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Unified Diff: third_party/freetype2/src/include/freetype/tttables.h

Issue 1524973002: Update freetype sources (2.6.2) in third party. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 5 years ago
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Index: third_party/freetype2/src/include/freetype/tttables.h
diff --git a/third_party/freetype2/src/include/freetype/tttables.h b/third_party/freetype2/src/include/freetype/tttables.h
new file mode 100644
index 0000000000000000000000000000000000000000..1568f4036473e8815384d10fb0706b44069c42d7
--- /dev/null
+++ b/third_party/freetype2/src/include/freetype/tttables.h
@@ -0,0 +1,829 @@
+/***************************************************************************/
+/* */
+/* tttables.h */
+/* */
+/* Basic SFNT/TrueType tables definitions and interface */
+/* (specification only). */
+/* */
+/* Copyright 1996-2015 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+#ifndef __TTTABLES_H__
+#define __TTTABLES_H__
+
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+#ifdef FREETYPE_H
+#error "freetype.h of FreeType 1 has been loaded!"
+#error "Please fix the directory search order for header files"
+#error "so that freetype.h of FreeType 2 is found first."
+#endif
+
+
+FT_BEGIN_HEADER
+
+ /*************************************************************************/
+ /* */
+ /* <Section> */
+ /* truetype_tables */
+ /* */
+ /* <Title> */
+ /* TrueType Tables */
+ /* */
+ /* <Abstract> */
+ /* TrueType specific table types and functions. */
+ /* */
+ /* <Description> */
+ /* This section contains the definition of TrueType-specific tables */
+ /* as well as some routines used to access and process them. */
+ /* */
+ /* <Order> */
+ /* TT_Header */
+ /* TT_HoriHeader */
+ /* TT_VertHeader */
+ /* TT_OS2 */
+ /* TT_Postscript */
+ /* TT_PCLT */
+ /* TT_MaxProfile */
+ /* */
+ /* FT_Sfnt_Tag */
+ /* FT_Get_Sfnt_Table */
+ /* FT_Load_Sfnt_Table */
+ /* FT_Sfnt_Table_Info */
+ /* */
+ /* FT_Get_CMap_Language_ID */
+ /* FT_Get_CMap_Format */
+ /* */
+ /* FT_PARAM_TAG_UNPATENTED_HINTING */
+ /* */
+ /*************************************************************************/
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_Header */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType font header table. All */
+ /* fields follow the TrueType specification. */
+ /* */
+ typedef struct TT_Header_
+ {
+ FT_Fixed Table_Version;
+ FT_Fixed Font_Revision;
+
+ FT_Long CheckSum_Adjust;
+ FT_Long Magic_Number;
+
+ FT_UShort Flags;
+ FT_UShort Units_Per_EM;
+
+ FT_Long Created [2];
+ FT_Long Modified[2];
+
+ FT_Short xMin;
+ FT_Short yMin;
+ FT_Short xMax;
+ FT_Short yMax;
+
+ FT_UShort Mac_Style;
+ FT_UShort Lowest_Rec_PPEM;
+
+ FT_Short Font_Direction;
+ FT_Short Index_To_Loc_Format;
+ FT_Short Glyph_Data_Format;
+
+ } TT_Header;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_HoriHeader */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType horizontal header, the `hhea' */
+ /* table, as well as the corresponding horizontal metrics table, */
+ /* i.e., the `hmtx' table. */
+ /* */
+ /* <Fields> */
+ /* Version :: The table version. */
+ /* */
+ /* Ascender :: The font's ascender, i.e., the distance */
+ /* from the baseline to the top-most of all */
+ /* glyph points found in the font. */
