item">
<a href="#ft_pos" class="md-nav__link">
FT_Pos
</a>
</li>
<li class="md-nav__item">
<a href="#ft_vector" class="md-nav__link">
FT_Vector
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bbox" class="md-nav__link">
FT_BBox
</a>
</li>
<li class="md-nav__item">
<a href="#ft_matrix" class="md-nav__link">
FT_Matrix
</a>
</li>
<li class="md-nav__item">
<a href="#ft_fword" class="md-nav__link">
FT_FWord
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ufword" class="md-nav__link">
FT_UFWord
</a>
</li>
<li class="md-nav__item">
<a href="#ft_f2dot14" class="md-nav__link">
FT_F2Dot14
</a>
</li>
<li class="md-nav__item">
<a href="#ft_unitvector" class="md-nav__link">
FT_UnitVector
</a>
</li>
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FT_F26Dot6
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</li>
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FT_Data
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FT_MAKE_TAG
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FT_Generic
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FT_Generic_Finalizer
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FT_Bitmap
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FT_Pixel_Mode
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FT_Glyph_Format
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FT_IMAGE_TAG
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Face Creation
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Font Testing Macros
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Sizing and Scaling
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Glyph Retrieval
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Character Mapping
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Information Retrieval
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<a href="ft2-glyph_variants.html" class="md-nav__link">
Unicode Variation Sequences
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Glyph Color Management
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Glyph Layer Management
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Glyph Management
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Mac Specific Interface
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Size Management
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Header File Macros
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Format-Specific API
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Format-Specific API
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Multiple Masters
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TrueType Tables
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Type 1 Tables
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SFNT Names
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BDF and PCF Files
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CID Fonts
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PFR Fonts
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Window FNT Files
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OpenType SVG Fonts
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Font Formats
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Gasp Table
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Controlling FreeType Modules
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Controlling FreeType Modules
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The auto-hinter
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The CFF driver
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The Type 1 and CID drivers
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The TrueType driver
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The PCF driver
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<a href="ft2-ot_svg_driver.html" class="md-nav__link">
The SVG driver
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<li class="md-nav__item">
<a href="ft2-properties.html" class="md-nav__link">
Driver properties
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Parameter Tags
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Subpixel Rendering
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Cache Sub-System
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<nav class="md-nav" aria-label="Cache Sub-System" data-md-level="1">
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Cache Sub-System
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Cache Sub-System
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Support API
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Support API
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<a href="ft2-computations.html" class="md-nav__link">
