/**************************************************************************** * * ftobjs.h * * The FreeType private base classes (specification). * * Copyright (C) 1996-2019 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 #include FT_RENDER_H #include FT_SIZES_H #include FT_LCD_FILTER_H #include FT_INTERNAL_MEMORY_H #include FT_INTERNAL_GLYPH_LOADER_H #include FT_INTERNAL_DRIVER_H #include FT_INTERNAL_AUTOHINT_H #include FT_INTERNAL_SERVICE_H #include FT_INTERNAL_CALC_H #ifdef FT_CONFIG_OPTION_INCREMENTAL #include FT_INCREMENTAL_H #endif FT_BEGIN_HEADER /************************************************************************** * * Some generic definitions. */ #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #ifndef NULL #define NULL (void*)0 #endif /************************************************************************** * * The min and max functions missing in C. As usual, be careful not to * write things like FT_MIN( a++, b++ ) to avoid side effects. */ #define FT_MIN( a, b ) ( (a) < (b) ? (a) : (b) ) #define FT_MAX( a, b ) ( (a) > (b) ? (a) : (b) ) #define FT_ABS( a ) ( (a) < 0 ? -(a) : (a) ) /* * Approximate sqrt(x*x+y*y) using the `alpha max plus beta min' algorithm. * We use alpha = 1, beta = 3/8, giving us results with a largest error * less than 7% compared to the exact value. */ #define FT_HYPOT( x, y ) \ ( x = FT_ABS( x ), \ y = FT_ABS( y ), \ x > y ? x + ( 3 * y >> 3 ) \ : y + ( 3 * x >> 3 ) ) /* we use FT_TYPEOF to suppress signedness compilation warnings */ #define FT_PAD_FLOOR( x, n ) ( (x) & ~FT_TYPEOF( x )( (n) - 1 ) ) #define FT_PAD_ROUND( x, n ) FT_PAD_FLOOR( (x) + (n) / 2, n ) #define FT_PAD_CEIL( x, n ) FT_PAD_FLOOR( (x) + (n) - 1, n ) #define FT_PIX_FLOOR( x ) ( (x) & ~FT_TYPEOF( x )63 ) #define FT_PIX_ROUND( x ) FT_PIX_FLOOR( (x) + 32 ) #define FT_PIX_CEIL( x ) FT_PIX_FLOOR( (x) + 63 ) /* specialized versions (for signed values) */ /* that don't produce run-time errors due to integer overflow */ #define FT_PAD_ROUND_LONG( x, n ) FT_PAD_FLOOR( ADD_LONG( (x), (n) / 2 ), \ n ) #define FT_PAD_CEIL_LONG( x, n ) FT_PAD_FLOOR( ADD_LONG( (x), (n) - 1 ), \ n ) #define FT_PIX_ROUND_LONG( x ) FT_PIX_FLOOR( ADD_LONG( (x), 32 ) ) #define FT_PIX_CEIL_LONG( x ) FT_PIX_FLOOR( ADD_LONG( (x), 63 ) ) #define FT_PAD_ROUND_INT32( x, n ) FT_PAD_FLOOR( ADD_INT32( (x), (n) / 2 ), \ n ) #define FT_PAD_CEIL_INT32( x, n ) FT_PAD_FLOOR( ADD_INT32( (x), (n) - 1 ), \ n ) #define FT_PIX_ROUND_INT32( x ) FT_PIX_FLOOR( ADD_INT32( (x), 32 ) ) #define FT_PIX_CEIL_INT32( x ) FT_PIX_FLOOR( ADD_INT32( (x), 63 ) ) /* * character classification functions -- since these are used to parse font * files, we must not use those in which are locale-dependent */ #define ft_isdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U ) #define ft_isxdigit( x ) ( ( (unsigned)(x) - '0' ) < 10U || \ ( (unsigned)(x) - 'a' ) < 6U || \ ( (unsigned)(x) - 'A' ) < 6U ) /* the next two macros assume ASCII representation */ #define ft_isupper( x ) ( ( (unsigned)(x) - 'A' ) < 26U ) #define ft_islower( x ) ( ( (unsigned)(x) - 'a' ) < 26U ) #define ft_isalpha( x ) ( ft_isupper( x ) || ft_islower( x ) ) #define ft_isalnum( x ) ( ft_isdigit( x ) || ft_isalpha( x ) ) /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** C H A R M A P S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* handle to internal charmap object */ typedef struct FT_CMapRec_* FT_CMap; /* handle to charmap class structure */ typedef const struct FT_CMap_ClassRec_* FT_CMap_Class; /* internal charmap object structure */ typedef struct FT_CMapRec_ { FT_CharMapRec charmap; FT_CMap_Class clazz; } FT_CMapRec; /* typecast any pointer to a charmap handle */ #define FT_CMAP( x ) ( (FT_CMap)( x ) ) /* obvious macros */ #define FT_CMAP_PLATFORM_ID( x ) FT_CMAP( x )->charmap.platform_id #define FT_CMAP_ENCODING_ID( x ) FT_CMAP( x )->charmap.encoding_id #define FT_CMAP_ENCODING( x ) FT_CMAP( x )->charmap.encoding #define FT_CMAP_FACE( x ) FT_CMAP( x )->charmap.face /* class method definitions */ typedef FT_Error (*FT_CMap_InitFunc)( FT_CMap cmap, FT_Pointer init_data ); typedef void (*FT_CMap_DoneFunc)( FT_CMap cmap ); typedef FT_UInt (*FT_CMap_CharIndexFunc)( FT_CMap cmap, FT_UInt32 char_code ); typedef FT_UInt (*FT_CMap_CharNextFunc)( FT_CMap cmap, FT_UInt32 *achar_code ); typedef FT_UInt (*FT_CMap_CharVarIndexFunc)( FT_CMap cmap, FT_CMap unicode_cmap, FT_UInt32 char_code, FT_UInt32 variant_selector ); typedef FT_Int (*FT_CMap_CharVarIsDefaultFunc)( FT_CMap cmap, FT_UInt32 char_code, FT_UInt32 variant_selector ); typedef FT_UInt32 * (*FT_CMap_VariantListFunc)( FT_CMap cmap, FT_Memory mem ); typedef FT_UInt32 * (*FT_CMap_CharVariantListFunc)( FT_CMap cmap, FT_Memory mem, FT_UInt32 char_code ); typedef FT_UInt32 * (*FT_CMap_VariantCharListFunc)( FT_CMap cmap, FT_Memory mem, FT_UInt32 variant_selector ); typedef struct FT_CMap_ClassRec_ { FT_ULong size; FT_CMap_InitFunc init; FT_CMap_DoneFunc done; FT_CMap_CharIndexFunc char_index; FT_CMap_CharNextFunc char_next; /* Subsequent entries are special ones for format 14 -- the variant */ /* selector subtable which behaves like no other */ FT_CMap_CharVarIndexFunc char_var_index; FT_CMap_CharVarIsDefaultFunc char_var_default; FT_CMap_VariantListFunc variant_list; FT_CMap_CharVariantListFunc charvariant_list; FT_CMap_VariantCharListFunc variantchar_list; } FT_CMap_ClassRec; #define FT_DECLARE_CMAP_CLASS( class_ ) \ FT_CALLBACK_TABLE const FT_CMap_ClassRec class_; #define FT_DEFINE_CMAP_CLASS( \ class_, \ size_, \ init_, \ done_, \ char_index_, \ char_next_, \ char_var_index_, \ char_var_default_, \ variant_list_, \ charvariant_list_, \ variantchar_list_ ) \ FT_CALLBACK_TABLE_DEF \ const FT_CMap_ClassRec class_ = \ { \ size_, \ init_, \ done_, \ char_index_, \ char_next_, \ char_var_index_, \ char_var_default_, \ variant_list_, \ charvariant_list_, \ variantchar_list_ \ }; /* create a new charmap and add it to charmap->face */ FT_BASE( FT_Error ) FT_CMap_New( FT_CMap_Class clazz, FT_Pointer init_data, FT_CharMap charmap, FT_CMap *acmap ); /* destroy a charmap and remove it from face's list */ FT_BASE( void ) FT_CMap_Done( FT_CMap cmap ); /* add LCD padding to CBox */ FT_BASE( void ) ft_lcd_padding( FT_BBox* cbox, FT_GlyphSlot slot, FT_Render_Mode mode ); #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING typedef void (*FT_Bitmap_LcdFilterFunc)( FT_Bitmap* bitmap, FT_Byte* weights ); /* This is the default LCD filter, an in-place, 5-tap FIR filter. */ FT_BASE( void ) ft_lcd_filter_fir( FT_Bitmap* bitmap, FT_LcdFiveTapFilter weights ); #endif /* FT_CONFIG_OPTION_SUBPIXEL_RENDERING */ /************************************************************************** * * @struct: * FT_Face_InternalRec * * @description: * This structure contains the internal fields of each FT_Face object. * These fields may change between different releases of FreeType. * * @fields: * max_points :: * The maximum number of points used to store the vectorial outline of * any glyph in this face. If this value cannot be known in advance, * or if the face isn't scalable, this should be set to 0. Only * relevant for scalable formats. * * max_contours :: * The maximum number of contours used to store the vectorial outline * of any glyph in this face. If this value cannot be known in * advance, or if the face isn't scalable, this should be set to 0. * Only relevant for scalable formats. * * transform_matrix :: * A 2x2 matrix of 16.16 coefficients used to transform glyph outlines * after they are loaded from the font. Only used by the convenience * functions. * * transform_delta :: * A translation vector used to transform glyph outlines after they are * loaded from the font. Only used by