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1 files changed, 409 insertions, 233 deletions
diff --git a/modules/freetype2/docs/reference/ft2-base_interface.html b/modules/freetype2/docs/reference/ft2-base_interface.html index e4d876cbc..3cedbcc94 100644 --- a/modules/freetype2/docs/reference/ft2-base_interface.html +++ b/modules/freetype2/docs/reference/ft2-base_interface.html @@ -1,9 +1,9 @@ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" -"http://www.w3.org/TR/html4/loose.dtd"> +"https://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> -<title>FreeType-2.7.1 API Reference</title> +<title>FreeType-2.9.1 API Reference</title> <style type="text/css"> a:link { color: #0000EF; } a:visited { color: #51188E; } @@ -100,58 +100,59 @@ <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-2.7.1 API Reference</h1> +<h1>FreeType-2.9.1 API Reference</h1> <h1 id="base_interface">Base Interface</h1> <h2>Synopsis</h2> <table class="synopsis"> -<tr><td><a href="#FT_Library">FT_Library</a></td><td><a href="#FT_SubGlyph">FT_SubGlyph</a></td><td> </td></tr> -<tr><td><a href="#FT_Face">FT_Face</a></td><td> </td><td><a href="#FT_LOAD_VERTICAL_LAYOUT">FT_LOAD_VERTICAL_LAYOUT</a></td></tr> -<tr><td><a href="#FT_Size">FT_Size</a></td><td><a href="#FT_Bitmap_Size">FT_Bitmap_Size</a></td><td><a href="#FT_LOAD_IGNORE_TRANSFORM">FT_LOAD_IGNORE_TRANSFORM</a></td></tr> -<tr><td><a href="#FT_GlyphSlot">FT_GlyphSlot</a></td><td> </td><td><a href="#FT_LOAD_FORCE_AUTOHINT">FT_LOAD_FORCE_AUTOHINT</a></td></tr> -<tr><td><a href="#FT_CharMap">FT_CharMap</a></td><td><a href="#FT_Init_FreeType">FT_Init_FreeType</a></td><td><a href="#FT_LOAD_NO_RECURSE">FT_LOAD_NO_RECURSE</a></td></tr> -<tr><td><a href="#FT_Encoding">FT_Encoding</a></td><td><a href="#FT_Done_FreeType">FT_Done_FreeType</a></td><td><a href="#FT_LOAD_PEDANTIC">FT_LOAD_PEDANTIC</a></td></tr> -<tr><td><a href="#FT_ENC_TAG">FT_ENC_TAG</a></td><td> </td><td> </td></tr> +<tr><td><a href="#FT_Library">FT_Library</a></td><td><a href="#FT_GlyphSlotRec">FT_GlyphSlotRec</a></td><td><a href="#FT_LOAD_NO_AUTOHINT">FT_LOAD_NO_AUTOHINT</a></td></tr> +<tr><td><a href="#FT_Face">FT_Face</a></td><td><a href="#FT_Glyph_Metrics">FT_Glyph_Metrics</a></td><td><a href="#FT_LOAD_COLOR">FT_LOAD_COLOR</a></td></tr> +<tr><td><a href="#FT_Size">FT_Size</a></td><td><a href="#FT_SubGlyph">FT_SubGlyph</a></td><td> </td></tr> +<tr><td><a href="#FT_GlyphSlot">FT_GlyphSlot</a></td><td> </td><td><a href="#FT_LOAD_VERTICAL_LAYOUT">FT_LOAD_VERTICAL_LAYOUT</a></td></tr> +<tr><td><a href="#FT_CharMap">FT_CharMap</a></td><td><a href="#FT_Bitmap_Size">FT_Bitmap_Size</a></td><td><a href="#FT_LOAD_IGNORE_TRANSFORM">FT_LOAD_IGNORE_TRANSFORM</a></td></tr> +<tr><td><a href="#FT_Encoding">FT_Encoding</a></td><td> </td><td><a href="#FT_LOAD_FORCE_AUTOHINT">FT_LOAD_FORCE_AUTOHINT</a></td></tr> +<tr><td><a href="#FT_ENC_TAG">FT_ENC_TAG</a></td><td><a href="#FT_Init_FreeType">FT_Init_FreeType</a></td><td><a href="#FT_LOAD_NO_RECURSE">FT_LOAD_NO_RECURSE</a></td></tr> +<tr><td> </td><td><a href="#FT_Done_FreeType">FT_Done_FreeType</a></td><td><a href="#FT_LOAD_PEDANTIC">FT_LOAD_PEDANTIC</a></td></tr> +<tr><td><a href="#FT_FaceRec">FT_FaceRec</a></td><td> </td><td> </td></tr> <tr><td> </td><td><a href="#FT_New_Face">FT_New_Face</a></td><td><a href="#FT_LOAD_TARGET_NORMAL">FT_LOAD_TARGET_NORMAL</a></td></tr> -<tr><td><a href="#FT_FaceRec">FT_FaceRec</a></td><td><a href="#FT_Done_Face">FT_Done_Face</a></td><td><a href="#FT_LOAD_TARGET_LIGHT">FT_LOAD_TARGET_LIGHT</a></td></tr> -<tr><td> </td><td><a href="#FT_Reference_Face">FT_Reference_Face</a></td><td><a href="#FT_LOAD_TARGET_MONO">FT_LOAD_TARGET_MONO</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_SCALABLE">FT_FACE_FLAG_SCALABLE</a></td><td><a href="#FT_New_Memory_Face">FT_New_Memory_Face</a></td><td><a href="#FT_LOAD_TARGET_LCD">FT_LOAD_TARGET_LCD</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_FIXED_SIZES">FT_FACE_FLAG_FIXED_SIZES</a></td><td><a href="#FT_Open_Face">FT_Open_Face</a></td><td><a href="#FT_LOAD_TARGET_LCD_V">FT_LOAD_TARGET_LCD_V</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_FIXED_WIDTH">FT_FACE_FLAG_FIXED_WIDTH</a></td><td><a href="#FT_Open_Args">FT_Open_Args</a></td><td> </td></tr> -<tr><td><a href="#FT_FACE_FLAG_HORIZONTAL">FT_FACE_FLAG_HORIZONTAL</a></td><td><a href="#FT_Parameter">FT_Parameter</a></td><td><a href="#FT_LOAD_TARGET_MODE">FT_LOAD_TARGET_MODE</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_VERTICAL">FT_FACE_FLAG_VERTICAL</a></td><td><a href="#FT_Attach_File">FT_Attach_File</a></td><td> </td></tr> -<tr><td><a href="#FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</a></td><td><a href="#FT_Attach_Stream">FT_Attach_Stream</a></td><td><a href="#FT_Render_Glyph">FT_Render_Glyph</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_SFNT">FT_FACE_FLAG_SFNT</a></td><td> </td><td><a href="#FT_Render_Mode">FT_Render_Mode</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_CID_KEYED">FT_FACE_FLAG_CID_KEYED</a></td><td><a href="#FT_Set_Char_Size">FT_Set_Char_Size</a></td><td><a href="#FT_Get_Kerning">FT_Get_Kerning</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_TRICKY">FT_FACE_FLAG_TRICKY</a></td><td><a href="#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a></td><td><a href="#FT_Kerning_Mode">FT_Kerning_Mode</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_KERNING">FT_FACE_FLAG_KERNING</a></td><td><a href="#FT_Request_Size">FT_Request_Size</a></td><td><a href="#FT_Get_Track_Kerning">FT_Get_Track_Kerning</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_MULTIPLE_MASTERS">FT_FACE_FLAG_MULTIPLE_MASTERS</a></td><td><a href="#FT_Select_Size">FT_Select_Size</a></td><td><a href="#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_GLYPH_NAMES">FT_FACE_FLAG_GLYPH_NAMES</a></td><td><a href="#FT_Size_Request_Type">FT_Size_Request_Type</a></td><td><a href="#FT_Get_Postscript_Name">FT_Get_Postscript_Name</a></td></tr> -<tr><td><a href="#FT_FACE_FLAG_EXTERNAL_STREAM">FT_FACE_FLAG_EXTERNAL_STREAM</a></td><td><a href="#FT_Size_RequestRec">FT_Size_RequestRec</a></td><td> </td></tr> -<tr><td><a href="#FT_FACE_FLAG_HINTER">FT_FACE_FLAG_HINTER</a></td><td><a href="#FT_Size_Request">FT_Size_Request</a></td><td><a href="#FT_CharMapRec">FT_CharMapRec</a></td></tr> -<tr><td> </td><td><a href="#FT_Set_Transform">FT_Set_Transform</a></td><td><a href="#FT_Select_Charmap">FT_Select_Charmap</a></td></tr> -<tr><td><a href="#FT_HAS_HORIZONTAL">FT_HAS_HORIZONTAL</a></td><td><a href="#FT_Load_Glyph">FT_Load_Glyph</a></td><td><a href="#FT_Set_Charmap">FT_Set_Charmap</a></td></tr> -<tr><td><a href="#FT_HAS_VERTICAL">FT_HAS_VERTICAL</a></td><td><a href="#FT_Get_Char_Index">FT_Get_Char_Index</a></td><td><a href="#FT_Get_Charmap_Index">FT_Get_Charmap_Index</a></td></tr> -<tr><td><a href="#FT_HAS_KERNING">FT_HAS_KERNING</a></td><td><a href="#FT_Get_First_Char">FT_Get_First_Char</a></td><td> </td></tr> -<tr><td><a href="#FT_HAS_FIXED_SIZES">FT_HAS_FIXED_SIZES</a></td><td><a href="#FT_Get_Next_Char">FT_Get_Next_Char</a></td><td><a href="#FT_Get_FSType_Flags">FT_Get_FSType_Flags</a></td></tr> -<tr><td><a href="#FT_HAS_GLYPH_NAMES">FT_HAS_GLYPH_NAMES</a></td><td><a href="#FT_Get_Name_Index">FT_Get_Name_Index</a></td><td><a href="#FT_Get_SubGlyph_Info">FT_Get_SubGlyph_Info</a></td></tr> -<tr><td><a href="#FT_HAS_MULTIPLE_MASTERS">FT_HAS_MULTIPLE_MASTERS</a></td><td><a href="#FT_Load_Char">FT_Load_Char</a></td><td> </td></tr> -<tr><td><a href="#FT_HAS_COLOR">FT_HAS_COLOR</a></td><td> </td><td><a href="#FT_Face_Internal">FT_Face_Internal</a></td></tr> -<tr><td> </td><td><a href="#FT_OPEN_MEMORY">FT_OPEN_MEMORY</a></td><td><a href="#FT_Size_Internal">FT_Size_Internal</a></td></tr> -<tr><td><a href="#FT_IS_SFNT">FT_IS_SFNT</a></td><td><a href="#FT_OPEN_STREAM">FT_OPEN_STREAM</a></td><td><a href="#FT_Slot_Internal">FT_Slot_Internal</a></td></tr> -<tr><td><a href="#FT_IS_SCALABLE">FT_IS_SCALABLE</a></td><td><a href="#FT_OPEN_PATHNAME">FT_OPEN_PATHNAME</a></td><td> </td></tr> -<tr><td><a href="#FT_IS_FIXED_WIDTH">FT_IS_FIXED_WIDTH</a></td><td><a href="#FT_OPEN_DRIVER">FT_OPEN_DRIVER</a></td><td><a href="#FT_FACE_FLAG_XXX">FT_FACE_FLAG_XXX</a></td></tr> -<tr><td><a href="#FT_IS_CID_KEYED">FT_IS_CID_KEYED</a></td><td><a href="#FT_OPEN_PARAMS">FT_OPEN_PARAMS</a></td><td><a href="#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_XXX</a></td></tr> -<tr><td><a href="#FT_IS_TRICKY">FT_IS_TRICKY</a></td><td> </td><td><a href="#FT_OPEN_XXX">FT_OPEN_XXX</a></td></tr> -<tr><td> </td><td><a href="#FT_LOAD_DEFAULT">FT_LOAD_DEFAULT</a></td><td><a href="#FT_LOAD_XXX">FT_LOAD_XXX</a></td></tr> -<tr><td><a href="#FT_STYLE_FLAG_BOLD">FT_STYLE_FLAG_BOLD</a></td><td><a href="#FT_LOAD_RENDER">FT_LOAD_RENDER</a></td><td><a href="#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_XXX</a></td></tr> -<tr><td><a href="#FT_STYLE_FLAG_ITALIC">FT_STYLE_FLAG_ITALIC</a></td><td><a href="#FT_LOAD_MONOCHROME">FT_LOAD_MONOCHROME</a></td><td><a href="#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_XXX</a></td></tr> -<tr><td> </td><td><a href="#FT_LOAD_LINEAR_DESIGN">FT_LOAD_LINEAR_DESIGN</a></td><td><a href="#FT_FSTYPE_XXX">FT_FSTYPE_XXX</a></td></tr> -<tr><td><a href="#FT_SizeRec">FT_SizeRec</a></td><td><a href="#FT_LOAD_NO_SCALE">FT_LOAD_NO_SCALE</a></td><td> </td></tr> -<tr><td><a href="#FT_Size_Metrics">FT_Size_Metrics</a></td><td><a href="#FT_LOAD_NO_HINTING">FT_LOAD_NO_HINTING</a></td><td><a href="#FT_HAS_FAST_GLYPHS">FT_HAS_FAST_GLYPHS</a></td></tr> -<tr><td> </td><td><a href="#FT_LOAD_NO_BITMAP">FT_LOAD_NO_BITMAP</a></td><td> </td></tr> -<tr><td><a href="#FT_GlyphSlotRec">FT_GlyphSlotRec</a></td><td><a href="#FT_LOAD_NO_AUTOHINT">FT_LOAD_NO_AUTOHINT</a></td><td><a href="#FT_IS_NAMED_INSTANCE">FT_IS_NAMED_INSTANCE</a></td></tr> -<tr><td><a href="#FT_Glyph_Metrics">FT_Glyph_Metrics</a></td><td><a href="#FT_LOAD_COLOR">FT_LOAD_COLOR</a></td><td></td></tr> +<tr><td><a href="#FT_FACE_FLAG_SCALABLE">FT_FACE_FLAG_SCALABLE</a></td><td><a href="#FT_Done_Face">FT_Done_Face</a></td><td><a href="#FT_LOAD_TARGET_LIGHT">FT_LOAD_TARGET_LIGHT</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_FIXED_SIZES">FT_FACE_FLAG_FIXED_SIZES</a></td><td><a href="#FT_Reference_Face">FT_Reference_Face</a></td><td><a href="#FT_LOAD_TARGET_MONO">FT_LOAD_TARGET_MONO</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_FIXED_WIDTH">FT_FACE_FLAG_FIXED_WIDTH</a></td><td><a href="#FT_New_Memory_Face">FT_New_Memory_Face</a></td><td><a href="#FT_LOAD_TARGET_LCD">FT_LOAD_TARGET_LCD</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_HORIZONTAL">FT_FACE_FLAG_HORIZONTAL</a></td><td><a href="#FT_Face_Properties">FT_Face_Properties</a></td><td><a href="#FT_LOAD_TARGET_LCD_V">FT_LOAD_TARGET_LCD_V</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_VERTICAL">FT_FACE_FLAG_VERTICAL</a></td><td><a href="#FT_Open_Face">FT_Open_Face</a></td><td> </td></tr> +<tr><td><a href="#FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</a></td><td><a href="#FT_Open_Args">FT_Open_Args</a></td><td><a href="#FT_LOAD_TARGET_MODE">FT_LOAD_TARGET_MODE</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_SFNT">FT_FACE_FLAG_SFNT</a></td><td><a href="#FT_Parameter">FT_Parameter</a></td><td> </td></tr> +<tr><td><a href="#FT_FACE_FLAG_CID_KEYED">FT_FACE_FLAG_CID_KEYED</a></td><td><a href="#FT_Attach_File">FT_Attach_File</a></td><td><a href="#FT_Render_Glyph">FT_Render_Glyph</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_TRICKY">FT_FACE_FLAG_TRICKY</a></td><td><a href="#FT_Attach_Stream">FT_Attach_Stream</a></td><td><a href="#FT_Render_Mode">FT_Render_Mode</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_KERNING">FT_FACE_FLAG_KERNING</a></td><td> </td><td><a href="#FT_Get_Kerning">FT_Get_Kerning</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_MULTIPLE_MASTERS">FT_FACE_FLAG_MULTIPLE_MASTERS</a></td><td><a href="#FT_Set_Char_Size">FT_Set_Char_Size</a></td><td><a href="#FT_Kerning_Mode">FT_Kerning_Mode</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_VARIATION">FT_FACE_FLAG_VARIATION</a></td><td><a href="#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a></td><td><a href="#FT_Get_Track_Kerning">FT_Get_Track_Kerning</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_GLYPH_NAMES">FT_FACE_FLAG_GLYPH_NAMES</a></td><td><a href="#FT_Request_Size">FT_Request_Size</a></td><td><a href="#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_EXTERNAL_STREAM">FT_FACE_FLAG_EXTERNAL_STREAM</a></td><td><a href="#FT_Select_Size">FT_Select_Size</a></td><td><a href="#FT_Get_Postscript_Name">FT_Get_Postscript_Name</a></td></tr> +<tr><td><a href="#FT_FACE_FLAG_HINTER">FT_FACE_FLAG_HINTER</a></td><td><a href="#FT_Size_Request_Type">FT_Size_Request_Type</a></td><td> </td></tr> +<tr><td> </td><td><a href="#FT_Size_RequestRec">FT_Size_RequestRec</a></td><td><a href="#FT_CharMapRec">FT_CharMapRec</a></td></tr> +<tr><td><a href="#FT_HAS_HORIZONTAL">FT_HAS_HORIZONTAL</a></td><td><a href="#FT_Size_Request">FT_Size_Request</a></td><td><a href="#FT_Select_Charmap">FT_Select_Charmap</a></td></tr> +<tr><td><a href="#FT_HAS_VERTICAL">FT_HAS_VERTICAL</a></td><td><a href="#FT_Set_Transform">FT_Set_Transform</a></td><td><a href="#FT_Set_Charmap">FT_Set_Charmap</a></td></tr> +<tr><td><a href="#FT_HAS_KERNING">FT_HAS_KERNING</a></td><td><a href="#FT_Load_Glyph">FT_Load_Glyph</a></td><td><a href="#FT_Get_Charmap_Index">FT_Get_Charmap_Index</a></td></tr> +<tr><td><a href="#FT_HAS_FIXED_SIZES">FT_HAS_FIXED_SIZES</a></td><td><a href="#FT_Get_Char_Index">FT_Get_Char_Index</a></td><td> </td></tr> +<tr><td><a href="#FT_HAS_GLYPH_NAMES">FT_HAS_GLYPH_NAMES</a></td><td><a href="#FT_Get_First_Char">FT_Get_First_Char</a></td><td><a href="#FT_Get_FSType_Flags">FT_Get_FSType_Flags</a></td></tr> +<tr><td><a href="#FT_HAS_COLOR">FT_HAS_COLOR</a></td><td><a href="#FT_Get_Next_Char">FT_Get_Next_Char</a></td><td><a href="#FT_Get_SubGlyph_Info">FT_Get_SubGlyph_Info</a></td></tr> +<tr><td><a href="#FT_HAS_MULTIPLE_MASTERS">FT_HAS_MULTIPLE_MASTERS</a></td><td><a href="#FT_Get_Name_Index">FT_Get_Name_Index</a></td><td> </td></tr> +<tr><td> </td><td><a href="#FT_Load_Char">FT_Load_Char</a></td><td><a href="#FT_Face_Internal">FT_Face_Internal</a></td></tr> +<tr><td><a href="#FT_IS_SFNT">FT_IS_SFNT</a></td><td> </td><td><a href="#FT_Size_Internal">FT_Size_Internal</a></td></tr> +<tr><td><a href="#FT_IS_SCALABLE">FT_IS_SCALABLE</a></td><td><a href="#FT_OPEN_MEMORY">FT_OPEN_MEMORY</a></td><td><a href="#FT_Slot_Internal">FT_Slot_Internal</a></td></tr> +<tr><td><a href="#FT_IS_FIXED_WIDTH">FT_IS_FIXED_WIDTH</a></td><td><a href="#FT_OPEN_STREAM">FT_OPEN_STREAM</a></td><td> </td></tr> +<tr><td><a href="#FT_IS_CID_KEYED">FT_IS_CID_KEYED</a></td><td><a href="#FT_OPEN_PATHNAME">FT_OPEN_PATHNAME</a></td><td><a href="#FT_FACE_FLAG_XXX">FT_FACE_FLAG_XXX</a></td></tr> +<tr><td><a href="#FT_IS_TRICKY">FT_IS_TRICKY</a></td><td><a href="#FT_OPEN_DRIVER">FT_OPEN_DRIVER</a></td><td><a href="#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_XXX</a></td></tr> +<tr><td><a href="#FT_IS_NAMED_INSTANCE">FT_IS_NAMED_INSTANCE</a></td><td><a href="#FT_OPEN_PARAMS">FT_OPEN_PARAMS</a></td><td><a href="#FT_OPEN_XXX">FT_OPEN_XXX</a></td></tr> +<tr><td><a href="#FT_IS_VARIATION">FT_IS_VARIATION</a></td><td> </td><td><a href="#FT_LOAD_XXX">FT_LOAD_XXX</a></td></tr> +<tr><td> </td><td><a href="#FT_LOAD_DEFAULT">FT_LOAD_DEFAULT</a></td><td><a href="#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_XXX</a></td></tr> +<tr><td><a href="#FT_STYLE_FLAG_BOLD">FT_STYLE_FLAG_BOLD</a></td><td><a href="#FT_LOAD_RENDER">FT_LOAD_RENDER</a></td><td><a href="#FT_SUBGLYPH_FLAG_XXX">FT_SUBGLYPH_FLAG_XXX</a></td></tr> +<tr><td><a href="#FT_STYLE_FLAG_ITALIC">FT_STYLE_FLAG_ITALIC</a></td><td><a href="#FT_LOAD_MONOCHROME">FT_LOAD_MONOCHROME</a></td><td><a href="#FT_FSTYPE_XXX">FT_FSTYPE_XXX</a></td></tr> +<tr><td> </td><td><a href="#FT_LOAD_LINEAR_DESIGN">FT_LOAD_LINEAR_DESIGN</a></td><td> </td></tr> +<tr><td><a href="#FT_SizeRec">FT_SizeRec</a></td><td><a href="#FT_LOAD_NO_SCALE">FT_LOAD_NO_SCALE</a></td><td><a href="#FT_HAS_FAST_GLYPHS">FT_HAS_FAST_GLYPHS</a></td></tr> +<tr><td><a href="#FT_Size_Metrics">FT_Size_Metrics</a></td><td><a href="#FT_LOAD_NO_HINTING">FT_LOAD_NO_HINTING</a></td><td></td></tr> +<tr><td> </td><td><a href="#FT_LOAD_NO_BITMAP">FT_LOAD_NO_BITMAP</a></td><td></td></tr> </table> @@ -181,11 +182,11 @@ <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_FaceRec_* <b>FT_Face</b>; </pre> -<p>A handle to a given typographic face object. A face object models a given typeface, in a given style.