Computations
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List Processing
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Outline Processing
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<li class="md-nav__item">
<a href="ft2-quick_advance.html" class="md-nav__link">
Quick retrieval of advance values
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Bitmap Handling
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Scanline Converter
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Glyph Stroker
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System Interface
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Module Management
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GZIP Streams
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LZW Streams
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BZIP2 Streams
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External Debugging APIs
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Error Codes
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Error Enumerations
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Error Code Values
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Miscellaneous
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TrueTypeGX/AAT Validation
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Incremental Loading
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The TrueType Engine
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<li class="md-nav__item">
<a href="#synopsis" class="md-nav__link">
Synopsis
</a>
</li>
<li class="md-nav__item">
<a href="#ft_byte" class="md-nav__link">
FT_Byte
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bytes" class="md-nav__link">
FT_Bytes
</a>
</li>
<li class="md-nav__item">
<a href="#ft_char" class="md-nav__link">
FT_Char
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int" class="md-nav__link">
FT_Int
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint" class="md-nav__link">
FT_UInt
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int16" class="md-nav__link">
FT_Int16
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint16" class="md-nav__link">
FT_UInt16
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int32" class="md-nav__link">
FT_Int32
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint32" class="md-nav__link">
FT_UInt32
</a>
</li>
<li class="md-nav__item">
<a href="#ft_int64" class="md-nav__link">
FT_Int64
</a>
</li>
<li class="md-nav__item">
<a href="#ft_uint64" class="md-nav__link">
FT_UInt64
</a>
</li>
<li class="md-nav__item">
<a href="#ft_short" class="md-nav__link">
FT_Short
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ushort" class="md-nav__link">
FT_UShort
</a>
</li>
<li class="md-nav__item">
<a href="#ft_long" class="md-nav__link">
FT_Long
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ulong" class="md-nav__link">
FT_ULong
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bool" class="md-nav__link">
FT_Bool
</a>
</li>
<li class="md-nav__item">
<a href="#ft_offset" class="md-nav__link">
FT_Offset
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ptrdist" class="md-nav__link">
FT_PtrDist
</a>
</li>
<li class="md-nav__item">
<a href="#ft_string" class="md-nav__link">
FT_String
</a>
</li>
<li class="md-nav__item">
<a href="#ft_tag" class="md-nav__link">
FT_Tag
</a>
</li>
<li class="md-nav__item">
<a href="#ft_error" class="md-nav__link">
FT_Error
</a>
</li>
<li class="md-nav__item">
<a href="#ft_fixed" class="md-nav__link">
FT_Fixed
</a>
</li>
<li class="md-nav__item">
<a href="#ft_pointer" class="md-nav__link">
FT_Pointer
</a>
</li>
<li class="md-nav__item">
<a href="#ft_pos" class="md-nav__link">
FT_Pos
</a>
</li>
<li class="md-nav__item">
<a href="#ft_vector" class="md-nav__link">
FT_Vector
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bbox" class="md-nav__link">
FT_BBox
</a>
</li>
<li class="md-nav__item">
<a href="#ft_matrix" class="md-nav__link">
FT_Matrix
</a>
</li>
<li class="md-nav__item">
<a href="#ft_fword" class="md-nav__link">
FT_FWord
</a>
</li>
<li class="md-nav__item">
<a href="#ft_ufword" class="md-nav__link">
FT_UFWord
</a>
</li>
<li class="md-nav__item">
<a href="#ft_f2dot14" class="md-nav__link">
FT_F2Dot14
</a>
</li>
<li class="md-nav__item">
<a href="#ft_unitvector" class="md-nav__link">
FT_UnitVector
</a>
</li>
<li class="md-nav__item">
<a href="#ft_f26dot6" class="md-nav__link">
FT_F26Dot6
</a>
</li>
<li class="md-nav__item">
<a href="#ft_data" class="md-nav__link">
FT_Data
</a>
</li>
<li class="md-nav__item">
<a href="#ft_make_tag" class="md-nav__link">
FT_MAKE_TAG
</a>
</li>
<li class="md-nav__item">
<a href="#ft_generic" class="md-nav__link">
FT_Generic
</a>
</li>
<li class="md-nav__item">
