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author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2020-05-10 06:48:17 +0000 |
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committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2020-05-10 06:48:17 +0000 |
commit | 1ebd3ac2252d05a85495dbed4d2131b9dcc068e9 (patch) | |
tree | ff4d9c3b0635402e0df6ae75b4ce66364dfc7171 /Build/source/libs/freetype2/freetype-src/docs/reference/ft2-color_management.html | |
parent | 3fa60b71f26b9166920881009ec8a0dffbda13c3 (diff) |
freetype2 2.10.2
git-svn-id: svn://tug.org/texlive/trunk@55087 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/freetype2/freetype-src/docs/reference/ft2-color_management.html')
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diff --git a/Build/source/libs/freetype2/freetype-src/docs/reference/ft2-color_management.html b/Build/source/libs/freetype2/freetype-src/docs/reference/ft2-color_management.html new file mode 100644 index 00000000000..a447ae305dc --- /dev/null +++ b/Build/source/libs/freetype2/freetype-src/docs/reference/ft2-color_management.html @@ -0,0 +1,1457 @@ + + + + +<!doctype html> +<html lang="en" class="no-js"> + <head> + + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width,initial-scale=1"> + <meta http-equiv="x-ua-compatible" content="ie=edge"> + + <meta name="description" content="API Reference Documentation for FreeType-2.10.2"> + + + + <meta name="author" content="FreeType Contributors"> + + + <meta name="lang:clipboard.copy" content="Copy to clipboard"> + + <meta name="lang:clipboard.copied" content="Copied to clipboard"> + + <meta name="lang:search.language" content="en"> + + <meta name="lang:search.pipeline.stopwords" content="True"> + + <meta 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+ <nav class="md-header-nav md-grid"> + <div class="md-flex"> + <div class="md-flex__cell md-flex__cell--shrink"> + <a href="." title="FreeType-2.10.2 API Reference" aria-label="FreeType-2.10.2 API Reference" class="md-header-nav__button md-logo"> + + <img alt="logo" src="images/favico.ico" width="24" height="24"> + + </a> + </div> + <div class="md-flex__cell md-flex__cell--shrink"> + <label class="md-icon md-icon--menu md-header-nav__button" for="__drawer"></label> + </div> + <div class="md-flex__cell md-flex__cell--stretch"> + <div class="md-flex__ellipsis md-header-nav__title" data-md-component="title"> + + <span class="md-header-nav__topic"> + FreeType-2.10.2 API Reference + </span> + <span class="md-header-nav__topic"> + + Glyph Color Management + + </span> + + </div> + </div> + <div class="md-flex__cell md-flex__cell--shrink"> + + <label class="md-icon md-icon--search md-header-nav__button" for="__search"></label> + +<div class="md-search" data-md-component="search" 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type="checkbox" id="nav-3"> + + <label class="md-nav__link" for="nav-3"> + General Remarks + </label> + <nav class="md-nav" data-md-component="collapsible" data-md-level="1"> + <label class="md-nav__title" for="nav-3"> + General Remarks + </label> + <ul class="md-nav__list" data-md-scrollfix> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-header_inclusion.html" title="FreeType's header inclusion scheme" class="md-nav__link"> + FreeType's header inclusion scheme + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-user_allocation.html" title="User allocation" class="md-nav__link"> + User allocation + </a> + </li> + + + </ul> + </nav> + </li> + + + + + + + + + + <li class="md-nav__item md-nav__item--active md-nav__item--nested"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="nav-4" type="checkbox" id="nav-4" checked> + + <label class="md-nav__link" for="nav-4"> + Core API + </label> + <nav class="md-nav" data-md-component="collapsible" data-md-level="1"> + <label class="md-nav__title" for="nav-4"> + Core API + </label> + <ul class="md-nav__list" data-md-scrollfix> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-version.html" title="FreeType Version" class="md-nav__link"> + FreeType Version + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-basic_types.html" title="Basic Data Types" class="md-nav__link"> + Basic Data Types + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-base_interface.html" title="Base Interface" class="md-nav__link"> + Base Interface + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-glyph_variants.html" title="Unicode Variation Sequences" class="md-nav__link"> + Unicode