</p> +<p>A handle to a typographic face object. A face object models a given typeface, in a given style.</p> <h4>note</h4> -<p>Each face object also owns a single <a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a> object, as well as one or more <a href="ft2-base_interface.html#FT_Size">FT_Size</a> objects.</p> -<p>Use <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> to create a new face object from a given filepathname or a custom input stream.</p> +<p>A face object also owns a single <a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a> object, as well as one or more <a href="ft2-base_interface.html#FT_Size">FT_Size</a> objects.</p> +<p>Use <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> to create a new face object from a given filepath or a custom input stream.</p> <p>Use <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a> to destroy it (along with its slot and sizes).</p> <p>An ‘FT_Face’ object can only be safely used from one thread at a time. Similarly, creation and destruction of ‘FT_Face’ with the same <a href="ft2-base_interface.html#FT_Library">FT_Library</a> object can only be done from one thread at a time. On the other hand, functions like <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> and its siblings are thread-safe and do not need the lock to be held as long as the same ‘FT_Face’ object is not used from multiple threads at the same time.</p> @@ -202,10 +203,10 @@ <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_SizeRec_* <b>FT_Size</b>; </pre> -<p>A handle to an object used to model a face scaled to a given character size.</p> +<p>A handle to an object that models a face scaled to a given character size.</p> <h4>note</h4> -<p>Each <a href="ft2-base_interface.html#FT_Face">FT_Face</a> has an <i>active</i> <a href="ft2-base_interface.html#FT_Size">FT_Size</a> object that is used by functions like <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> to determine the scaling transformation that in turn is used to load and hint glyphs and metrics.</p> +<p>An <a href="ft2-base_interface.html#FT_Face">FT_Face</a> has one <i>active</i> <a href="ft2-base_interface.html#FT_Size">FT_Size</a> object that is used by functions like <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> to determine the scaling transformation that in turn is used to load and hint glyphs and metrics.</p> <p>You can use <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>, <a href="ft2-base_interface.html#FT_Set_Pixel_Sizes">FT_Set_Pixel_Sizes</a>, <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> or even <a href="ft2-base_interface.html#FT_Select_Size">FT_Select_Size</a> to change the content (i.e., the scaling values) of the active <a href="ft2-base_interface.html#FT_Size">FT_Size</a>.</p> <p>You can use <a href="ft2-sizes_management.html#FT_New_Size">FT_New_Size</a> to create additional size objects for a given <a href="ft2-base_interface.html#FT_Face">FT_Face</a>, but they won't be used by other functions until you activate it through <a href="ft2-sizes_management.html#FT_Activate_Size">FT_Activate_Size</a>. Only one size can be activated at any given time per face.</p> @@ -222,7 +223,7 @@ <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_GlyphSlotRec_* <b>FT_GlyphSlot</b>; </pre> -<p>A handle to a given ‘glyph slot’. A slot is a container where it is possible to load any of the glyphs contained in its parent face.</p> +<p>A handle to a given ‘glyph slot’. A slot is a container that can hold any of the glyphs contained in its parent face.</p> <p>In other words, each time you call <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>, the slot's content is erased by the new glyph data, i.e., the glyph's metrics, its image (bitmap or outline), and other control information.</p> <h4>also</h4> @@ -238,13 +239,13 @@ <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_CharMapRec_* <b>FT_CharMap</b>; </pre> -<p>A handle to a given character map. A charmap is used to translate character codes in a given encoding into glyph indexes for its parent's face. Some font formats may provide several charmaps per font.</p> -<p>Each face object owns zero or more charmaps, but only one of them can be ‘active’ and used by <a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>.</p> +<p>A handle to a character map (usually abbreviated to ‘charmap’). A charmap is used to translate character codes in a given encoding into glyph indexes for its parent's face. Some font formats may provide several charmaps per font.</p> +<p>Each face object owns zero or more charmaps, but only one of them can be ‘active’, providing the data used by <a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a> or <a href="ft2-base_interface.html#FT_Load_Char">FT_Load_Char</a>.</p> <p>The list of available charmaps in a face is available through the ‘face->num_charmaps’ and ‘face->charmaps’ fields of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> <p>The currently active charmap is available as ‘face->charmap’. You should call <a href="ft2-base_interface.html#FT_Set_Charmap">FT_Set_Charmap</a> to change it.</p> <h4>note</h4> -<p>When a new face is created (either through <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>), the library looks for a Unicode charmap within the list and automatically activates it.</p> +<p>When a new face is created (either through <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>), the library looks for a Unicode charmap within the list and automatically activates it. If there is no Unicode charmap, FreeType doesn't set an ‘active’ charmap.</p> <h4>also</h4> <p>See <a href="ft2-base_interface.html#FT_CharMapRec">FT_CharMapRec</a> for the publicly accessible fields of a given character map.</p> @@ -264,14 +265,15 @@ <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_UNICODE">FT_ENCODING_UNICODE</a>, 'u', 'n', 'i', 'c' ), <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_SJIS">FT_ENCODING_SJIS</a>, 's', 'j', 'i', 's' ), - <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_GB2312">FT_ENCODING_GB2312</a>, 'g', 'b', ' ', ' ' ), + <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_PRC">FT_ENCODING_PRC</a>, 'g', 'b', ' ', ' ' ), <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_BIG5">FT_ENCODING_BIG5</a>, 'b', 'i', 'g', '5' ), <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_WANSUNG">FT_ENCODING_WANSUNG</a>, 'w', 'a', 'n', 's' ), <a href="ft2-base_interface.html#FT_ENC_TAG">FT_ENC_TAG</a>( <a href="ft2-base_interface.html#FT_ENCODING_JOHAB">FT_ENCODING_JOHAB</a>, 'j', 'o', 'h', 'a' ), - /* for backwards compatibility */ + /* for backward compatibility */ + FT_ENCODING_GB2312 = <a href="ft2-base_interface.html#FT_ENCODING_PRC">FT_ENCODING_PRC</a>, <a href="ft2-base_interface.html#FT_ENCODING_MS_SJIS">FT_ENCODING_MS_SJIS</a> = <a href="ft2-base_interface.html#FT_ENCODING_SJIS">FT_ENCODING_SJIS</a>, - <a href="ft2-base_interface.html#FT_ENCODING_MS_GB2312">FT_ENCODING_MS_GB2312</a> = <a href="ft2-base_interface.html#FT_ENCODING_GB2312">FT_ENCODING_GB2312</a>, + <a href="ft2-base_interface.html#FT_ENCODING_MS_GB2312">FT_ENCODING_MS_GB2312</a> = <a href="ft2-base_interface.html#FT_ENCODING_PRC">FT_ENCODING_PRC</a>, <a href="ft2-base_interface.html#FT_ENCODING_MS_BIG5">FT_ENCODING_MS_BIG5</a> = <a href="ft2-base_interface.html#FT_ENCODING_BIG5">FT_ENCODING_BIG5</a>, <a href="ft2-base_interface.html#FT_ENCODING_MS_WANSUNG">FT_ENCODING_MS_WANSUNG</a> = <a href="ft2-base_interface.html#FT_ENCODING_WANSUNG">FT_ENCODING_WANSUNG</a>, <a href="ft2-base_interface.html#FT_ENCODING_MS_JOHAB">FT_ENCODING_MS_JOHAB</a> = <a href="ft2-base_interface.html#FT_ENCODING_JOHAB">FT_ENCODING_JOHAB</a>, @@ -296,7 +298,7 @@ #define ft_encoding_latin_1 <a href="ft2-base_interface.html#FT_ENCODING_ADOBE_LATIN_1">FT_ENCODING_ADOBE_LATIN_1</a> #define ft_encoding_latin_2 <a href="ft2-base_interface.html#FT_ENCODING_OLD_LATIN_2">FT_ENCODING_OLD_LATIN_2</a> #define ft_encoding_sjis <a href="ft2-base_interface.html#FT_ENCODING_SJIS">FT_ENCODING_SJIS</a> -#define ft_encoding_gb2312 <a href="ft2-base_interface.html#FT_ENCODING_GB2312">FT_ENCODING_GB2312</a> +#define ft_encoding_gb2312 <a href="ft2-base_interface.html#FT_ENCODING_PRC">FT_ENCODING_PRC</a> #define ft_encoding_big5 <a href="ft2-base_interface.html#FT_ENCODING_BIG5">FT_ENCODING_BIG5</a> #define ft_encoding_wansung <a href="ft2-base_interface.html#FT_ENCODING_WANSUNG">FT_ENCODING_WANSUNG</a> #define ft_encoding_johab <a href="ft2-base_interface.html#FT_ENCODING_JOHAB">FT_ENCODING_JOHAB</a> @@ -307,7 +309,7 @@ #define ft_encoding_apple_roman <a href="ft2-base_interface.html#FT_ENCODING_APPLE_ROMAN">FT_ENCODING_APPLE_ROMAN</a> </pre> -<p>An enumeration used to specify character sets supported by charmaps. Used in the <a href="ft2-base_interface.html#FT_Select_Charmap">FT_Select_Charmap</a> API function.</p> +<p>An enumeration to specify character sets supported by charmaps. Used in the <a href="ft2-base_interface.html#FT_Select_Charmap">FT_Select_Charmap</a> API function.</p> <h4>note</h4> <p>Despite the name, this enumeration lists specific character repertories (i.e., charsets), and not text encoding methods (e.g., UTF-8, UTF-16, etc.).</p> @@ -319,51 +321,51 @@ <p>The encoding value 0 is reserved.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_UNICODE">FT_ENCODING_UNICODE</td><td class="desc"> -<p>Corresponds to the Unicode character set. This value covers all versions of the Unicode repertoire, including ASCII and Latin-1. Most fonts include a Unicode charmap, but not all of them.</p> +<p>The Unicode character set. This value covers all versions of the Unicode repertoire, including ASCII and Latin-1. Most fonts include a Unicode charmap, but not all of them.</p> <p>For example, if you want to access Unicode value U+1F028 (and the font contains it), use value 0x1F028 as the input value for <a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a>.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_MS_SYMBOL">FT_ENCODING_MS_SYMBOL</td><td class="desc"> -<p>Corresponds to the Microsoft Symbol encoding, used to encode mathematical symbols and wingdings. For more information, see ‘<a href="http://www.microsoft.com/typography/otspec/recom.htm">http://www.microsoft.com/typography/otspec/recom.htm</a>’, ‘<a href="http://www.kostis.net/charsets/symbol.htm">http://www.kostis.net/charsets/symbol.htm</a>’, and ‘<a href="http://www.kostis.net/charsets/wingding.htm">http://www.kostis.net/charsets/wingding.htm</a>’.</p> +<p>Microsoft Symbol encoding, used to encode mathematical symbols and wingdings. For more information, see ‘<a href="https://www.microsoft.com/typography/otspec/recom.htm">https://www.microsoft.com/typography/otspec/recom.htm</a>’, ‘<a href="http://www.kostis.net/charsets/symbol.htm">http://www.kostis.net/charsets/symbol.htm</a>’, and ‘<a href="http://www.kostis.net/charsets/wingding.htm">http://www.kostis.net/charsets/wingding.htm</a>’.</p> <p>This encoding uses character codes from the PUA (Private Unicode Area) in the range U+F020-U+F0FF.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_SJIS">FT_ENCODING_SJIS</td><td class="desc"> -<p>Corresponds to Japanese SJIS encoding. More info at ‘<a href="http://en.wikipedia.org/wiki/Shift_JIS">http://en.wikipedia.org/wiki/Shift_JIS</a>’. See note on multi-byte encodings below.</p> +<p>Shift JIS encoding for Japanese. More info at ‘<a href="https://en.wikipedia.org/wiki/Shift_JIS">https://en.wikipedia.org/wiki/Shift_JIS</a>’. See note on multi-byte encodings below.</p> </td></tr> -<tr><td class="val" id="FT_ENCODING_GB2312">FT_ENCODING_GB2312</td><td class="desc"> -<p>Corresponds to an encoding system for Simplified Chinese as used in mainland China.</p> +<tr><td class="val" id="FT_ENCODING_PRC">FT_ENCODING_PRC</td><td class="desc"> +<p>Corresponds to encoding systems mainly for Simplified Chinese as used in People's Republic of China (PRC). The encoding layout is based on GB 2312 and its supersets GBK and GB 18030.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_BIG5">FT_ENCODING_BIG5</td><td class="desc"> <p>Corresponds to an encoding system for Traditional Chinese as used in Taiwan and Hong Kong.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_WANSUNG">FT_ENCODING_WANSUNG</td><td class="desc"> -<p>Corresponds to the Korean encoding system known as Wansung. For more information see ‘<a href="https://msdn.microsoft.com/en-US/goglobal/cc305154">https://msdn.microsoft.com/en-US/goglobal/cc305154</a>’.</p> +<p>Corresponds to the Korean encoding system known as Extended Wansung (MS Windows code page 949). For more information see ‘<a href="https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit949.txt">https://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WindowsBestFit/bestfit949.txt</a>’.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_JOHAB">FT_ENCODING_JOHAB</td><td class="desc"> -<p>The Korean standard character set (KS C 5601-1992), which corresponds to MS Windows code page 1361. This character set includes all possible Hangeul character combinations.</p> +<p>The Korean standard character set (KS C 5601-1992), which corresponds to MS Windows code page 1361. This character set includes all possible Hangul character combinations.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_ADOBE_LATIN_1">FT_ENCODING_ADOBE_LATIN_1</td><td class="desc"> <p>Corresponds to a Latin-1 encoding as defined in a Type 1 PostScript font. It is limited to 256 character codes.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_ADOBE_STANDARD">FT_ENCODING_ADOBE_STANDARD</td><td class="desc"> -<p>Corresponds to the Adobe Standard encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.</p> +<p>Adobe Standard encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_ADOBE_EXPERT">FT_ENCODING_ADOBE_EXPERT</td><td class="desc"> -<p>Corresponds to the Adobe Expert encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.</p> +<p>Adobe Expert encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_ADOBE_CUSTOM">FT_ENCODING_ADOBE_CUSTOM</td><td class="desc"> <p>Corresponds to a custom encoding, as found in Type 1, CFF, and OpenType/CFF fonts. It is limited to 256 character codes.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_APPLE_ROMAN">FT_ENCODING_APPLE_ROMAN</td><td class="desc"> -<p>Corresponds to the 8-bit Apple roman encoding. Many TrueType and OpenType fonts contain a charmap for this encoding, since older versions of Mac OS are able to use it.</p> +<p>Apple roman encoding. Many TrueType and OpenType fonts contain a charmap for this 8-bit encoding, since older versions of Mac OS are able to use it.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_OLD_LATIN_2">FT_ENCODING_OLD_LATIN_2</td><td class="desc"> -<p>This value is deprecated and was never used nor reported by FreeType. Don't use or test for it.</p> +<p>This value is deprecated and was neither used nor reported by FreeType. Don't use or test for it.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_MS_SJIS">FT_ENCODING_MS_SJIS</td><td class="desc"> <p>Same as FT_ENCODING_SJIS. Deprecated.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_MS_GB2312">FT_ENCODING_MS_GB2312</td><td class="desc"> -<p>Same as FT_ENCODING_GB2312. Deprecated.</p> +<p>Same as FT_ENCODING_PRC. Deprecated.</p> </td></tr> <tr><td class="val" id="FT_ENCODING_MS_BIG5">FT_ENCODING_MS_BIG5</td><td class="desc"> <p>Same as FT_ENCODING_BIG5. Deprecated.</p> @@ -377,13 +379,13 @@ </table> <h4>note</h4> -<p>By default, FreeType automatically synthesizes a Unicode charmap for PostScript fonts, using their glyph names dictionaries. However, it also reports the encodings defined explicitly in the font file, for the cases when they are needed, with the Adobe values as well.</p> +<p>By default, FreeType enables a Unicode charmap and tags it with FT_ENCODING_UNICODE when it is either provided or can be generated from PostScript glyph name dictionaries in the font file. All other encodings are considered legacy and tagged only if explicitly defined in the font file. Otherwise, FT_ENCODING_NONE is used.</p> <p>FT_ENCODING_NONE is set by the BDF and PCF drivers if the charmap is neither Unicode nor ISO-8859-1 (otherwise it is set to FT_ENCODING_UNICODE). Use <a href="ft2-bdf_fonts.html#FT_Get_BDF_Charset_ID">FT_Get_BDF_Charset_ID</a> to find out which encoding is really present. If, for example, the ‘cs_registry’ field is ‘KOI8’ and the ‘cs_encoding’ field is ‘R’, the font is encoded in KOI8-R.