<a href="#ft_generic_finalizer" class="md-nav__link">
FT_Generic_Finalizer
</a>
</li>
<li class="md-nav__item">
<a href="#ft_bitmap" class="md-nav__link">
FT_Bitmap
</a>
</li>
<li class="md-nav__item">
<a href="#ft_pixel_mode" class="md-nav__link">
FT_Pixel_Mode
</a>
</li>
<li class="md-nav__item">
<a href="#ft_glyph_format" class="md-nav__link">
FT_Glyph_Format
</a>
</li>
<li class="md-nav__item">
<a href="#ft_image_tag" class="md-nav__link">
FT_IMAGE_TAG
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-content" data-md-component="content">
<article class="md-content__inner md-typeset">
<p><a href="https://www.freetype.org">FreeType</a> » <a href="../">Docs</a> » <a href="index.html#core-api">Core API</a> » Basic Data Types</p>
<hr />
<h1 id="basic-data-types">Basic Data Types<a class="headerlink" href="#basic-data-types" title="Permanent link">¶</a></h1>
<h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">¶</a></h2>
<p>This section contains the basic data types defined by FreeType 2, ranging from simple scalar types to bitmap descriptors. More font-specific structures are defined in a different section. Note that FreeType does not use floating-point data types. Fractional values are represented by fixed-point integers, with lower bits storing the fractional part.</p>
<h2 id="ft_byte">FT_Byte<a class="headerlink" href="#ft_byte" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <b>FT_Byte</b>;
</code></pre></div>
<p>A simple typedef for the <em>unsigned</em> char type.</p>
<hr>
<h2 id="ft_bytes">FT_Bytes<a class="headerlink" href="#ft_bytes" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_byte">FT_Byte</a>* <b>FT_Bytes</b>;
</code></pre></div>
<p>A typedef for constant memory areas.</p>
<hr>
<h2 id="ft_char">FT_Char<a class="headerlink" href="#ft_char" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">char</span> <b>FT_Char</b>;
</code></pre></div>
<p>A simple typedef for the <em>signed</em> char type.</p>
<hr>
<h2 id="ft_int">FT_Int<a class="headerlink" href="#ft_int" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">int</span> <b>FT_Int</b>;
</code></pre></div>
<p>A typedef for the int type.</p>
<hr>
<h2 id="ft_uint">FT_UInt<a class="headerlink" href="#ft_uint" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <b>FT_UInt</b>;
</code></pre></div>
<p>A typedef for the unsigned int type.</p>
<hr>
<h2 id="ft_int16">FT_Int16<a class="headerlink" href="#ft_int16" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_Int16</b>;
</code></pre></div>
<p>A typedef for a 16bit signed integer type.</p>
<hr>
<h2 id="ft_uint16">FT_UInt16<a class="headerlink" href="#ft_uint16" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UInt16</b>;
</code></pre></div>
<p>A typedef for a 16bit unsigned integer type.</p>
<hr>
<h2 id="ft_int32">FT_Int32<a class="headerlink" href="#ft_int32" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> XXX <b>FT_Int32</b>;
</code></pre></div>
<p>A typedef for a 32bit signed integer type. The size depends on the configuration.</p>
<hr>
<h2 id="ft_uint32">FT_UInt32<a class="headerlink" href="#ft_uint32" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> XXX <b>FT_UInt32</b>;
</code></pre></div>
<hr>
<h2 id="ft_int64">FT_Int64<a class="headerlink" href="#ft_int64" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> XXX <b>FT_Int64</b>;
</code></pre></div>
<hr>
<h2 id="ft_uint64">FT_UInt64<a class="headerlink" href="#ft_uint64" title="Permanent link">¶</a></h2>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> XXX <b>FT_UInt64</b>;
</code></pre></div>
<hr>
<h2 id="ft_short">FT_Short<a class="headerlink" href="#ft_short" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_Short</b>;
</code></pre></div>
<p>A typedef for signed short.</p>
<hr>
<h2 id="ft_ushort">FT_UShort<a class="headerlink" href="#ft_ushort" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UShort</b>;
</code></pre></div>
<p>A typedef for unsigned short.</p>
<hr>
<h2 id="ft_long">FT_Long<a class="headerlink" href="#ft_long" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Long</b>;
</code></pre></div>
<p>A typedef for signed long.</p>
<hr>
<h2 id="ft_ulong">FT_ULong<a class="headerlink" href="#ft_ulong" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">long</span> <b>FT_ULong</b>;
</code></pre></div>
<p>A typedef for unsigned long.</p>
<hr>
<h2 id="ft_bool">FT_Bool<a class="headerlink" href="#ft_bool" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <b>FT_Bool</b>;
</code></pre></div>
<p>A typedef of unsigned char, used for simple booleans. As usual, values 1 and 0 represent true and false, respectively.</p>
<hr>
<h2 id="ft_offset">FT_Offset<a class="headerlink" href="#ft_offset" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> size_t <b>FT_Offset</b>;