+ /* */
+ /* This value is invalid in many fonts, as */
+ /* it is usually set by the font designer, */
+ /* and often reflects only a portion of the */
+ /* glyphs found in the font (maybe ASCII). */
+ /* */
+ /* You should use the `sTypoAscender' field */
+ /* of the OS/2 table instead if you want */
+ /* the correct one. */
+ /* */
+ /* Descender :: The font's descender, i.e., the distance */
+ /* from the baseline to the bottom-most of */
+ /* all glyph points found in the font. It */
+ /* is negative. */
+ /* */
+ /* This value is invalid in many fonts, as */
+ /* it is usually set by the font designer, */
+ /* and often reflects only a portion of the */
+ /* glyphs found in the font (maybe ASCII). */
+ /* */
+ /* You should use the `sTypoDescender' */
+ /* field of the OS/2 table instead if you */
+ /* want the correct one. */
+ /* */
+ /* Line_Gap :: The font's line gap, i.e., the distance */
+ /* to add to the ascender and descender to */
+ /* get the BTB, i.e., the */
+ /* baseline-to-baseline distance for the */
+ /* font. */
+ /* */
+ /* advance_Width_Max :: This field is the maximum of all advance */
+ /* widths found in the font. It can be */
+ /* used to compute the maximum width of an */
+ /* arbitrary string of text. */
+ /* */
+ /* min_Left_Side_Bearing :: The minimum left side bearing of all */
+ /* glyphs within the font. */
+ /* */
+ /* min_Right_Side_Bearing :: The minimum right side bearing of all */
+ /* glyphs within the font. */
+ /* */
+ /* xMax_Extent :: The maximum horizontal extent (i.e., the */
+ /* `width' of a glyph's bounding box) for */
+ /* all glyphs in the font. */
+ /* */
+ /* caret_Slope_Rise :: The rise coefficient of the cursor's */
+ /* slope of the cursor (slope=rise/run). */
+ /* */
+ /* caret_Slope_Run :: The run coefficient of the cursor's */
+ /* slope. */
+ /* */
+ /* Reserved :: 8~reserved bytes. */
+ /* */
+ /* metric_Data_Format :: Always~0. */
+ /* */
+ /* number_Of_HMetrics :: Number of HMetrics entries in the `hmtx' */
+ /* table -- this value can be smaller than */
+ /* the total number of glyphs in the font. */
+ /* */
+ /* long_metrics :: A pointer into the `hmtx' table. */
+ /* */
+ /* short_metrics :: A pointer into the `hmtx' table. */
+ /* */
+ /* <Note> */
+ /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */
+ /* be identical except for the names of their fields, */
+ /* which are different. */
+ /* */
+ /* This ensures that a single function in the `ttload' */
+ /* module is able to read both the horizontal and vertical */
+ /* headers. */
+ /* */
+ typedef struct TT_HoriHeader_
+ {
+ FT_Fixed Version;
+ FT_Short Ascender;
+ FT_Short Descender;
+ FT_Short Line_Gap;
+
+ FT_UShort advance_Width_Max; /* advance width maximum */
+
+ FT_Short min_Left_Side_Bearing; /* minimum left-sb */
+ FT_Short min_Right_Side_Bearing; /* minimum right-sb */
+ FT_Short xMax_Extent; /* xmax extents */
+ FT_Short caret_Slope_Rise;
+ FT_Short caret_Slope_Run;
+ FT_Short caret_Offset;
+
+ FT_Short Reserved[4];
+
+ FT_Short metric_Data_Format;
+ FT_UShort number_Of_HMetrics;
+
+ /* The following fields are not defined by the TrueType specification */
+ /* but they are used to connect the metrics header to the relevant */
+ /* `HMTX' table. */
+
+ void* long_metrics;
+ void* short_metrics;
+