</p> <p>FT_ENCODING_NONE is always set (with a single exception) by the winfonts driver. Use <a href="ft2-winfnt_fonts.html#FT_Get_WinFNT_Header">FT_Get_WinFNT_Header</a> and examine the ‘charset’ field of the <a href="ft2-winfnt_fonts.html#FT_WinFNT_HeaderRec">FT_WinFNT_HeaderRec</a> structure to find out which encoding is really present. For example, <a href="ft2-winfnt_fonts.html#FT_WinFNT_ID_XXX">FT_WinFNT_ID_CP1251</a> (204) means Windows code page 1251 (for Russian).</p> -<p>FT_ENCODING_NONE is set if ‘platform_id’ is <a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_MACINTOSH</a> and ‘encoding_id’ is not <a href="ft2-truetype_tables.html#TT_MAC_ID_XXX">TT_MAC_ID_ROMAN</a> (otherwise it is set to FT_ENCODING_APPLE_ROMAN).</p> +<p>FT_ENCODING_NONE is set if ‘platform_id’ is <a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_MACINTOSH</a> and ‘encoding_id’ is not ‘TT_MAC_ID_ROMAN’ (otherwise it is set to FT_ENCODING_APPLE_ROMAN).</p> <p>If ‘platform_id’ is <a href="ft2-truetype_tables.html#TT_PLATFORM_XXX">TT_PLATFORM_MACINTOSH</a>, use the function <a href="ft2-truetype_tables.html#FT_Get_CMap_Language_ID">FT_Get_CMap_Language_ID</a> to query the Mac language ID that may be needed to be able to distinguish Apple encoding variants. See</p> -<p><a href="http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt">http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt</a></p> -<p>to get an idea how to do that. Basically, if the language ID is 0, don't use it, otherwise subtract 1 from the language ID. Then examine ‘encoding_id’. If, for example, ‘encoding_id’ is <a href="ft2-truetype_tables.html#TT_MAC_ID_XXX">TT_MAC_ID_ROMAN</a> and the language ID (minus 1) is ‘TT_MAC_LANGID_GREEK’, it is the Greek encoding, not Roman. <a href="ft2-truetype_tables.html#TT_MAC_ID_XXX">TT_MAC_ID_ARABIC</a> with ‘TT_MAC_LANGID_FARSI’ means the Farsi variant the Arabic encoding.</p> +<p><a href="https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt">https://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt</a></p> +<p>to get an idea how to do that. Basically, if the language ID is 0, don't use it, otherwise subtract 1 from the language ID. Then examine ‘encoding_id’. If, for example, ‘encoding_id’ is ‘TT_MAC_ID_ROMAN’ and the language ID (minus 1) is ‘TT_MAC_LANGID_GREEK’, it is the Greek encoding, not Roman. ‘TT_MAC_ID_ARABIC’ with ‘TT_MAC_LANGID_FARSI’ means the Farsi variant the Arabic encoding.</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> @@ -482,22 +484,24 @@ <h4>fields</h4> <table class="fields"> <tr><td class="val" id="num_faces">num_faces</td><td class="desc"> -<p>The number of faces in the font file. Some font formats can have multiple faces in a font file.</p> +<p>The number of faces in the font file. Some font formats can have multiple faces in a single font file.</p> </td></tr> <tr><td class="val" id="face_index">face_index</td><td class="desc"> <p>This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). They are set to 0 if there is only one face in the font file.</p> -<p>Bits 16-30 are relevant to GX variation fonts only, holding the named instance index for the current face index (starting with value 1; value 0 indicates font access without GX variation data). For non-GX fonts, bits 16-30 are ignored. If we have the third named instance of face 4, say, ‘face_index’ is set to 0x00030004.</p> +<p>[Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, holding the named instance index for the current face index (starting with value 1; value 0 indicates font access without a named instance). For non-variation fonts, bits 16-30 are ignored. If we have the third named instance of face 4, say, ‘face_index’ is set to 0x00030004.</p> <p>Bit 31 is always zero (this is, ‘face_index’ is always a positive value).</p> +<p>[Since 2.9] Changing the design coordinates with <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a> or <a href="ft2-multiple_masters.html#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a> does not influence the named instance index value (only <a href="ft2-multiple_masters.html#FT_Set_Named_Instance">FT_Set_Named_Instance</a> does that).</p> </td></tr> <tr><td class="val" id="face_flags">face_flags</td><td class="desc"> <p>A set of bit flags that give important information about the face; see <a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_XXX</a> for the details.</p> </td></tr> <tr><td class="val" id="style_flags">style_flags</td><td class="desc"> -<p>The lower 16 bits contain a set of bit flags indicating the style of the face; see <a href="ft2-base_interface.html#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_XXX</a> for the details. Bits 16-30 hold the number of named instances available for the current face if we have a GX variation (sub)font. Bit 31 is always zero (this is, ‘style_flags’ is always a positive value).</p> +<p>The lower 16 bits contain a set of bit flags indicating the style of the face; see <a href="ft2-base_interface.html#FT_STYLE_FLAG_XXX">FT_STYLE_FLAG_XXX</a> for the details.</p> +<p>[Since 2.6.1] Bits 16-30 hold the number of named instances available for the current face if we have a GX or OpenType variation (sub)font. Bit 31 is always zero (this is, ‘style_flags’ is always a positive value). Note that a variation font has always at least one named instance, namely the default instance.</p> </td></tr> <tr><td class="val" id="num_glyphs">num_glyphs</td><td class="desc"> <p>The number of glyphs in the face. If the face is scalable and has sbits (see ‘num_fixed_sizes’), it is set to the number of outline glyphs.</p> -<p>For CID-keyed fonts, this value gives the highest CID used in the font.</p> +<p>For CID-keyed fonts (not in an SFNT wrapper) this value gives the highest CID used in the font.</p> </td></tr> <tr><td class="val" id="family_name">family_name</td><td class="desc"> <p>The face's family name. This is an ASCII string, usually in English, that describes the typeface's family (like ‘Times New Roman’, ‘Bodoni’, ‘Garamond’, etc). This is a least common denominator used to list fonts. Some formats (TrueType & OpenType) provide localized and Unicode versions of this string. Applications should use the format specific interface to access them. Can be NULL (e.g., in fonts embedded in a PDF file).</p> @@ -533,7 +537,7 @@ <p>The typographic ascender of the face, expressed in font units. For font formats not having this information, it is set to ‘bbox.yMax’. Only relevant for scalable formats.</p> </td></tr> <tr><td class="val" id="descender">descender</td><td class="desc"> -<p>The typographic descender of the face, expressed in font units. For font formats not having this information, it is set to ‘bbox.yMin’. Note that this field is usually negative. Only relevant for scalable formats.</p> +<p>The typographic descender of the face, expressed in font units. For font formats not having this information, it is set to ‘bbox.yMin’. Note that this field is negative for values below the baseline. Only relevant for scalable formats.</p> </td></tr> <tr><td class="val" id="height">height</td><td class="desc"> <p>This value is the vertical distance between two consecutive baselines, expressed in font units. It is always positive. Only relevant for scalable formats.</p> @@ -564,6 +568,8 @@ <h4>note</h4> <p>Fields may be changed after a call to <a href="ft2-base_interface.html#FT_Attach_File">FT_Attach_File</a> or <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a>.</p> +<p>For an OpenType variation font, the values of the following fields can change after a call to <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a> (and friends) if the font contains an ‘MVAR’ table: ‘ascender’, ‘descender’, ‘height’, ‘underline_position’, and ‘underline_thickness’.</p> +<p>Especially for TrueType fonts see also the documentation for <a href="ft2-base_interface.html#FT_Size_Metrics">FT_Size_Metrics</a>.</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> @@ -637,27 +643,30 @@ <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="FT_HAS_MULTIPLE_MASTERS">FT_HAS_MULTIPLE_MASTERS</h3> +<h3 id="FT_HAS_COLOR">FT_HAS_COLOR</h3> <p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> <pre> -#define <b>FT_HAS_MULTIPLE_MASTERS</b>( face ) \ - ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_MULTIPLE_MASTERS">FT_FACE_FLAG_MULTIPLE_MASTERS</a> ) +#define <b>FT_HAS_COLOR</b>( face ) \ + ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</a> ) </pre> -<p>A macro that returns true whenever a face object contains some multiple masters. The functions provided by <a href="ft2-header_file_macros.html#FT_MULTIPLE_MASTERS_H">FT_MULTIPLE_MASTERS_H</a> are then available to choose the exact design you want.</p> +<p>A macro that returns true whenever a face object contains tables for color glyphs.</p> + +<h4>since</h4> +<p>2.5.1</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> <div class="section"> -<h3 id="FT_HAS_COLOR">FT_HAS_COLOR</h3> +<h3 id="FT_HAS_MULTIPLE_MASTERS">FT_HAS_MULTIPLE_MASTERS</h3> <p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> <pre> -#define <b>FT_HAS_COLOR</b>( face ) \ - ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</a> ) +#define <b>FT_HAS_MULTIPLE_MASTERS</b>( face ) \ + ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_MULTIPLE_MASTERS">FT_FACE_FLAG_MULTIPLE_MASTERS</a> ) </pre> -<p>A macro that returns true whenever a face object contains tables for color glyphs.</p> +<p>A macro that returns true whenever a face object contains some multiple masters. The functions provided by <a href="ft2-header_file_macros.html#FT_MULTIPLE_MASTERS_H">FT_MULTIPLE_MASTERS_H</a> are then available to choose the exact design you want.</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> @@ -684,7 +693,7 @@ ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_SCALABLE">FT_FACE_FLAG_SCALABLE</a> ) </pre> -<p>A macro that returns true whenever a face object contains a scalable font face (true for TrueType, Type 1, Type 42, CID, OpenType/CFF, and PFR font formats.</p> +<p>A macro that returns true whenever a face object contains a scalable font face (true for TrueType, Type 1, Type 42, CID, OpenType/CFF, and PFR font formats).</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> @@ -730,6 +739,39 @@ <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="FT_IS_NAMED_INSTANCE">FT_IS_NAMED_INSTANCE</h3> +<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> +<pre> +#define <b>FT_IS_NAMED_INSTANCE</b>( face ) \ + ( (face)->face_index & 0x7FFF0000L ) +</pre> + +<p>A macro that returns true whenever a face object is a named instance of a GX or OpenType variation font.</p> +<p>[Since 2.9] Changing the design coordinates with <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a> or <a href="ft2-multiple_masters.html#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a> does not influence the return value of this macro (only <a href="ft2-multiple_masters.html#FT_Set_Named_Instance">FT_Set_Named_Instance</a> does that).</p> + +<h4>since</h4> +<p>2.7</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> + +<div class="section"> +<h3 id="FT_IS_VARIATION">FT_IS_VARIATION</h3> +<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> +<pre> +#define <b>FT_IS_VARIATION</b>( face ) \ + ( (face)->face_flags & <a href="ft2-base_interface.html#FT_FACE_FLAG_VARIATION">FT_FACE_FLAG_VARIATION</a> ) +</pre> + +<p>A macro that returns true whenever a face object has been altered by <a href="ft2-multiple_masters.html#FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a>, <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a>, or <a href="ft2-multiple_masters.html#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a>.</p> + +<h4>since</h4> +<p>2.9</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> + +<div class="section"> <h3 id="FT_SizeRec">FT_SizeRec</h3> <p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> <pre> @@ -792,30 +834,58 @@ <p>The height of the scaled EM square in pixels, hence the term ‘ppem’ (pixels per EM). It is also referred to as ‘nominal height’.</p> </td></tr> <tr><td class="val" id="x_scale">x_scale</td><td class="desc"> -<p>A 16.16 fractional scaling value used to convert horizontal metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.</p> +<p>A 16.16 fractional scaling value to convert horizontal metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.</p> </td></tr> <tr><td class="val" id="y_scale">y_scale</td><td class="desc"> -<p>A 16.16 fractional scaling value used to convert vertical metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.</p> +<p>A 16.16 fractional scaling value to convert vertical metrics from font units to 26.6 fractional pixels. Only relevant for scalable font formats.</p> </td></tr> <tr><td class="val" id="ascender">ascender</td><td class="desc"> -<p>The ascender in 26.6 fractional pixels. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> +<p>The ascender in 26.6 fractional pixels, rounded up to an integer value. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> </td></tr> <tr><td class="val" id="descender">descender</td><td class="desc"> -<p>The descender in 26.6 fractional pixels. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> +<p>The descender in 26.6 fractional pixels, rounded down to an integer value. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> </td></tr> <tr><td class="val" id="height">height</td><td class="desc"> -<p>The height in 26.6 fractional pixels. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> +<p>The height in 26.6 fractional pixels, rounded to an integer value. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> </td></tr> <tr><td class="val" id="max_advance">max_advance</td><td class="desc"> -<p>The maximum advance width in 26.6 fractional pixels. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> +<p>The maximum advance width in 26.6 fractional pixels, rounded to an integer value. See <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> for the details.</p> </td></tr> </table> <h4>note</h4> -<p>The scaling values, if relevant, are determined first during a size changing operation. The remaining fields are then set by the driver. For scalable formats, they are usually set to scaled values of the corresponding fields in <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> -<p>Note that due to glyph hinting, these values might not be exact for certain fonts. Thus they must be treated as unreliable with an error margin of at least one pixel!</p> +<p>The scaling values, if relevant, are determined first during a size changing operation. The remaining fields are then set by the driver. For scalable formats, they are usually set to scaled values of the corresponding fields in <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>. Some values like ascender or descender are rounded for historical reasons; more precise values (for outline fonts) can be derived by scaling the corresponding <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> values manually, with code similar to the following.</p> +<pre class="colored"> + scaled_ascender = FT_MulFix( face->ascender, + size_metrics->y_scale ); +</pre> +<p>Note that due to glyph hinting and the selected rendering mode these values are usually not exact; consequently, they must be treated as unreliable with an error margin of at least one pixel!</p> <p>Indeed, the only way to get the exact metrics is to render <i>all</i> glyphs. As this would be a definite performance hit, it is up to client applications to perform such computations.</p> -<p>The FT_Size_Metrics structure is valid for bitmap fonts also.</p> +<p>The ‘FT_Size_Metrics’ structure is valid for bitmap fonts also.</p> +<p><b>TrueType</b> <b>fonts</b> <b>with</b> <b>native</b> <b>bytecode</b> <b>hinting</b></p> +<p>All applications that handle TrueType fonts with native hinting must be aware that TTFs expect different rounding of vertical font dimensions. The application has to cater for this, especially if it wants to rely on a TTF's vertical data (for example, to properly align box characters vertically).