</code></pre></div>
<p>This is equivalent to the ANSI C <code>size_t</code> type, i.e., the largest <em>unsigned</em> integer type used to express a file size or position, or a memory block size.</p>
<hr>
<h2 id="ft_ptrdist">FT_PtrDist<a class="headerlink" href="#ft_ptrdist" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> ft_ptrdiff_t <b>FT_PtrDist</b>;
</code></pre></div>
<p>This is equivalent to the ANSI C <code>ptrdiff_t</code> type, i.e., the largest <em>signed</em> integer type used to express the distance between two pointers.</p>
<hr>
<h2 id="ft_string">FT_String<a class="headerlink" href="#ft_string" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">char</span> <b>FT_String</b>;
</code></pre></div>
<p>A simple typedef for the char type, usually used for strings.</p>
<hr>
<h2 id="ft_tag">FT_Tag<a class="headerlink" href="#ft_tag" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <a href="ft2-basic_types.html#ft_uint32">FT_UInt32</a> <b>FT_Tag</b>;
</code></pre></div>
<p>A typedef for 32-bit tags (as used in the SFNT format).</p>
<hr>
<h2 id="ft_error">FT_Error<a class="headerlink" href="#ft_error" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">int</span> <b>FT_Error</b>;
</code></pre></div>
<p>The FreeType error code type. A value of 0 is always interpreted as a successful operation.</p>
<hr>
<h2 id="ft_fixed">FT_Fixed<a class="headerlink" href="#ft_fixed" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Fixed</b>;
</code></pre></div>
<p>This type is used to store 16.16 fixed-point values, like scaling values or matrix coefficients.</p>
<hr>
<h2 id="ft_pointer">FT_Pointer<a class="headerlink" href="#ft_pointer" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">void</span>* <b>FT_Pointer</b>;
</code></pre></div>
<p>A simple typedef for a typeless pointer.</p>
<hr>
<h2 id="ft_pos">FT_Pos<a class="headerlink" href="#ft_pos" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_Pos</b>;
</code></pre></div>
<p>The type FT_Pos is used to store vectorial coordinates. Depending on the context, these can represent distances in integer font units, or 16.16, or 26.6 fixed-point pixel coordinates.</p>
<hr>
<h2 id="ft_vector">FT_Vector<a class="headerlink" href="#ft_vector" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Vector_
{
<a href="ft2-basic_types.html#ft_pos">FT_Pos</a> x;
<a href="ft2-basic_types.html#ft_pos">FT_Pos</a> y;
} <b>FT_Vector</b>;
</code></pre></div>
<p>A simple structure used to store a 2D vector; coordinates are of the FT_Pos type.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>The horizontal coordinate.</p>
</td></tr>
<tr><td class="val" id="y">y</td><td class="desc">
<p>The vertical coordinate.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_bbox">FT_BBox<a class="headerlink" href="#ft_bbox" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_BBox_
{
<a href="ft2-basic_types.html#ft_pos">FT_Pos</a> xMin, yMin;
<a href="ft2-basic_types.html#ft_pos">FT_Pos</a> xMax, yMax;
} <b>FT_BBox</b>;
</code></pre></div>
<p>A structure used to hold an outline's bounding box, i.e., the coordinates of its extrema in the horizontal and vertical directions.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="xmin">xMin</td><td class="desc">
<p>The horizontal minimum (left-most).</p>
</td></tr>
<tr><td class="val" id="ymin">yMin</td><td class="desc">
<p>The vertical minimum (bottom-most).</p>
</td></tr>
<tr><td class="val" id="xmax">xMax</td><td class="desc">
<p>The horizontal maximum (right-most).</p>
</td></tr>
<tr><td class="val" id="ymax">yMax</td><td class="desc">
<p>The vertical maximum (top-most).</p>
</td></tr>
</table>
<h4>note</h4>
<p>The bounding box is specified with the coordinates of the lower left and the upper right corner. In PostScript, those values are often called (llx,lly) and (urx,ury), respectively.</p>
<p>If <code>yMin</code> is negative, this value gives the glyph's descender. Otherwise, the glyph doesn't descend below the baseline. Similarly, if <code>ymax</code> is positive, this value gives the glyph's ascender.</p>
<p><code>xMin</code> gives the horizontal distance from the glyph's origin to the left edge of the glyph's bounding box. If <code>xMin</code> is negative, the glyph extends to the left of the origin.</p>
<hr>
<h2 id="ft_matrix">FT_Matrix<a class="headerlink" href="#ft_matrix" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Matrix_
{
<a href="ft2-basic_types.html#ft_fixed">FT_Fixed</a> xx, xy;
<a href="ft2-basic_types.html#ft_fixed">FT_Fixed</a> yx, yy;
} <b>FT_Matrix</b>;
</code></pre></div>
<p>A simple structure used to store a 2x2 matrix. Coefficients are in 16.16 fixed-point format. The computation performed is:
<div class="highlight"><pre><span></span><code> x' = x*xx + y*xy
