2008-01-15 23:46:32 +01:00
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/*
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2011-04-21 23:14:28 +02:00
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* Copyright © 1998-2004 David Turner and Werner Lemberg
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* Copyright © 2004,2007,2009,2010 Red Hat, Inc.
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2012-09-25 23:44:53 +02:00
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* Copyright © 2011,2012 Google, Inc.
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2007-10-11 10:30:50 +02:00
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*
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2011-04-16 00:59:56 +02:00
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* This is part of HarfBuzz, a text shaping library.
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2007-10-11 10:30:50 +02:00
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*
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2008-01-15 23:46:32 +01:00
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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2007-10-11 10:30:50 +02:00
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*
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2008-01-15 23:46:32 +01:00
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
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2011-07-22 17:28:07 +02:00
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* Google Author(s): Behdad Esfahbod
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2007-10-11 10:30:50 +02:00
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*/
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2008-01-15 23:46:32 +01:00
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2018-08-26 07:36:36 +02:00
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#ifndef HB_BUFFER_HH
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#define HB_BUFFER_HH
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2007-10-11 10:30:50 +02:00
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2018-08-26 07:36:36 +02:00
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#include "hb.hh"
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#include "hb-unicode.hh"
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2007-10-11 10:30:50 +02:00
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2017-11-15 06:53:48 +01:00
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#ifndef HB_BUFFER_MAX_LEN_FACTOR
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2020-10-11 20:28:25 +02:00
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#define HB_BUFFER_MAX_LEN_FACTOR 64
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2015-11-06 08:44:59 +01:00
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#endif
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#ifndef HB_BUFFER_MAX_LEN_MIN
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2020-10-11 20:28:25 +02:00
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#define HB_BUFFER_MAX_LEN_MIN 16384
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2015-11-06 08:44:59 +01:00
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#endif
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2015-11-06 18:46:05 +01:00
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#ifndef HB_BUFFER_MAX_LEN_DEFAULT
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2015-11-06 08:44:59 +01:00
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#define HB_BUFFER_MAX_LEN_DEFAULT 0x3FFFFFFF /* Shaping more than a billion chars? Let us know! */
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#endif
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2017-11-15 06:53:48 +01:00
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#ifndef HB_BUFFER_MAX_OPS_FACTOR
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2020-10-11 20:28:25 +02:00
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#define HB_BUFFER_MAX_OPS_FACTOR 1024
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2017-11-15 06:53:48 +01:00
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#endif
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#ifndef HB_BUFFER_MAX_OPS_MIN
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2020-10-11 20:28:25 +02:00
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#define HB_BUFFER_MAX_OPS_MIN 16384
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2017-11-15 06:53:48 +01:00
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#endif
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#ifndef HB_BUFFER_MAX_OPS_DEFAULT
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#define HB_BUFFER_MAX_OPS_DEFAULT 0x1FFFFFFF /* Shaping more than a billion operations? Let us know! */
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#endif
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2018-09-16 19:33:48 +02:00
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static_assert ((sizeof (hb_glyph_info_t) == 20), "");
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static_assert ((sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t)), "");
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2009-08-02 04:53:04 +02:00
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2022-05-31 14:05:57 +02:00
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HB_MARK_AS_FLAG_T (hb_glyph_flags_t);
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2015-11-09 10:17:56 +01:00
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HB_MARK_AS_FLAG_T (hb_buffer_flags_t);
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HB_MARK_AS_FLAG_T (hb_buffer_serialize_flags_t);
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2014-07-20 00:09:09 +02:00
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HB_MARK_AS_FLAG_T (hb_buffer_diff_flags_t);
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2015-11-05 01:25:57 +01:00
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2015-11-05 02:27:07 +01:00
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enum hb_buffer_scratch_flags_t {
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HB_BUFFER_SCRATCH_FLAG_DEFAULT = 0x00000000u,
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2015-11-05 03:58:02 +01:00
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HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII = 0x00000001u,
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HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES = 0x00000002u,
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HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000004u,
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2016-02-11 10:48:13 +01:00
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HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT = 0x00000008u,
