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freetype/src/shared/t1types.h
David Turner d42c68e855 many new small, but important, changes there: 
- modified the interface of the "sfnt" module. There is now a function
    called "load_format_tag", and another called "load_directory".

    The first one is in charge of returning the 4-byte tag located at
    the beginning of a given font file. It understand TrueType collections
    and parses them automatically

    The second loads the table directory that is located just after
    the format tag.

    This is useful, because the "SFNT" storage scheme can be used by
    several distinct formats, each with its own format tag.

    The TrueType driver now checks the format tag in "src/truetype/ttobjs.c"

  - made some changes to "src/shared/t1types.h" to clearly separate the
    Type 1 font content from the rest of the T1_Face structure. This
    will be useful when adding the CFF/Type2 driver that will be able
    to reuse the "T1_Font" structure within a "TT_Font" one (which
    really describes a SFNT-based font file).

    Some changes in "src/type1" were thus performed to reflect this.
    Note that the current type1 driver will be discontinued in a
    distant future. More on this later..
2000-01-27 13:56:02 +00:00

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/*******************************************************************
*
* t1types.h 1.0
*
* Basic Type1/Type2 type definitions and interface.
*
* This code is shared by the Type1 and Type2 drivers
*
*
* Copyright 1996-2000 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 T1TYPES_H
#define T1TYPES_H
#include <freetype.h>
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*** ***/
/*** ***/
/*** DEFINITIONS OF BASIC DATA TYPES ***/
/*** ***/
/*** ***/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* The REDEFINE macro is used to convert a FreeType generic type into */
/* a TrueType-specific one. It simply replaces the "FT_" prefix by "T1_" */
/* in order to define compatible T1_Long, T1_Error, T1_Outline, etc.. */
/* */
#undef REDEFINE
#define REDEFINE( type ) typedef FT_##type T1_##type
/* <Type> T1_Bool */
/* */
/* <Description> */
/* A simple typedef of unsigned char, used for simple booleans. */
/* */
REDEFINE( Bool );
/* <Type> T1_FWord */
/* */
/* <Description> */
/* a signed 16-bit integer used to store a distance in original */
/* font units. */
/* */
REDEFINE( FWord );
/* <Type> T1_UFWord */
/* */
/* <Description> */
/* an unsigned 16-bit integer used to store a distance in original */
/* font units. */
/* */
REDEFINE( UFWord );
/* <Type> T1_Char */
/* */
/* <Description> */
/* a simple typedef for the _signed_ char type. */
/* */
REDEFINE( Char );
/* <Type> T1_Byte */
/* */
/* <Description> */
/* a simple typedef for the _unsigned_ char type. */
/* */
REDEFINE( Byte );
/* <Type> T1_String */
/* */
/* <Description> */
/* a simple typedef for the char type, used for strings usually. */
/* */
REDEFINE( String );
/* <Type> T1_Short */
/* */
/* <Description> */
/* a typedef for signed short */
/* */
REDEFINE( Short );
/* <Type> T1_UShort */
/* */
/* <Description> */
/* a typedef for unsigned short */
/* */
REDEFINE( UShort );
/* <Type> FT_Int */
/* */
/* <Description> */
/* a typedef for the int type */
/* */
REDEFINE( Int );
/* <Type> FT_UInt */
/* */
/* <Description> */
/* a typedef for the unsigned int type */
/* */
REDEFINE( UInt );
/* <Type> T1_Long */
/* */
/* <Description> */
/* a typedef for signed long */
/* */
REDEFINE( Long );
/* <Type> T1_ULong */
/* */
/* <Description> */
/* a typedef for unsigned long */
/* */
REDEFINE( ULong );
/* <Type> T1_F2Dot14 */
/* */
/* <Description> */
/* a signed 2.14 fixed float used for unit vectors */
/* */
REDEFINE( F2Dot14 );
/* <Type> T1_F26Dot6 */
/* */
/* <Description> */
/* a signed 26.6 fixed float used for vectorial pixel coordinates */
/* */
REDEFINE( F26Dot6 );
/* <Type> T1_Fixed */
/* */
/* <Description> */
/* This type is used to store 16.16 fixed float values, like */
/* scales or matrix coefficients.. */
/* */
REDEFINE( Fixed );
/* <Type> T1_Pos */
/* */
/* <Description> */
/* The type T1_Pos is a 32-bits integer used to store vectorial */
/* coordinates. Depending on the context, these can represent */
/* distances in integer font units, or 26.6 fixed float pixel */
/* coordinates.. */
/* */
REDEFINE( Pos );
/* <Struct> T1_Vector */
/* */
/* <Description> */
/* A simple structure used to store a 2d vector, coordinates */
/* are of the T1_Pos type. */
/* */
/* <Fields> */
