freetype1/test/arabic.h

   1 /****************************************************************************/
   2 /*                                                                          */
   3 /*  The FreeType project -- a free and portable quality TrueType renderer.  */
   4 /*                                                                          */
   5 /*  Copyright 1996-1999 by                                                  */
   6 /*  D. Turner, R.Wilhelm, and W. Lemberg                                    */
   7 /*                                                                          */
   8 /*  arabic -- An implementation of the contextual algorithm given in the    */
   9 /*  Unicode 2.0 book to assign the `isolated', `initial', `medial', and     */
  10 /*  `final' properties to an input string of character codes for the Arabic */
  11 /*  script.                                                                 */
  12 /*                                                                          */
  13 /****************************************************************************/
  14
  15
  16 #include "freetype.h"
  17 #include "ftxopen.h"
  18
  19
  20   enum  joining_type_
  21   {
  22     isolated = 1,       /* nominal        */
  23     final    = 2,       /* right_joining  */
  24     initial  = 4,       /* left_joining   */
  25     medial   = 8        /* double_joining */
  26   };
  27
  28   typedef enum joining_type_  joining_type;
  29
  30
  31   /* A glyph's property value as needed by e.g. TT_GSUB_Apply_String()
  32      specifies which features should *not* be applied                  */
  33
  34   enum  arabic_glyph_property_
  35   {
  36     isolated_p = final    | initial | medial,
  37     final_p    = isolated | initial | medial,
  38     initial_p  = isolated | final   | medial,
  39     medial_p   = isolated | final   | initial
  40   };
  41
  42   typedef enum arabic_glyph_property_  arabic_glyph_property;
  43
  44
  45   enum  joining_class_
  46   {
  47     right,
  48     left,               /* not used */
  49     dual,
  50     causing,
  51     none,
  52     transparent
  53   };
  54
  55   typedef enum joining_class_  joining_class;
  56
  57
  58   TT_Error  Assign_Arabic_Properties( TT_UShort*  string,
  59                                       TT_UShort*  properties,
  60                                       TT_UShort   length );
  61   TT_Error  Build_Arabic_Glyph_Properties( TT_CharMap        char_map,
  62                                            TT_UShort         max_glyphs,
  63                                            TTO_GDEFHeader**  gdef );
  64
  65
  66 /* End */