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2021-12-05 04:50:33 +01:00
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HB_BUFFER_SCRATCH_FLAG_HAS_CGJ = 0x00000010u,
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HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS = 0x00000020u,
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2022-06-10 15:48:39 +02:00
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HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE = 0x00000040u,
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2017-08-12 04:06:07 +02:00
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2022-06-03 10:50:25 +02:00
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/* Reserved for shapers' internal use. */
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HB_BUFFER_SCRATCH_FLAG_SHAPER0 = 0x01000000u,
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HB_BUFFER_SCRATCH_FLAG_SHAPER1 = 0x02000000u,
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HB_BUFFER_SCRATCH_FLAG_SHAPER2 = 0x04000000u,
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HB_BUFFER_SCRATCH_FLAG_SHAPER3 = 0x08000000u,
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2015-11-05 02:27:07 +01:00
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};
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2015-11-09 10:17:56 +01:00
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HB_MARK_AS_FLAG_T (hb_buffer_scratch_flags_t);
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2015-11-05 02:27:07 +01:00
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2012-07-27 10:02:38 +02:00
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/*
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* hb_buffer_t
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*/
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2009-08-02 04:53:04 +02:00
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2018-08-06 15:17:48 +02:00
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struct hb_buffer_t
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{
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2011-04-22 00:24:02 +02:00
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hb_object_header_t header;
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2010-05-13 05:34:52 +02:00
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2022-01-03 19:45:31 +01:00
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/*
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* Information about how the text in the buffer should be treated.
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*/
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2010-10-09 00:47:47 +02:00
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hb_unicode_funcs_t *unicode; /* Unicode functions */
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2012-11-13 23:42:35 +01:00
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hb_buffer_flags_t flags; /* BOT / EOT / etc. */
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2015-07-22 17:51:12 +02:00
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hb_buffer_cluster_level_t cluster_level;
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2014-07-16 21:34:20 +02:00
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hb_codepoint_t replacement; /* U+FFFD or something else. */
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2018-10-07 18:41:52 +02:00
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hb_codepoint_t invisible; /* 0 or something else. */
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2021-10-26 16:02:29 +02:00
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hb_codepoint_t not_found; /* 0 or something else. */
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2010-05-13 05:34:52 +02:00
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2022-01-03 19:45:31 +01:00
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/*
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* Buffer contents
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*/
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2012-09-07 04:26:16 +02:00
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hb_buffer_content_type_t content_type;
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2014-08-12 00:40:01 +02:00
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hb_segment_properties_t props; /* Script, language, direction */
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2012-09-07 04:26:16 +02:00
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2018-06-01 05:03:00 +02:00
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bool successful; /* Allocations successful */
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2022-05-31 12:25:20 +02:00
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bool shaping_failed; /* Shaping failure */
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2011-04-22 00:24:02 +02:00
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bool have_output; /* Whether we have an output buffer going on */
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bool have_positions; /* Whether we have positions */
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2010-05-15 04:13:38 +02:00
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2011-07-22 17:28:07 +02:00
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unsigned int idx; /* Cursor into ->info and ->pos arrays */
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2010-05-15 04:13:38 +02:00
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unsigned int len; /* Length of ->info and ->pos arrays */
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2021-07-13 01:30:26 +02:00
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unsigned int out_len; /* Length of ->out_info array if have_output */
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2010-05-13 05:34:52 +02:00
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2011-04-16 01:26:24 +02:00
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unsigned int allocated; /* Length of allocated arrays */
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2010-10-27 20:42:15 +02:00
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hb_glyph_info_t *info;
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hb_glyph_info_t *out_info;
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hb_glyph_position_t *pos;
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2010-05-13 05:34:52 +02:00
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2012-09-25 23:44:53 +02:00
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/* Text before / after the main buffer contents.
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* Always in Unicode, and ordered outward.