Variation Sequences + </a> + </li> + + + + + + + + + + <li class="md-nav__item md-nav__item--active"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="toc" type="checkbox" id="__toc"> + + + + + <label class="md-nav__link md-nav__link--active" for="__toc"> + Glyph Color Management + </label> + + <a href="ft2-color_management.html" title="Glyph Color Management" class="md-nav__link md-nav__link--active"> + Glyph Color Management + </a> + + +<nav class="md-nav md-nav--secondary"> + + + + + + <label class="md-nav__title" for="__toc">Table of contents</label> + <ul class="md-nav__list" data-md-scrollfix> + + <li class="md-nav__item"> + <a href="#synopsis" class="md-nav__link"> + Synopsis + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_color" class="md-nav__link"> + FT_Color + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_xxx" class="md-nav__link"> + FT_PALETTE_XXX + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_data" class="md-nav__link"> + FT_Palette_Data + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_data_get" class="md-nav__link"> + FT_Palette_Data_Get + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_select" class="md-nav__link"> + FT_Palette_Select + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_set_foreground_color" class="md-nav__link"> + FT_Palette_Set_Foreground_Color + </a> + +</li> + + + + + + </ul> + +</nav> + + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-layer_management.html" title="Glyph Layer Management" class="md-nav__link"> + Glyph Layer Management + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-glyph_management.html" title="Glyph Management" class="md-nav__link"> + Glyph Management + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-mac_specific.html" title="Mac Specific Interface" class="md-nav__link"> + Mac Specific Interface + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-sizes_management.html" title="Size Management" class="md-nav__link"> + Size Management + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-header_file_macros.html" title="Header File Macros" class="md-nav__link"> + Header File Macros + </a> + </li> + + + </ul> + </nav> + </li> + + + + + + + + <li class="md-nav__item md-nav__item--nested"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="nav-5" type="checkbox" id="nav-5"> + + <label class="md-nav__link" for="nav-5"> + Format-Specific API + </label> + <nav class="md-nav" data-md-component="collapsible" data-md-level="1"> + <label class="md-nav__title" for="nav-5"> + Format-Specific API + </label> + <ul class="md-nav__list" data-md-scrollfix> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-multiple_masters.html" title="Multiple Masters" class="md-nav__link"> + Multiple Masters + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-truetype_tables.html" title="TrueType Tables" class="md-nav__link"> + TrueType Tables + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-type1_tables.html" title="Type 1 Tables" class="md-nav__link"> + Type 1 Tables + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-sfnt_names.html" title="SFNT Names" class="md-nav__link"> + SFNT Names + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-bdf_fonts.html" title="BDF and PCF Files" class="md-nav__link"> + BDF and PCF Files + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-cid_fonts.html" title="CID Fonts" class="md-nav__link"> + CID Fonts + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-pfr_fonts.html" title="PFR Fonts" class="md-nav__link"> + PFR Fonts + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-winfnt_fonts.html" title="Window FNT Files" class="md-nav__link"> + Window FNT Files + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-font_formats.html" title="Font Formats" class="md-nav__link"> + Font Formats + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-gasp_table.html" title="Gasp Table" class="md-nav__link"> + Gasp Table + </a> + </li> + + + </ul> + </nav> + </li> + + + + + + + + <li class="md-nav__item md-nav__item--nested"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="nav-6" type="checkbox" id="nav-6"> + + <label class="md-nav__link" for="nav-6"> + Controlling FreeType Modules + </label> + <nav class="md-nav" data-md-component="collapsible" data-md-level="1"> + <label class="md-nav__title" for="nav-6"> + Controlling FreeType Modules + </label> + <ul class="md-nav__list" data-md-scrollfix> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-auto_hinter.html" title="The