</p> +<p>Only the application knows <i>in</i> <i>advance</i> that it is going to use native hinting for TTFs! FreeType, on the other hand, selects the hinting mode not at the time of creating an <a href="ft2-base_interface.html#FT_Size">FT_Size</a> object but much later, namely while calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> +<p>Here is some pseudo code that illustrates a possible solution.</p> +<pre class="colored"> + font_format = FT_Get_Font_Format( face ); + + if ( !strcmp( font_format, "TrueType" ) && + do_native_bytecode_hinting ) + { + ascender = ROUND( FT_MulFix( face->ascender, + size_metrics->y_scale ) ); + descender = ROUND( FT_MulFix( face->descender, + size_metrics->y_scale ) ); + } + else + { + ascender = size_metrics->ascender; + descender = size_metrics->descender; + } + + height = size_metrics->height; + max_advance = size_metrics->max_advance; +</pre> <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> @@ -891,19 +961,19 @@ <p>This shorthand is, depending on <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_IGNORE_TRANSFORM</a>, the transformed (hinted) advance width for the glyph, in 26.6 fractional pixel format. As specified with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a>, it uses either the ‘horiAdvance’ or the ‘vertAdvance’ value of ‘metrics’ field.</p> </td></tr> <tr><td class="val" id="format">format</td><td class="desc"> -<p>This field indicates the format of the image contained in the glyph slot. Typically <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a>, <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a>, or <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_COMPOSITE</a>, but others are possible.</p> +<p>This field indicates the format of the image contained in the glyph slot. Typically <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a>, <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a>, or <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_COMPOSITE</a>, but other values are possible.</p> </td></tr> <tr><td class="val" id="bitmap">bitmap</td><td class="desc"> -<p>This field is used as a bitmap descriptor when the slot format is <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a>. Note that the address and content of the bitmap buffer can change between calls of <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> and a few other functions.</p> +<p>This field is used as a bitmap descriptor. Note that the address and content of the bitmap buffer can change between calls of <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> and a few other functions.</p> </td></tr> <tr><td class="val" id="bitmap_left">bitmap_left</td><td class="desc"> -<p>The bitmap's left bearing expressed in integer pixels. Only valid if the format is <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a>, this is, if the glyph slot contains a bitmap.</p> +<p>The bitmap's left bearing expressed in integer pixels.</p> </td></tr> <tr><td class="val" id="bitmap_top">bitmap_top</td><td class="desc"> -<p>The bitmap's top bearing expressed in integer pixels. Remember that this is the distance from the baseline to the top-most glyph scanline, upwards y coordinates being <b>positive</b>.</p> +<p>The bitmap's top bearing expressed in integer pixels. This is the distance from the baseline to the top-most glyph scanline, upwards y coordinates being <b>positive</b>.</p> </td></tr> <tr><td class="val" id="outline">outline</td><td class="desc"> -<p>The outline descriptor for the current glyph image if its format is <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a>. Once a glyph is loaded, ‘outline’ can be transformed, distorted, embolded, etc. However, it must not be freed.</p> +<p>The outline descriptor for the current glyph image if its format is <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_OUTLINE</a>. Once a glyph is loaded, ‘outline’ can be transformed, distorted, emboldened, etc. However, it must not be freed.</p> </td></tr> <tr><td class="val" id="num_subglyphs">num_subglyphs</td><td class="desc"> <p>The number of subglyphs in a composite glyph. This field is only valid for the composite glyph format that should normally only be loaded with the <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_RECURSE</a> flag.</p> @@ -912,13 +982,13 @@ <p>An array of subglyph descriptors for composite glyphs. There are ‘num_subglyphs’ elements in there. Currently internal to FreeType.</p> </td></tr> <tr><td class="val" id="control_data">control_data</td><td class="desc"> -<p>Certain font drivers can also return the control data for a given glyph image (e.g. TrueType bytecode, Type 1 charstrings, etc.). This field is a pointer to such data.</p> +<p>Certain font drivers can also return the control data for a given glyph image (e.g. TrueType bytecode, Type 1 charstrings, etc.). This field is a pointer to such data; it is currently internal to FreeType.</p> </td></tr> <tr><td class="val" id="control_len">control_len</td><td class="desc"> -<p>This is the length in bytes of the control data.</p> +<p>This is the length in bytes of the control data. Currently internal to FreeType.</p> </td></tr> <tr><td class="val" id="other">other</td><td class="desc"> -<p>Really wicked formats can use this pointer to present their own glyph image to client applications. Note that the application needs to know about the image format.</p> +<p>Reserved.</p> </td></tr> <tr><td class="val" id="lsb_delta">lsb_delta</td><td class="desc"> <p>The difference between hinted and unhinted left side bearing while auto-hinting is active. Zero otherwise.</p> @@ -929,32 +999,53 @@ </table> <h4>note</h4> -<p>If <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> is called with default flags (see <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_DEFAULT</a>) the glyph image is loaded in the glyph slot in its native format (e.g., an outline glyph for TrueType and Type 1 formats).</p> -<p>This image can later be converted into a bitmap by calling <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>. This function finds the current renderer for the native image's format, then invokes it.</p> +<p>If <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> is called with default flags (see <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_DEFAULT</a>) the glyph image is loaded in the glyph slot in its native format (e.g., an outline glyph for TrueType and Type 1 formats). [Since 2.9] The prospective bitmap metrics are calculated according to <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_XXX</a> and other flags even for the outline glyph, even if <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_RENDER</a> is not set.</p> +<p>This image can later be converted into a bitmap by calling <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>. This function searches the current renderer for the native image's format, then invokes it.</p> <p>The renderer is in charge of transforming the native image through the slot's face transformation fields, then converting it into a bitmap that is returned in ‘slot->bitmap’.</p> <p>Note that ‘slot->bitmap_left’ and ‘slot->bitmap_top’ are also used to specify the position of the bitmap relative to the current pen position (e.g., coordinates (0,0) on the baseline). Of course, ‘slot->format’ is also changed to <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_BITMAP</a>.</p> -<p>Here is a small pseudo code fragment that shows how to use ‘lsb_delta’ and ‘rsb_delta’:</p> +<p>Here is a small pseudo code fragment that shows how to use ‘lsb_delta’ and ‘rsb_delta’ to do fractional positioning of glyphs:</p> <pre class="colored"> - FT_Pos origin_x = 0; - FT_Pos prev_rsb_delta = 0; + FT_GlyphSlot slot = face->glyph; + FT_Pos origin_x = 0; for all glyphs do - <compute kern between current and previous glyph and add it to - `origin_x'> + <load glyph with `FT_Load_Glyph'> + + FT_Outline_Translate( slot->outline, origin_x & 63, 0 ); + + <save glyph image, or render glyph, or ...> + + <compute kern between current and next glyph + and add it to `origin_x'> + + origin_x += slot->advance.x; + origin_x += slot->rsb_delta - slot->lsb_delta; + endfor +</pre> +<p>Here is another small pseudo code fragment that shows how to use ‘lsb_delta’ and ‘rsb_delta’ to improve integer positioning of glyphs:</p> +<pre class="colored"> + FT_GlyphSlot slot = face->glyph; + FT_Pos origin_x = 0; + FT_Pos prev_rsb_delta = 0; + + + for all glyphs do + <compute kern between current and previous glyph + and add it to `origin_x'> <load glyph with `FT_Load_Glyph'> - if ( prev_rsb_delta - face->glyph->lsb_delta >= 32 ) + if ( prev_rsb_delta - slot->lsb_delta > 32 ) origin_x -= 64; - else if ( prev_rsb_delta - face->glyph->lsb_delta < -32 ) + else if ( prev_rsb_delta - slot->lsb_delta < -31 ) origin_x += 64; - prev_rsb_delta = face->glyph->rsb_delta; + prev_rsb_delta = slot->rsb_delta; <save glyph image, or render glyph, or ...> - origin_x += face->glyph->advance.x; + origin_x += slot->advance.x; endfor </pre> <p>If you use strong auto-hinting, you <b>must</b> apply these delta values! Otherwise you will experience far too large inter-glyph spacing at small rendering sizes in most cases. Note that it doesn't harm to use the above code for other hinting modes also, since the delta values are zero then.</p> @@ -982,7 +1073,7 @@ } <b>FT_Glyph_Metrics</b>; </pre> -<p>A structure used to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> has been used while loading the glyph, values are expressed in font units instead.</p> +<p>A structure to model the metrics of a single glyph. The values are expressed in 26.6 fractional pixel format; if the flag <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> has been used while loading the glyph, values are expressed in font units instead.</p> <h4>fields</h4> <table class="fields"> @@ -1015,6 +1106,7 @@ <h4>note</h4> <p>If not disabled with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_HINTING</a>, the values represent dimensions of the hinted glyph (in case hinting is applicable).</p> <p>Stroking a glyph with an outside border does not increase ‘horiAdvance’ or ‘vertAdvance’; you have to manually adjust these values to account for the added width and height.</p> +<p>FreeType doesn't use the ‘VORG’ table data for CFF fonts because it doesn't have an interface to quickly retrieve the glyph height. The y coordinate of the vertical origin can be simply computed as ‘vertBearingY + height’ after loading a glyph.</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> @@ -1074,7 +1166,7 @@ </table> <h4>note</h4> -<p>Windows FNT: The nominal size given in a FNT font is not reliable. Thus when the driver finds it incorrect, it sets ‘size’ to some calculated values and sets ‘x_ppem’ and ‘y_ppem’ to the pixel width and height given in the font, respectively.</p> +<p>Windows FNT: The nominal size given in a FNT font is not reliable. If the driver finds it incorrect, it sets ‘size’ to some calculated values, and ‘x_ppem’ and ‘y_ppem’ to the pixel width and height given in the font, respectively.</p> <p>TrueType embedded bitmaps: ‘size’, ‘width’, and ‘height’ values are not contained in the bitmap strike itself. They are computed from the global font parameters.</p> <hr> @@ -1101,9 +1193,10 @@ <p>FreeType error code. 0 means success.</p> <h4>note</h4> -<p>In case you want to provide your own memory allocating routines, use <a href="ft2-module_management.html#FT_New_Library">FT_New_Library</a> instead, followed by a call to <a href="ft2-module_management.html#FT_Add_Default_Modules">FT_Add_Default_Modules</a> (or a series of calls to <a href="ft2-module_management.html#FT_Add_Module">FT_Add_Module</a>).</p> +<p>In case you want to provide your own memory allocating routines, use <a href="ft2-module_management.html#FT_New_Library">FT_New_Library</a> instead, followed by a call to <a href="ft2-module_management.html#FT_Add_Default_Modules">FT_Add_Default_Modules</a> (or a series of calls to <a href="ft2-module_management.html#FT_Add_Module">FT_Add_Module</a>) and <a href="ft2-module_management.html#FT_Set_Default_Properties">FT_Set_Default_Properties</a>.</p> <p>See the documentation of <a href="ft2-base_interface.html#FT_Library">FT_Library</a> and <a href="ft2-base_interface.html#FT_Face">FT_Face</a> for multi-threading issues.</p> <p>If you need reference-counting (cf. <a href="ft2-module_management.html#FT_Reference_Library">FT_Reference_Library</a>), use <a href="ft2-module_management.html#FT_New_Library">FT_New_Library</a> and <a href="ft2-module_management.html#FT_Done_Library">FT_Done_Library</a>.</p> +<p>If compilation option FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES is set, this function reads the ‘FREETYPE_PROPERTIES’ environment variable to control driver properties. See section ‘<a href="ft2-properties.html#properties">Driver properties</a>’ for more.</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> @@ -1142,7 +1235,7 @@ <a href="ft2-base_interface.html#FT_Face">FT_Face</a> *aface ); </pre> -<p>This function calls <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> to open a font by its pathname.</p> +<p>Call <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> to open a font by its pathname.</p> <h4>inout</h4> <table class="fields"> @@ -1242,7 +1335,7 @@ <a href="ft2-base_interface.html#FT_Face">FT_Face</a> *aface ); </pre> -<p>This function calls <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> to open a font that has been loaded into memory.</p> +<p>Call <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> to open a font that has been loaded into memory.</p> <h4>inout</h4> <table class="fields"> @@ -1281,6 +1374,85 @@ <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="FT_Face_Properties">FT_Face_Properties</h3> +<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> +<pre> + FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) + <b>FT_Face_Properties</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face, + <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> num_properties, + <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a>* properties ); +</pre> + +<p>Set or override certain (library or module-wide) properties on a face-by-face basis. Useful for finer-grained control and avoiding locks on shared structures (threads can modify their own faces as they see fit).</p> +<p>Contrary to <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a>, this function uses <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> so that you can pass multiple properties to the target face in one call. Note that only a subset of the available properties can be controlled.</p> +<p>* <a href="ft2-parameter_tags.html#FT_PARAM_TAG_STEM_DARKENING">FT_PARAM_TAG_STEM_DARKENING</a> (stem darkening, corresponding to the property ‘no-stem-darkening’ provided by the ‘autofit’, ‘cff’, ‘type1’, and ‘t1cid’ modules; see <a href="ft2-properties.html#no-stem-darkening">no-stem-darkening</a>).</p> +<p>* <a href="ft2-parameter_tags.html#FT_PARAM_TAG_LCD_FILTER_WEIGHTS">FT_PARAM_TAG_LCD_FILTER_WEIGHTS</a> (LCD filter weights, corresponding to function <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilterWeights">FT_Library_SetLcdFilterWeights</a>).</p> +<p>* <a href="ft2-parameter_tags.html#FT_PARAM_TAG_RANDOM_SEED">FT_PARAM_TAG_RANDOM_SEED</a> (seed value for the CFF, Type 1, and CID ‘random’ operator, corresponding to the ‘random-seed’ property provided by the ‘cff’, ‘type1’, and ‘t1cid’ modules; see <a href="ft2-properties.html#random-seed">random-seed</a>).</p> +<p>Pass NULL as ‘data’ in <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> for a given tag to reset the option and use the library or module default again.</p> + +<h4>input</h4> +<table class="fields"> +<tr><td class="val" id="face">face</td><td class="desc"> +<p>A handle to the source face object.</p> +</td></tr> +<tr><td class="val" id="num_properties">num_properties</td><td class="desc"> +<p>The number of properties that follow.</p> +</td></tr> +<tr><td class="val" id="properties">properties</td><td class="desc"> +<p>A handle to an <a href="ft2-base_interface.html#FT_Parameter">FT_Parameter</a> array with ‘num_properties’ elements.</p> +</td></tr> +</table> + +<h4>return</h4> +<p>FreeType error code. 0 means success.</p> + +<h4>note</h4> +<p>Here an example that sets three properties. You must define FT_CONFIG_OPTION_SUBPIXEL_RENDERING to make the LCD filter examples work.