kc3-lang/freetype/include/ftbdf.h

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  Date : 2015-01-17T20:41:43
  

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• include/ftbdf.h

• /***************************************************************************/
  /*                                                                         */
  /*  ftbdf.h                                                                */
  /*                                                                         */
  /*    FreeType API for accessing BDF-specific strings (specification).     */
  /*                                                                         */
  /*  Copyright 2002-2015 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 __FTBDF_H__
  #define __FTBDF_H__
  
  #include <ft2build.h>
  #include FT_FREETYPE_H
  
  #ifdef FREETYPE_H
  #error "freetype.h of FreeType 1 has been loaded!"
  #error "Please fix the directory search order for header files"
  #error "so that freetype.h of FreeType 2 is found first."
  #endif
  
  
  FT_BEGIN_HEADER
  
  
    /*************************************************************************/
    /*                                                                       */
    /* <Section>                                                             */
    /*    bdf_fonts                                                          */
    /*                                                                       */
    /* <Title>                                                               */
    /*    BDF and PCF Files                                                  */
    /*                                                                       */
    /* <Abstract>                                                            */
    /*    BDF and PCF specific API.                                          */
    /*                                                                       */
    /* <Description>                                                         */
    /*    This section contains the declaration of functions specific to BDF */
    /*    and PCF fonts.                                                     */
    /*                                                                       */
    /*************************************************************************/
  
  
    /**********************************************************************
     *
     * @enum:
     *    BDF_PropertyType
     *
     * @description:
     *    A list of BDF property types.
     *
     * @values:
     *    BDF_PROPERTY_TYPE_NONE ::
     *      Value~0 is used to indicate a missing property.
     *
     *    BDF_PROPERTY_TYPE_ATOM ::
     *      Property is a string atom.
     *
     *    BDF_PROPERTY_TYPE_INTEGER ::
     *      Property is a 32-bit signed integer.
     *
     *    BDF_PROPERTY_TYPE_CARDINAL ::
     *      Property is a 32-bit unsigned integer.
     */
    typedef enum  BDF_PropertyType_
    {
      BDF_PROPERTY_TYPE_NONE     = 0,
      BDF_PROPERTY_TYPE_ATOM     = 1,
      BDF_PROPERTY_TYPE_INTEGER  = 2,
      BDF_PROPERTY_TYPE_CARDINAL = 3
  
    } BDF_PropertyType;
  
  
    /**********************************************************************
     *
     * @type:
     *    BDF_Property
     *
     * @description:
     *    A handle to a @BDF_PropertyRec structure to model a given
     *    BDF/PCF property.
     */
    typedef struct BDF_PropertyRec_*  BDF_Property;
  
  
   /**********************************************************************
    *
    * @struct:
    *    BDF_PropertyRec
    *
    * @description:
    *    This structure models a given BDF/PCF property.
    *
    * @fields:
    *    type ::
    *      The property type.
    *
    *    u.atom ::
    *      The atom string, if type is @BDF_PROPERTY_TYPE_ATOM.  May be
    *      NULL, indicating an empty string.
    *
    *    u.integer ::
    *      A signed integer, if type is @BDF_PROPERTY_TYPE_INTEGER.
    *
    *    u.cardinal ::
    *      An unsigned integer, if type is @BDF_PROPERTY_TYPE_CARDINAL.
    */
    typedef struct  BDF_PropertyRec_
    {
      BDF_PropertyType  type;
      union {
        const char*     atom;
        FT_Int32        integer;
        FT_UInt32       cardinal;
  
      } u;
  
    } BDF_PropertyRec;
  
  
   /**********************************************************************
    *
    * @function:
    *    FT_Get_BDF_Charset_ID
    *
    * @description:
    *    Retrieve a BDF font character set identity, according to
    *    the BDF specification.
    *
    * @input:
    *    face ::
    *       A handle to the input face.
    *
    * @output:
    *    acharset_encoding ::
    *       Charset encoding, as a C~string, owned by the face.
    *
    *    acharset_registry ::
    *       Charset registry, as a C~string, owned by the face.
    *
    * @return:
    *   FreeType error code.  0~means success.
    *
    * @note:
    *   This function only works with BDF faces, returning an error otherwise.
    */
    FT_EXPORT( FT_Error )
    FT_Get_BDF_Charset_ID( FT_Face       face,
                           const char*  *acharset_encoding,
                           const char*  *acharset_registry );
  
  
   /**********************************************************************
    *
    * @function:
    *    FT_Get_BDF_Property
    *
    * @description:
    *    Retrieve a BDF property from a BDF or PCF font file.
    *
    * @input:
    *    face :: A handle to the input face.
    *
    *    name :: The property name.
    *
    * @output:
    *    aproperty :: The property.
    *
    * @return:
    *   FreeType error code.  0~means success.
    *
    * @note:
    *   This function works with BDF _and_ PCF fonts.  It returns an error
    *   otherwise.  It also returns an error if the property is not in the
    *   font.
    *
    *   A `property' is a either key-value pair within the STARTPROPERTIES
    *   ... ENDPROPERTIES block of a BDF font or a key-value pair from the
    *   `info->props' array within a `FontRec' structure of a PCF font.
    *
    *   Integer properties are always stored as `signed' within PCF fonts;
    *   consequently, @BDF_PROPERTY_TYPE_CARDINAL is a possible return value
    *   for BDF fonts only.
    *
    *   In case of error, `aproperty->type' is always set to
    *   @BDF_PROPERTY_TYPE_NONE.
    */
    FT_EXPORT( FT_Error )
    FT_Get_BDF_Property( FT_Face           face,
                         const char*       prop_name,
                         BDF_PropertyRec  *aproperty );
  
    /* */
  
  FT_END_HEADER
  
  #endif /* __FTBDF_H__ */
  
  
  /* END */
  

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