y' = x*yx + y*yy
</code></pre></div></p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="xx">xx</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="xy">xy</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="yx">yx</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
<tr><td class="val" id="yy">yy</td><td class="desc">
<p>Matrix coefficient.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_fword">FT_FWord<a class="headerlink" href="#ft_fword" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_FWord</b>; /* distance in FUnits */
</code></pre></div>
<p>A signed 16-bit integer used to store a distance in original font units.</p>
<hr>
<h2 id="ft_ufword">FT_UFWord<a class="headerlink" href="#ft_ufword" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">unsigned</span> <span class="keyword">short</span> <b>FT_UFWord</b>; /* <span class="keyword">unsigned</span> distance */
</code></pre></div>
<p>An unsigned 16-bit integer used to store a distance in original font units.</p>
<hr>
<h2 id="ft_f2dot14">FT_F2Dot14<a class="headerlink" href="#ft_f2dot14" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">short</span> <b>FT_F2Dot14</b>;
</code></pre></div>
<p>A signed 2.14 fixed-point type used for unit vectors.</p>
<hr>
<h2 id="ft_unitvector">FT_UnitVector<a class="headerlink" href="#ft_unitvector" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_UnitVector_
{
<a href="ft2-basic_types.html#ft_f2dot14">FT_F2Dot14</a> x;
<a href="ft2-basic_types.html#ft_f2dot14">FT_F2Dot14</a> y;
} <b>FT_UnitVector</b>;
</code></pre></div>
<p>A simple structure used to store a 2D vector unit vector. Uses FT_F2Dot14 types.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="x">x</td><td class="desc">
<p>Horizontal coordinate.</p>
</td></tr>
<tr><td class="val" id="y">y</td><td class="desc">
<p>Vertical coordinate.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_f26dot6">FT_F26Dot6<a class="headerlink" href="#ft_f26dot6" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">signed</span> <span class="keyword">long</span> <b>FT_F26Dot6</b>;
</code></pre></div>
<p>A signed 26.6 fixed-point type used for vectorial pixel coordinates.</p>
<hr>
<h2 id="ft_data">FT_Data<a class="headerlink" href="#ft_data" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Data_
{
<span class="keyword">const</span> <a href="ft2-basic_types.html#ft_byte">FT_Byte</a>* pointer;
<a href="ft2-basic_types.html#ft_uint">FT_UInt</a> length;
} <b>FT_Data</b>;
</code></pre></div>
<p>Read-only binary data represented as a pointer and a length.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="pointer">pointer</td><td class="desc">
<p>The data.</p>
</td></tr>
<tr><td class="val" id="length">length</td><td class="desc">
<p>The length of the data in bytes.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_make_tag">FT_MAKE_TAG<a class="headerlink" href="#ft_make_tag" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_MAKE_TAG</b>( _x1, _x2, _x3, _x4 ) \
( ( FT_STATIC_BYTE_CAST( <a href="ft2-basic_types.html#ft_tag">FT_Tag</a>, _x1 ) << 24 ) | \
( FT_STATIC_BYTE_CAST( <a href="ft2-basic_types.html#ft_tag">FT_Tag</a>, _x2 ) << 16 ) | \
( FT_STATIC_BYTE_CAST( <a href="ft2-basic_types.html#ft_tag">FT_Tag</a>, _x3 ) << 8 ) | \
FT_STATIC_BYTE_CAST( <a href="ft2-basic_types.html#ft_tag">FT_Tag</a>, _x4 ) )
</code></pre></div>
<p>This macro converts four-letter tags that are used to label TrueType tables into an <code>FT_Tag</code> type, to be used within FreeType.</p>
<h4>note</h4>
<p>The produced values <strong>must</strong> be 32-bit integers. Don't redefine this macro.</p>
<hr>
<h2 id="ft_generic">FT_Generic<a class="headerlink" href="#ft_generic" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Generic_
{
<span class="keyword">void</span>* data;
<a href="ft2-basic_types.html#ft_generic_finalizer">FT_Generic_Finalizer</a> finalizer;
} <b>FT_Generic</b>;
</code></pre></div>
<p>Client applications often need to associate their own data to a variety of FreeType core objects. For example, a text layout API might want to associate a glyph cache to a given size object.</p>
<p>Some FreeType object contains a <code>generic</code> field, of type <code>FT_Generic</code>, which usage is left to client applications and font servers.</p>
<p>It can be used to store a pointer to client-specific data, as well as the address of a ‘finalizer’ function, which will be called by FreeType when the object is destroyed (for example, the previous client example would put the address of the glyph cache destructor in the <code>finalizer</code> field).</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="data">data</td><td class="desc">