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* Index 0 is for "pre-context", 1 for "post-context". */
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2019-01-22 12:11:24 +01:00
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static constexpr unsigned CONTEXT_LENGTH = 5u;
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2012-09-25 23:44:53 +02:00
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hb_codepoint_t context[2][CONTEXT_LENGTH];
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unsigned int context_len[2];
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2022-01-04 15:32:04 +01:00
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2022-01-03 19:45:31 +01:00
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/*
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2022-01-04 15:32:04 +01:00
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* Managed by enter / leave
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2022-01-03 19:45:31 +01:00
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*/
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2022-01-04 15:26:53 +01:00
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uint8_t allocated_var_bits;
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uint8_t serial;
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2022-01-03 19:45:31 +01:00
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hb_buffer_scratch_flags_t scratch_flags; /* Have space-fallback, etc. */
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unsigned int max_len; /* Maximum allowed len. */
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int max_ops; /* Maximum allowed operations. */
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2022-01-04 15:26:53 +01:00
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/* The bits here reflect current allocations of the bytes in glyph_info_t's var1 and var2. */
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2022-01-03 19:45:31 +01:00
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2022-01-04 15:32:04 +01:00
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/*
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* Messaging callback
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*/
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2019-06-18 22:29:55 +02:00
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#ifndef HB_NO_BUFFER_MESSAGE
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2015-12-18 19:17:07 +01:00
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hb_buffer_message_func_t message_func;
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void *message_data;
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hb_destroy_func_t message_destroy;
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2021-06-11 01:33:29 +02:00
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unsigned message_depth; /* How deeply are we inside a message callback? */
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#else
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static constexpr unsigned message_depth = 0u;
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2019-10-09 06:00:09 +02:00
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#endif
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2015-12-18 19:17:07 +01:00
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2017-11-15 06:27:24 +01:00
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/* Methods */
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2021-03-15 21:01:32 +01:00
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HB_NODISCARD bool in_error () const { return !successful; }
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2018-12-18 19:22:17 +01:00
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2018-12-16 20:08:10 +01:00
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void allocate_var (unsigned int start, unsigned int count)
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2016-02-25 06:40:09 +01:00
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{
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unsigned int end = start + count;
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assert (end <= 8);
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2016-08-09 02:24:04 +02:00
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unsigned int bits = (1u<<end) - (1u<<start);
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2016-02-25 06:40:09 +01:00
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assert (0 == (allocated_var_bits & bits));
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allocated_var_bits |= bits;
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2022-06-04 14:56:35 +02:00
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}
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bool try_allocate_var (unsigned int start, unsigned int count)
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{
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unsigned int end = start + count;
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assert (end <= 8);
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unsigned int bits = (1u<<end) - (1u<<start);
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if (allocated_var_bits & bits)
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return false;
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allocated_var_bits |= bits;
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return true;
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2016-02-25 06:40:09 +01:00
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}
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2018-12-16 20:08:10 +01:00
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void deallocate_var (unsigned int start, unsigned int count)
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2016-02-25 06:40:09 +01:00
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{
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unsigned int end = start + count;
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assert (end <= 8);
