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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_H
#define HB_BUFFER_PRIVATE_H
#include "hb-private.h"
#include "hb-buffer.h"
#include "hb-unicode-private.h"
HB_BEGIN_DECLS
#define HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN 0xFFFF
typedef struct _hb_internal_glyph_info_t {
hb_codepoint_t codepoint;
hb_mask_t mask;
uint32_t cluster;
uint16_t component;
uint16_t lig_id;
uint32_t gproperty;
} hb_internal_glyph_info_t;
typedef struct _hb_internal_glyph_position_t {
hb_position_t x_advance;
hb_position_t y_advance;
hb_position_t x_offset;
hb_position_t y_offset;
uint32_t back : 16; /* number of glyphs to go back
for drawing current glyph */
int32_t cursive_chain : 16; /* character to which this connects,
may be positive or negative */
} hb_internal_glyph_position_t;
ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_internal_glyph_info_t));
ASSERT_STATIC (sizeof (hb_glyph_position_t) == sizeof (hb_internal_glyph_position_t));
ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_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);
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;
hb_direction_t direction;
hb_script_t script;
hb_language_t language;
/* 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_internal_glyph_info_t *info;
hb_internal_glyph_info_t *out_info;
hb_internal_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); }
};
HB_END_DECLS
#endif /* HB_BUFFER_PRIVATE_H */
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