auto-hinter" class="md-nav__link"> + The auto-hinter + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-cff_driver.html" title="The CFF driver" class="md-nav__link"> + The CFF driver + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-t1_cid_driver.html" title="The Type 1 and CID drivers" class="md-nav__link"> + The Type 1 and CID drivers + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-tt_driver.html" title="The TrueType driver" class="md-nav__link"> + The TrueType driver + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-pcf_driver.html" title="The PCF driver" class="md-nav__link"> + The PCF driver + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-properties.html" title="Driver properties" class="md-nav__link"> + Driver properties + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-parameter_tags.html" title="Parameter Tags" class="md-nav__link"> + Parameter Tags + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-lcd_rendering.html" title="Subpixel Rendering" class="md-nav__link"> + Subpixel Rendering + </a> + </li> + + + </ul> + </nav> + </li> + + + + + + + + <li class="md-nav__item md-nav__item--nested"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="nav-7" type="checkbox" id="nav-7"> + + <label class="md-nav__link" for="nav-7"> + 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class="md-nav__item"> + <a href="ft2-list_processing.html" title="List Processing" class="md-nav__link"> + List Processing + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-outline_processing.html" title="Outline Processing" class="md-nav__link"> + Outline Processing + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-quick_advance.html" title="Quick retrieval of advance values" class="md-nav__link"> + Quick retrieval of advance values + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-bitmap_handling.html" title="Bitmap Handling" class="md-nav__link"> + Bitmap Handling + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-raster.html" title="Scanline Converter" class="md-nav__link"> + Scanline Converter + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-glyph_stroker.html" title="Glyph Stroker" class="md-nav__link"> + Glyph Stroker + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-system_interface.html" title="System Interface" class="md-nav__link"> + System Interface + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-module_management.html" title="Module Management" class="md-nav__link"> + Module Management + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-gzip.html" title="GZIP Streams" class="md-nav__link"> + GZIP Streams + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-lzw.html" title="LZW Streams" class="md-nav__link"> + LZW Streams + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-bzip2.html" title="BZIP2 Streams" class="md-nav__link"> + BZIP2 Streams + </a> + </li> + + + </ul> + </nav> + </li> + + + + + + + + <li class="md-nav__item md-nav__item--nested"> + + <input class="md-toggle md-nav__toggle" data-md-toggle="nav-9" type="checkbox" id="nav-9"> + + <label class="md-nav__link" for="nav-9"> + Error Codes + </label> + <nav 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class="md-nav__item"> + <a href="ft2-gx_validation.html" title="TrueTypeGX/AAT Validation" class="md-nav__link"> + TrueTypeGX/AAT Validation + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-incremental.html" title="Incremental Loading" class="md-nav__link"> + Incremental Loading + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-truetype_engine.html" title="The TrueType Engine" class="md-nav__link"> + The TrueType Engine + </a> + </li> + + + + + + + + <li class="md-nav__item"> + <a href="ft2-ot_validation.html" title="OpenType Validation" class="md-nav__link"> + OpenType Validation + </a> + </li> + + + </ul> + </nav> + </li> + + + </ul> +</nav> + </div> + </div> + </div> + + + <div class="md-sidebar md-sidebar--secondary" data-md-component="toc"> + <div class="md-sidebar__scrollwrap"> + <div class="md-sidebar__inner"> + +<nav class="md-nav md-nav--secondary"> + + + + + + <label class="md-nav__title" for="__toc">Table of contents</label> + <ul class="md-nav__list" data-md-scrollfix> + + <li class="md-nav__item"> + <a href="#synopsis" class="md-nav__link"> + Synopsis + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_color" class="md-nav__link"> + FT_Color + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_xxx" class="md-nav__link"> + FT_PALETTE_XXX + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_data" class="md-nav__link"> + FT_Palette_Data + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_data_get" class="md-nav__link"> + FT_Palette_Data_Get + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_select" class="md-nav__link"> + FT_Palette_Select + </a> + +</li> + + <li class="md-nav__item"> + <a href="#ft_palette_set_foreground_color" class="md-nav__link"> + FT_Palette_Set_Foreground_Color + </a> + +</li> + + + + + + </ul> + +</nav> + </div> + </div> + </div> + + + <div class="md-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> » Glyph Color Management</p> +<hr /> +<h1 id="glyph-color-management">Glyph Color Management<a class="headerlink" href="#glyph-color-management" title="Permanent link">¶</a></h1> +<h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">¶</a></h2> +<p>The functions described here allow access and manipulation of color palette entries in OpenType's ‘CPAL’ tables.</p> +<h2 id="ft_color">FT_Color<a class="headerlink" href="#ft_color" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Color_ + { + <a href="ft2-basic_types.html#ft_byte">FT_Byte</a> blue; + <a href="ft2-basic_types.html#ft_byte">FT_Byte</a> green; + <a href="ft2-basic_types.html#ft_byte">FT_Byte</a> red; + <a href="ft2-basic_types.html#ft_byte">FT_Byte</a> alpha; + + } <b>FT_Color</b>; +</code></pre></div> + +<p>This structure models a BGRA color value of a ‘CPAL’ palette entry.</p> +<p>The used color space is sRGB; the colors are not pre-multiplied, and alpha values must be explicitly set.</p> +<h4>fields</h4> + +<table class="fields"> +<tr><td class="val" id="blue">blue</td><td class="desc"> +<p>Blue value.</p> +</td></tr> +<tr><td class="val" id="green">green</td><td class="desc"> +<p>Green value.</p> +</td></tr> +<tr><td class="val" id="red">red</td><td class="desc"> +<p>Red value.</p> +</td></tr> +<tr><td class="val" id="alpha">alpha</td><td class="desc"> +<p>Alpha value, giving the red, green, and blue color's opacity.</p> +</td></tr> +</table> + +<h4>since</h4> + +<p>2.10</p> +<hr> + +<h2 id="ft_palette_xxx">FT_PALETTE_XXX<a class="headerlink" href="#ft_palette_xxx" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code>#<span class="keyword">define</span> <a href="ft2-color_management.html#ft_palette_for_light_background">FT_PALETTE_FOR_LIGHT_BACKGROUND</a> 0x01 +#<span class="keyword">define</span> <a href="ft2-color_management.html#ft_palette_for_dark_background">FT_PALETTE_FOR_DARK_BACKGROUND</a> 0x02 +</code></pre></div> + +<p>A list of bit field constants used in the <code>palette_flags</code> array of the <code><a href="ft2-color_management.html#ft_palette_data">FT_Palette_Data</a></code> structure to indicate for which background a palette with a given index is usable.</p> +<h4>values</h4> + +<table class="fields long"> +<tr><td class="val" id="ft_palette_for_light_background">FT_PALETTE_FOR_LIGHT_BACKGROUND</td><td class="desc"> +<p>The palette is appropriate to use when displaying the font on a light background such as white.</p> +</td></tr> +<tr><td class="val" id="ft_palette_for_dark_background">FT_PALETTE_FOR_DARK_BACKGROUND</td><td class="desc"> +<p>The palette is appropriate to use when displaying the font on a dark background such as black.</p> +</td></tr> +</table> + +<h4>since</h4> + +<p>2.10</p> +<hr> + +<h2 id="ft_palette_data">FT_Palette_Data<a class="headerlink" href="#ft_palette_data" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code> <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Palette_Data_ { + <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a> num_palettes; + <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a>* palette_name_ids; + <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a>* palette_flags; + + <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a> num_palette_entries; + <span class="keyword">const</span> <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a>* palette_entry_name_ids; + + } <b>FT_Palette_Data</b>; +</code></pre></div> + +<p>This structure holds the data of the ‘CPAL’ table.</p> +<h4>fields</h4> + +<table class="fields"> +<tr><td class="val" id="num_palettes">num_palettes</td><td class="desc"> +<p>The number of palettes.</p> +</td></tr> +<tr><td class="val" id="palette_name_ids">palette_name_ids</td><td class="desc"> +<p>An optional read-only array of palette name IDs with <code>num_palettes</code> elements, corresponding to entries like ‘dark’ or ‘light’ in the font's ‘name’ table.