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2016-08-09 02:24:04 +02:00
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unsigned int bits = (1u<<end) - (1u<<start);
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2016-02-25 06:40:09 +01:00
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assert (bits == (allocated_var_bits & bits));
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allocated_var_bits &= ~bits;
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}
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2018-12-16 20:08:10 +01:00
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void assert_var (unsigned int start, unsigned int count)
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2016-02-25 06:40:09 +01:00
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{
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unsigned int end = start + count;
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assert (end <= 8);
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2022-06-05 12:17:05 +02:00
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HB_UNUSED unsigned int bits = (1u<<end) - (1u<<start);
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2016-02-25 06:40:09 +01:00
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assert (bits == (allocated_var_bits & bits));
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}
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2018-12-17 19:01:01 +01:00
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void deallocate_var_all ()
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2016-02-25 06:40:09 +01:00
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{
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allocated_var_bits = 0;
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}
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2016-02-25 04:23:02 +01:00
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2018-12-16 20:08:10 +01:00
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hb_glyph_info_t &cur (unsigned int i = 0) { return info[idx + i]; }
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hb_glyph_info_t cur (unsigned int i = 0) const { return info[idx + i]; }
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2017-11-15 06:27:24 +01:00
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2018-12-16 20:08:10 +01:00
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hb_glyph_position_t &cur_pos (unsigned int i = 0) { return pos[idx + i]; }
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hb_glyph_position_t cur_pos (unsigned int i = 0) const { return pos[idx + i]; }
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2017-11-15 06:27:24 +01:00
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2018-12-17 19:01:01 +01:00
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hb_glyph_info_t &prev () { return out_info[out_len ? out_len - 1 : 0]; }
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hb_glyph_info_t prev () const { return out_info[out_len ? out_len - 1 : 0]; }
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2017-11-15 06:27:24 +01:00
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2022-01-03 19:57:42 +01:00
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HB_INTERNAL void similar (const hb_buffer_t &src);
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2018-12-17 19:01:01 +01:00
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HB_INTERNAL void reset ();
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HB_INTERNAL void clear ();
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2011-07-22 17:28:07 +02:00
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2022-01-04 15:32:04 +01:00
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/* Called around shape() */
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HB_INTERNAL void enter ();
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HB_INTERNAL void leave ();
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2022-01-28 21:45:25 +01:00
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#ifndef HB_NO_BUFFER_VERIFY
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HB_INTERNAL
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#endif
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bool verify (hb_buffer_t *text_buffer,
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hb_font_t *font,
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const hb_feature_t *features,
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unsigned int num_features,
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const char * const *shapers)
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#ifndef HB_NO_BUFFER_VERIFY
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;
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#else
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{ return true; }
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#endif
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2021-07-13 01:35:45 +02:00
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unsigned int backtrack_len () const { return have_output ? out_len : idx; }
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2018-12-17 19:01:01 +01:00
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unsigned int lookahead_len () const { return len - idx; }
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2022-01-04 15:26:53 +01:00
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uint8_t next_serial () { return ++serial ? serial : ++serial; }
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2011-07-22 17:28:07 +02:00
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HB_INTERNAL void add (hb_codepoint_t codepoint,
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unsigned int cluster);
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2013-02-27 23:59:28 +01:00
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HB_INTERNAL void add_info (const hb_glyph_info_t &glyph_info);
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2011-07-22 17:28:07 +02:00
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2021-12-10 20:33:21 +01:00