<p>A typeless pointer to any client-specified data. This field is completely ignored by the FreeType library.</p>
</td></tr>
<tr><td class="val" id="finalizer">finalizer</td><td class="desc">
<p>A pointer to a ‘generic finalizer’ function, which will be called when the object is destroyed. If this field is set to <code>NULL</code>, no code will be called.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_generic_finalizer">FT_Generic_Finalizer<a class="headerlink" href="#ft_generic_finalizer" title="Permanent link">¶</a></h2>
<p>Defined in FT_TYPES_H (freetype/fttypes.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">void</span> (*<b>FT_Generic_Finalizer</b>)( <span class="keyword">void</span>* object );
</code></pre></div>
<p>Describe a function used to destroy the ‘client’ data of any FreeType object. See the description of the <code><a href="ft2-basic_types.html#ft_generic">FT_Generic</a></code> type for details of usage.</p>
<h4>input</h4>
<p>The address of the FreeType object that is under finalization. Its client data is accessed through its <code>generic</code> field.</p>
<hr>
<h2 id="ft_bitmap">FT_Bitmap<a class="headerlink" href="#ft_bitmap" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Bitmap_
{
<span class="keyword">unsigned</span> <span class="keyword">int</span> rows;
<span class="keyword">unsigned</span> <span class="keyword">int</span> width;
<span class="keyword">int</span> pitch;
<span class="keyword">unsigned</span> <span class="keyword">char</span>* buffer;
<span class="keyword">unsigned</span> <span class="keyword">short</span> num_grays;
<span class="keyword">unsigned</span> <span class="keyword">char</span> pixel_mode;
<span class="keyword">unsigned</span> <span class="keyword">char</span> palette_mode;
<span class="keyword">void</span>* palette;
} <b>FT_Bitmap</b>;
</code></pre></div>
<p>A structure used to describe a bitmap or pixmap to the raster. Note that we now manage pixmaps of various depths through the <code>pixel_mode</code> field.</p>
<h4>fields</h4>
<table class="fields">
<tr><td class="val" id="rows">rows</td><td class="desc">
<p>The number of bitmap rows.</p>
</td></tr>
<tr><td class="val" id="width">width</td><td class="desc">
<p>The number of pixels in bitmap row.</p>
</td></tr>
<tr><td class="val" id="pitch">pitch</td><td class="desc">
<p>The pitch's absolute value is the number of bytes taken by one bitmap row, including padding. However, the pitch is positive when the bitmap has a ‘down’ flow, and negative when it has an ‘up’ flow. In all cases, the pitch is an offset to add to a bitmap pointer in order to go down one row.</p>
<p>Note that ‘padding’ means the alignment of a bitmap to a byte border, and FreeType functions normally align to the smallest possible integer value.</p>
<p>For the B/W rasterizer, <code>pitch</code> is always an even number.</p>
<p>To change the pitch of a bitmap (say, to make it a multiple of 4), use <code><a href="ft2-bitmap_handling.html#ft_bitmap_convert">FT_Bitmap_Convert</a></code>. Alternatively, you might use callback functions to directly render to the application's surface; see the file <code>example2.cpp</code> in the tutorial for a demonstration.</p>
</td></tr>
<tr><td class="val" id="buffer">buffer</td><td class="desc">
<p>A typeless pointer to the bitmap buffer. This value should be aligned on 32-bit boundaries in most cases.</p>
</td></tr>
<tr><td class="val" id="num_grays">num_grays</td><td class="desc">
<p>This field is only used with <code><a href="ft2-basic_types.html#ft_pixel_mode">FT_PIXEL_MODE_GRAY</a></code>; it gives the number of gray levels used in the bitmap.</p>
</td></tr>
<tr><td class="val" id="pixel_mode">pixel_mode</td><td class="desc">
<p>The pixel mode, i.e., how pixel bits are stored. See <code><a href="ft2-basic_types.html#ft_pixel_mode">FT_Pixel_Mode</a></code> for possible values.</p>
</td></tr>
<tr><td class="val" id="palette_mode">palette_mode</td><td class="desc">
<p>This field is intended for paletted pixel modes; it indicates how the palette is stored. Not used currently.</p>
</td></tr>
<tr><td class="val" id="palette">palette</td><td class="desc">
<p>A typeless pointer to the bitmap palette; this field is intended for paletted pixel modes. Not used currently.</p>
</td></tr>
</table>
<h4>note</h4>
<p><code>width</code> and <code>rows</code> refer to the <em>physical</em> size of the bitmap, not the <em>logical</em> one. For example, if <code><a href="ft2-basic_types.html#ft_pixel_mode">FT_Pixel_Mode</a></code> is set to <code>FT_PIXEL_MODE_LCD</code>, the logical width is a just a third of the physical one.</p>
<hr>
<h2 id="ft_pixel_mode">FT_Pixel_Mode<a class="headerlink" href="#ft_pixel_mode" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Pixel_Mode_
{
