📄 ftobjs.h
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/***************************************************************************/
/* */
/* ftobjs.h */
/* */
/* The FreeType private base classes (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006 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 <ft2build.h>
#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
#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) )
#define FT_PAD_FLOOR( x, n ) ( (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) & ~63 )
#define FT_PIX_ROUND( x ) FT_PIX_FLOOR( (x) + 32 )
#define FT_PIX_CEIL( x ) FT_PIX_FLOOR( (x) + 63 )
/*
* Return the highest power of 2 that is <= value; this correspond to
* the highest bit in a given 32-bit value.
*/
FT_BASE( FT_UInt32 )
ft_highpow2( FT_UInt32 value );
/*
* character classification functions -- since these are used to parse
* font files, we must not use those in <ctypes.h> 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;
/* typecase 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 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;
} FT_CMap_ClassRec;
/* 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 );
/*************************************************************************/
/* */
/* <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 maximal 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 maximal 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. */
/* */
/* ignore_unpatented_hinter :: */
/* This boolean flag instructs the glyph loader to ignore the */
/* native font hinter, if one is found. This is exclusively used */
/* in the case when the unpatented hinter is compiled within the */
/* library. */
/* */
typedef struct FT_Face_InternalRec_
{
#ifdef FT_CONFIG_OPTION_OLD_INTERNALS
FT_UShort reserved1;
FT_Short reserved2;
#endif
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_Bool ignore_unpatented_hinter;
} 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. */
/* */
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