https://github.com/mozilla/gecko-dev
Tip revision: e3a2113d8ccd1bb11ae2f7f3c7163ad271d0064b authored by Joel Maher on 08 June 2024, 11:33:29 UTC
Bug 1901251 - Adjust moz-icon-blank reftest expectations for new graphics card on windows. r=tnikkel, a=test-only DONTBUILD
Bug 1901251 - Adjust moz-icon-blank reftest expectations for new graphics card on windows. r=tnikkel, a=test-only DONTBUILD
Tip revision: e3a2113
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Size Management
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<p><a href="https://www.freetype.org">FreeType</a> » <a href="../">Docs</a> » <a href="index.html#core-api">Core API</a> » Size Management</p>
<hr />
<h1 id="size-management">Size Management<a class="headerlink" href="#size-management" title="Permanent link">¶</a></h1>
<h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">¶</a></h2>
<p>When creating a new face object (e.g., with <code><a href="ft2-base_interface.html#ft_new_face">FT_New_Face</a></code>), an <code><a href="ft2-base_interface.html#ft_size">FT_Size</a></code> object is automatically created and used to store all pixel-size dependent information, available in the <code>face->size</code> field.</p>
<p>It is however possible to create more sizes for a given face, mostly in order to manage several character pixel sizes of the same font family and style. See <code><a href="ft2-sizes_management.html#ft_new_size">FT_New_Size</a></code> and <code><a href="ft2-sizes_management.html#ft_done_size">FT_Done_Size</a></code>.</p>
<p>Note that <code><a href="ft2-base_interface.html#ft_set_pixel_sizes">FT_Set_Pixel_Sizes</a></code> and <code><a href="ft2-base_interface.html#ft_set_char_size">FT_Set_Char_Size</a></code> only modify the contents of the current ‘active’ size; you thus need to use <code><a href="ft2-sizes_management.html#ft_activate_size">FT_Activate_Size</a></code> to change it.</p>
<p>99% of applications won't need the functions provided here, especially if they use the caching sub-system, so be cautious when using these.</p>
<h2 id="ft_new_size">FT_New_Size<a class="headerlink" href="#ft_new_size" title="Permanent link">¶</a></h2>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
<b>FT_New_Size</b>( <a href="ft2-base_interface.html#ft_face">FT_Face</a> face,
<a href="ft2-base_interface.html#ft_size">FT_Size</a>* size );
</code></pre></div>
<p>Create a new size object from a given face object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="face">face</td><td class="desc">
<p>A handle to a parent face object.</p>
</td></tr>
</table>
<h4>output</h4>
<table class="fields">
<tr><td class="val" id="asize">asize</td><td class="desc">
<p>A handle to a new size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0 means success.</p>
<h4>note</h4>
<p>You need to call <code><a href="ft2-sizes_management.html#ft_activate_size">FT_Activate_Size</a></code> in order to select the new size for upcoming calls to <code><a href="ft2-base_interface.html#ft_set_pixel_sizes">FT_Set_Pixel_Sizes</a></code>, <code><a href="ft2-base_interface.html#ft_set_char_size">FT_Set_Char_Size</a></code>, <code><a href="ft2-base_interface.html#ft_load_glyph">FT_Load_Glyph</a></code>, <code><a href="ft2-base_interface.html#ft_load_char">FT_Load_Char</a></code>, etc.</p>
<hr>
<h2 id="ft_done_size">FT_Done_Size<a class="headerlink" href="#ft_done_size" title="Permanent link">¶</a></h2>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
<b>FT_Done_Size</b>( <a href="ft2-base_interface.html#ft_size">FT_Size</a> size );
</code></pre></div>
<p>Discard a given size object. Note that <code><a href="ft2-base_interface.html#ft_done_face">FT_Done_Face</a></code> automatically discards all size objects allocated with <code><a href="ft2-sizes_management.html#ft_new_size">FT_New_Size</a></code>.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0 means success.</p>
<hr>
<h2 id="ft_activate_size">FT_Activate_Size<a class="headerlink" href="#ft_activate_size" title="Permanent link">¶</a></h2>
<p>Defined in FT_SIZES_H (freetype/ftsizes.h).</p>
<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> )
<b>FT_Activate_Size</b>( <a href="ft2-base_interface.html#ft_size">FT_Size</a> size );
</code></pre></div>
<p>Even though it is possible to create several size objects for a given face (see <code><a href="ft2-sizes_management.html#ft_new_size">FT_New_Size</a></code> for details), functions like <code><a href="ft2-base_interface.html#ft_load_glyph">FT_Load_Glyph</a></code> or <code><a href="ft2-base_interface.html#ft_load_char">FT_Load_Char</a></code> only use the one that has been activated last to determine the ‘current character pixel size’.</p>
<p>This function can be used to ‘activate’ a previously created size object.</p>
<h4>input</h4>
<table class="fields">
<tr><td class="val" id="size">size</td><td class="desc">
<p>A handle to a target size object.</p>
</td></tr>
</table>
<h4>return</h4>
<p>FreeType error code. 0 means success.</p>
<h4>note</h4>
<p>If <code>face</code> is the size's parent face object, this function changes the value of <code>face->size</code> to the input size handle.</p>
<hr>
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