</p> +<p>An empty name ID in the ‘CPAL’ table gets represented as value 0xFFFF.</p> +<p><code>NULL</code> if the font's ‘CPAL’ table doesn't contain appropriate data.</p> +</td></tr> +<tr><td class="val" id="palette_flags">palette_flags</td><td class="desc"> +<p>An optional read-only array of palette flags with <code>num_palettes</code> elements. Possible values are an ORed combination of <code><a href="ft2-color_management.html#ft_palette_xxx">FT_PALETTE_FOR_LIGHT_BACKGROUND</a></code> and <code><a href="ft2-color_management.html#ft_palette_xxx">FT_PALETTE_FOR_DARK_BACKGROUND</a></code>.</p> +<p><code>NULL</code> if the font's ‘CPAL’ table doesn't contain appropriate data.</p> +</td></tr> +<tr><td class="val" id="num_palette_entries">num_palette_entries</td><td class="desc"> +<p>The number of entries in a single palette. All palettes have the same size.</p> +</td></tr> +<tr><td class="val" id="palette_entry_name_ids">palette_entry_name_ids</td><td class="desc"> +<p>An optional read-only array of palette entry name IDs with <code>num_palette_entries</code>. In each palette, entries with the same index have the same function. For example, index 0 might correspond to string ‘outline’ in the font's ‘name’ table to indicate that this palette entry is used for outlines, index 1 might correspond to ‘fill’ to indicate the filling color palette entry, etc.</p> +<p>An empty entry name ID in the ‘CPAL’ table gets represented as value 0xFFFF.</p> +<p><code>NULL</code> if the font's ‘CPAL’ table doesn't contain appropriate data.</p> +</td></tr> +</table> + +<h4>note</h4> + +<p>Use function <code><a href="ft2-sfnt_names.html#ft_get_sfnt_name">FT_Get_Sfnt_Name</a></code> to map name IDs and entry name IDs to name strings.</p> +<p>Use function <code><a href="ft2-color_management.html#ft_palette_select">FT_Palette_Select</a></code> to get the colors associated with a palette entry.</p> +<h4>since</h4> + +<p>2.10</p> +<hr> + +<h2 id="ft_palette_data_get">FT_Palette_Data_Get<a class="headerlink" href="#ft_palette_data_get" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> ) + <b>FT_Palette_Data_Get</b>( <a href="ft2-base_interface.html#ft_face">FT_Face</a> face, + <a href="ft2-color_management.html#ft_palette_data">FT_Palette_Data</a> *apalette ); +</code></pre></div> + +<p>Retrieve the face's color palette data.</p> +<h4>input</h4> + +<table class="fields"> +<tr><td class="val" id="face">face</td><td class="desc"> +<p>The source face handle.</p> +</td></tr> +</table> + +<h4>output</h4> + +<table class="fields"> +<tr><td class="val" id="apalette">apalette</td><td class="desc"> +<p>A pointer to an <code><a href="ft2-color_management.html#ft_palette_data">FT_Palette_Data</a></code> structure.</p> +</td></tr> +</table> + +<h4>return</h4> + +<p>FreeType error code. 0 means success.</p> +<h4>note</h4> + +<p>All arrays in the returned <code><a href="ft2-color_management.html#ft_palette_data">FT_Palette_Data</a></code> structure are read-only.</p> +<p>This function always returns an error if the config macro <code>TT_CONFIG_OPTION_COLOR_LAYERS</code> is not defined in <code>ftoption.h</code>.</p> +<h4>since</h4> + +<p>2.10</p> +<hr> + +<h2 id="ft_palette_select">FT_Palette_Select<a class="headerlink" href="#ft_palette_select" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> ) + <b>FT_Palette_Select</b>( <a href="ft2-base_interface.html#ft_face">FT_Face</a> face, + <a href="ft2-basic_types.html#ft_ushort">FT_UShort</a> palette_index, + <a href="ft2-color_management.html#ft_color">FT_Color</a>* *apalette ); +</code></pre></div> + +<p>This function has two purposes.</p> +<p>(1) It activates a palette for rendering color glyphs, and</p> +<p>(2) it retrieves all (unmodified) color entries of this palette. This function returns a read-write array, which means that a calling application can modify the palette entries on demand.</p> +<p>A corollary of (2) is that calling the function, then modifying some values, then calling the function again with the same arguments resets all color entries to the original ‘CPAL’ values; all user modifications are lost.</p> +<h4>input</h4> + +<table class="fields"> +<tr><td class="val" id="face">face</td><td class="desc"> +<p>The source face handle.</p> +</td></tr> +<tr><td class="val" id="palette_index">palette_index</td><td class="desc"> +<p>The palette index.