</p> +<pre class="colored"> + FT_Parameter property1; + FT_Bool darken_stems = 1; + + FT_Parameter property2; + FT_LcdFiveTapFilter custom_weight = + { 0x11, 0x44, 0x56, 0x44, 0x11 }; + + FT_Parameter property3; + FT_Int32 random_seed = 314159265; + + FT_Parameter properties[3] = { property1, + property2, + property3 }; + + + property1.tag = FT_PARAM_TAG_STEM_DARKENING; + property1.data = &darken_stems; + + property2.tag = FT_PARAM_TAG_LCD_FILTER_WEIGHTS; + property2.data = custom_weight; + + property3.tag = FT_PARAM_TAG_RANDOM_SEED; + property3.data = &random_seed; + + FT_Face_Properties( face, 3, properties ); +</pre> +<p>The next example resets a single property to its default value.</p> +<pre class="colored"> + FT_Parameter property; + + + property.tag = FT_PARAM_TAG_LCD_FILTER_WEIGHTS; + property.data = NULL; + + FT_Face_Properties( face, 1, &property ); +</pre> + +<h4>since</h4> +<p>2.8</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> + +<div class="section"> <h3 id="FT_Open_Face">FT_Open_Face</h3> <p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> <pre> @@ -1307,8 +1479,8 @@ </td></tr> <tr><td class="val" id="face_index">face_index</td><td class="desc"> <p>This field holds two different values. Bits 0-15 are the index of the face in the font file (starting with value 0). Set it to 0 if there is only one face in the font file.</p> -<p>Bits 16-30 are relevant to GX variation fonts only, specifying the named instance index for the current face index (starting with value 1; value 0 makes FreeType ignore named instances). For non-GX fonts, bits 16-30 are ignored. Assuming that you want to access the third named instance in face 4, ‘face_index’ should be set to 0x00030004. If you want to access face 4 without GX variation handling, simply set ‘face_index’ to value 4.</p> -<p>FT_Open_Face and its siblings can be used to quickly check whether the font format of a given font resource is supported by FreeType. In general, if the ‘face_index’ argument is negative, the function's return value is 0 if the font format is recognized, or non-zero otherwise. The function allocates a more or less empty face handle in ‘*aface’ (if ‘aface’ isn't NULL); the only two useful fields in this special case are ‘face->num_faces’ and ‘face->style_flags’. For any negative value of ‘face_index’, ‘face->num_faces’ gives the number of faces within the font file. For the negative value ‘-(N+1)’ (with ‘N’ a 16-bit value), bits 16-30 in ‘face->style_flags’ give the number of named instances in face ‘N’ if we have a GX variation font (or zero otherwise). After examination, the returned <a href="ft2-base_interface.html#FT_Face">FT_Face</a> structure should be deallocated with a call to <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a>.</p> +<p>[Since 2.6.1] Bits 16-30 are relevant to GX and OpenType variation fonts only, specifying the named instance index for the current face index (starting with value 1; value 0 makes FreeType ignore named instances). For non-variation fonts, bits 16-30 are ignored. Assuming that you want to access the third named instance in face 4, ‘face_index’ should be set to 0x00030004. If you want to access face 4 without variation handling, simply set ‘face_index’ to value 4.</p> +<p>‘FT_Open_Face’ and its siblings can be used to quickly check whether the font format of a given font resource is supported by FreeType. In general, if the ‘face_index’ argument is negative, the function's return value is 0 if the font format is recognized, or non-zero otherwise. The function allocates a more or less empty face handle in ‘*aface’ (if ‘aface’ isn't NULL); the only two useful fields in this special case are ‘face->num_faces’ and ‘face->style_flags’. For any negative value of ‘face_index’, ‘face->num_faces’ gives the number of faces within the font file. For the negative value ‘-(N+1)’ (with ‘N’ a non-negative 16-bit value), bits 16-30 in ‘face->style_flags’ give the number of named instances in face ‘N’ if we have a variation font (or zero otherwise). After examination, the returned <a href="ft2-base_interface.html#FT_Face">FT_Face</a> structure should be deallocated with a call to <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a>.</p> </td></tr> </table> @@ -1408,7 +1580,7 @@ } <b>FT_Open_Args</b>; </pre> -<p>A structure used to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> and <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a>.</p> +<p>A structure to indicate how to open a new font file or stream. A pointer to such a structure can be used as a parameter for the functions <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> and <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a>.</p> <h4>fields</h4> <table class="fields"> @@ -1428,7 +1600,7 @@ <p>A handle to a source stream object.</p> </td></tr> <tr><td class="val" id="driver">driver</td><td class="desc"> -<p>This field is exclusively used by <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>; it simply specifies the font driver to use to open the face. If set to 0, FreeType tries to load the face with each one of the drivers in its list.</p> +<p>This field is exclusively used by <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>; it simply specifies the font driver to use for opening the face. If set to NULL, FreeType tries to load the face with each one of the drivers in its list.</p> </td></tr> <tr><td class="val" id="num_params">num_params</td><td class="desc"> <p>The number of extra parameters.</p> @@ -1445,7 +1617,7 @@ <p>Otherwise, if the <a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_PATHNAME</a> bit is set, assume that this is a normal file and use ‘pathname’ to open it.</p> <p>If the <a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_DRIVER</a> bit is set, <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> only tries to open the file with the driver whose handler is in ‘driver’.</p> <p>If the <a href="ft2-base_interface.html#FT_OPEN_XXX">FT_OPEN_PARAMS</a> bit is set, the parameters given by ‘num_params’ and ‘params’ is used. They are ignored otherwise.</p> -<p>Ideally, both the ‘pathname’ and ‘params’ fields should be tagged as ‘const’; this is missing for API backwards compatibility. In other words, applications should treat them as read-only.</p> +<p>Ideally, both the ‘pathname’ and ‘params’ fields should be tagged as ‘const’; this is missing for API backward compatibility. In other words, applications should treat them as read-only.</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> @@ -1462,7 +1634,7 @@ } <b>FT_Parameter</b>; </pre> -<p>A simple structure used to pass more or less generic parameters to <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a>.</p> +<p>A simple structure to pass more or less generic parameters to <a href="ft2-base_interface.html#FT_Open_Face">FT_Open_Face</a> and <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a>.</p> <h4>fields</h4> <table class="fields"> @@ -1475,7 +1647,7 @@ </table> <h4>note</h4> -<p>The ID and function of parameters are driver-specific. See the various FT_PARAM_TAG_XXX flags for more information.</p> +<p>The ID and function of parameters are driver-specific. See section ‘<a href="ft2-parameter_tags.html#parameter_tags">Parameter Tags</a>’ for more information.</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> @@ -1489,7 +1661,7 @@ <span class="keyword">const</span> <span class="keyword">char</span>* filepathname ); </pre> -<p>This function calls <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a> to attach a file.</p> +<p>Call <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a> to attach a file.</p> <h4>inout</h4> <table class="fields"> @@ -1541,7 +1713,7 @@ <h4>note</h4> <p>The meaning of the ‘attach’ (i.e., what really happens when the new file is read) is not fixed by FreeType itself. It really depends on the font format (and thus the font driver).</p> -<p>Client applications are expected to know what they are doing when invoking this function. Most drivers simply do not implement file attachments.</p> +<p>Client applications are expected to know what they are doing when invoking this function. Most drivers simply do not implement file or stream attachments.</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> @@ -1558,7 +1730,7 @@ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> vert_resolution ); </pre> -<p>This function calls <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to request the nominal size (in points).</p> +<p>Call <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to request the nominal size (in points).</p> <h4>inout</h4> <table class="fields"> @@ -1587,6 +1759,7 @@ <p>FreeType error code. 0 means success.</p> <h4>note</h4> +<p>While this function allows fractional points as input values, the resulting ppem value for the given resolution is always rounded to the nearest integer.</p> <p>If either the character width or height is zero, it is set equal to the other value.</p> <p>If either the horizontal or vertical resolution is zero, it is set equal to the other value.</p> <p>A character width or height smaller than 1pt is set to 1pt; if both resolution values are zero, they are set to 72dpi.</p> @@ -1605,7 +1778,7 @@ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> pixel_height ); </pre> -<p>This function calls <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to request the nominal size (in pixels).</p> +<p>Call <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to request the nominal size (in pixels).</p> <h4>inout</h4> <table class="fields"> @@ -1628,7 +1801,7 @@ <p>FreeType error code. 0 means success.</p> <h4>note</h4> -<p>You should not rely on the resulting glyphs matching, or being constrained, to this pixel size. Refer to <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to understand how requested sizes relate to actual sizes.</p> +<p>You should not rely on the resulting glyphs matching or being constrained to this pixel size. Refer to <a href="ft2-base_interface.html#FT_Request_Size">FT_Request_Size</a> to understand how requested sizes relate to actual sizes.</p> <p>Don't use this function if you are using the FreeType cache API.</p> <hr> @@ -1664,7 +1837,8 @@ <h4>note</h4> <p>Although drivers may select the bitmap strike matching the request, you should not rely on this if you intend to select a particular bitmap strike. Use <a href="ft2-base_interface.html#FT_Select_Size">FT_Select_Size</a> instead in that case.</p> -<p>The relation between the requested size and the resulting glyph size is dependent entirely on how the size is defined in the source face. The font designer chooses the final size of each glyph relative to this size. For more information refer to ‘<a href="http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html">http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html</a>’</p> +<p>The relation between the requested size and the resulting glyph size is dependent entirely on how the size is defined in the source face. The font designer chooses the final size of each glyph relative to this size. For more information refer to ‘<a href="https://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html">https://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html</a>’.</p> +<p>Contrary to <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>, this function doesn't have special code to normalize zero-valued widths, heights, or resolutions (which lead to errors in most cases).</p> <p>Don't use this function if you are using the FreeType cache API.</p> <hr> @@ -1700,7 +1874,7 @@ <h4>note</h4> <p>For bitmaps embedded in outline fonts it is common that only a subset of the available glyphs at a given ppem value is available. FreeType silently uses outlines if there is no bitmap for a given glyph index.</p> -<p>For GX variation fonts, a bitmap strike makes sense only if the default instance is active (this is, no glyph variation takes place); otherwise, FreeType simply ignores bitmap strikes. The same is true for all named instances that are different from the default instance.</p> +<p>For GX and OpenType variation fonts, a bitmap strike makes sense only if the default instance is active (this is, no glyph variation takes place); otherwise, FreeType simply ignores bitmap strikes. The same is true for all named instances that are different from the default instance.</p> <p>Don't use this function if you are using the FreeType cache API.</p> <hr> @@ -1732,7 +1906,7 @@ <p>This is the standard scaling found in most applications. In particular, use this size request type for TrueType fonts if they provide optical scaling or something similar. Note, however, that ‘units_per_EM’ is a rather abstract value which bears no relation to the actual size of the glyphs in a font.</p> </td></tr> <tr><td class="val" id="FT_SIZE_REQUEST_TYPE_REAL_DIM">FT_SIZE_REQUEST_TYPE_REAL_DIM</td><td class="desc"> -<p>The real dimension. The sum of the ‘ascender’ and (minus of) the ‘descender’ fields of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> are used to determine both scaling values.</p> +<p>The real dimension. The sum of the ‘ascender’ and (minus of) the ‘descender’ fields of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> is used to determine both scaling values.</p> </td></tr> <tr><td class="val" id="FT_SIZE_REQUEST_TYPE_BBOX">FT_SIZE_REQUEST_TYPE_BBOX</td><td class="desc"> <p>The font bounding box. The width and height of the ‘bbox’ field of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> are used to determine the horizontal and vertical scaling value, respectively.</p> @@ -1767,7 +1941,7 @@ } <b>FT_Size_RequestRec</b>; </pre> -<p>A structure used to model a size request.</p> +<p>A structure to model a size request.</p> <h4>fields</h4> <table class="fields"> @@ -1781,15 +1955,15 @@ <p>The desired height, given as a 26.6 fractional point value (with 72pt = 1in).</p> </td></tr> <tr><td class="val" id="horiResolution">horiResolution</td><td class="desc"> -<p>The horizontal resolution (dpi, i.e., pixels per inch). If set to zero, ‘width’ is treated as a 26.6 fractional <b>pixel</b> value.</p> +<p>The horizontal resolution (dpi, i.e., pixels per inch). If set to zero, ‘width’ is treated as a 26.6 fractional <b>pixel</b> value, which gets internally rounded to an integer.</p> </td></tr> <tr><td class="val" id="vertResolution">vertResolution</td><td class="desc"> -<p>The vertical resolution (dpi, i.e., pixels per inch). If set to zero, ‘height’ is treated as a 26.6 fractional <b>pixel</b> value.</p> +<p>The vertical resolution (dpi, i.e., pixels per inch). If set to zero, ‘height’ is treated as a 26.6 fractional <b>pixel</b> value, which gets internally rounded to an integer.</p> </td></tr> </table> <h4>note</h4> -<p>If ‘width’ is zero, then the horizontal scaling value is set equal to the vertical scaling value, and vice versa.</p> +<p>If ‘width’ is zero, the horizontal scaling value is set equal to the vertical scaling value, and vice versa.</p> <p>If ‘type’ is FT_SIZE_REQUEST_TYPE_SCALES, ‘width’ and ‘height’ are interpreted directly as 16.16 fractional scaling values, without any further modification, and both ‘horiResolution’ and ‘vertResolution’ are ignored.</p> <hr> @@ -1817,7 +1991,7 @@ <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a>* delta ); </pre> -<p>A function used to set the transformation that is applied to glyph images when they are loaded into a glyph slot through <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> +<p>Set the transformation that is applied to glyph images when they are loaded into a glyph slot through <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> <h4>inout</h4> <table class="fields"> @@ -1829,10 +2003,10 @@ <h4>input</h4> <table class="fields"> <tr><td class="val" id="matrix">matrix</td><td class="desc"> -<p>A pointer to the transformation's 2x2 matrix. Use 0 for the identity matrix.</p> +<p>A pointer to the transformation's 2x2 matrix. Use NULL for the identity matrix.</p> </td></tr> <tr><td class="val" id="delta">delta</td><td class="desc"> -<p>A pointer to the translation vector. Use 0 for the null vector.</p> +<p>A pointer to the translation vector. Use NULL for the null vector.</p> </td></tr> </table> @@ -1853,7 +2027,7 @@ <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags ); </pre> -<p>A function used to load a single glyph into the glyph slot of a face object.</p> +<p>Load a glyph into the glyph slot of a face object.