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/*
* Copyright (C) 1998-2004 David Turner and Werner Lemberg
* Copyright (C) 2004,2007,2009 Red Hat, Inc.
*
* This is part of HarfBuzz, an OpenType Layout engine 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"
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_pos;
hb_position_t y_pos;
hb_position_t x_advance;
hb_position_t y_advance;
uint32_t new_advance :1; /* if set, the advance width values are
absolute, i.e., they won't be
added to the original glyph's value
but rather replace them */
uint32_t back : 15; /* 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; used
only internally */
} 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));
struct _hb_buffer_t {
hb_reference_count_t ref_count;
unsigned int allocated;
hb_bool_t have_output; /* weather we have an output buffer going on */
hb_bool_t in_error; /* Allocation failed */
unsigned int in_length;
unsigned int out_length;
unsigned int in_pos;
unsigned int out_pos; /* out_length and out_pos are actually always the same */
hb_internal_glyph_info_t *in_string;
hb_internal_glyph_info_t *out_string;
hb_internal_glyph_position_t *positions;
hb_direction_t direction;
unsigned int max_lig_id;
};
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 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_replace_glyph (hb_buffer_t *buffer,
hb_codepoint_t glyph_index);
HB_INTERNAL unsigned short
_hb_buffer_allocate_lig_id (hb_buffer_t *buffer);
/* convenience macros */
#define IN_GLYPH(pos) (buffer->in_string[(pos)].codepoint)
#define IN_INFO(pos) (&buffer->in_string[(pos)])
#define IN_CURGLYPH() (buffer->in_string[buffer->in_pos].codepoint)
#define IN_CURINFO() (&buffer->in_string[buffer->in_pos])
#define IN_MASK(pos) (buffer->in_string[(pos)].mask)
#define IN_LIGID(pos) (buffer->in_string[(pos)].lig_id)
#define IN_COMPONENT(pos) (buffer->in_string[(pos)].component)
#define POSITION(pos) (&buffer->positions[(pos)])
#define CURPOSITION() (&buffer->positions[buffer->in_pos])
#define OUT_GLYPH(pos) (buffer->out_string[(pos)].codepoint)
#define OUT_INFO(pos) (&buffer->out_string[(pos)])
HB_END_DECLS
#endif /* HB_BUFFER_PRIVATE_H */
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