X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Fhb-buffer-private.hh;h=8f2095a10e6890bc49049b6a5a5cf7d7f637073a;hb=8f0b64fb6988f9502d2c5e39768a9af133d9a83f;hp=fa5ac554fcd39ced704073b9c20ff87183c5a387;hpb=d784da1923ff2ca093f8b0210449731d376b7513;p=framework%2Fuifw%2Fharfbuzz.git diff --git a/src/hb-buffer-private.hh b/src/hb-buffer-private.hh index fa5ac55..8f2095a 100644 --- a/src/hb-buffer-private.hh +++ b/src/hb-buffer-private.hh @@ -1,8 +1,9 @@ /* - * Copyright (C) 1998-2004 David Turner and Werner Lemberg - * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc. + * 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. + * 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 @@ -23,141 +24,129 @@ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Red Hat Author(s): Owen Taylor, Behdad Esfahbod + * Google Author(s): Behdad Esfahbod */ -#ifndef HB_BUFFER_PRIVATE_H -#define HB_BUFFER_PRIVATE_H +#ifndef HB_BUFFER_PRIVATE_HH +#define HB_BUFFER_PRIVATE_HH -#include "hb-private.h" +#include "hb-private.hh" #include "hb-buffer.h" -#include "hb-unicode-private.h" +#include "hb-object-private.hh" +#include "hb-unicode-private.hh" 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); +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_reference_count_t ref_count; + hb_object_header_t header; /* 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 */ + hb_unicode_funcs_t *unicode; /* Unicode functions */ + hb_segment_properties_t props; /* Script, language, direction */ - unsigned int allocated; + /* Buffer contents */ - hb_bool_t have_output; /* whether we have an output buffer going on */ - hb_bool_t have_positions; /* whether we have positions */ - 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 */ + bool in_error; /* Allocation failed */ + bool have_output; /* Whether we have an output buffer going on */ + bool have_positions; /* Whether we have positions */ - hb_internal_glyph_info_t *in_string; - hb_internal_glyph_info_t *out_string; - hb_internal_glyph_position_t *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 */ - /* Other stuff */ + unsigned int allocated; /* Length of allocated arrays */ + hb_glyph_info_t *info; + hb_glyph_info_t *out_info; + hb_glyph_position_t *pos; - unsigned int max_lig_id; + unsigned int serial; + uint8_t allocated_var_bytes[8]; + const char *allocated_var_owner[8]; /* 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_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 allocate_var (unsigned int byte_i, unsigned int count, const char *owner); + HB_INTERNAL void deallocate_var (unsigned int byte_i, unsigned int count, const char *owner); + HB_INTERNAL void deallocate_var_all (void); + + 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); +}; -#ifndef BUFFER -#define BUFFER buffer -#endif +#define HB_BUFFER_XALLOCATE_VAR(b, func, var, owner) \ + b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \ + sizeof (b->info[0].var), owner) +#define HB_BUFFER_ALLOCATE_VAR(b, var) \ + HB_BUFFER_XALLOCATE_VAR (b, allocate_var, var (), #var) +#define HB_BUFFER_DEALLOCATE_VAR(b, var) \ + HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var (), #var) -/* convenience macros */ -#define IN_CURGLYPH() (BUFFER->in_string[BUFFER->in_pos].codepoint) HB_END_DECLS -#endif /* HB_BUFFER_PRIVATE_H */ +#endif /* HB_BUFFER_PRIVATE_HH */