src/hb-old/harfbuzz-buffer-private.h

   1 /*
   2  * Copyright (C) 1998-2004  David Turner and Werner Lemberg
   3  * Copyright (C) 2004,2007  Red Hat, Inc.
   4  *
   5  * This is part of HarfBuzz, an OpenType Layout engine library.
   6  *
   7  * Permission is hereby granted, without written agreement and without
   8  * license or royalty fees, to use, copy, modify, and distribute this
   9  * software and its documentation for any purpose, provided that the
  10  * above copyright notice and the following two paragraphs appear in
  11  * all copies of this software.
  12  *
  13  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  14  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  15  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  16  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  17  * DAMAGE.
  18  *
  19  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  20  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  21  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  22  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  23  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  24  *
  25  * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
  26  */
  27
  28 #ifndef HARFBUZZ_BUFFER_PRIVATE_H
  29 #define HARFBUZZ_BUFFER_PRIVATE_H
  30
  31 #include "harfbuzz-impl.h"
  32 #include "harfbuzz-buffer.h"
  33
  34 HB_BEGIN_HEADER
  35
  36 #define HB_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
  37
  38 HB_INTERNAL void
  39 _hb_buffer_swap( HB_Buffer buffer );
  40
  41 HB_INTERNAL void
  42 _hb_buffer_clear_output( HB_Buffer buffer );
  43
  44 HB_INTERNAL HB_Error
  45 _hb_buffer_clear_positions( HB_Buffer buffer );
  46
  47 HB_INTERNAL HB_Error
  48 _hb_buffer_add_output_glyphs( HB_Buffer  buffer,
  49                               HB_UShort  num_in,
  50                               HB_UShort  num_out,
  51                               HB_UShort *glyph_data,
  52                               HB_UShort  component,
  53                               HB_UShort  ligID );
  54
  55 HB_INTERNAL HB_Error
  56 _hb_buffer_add_output_glyph ( HB_Buffer buffer,
  57                               HB_UInt   glyph_index,
  58                               HB_UShort component,
  59                               HB_UShort ligID );
  60
  61 HB_INTERNAL HB_Error
  62 _hb_buffer_copy_output_glyph ( HB_Buffer buffer );
  63
  64 HB_INTERNAL HB_Error
  65 _hb_buffer_replace_output_glyph ( HB_Buffer buffer,
  66                                   HB_UInt   glyph_index,
  67                                   HB_Bool   inplace );
  68
  69 HB_INTERNAL HB_UShort
  70 _hb_buffer_allocate_ligid( HB_Buffer buffer );
  71
  72
  73 /* convenience macros */
  74
  75 #define IN_GLYPH( pos )        (buffer->in_string[(pos)].gindex)
  76 #define IN_ITEM( pos )         (&buffer->in_string[(pos)])
  77 #define IN_CURGLYPH()          (buffer->in_string[buffer->in_pos].gindex)
  78 #define IN_CURITEM()           (&buffer->in_string[buffer->in_pos])
  79 #define IN_PROPERTIES( pos )   (buffer->in_string[(pos)].properties)
  80 #define IN_LIGID( pos )        (buffer->in_string[(pos)].ligID)
  81 #define IN_COMPONENT( pos )    (buffer->in_string[(pos)].component)
  82 #define POSITION( pos )        (&buffer->positions[(pos)])
  83 #define OUT_GLYPH( pos )       (buffer->out_string[(pos)].gindex)
  84 #define OUT_ITEM( pos )        (&buffer->out_string[(pos)])
  85
  86 #define CHECK_Property( gdef, index, flags, property )                                  \
  87           ( ( error = _HB_GDEF_Check_Property( (gdef), (index), (flags),                \
  88                                       (property) ) ) != HB_Err_Ok )
  89
  90 #define ADD_String( buffer, num_in, num_out, glyph_data, component, ligID )             \
  91           ( ( error = _hb_buffer_add_output_glyphs( (buffer),                            \
  92                                                     (num_in), (num_out),                \
  93                                                     (glyph_data), (component), (ligID)  \
  94                                                   ) ) != HB_Err_Ok )
  95 #define ADD_Glyph( buffer, glyph_index, component, ligID )                              \
  96           ( ( error = _hb_buffer_add_output_glyph( (buffer),                             \
  97                                                     (glyph_index), (component), (ligID) \
  98                                                   ) ) != HB_Err_Ok )
  99 #define REPLACE_Glyph( buffer, glyph_index, nesting_level )                             \
 100           ( ( error = _hb_buffer_replace_output_glyph( (buffer), (glyph_index),         \
 101                                                       (nesting_level) == 1 ) ) != HB_Err_Ok )
 102 #define COPY_Glyph( buffer )                                                            \
 103           ( (error = _hb_buffer_copy_output_glyph ( buffer ) ) != HB_Err_Ok )
 104
 105 HB_END_HEADER
 106
 107 #endif /* HARFBUZZ_BUFFER_PRIVATE_H */