<a href="ft2-basic_types.html#ft_pixel_mode_none">FT_PIXEL_MODE_NONE</a> = 0,
<a href="ft2-basic_types.html#ft_pixel_mode_mono">FT_PIXEL_MODE_MONO</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_gray">FT_PIXEL_MODE_GRAY</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_gray2">FT_PIXEL_MODE_GRAY2</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_gray4">FT_PIXEL_MODE_GRAY4</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_lcd">FT_PIXEL_MODE_LCD</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_lcd_v">FT_PIXEL_MODE_LCD_V</a>,
<a href="ft2-basic_types.html#ft_pixel_mode_bgra">FT_PIXEL_MODE_BGRA</a>,
FT_PIXEL_MODE_MAX /* do not remove */
} <b>FT_Pixel_Mode</b>;
/* these constants are deprecated; use the corresponding `<b>FT_Pixel_Mode</b>` */
/* values instead. */
#<span class="keyword">define</span> ft_pixel_mode_none <a href="ft2-basic_types.html#ft_pixel_mode_none">FT_PIXEL_MODE_NONE</a>
#<span class="keyword">define</span> ft_pixel_mode_mono <a href="ft2-basic_types.html#ft_pixel_mode_mono">FT_PIXEL_MODE_MONO</a>
#<span class="keyword">define</span> ft_pixel_mode_grays <a href="ft2-basic_types.html#ft_pixel_mode_gray">FT_PIXEL_MODE_GRAY</a>
#<span class="keyword">define</span> ft_pixel_mode_pal2 <a href="ft2-basic_types.html#ft_pixel_mode_gray2">FT_PIXEL_MODE_GRAY2</a>
#<span class="keyword">define</span> ft_pixel_mode_pal4 <a href="ft2-basic_types.html#ft_pixel_mode_gray4">FT_PIXEL_MODE_GRAY4</a>
</code></pre></div>
<p>An enumeration type used to describe the format of pixels in a given bitmap. Note that additional formats may be added in the future.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="ft_pixel_mode_none">FT_PIXEL_MODE_NONE</td><td class="desc">
<p>Value 0 is reserved.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_mono">FT_PIXEL_MODE_MONO</td><td class="desc">
<p>A monochrome bitmap, using 1 bit per pixel. Note that pixels are stored in most-significant order (MSB), which means that the left-most pixel in a byte has value 128.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_gray">FT_PIXEL_MODE_GRAY</td><td class="desc">
<p>An 8-bit bitmap, generally used to represent anti-aliased glyph images. Each pixel is stored in one byte. Note that the number of ‘gray’ levels is stored in the <code>num_grays</code> field of the <code><a href="ft2-basic_types.html#ft_bitmap">FT_Bitmap</a></code> structure (it generally is 256).</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_gray2">FT_PIXEL_MODE_GRAY2</td><td class="desc">
<p>A 2-bit per pixel bitmap, used to represent embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_gray4">FT_PIXEL_MODE_GRAY4</td><td class="desc">
<p>A 4-bit per pixel bitmap, representing embedded anti-aliased bitmaps in font files according to the OpenType specification. We haven't found a single font using this format, however.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_lcd">FT_PIXEL_MODE_LCD</td><td class="desc">
<p>An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on LCD displays; the bitmap is three times wider than the original glyph image. See also <code><a href="ft2-glyph_retrieval.html#ft_render_mode">FT_RENDER_MODE_LCD</a></code>.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_lcd_v">FT_PIXEL_MODE_LCD_V</td><td class="desc">
<p>An 8-bit bitmap, representing RGB or BGR decimated glyph images used for display on rotated LCD displays; the bitmap is three times taller than the original glyph image. See also <code><a href="ft2-glyph_retrieval.html#ft_render_mode">FT_RENDER_MODE_LCD_V</a></code>.</p>
</td></tr>
<tr><td class="val" id="ft_pixel_mode_bgra">FT_PIXEL_MODE_BGRA</td><td class="desc">
<p>[Since 2.5] An image with four 8-bit channels per pixel, representing a color image (such as emoticons) with alpha channel. For each pixel, the format is BGRA, which means, the blue channel comes first in memory. The color channels are pre-multiplied and in the sRGB colorspace. For example, full red at half-translucent opacity will be represented as ‘00,00,80,80’, not ‘00,00,FF,80’. See also <code><a href="ft2-glyph_retrieval.html#ft_load_xxx">FT_LOAD_COLOR</a></code>.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_glyph_format">FT_Glyph_Format<a class="headerlink" href="#ft_glyph_format" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Glyph_Format_
{
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_none">FT_GLYPH_FORMAT_NONE</a>, 0, 0, 0, 0 ),
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_composite">FT_GLYPH_FORMAT_COMPOSITE</a>, 'c', 'o', 'm', 'p' ),
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_bitmap">FT_GLYPH_FORMAT_BITMAP</a>, 'b', 'i', 't', 's' ),
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_outline">FT_GLYPH_FORMAT_OUTLINE</a>, 'o', 'u', 't', 'l' ),