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void reverse_range (unsigned start, unsigned end)
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{
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hb_array_t<hb_glyph_info_t> (info, len).reverse (start, end);
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if (have_positions)
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hb_array_t<hb_glyph_position_t> (pos, len).reverse (start, end);
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}
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void reverse () { reverse_range (0, len); }
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2021-12-10 20:45:43 +01:00
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template <typename FuncType>
|
2021-12-10 21:02:43 +01:00
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void reverse_groups (const FuncType& group,
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bool merge_clusters = false)
|
2021-12-10 20:45:43 +01:00
|
|
|
{
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|
if (unlikely (!len))
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|
return;
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unsigned start = 0;
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unsigned i;
|
2021-12-10 20:55:29 +01:00
|
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|
for (i = 1; i < len; i++)
|
2021-12-10 20:45:43 +01:00
|
|
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{
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|
if (!group (info[i - 1], info[i]))
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{
|
2021-12-10 21:02:43 +01:00
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|
|
if (merge_clusters)
|
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|
this->merge_clusters (start, i);
|
2021-12-10 20:45:43 +01:00
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|
reverse_range (start, i);
|
|
|
|
start = i;
|
|
|
|
}
|
|
|
|
}
|
2021-12-10 21:02:43 +01:00
|
|
|
if (merge_clusters)
|
|
|
|
this->merge_clusters (start, i);
|
2021-12-10 20:45:43 +01:00
|
|
|
reverse_range (start, i);
|
2021-12-10 22:59:56 +01:00
|
|
|
|
|
|
|
reverse ();
|
2021-12-10 20:45:43 +01:00
|
|
|
}
|
|
|
|
|
2021-12-10 20:55:29 +01:00
|
|
|
template <typename FuncType>
|
|
|
|
unsigned group_end (unsigned start, const FuncType& group) const
|
|
|
|
{
|
|
|
|
while (++start < len && group (info[start - 1], info[start]))
|
|
|
|
;
|
|
|
|
|
|
|
|
return start;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool _cluster_group_func (const hb_glyph_info_t& a,
|
|
|
|
const hb_glyph_info_t& b)
|
|
|
|
{ return a.cluster == b.cluster; }
|
|
|
|
|
|
|
|
void reverse_clusters () { reverse_groups (_cluster_group_func); }
|
2021-12-10 20:45:43 +01:00
|
|
|
|
2018-12-17 19:01:01 +01:00
|
|
|
HB_INTERNAL void guess_segment_properties ();
|
2011-07-22 17:28:07 +02:00
|
|
|
|
2022-01-04 18:52:05 +01:00
|
|
|
HB_INTERNAL void sync ();
|
2018-12-17 19:01:01 +01:00
|
|
|
HB_INTERNAL void clear_output ();
|
|
|
|
HB_INTERNAL void clear_positions ();
|
2012-07-31 20:51:36 +02:00
|
|
|
|
2021-03-15 21:39:06 +01:00
|
|
|
template <typename T>
|
|
|
|
HB_NODISCARD bool replace_glyphs (unsigned int num_in,
|
|
|
|
unsigned int num_out,
|
|
|
|
const T *glyph_data)
|
|
|
|
{
|
|
|
|
if (unlikely (!make_room_for (num_in, num_out))) return false;
|
|
|
|
|
|
|
|
assert (idx + num_in <= len);
|
|
|
|
|
|
|
|
merge_clusters (idx, idx + num_in);
|
|
|
|
|
|
|
|
hb_glyph_info_t &orig_info = idx < len ? cur() : prev();
|
|
|
|
|
|
|
|
hb_glyph_info_t *pinfo = &out_info[out_len];
|
|
|
|
for (unsigned int i = 0; i < num_out; i++)
|
|
|
|
{
|
|
|
|
*pinfo = orig_info;
|
|
|
|
pinfo->codepoint = glyph_data[i];
|
|
|
|
pinfo++;
|
|
|
|
}
|
|
|
|
|
|
|
|
idx += num_in;
|
|
|
|
out_len += num_out;
|
|
|
|
return true;
|
|
|
|
}
|
2012-07-31 20:51:36 +02:00
|
|
|
|
2021-03-15 20:33:44 +01:00
|
|
|
HB_NODISCARD bool replace_glyph (hb_codepoint_t glyph_index)
|
2021-03-15 21:52:19 +01:00
|
|
|
{ return replace_glyphs (1, 1, &glyph_index); }
|
2018-10-03 20:09:14 +02:00
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Makes a copy of the glyph at idx to output and replace glyph_index */
|
2021-03-15 21:39:06 +01:00
|
|
|
HB_NODISCARD bool output_glyph (hb_codepoint_t glyph_index)
|
2021-03-15 21:48:50 +01:00
|
|
|
{ return replace_glyphs (0, 1, &glyph_index); }
|
2018-10-03 20:09:14 +02:00
|
|
|
|
2021-03-15 21:12:10 +01:00
|
|
|
HB_NODISCARD bool output_info (const hb_glyph_info_t &glyph_info)
|
2018-10-03 20:09:14 +02:00
|
|
|
{
|
2021-03-15 20:13:45 +01:00
|
|
|
if (unlikely (!make_room_for (0, 1))) return false;
|
2018-10-03 20:09:14 +02:00
|
|
|
|
|
|
|
out_info[out_len] = glyph_info;
|
|
|
|
|
|
|
|
out_len++;
|
2021-03-15 20:13:45 +01:00
|
|
|
return true;
|
2018-10-03 20:09:14 +02:00
|
|
|
}
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Copies glyph at idx to output but doesn't advance idx */
|
2021-03-15 21:10:39 +01:00
|
|
|
HB_NODISCARD bool copy_glyph ()
|
2018-10-03 20:09:14 +02:00
|
|
|
{
|
2021-03-15 21:54:45 +01:00
|
|
|
/* Extra copy because cur()'s return can be freed within
|
|
|
|
* output_info() call if buffer reallocates. */
|
|
|
|
return output_info (hb_glyph_info_t (cur()));
|
2018-10-03 20:09:14 +02:00
|
|
|
}
|
2021-03-15 21:54:45 +01:00
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Copies glyph at idx to output and advance idx.
|
|
|
|
* If there's no output, just advance idx. */
|
2021-03-15 22:18:06 +01:00
|
|
|
HB_NODISCARD bool next_glyph ()
|
2012-08-31 22:29:17 +02:00
|
|
|
{
|
|
|
|
if (have_output)
|
|
|
|
{
|
2018-10-09 20:50:57 +02:00
|
|
|
if (out_info != info || out_len != idx)
|
|
|
|
{
|
2021-03-15 20:13:45 +01:00
|
|
|
if (unlikely (!make_room_for (1, 1))) return false;
|
2012-08-31 22:29:17 +02:00
|
|
|
out_info[out_len] = info[idx];
|
|
|
|
}
|
|
|
|
out_len++;
|
|
|
|
}
|
2015-11-19 20:50:58 +01:00
|
|
|
|
2012-08-31 22:29:17 +02:00
|
|
|
idx++;
|
2021-03-15 20:13:45 +01:00
|
|
|
return true;
|
2012-08-31 22:29:17 +02:00
|
|
|
}
|
2018-10-09 20:50:57 +02:00
|
|
|
/* Copies n glyphs at idx to output and advance idx.