+ } TT_HoriHeader;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_VertHeader */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType vertical header, the `vhea' */
+ /* table, as well as the corresponding vertical metrics table, i.e., */
+ /* the `vmtx' table. */
+ /* */
+ /* <Fields> */
+ /* Version :: The table version. */
+ /* */
+ /* Ascender :: The font's ascender, i.e., the distance */
+ /* from the baseline to the top-most of */
+ /* all glyph points found in the font. */
+ /* */
+ /* This value is invalid in many fonts, as */
+ /* it is usually set by the font designer, */
+ /* and often reflects only a portion of */
+ /* the glyphs found in the font (maybe */
+ /* ASCII). */
+ /* */
+ /* You should use the `sTypoAscender' */
+ /* field of the OS/2 table instead if you */
+ /* want the correct one. */
+ /* */
+ /* Descender :: The font's descender, i.e., the */
+ /* distance from the baseline to the */
+ /* bottom-most of all glyph points found */
+ /* in the font. It is negative. */
+ /* */
+ /* This value is invalid in many fonts, as */
+ /* it is usually set by the font designer, */
+ /* and often reflects only a portion of */
+ /* the glyphs found in the font (maybe */
+ /* ASCII). */
+ /* */
+ /* You should use the `sTypoDescender' */
+ /* field of the OS/2 table instead if you */
+ /* want the correct one. */
+ /* */
+ /* Line_Gap :: The font's line gap, i.e., the distance */
+ /* to add to the ascender and descender to */
+ /* get the BTB, i.e., the */
+ /* baseline-to-baseline distance for the */
+ /* font. */
+ /* */
+ /* advance_Height_Max :: This field is the maximum of all */
+ /* advance heights found in the font. It */
+ /* can be used to compute the maximum */
+ /* height of an arbitrary string of text. */
+ /* */
+ /* min_Top_Side_Bearing :: The minimum top side bearing of all */
+ /* glyphs within the font. */
+ /* */
+ /* min_Bottom_Side_Bearing :: The minimum bottom side bearing of all */
+ /* glyphs within the font. */
+ /* */
+ /* yMax_Extent :: The maximum vertical extent (i.e., the */
+ /* `height' of a glyph's bounding box) for */
+ /* all glyphs in the font. */
+ /* */
+ /* caret_Slope_Rise :: The rise coefficient of the cursor's */
+ /* slope of the cursor (slope=rise/run). */
+ /* */
+ /* caret_Slope_Run :: The run coefficient of the cursor's */
+ /* slope. */
+ /* */
+ /* caret_Offset :: The cursor's offset for slanted fonts. */
+ /* This value is `reserved' in vmtx */
+ /* version 1.0. */
+ /* */
+ /* Reserved :: 8~reserved bytes. */
+ /* */
+ /* metric_Data_Format :: Always~0. */
+ /* */
+ /* number_Of_HMetrics :: Number of VMetrics entries in the */
+ /* `vmtx' table -- this value can be */
+ /* smaller than the total number of glyphs */
+ /* in the font. */
+ /* */
+ /* long_metrics :: A pointer into the `vmtx' table. */
+ /* */
+ /* short_metrics :: A pointer into the `vmtx' table. */
+ /* */
+ /* <Note> */
+ /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */
+ /* be identical except for the names of their fields, */
+ /* which are different. */
+ /* */
+ /* This ensures that a single function in the `ttload' */
+ /* module is able to read both the horizontal and vertical */
+ /* headers. */
+ /* */
+ typedef struct TT_VertHeader_
+ {
+ FT_Fixed Version;
+ FT_Short Ascender;
+ FT_Short Descender;
+ FT_Short Line_Gap;
+
+ FT_UShort advance_Height_Max; /* advance height maximum */
+