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_plotter">FT_GLYPH_FORMAT_PLOTTER</a>, 'p', 'l', 'o', 't' ),
<a href="ft2-basic_types.html#ft_image_tag">FT_IMAGE_TAG</a>( <a href="ft2-basic_types.html#ft_glyph_format_svg">FT_GLYPH_FORMAT_SVG</a>, 'S', 'V', 'G', ' ' )
} <b>FT_Glyph_Format</b>;
/* these constants are deprecated; use the corresponding */
/* `<b>FT_Glyph_Format</b>` values instead. */
#<span class="keyword">define</span> ft_glyph_format_none <a href="ft2-basic_types.html#ft_glyph_format_none">FT_GLYPH_FORMAT_NONE</a>
#<span class="keyword">define</span> ft_glyph_format_composite <a href="ft2-basic_types.html#ft_glyph_format_composite">FT_GLYPH_FORMAT_COMPOSITE</a>
#<span class="keyword">define</span> ft_glyph_format_bitmap <a href="ft2-basic_types.html#ft_glyph_format_bitmap">FT_GLYPH_FORMAT_BITMAP</a>
#<span class="keyword">define</span> ft_glyph_format_outline <a href="ft2-basic_types.html#ft_glyph_format_outline">FT_GLYPH_FORMAT_OUTLINE</a>
#<span class="keyword">define</span> ft_glyph_format_plotter <a href="ft2-basic_types.html#ft_glyph_format_plotter">FT_GLYPH_FORMAT_PLOTTER</a>
</code></pre></div>
<p>An enumeration type used to describe the format of a given glyph image. Note that this version of FreeType only supports two image formats, even though future font drivers will be able to register their own format.</p>
<h4>values</h4>
<table class="fields">
<tr><td class="val" id="ft_glyph_format_none">FT_GLYPH_FORMAT_NONE</td><td class="desc">
<p>The value 0 is reserved.</p>
</td></tr>
<tr><td class="val" id="ft_glyph_format_composite">FT_GLYPH_FORMAT_COMPOSITE</td><td class="desc">
<p>The glyph image is a composite of several other images. This format is <em>only</em> used with <code><a href="ft2-glyph_retrieval.html#ft_load_xxx">FT_LOAD_NO_RECURSE</a></code>, and is used to report compound glyphs (like accented characters).</p>
</td></tr>
<tr><td class="val" id="ft_glyph_format_bitmap">FT_GLYPH_FORMAT_BITMAP</td><td class="desc">
<p>The glyph image is a bitmap, and can be described as an <code><a href="ft2-basic_types.html#ft_bitmap">FT_Bitmap</a></code>. You generally need to access the <code>bitmap</code> field of the <code><a href="ft2-glyph_retrieval.html#ft_glyphslotrec">FT_GlyphSlotRec</a></code> structure to read it.</p>
</td></tr>
<tr><td class="val" id="ft_glyph_format_outline">FT_GLYPH_FORMAT_OUTLINE</td><td class="desc">
<p>The glyph image is a vectorial outline made of line segments and Bezier arcs; it can be described as an <code><a href="ft2-outline_processing.html#ft_outline">FT_Outline</a></code>; you generally want to access the <code>outline</code> field of the <code><a href="ft2-glyph_retrieval.html#ft_glyphslotrec">FT_GlyphSlotRec</a></code> structure to read it.</p>
</td></tr>
<tr><td class="val" id="ft_glyph_format_plotter">FT_GLYPH_FORMAT_PLOTTER</td><td class="desc">
<p>The glyph image is a vectorial path with no inside and outside contours. Some Type 1 fonts, like those in the Hershey family, contain glyphs in this format. These are described as <code><a href="ft2-outline_processing.html#ft_outline">FT_Outline</a></code>, but FreeType isn't currently capable of rendering them correctly.</p>
</td></tr>
<tr><td class="val" id="ft_glyph_format_svg">FT_GLYPH_FORMAT_SVG</td><td class="desc">
<p>[Since 2.12] The glyph is represented by an SVG document in the ‘SVG ’ table.</p>
</td></tr>
</table>
<hr>
<h2 id="ft_image_tag">FT_IMAGE_TAG<a class="headerlink" href="#ft_image_tag" title="Permanent link">¶</a></h2>
<p>Defined in FT_IMAGE_H (freetype/ftimage.h).</p>
<div class = "codehilite"><pre><code>#<span class="keyword">ifndef</span> <b>FT_IMAGE_TAG</b>
#<span class="keyword">define</span> <b>FT_IMAGE_TAG</b>( value, _x1, _x2, _x3, _x4 ) \
value = ( ( FT_STATIC_BYTE_CAST( <span class="keyword">unsigned</span> <span class="keyword">long</span>, _x1 ) << 24 ) | \
( FT_STATIC_BYTE_CAST( <span class="keyword">unsigned</span> <span class="keyword">long</span>, _x2 ) << 16 ) | \
( FT_STATIC_BYTE_CAST( <span class="keyword">unsigned</span> <span class="keyword">long</span>, _x3 ) << 8 ) | \
FT_STATIC_BYTE_CAST( <span class="keyword">unsigned</span> <span class="keyword">long</span>, _x4 ) )
#<span class="keyword">endif</span> /* <b>FT_IMAGE_TAG</b> */
</code></pre></div>
<p>This macro converts four-letter tags to an unsigned long type.</p>
<h4>note</h4>
<p>Since many 16-bit compilers don't like 32-bit enumerations, you should redefine this macro in case of problems to something like this:
<div class="highlight"><pre><span></span><code> #define FT_IMAGE_TAG( value, _x1, _x2, _x3, _x4 ) value
</code></pre></div></p>
<p>to get a simple enumeration without assigning special numbers.</p>
<hr>
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