</p> +</td></tr> +</table> + +<h4>output</h4> + +<table class="fields"> +<tr><td class="val" id="apalette">apalette</td><td class="desc"> +<p>An array of color entries for a palette with index <code>palette_index</code>, having <code>num_palette_entries</code> elements (as found in the <code>FT_Palette_Data</code> structure). If <code>apalette</code> is set to <code>NULL</code>, no array gets returned (and no color entries can be modified).</p> +<p>In case the font doesn't support color palettes, <code>NULL</code> is returned.</p> +</td></tr> +</table> + +<h4>return</h4> + +<p>FreeType error code. 0 means success.</p> +<h4>note</h4> + +<p>The array pointed to by <code>apalette_entries</code> is owned and managed by FreeType.</p> +<p>This function always returns an error if the config macro <code>TT_CONFIG_OPTION_COLOR_LAYERS</code> is not defined in <code>ftoption.h</code>.</p> +<h4>since</h4> + +<p>2.10</p> +<hr> + +<h2 id="ft_palette_set_foreground_color">FT_Palette_Set_Foreground_Color<a class="headerlink" href="#ft_palette_set_foreground_color" title="Permanent link">¶</a></h2> +<p>Defined in FT_COLOR_H (freetype/ftcolor.h).</p> +<div class = "codehilite"><pre><code> FT_EXPORT( <a href="ft2-basic_types.html#ft_error">FT_Error</a> ) + <b>FT_Palette_Set_Foreground_Color</b>( <a href="ft2-base_interface.html#ft_face">FT_Face</a> face, + <a href="ft2-color_management.html#ft_color">FT_Color</a> foreground_color ); +</code></pre></div> + +<p>‘COLR’ uses palette index 0xFFFF to indicate a ‘text foreground color’. This function sets this value.</p> +<h4>input</h4> + +<table class="fields"> +<tr><td class="val" id="face">face</td><td class="desc"> +<p>The source face handle.</p> +</td></tr> +<tr><td class="val" id="foreground_color">foreground_color</td><td class="desc"> +<p>An <code>FT_Color</code> structure to define the text foreground color.</p> +</td></tr> +</table> + +<h4>return</h4> + +<p>FreeType error code. 0 means success.</p> +<h4>note</h4> + +<p>If this function isn't called, the text foreground color is set to white opaque (BGRA value 0xFFFFFFFF) if <code><a href="ft2-color_management.html#ft_palette_xxx">FT_PALETTE_FOR_DARK_BACKGROUND</a></code> is present for the current palette, and black opaque (BGRA value 0x000000FF) otherwise, including the case that no palette types are available in the ‘CPAL’ table.</p> +<p>This function always returns an error if the config macro <code>TT_CONFIG_OPTION_COLOR_LAYERS</code> is not defined in <code>ftoption.h</code>.</p> +<h4>since</h4> + +<p>2.10</p> +<hr> + + + + + + + + + + + </article> + </div> + </div> + </main> + + +<footer class="md-footer"> + + <div class="md-footer-nav"> + <nav class="md-footer-nav__inner md-grid"> + + <a href="ft2-glyph_variants.html" title="Unicode Variation Sequences" class="md-flex md-footer-nav__link md-footer-nav__link--prev" rel="prev"> + <div class="md-flex__cell md-flex__cell--shrink"> + <i class="md-icon md-icon--arrow-back md-footer-nav__button"></i> + </div> + <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"> + <span class="md-flex__ellipsis"> + <span class="md-footer-nav__direction"> + Previous + </span> + Unicode Variation Sequences + </span> + </div> + </a> + + + <a href="ft2-layer_management.html" title="Glyph Layer Management" class="md-flex md-footer-nav__link md-footer-nav__link--next" rel="next"> + <div class="md-flex__cell md-flex__cell--stretch md-footer-nav__title"> + <span class="md-flex__ellipsis"> + <span class="md-footer-nav__direction"> + Next + </span> + Glyph Layer Management + </span> + </div> + <div class="md-flex__cell md-flex__cell--shrink"> + <i class="md-icon md-icon--arrow-forward md-footer-nav__button"></i> + </div> + </a> + + </nav> + </div> + + <div class="md-footer-meta md-typeset"> + <div class="md-footer-meta__inner md-grid"> + <div class="md-footer-copyright"> + + <div class="md-footer-copyright__highlight"> + Copyright 2020 <a href = "https://www.freetype.org/license.html">The FreeType Project</a>. + </div> + + powered by + <a href="https://www.mkdocs.org" target="_blank" rel="noopener">MkDocs</a> + and + <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener"> + Material for MkDocs</a> + </div> + + </div> + </div> +</footer> + + </div> + + <script src="assets/javascripts/application.c33a9706.js"></script> + + <script>app.initialize({version:"1.1",url:{base:"."}})</script> + + <script src="javascripts/extra.js"></script> + + + </body> +</html>
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