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      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 */
    108