|
|
|
|
* If there's no output, just advance idx. */
|
2021-03-15 21:08:08 +01:00
|
|
|
HB_NODISCARD bool next_glyphs (unsigned int n)
|
2018-10-09 20:50:57 +02:00
|
|
|
{
|
|
|
|
if (have_output)
|
|
|
|
{
|
|
|
|
if (out_info != info || out_len != idx)
|
|
|
|
{
|
2021-03-15 20:13:45 +01:00
|
|
|
if (unlikely (!make_room_for (n, n))) return false;
|
2018-10-09 20:50:57 +02:00
|
|
|
memmove (out_info + out_len, info + idx, n * sizeof (out_info[0]));
|
|
|
|
}
|
|
|
|
out_len += n;
|
|
|
|
}
|
|
|
|
|
|
|
|
idx += n;
|
2021-03-15 20:13:45 +01:00
|
|
|
return true;
|
2018-10-09 20:50:57 +02:00
|
|
|
}
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Advance idx without copying to output. */
|
2018-12-17 19:01:01 +01:00
|
|
|
void skip_glyph () { idx++; }
|
2018-12-16 20:08:10 +01:00
|
|
|
void reset_masks (hb_mask_t mask)
|
2010-10-14 00:33:16 +02:00
|
|
|
{
|
2011-06-15 15:49:58 +02:00
|
|
|
for (unsigned int j = 0; j < len; j++)
|
|
|
|
info[j].mask = mask;
|
2010-10-14 00:33:16 +02:00
|
|
|
}
|
2018-12-16 20:08:10 +01:00
|
|
|
void add_masks (hb_mask_t mask)
|
2010-10-14 00:33:16 +02:00
|
|
|
{
|
2011-06-15 15:49:58 +02:00
|
|
|
for (unsigned int j = 0; j < len; j++)
|
|
|
|
info[j].mask |= mask;
|
2010-10-14 00:33:16 +02:00
|
|
|
}
|
2016-05-02 14:47:45 +02:00
|
|
|
HB_INTERNAL void set_masks (hb_mask_t value, hb_mask_t mask,
|
|
|
|
unsigned int cluster_start, unsigned int cluster_end);
|
2011-07-22 17:28:07 +02:00
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
void merge_clusters (unsigned int start, unsigned int end)
|
2015-07-22 16:42:20 +02:00
|
|
|
{
|
|
|
|
if (end - start < 2)
|
|
|
|
return;
|
|
|
|
merge_clusters_impl (start, end);
|
|
|
|
}
|
2016-05-02 14:47:45 +02:00
|
|
|
HB_INTERNAL void merge_clusters_impl (unsigned int start, unsigned int end);
|
|
|
|
HB_INTERNAL void merge_out_clusters (unsigned int start, unsigned int end);
|
2015-06-19 22:31:49 +02:00
|
|
|
/* Merge clusters for deleting current glyph, and skip it. */
|
2018-12-17 19:01:01 +01:00
|
|
|
HB_INTERNAL void delete_glyph ();
|
2012-04-08 03:52:28 +02:00
|
|
|
|
2021-12-05 05:43:27 +01:00
|
|
|
|
2022-02-03 18:19:23 +01:00
|
|
|
/* Adds glyph flags in mask to infos with clusters between start and end.
|
|
|
|
* The start index will be from out-buffer if from_out_buffer is true.
