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/*
* Copyright (C) 1998-2004 David Turner and Werner Lemberg
* Copyright (C) 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
*/
#ifndef HB_BUFFER_PRIVATE_HH
#define HB_BUFFER_PRIVATE_HH
#include "hb-private.h"
#include "hb-buffer.h"
#include "hb-unicode-private.h"
HB_BEGIN_DECLS
#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
#define component() var1.u16[0]
#define lig_id() var1.u16[1]
#define gproperty() var2.u32
#define back() var.u16[0] /* number of glyphs to go back for drawing current glyph */
#define cursive_chain() var.i16[1] /* character to which this connects, may be positive or negative */
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;
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_add_output_glyphs (hb_buffer_t *buffer,
unsigned int num_in,
unsigned int num_out,
const hb_codepoint_t *glyph_data,
unsigned short component,
unsigned short ligID);
HB_INTERNAL void
_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer,
unsigned int num_in,
unsigned int num_out,
const uint16_t *glyph_data_be,
unsigned short component,
unsigned short ligID);
HB_INTERNAL void
_hb_buffer_add_output_glyph (hb_buffer_t *buffer,
hb_codepoint_t glyph_index,
unsigned short component,
unsigned short ligID);
HB_INTERNAL void
_hb_buffer_next_glyph (hb_buffer_t *buffer);
HB_INTERNAL void
_hb_buffer_reset_masks (hb_buffer_t *buffer,
hb_mask_t mask);
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);
struct _hb_buffer_t {
hb_reference_count_t ref_count;
/* 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 */
unsigned int allocated; /* Length of allocated arrays */
hb_bool_t have_output; /* Whether we have an output buffer going on */
hb_bool_t have_positions; /* Whether we have positions */
hb_bool_t in_error; /* Allocation failed */
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 */
hb_glyph_info_t *info;
hb_glyph_info_t *out_info;
hb_glyph_position_t *pos;
/* Other stuff */
unsigned int max_lig_id;
/* Methods */
inline unsigned int allocate_lig_id (void) { return max_lig_id++; }
inline void swap (void) { _hb_buffer_swap (this); }
inline void clear_output (void) { _hb_buffer_clear_output (this); }
inline void next_glyph (void) { _hb_buffer_next_glyph (this); }
inline void add_output_glyphs (unsigned int num_in,
unsigned int num_out,
const hb_codepoint_t *glyph_data,
unsigned short component,
unsigned short ligID)
{ _hb_buffer_add_output_glyphs (this, num_in, num_out, glyph_data, component, ligID); }
inline void add_output_glyphs_be16 (unsigned int num_in,
unsigned int num_out,
const uint16_t *glyph_data_be,
unsigned short component,
unsigned short ligID)
{ _hb_buffer_add_output_glyphs_be16 (this, num_in, num_out, glyph_data_be, component, ligID); }
inline void add_output_glyph (hb_codepoint_t glyph_index,
unsigned short component = 0xFFFF,
unsigned short ligID = 0xFFFF)
{ _hb_buffer_add_output_glyph (this, glyph_index, component, ligID); }
inline void replace_glyph (hb_codepoint_t glyph_index) { add_output_glyph (glyph_index); }
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); }
};
HB_END_DECLS
#endif /* HB_BUFFER_PRIVATE_HH */
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