+ FT_Short min_Top_Side_Bearing; /* minimum left-sb or top-sb */
+ FT_Short min_Bottom_Side_Bearing; /* minimum right-sb or bottom-sb */
+ FT_Short yMax_Extent; /* xmax or ymax extents */
+ FT_Short caret_Slope_Rise;
+ FT_Short caret_Slope_Run;
+ FT_Short caret_Offset;
+
+ FT_Short Reserved[4];
+
+ FT_Short metric_Data_Format;
+ FT_UShort number_Of_VMetrics;
+
+ /* The following fields are not defined by the TrueType specification */
+ /* but they're used to connect the metrics header to the relevant */
+ /* `HMTX' or `VMTX' table. */
+
+ void* long_metrics;
+ void* short_metrics;
+
+ } TT_VertHeader;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_OS2 */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType OS/2 table. All fields */
+ /* comply to the OpenType specification. */
+ /* */
+ /* Note that we now support old Mac fonts that do not include an OS/2 */
+ /* table. In this case, the `version' field is always set to 0xFFFF. */
+ /* */
+ typedef struct TT_OS2_
+ {
+ FT_UShort version; /* 0x0001 - more or 0xFFFF */
+ FT_Short xAvgCharWidth;
+ FT_UShort usWeightClass;
+ FT_UShort usWidthClass;
+ FT_UShort fsType;
+ FT_Short ySubscriptXSize;
+ FT_Short ySubscriptYSize;
+ FT_Short ySubscriptXOffset;
+ FT_Short ySubscriptYOffset;
+ FT_Short ySuperscriptXSize;
+ FT_Short ySuperscriptYSize;
+ FT_Short ySuperscriptXOffset;
+ FT_Short ySuperscriptYOffset;
+ FT_Short yStrikeoutSize;
+ FT_Short yStrikeoutPosition;
+ FT_Short sFamilyClass;
+
+ FT_Byte panose[10];
+
+ FT_ULong ulUnicodeRange1; /* Bits 0-31 */
+ FT_ULong ulUnicodeRange2; /* Bits 32-63 */
+ FT_ULong ulUnicodeRange3; /* Bits 64-95 */
+ FT_ULong ulUnicodeRange4; /* Bits 96-127 */
+
+ FT_Char achVendID[4];
+
+ FT_UShort fsSelection;
+ FT_UShort usFirstCharIndex;
+ FT_UShort usLastCharIndex;
+ FT_Short sTypoAscender;
+ FT_Short sTypoDescender;
+ FT_Short sTypoLineGap;
+ FT_UShort usWinAscent;
+ FT_UShort usWinDescent;
+
+ /* only version 1 and higher: */
+
+ FT_ULong ulCodePageRange1; /* Bits 0-31 */
+ FT_ULong ulCodePageRange2; /* Bits 32-63 */
+
+ /* only version 2 and higher: */
+
+ FT_Short sxHeight;
+ FT_Short sCapHeight;
+ FT_UShort usDefaultChar;
+ FT_UShort usBreakChar;
+ FT_UShort usMaxContext;
+
+ /* only version 5 and higher: */
+
+ FT_UShort usLowerOpticalPointSize; /* in twips (1/20th points) */
+ FT_UShort usUpperOpticalPointSize; /* in twips (1/20th points) */
+
+ } TT_OS2;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_Postscript */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType PostScript table. All fields */
+ /* comply to the TrueType specification. This structure does not */
+ /* reference the PostScript glyph names, which can be nevertheless */
+ /* accessed with the `ttpost' module. */
+ /* */
+ typedef struct TT_Postscript_
+ {
+ FT_Fixed FormatType;
+ FT_Fixed italicAngle;
+ FT_Short underlinePosition;
+ FT_Short underlineThickness;
+ FT_ULong isFixedPitch;
+ FT_ULong minMemType42;
+ FT_ULong maxMemType42;
+ FT_ULong minMemType1;
+ FT_ULong maxMemType1;
+
+ /* Glyph names follow in the file, but we don't */
+ /* load them by default. See the ttpost.c file. */
+
+ } TT_Postscript;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_PCLT */
+ /* */
+ /* <Description> */
+ /* A structure used to model a TrueType PCLT table. All fields */
+ /* comply to the TrueType specification. */
+ /* */