/* x :: horizontal coordinate */
/* y :: vertical coordinate */
/* */
REDEFINE( Vector );
/* <Struct> T1_UnitVector */
/* */
/* <Description> */
/* A simple structure used to store a 2d vector unit vector. */
/* uses T1_F2Dot14 types. */
/* */
/* <Fields> */
/* x :: horizontal coordinate */
/* y :: vertical coordinate */
/* */
REDEFINE( UnitVector );
/* <Struct> T1_Matrix */
/* */
/* <Description> */
/* A simple structure used to store a 2x2 matrix. Coefficients */
/* are in 16.16 fixed float 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 */
/* */
REDEFINE( Matrix );
/* <Struct> T1_BBox */
/* */
/* <Description> */
/* A structure used to hold an outline's bounding box, i.e. */
/* the coordinates of its extrema in the horizontal and vertical */
/* directions. */
/* */
/* <Fields> */
/* xMin :: the horizontal minimum (left-most) */
/* yMin :: the vertical minimum (bottom-most) */
/* xMax :: the horizontal maximum (right-most) */
/* yMax :: the vertical maximum (top-most) */
/* */
REDEFINE( BBox );
/* <Type> T1_Error */
/* */
/* <Description> */
/* The FreeType error code type. A value of 0 is always */
/* interpreted as a succesful operation. */
/* */
REDEFINE( Error );
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*** ***/
/*** ***/
/*** REQUIRED TYPE1/TYPE2 TABLES DEFINITIONS ***/
/*** ***/
/*** ***/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/***********************************************************************/
/* */
/* <Struct> T1_Encoding */
/* */
/* <Description> */
/* A structure modeling a custom encoding */
/* */
/* <Fields> */
/* num_chars :: number of char codes in encoding. Usually 256 */
/* code_first :: lower char code in encoding */
/* code_last :: higher char code in encoding */
/* */
/* char_code :: array of character codes */
/* char_index :: array of correpsonding glyph indices */
/* char_name :: array of correpsonding glyph names */
/* */
typedef struct T1_Encoding_
{
T1_Int num_chars;
T1_Int code_first;
T1_Int code_last;
T1_Short* char_index;
T1_String** char_name;
} T1_Encoding;
typedef enum T1_EncodingType_
{
t1_encoding_none = 0,
t1_encoding_array,
t1_encoding_standard,
t1_encoding_expert
} T1_EncodingType;
typedef struct T1_Font_
{
/* font info dictionary */
T1_String* version;
T1_String* notice;
T1_String* full_name;
T1_String* family_name;
T1_String* weight;
T1_Long italic_angle;
T1_Bool is_fixed_pitch;
T1_Short underline_position;
T1_UShort underline_thickness;
/* private dictionary */
T1_Int unique_id;
T1_Int lenIV;
T1_Byte num_blues;
T1_Byte num_other_blues;
T1_Byte num_family_blues;
T1_Byte num_family_other_blues;
T1_Short blue_values[14];
T1_Short other_blues[10];
T1_Short family_blues [14];
T1_Short family_other_blues[10];
T1_Fixed blue_scale;
T1_Int blue_shift;
T1_Int blue_fuzz;
T1_UShort standard_width;
T1_UShort standard_height;
T1_Byte num_snap_widths;
T1_Byte num_snap_heights;
T1_Bool force_bold;
T1_Bool round_stem_up;
T1_Short stem_snap_widths [13]; /* reserve one place for the std */
T1_Short stem_snap_heights[13]; /* reserve one place for the std */
T1_Long language_group;
T1_Long password;
T1_Short min_feature[2];
/* top-level dictionary */
FT_String* font_name;
T1_EncodingType encoding_type;
T1_Encoding encoding;
T1_Byte* subrs_block;
T1_Byte* charstrings_block;
T1_Byte* glyph_names_block;
T1_Int num_subrs;
T1_Byte** subrs;
T1_Int* subrs_len;
T1_Int num_glyphs;
T1_String** glyph_names; /* array of glyph names */
T1_Byte** charstrings; /* array of glyph charstrings */
T1_Int* charstrings_len;
T1_Byte paint_type;
T1_Byte font_type;
T1_Matrix font_matrix;
T1_BBox font_bbox;
T1_Long font_id;
T1_Int stroke_width;
} T1_Font;
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*** ***/
/*** ***/
/*** ORIGINAL T1_FACE CLASS DEFINITION ***/
/*** ***/
/*** ***/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*** ***/
/*** ***/
/*** This structure/class is defined here because it is common ***/
/*** to the following formats : TTF, OpenType-TT and OpenType-CFF ***/
/*** ***/
/*** Note however that the classes TT_Size, TT_GlyphSlot and ***/
/*** TT_CharMap are not shared between font drivers, and are ***/
/*** thus defined normally in "drivers/truetype/ttobjs.h" ***/
/*** ***/
/*** ***/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
typedef struct T1_FaceRec_* T1_Face;
/***************************************************/
/* */
/* T1_Face : */
/* */
/* Type1 face record.. */
/* */
typedef struct T1_FaceRec_
{
FT_FaceRec root;
T1_Font type1;
} T1_FaceRec;
#endif /* T1TYPES_H */
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