kc3-lang/freetype/src/base/ftobjs.h
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Hash : 37379e21
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Date : 2000-03-28T11:22:31
major changes to the library: - there is now a "convenience" API to manage glyphs in "include/ftglyph.h". See the demo program "ftstring" for an example.. - the raster interface has been changed in order to allow direct composition through user-provided callbacks. This has been tested but isn't demonstrated for now in "demos" - the FT_LOAD_NO_RECURSE flag is supported, as this is required by some new code in the auto-hinting engine - some bug fixed in FT_MulFix which made FT_xxx_Transform return incorrect results..
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src/base/ftobjs.h
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/***************************************************************************/ /* */ /* ftobjs.h */ /* */ /* The FreeType private base classes (specification). */ /* */ /* Copyright 1996-1999 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. */ /* */ /***************************************************************************/ /*************************************************************************/ /* */ /* This file contains the definition of all internal FreeType classes. */ /* */ /*************************************************************************/ #ifndef FTOBJS_H #define FTOBJS_H #include <ftconfig.h> #include <ftsystem.h> #include <ftdriver.h> /*************************************************************************/ /* */ /* Some generic definitions. */ /* */ #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #ifndef NULL #define NULL (void*)0 #endif #ifndef UNUSED #define UNUSED( arg ) ( (void)(arg) ) #endif /*************************************************************************/ /* */ /* The min and max functions missing in C. As usual, be careful not to */ /* write things like MIN( a++, b++ ) to avoid side effects. */ /* */ #ifndef MIN #define MIN( a, b ) ( (a) < (b) ? (a) : (b) ) #endif #ifndef MAX #define MAX( a, b ) ( (a) > (b) ? (a) : (b) ) #endif #ifndef ABS #define ABS( a ) ( (a) < 0 ? -(a) : (a) ) #endif /*************************************************************************/ /* */ /* <Macro> */ /* FT_SET_ERROR */ /* */ /* <Description> */ /* This macro is used to set an implicit `error' variable to a given */ /* expression's value (usually a function call), and convert it to a */ /* boolean which is set whenever the value is != 0. */ /* */ #undef FT_SET_ERROR #define FT_SET_ERROR( expression ) \ ( (error = (expression)) != 0 ) /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** M E M O R Y ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ BASE_DEF FT_Error FT_Alloc( FT_Memory memory, FT_Long size, void** P ); BASE_DEF FT_Error FT_Realloc( FT_Memory memory, FT_Long current, FT_Long size, void** P ); BASE_DEF void FT_Free( FT_Memory memory, void** P ); /* This include is needed by the MEM_xxx() macros, it should be */ /* available on every platform we know !! */ #include <string.h> #define MEM_Set( dest, byte, count ) memset( dest, byte, count ) #ifdef HAVE_MEMCPY #define MEM_Copy( dest, source, count ) memcpy( dest, source, count ) #else #define MEM_Copy( dest, source, count ) bcopy( source, dest, count ) #endif #define MEM_Move( dest, source, count ) memmove( dest, source, count ) /*************************************************************************/ /* */ /* We now support closures to produce completely reentrant code. This */ /* means the allocation functions now takes an additional argument */ /* (`memory'). It is a handle to a given memory object, responsible for */ /* all low-level operations, including memory management and */ /* synchronisation. */ /* */ /* In order to keep our code readable and use the same macros in the */ /* font drivers and the rest of the library, MEM_Alloc(), ALLOC(), and */ /* ALLOC_ARRAY() now use an implicit variable, `memory'. It must be */ /* defined at all locations where a memory operation is queried. */ /* */ /* */ /* Note that ALL memory allocation functions need an IMPLICIT argument */ /* called `memory' to point to the current memory object. */ /* */ #define MEM_Alloc( _pointer_, _size_ ) \ FT_Alloc( memory, _size_, (void**)&(_pointer_) ) #define MEM_Realloc( _pointer_, _current_, _size_ ) \ FT_Realloc( memory, _current_, _size_, (void**)&(_pointer_) ) #define ALLOC( _pointer_, _size_ ) \ FT_SET_ERROR( MEM_Alloc( _pointer_, _size_ ) ) #define REALLOC( _pointer_, _current_, _size_ ) \ FT_SET_ERROR( MEM_Realloc( _pointer_, _current_, _size_ ) ) #define ALLOC_ARRAY( _pointer_, _count_, _type_ ) \ FT_SET_ERROR( MEM_Alloc( _pointer_, (_count_)*sizeof (_type_) ) ) #define REALLOC_ARRAY( _pointer_, _current_, _count_, _type_ ) \ FT_SET_ERROR( MEM_Realloc( _pointer_, (_current_)*sizeof(_type_), \ (_count_)*sizeof(_type_) ) ) #define FREE( _pointer_ ) FT_Free( memory, (void**)&(_pointer_) ) EXPORT_DEF FT_Error FT_New_Size( FT_Face face, FT_Size* size ); EXPORT_DEF FT_Error FT_Done_Size( FT_Size size ); EXPORT_DEF FT_Error FT_New_GlyphSlot( FT_Face face, FT_GlyphSlot* aslot ); EXPORT_DEF void FT_Done_GlyphSlot( FT_GlyphSlot slot ); /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** D R I V E R S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* FT_DriverRec */ /* */ /* <Description> */ /* The root font driver class. A font driver is responsible for */ /* managing and loading font files of a given format. */ /* */ /* <Fields> */ /* library :: A handle to the driver's parent library. */ /* */ /* memory :: A handle to the driver's memory object. This is a */ /* duplicate of `library->memory'. */ /* */ /* interface :: A set of driver methods that implement its */ /* behaviour. These methods are called by the */ /* various FreeType functions like FT_New_Face(), */ /* FT_Load_Glyph(), etc. */ /* */ /* format :: A typeless pointer, used to store the address of */ /* the driver's format specific interface. This is a */ /* table of other driver methods that are specific to */ /* its format. Format specific interfaces are */ /* defined in the driver's header files (e.g., */ /* `freetype/drivers/ttlib/ttdriver.h'). */ /* */ /* version :: The driver's version. It can be used for */ /* versioning and dynamic driver update if needed. */ /* */ /* description :: An ASCII string describing the driver's supported */ /* format, like `truetype', `type1', etc. */ /* */ /* faces_list :: The list of faces currently opened by this driver. */ /* */ /* extensions :: a typeless pointer to the driver's extensions */ /* registry, when they are supported through the */ /* config macro FT_CONFIG_OPTION_EXTENSIONS */ /* */ typedef struct FT_DriverRec_ { FT_Library library; FT_Memory memory; FT_Generic generic; FT_DriverInterface interface; FT_FormatInterface format; FT_Int version; /* driver version */ FT_String* description; /* format description */ FT_ListRec faces_list; /* driver's faces list */ void* extensions; } FT_DriverRec; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** G L Y P H Z O N E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /************************************************************************ * * <Struct> * FT_GlyphZone * * <Description> * A glyph zone is used to load, scale and hint glyph outline * coordinates. * * <Fields> * memory :: handle to memory manager * max_points :: max size in points of zone * max_contours :: max size in contours of zone * n_points :: current number of points in zone * n_contours :: current number of contours in zone * org :: original glyph coordinates (font units/scaled) * cur :: current glyph coordinates (scaled/hinted) * tags :: point control tags * contours :: contour end points * ***********************************************************************/ typedef struct FT_GlyphZone_ { FT_Memory memory; FT_UShort max_points; FT_UShort max_contours; FT_UShort n_points; /* number of points in zone */ FT_Short n_contours; /* number of contours */ FT_Vector* org; /* original point coordinates */ FT_Vector* cur; /* current point coordinates */ FT_Byte* tags; /* current touch flags */ FT_UShort* contours; /* contour end points */ } FT_GlyphZone; BASE_DEF FT_Error FT_New_GlyphZone( FT_Memory memory, FT_UShort maxPoints, FT_Short maxContours, FT_GlyphZone* zone ); BASE_DEF void FT_Done_GlyphZone( FT_GlyphZone* zone ); BASE_DEF FT_Error FT_Update_GlyphZone( FT_GlyphZone* zone, FT_UShort num_points, FT_Short num_contours ); /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** L I B R A R I E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ #define FT_DEBUG_HOOK_TRUETYPE 0 #define FT_DEBUG_HOOK_TYPE1 1 /*************************************************************************/ /* */ /* <Struct> */ /* FT_LibraryRec */ /* */ /* <Description> */ /* The FreeType library class. This is the root of all FreeType */ /* data. Use FT_New_Library() to create a library object, and */ /* FT_Done_Library() to discard it and all child objects. */ /* */ /* <Fields> */ /* memory :: The library's memory object. Manages memory */ /* allocation */ /* */ /* generic :: Client data variable. Used to extend the */ /* Library class by higher levels and clients. */ /* */ /* num_drivers :: The number of drivers currently registered */ /* within this library. This is set to 0 for new */ /* libraries. New drivers are added through the */ /* FT_Add_Driver() API function. */ /* */ /* drivers :: A table used to store handles to the currently */ /* registered font drivers. Note that each driver */ /* contains a list of its opened faces. */ /* */ /* raster_pool :: The raster object's render pool. This can */ /* ideally be changed dynamically at run-time. */ /* */ typedef void (*FT_DebugHook_Func)( void* arg ); typedef struct FT_LibraryRec_ { FT_Memory memory; /* library's memory object */ FT_Generic generic; FT_Int num_drivers; FT_Driver drivers[ FT_MAX_DRIVERS ]; /* driver objects */ FT_Raster_Funcs raster_funcs[ FT_MAX_GLYPH_FORMATS ]; FT_Raster rasters [ FT_MAX_GLYPH_FORMATS ]; void* raster_pool; /* scan-line conversion render pool */ long raster_pool_size; /* size of render pool in bytes */ FT_DebugHook_Func debug_hooks[4]; } FT_LibraryRec; EXPORT_DEF FT_Error FT_New_Library( FT_Memory memory, FT_Library* library ); EXPORT_DEF FT_Error FT_Done_Library( FT_Library library ); EXPORT_DEF void FT_Set_Debug_Hook( FT_Library library, FT_UInt hook_index, FT_DebugHook_Func debug_hook ); EXPORT_DEF FT_Error FT_Add_Driver( FT_Library library, const FT_DriverInterface* driver_interface ); EXPORT_DEF FT_Error FT_Remove_Driver( FT_Driver driver ); EXPORT_DEF FT_Driver FT_Get_Driver( FT_Library library, char* driver_name ); #ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM extern FT_Error FT_New_Stream( const char* filepathname, FT_Stream astream ); extern FT_Memory FT_New_Memory( void ); #endif /* Define default raster's interface. The default raster is located in `src/base/ftraster.c' */ /* */ /* Client applications can register new rasters through the FT_Set_Raster API.. */ /* */ #ifndef FT_NO_DEFAULT_RASTER extern FT_Raster_Funcs ft_default_raster; #endif #endif /* FTOBJS_H */ /* END */