+ typedef struct TT_PCLT_
+ {
+ FT_Fixed Version;
+ FT_ULong FontNumber;
+ FT_UShort Pitch;
+ FT_UShort xHeight;
+ FT_UShort Style;
+ FT_UShort TypeFamily;
+ FT_UShort CapHeight;
+ FT_UShort SymbolSet;
+ FT_Char TypeFace[16];
+ FT_Char CharacterComplement[8];
+ FT_Char FileName[6];
+ FT_Char StrokeWeight;
+ FT_Char WidthType;
+ FT_Byte SerifStyle;
+ FT_Byte Reserved;
+
+ } TT_PCLT;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Struct> */
+ /* TT_MaxProfile */
+ /* */
+ /* <Description> */
+ /* The maximum profile is a table containing many max values, which */
+ /* can be used to pre-allocate arrays. This ensures that no memory */
+ /* allocation occurs during a glyph load. */
+ /* */
+ /* <Fields> */
+ /* version :: The version number. */
+ /* */
+ /* numGlyphs :: The number of glyphs in this TrueType */
+ /* font. */
+ /* */
+ /* maxPoints :: The maximum number of points in a */
+ /* non-composite TrueType glyph. See also */
+ /* the structure element */
+ /* `maxCompositePoints'. */
+ /* */
+ /* maxContours :: The maximum number of contours in a */
+ /* non-composite TrueType glyph. See also */
+ /* the structure element */
+ /* `maxCompositeContours'. */
+ /* */
+ /* maxCompositePoints :: The maximum number of points in a */
+ /* composite TrueType glyph. See also the */
+ /* structure element `maxPoints'. */
+ /* */
+ /* maxCompositeContours :: The maximum number of contours in a */
+ /* composite TrueType glyph. See also the */
+ /* structure element `maxContours'. */
+ /* */
+ /* maxZones :: The maximum number of zones used for */
+ /* glyph hinting. */
+ /* */
+ /* maxTwilightPoints :: The maximum number of points in the */
+ /* twilight zone used for glyph hinting. */
+ /* */
+ /* maxStorage :: The maximum number of elements in the */
+ /* storage area used for glyph hinting. */
+ /* */
+ /* maxFunctionDefs :: The maximum number of function */
+ /* definitions in the TrueType bytecode for */
+ /* this font. */
+ /* */
+ /* maxInstructionDefs :: The maximum number of instruction */
+ /* definitions in the TrueType bytecode for */
+ /* this font. */
+ /* */
+ /* maxStackElements :: The maximum number of stack elements used */
+ /* during bytecode interpretation. */
+ /* */
+ /* maxSizeOfInstructions :: The maximum number of TrueType opcodes */
+ /* used for glyph hinting. */
+ /* */
+ /* maxComponentElements :: The maximum number of simple (i.e., non- */
+ /* composite) glyphs in a composite glyph. */
+ /* */
+ /* maxComponentDepth :: The maximum nesting depth of composite */
+ /* glyphs. */
+ /* */
+ /* <Note> */
+ /* This structure is only used during font loading. */
+ /* */
+ typedef struct TT_MaxProfile_
+ {
+ FT_Fixed version;
+ FT_UShort numGlyphs;
+ FT_UShort maxPoints;
+ FT_UShort maxContours;
+ FT_UShort maxCompositePoints;
+ FT_UShort maxCompositeContours;
+ FT_UShort maxZones;
+ FT_UShort maxTwilightPoints;
+ FT_UShort maxStorage;
+ FT_UShort maxFunctionDefs;
+ FT_UShort maxInstructionDefs;
+ FT_UShort maxStackElements;
+ FT_UShort maxSizeOfInstructions;
+ FT_UShort maxComponentElements;
+ FT_UShort maxComponentDepth;
+
+ } TT_MaxProfile;
+
+
+ /*************************************************************************/
+ /* */
+ /* <Enum> */
+ /* FT_Sfnt_Tag */
+ /* */
+ /* <Description> */
+ /* An enumeration used to specify the index of an SFNT table. */
