forked from minhngoc25a/freetype2
211 lines
6.6 KiB
C
211 lines
6.6 KiB
C
/***************************************************************************/
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/* */
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/* ftbdf.h */
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/* */
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/* FreeType API for accessing BDF-specific strings (specification). */
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/* */
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/* Copyright 2002-2004, 2006, 2009, 2014 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef __FTBDF_H__
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#define __FTBDF_H__
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#ifdef FREETYPE_H
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#error "freetype.h of FreeType 1 has been loaded!"
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#error "Please fix the directory search order for header files"
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#error "so that freetype.h of FreeType 2 is found first."
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#endif
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FT_BEGIN_HEADER
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/*************************************************************************/
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/* */
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/* <Section> */
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/* bdf_fonts */
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/* */
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/* <Title> */
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/* BDF and PCF Files */
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/* */
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/* <Abstract> */
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/* BDF and PCF specific API. */
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/* */
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/* <Description> */
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/* This section contains the declaration of functions specific to BDF */
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/* and PCF fonts. */
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/* */
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/*************************************************************************/
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/**********************************************************************
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*
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* @enum:
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* FT_PropertyType
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*
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* @description:
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* A list of BDF property types.
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*
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* @values:
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* BDF_PROPERTY_TYPE_NONE ::
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* Value~0 is used to indicate a missing property.
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*
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* BDF_PROPERTY_TYPE_ATOM ::
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* Property is a string atom.
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*
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* BDF_PROPERTY_TYPE_INTEGER ::
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* Property is a 32-bit signed integer.
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*
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* BDF_PROPERTY_TYPE_CARDINAL ::
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* Property is a 32-bit unsigned integer.
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*/
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typedef enum BDF_PropertyType_
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{
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BDF_PROPERTY_TYPE_NONE = 0,
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BDF_PROPERTY_TYPE_ATOM = 1,
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BDF_PROPERTY_TYPE_INTEGER = 2,
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BDF_PROPERTY_TYPE_CARDINAL = 3
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} BDF_PropertyType;
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/**********************************************************************
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*
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* @type:
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* BDF_Property
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*
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* @description:
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* A handle to a @BDF_PropertyRec structure to model a given
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* BDF/PCF property.
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*/
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typedef struct BDF_PropertyRec_* BDF_Property;
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/**********************************************************************
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*
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* @struct:
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* BDF_PropertyRec
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*
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* @description:
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* This structure models a given BDF/PCF property.
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*
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* @fields:
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* type ::
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* The property type.
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*
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* u.atom ::
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* The atom string, if type is @BDF_PROPERTY_TYPE_ATOM. May be
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* NULL, indicating an empty string.
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*
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* u.integer ::
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* A signed integer, if type is @BDF_PROPERTY_TYPE_INTEGER.
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*
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* u.cardinal ::
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* An unsigned integer, if type is @BDF_PROPERTY_TYPE_CARDINAL.
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*/
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typedef struct BDF_PropertyRec_
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{
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BDF_PropertyType type;
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union {
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const char* atom;
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FT_Int32 integer;
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FT_UInt32 cardinal;
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} u;
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} BDF_PropertyRec;
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/**********************************************************************
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*
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* @function:
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* FT_Get_BDF_Charset_ID
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*
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* @description:
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* Retrieve a BDF font character set identity, according to
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* the BDF specification.
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*
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* @input:
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* face ::
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* A handle to the input face.
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*
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* @output:
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* acharset_encoding ::
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* Charset encoding, as a C~string, owned by the face.
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*
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* acharset_registry ::
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* Charset registry, as a C~string, owned by the face.
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*
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* @return:
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* FreeType error code. 0~means success.
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*
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* @note:
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* This function only works with BDF faces, returning an error otherwise.
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*/
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FT_EXPORT( FT_Error )
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FT_Get_BDF_Charset_ID( FT_Face face,
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const char* *acharset_encoding,
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const char* *acharset_registry );
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/**********************************************************************
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*
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* @function:
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* FT_Get_BDF_Property
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*
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* @description:
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* Retrieve a BDF property from a BDF or PCF font file.
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*
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* @input:
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* face :: A handle to the input face.
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*
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* name :: The property name.
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*
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* @output:
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* aproperty :: The property.
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*
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* @return:
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* FreeType error code. 0~means success.
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*
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* @note:
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* This function works with BDF _and_ PCF fonts. It returns an error
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* otherwise. It also returns an error if the property is not in the
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* font.
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*
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* A `property' is a either key-value pair within the STARTPROPERTIES
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* ... ENDPROPERTIES block of a BDF font or a key-value pair from the
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* `info->props' array within a `FontRec' structure of a PCF font.
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*
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* Integer properties are always stored as `signed' within PCF fonts;
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* consequently, @BDF_PROPERTY_TYPE_CARDINAL is a possible return value
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* for BDF fonts only.
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*
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* In case of error, `aproperty->type' is always set to
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* @BDF_PROPERTY_TYPE_NONE.
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*/
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FT_EXPORT( FT_Error )
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FT_Get_BDF_Property( FT_Face face,
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const char* prop_name,
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BDF_PropertyRec *aproperty );
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/* */
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FT_END_HEADER
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#endif /* __FTBDF_H__ */
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/* END */
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