</p> <h4>inout</h4> <table class="fields"> @@ -1892,7 +2066,7 @@ <a href="ft2-basic_types.html#FT_ULong">FT_ULong</a> charcode ); </pre> -<p>Return the glyph index of a given character code. This function uses a charmap object to do the mapping.</p> +<p>Return the glyph index of a given character code. This function uses the currently selected charmap to do the mapping.</p> <h4>input</h4> <table class="fields"> @@ -1922,7 +2096,7 @@ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *agindex ); </pre> -<p>This function is used to return the first character code in the current charmap of a given face. It also returns the corresponding glyph index.</p> +<p>Return the first character code in the current charmap of a given face, together with its corresponding glyph index.</p> <h4>input</h4> <table class="fields"> @@ -1942,7 +2116,7 @@ <p>The charmap's first character code.</p> <h4>note</h4> -<p>You should use this function with <a href="ft2-base_interface.html#FT_Get_Next_Char">FT_Get_Next_Char</a> to be able to parse all character codes available in a given charmap. The code should look like this:</p> +<p>You should use this function together with <a href="ft2-base_interface.html#FT_Get_Next_Char">FT_Get_Next_Char</a> to parse all character codes available in a given charmap. The code should look like this:</p> <pre class="colored"> FT_ULong charcode; FT_UInt gindex; @@ -1972,7 +2146,7 @@ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> *agindex ); </pre> -<p>This function is used to return the next character code in the current charmap of a given face following the value ‘char_code’, as well as the corresponding glyph index.</p> +<p>Return the next character code in the current charmap of a given face following the value ‘char_code’, as well as the corresponding glyph index.</p> <h4>input</h4> <table class="fields"> @@ -1995,7 +2169,7 @@ <p>The charmap's next character code.</p> <h4>note</h4> -<p>You should use this function with <a href="ft2-base_interface.html#FT_Get_First_Char">FT_Get_First_Char</a> to walk over all character codes available in a given charmap. See the note for this function for a simple code example.</p> +<p>You should use this function with <a href="ft2-base_interface.html#FT_Get_First_Char">FT_Get_First_Char</a> to walk over all character codes available in a given charmap. See the note for that function for a simple code example.</p> <p>Note that ‘*agindex’ is set to 0 when there are no more codes in the charmap.</p> <hr> @@ -2010,7 +2184,7 @@ <a href="ft2-basic_types.html#FT_String">FT_String</a>* glyph_name ); </pre> -<p>Return the glyph index of a given glyph name. This function uses driver specific objects to do the translation.</p> +<p>Return the glyph index of a given glyph name.</p> <h4>input</h4> <table class="fields"> @@ -2038,7 +2212,7 @@ <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags ); </pre> -<p>A function used to load a single glyph into the glyph slot of a face object, according to its character code.</p> +<p>Load a glyph into the glyph slot of a face object, accessed by its character code.</p> <h4>inout</h4> <table class="fields"> @@ -2062,6 +2236,8 @@ <h4>note</h4> <p>This function simply calls <a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a> and <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> +<p>Many fonts contain glyphs that can't be loaded by this function since its glyph indices are not listed in any of the font's charmaps.</p> +<p>If no active cmap is set up (i.e., ‘face->charmap’ is zero), the call to <a href="ft2-base_interface.html#FT_Get_Char_Index">FT_Get_Char_Index</a> is omitted, and the function behaves identically to <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</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> @@ -2099,7 +2275,7 @@ <h4>input</h4> <table class="fields"> <tr><td class="val" id="render_mode">render_mode</td><td class="desc"> -<p>This is the render mode used to render the glyph image into a bitmap. See <a href="ft2-base_interface.html#FT_Render_Mode">FT_Render_Mode</a> for a list of possible values.</p> +<p>The render mode used to render the glyph image into a bitmap. See <a href="ft2-base_interface.html#FT_Render_Mode">FT_Render_Mode</a> for a list of possible values.</p> </td></tr> </table> @@ -2107,10 +2283,10 @@ <p>FreeType error code. 0 means success.</p> <h4>note</h4> -<p>To get meaningful results, font scaling values must be set with functions like <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a> before calling FT_Render_Glyph.</p> +<p>To get meaningful results, font scaling values must be set with functions like <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a> before calling ‘FT_Render_Glyph’.</p> <p>When FreeType outputs a bitmap of a glyph, it really outputs an alpha coverage map. If a pixel is completely covered by a filled-in outline, the bitmap contains 0xFF at that pixel, meaning that 0xFF/0xFF fraction of that pixel is covered, meaning the pixel is 100% black (or 0% bright). If a pixel is only 50% covered (value 0x80), the pixel is made 50% black (50% bright or a middle shade of grey). 0% covered means 0% black (100% bright or white).</p> <p>On high-DPI screens like on smartphones and tablets, the pixels are so small that their chance of being completely covered and therefore completely black are fairly good. On the low-DPI screens, however, the situation is different. The pixels are too large for most of the details of a glyph and shades of gray are the norm rather than the exception.</p> -<p>This is relevant because all our screens have a second problem: they are not linear. 1 + 1 is not 2. Twice the value does not result in twice the brightness. When a pixel is only 50% covered, the coverage map says 50% black, and this translates to a pixel value of 128 when you use 8 bits per channel (0-255). However, this does not translate to 50% brightness for that pixel on our sRGB and gamma 2.2 screens. Due to their non-linearity, they dwell longer in the darks and only a pixel value of about 186 results in 50% brightness – 128 ends up too dark on both bright and dark backgrounds. The net result is that dark text looks burnt-out, pixely and blotchy on bright background, bright text too frail on dark backgrounds, and colored text on colored background (for example, red on green) seems to have dark halos or ‘dirt’ around it. The situation is especially ugly for diagonal stems like in ‘w’ glyph shapes where the quality of FreeType's anti-aliasing depends on the correct display of grays. On high-DPI screens where smaller, fully black pixels reign supreme, this doesn't matter, but on our low-DPI screens with all the gray shades, it does. 0% and 100% brightness are the same things in linear and non-linear space, just all the shades in-between aren't.</p> +<p>This is relevant because all our screens have a second problem: they are not linear. 1 + 1 is not 2. Twice the value does not result in twice the brightness. When a pixel is only 50% covered, the coverage map says 50% black, and this translates to a pixel value of 128 when you use 8 bits per channel (0-255). However, this does not translate to 50% brightness for that pixel on our sRGB and gamma 2.2 screens. Due to their non-linearity, they dwell longer in the darks and only a pixel value of about 186 results in 50% brightness -- 128 ends up too dark on both bright and dark backgrounds. The net result is that dark text looks burnt-out, pixely and blotchy on bright background, bright text too frail on dark backgrounds, and colored text on colored background (for example, red on green) seems to have dark halos or ‘dirt’ around it. The situation is especially ugly for diagonal stems like in ‘w’ glyph shapes where the quality of FreeType's anti-aliasing depends on the correct display of grays. On high-DPI screens where smaller, fully black pixels reign supreme, this doesn't matter, but on our low-DPI screens with all the gray shades, it does. 0% and 100% brightness are the same things in linear and non-linear space, just all the shades in-between aren't.</p> <p>The blending function for placing text over a background is</p> <pre class="colored"> dst = alpha * src + (1 - alpha) * dst , @@ -2150,14 +2326,14 @@ #define ft_render_mode_mono <a href="ft2-base_interface.html#FT_RENDER_MODE_MONO">FT_RENDER_MODE_MONO</a> </pre> -<p>An enumeration type that lists the render modes supported by FreeType 2. Each mode corresponds to a specific type of scanline conversion performed on the outline.</p> +<p>Render modes supported by FreeType 2. Each mode corresponds to a specific type of scanline conversion performed on the outline.</p> <p>For bitmap fonts and embedded bitmaps the ‘bitmap->pixel_mode’ field in the <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> structure gives the format of the returned bitmap.</p> <p>All modes except <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_MONO</a> use 256 levels of opacity, indicating pixel coverage. Use linear alpha blending and gamma correction to correctly render non-monochrome glyph bitmaps onto a surface; see <a href="ft2-base_interface.html#FT_Render_Glyph">FT_Render_Glyph</a>.</p> <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_RENDER_MODE_NORMAL">FT_RENDER_MODE_NORMAL</td><td class="desc"> -<p>This is the default render mode; it corresponds to 8-bit anti-aliased bitmaps.</p> +<p>Default render mode; it corresponds to 8-bit anti-aliased bitmaps.</p> </td></tr> <tr><td class="val" id="FT_RENDER_MODE_LIGHT">FT_RENDER_MODE_LIGHT</td><td class="desc"> <p>This is equivalent to <a href="ft2-base_interface.html#FT_Render_Mode">FT_RENDER_MODE_NORMAL</a>. It is only defined as a separate value because render modes are also used indirectly to define hinting algorithm selectors. See <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_XXX</a> for details.</p> @@ -2166,15 +2342,15 @@ <p>This mode corresponds to 1-bit bitmaps (with 2 levels of opacity).</p> </td></tr> <tr><td class="val" id="FT_RENDER_MODE_LCD">FT_RENDER_MODE_LCD</td><td class="desc"> -<p>This mode corresponds to horizontal RGB and BGR sub-pixel displays like LCD screens. It produces 8-bit bitmaps that are 3 times the width of the original glyph outline in pixels, and which use the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD</a> mode.</p> +<p>This mode corresponds to horizontal RGB and BGR subpixel displays like LCD screens. It produces 8-bit bitmaps that are 3 times the width of the original glyph outline in pixels, and which use the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD</a> mode.</p> </td></tr> <tr><td class="val" id="FT_RENDER_MODE_LCD_V">FT_RENDER_MODE_LCD_V</td><td class="desc"> -<p>This mode corresponds to vertical RGB and BGR sub-pixel displays (like PDA screens, rotated LCD displays, etc.). It produces 8-bit bitmaps that are 3 times the height of the original glyph outline in pixels and use the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD_V</a> mode.</p> +<p>This mode corresponds to vertical RGB and BGR subpixel displays (like PDA screens, rotated LCD displays, etc.). It produces 8-bit bitmaps that are 3 times the height of the original glyph outline in pixels and use the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_LCD_V</a> mode.</p> </td></tr> </table> <h4>note</h4> -<p>The LCD-optimized glyph bitmaps produced by FT_Render_Glyph can be filtered to reduce color-fringes by using <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a> (not active in the default builds). It is up to the caller to either call <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a> (if available) or do the filtering itself.</p> +<p>Should you define FT_CONFIG_OPTION_SUBPIXEL_RENDERING in your ‘ftoption.h’, which enables patented ClearType-style rendering, the LCD-optimized glyph bitmaps should be filtered to reduce color fringes inherent to this technology. You can either set up LCD filtering with <a href="ft2-lcd_filtering.html#FT_Library_SetLcdFilter">FT_Library_SetLcdFilter</a> or <a href="ft2-base_interface.html#FT_Face_Properties">FT_Face_Properties</a>, or do the filtering yourself. The default FreeType LCD rendering technology does not require filtering.</p> <p>The selected render mode only affects vector glyphs of a font. Embedded bitmaps often have a different pixel mode like <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_MONO</a>. You can use <a href="ft2-bitmap_handling.html#FT_Bitmap_Convert">FT_Bitmap_Convert</a> to transform them into 8-bit pixmaps.</p> <hr> @@ -2192,7 +2368,7 @@ <a href="ft2-basic_types.html#FT_Vector">FT_Vector</a> *akerning ); </pre> -<p>Return the kerning vector between two glyphs of a same face.</p> +<p>Return the kerning vector between two glyphs of the same face.</p> <h4>input</h4> <table class="fields"> @@ -2222,6 +2398,7 @@ <h4>note</h4> <p>Only horizontal layouts (left-to-right & right-to-left) are supported by this method. Other layouts, or more sophisticated kernings, are out of the scope of this API function -- they can be implemented through format-specific interfaces.</p> +<p>Kerning for OpenType fonts implemented in a ‘GPOS’ table is not supported; use <a href="ft2-base_interface.html#FT_HAS_KERNING">FT_HAS_KERNING</a> to find out whether a font has data that can be extracted with ‘FT_Get_Kerning’.</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> @@ -2232,7 +2409,7 @@ <pre> <span class="keyword">typedef</span> <span class="keyword">enum</span> FT_Kerning_Mode_ { - <a href="ft2-base_interface.html#FT_KERNING_DEFAULT">FT_KERNING_DEFAULT</a> = 0, + <a href="ft2-base_interface.html#FT_KERNING_DEFAULT">FT_KERNING_DEFAULT</a> = 0, <a href="ft2-base_interface.html#FT_KERNING_UNFITTED">FT_KERNING_UNFITTED</a>, <a href="ft2-base_interface.html#FT_KERNING_UNSCALED">FT_KERNING_UNSCALED</a> @@ -2246,15 +2423,15 @@ #define ft_kerning_unscaled <a href="ft2-base_interface.html#FT_KERNING_UNSCALED">FT_KERNING_UNSCALED</a> </pre> -<p>An enumeration used to specify which kerning values to return in <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a>.</p> +<p>An enumeration to specify the format of kerning values returned by <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a>.</p> <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_KERNING_DEFAULT">FT_KERNING_DEFAULT</td><td class="desc"> -<p>Return grid-fitted kerning distances in pixels (value is 0). Whether they are scaled depends on <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a>.</p> +<p>Return grid-fitted kerning distances in 26.6 fractional pixels.</p> </td></tr> <tr><td class="val" id="FT_KERNING_UNFITTED">FT_KERNING_UNFITTED</td><td class="desc"> -<p>Return un-grid-fitted kerning distances in 26.6 fractional pixels. Whether they are scaled depends on <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a>.</p> +<p>Return un-grid-fitted kerning distances in 26.6 fractional pixels.</p> </td></tr> <tr><td class="val" id="FT_KERNING_UNSCALED">FT_KERNING_UNSCALED</td><td class="desc"> <p>Return the kerning vector in original font units.</p> @@ -2263,6 +2440,7 @@ <h4>note</h4> <p>FT_KERNING_DEFAULT returns full pixel values; it also makes FreeType heuristically scale down kerning distances at small ppem values so that they don't become too big.</p> +<p>Both FT_KERNING_DEFAULT and FT_KERNING_UNFITTED use the current horizontal scaling factor (as set e.g. with <a href="ft2-base_interface.html#FT_Set_Char_Size">FT_Set_Char_Size</a>) to convert font units to pixels.</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> @@ -2305,7 +2483,7 @@ <h4>note</h4> <p>Currently, only the Type 1 font driver supports track kerning, using data from AFM files (if attached with <a href="ft2-base_interface.html#FT_Attach_File">FT_Attach_File</a> or <a href="ft2-base_interface.html#FT_Attach_Stream">FT_Attach_Stream</a>).</p> -<p>Only very few AFM files come with track kerning data; please refer to the Adobe's AFM specification for more details.</p> +<p>Only very few AFM files come with track kerning data; please refer to Adobe's AFM specification for more details.</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> @@ -2363,7 +2541,7 @@ <b>FT_Get_Postscript_Name</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face ); </pre> -<p>Retrieve the ASCII PostScript name of a given face, if available. This only works with PostScript and TrueType fonts.</p> +<p>Retrieve the ASCII PostScript name of a given face, if available. This only works with PostScript, TrueType, and OpenType fonts.