+ /* Used in the @FT_Get_Sfnt_Table API function. */
+ /* */
+ /* <Values> */
+ /* FT_SFNT_HEAD :: To access the font's @TT_Header structure. */
+ /* */
+ /* FT_SFNT_MAXP :: To access the font's @TT_MaxProfile structure. */
+ /* */
+ /* FT_SFNT_OS2 :: To access the font's @TT_OS2 structure. */
+ /* */
+ /* FT_SFNT_HHEA :: To access the font's @TT_HoriHeader structure. */
+ /* */
+ /* FT_SFNT_VHEA :: To access the font's @TT_VertHeader struture. */
+ /* */
+ /* FT_SFNT_POST :: To access the font's @TT_Postscript structure. */
+ /* */
+ /* FT_SFNT_PCLT :: To access the font's @TT_PCLT structure. */
+ /* */
+ typedef enum FT_Sfnt_Tag_
+ {
+ FT_SFNT_HEAD,
+ FT_SFNT_MAXP,
+ FT_SFNT_OS2,
+ FT_SFNT_HHEA,
+ FT_SFNT_VHEA,
+ FT_SFNT_POST,
+ FT_SFNT_PCLT,
+
+ FT_SFNT_MAX
+
+ } FT_Sfnt_Tag;
+
+ /* these constants are deprecated; use the corresponding `FT_Sfnt_Tag' */
+ /* values instead */
+#define ft_sfnt_head FT_SFNT_HEAD
+#define ft_sfnt_maxp FT_SFNT_MAXP
+#define ft_sfnt_os2 FT_SFNT_OS2
+#define ft_sfnt_hhea FT_SFNT_HHEA
+#define ft_sfnt_vhea FT_SFNT_VHEA
+#define ft_sfnt_post FT_SFNT_POST
+#define ft_sfnt_pclt FT_SFNT_PCLT
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* FT_Get_Sfnt_Table */
+ /* */
+ /* <Description> */
+ /* Return a pointer to a given SFNT table within a face. */
+ /* */
+ /* <Input> */
+ /* face :: A handle to the source. */
+ /* */
+ /* tag :: The index of the SFNT table. */
+ /* */
+ /* <Return> */
+ /* A type-less pointer to the table. This will be~0 in case of */
+ /* error, or if the corresponding table was not found *OR* loaded */
+ /* from the file. */
+ /* */
+ /* Use a typecast according to `tag' to access the structure */
+ /* elements. */
+ /* */
+ /* <Note> */
+ /* The table is owned by the face object and disappears with it. */
+ /* */
+ /* This function is only useful to access SFNT tables that are loaded */
+ /* by the sfnt, truetype, and opentype drivers. See @FT_Sfnt_Tag for */
+ /* a list. */
+ /* */
+ /* Here an example how to access the `vhea' table: */
+ /* */
+ /* { */
+ /* TT_VertHeader* vert_header; */
+ /* */
+ /* */
+ /* vert_header = */
+ /* (TT_VertHeader*)FT_Get_Sfnt_Table( face, FT_SFNT_VHEA ); */
+ /* } */
+ /* */
+ FT_EXPORT( void* )
+ FT_Get_Sfnt_Table( FT_Face face,
+ FT_Sfnt_Tag tag );
+
+
+ /**************************************************************************
+ *
+ * @function:
+ * FT_Load_Sfnt_Table
+ *
+ * @description:
+ * Load any font table into client memory.
+ *
+ * @input:
+ * face ::
+ * A handle to the source face.
+ *
+ * tag ::
+ * The four-byte tag of the table to load. Use the value~0 if you want
+ * to access the whole font file. Otherwise, you can use one of the
+ * definitions found in the @FT_TRUETYPE_TAGS_H file, or forge a new
+ * one with @FT_MAKE_TAG.
+ *
+ * offset ::
+ * The starting offset in the table (or file if tag == 0).
+ *
+ * @output:
+ * buffer ::
+ * The target buffer address. The client must ensure that the memory
+ * array is big enough to hold the data.
+ *
+ * @inout:
+ * length ::
+ * If the `length' parameter is NULL, then try to load the whole table.
+ * Return an error code if it fails.
+ *
+ * Else, if `*length' is~0, exit immediately while returning the
+ * table's (or file) full size in it.
+ *
+ * Else the number of bytes to read from the table or file, from the
+ * starting offset.