the convenience functions. * * transform_flags :: * Some flags used to classify the transform. Only used by the * convenience functions. * * services :: * A cache for frequently used services. It should be only accessed * with the macro `FT_FACE_LOOKUP_SERVICE`. * * incremental_interface :: * If non-null, the interface through which glyph data and metrics are * loaded incrementally for faces that do not provide all of this data * when first opened. This field exists only if * @FT_CONFIG_OPTION_INCREMENTAL is defined. * * no_stem_darkening :: * Overrides the module-level default, see @stem-darkening[cff], for * example. FALSE and TRUE toggle stem darkening on and off, * respectively, value~-1 means to use the module/driver default. * * random_seed :: * If positive, override the seed value for the CFF 'random' operator. * Value~0 means to use the font's value. Value~-1 means to use the * CFF driver's default. * * lcd_weights :: * lcd_filter_func :: * These fields specify the LCD filtering weights and callback function * for ClearType-style subpixel rendering. * * refcount :: * A counter initialized to~1 at the time an @FT_Face structure is * created. @FT_Reference_Face increments this counter, and * @FT_Done_Face only destroys a face if the counter is~1, otherwise it * simply decrements it. */ typedef struct FT_Face_InternalRec_ { FT_Matrix transform_matrix; FT_Vector transform_delta; FT_Int transform_flags; FT_ServiceCacheRec services; #ifdef FT_CONFIG_OPTION_INCREMENTAL FT_Incremental_InterfaceRec* incremental_interface; #endif FT_Char no_stem_darkening; FT_Int32 random_seed; #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING FT_LcdFiveTapFilter lcd_weights; /* filter weights, if any */ FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */ #endif FT_Int refcount; } FT_Face_InternalRec; /************************************************************************** * * @struct: * FT_Slot_InternalRec * * @description: * This structure contains the internal fields of each FT_GlyphSlot * object. These fields may change between different releases of * FreeType. * * @fields: * loader :: * The glyph loader object used to load outlines into the glyph slot. * * flags :: * Possible values are zero or FT_GLYPH_OWN_BITMAP. The latter * indicates that the FT_GlyphSlot structure owns the bitmap buffer. * * glyph_transformed :: * Boolean. Set to TRUE when the loaded glyph must be transformed * through a specific font transformation. This is _not_ the same as * the face transform set through FT_Set_Transform(). * * glyph_matrix :: * The 2x2 matrix corresponding to the glyph transformation, if * necessary. * * glyph_delta :: * The 2d translation vector corresponding to the glyph transformation, * if necessary. * * glyph_hints :: * Format-specific glyph hints management. * * load_flags :: * The load flags passed as an argument to @FT_Load_Glyph while * initializing the glyph slot. */ #define FT_GLYPH_OWN_BITMAP 0x1U typedef struct FT_Slot_InternalRec_ { FT_GlyphLoader loader; FT_UInt flags; FT_Bool glyph_transformed; FT_Matrix glyph_matrix; FT_Vector glyph_delta; void* glyph_hints; FT_Int32 load_flags; } FT_GlyphSlot_InternalRec; /************************************************************************** * * @struct: * FT_Size_InternalRec * * @description: * This structure contains the internal fields of each FT_Size object. * * @fields: * module_data :: * Data specific to a driver module. * * autohint_mode :: * The used auto-hinting mode. * * autohint_metrics :: * Metrics used by the auto-hinter. * */ typedef struct FT_Size_InternalRec_ { void* module_data; FT_Render_Mode autohint_mode; FT_Size_Metrics autohint_metrics; } FT_Size_InternalRec; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** M O D U L E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /************************************************************************** * * @struct: * FT_ModuleRec * * @description: * A module object instance. * * @fields: * clazz :: * A pointer to the module's class. * * library :: * A handle to the parent library object. * * memory :: * A handle to the memory manager. */ typedef struct FT_ModuleRec_ { FT_Module_Class* clazz; FT_Library library; FT_Memory memory; } FT_ModuleRec; /* typecast an object to an FT_Module */ #define FT_MODULE( x ) ( (FT_Module)(x) ) #define FT_MODULE_CLASS( x ) FT_MODULE( x )->clazz #define FT_MODULE_LIBRARY( x ) FT_MODULE( x )->library #define FT_MODULE_MEMORY( x ) FT_MODULE( x )->memory #define FT_MODULE_IS_DRIVER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_FONT_DRIVER ) #define FT_MODULE_IS_RENDERER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_RENDERER ) #define FT_MODULE_IS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_HINTER ) #define FT_MODULE_IS_STYLER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_STYLER ) #define FT_DRIVER_IS_SCALABLE( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_DRIVER_SCALABLE ) #define FT_DRIVER_USES_OUTLINES( x ) !( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_DRIVER_NO_OUTLINES ) #define FT_DRIVER_HAS_HINTER( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_DRIVER_HAS_HINTER ) #define FT_DRIVER_HINTS_LIGHTLY( x ) ( FT_MODULE_CLASS( x )->module_flags & \ FT_MODULE_DRIVER_HINTS_LIGHTLY ) /************************************************************************** * * @function: * FT_Get_Module_Interface * * @description: * Finds a module and returns its specific interface as a typeless * pointer. * * @input: * library :: * A handle to the library object. * * module_name :: * The module's name (as an ASCII string). * * @return: * A module-specific interface if available, 0 otherwise. * * @note: * You should better be familiar with FreeType internals to know which * module to look for, and what its interface is :-) */ FT_BASE( const void* ) FT_Get_Module_Interface( FT_Library library, const char* mod_name ); FT_BASE( FT_Pointer ) ft_module_get_service( FT_Module module, const char* service_id, FT_Bool global ); #ifdef FT_CONFIG_OPTION_ENVIRONMENT_PROPERTIES FT_BASE( FT_Error ) ft_property_string_set( FT_Library library, const FT_String* module_name, const FT_String* property_name, FT_String* value ); #endif /* */ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** F A C E, S I Z E & G L Y P H S L O T O B J E C T S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* a few macros used to perform easy typecasts with minimal brain damage */ #define FT_FACE( x ) ( (FT_Face)(x) ) #define FT_SIZE( x ) ( (FT_Size)(x) ) #define FT_SLOT( x ) ( (FT_GlyphSlot)(x) ) #define FT_FACE_DRIVER( x ) FT_FACE( x )->driver #define FT_FACE_LIBRARY( x ) FT_FACE_DRIVER( x )->root.library #define FT_FACE_MEMORY( x ) FT_FACE( x )->memory #define FT_FACE_STREAM( x ) FT_FACE( x )->stream #define FT_SIZE_FACE( x ) FT_SIZE( x )->face #define FT_SLOT_FACE( x ) FT_SLOT( x )->face #define FT_FACE_SLOT( x ) FT_FACE( x )->glyph #define FT_FACE_SIZE( x ) FT_FACE( x )->size /************************************************************************** * * @function: * FT_New_GlyphSlot * * @description: * It is sometimes useful to have more than one glyph slot for a given * face object. This function is used to create additional slots. All * of them are automatically discarded when the face is destroyed. * * @input: * face :: * A handle to a parent face object. * * @output: * aslot :: * A handle to a new glyph slot object. * * @return: * FreeType error code. 0 means success. */ FT_BASE( FT_Error ) FT_New_GlyphSlot( FT_Face face, FT_GlyphSlot *aslot ); /************************************************************************** * * @function: * FT_Done_GlyphSlot * * @description: * Destroys a given glyph slot. Remember however that all slots are * automatically destroyed with its parent. Using this function is not * always mandatory. * * @input: * slot :: * A handle to a target glyph slot. */ FT_BASE( void ) FT_Done_GlyphSlot( FT_GlyphSlot slot ); /* */ #define FT_REQUEST_WIDTH( req ) \ ( (req)->horiResolution \ ? ( (req)->width * (FT_Pos)(req)->horiResolution + 36 ) / 72 \ : (req)->width ) #define FT_REQUEST_HEIGHT( req ) \ ( (req)->vertResolution \ ? ( (req)->height * (FT_Pos)(req)->vertResolution + 36 ) / 72 \ : (req)->height ) /* Set the metrics according to a bitmap strike. */ FT_BASE( void ) FT_Select_Metrics( FT_Face face, FT_ULong strike_index ); /* Set the metrics according to a size request. */ FT_BASE( void ) FT_Request_Metrics( FT_Face face, FT_Size_Request req ); /* Match a size request against `available_sizes'. */ FT_BASE( FT_Error ) FT_Match_Size( FT_Face face, FT_Size_Request req, FT_Bool ignore_width, FT_ULong* size_index ); /* Use the horizontal metrics to synthesize the vertical metrics. */ /* If `advance' is zero, it is also synthesized. */ FT_BASE( void ) ft_synthesize_vertical_metrics( FT_Glyph_Metrics* metrics, FT_Pos advance ); /* Free the bitmap of a given glyphslot when needed (i.e., only when it */ /* was allocated with ft_glyphslot_alloc_bitmap). */ FT_BASE( void ) ft_glyphslot_free_bitmap( FT_GlyphSlot slot ); /* Preset bitmap metrics of an outline glyphslot prior to rendering */ /* and check whether the truncated bbox is too large for rendering. */ FT_BASE( FT_Bool ) ft_glyphslot_preset_bitmap( FT_GlyphSlot slot, FT_Render_Mode mode, const FT_Vector* origin ); /* Allocate a new bitmap buffer in a glyph slot. */ FT_BASE( FT_Error ) ft_glyphslot_alloc_bitmap( FT_GlyphSlot slot, FT_ULong size ); /* Set the bitmap buffer in a glyph slot to a given pointer. The buffer */ /* will not be freed by a later call to ft_glyphslot_free_bitmap. */ FT_BASE( void ) ft_glyphslot_set_bitmap( FT_GlyphSlot slot, FT_Byte* buffer ); /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** R E N D E R E R S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ #define FT_RENDERER( x ) ( (FT_Renderer)(x) ) #define FT_GLYPH( x ) ( (FT_Glyph)(x) ) #define FT_BITMAP_GLYPH( x ) ( (FT_BitmapGlyph)(x) ) #define FT_OUTLINE_GLYPH( x ) ( (FT_OutlineGlyph)(x) ) typedef struct FT_RendererRec_ { FT_ModuleRec root; FT_Renderer_Class* clazz; FT_Glyph_Format glyph_format; FT_Glyph_Class glyph_class; FT_Raster raster; FT_Raster_Render_Func raster_render; FT_Renderer_RenderFunc render; } FT_RendererRec; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** F O N T D R I V E R S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* typecast a module into a driver easily */ #define FT_DRIVER( x ) ( (FT_Driver)(x) ) /* typecast a module as a driver, and get its driver class */ #define FT_DRIVER_CLASS( x ) FT_DRIVER( x )->clazz /************************************************************************** * * @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: * root :: * Contains the fields of the root module class. * * clazz :: * A pointer to the font driver's class. Note that this is NOT * root.clazz. 'class' wasn't used as it is a reserved word in C++. * * faces_list :: * The list of faces currently opened by this driver. * * glyph_loader :: * Unused. Used to be glyph loader for all faces managed by this * driver. */ typedef struct FT_DriverRec_ { FT_ModuleRec root; FT_Driver_Class clazz; FT_ListRec faces_list; FT_GlyphLoader glyph_loader; } FT_DriverRec; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /**** ****/ /**** ****/ /**** L I B R A R I E S ****/ /**** ****/ /**** ****/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /************************************************************************** * * @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. * * version_major :: * The major version number of the library. * * version_minor :: * The minor version number of the library. * * version_patch :: * The current patch level of the library. * * num_modules :: * The number of modules currently registered within this library. * This is set to 0 for new libraries. New modules are added through * the FT_Add_Module() API function. * * modules :: * A table used to store handles to the currently registered * modules. Note that each font driver contains a list of its opened * faces. * * renderers :: * The list of renderers currently registered within the library. * * cur_renderer :: * The current outline renderer. This is a shortcut used to avoid * parsing the list on each call to FT_Outline_Render(). It is a * handle to the current renderer for the FT_GLYPH_FORMAT_OUTLINE * format. * * auto_hinter :: * The auto-hinter module interface. * * debug_hooks :: * An array of four function pointers that allow debuggers to hook into * a font format's interpreter. Currently, only the TrueType bytecode * debugger uses this. * * lcd_weights :: * The LCD filter weights for ClearType-style subpixel rendering. * * lcd_filter_func :: * The LCD filtering callback function for for ClearType-style subpixel * rendering. * * lcd_geometry :: * This array specifies LCD subpixel geometry and controls Harmony LCD * rendering technique, alternative to ClearType. * * pic_container :: * Contains global structs and tables, instead of defining them * globally. * * refcount :: * A counter initialized to~1 at the time an @FT_Library structure is * created. @FT_Reference_Library increments this counter, and * @FT_Done_Library only destroys a library if the counter is~1, * otherwise it simply decrements it. */ typedef struct FT_LibraryRec_ { FT_Memory memory; /* library's memory manager */ FT_Int version_major; FT_Int version_minor; FT_Int version_patch; FT_UInt num_modules; FT_Module modules[FT_MAX_MODULES]; /* module objects */ FT_ListRec renderers; /* list of renderers */ FT_Renderer cur_renderer; /* current outline renderer */ FT_Module auto_hinter; FT_DebugHook_Func debug_hooks[4]; #ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING FT_LcdFiveTapFilter lcd_weights; /* filter weights, if any */ FT_Bitmap_LcdFilterFunc lcd_filter_func; /* filtering callback */ #else FT_Vector lcd_geometry[3]; /* RGB subpixel positions */ #endif FT_Int refcount; } FT_LibraryRec; FT_BASE( FT_Renderer ) FT_Lookup_Renderer( FT_Library library, FT_Glyph_Format format, FT_ListNode* node ); FT_BASE( FT_Error ) FT_Render_Glyph_Internal( FT_Library library, FT_GlyphSlot slot, FT_Render_Mode render_mode ); typedef const char* (*FT_Face_GetPostscriptNameFunc)( FT_Face face ); typedef FT_Error (*FT_Face_GetGlyphNameFunc)( FT_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ); typedef FT_UInt (*FT_Face_GetGlyphNameIndexFunc)( FT_Face face, const FT_String* glyph_name ); #ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM /************************************************************************** * * @function: * FT_New_Memory * * @description: * Creates a new memory object. * * @return: * A pointer to the new memory object. 0 in case of error. */ FT_BASE( FT_Memory ) FT_New_Memory( void ); /************************************************************************** * * @function: * FT_Done_Memory * * @description: * Discards memory manager. * * @input: * memory :: * A handle to the memory manager. */ FT_BASE( void ) FT_Done_Memory( FT_Memory memory ); #endif /* !FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */ /* 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 FT_EXPORT_VAR( FT_Raster_Funcs ) ft_default_raster; #endif /************************************************************************** * * @macro: * FT_DEFINE_OUTLINE_FUNCS * * @description: * Used to initialize an instance of FT_Outline_Funcs struct. The struct * will be allocated in the global scope (or the scope where the macro is * used). */ #define FT_DEFINE_OUTLINE_FUNCS( \ class_, \ move_to_, \ line_to_, \ conic_to_, \ cubic_to_, \ shift_, \ delta_ ) \ static const FT_Outline_Funcs class_ = \ { \ move_to_, \ line_to_, \ conic_to_, \ cubic_to_, \ shift_, \ delta_ \ }; /************************************************************************** * * @macro: * FT_DEFINE_RASTER_FUNCS * * @description: * Used to initialize an instance of FT_Raster_Funcs struct. The struct * will be allocated in the global scope (or the scope where the macro is * used). */ #define FT_DEFINE_RASTER_FUNCS( \ class_, \ glyph_format_, \ raster_new_, \ raster_reset_, \ raster_set_mode_, \ raster_render_, \ raster_done_ ) \ const FT_Raster_Funcs class_ = \ { \ glyph_format_, \ raster_new_, \ raster_reset_, \ raster_set_mode_, \ raster_render_, \ raster_done_ \ }; /************************************************************************** * * @macro: * FT_DEFINE_GLYPH * * @description: * The struct will be allocated in the global scope (or the scope where * the macro is used). */ #define FT_DEFINE_GLYPH( \ class_, \ size_, \ format_, \ init_, \ done_, \ copy_, \ transform_, \ bbox_, \ prepare_ ) \ FT_CALLBACK_TABLE_DEF \ const FT_Glyph_Class class_ = \ { \ size_, \ format_, \ init_, \ done_, \ copy_, \ transform_, \ bbox_, \ prepare_ \ }; /************************************************************************** * * @macro: * FT_DECLARE_RENDERER * * @description: * Used to create a forward declaration of a FT_Renderer_Class struct * instance. * * @macro: * FT_DEFINE_RENDERER * * @description: * Used to initialize an instance of FT_Renderer_Class struct. * * The struct will be allocated in the global scope (or the scope where * the macro is used). */ #define FT_DECLARE_RENDERER( class_ ) \ FT_EXPORT_VAR( const FT_Renderer_Class ) class_; #define FT_DEFINE_RENDERER( \ class_, \ flags_, \ size_, \ name_, \ version_, \ requires_, \ interface_, \ init_, \ done_, \ get_interface_, \ glyph_format_, \ render_glyph_, \ transform_glyph_, \ get_glyph_cbox_, \ set_mode_, \ raster_class_ ) \ FT_CALLBACK_TABLE_DEF \ const FT_Renderer_Class class_ = \ { \ FT_DEFINE_ROOT_MODULE( flags_, \ size_, \ name_, \ version_, \ requires_, \ interface_, \ init_, \ done_, \ get_interface_ ) \ glyph_format_, \ \ render_glyph_, \ transform_glyph_, \ get_glyph_cbox_, \ set_mode_, \ \ raster_class_ \ }; /************************************************************************** * * @macro: * FT_DECLARE_MODULE * * @description: * Used to create a forward declaration of a FT_Module_Class struct * instance. * * @macro: * FT_DEFINE_MODULE * * @description: * Used to initialize an instance of an FT_Module_Class struct. * * The struct will be allocated in the global scope (or the scope where * the macro is used). * * @macro: * FT_DEFINE_ROOT_MODULE * * @description: * Used to initialize an instance of an FT_Module_Class struct inside * another struct that contains it or in a function that initializes that * containing struct. */ #define FT_DECLARE_MODULE( class_ ) \ FT_CALLBACK_TABLE \ const FT_Module_Class class_; #define FT_DEFINE_ROOT_MODULE( \ flags_, \ size_, \ name_, \ version_, \ requires_, \ interface_, \ init_, \ done_, \ get_interface_ ) \ { \ flags_, \ size_, \ \ name_, \ version_, \ requires_, \ \ interface_, \ \ init_, \ done_, \ get_interface_, \ }, #define FT_DEFINE_MODULE( \ class_, \ flags_, \ size_, \ name_, \ version_, \ requires_, \ interface_, \ init_, \ done_, \ get_interface_ ) \ FT_CALLBACK_TABLE_DEF \ const FT_Module_Class class_ = \ { \ flags_, \ size_, \ \ name_, \ version_, \ requires_, \ \ interface_, \ \ init_, \ done_, \ get_interface_, \ }; FT_END_HEADER #endif /* FTOBJS_H_ */ /* END */