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1 files changed, 30 insertions, 4 deletions
diff --git a/freetype/docs/reference/ft2-auto_hinter.html b/freetype/docs/reference/ft2-auto_hinter.html index 71dede419..d03fb9fbe 100644 --- a/freetype/docs/reference/ft2-auto_hinter.html +++ b/freetype/docs/reference/ft2-auto_hinter.html @@ -3,7 +3,7 @@ <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> -<title>FreeType-2.5.5 API Reference</title> +<title>FreeType-2.6 API Reference</title> <style type="text/css"> a:link { color: #0000EF; } a:visited { color: #51188E; } @@ -100,7 +100,7 @@ <body> <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> -<h1>FreeType-2.5.5 API Reference</h1> +<h1>FreeType-2.6 API Reference</h1> <h1>The auto-hinter</h1> <h2>Synopsis</h2> @@ -108,7 +108,7 @@ <tr><td><a href="#glyph-to-script-map">glyph-to-script-map</a></td><td><a href="#default-script">default-script</a></td></tr> <tr><td><a href="#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_XXX</a></td><td><a href="#increase-x-height">increase-x-height</a></td></tr> <tr><td><a href="#FT_Prop_GlyphToScriptMap">FT_Prop_GlyphToScriptMap</a></td><td><a href="#FT_Prop_IncreaseXHeight">FT_Prop_IncreaseXHeight</a></td></tr> -<tr><td><a href="#fallback-script">fallback-script</a></td><td></td></tr> +<tr><td><a href="#fallback-script">fallback-script</a></td><td><a href="#warping">warping</a></td></tr> </table> @@ -301,7 +301,7 @@ <h3 id="default-script">default-script</h3> <p><b>Experimental</b> <b>only</b></p> -<p>If Freetype gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a ‘dlig’ feature, containing the combination of the characters ‘T’, ‘E’, and ‘L’ to form a ‘TEL’ ligature.</p> +<p>If FreeType gets compiled with FT_CONFIG_OPTION_USE_HARFBUZZ to make the HarfBuzz library access OpenType features for getting better glyph coverages, this property sets the (auto-fitter) script to be used for the default (OpenType) script data of a font's GSUB table. Features for the default script are intended for all scripts not explicitly handled in GSUB; an example is a ‘dlig’ feature, containing the combination of the characters ‘T’, ‘E’, and ‘L’ to form a ‘TEL’ ligature.</p> <p>By default, this is <a href="ft2-auto_hinter.html#FT_AUTOHINTER_SCRIPT_XXX">FT_AUTOHINTER_SCRIPT_LATIN</a>. Using the ‘default-script’ property, this default value can be changed.</p> <pre class="colored"> FT_Library library; @@ -366,5 +366,31 @@ <hr> <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> +<div class="section"> +<h3 id="warping">warping</h3> + +<p><b>Experimental</b> <b>only</b></p> +<p>If FreeType gets compiled with option AF_CONFIG_OPTION_USE_WARPER to activate the warp hinting code in the auto-hinter, this property switches warping on and off.</p> +<p>Warping only works in ‘light’ auto-hinting mode. The idea of the code is to slightly scale and shift a glyph along the non-hinted dimension (which is usually the horizontal axis) so that as much of its segments are aligned (more or less) to the grid. To find out a glyph's optimal scaling and shifting value, various parameter combinations are tried and scored.</p> +<p>By default, warping is off. The example below shows how to switch on warping (omitting the error handling).</p> +<pre class="colored"> + FT_Library library; + FT_Bool warping = 1; + + + FT_Init_FreeType( &library ); + + FT_Property_Set( library, "autofitter", + "warping", &warping ); +</pre> + +<h4>note</h4> +<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p> +<p>The warping code can also change advance widths. Have a look at the ‘lsb_delta’ and ‘rsb_delta’ fields in the <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> structure for details on improving inter-glyph distances while rendering.</p> +<p>Since warping is a global property of the auto-hinter it is best to change its value before rendering any face. Otherwise, you should reload all faces that get auto-hinted in ‘light’ hinting mode.</p> + +<hr> +<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> + </body> </html> |