+ *
+ * @return:
+ * FreeType error code. 0~means success.
+ *
+ * @note:
+ * If you need to determine the table's length you should first call this
+ * function with `*length' set to~0, as in the following example:
+ *
+ * {
+ * FT_ULong length = 0;
+ *
+ *
+ * error = FT_Load_Sfnt_Table( face, tag, 0, NULL, &length );
+ * if ( error ) { ... table does not exist ... }
+ *
+ * buffer = malloc( length );
+ * if ( buffer == NULL ) { ... not enough memory ... }
+ *
+ * error = FT_Load_Sfnt_Table( face, tag, 0, buffer, &length );
+ * if ( error ) { ... could not load table ... }
+ * }
+ *
+ * Note that structures like @TT_Header or @TT_OS2 can't be used with
+ * this function; they are limited to @FT_Get_Sfnt_Table. Reason is that
+ * those structures depend on the processor architecture, with varying
+ * size (e.g. 32bit vs. 64bit) or order (big endian vs. little endian).
+ *
+ */
+ FT_EXPORT( FT_Error )
+ FT_Load_Sfnt_Table( FT_Face face,
+ FT_ULong tag,
+ FT_Long offset,
+ FT_Byte* buffer,
+ FT_ULong* length );
+
+
+ /**************************************************************************
+ *
+ * @function:
+ * FT_Sfnt_Table_Info
+ *
+ * @description:
+ * Return information on an SFNT table.
+ *
+ * @input:
+ * face ::
+ * A handle to the source face.
+ *
+ * table_index ::
+ * The index of an SFNT table. The function returns
+ * FT_Err_Table_Missing for an invalid value.
+ *
+ * @inout:
+ * tag ::
+ * The name tag of the SFNT table. If the value is NULL, `table_index'
+ * is ignored, and `length' returns the number of SFNT tables in the
+ * font.
+ *
+ * @output:
+ * length ::
+ * The length of the SFNT table (or the number of SFNT tables, depending
+ * on `tag').
+ *
+ * @return:
+ * FreeType error code. 0~means success.
+ *
+ * @note:
+ * While parsing fonts, FreeType handles SFNT tables with length zero as
+ * missing.
+ *
+ */
+ FT_EXPORT( FT_Error )
+ FT_Sfnt_Table_Info( FT_Face face,
+ FT_UInt table_index,
+ FT_ULong *tag,
+ FT_ULong *length );
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* FT_Get_CMap_Language_ID */
+ /* */
+ /* <Description> */
+ /* Return TrueType/sfnt specific cmap language ID. Definitions of */
+ /* language ID values are in `ttnameid.h'. */
+ /* */
+ /* <Input> */
+ /* charmap :: */
+ /* The target charmap. */
+ /* */
+ /* <Return> */
+ /* The language ID of `charmap'. If `charmap' doesn't belong to a */
+ /* TrueType/sfnt face, just return~0 as the default value. */
+ /* */
+ /* For a format~14 cmap (to access Unicode IVS), the return value is */
+ /* 0xFFFFFFFF. */
+ /* */
+ FT_EXPORT( FT_ULong )
+ FT_Get_CMap_Language_ID( FT_CharMap charmap );
+
+
+ /*************************************************************************/
+ /* */
+ /* <Function> */
+ /* FT_Get_CMap_Format */
+ /* */
+ /* <Description> */
+ /* Return TrueType/sfnt specific cmap format. */
+ /* */
+ /* <Input> */
+ /* charmap :: */
+ /* The target charmap. */
+ /* */
+ /* <Return> */
+ /* The format of `charmap'. If `charmap' doesn't belong to a */
+ /* TrueType/sfnt face, return -1. */
+ /* */
+ FT_EXPORT( FT_Long )
+ FT_Get_CMap_Format( FT_CharMap charmap );
+
+ /* */
+
+
+FT_END_HEADER
+
+#endif /* __TTTABLES_H__ */
+
+
+/* END */
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