</p> <h4>input</h4> <table class="fields"> @@ -2377,6 +2555,9 @@ <h4>note</h4> <p>The returned pointer is owned by the face and is destroyed with it.</p> +<p>For variation fonts, this string changes if you select a different instance, and you have to call ‘FT_Get_PostScript_Name’ again to retrieve it. FreeType follows Adobe TechNote #5902, ‘Generating PostScript Names for Fonts Using OpenType Font Variations’.</p> +<p><a href="https://download.macromedia.com/pub/developer/opentype/tech-notes/5902.AdobePSNameGeneration.html">https://download.macromedia.com/pub/developer/opentype/tech-notes/5902.AdobePSNameGeneration.html</a></p> +<p>[Since 2.9] Special PostScript names for named instances are only returned if the named instance is set with <a href="ft2-multiple_masters.html#FT_Set_Named_Instance">FT_Set_Named_Instance</a> (and the font has corresponding entries in its ‘fvar’ table). If <a href="ft2-base_interface.html#FT_IS_VARIATION">FT_IS_VARIATION</a> returns true, the algorithmically derived PostScript name is provided, not looking up special entries for named instances.</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> @@ -2406,10 +2587,10 @@ <p>An <a href="ft2-base_interface.html#FT_Encoding">FT_Encoding</a> tag identifying the charmap. Use this with <a href="ft2-base_interface.html#FT_Select_Charmap">FT_Select_Charmap</a>.</p> </td></tr> <tr><td class="val" id="platform_id">platform_id</td><td class="desc"> -<p>An ID number describing the platform for the following encoding ID. This comes directly from the TrueType specification and should be emulated for other formats.</p> +<p>An ID number describing the platform for the following encoding ID. This comes directly from the TrueType specification and gets emulated for other formats.</p> </td></tr> <tr><td class="val" id="encoding_id">encoding_id</td><td class="desc"> -<p>A platform specific encoding number. This also comes from the TrueType specification and should be emulated similarly.</p> +<p>A platform specific encoding number. This also comes from the TrueType specification and gets emulated similarly.</p> </td></tr> </table> @@ -2481,7 +2662,7 @@ <h4>note</h4> <p>This function returns an error if the charmap is not part of the face (i.e., if it is not listed in the ‘face->charmaps’ table).</p> -<p>It also fails if a type 14 charmap is selected.</p> +<p>It also fails if an OpenType type 14 charmap is selected (which doesn't map character codes to glyph indices at all).</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> @@ -2517,7 +2698,7 @@ <b>FT_Get_FSType_Flags</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face ); </pre> -<p>Return the fsType flags for a font.</p> +<p>Return the ‘fsType’ flags for a font.</p> <h4>input</h4> <table class="fields"> @@ -2527,7 +2708,7 @@ </table> <h4>return</h4> -<p>The fsType flags, <a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_XXX</a>.</p> +<p>The ‘fsType’ flags, see <a href="ft2-base_interface.html#FT_FSTYPE_XXX">FT_FSTYPE_XXX</a>.</p> <h4>note</h4> <p>Use this function rather than directly reading the ‘fs_type’ field in the <a href="ft2-type1_tables.html#PS_FontInfoRec">PS_FontInfoRec</a> structure, which is only guaranteed to return the correct results for Type 1 fonts.</p> @@ -2587,7 +2768,7 @@ <p>FreeType error code. 0 means success.</p> <h4>note</h4> -<p>The values of ‘*p_arg1’, ‘*p_arg2’, and ‘*p_transform’ must be interpreted depending on the flags returned in ‘*p_flags’. See the TrueType specification for details.</p> +<p>The values of ‘*p_arg1’, ‘*p_arg2’, and ‘*p_transform’ must be interpreted depending on the flags returned in ‘*p_flags’. See the OpenType specification for details.</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> @@ -2599,7 +2780,7 @@ <span class="keyword">typedef</span> <span class="keyword">struct</span> FT_Face_InternalRec_* <b>FT_Face_Internal</b>; </pre> -<p>An opaque handle to an ‘FT_Face_InternalRec’ structure, used to model private data of a given <a href="ft2-base_interface.html#FT_Face">FT_Face</a> object.</p> +<p>An opaque handle to an ‘FT_Face_InternalRec’ structure that models the private data of a given <a href="ft2-base_interface.html#FT_Face">FT_Face</a> object.</p> <p>This structure might change between releases of FreeType 2 and is not generally available to client applications.</p> <hr> @@ -2648,6 +2829,7 @@ #define <a href="ft2-base_interface.html#FT_FACE_FLAG_CID_KEYED">FT_FACE_FLAG_CID_KEYED</a> ( 1L << 12 ) #define <a href="ft2-base_interface.html#FT_FACE_FLAG_TRICKY">FT_FACE_FLAG_TRICKY</a> ( 1L << 13 ) #define <a href="ft2-base_interface.html#FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</a> ( 1L << 14 ) +#define <a href="ft2-base_interface.html#FT_FACE_FLAG_VARIATION">FT_FACE_FLAG_VARIATION</a> ( 1L << 15 ) </pre> <p>A list of bit flags used in the ‘face_flags’ field of the <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a> structure. They inform client applications of properties of the corresponding face.</p> @@ -2655,52 +2837,56 @@ <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_FACE_FLAG_SCALABLE">FT_FACE_FLAG_SCALABLE</td><td class="desc"> -<p>Indicates that the face contains outline glyphs. This doesn't prevent bitmap strikes, i.e., a face can have both this and <a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_FIXED_SIZES</a> set.</p> +<p>The face contains outline glyphs. Note that a face can contain bitmap strikes also, i.e., a face can have both this flag and <a href="ft2-base_interface.html#FT_FACE_FLAG_XXX">FT_FACE_FLAG_FIXED_SIZES</a> set.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_FIXED_SIZES">FT_FACE_FLAG_FIXED_SIZES</td><td class="desc"> -<p>Indicates that the face contains bitmap strikes. See also the ‘num_fixed_sizes’ and ‘available_sizes’ fields of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> +<p>The face contains bitmap strikes. See also the ‘num_fixed_sizes’ and ‘available_sizes’ fields of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_FIXED_WIDTH">FT_FACE_FLAG_FIXED_WIDTH</td><td class="desc"> -<p>Indicates that the face contains fixed-width characters (like Courier, Lucido, MonoType, etc.).</p> +<p>The face contains fixed-width characters (like Courier, Lucida, MonoType, etc.).</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_SFNT">FT_FACE_FLAG_SFNT</td><td class="desc"> -<p>Indicates that the face uses the ‘sfnt’ storage scheme. For now, this means TrueType and OpenType.</p> +<p>The face uses the SFNT storage scheme. For now, this means TrueType and OpenType.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_HORIZONTAL">FT_FACE_FLAG_HORIZONTAL</td><td class="desc"> -<p>Indicates that the face contains horizontal glyph metrics. This should be set for all common formats.</p> +<p>The face contains horizontal glyph metrics. This should be set for all common formats.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_VERTICAL">FT_FACE_FLAG_VERTICAL</td><td class="desc"> -<p>Indicates that the face contains vertical glyph metrics. This is only available in some formats, not all of them.</p> +<p>The face contains vertical glyph metrics. This is only available in some formats, not all of them.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_KERNING">FT_FACE_FLAG_KERNING</td><td class="desc"> -<p>Indicates that the face contains kerning information. If set, the kerning distance can be retrieved through the function <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a>. Otherwise the function always return the vector (0,0). Note that FreeType doesn't handle kerning data from the ‘GPOS’ table (as present in some OpenType fonts).</p> +<p>The face contains kerning information. If set, the kerning distance can be retrieved using the function <a href="ft2-base_interface.html#FT_Get_Kerning">FT_Get_Kerning</a>. Otherwise the function always return the vector (0,0). Note that FreeType doesn't handle kerning data from the SFNT ‘GPOS’ table (as present in many OpenType fonts).</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_FAST_GLYPHS">FT_FACE_FLAG_FAST_GLYPHS</td><td class="desc"> <p>THIS FLAG IS DEPRECATED. DO NOT USE OR TEST IT.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_MULTIPLE_MASTERS">FT_FACE_FLAG_MULTIPLE_MASTERS</td><td class="desc"> -<p>Indicates that the font contains multiple masters and is capable of interpolating between them. See the multiple-masters specific API for details.</p> +<p>The face contains multiple masters and is capable of interpolating between them. Supported formats are Adobe MM, TrueType GX, and OpenType variation fonts.</p> +<p>See section ‘<a href="ft2-multiple_masters.html#multiple_masters">Multiple Masters</a>’ for API details.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_GLYPH_NAMES">FT_FACE_FLAG_GLYPH_NAMES</td><td class="desc"> -<p>Indicates that the font contains glyph names that can be retrieved through <a href="ft2-base_interface.html#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a>. Note that some TrueType fonts contain broken glyph name tables. Use the function <a href="ft2-type1_tables.html#FT_Has_PS_Glyph_Names">FT_Has_PS_Glyph_Names</a> when needed.</p> +<p>The face contains glyph names, which can be retrieved using <a href="ft2-base_interface.html#FT_Get_Glyph_Name">FT_Get_Glyph_Name</a>. Note that some TrueType fonts contain broken glyph name tables. Use the function <a href="ft2-type1_tables.html#FT_Has_PS_Glyph_Names">FT_Has_PS_Glyph_Names</a> when needed.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_EXTERNAL_STREAM">FT_FACE_FLAG_EXTERNAL_STREAM</td><td class="desc"> <p>Used internally by FreeType to indicate that a face's stream was provided by the client application and should not be destroyed when <a href="ft2-base_interface.html#FT_Done_Face">FT_Done_Face</a> is called. Don't read or test this flag.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_HINTER">FT_FACE_FLAG_HINTER</td><td class="desc"> -<p>Set if the font driver has a hinting machine of its own. For example, with TrueType fonts, it makes sense to use data from the SFNT ‘gasp’ table only if the native TrueType hinting engine (with the bytecode interpreter) is available and active.</p> +<p>The font driver has a hinting machine of its own. For example, with TrueType fonts, it makes sense to use data from the SFNT ‘gasp’ table only if the native TrueType hinting engine (with the bytecode interpreter) is available and active.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_CID_KEYED">FT_FACE_FLAG_CID_KEYED</td><td class="desc"> -<p>Set if the font is CID-keyed. In that case, the font is not accessed by glyph indices but by CID values. For subsetted CID-keyed fonts this has the consequence that not all index values are a valid argument to FT_Load_Glyph. Only the CID values for which corresponding glyphs in the subsetted font exist make FT_Load_Glyph return successfully; in all other cases you get an ‘FT_Err_Invalid_Argument’ error.</p> -<p>Note that CID-keyed fonts that are in an SFNT wrapper don't have this flag set since the glyphs are accessed in the normal way (using contiguous indices); the ‘CID-ness’ isn't visible to the application.</p> +<p>The face is CID-keyed. In that case, the face is not accessed by glyph indices but by CID values. For subsetted CID-keyed fonts this has the consequence that not all index values are a valid argument to <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>. Only the CID values for which corresponding glyphs in the subsetted font exist make ‘FT_Load_Glyph’ return successfully; in all other cases you get an ‘FT_Err_Invalid_Argument’ error.</p> +<p>Note that CID-keyed fonts that are in an SFNT wrapper (this is, all OpenType/CFF fonts) don't have this flag set since the glyphs are accessed in the normal way (using contiguous indices); the ‘CID-ness’ isn't visible to the application.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_TRICKY">FT_FACE_FLAG_TRICKY</td><td class="desc"> -<p>Set if the font is ‘tricky’, this is, it always needs the font format's native hinting engine to get a reasonable result. A typical example is the Chinese font ‘mingli.ttf’ that uses TrueType bytecode instructions to move and scale all of its subglyphs.</p> +<p>The face is ‘tricky’, this is, it always needs the font format's native hinting engine to get a reasonable result. A typical example is the old Chinese font ‘mingli.ttf’ (but not ‘mingliu.ttc’) that uses TrueType bytecode instructions to move and scale all of its subglyphs.</p> <p>It is not possible to auto-hint such fonts using <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_FORCE_AUTOHINT</a>; it will also ignore <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_HINTING</a>. You have to set both <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_HINTING</a> and <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_AUTOHINT</a> to really disable hinting; however, you probably never want this except for demonstration purposes.</p> <p>Currently, there are about a dozen TrueType fonts in the list of tricky fonts; they are hard-coded in file ‘ttobjs.c’.</p> </td></tr> <tr><td class="val" id="FT_FACE_FLAG_COLOR">FT_FACE_FLAG_COLOR</td><td class="desc"> -<p>Set if the font has color glyph tables. To access color glyphs use <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_COLOR</a>.</p> +<p>[Since 2.5.1] The face has color glyph tables. To access color glyphs use <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_COLOR</a>.</p> +</td></tr> +<tr><td class="val" id="FT_FACE_FLAG_VARIATION">FT_FACE_FLAG_VARIATION</td><td class="desc"> +<p>[Since 2.9] Set if the current face (or named instance) has been altered with <a href="ft2-multiple_masters.html#FT_Set_MM_Design_Coordinates">FT_Set_MM_Design_Coordinates</a>, <a href="ft2-multiple_masters.html#FT_Set_Var_Design_Coordinates">FT_Set_Var_Design_Coordinates</a>, or <a href="ft2-multiple_masters.html#FT_Set_Var_Blend_Coordinates">FT_Set_Var_Blend_Coordinates</a>. This flag is unset by a call to <a href="ft2-multiple_masters.html#FT_Set_Named_Instance">FT_Set_Named_Instance</a>.</p> </td></tr> </table> @@ -2715,15 +2901,15 @@ #define <a href="ft2-base_interface.html#FT_STYLE_FLAG_BOLD">FT_STYLE_FLAG_BOLD</a> ( 1 << 1 ) </pre> -<p>A list of bit flags used to indicate the style of a given face. These are used in the ‘style_flags’ field of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> +<p>A list of bit flags to indicate the style of a given face. These are used in the ‘style_flags’ field of <a href="ft2-base_interface.html#FT_FaceRec">FT_FaceRec</a>.</p> <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_STYLE_FLAG_ITALIC">FT_STYLE_FLAG_ITALIC</td><td class="desc"> -<p>Indicates that a given face style is italic or oblique.</p> +<p>The face style is italic or oblique.</p> </td></tr> <tr><td class="val" id="FT_STYLE_FLAG_BOLD">FT_STYLE_FLAG_BOLD</td><td class="desc"> -<p>Indicates that a given face is bold.</p> +<p>The face is bold.</p> </td></tr> </table> @@ -2799,21 +2985,21 @@ #define <a href="ft2-base_interface.html#FT_LOAD_MONOCHROME">FT_LOAD_MONOCHROME</a> ( 1L << 12 ) #define <a href="ft2-base_interface.html#FT_LOAD_LINEAR_DESIGN">FT_LOAD_LINEAR_DESIGN</a> ( 1L << 13 ) #define <a href="ft2-base_interface.html#FT_LOAD_NO_AUTOHINT">FT_LOAD_NO_AUTOHINT</a> ( 1L << 15 ) - /* Bits 16..19 are used by `FT_LOAD_TARGET_' */ + /* Bits 16-19 are used by `FT_LOAD_TARGET_' */ #define <a href="ft2-base_interface.html#FT_LOAD_COLOR">FT_LOAD_COLOR</a> ( 1L << 20 ) #define <a href="ft2-base_interface.html#FT_LOAD_COMPUTE_METRICS">FT_LOAD_COMPUTE_METRICS</a> ( 1L << 21 ) #define <a href="ft2-base_interface.html#FT_LOAD_BITMAP_METRICS_ONLY">FT_LOAD_BITMAP_METRICS_ONLY</a> ( 1L << 22 ) </pre> -<p>A list of bit field constants used with <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> to indicate what kind of operations to perform during glyph loading.</p> +<p>A list of bit field constants for <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a> to indicate what kind of operations to perform during glyph loading.</p> <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_LOAD_DEFAULT">FT_LOAD_DEFAULT</td><td class="desc"> <p>Corresponding to 0, this value is used as the default glyph load operation. In this case, the following happens:</p> <p>1. FreeType looks for a bitmap for the glyph corresponding to the face's current size. If one is found, the function returns. The bitmap data can be accessed from the glyph slot (see note below).