harfbuzz/src/hb-buffer-private.hh

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/*
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* Copyright © 1998-2004 David Turner and Werner Lemberg
* Copyright © 2004,2007,2009,2010 Red Hat, 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
*/
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#ifndef HB_BUFFER_PRIVATE_HH
#define HB_BUFFER_PRIVATE_HH
#include "hb-private.hh"
#include "hb-buffer.h"
#include "hb-object-private.hh"
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#include "hb-unicode-private.hh"
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HB_BEGIN_DECLS
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ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
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ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
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typedef struct _hb_segment_properties_t {
hb_direction_t direction;
hb_script_t script;
hb_language_t language;
} hb_segment_properties_t;
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HB_INTERNAL void
_hb_buffer_swap (hb_buffer_t *buffer);
HB_INTERNAL void
_hb_buffer_clear_output (hb_buffer_t *buffer);
HB_INTERNAL void
_hb_buffer_clear_positions (hb_buffer_t *buffer);
HB_INTERNAL void
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_hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer,
unsigned int num_in,
unsigned int num_out,
const uint16_t *glyph_data_be);
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HB_INTERNAL void
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_hb_buffer_replace_glyph (hb_buffer_t *buffer,
hb_codepoint_t glyph_index);
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HB_INTERNAL void
_hb_buffer_next_glyph (hb_buffer_t *buffer);
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HB_INTERNAL void
_hb_buffer_reset_masks (hb_buffer_t *buffer,
hb_mask_t mask);
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HB_INTERNAL void
_hb_buffer_add_masks (hb_buffer_t *buffer,
hb_mask_t mask);
HB_INTERNAL void
_hb_buffer_set_masks (hb_buffer_t *buffer,
hb_mask_t value,
hb_mask_t mask,
unsigned int cluster_start,
unsigned int cluster_end);
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struct _hb_buffer_t {
hb_object_header_t header;
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/* Information about how the text in the buffer should be treated */
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hb_unicode_funcs_t *unicode; /* Unicode functions */
hb_segment_properties_t props; /* Script, language, direction */
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/* Buffer contents */
bool have_output; /* Whether we have an output buffer going on */
bool have_positions; /* Whether we have positions */
bool in_error; /* Allocation failed */
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unsigned int i; /* 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 */
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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;
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/* Methods */
inline unsigned int backtrack_len (void) const
{ return this->have_output? this->out_len : this->i; }
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inline unsigned int next_serial (void) { return serial++; }
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inline void swap (void) { _hb_buffer_swap (this); }
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inline void clear_output (void) { _hb_buffer_clear_output (this); }
inline void clear_positions (void) { _hb_buffer_clear_positions (this); }
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inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
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inline void replace_glyphs_be16 (unsigned int num_in,
unsigned int num_out,
const uint16_t *glyph_data_be)
{ _hb_buffer_replace_glyphs_be16 (this, num_in, num_out, glyph_data_be); }
inline void replace_glyph (hb_codepoint_t glyph_index)
{ _hb_buffer_replace_glyph (this, glyph_index); }
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inline void reset_masks (hb_mask_t mask)
{
for (unsigned int i = 0; i < len; i++)
info[i].mask = mask;
}
inline void add_masks (hb_mask_t mask)
{
for (unsigned int i = 0; i < len; i++)
info[i].mask |= mask;
}
inline void set_masks (hb_mask_t value,
hb_mask_t mask,
unsigned int cluster_start,
unsigned int cluster_end)
{ _hb_buffer_set_masks (this, value, mask, cluster_start, cluster_end); }
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};
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HB_END_DECLS
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#endif /* HB_BUFFER_PRIVATE_HH */