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fttypes.h
/***************************************************************************/ /* */ /* fttypes.h */ /* */ /* FreeType simple types definitions (specification only). */ /* */ /* Copyright 1996-2018 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 FTTYPES_H_ #define FTTYPES_H_ #include <ft2build.h> #include FT_CONFIG_CONFIG_H #include FT_SYSTEM_H #include FT_IMAGE_H #include <stddef.h> FT_BEGIN_HEADER /*************************************************************************/ /* */ /* <Section> */ /* basic_types */ /* */ /* <Title> */ /* Basic Data Types */ /* */ /* <Abstract> */ /* The basic data types defined by the library. */ /* */ /* <Description> */ /* This section contains the basic data types defined by FreeType~2, */ /* ranging from simple scalar types to bitmap descriptors. More */ /* font-specific structures are defined in a different section. */ /* */ /* <Order> */ /* FT_Byte */ /* FT_Bytes */ /* FT_Char */ /* FT_Int */ /* FT_UInt */ /* FT_Int16 */ /* FT_UInt16 */ /* FT_Int32 */ /* FT_UInt32 */ /* FT_Int64 */ /* FT_UInt64 */ /* FT_Short */ /* FT_UShort */ /* FT_Long */ /* FT_ULong */ /* FT_Bool */ /* FT_Offset */ /* FT_PtrDist */ /* FT_String */ /* FT_Tag */ /* FT_Error */ /* FT_Fixed */ /* FT_Pointer */ /* FT_Pos */ /* FT_Vector */ /* FT_BBox */ /* FT_Matrix */ /* FT_FWord */ /* FT_UFWord */ /* FT_F2Dot14 */ /* FT_UnitVector */ /* FT_F26Dot6 */ /* FT_Data */ /* */ /* FT_MAKE_TAG */ /* */ /* FT_Generic */ /* FT_Generic_Finalizer */ /* */ /* FT_Bitmap */ /* FT_Pixel_Mode */ /* FT_Palette_Mode */ /* FT_Glyph_Format */ /* FT_IMAGE_TAG */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Type> */ /* FT_Bool */ /* */ /* <Description> */ /* A typedef of unsigned char, used for simple booleans. As usual, */ /* values 1 and~0 represent true and false, respectively. */ /* */ typedef unsigned char FT_Bool; /*************************************************************************/ /* */ /* <Type> */ /* FT_FWord */ /* */ /* <Description> */ /* A signed 16-bit integer used to store a distance in original font */ /* units. */ /* */ typedef signed short FT_FWord; /* distance in FUnits */ /*************************************************************************/ /* */ /* <Type> */ /* FT_UFWord */ /* */ /* <Description> */ /* An unsigned 16-bit integer used to store a distance in original */ /* font units. */ /* */ typedef unsigned short FT_UFWord; /* unsigned distance */ /*************************************************************************/ /* */ /* <Type> */ /* FT_Char */ /* */ /* <Description> */ /* A simple typedef for the _signed_ char type. */ /* */ typedef signed char FT_Char; /*************************************************************************/ /* */ /* <Type> */ /* FT_Byte */ /* */ /* <Description> */ /* A simple typedef for the _unsigned_ char type. */ /* */ typedef unsigned char FT_Byte; /*************************************************************************/ /* */ /* <Type> */ /* FT_Bytes */ /* */ /* <Description> */ /* A typedef for constant memory areas. */ /* */ typedef const FT_Byte* FT_Bytes; /*************************************************************************/ /* */ /* <Type> */ /* FT_Tag */ /* */ /* <Description> */ /* A typedef for 32-bit tags (as used in the SFNT format). */ /* */ typedef FT_UInt32 FT_Tag; /*************************************************************************/ /* */ /* <Type> */ /* FT_String */ /* */ /* <Description> */ /* A simple typedef for the char type, usually used for strings. */ /* */ typedef char FT_String; /*************************************************************************/ /* */ /* <Type> */ /* FT_Short */ /* */ /* <Description> */ /* A typedef for signed short. */ /* */ typedef signed short FT_Short; /*************************************************************************/ /* */ /* <Type> */ /* FT_UShort */ /* */ /* <Description> */ /* A typedef for unsigned short. */ /* */ typedef unsigned short FT_UShort; /*************************************************************************/ /* */ /* <Type> */ /* FT_Int */ /* */ /* <Description> */ /* A typedef for the int type. */ /* */ typedef signed int FT_Int; /*************************************************************************/ /* */ /* <Type> */ /* FT_UInt */ /* */ /* <Description> */ /* A typedef for the unsigned int type. */ /* */ typedef unsigned int FT_UInt; /*************************************************************************/ /* */ /* <Type> */ /* FT_Long */ /* */ /* <Description> */ /* A typedef for signed long. */ /* */ typedef signed long FT_Long; /*************************************************************************/ /* */ /* <Type> */ /* FT_ULong */ /* */ /* <Description> */ /* A typedef for unsigned long. */ /* */ typedef unsigned long FT_ULong; /*************************************************************************/ /* */ /* <Type> */ /* FT_F2Dot14 */ /* */ /* <Description> */ /* A signed 2.14 fixed-point type used for unit vectors. */ /* */ typedef signed short FT_F2Dot14; /*************************************************************************/ /* */ /* <Type> */ /* FT_F26Dot6 */ /* */ /* <Description> */ /* A signed 26.6 fixed-point type used for vectorial pixel */ /* coordinates. */ /* */ typedef signed long FT_F26Dot6; /*************************************************************************/ /* */ /* <Type> */ /* FT_Fixed */ /* */ /* <Description> */ /* This type is used to store 16.16 fixed-point values, like scaling */ /* values or matrix coefficients. */ /* */ typedef signed long FT_Fixed; /*************************************************************************/ /* */ /* <Type> */ /* FT_Error */ /* */ /* <Description> */ /* The FreeType error code type. A value of~0 is always interpreted */ /* as a successful operation. */ /* */ typedef int FT_Error; /*************************************************************************/ /* */ /* <Type> */ /* FT_Pointer */ /* */ /* <Description> */ /* A simple typedef for a typeless pointer. */ /* */ typedef void* FT_Pointer; /*************************************************************************/ /* */ /* <Type> */ /* FT_Offset */ /* */ /* <Description> */ /* This is equivalent to the ANSI~C `size_t' type, i.e., the largest */ /* _unsigned_ integer type used to express a file size or position, */ /* or a memory block size. */ /* */ typedef size_t FT_Offset; /*************************************************************************/ /* */ /* <Type> */ /* FT_PtrDist */ /* */ /* <Description> */ /* This is equivalent to the ANSI~C `ptrdiff_t' type, i.e., the */ /* largest _signed_ integer type used to express the distance */ /* between two pointers. */ /* */ typedef ft_ptrdiff_t FT_PtrDist; /*************************************************************************/ /* */ /* <Struct> */ /* FT_UnitVector */ /* */ /* <Description> */ /* A simple structure used to store a 2D vector unit vector. Uses */ /* FT_F2Dot14 types. */ /* */ /* <Fields> */ /* x :: Horizontal coordinate. */ /* */ /* y :: Vertical coordinate. */ /* */ typedef struct FT_UnitVector_ { FT_F2Dot14 x; FT_F2Dot14 y; } FT_UnitVector; /*************************************************************************/ /* */ /* <Struct> */ /* FT_Matrix */ /* */ /* <Description> */ /* A simple structure used to store a 2x2 matrix. Coefficients are */ /* in 16.16 fixed-point format. The computation performed is: */ /* */ /* { */ /* x' = x*xx + y*xy */ /* y' = x*yx + y*yy */ /* } */ /* */ /* <Fields> */ /* xx :: Matrix coefficient. */ /* */ /* xy :: Matrix coefficient. */ /* */ /* yx :: Matrix coefficient. */ /* */ /* yy :: Matrix coefficient. */ /* */ typedef struct FT_Matrix_ { FT_Fixed xx, xy; FT_Fixed yx, yy; } FT_Matrix; /*************************************************************************/ /* */ /* <Struct> */ /* FT_Data */ /* */ /* <Description> */ /* Read-only binary data represented as a pointer and a length. */ /* */ /* <Fields> */ /* pointer :: The data. */ /* */ /* length :: The length of the data in bytes. */ /* */ typedef struct FT_Data_ { const FT_Byte* pointer; FT_Int length; } FT_Data; /*************************************************************************/ /* */ /* <FuncType> */ /* FT_Generic_Finalizer */ /* */ /* <Description> */ /* Describe a function used to destroy the `client' data of any */ /* FreeType object. See the description of the @FT_Generic type for */ /* details of usage. */ /* */ /* <Input> */ /* The address of the FreeType object that is under finalization. */ /* Its client data is accessed through its `generic' field. */ /* */ typedef void (*FT_Generic_Finalizer)( void* object ); /*************************************************************************/ /* */ /* <Struct> */ /* FT_Generic */ /* */ /* <Description> */ /* Client applications often need to associate their own data to a */ /* variety of FreeType core objects. For example, a text layout API */ /* might want to associate a glyph cache to a given size object. */ /* */ /* Some FreeType object contains a `generic' field, of type */ /* FT_Generic, which usage is left to client applications and font */ /* servers. */ /* */ /* It can be used to store a pointer to client-specific data, as well */ /* as the address of a `finalizer' function, which will be called by */ /* FreeType when the object is destroyed (for example, the previous */ /* client example would put the address of the glyph cache destructor */ /* in the `finalizer' field). */ /* */ /* <Fields> */ /* data :: A typeless pointer to any client-specified data. This */ /* field is completely ignored by the FreeType library. */ /* */ /* finalizer :: A pointer to a `generic finalizer' function, which */ /* will be called when the object is destroyed. If this */ /* field is set to NULL, no code will be called. */ /* */ typedef struct FT_Generic_ { void* data; FT_Generic_Finalizer finalizer; } FT_Generic; /*************************************************************************/ /* */ /* <Macro> */ /* FT_MAKE_TAG */ /* */ /* <Description> */ /* This macro converts four-letter tags that are used to label */ /* TrueType tables into an unsigned long, to be used within FreeType. */ /* */ /* <Note> */ /* The produced values *must* be 32-bit integers. Don't redefine */ /* this macro. */ /* */ #define FT_MAKE_TAG( _x1, _x2, _x3, _x4 ) \ (FT_Tag) \ ( ( (FT_ULong)_x1 << 24 ) | \ ( (FT_ULong)_x2 << 16 ) | \ ( (FT_ULong)_x3 << 8 ) | \ (FT_ULong)_x4 ) /*************************************************************************/ /*************************************************************************/ /* */ /* L I S T M A N A G E M E N T */ /* */ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Section> */ /* list_processing */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Type> */ /* FT_ListNode */ /* */ /* <Description> */ /* Many elements and objects in FreeType are listed through an */ /* @FT_List record (see @FT_ListRec). As its name suggests, an */ /* FT_ListNode is a handle to a single list element. */ /* */ typedef struct FT_ListNodeRec_* FT_ListNode; /*************************************************************************/ /* */ /* <Type> */ /* FT_List */ /* */ /* <Description> */ /* A handle to a list record (see @FT_ListRec). */ /* */ typedef struct FT_ListRec_* FT_List; /*************************************************************************/ /* */ /* <Struct> */ /* FT_ListNodeRec */ /* */ /* <Description> */ /* A structure used to hold a single list element. */ /* */ /* <Fields> */ /* prev :: The previous element in the list. NULL if first. */ /* */ /* next :: The next element in the list. NULL if last. */ /* */ /* data :: A typeless pointer to the listed object. */ /* */ typedef struct FT_ListNodeRec_ { FT_ListNode prev; FT_ListNode next; void* data; } FT_ListNodeRec; /*************************************************************************/ /* */ /* <Struct> */ /* FT_ListRec */ /* */ /* <Description> */ /* A structure used to hold a simple doubly-linked list. These are */ /* used in many parts of FreeType. */ /* */ /* <Fields> */ /* head :: The head (first element) of doubly-linked list. */ /* */ /* tail :: The tail (last element) of doubly-linked list. */ /* */ typedef struct FT_ListRec_ { FT_ListNode head; FT_ListNode tail; } FT_ListRec; /* */ #define FT_IS_EMPTY( list ) ( (list).head == 0 ) #define FT_BOOL( x ) ( (FT_Bool)( x ) ) /* concatenate C tokens */ #define FT_ERR_XCAT( x, y ) x ## y #define FT_ERR_CAT( x, y ) FT_ERR_XCAT( x, y ) /* see `ftmoderr.h' for descriptions of the following macros */ #define FT_ERR( e ) FT_ERR_CAT( FT_ERR_PREFIX, e ) #define FT_ERROR_BASE( x ) ( (x) & 0xFF ) #define FT_ERROR_MODULE( x ) ( (x) & 0xFF00U ) #define FT_ERR_EQ( x, e ) \ ( FT_ERROR_BASE( x ) == FT_ERROR_BASE( FT_ERR( e ) ) ) #define FT_ERR_NEQ( x, e ) \ ( FT_ERROR_BASE( x ) != FT_ERROR_BASE( FT_ERR( e ) ) ) FT_END_HEADER #endif /* FTTYPES_H_ */ /* END */
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