</p> -<p>2. If no embedded bitmap is searched or found, FreeType looks for a scalable outline. If one is found, it is loaded from the font file, scaled to device pixels, then ‘hinted’ to the pixel grid in order to optimize it. The outline data can be accessed from the glyph slot (see note below).</p> -<p>Note that by default, the glyph loader doesn't render outlines into bitmaps. The following flags are used to modify this default behaviour to more specific and useful cases.</p> +<p>2. If no embedded bitmap is searched for or found, FreeType looks for a scalable outline. If one is found, it is loaded from the font file, scaled to device pixels, then ‘hinted’ to the pixel grid in order to optimize it. The outline data can be accessed from the glyph slot (see note below).</p> +<p>Note that by default the glyph loader doesn't render outlines into bitmaps. The following flags are used to modify this default behaviour to more specific and useful cases.</p> </td></tr> <tr><td class="val" id="FT_LOAD_NO_SCALE">FT_LOAD_NO_SCALE</td><td class="desc"> <p>Don't scale the loaded outline glyph but keep it in font units.</p> @@ -2837,38 +3023,38 @@ <p>In case <a href="ft2-base_interface.html#FT_HAS_VERTICAL">FT_HAS_VERTICAL</a> doesn't return true, you shouldn't use this flag currently. Reason is that in this case vertical metrics get synthesized, and those values are not always consistent across various font formats.</p> </td></tr> <tr><td class="val" id="FT_LOAD_FORCE_AUTOHINT">FT_LOAD_FORCE_AUTOHINT</td><td class="desc"> -<p>Indicates that the auto-hinter is preferred over the font's native hinter. See also the note below.</p> +<p>Prefer the auto-hinter over the font's native hinter. See also the note below.</p> </td></tr> <tr><td class="val" id="FT_LOAD_PEDANTIC">FT_LOAD_PEDANTIC</td><td class="desc"> -<p>Indicates that the font driver should perform pedantic verifications during glyph loading. This is mostly used to detect broken glyphs in fonts. By default, FreeType tries to handle broken fonts also.</p> +<p>Make the font driver perform pedantic verifications during glyph loading. This is mostly used to detect broken glyphs in fonts. By default, FreeType tries to handle broken fonts also.</p> <p>In particular, errors from the TrueType bytecode engine are not passed to the application if this flag is not set; this might result in partially hinted or distorted glyphs in case a glyph's bytecode is buggy.</p> </td></tr> <tr><td class="val" id="FT_LOAD_NO_RECURSE">FT_LOAD_NO_RECURSE</td><td class="desc"> -<p>Indicate that the font driver should not load composite glyphs recursively. Instead, it should set the ‘num_subglyph’ and ‘subglyphs’ values of the glyph slot accordingly, and set ‘glyph->format’ to <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_COMPOSITE</a>. The description of subglyphs can then be accessed with <a href="ft2-base_interface.html#FT_Get_SubGlyph_Info">FT_Get_SubGlyph_Info</a>.</p> +<p>Don't load composite glyphs recursively. Instead, the font driver should set the ‘num_subglyph’ and ‘subglyphs’ values of the glyph slot accordingly, and set ‘glyph->format’ to <a href="ft2-basic_types.html#FT_Glyph_Format">FT_GLYPH_FORMAT_COMPOSITE</a>. The description of subglyphs can then be accessed with <a href="ft2-base_interface.html#FT_Get_SubGlyph_Info">FT_Get_SubGlyph_Info</a>.</p> <p>This flag implies <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> and <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_IGNORE_TRANSFORM</a>.</p> </td></tr> <tr><td class="val" id="FT_LOAD_IGNORE_TRANSFORM">FT_LOAD_IGNORE_TRANSFORM</td><td class="desc"> -<p>Indicates that the transform matrix set by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a> should be ignored.</p> +<p>Ignore the transform matrix set by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p> </td></tr> <tr><td class="val" id="FT_LOAD_MONOCHROME">FT_LOAD_MONOCHROME</td><td class="desc"> <p>This flag is used with <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_RENDER</a> to indicate that you want to render an outline glyph to a 1-bit monochrome bitmap glyph, with 8 pixels packed into each byte of the bitmap data.</p> <p>Note that this has no effect on the hinting algorithm used. You should rather use <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_MONO</a> so that the monochrome-optimized hinting algorithm is used.</p> </td></tr> <tr><td class="val" id="FT_LOAD_LINEAR_DESIGN">FT_LOAD_LINEAR_DESIGN</td><td class="desc"> -<p>Indicates that the ‘linearHoriAdvance’ and ‘linearVertAdvance’ fields of <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> should be kept in font units. See <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> for details.</p> +<p>Keep ‘linearHoriAdvance’ and ‘linearVertAdvance’ fields of <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> in font units. See <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a> for details.</p> </td></tr> <tr><td class="val" id="FT_LOAD_NO_AUTOHINT">FT_LOAD_NO_AUTOHINT</td><td class="desc"> -<p>Disable auto-hinter. See also the note below.</p> +<p>Disable the auto-hinter. See also the note below.</p> </td></tr> <tr><td class="val" id="FT_LOAD_COLOR">FT_LOAD_COLOR</td><td class="desc"> -<p>This flag is used to request loading of color embedded-bitmap images. The resulting color bitmaps, if available, will have the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_BGRA</a> format. When the flag is not used and color bitmaps are found, they will be converted to 256-level gray bitmaps transparently. Those bitmaps will be in the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a> format.</p> +<p>[Since 2.5] Load embedded color bitmap images. The resulting color bitmaps, if available, will have the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_BGRA</a> format. If the flag is not set and color bitmaps are found, they are converted to 256-level gray bitmaps transparently, using the <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_GRAY</a> format.</p> </td></tr> <tr><td class="val" id="FT_LOAD_COMPUTE_METRICS">FT_LOAD_COMPUTE_METRICS</td><td class="desc"> -<p>This flag sets computing glyph metrics without the use of bundled metrics tables (for example, the ‘hdmx’ table in TrueType fonts). Well-behaving fonts have optimized bundled metrics and these should be used. This flag is mainly used by font validating or font editing applications, which need to ignore, verify, or edit those tables.</p> +<p>[Since 2.6.1] Compute glyph metrics from the glyph data, without the use of bundled metrics tables (for example, the ‘hdmx’ table in TrueType fonts). This flag is mainly used by font validating or font editing applications, which need to ignore, verify, or edit those tables.</p> <p>Currently, this flag is only implemented for TrueType fonts.</p> </td></tr> <tr><td class="val" id="FT_LOAD_BITMAP_METRICS_ONLY">FT_LOAD_BITMAP_METRICS_ONLY</td><td class="desc"> -<p>This flag is used to request loading of the metrics and bitmap image information of a (possibly embedded) bitmap glyph without allocating or copying the bitmap image data itself. No effect if the target glyph is not a bitmap image.</p> +<p>[Since 2.7.1] Request loading of the metrics and bitmap image information of a (possibly embedded) bitmap glyph without allocating or copying the bitmap image data itself. No effect if the target glyph is not a bitmap image.</p> <p>This flag unsets <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_RENDER</a>.</p> </td></tr> <tr><td class="val" id="FT_LOAD_CROP_BITMAP">FT_LOAD_CROP_BITMAP</td><td class="desc"> @@ -2901,22 +3087,24 @@ #define <a href="ft2-base_interface.html#FT_LOAD_TARGET_LCD_V">FT_LOAD_TARGET_LCD_V</a> FT_LOAD_TARGET_( <a href="ft2-base_interface.html#FT_RENDER_MODE_LCD_V">FT_RENDER_MODE_LCD_V</a> ) </pre> -<p>A list of values that are used to select a specific hinting algorithm to use by the hinter. You should OR one of these values to your ‘load_flags’ when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> -<p>Note that font's native hinters may ignore the hinting algorithm you have specified (e.g., the TrueType bytecode interpreter). You can set <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_FORCE_AUTOHINT</a> to ensure that the auto-hinter is used.</p> +<p>A list of values to select a specific hinting algorithm for the hinter. You should OR one of these values to your ‘load_flags’ when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p> +<p>Note that a font's native hinters may ignore the hinting algorithm you have specified (e.g., the TrueType bytecode interpreter). You can set <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_FORCE_AUTOHINT</a> to ensure that the auto-hinter is used.</p> <h4>values</h4> <table class="fields"> <tr><td class="val" id="FT_LOAD_TARGET_NORMAL">FT_LOAD_TARGET_NORMAL</td><td class="desc"> -<p>This corresponds to the default hinting algorithm, optimized for standard gray-level rendering. For monochrome output, use <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_MONO</a> instead.</p> +<p>The default hinting algorithm, optimized for standard gray-level rendering. For monochrome output, use <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_MONO</a> instead.</p> </td></tr> <tr><td class="val" id="FT_LOAD_TARGET_LIGHT">FT_LOAD_TARGET_LIGHT</td><td class="desc"> -<p>A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by Microsoft's ClearType and Adobe's proprietary font renderer. This preserves inter-glyph spacing in horizontal text. The snapping is done either by the native font driver if the driver itself and the font support it or by the auto-hinter.</p> +<p>A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by FreeType's new CFF engine or Microsoft's ClearType font renderer. This preserves inter-glyph spacing in horizontal text. The snapping is done either by the native font driver, if the driver itself and the font support it, or by the auto-hinter.</p> +<p>Advance widths are rounded to integer values; however, using the ‘lsb_delta’ and ‘rsb_delta’ fields of <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a>, it is possible to get fractional advance widths for subpixel positioning (which is recommended to use).</p> +<p>If configuration option AF_CONFIG_OPTION_TT_SIZE_METRICS is active, TrueType-like metrics are used to make this mode behave similarly as in unpatched FreeType versions between 2.4.6 and 2.7.1 (inclusive).</p> </td></tr> <tr><td class="val" id="FT_LOAD_TARGET_MONO">FT_LOAD_TARGET_MONO</td><td class="desc"> <p>Strong hinting algorithm that should only be used for monochrome output. The result is probably unpleasant if the glyph is rendered in non-monochrome modes.</p> </td></tr> <tr><td class="val" id="FT_LOAD_TARGET_LCD">FT_LOAD_TARGET_LCD</td><td class="desc"> -<p>A variant of <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_NORMAL</a> optimized for horizontally decimated LCD displays.</p> +<p>A variant of <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_LIGHT</a> optimized for horizontally decimated LCD displays.</p> </td></tr> <tr><td class="val" id="FT_LOAD_TARGET_LCD_V">FT_LOAD_TARGET_LCD_V</td><td class="desc"> <p>A variant of <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_NORMAL</a> optimized for vertically decimated LCD displays.</p> @@ -2933,6 +3121,7 @@ FT_Render_Glyph( face->glyph, FT_RENDER_MODE_LCD ); </pre> +<p>In general, you should stick with one rendering mode. For example, switching between <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_NORMAL</a> and <a href="ft2-base_interface.html#FT_LOAD_TARGET_XXX">FT_LOAD_TARGET_MONO</a> enforces a lot of recomputation for TrueType fonts, which is slow. Another reason is caching: Selecting a different mode usually causes changes in both the outlines and the rasterized bitmaps; it is thus necessary to empty the cache after a mode switch to avoid false hits.</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> @@ -2950,7 +3139,7 @@ #define <a href="ft2-base_interface.html#FT_SUBGLYPH_FLAG_USE_MY_METRICS">FT_SUBGLYPH_FLAG_USE_MY_METRICS</a> 0x200 </pre> -<p>A list of constants used to describe subglyphs. Please refer to the TrueType specification for the meaning of the various flags.</p> +<p>A list of constants describing subglyphs. Please refer to the ‘glyf’ table description in the OpenType specification for the meaning of the various flags (which get synthesized for non-OpenType subglyphs).</p> <h4>values</h4> <table class="fields"> @@ -2993,7 +3182,7 @@ </pre> <p>A list of bit flags used in the ‘fsType’ field of the OS/2 table in a TrueType or OpenType font and the ‘FSType’ entry in a PostScript font. These bit flags are returned by <a href="ft2-base_interface.html#FT_Get_FSType_Flags">FT_Get_FSType_Flags</a>; they inform client applications of embedding and subsetting restrictions associated with a font.</p> -<p>See <a href="http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf">http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf</a> for more details.</p> +<p>See <a href="https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf">https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/FontPolicies.pdf</a> for more details.</p> <h4>values</h4> <table class="fields"> @@ -3004,22 +3193,22 @@ <p>Fonts that have only this bit set must not be modified, embedded or exchanged in any manner without first obtaining permission of the font software copyright owner.</p> </td></tr> <tr><td class="val" id="FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING">FT_FSTYPE_PREVIEW_AND_PRINT_EMBEDDING</td><td class="desc"> -<p>If this bit is set, the font may be embedded and temporarily loaded on the remote system. Documents containing Preview & Print fonts must be opened ‘read-only’; no edits can be applied to the document.</p> +<p>The font may be embedded and temporarily loaded on the remote system. Documents containing Preview & Print fonts must be opened ‘read-only’; no edits can be applied to the document.</p> </td></tr> <tr><td class="val" id="FT_FSTYPE_EDITABLE_EMBEDDING">FT_FSTYPE_EDITABLE_EMBEDDING</td><td class="desc"> -<p>If this bit is set, the font may be embedded but must only be installed temporarily on other systems. In contrast to Preview & Print fonts, documents containing editable fonts may be opened for reading, editing is permitted, and changes may be saved.</p> +<p>The font may be embedded but must only be installed temporarily on other systems. In contrast to Preview & Print fonts, documents containing editable fonts may be opened for reading, editing is permitted, and changes may be saved.</p> </td></tr> <tr><td class="val" id="FT_FSTYPE_NO_SUBSETTING">FT_FSTYPE_NO_SUBSETTING</td><td class="desc"> -<p>If this bit is set, the font may not be subsetted prior to embedding.</p> +<p>The font may not be subsetted prior to embedding.</p> </td></tr> <tr><td class="val" id="FT_FSTYPE_BITMAP_EMBEDDING_ONLY">FT_FSTYPE_BITMAP_EMBEDDING_ONLY</td><td class="desc"> -<p>If this bit is set, only bitmaps contained in the font may be embedded; no outline data may be embedded. If there are no bitmaps available in the font, then the font is unembeddable.</p> +<p>Only bitmaps contained in the font may be embedded; no outline data may be embedded. If there are no bitmaps available in the font, then the font is unembeddable.</p> </td></tr> </table> <h4>note</h4> <p>The flags are ORed together, thus more than a single value can be returned.</p> -<p>While the fsType flags can indicate that a font may be embedded, a license with the font vendor may be separately required to use the font in this way.</p> +<p>While the ‘fsType’ flags can indicate that a font may be embedded, a license with the font vendor may be separately required to use the font in this way.</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> @@ -3036,18 +3225,5 @@ <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="FT_IS_NAMED_INSTANCE">FT_IS_NAMED_INSTANCE</h3> -<p>Defined in FT_FREETYPE_H (freetype/freetype.h).</p> -<pre> -#define <b>FT_IS_NAMED_INSTANCE</b>( face ) \ - ( (face)->face_index & 0x7FFF0000L ) -</pre> - -<p>A macro that returns true whenever a face object is a named instance of a GX variation font.</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> |