138 lines
4.4 KiB
C++
138 lines
4.4 KiB
C++
/*
|
|
* Copyright © 1998-2004 David Turner and Werner Lemberg
|
|
* Copyright © 2004,2007,2009,2010 Red Hat, Inc.
|
|
* Copyright © 2011 Google, Inc.
|
|
*
|
|
* This is part of HarfBuzz, a text shaping library.
|
|
*
|
|
* Permission is hereby granted, without written agreement and without
|
|
* license or royalty fees, to use, copy, modify, and distribute this
|
|
* software and its documentation for any purpose, provided that the
|
|
* above copyright notice and the following two paragraphs appear in
|
|
* all copies of this software.
|
|
*
|
|
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
|
|
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
|
|
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
|
|
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
|
* DAMAGE.
|
|
*
|
|
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
|
|
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
|
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
|
|
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
|
|
*
|
|
* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
|
|
* Google Author(s): Behdad Esfahbod
|
|
*/
|
|
|
|
#ifndef HB_BUFFER_PRIVATE_HH
|
|
#define HB_BUFFER_PRIVATE_HH
|
|
|
|
#include "hb-private.hh"
|
|
#include "hb-buffer.h"
|
|
#include "hb-object-private.hh"
|
|
#include "hb-unicode-private.hh"
|
|
|
|
HB_BEGIN_DECLS
|
|
|
|
|
|
ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
|
|
ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
|
|
|
|
typedef struct _hb_segment_properties_t {
|
|
hb_direction_t direction;
|
|
hb_script_t script;
|
|
hb_language_t language;
|
|
} hb_segment_properties_t;
|
|
|
|
|
|
struct _hb_buffer_t {
|
|
hb_object_header_t header;
|
|
|
|
/* Information about how the text in the buffer should be treated */
|
|
|
|
hb_unicode_funcs_t *unicode; /* Unicode functions */
|
|
hb_segment_properties_t props; /* Script, language, direction */
|
|
|
|
/* Buffer contents */
|
|
|
|
bool in_error; /* Allocation failed */
|
|
bool have_output; /* Whether we have an output buffer going on */
|
|
bool have_positions; /* Whether we have positions */
|
|
|
|
unsigned int idx; /* Cursor into ->info and ->pos arrays */
|
|
unsigned int len; /* Length of ->info and ->pos arrays */
|
|
unsigned int out_len; /* Length of ->out array if have_output */
|
|
|
|
unsigned int serial;
|
|
|
|
unsigned int allocated; /* Length of allocated arrays */
|
|
hb_glyph_info_t *info;
|
|
hb_glyph_info_t *out_info;
|
|
hb_glyph_position_t *pos;
|
|
|
|
|
|
/* Methods */
|
|
|
|
HB_INTERNAL void reset (void);
|
|
|
|
inline unsigned int backtrack_len (void) const
|
|
{ return have_output? out_len : idx; }
|
|
inline unsigned int next_serial (void) { return serial++; }
|
|
|
|
HB_INTERNAL void add (hb_codepoint_t codepoint,
|
|
hb_mask_t mask,
|
|
unsigned int cluster);
|
|
|
|
HB_INTERNAL void reverse_range (unsigned int start, unsigned int end);
|
|
HB_INTERNAL void reverse (void);
|
|
HB_INTERNAL void reverse_clusters (void);
|
|
|
|
HB_INTERNAL void swap_buffers (void);
|
|
HB_INTERNAL void clear_output (void);
|
|
HB_INTERNAL void clear_positions (void);
|
|
HB_INTERNAL void replace_glyphs_be16 (unsigned int num_in,
|
|
unsigned int num_out,
|
|
const uint16_t *glyph_data_be);
|
|
HB_INTERNAL void replace_glyph (hb_codepoint_t glyph_index);
|
|
/* Makes a copy of the glyph at idx to output and replace glyph_index */
|
|
HB_INTERNAL void output_glyph (hb_codepoint_t glyph_index);
|
|
/* Copies glyph at idx to output but doesn't advance idx */
|
|
HB_INTERNAL void copy_glyph (void);
|
|
/* Copies glyph at idx to output and advance idx.
|
|
* If there's no output, just advance idx. */
|
|
HB_INTERNAL void next_glyph (void);
|
|
/* Advance idx without copying to output. */
|
|
inline void skip_glyph (void) { idx++; }
|
|
|
|
inline void reset_masks (hb_mask_t mask)
|
|
{
|
|
for (unsigned int j = 0; j < len; j++)
|
|
info[j].mask = mask;
|
|
}
|
|
inline void add_masks (hb_mask_t mask)
|
|
{
|
|
for (unsigned int j = 0; j < len; j++)
|
|
info[j].mask |= mask;
|
|
}
|
|
HB_INTERNAL void set_masks (hb_mask_t value,
|
|
hb_mask_t mask,
|
|
unsigned int cluster_start,
|
|
unsigned int cluster_end);
|
|
|
|
/* Internal methods */
|
|
HB_INTERNAL bool enlarge (unsigned int size);
|
|
|
|
inline bool ensure (unsigned int size)
|
|
{ return likely (size <= allocated) ? TRUE : enlarge (size); }
|
|
|
|
HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
|
|
};
|
|
|
|
|
|
HB_END_DECLS
|
|
|
|
#endif /* HB_BUFFER_PRIVATE_HH */
|