|
|
|
|
* If interior is true, then the cluster having the minimum value is skipped. */
|
|
|
|
void _set_glyph_flags (hb_mask_t mask,
|
|
|
|
unsigned start = 0,
|
|
|
|
unsigned end = (unsigned) -1,
|
|
|
|
bool interior = false,
|
|
|
|
bool from_out_buffer = false)
|
2016-05-02 14:47:45 +02:00
|
|
|
{
|
2022-01-22 18:46:18 +01:00
|
|
|
end = hb_min (end, len);
|
2022-01-20 23:51:04 +01:00
|
|
|
|
2021-12-05 05:43:27 +01:00
|
|
|
if (interior && !from_out_buffer && end - start < 2)
|
2016-05-02 14:47:45 +02:00
|
|
|
return;
|
2021-12-05 05:43:27 +01:00
|
|
|
|
|
|
|
scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS;
|
|
|
|
|
|
|
|
if (!from_out_buffer || !have_output)
|
|
|
|
{
|
|
|
|
if (!interior)
|
|
|
|
{
|
|
|
|
for (unsigned i = start; i < end; i++)
|
|
|
|
info[i].mask |= mask;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
unsigned cluster = _infos_find_min_cluster (info, start, end);
|
|
|
|
_infos_set_glyph_flags (info, start, end, cluster, mask);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
assert (start <= out_len);
|
|
|
|
assert (idx <= end);
|
|
|
|
|
|
|
|
if (!interior)
|
|
|
|
{
|
|
|
|
for (unsigned i = start; i < out_len; i++)
|
|
|
|
out_info[i].mask |= mask;
|
|
|
|
for (unsigned i = idx; i < end; i++)
|
|
|
|
info[i].mask |= mask;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
unsigned cluster = _infos_find_min_cluster (info, idx, end);
|
|
|
|
cluster = _infos_find_min_cluster (out_info, start, out_len, cluster);
|
|
|
|
|
|
|
|
_infos_set_glyph_flags (out_info, start, out_len, cluster, mask);
|
|
|
|
_infos_set_glyph_flags (info, idx, end, cluster, mask);
|
|
|
|
}
|
|
|
|
}
|
2016-05-02 14:47:45 +02:00
|
|
|
}
|
2021-12-05 05:43:27 +01:00
|
|
|
|
2022-01-22 19:40:37 +01:00
|
|
|
void unsafe_to_break (unsigned int start = 0, unsigned int end = -1)
|
2021-12-05 04:50:33 +01:00
|
|
|
{
|
2022-02-03 18:19:23 +01:00
|
|
|
_set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_BREAK | HB_GLYPH_FLAG_UNSAFE_TO_CONCAT,
|
|
|
|
start, end,
|
|
|
|
true);
|
2021-12-05 05:43:27 +01:00
|
|
|
}
|
2022-01-22 19:40:37 +01:00
|
|
|
void unsafe_to_concat (unsigned int start = 0, unsigned int end = -1)
|
2021-12-05 05:43:27 +01:00
|
|
|
{
|
2022-02-18 21:08:43 +01:00
|
|
|
if (likely ((flags & HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT) == 0))
|
|
|
|
return;
|
2022-02-03 18:19:23 +01:00
|
|
|
_set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_CONCAT,
|
|
|
|
start, end,
|
|
|
|
true);
|
2021-12-05 05:43:27 +01:00
|
|
|
}
|
2022-01-22 19:40:37 +01:00
|
|
|
void unsafe_to_break_from_outbuffer (unsigned int start = 0, unsigned int end = -1)
|
2021-12-05 05:43:27 +01:00
|
|
|
{
|
2022-02-03 18:19:23 +01:00
|
|
|
_set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_BREAK | HB_GLYPH_FLAG_UNSAFE_TO_CONCAT,
|
|
|
|
start, end,
|
|
|
|
true, true);
|
2021-12-05 04:50:33 +01:00
|
|
|
}
|
2022-01-22 19:40:37 +01:00
|
|
|
void unsafe_to_concat_from_outbuffer (unsigned int start = 0, unsigned int end = -1)
|
2021-12-05 05:43:27 +01:00
|
|
|
{
|
2022-02-18 21:08:43 +01:00
|
|
|
if (likely ((flags & HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT) == 0))
|
|
|
|
return;
|
2022-02-03 18:19:23 +01:00
|
|
|
_set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_CONCAT,
|
|
|
|
start, end,
|
|
|
|
false, true);
|
2021-12-05 05:43:27 +01:00
|
|
|
}
|
2016-05-02 14:47:45 +02:00
|
|
|
|
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Internal methods */
|
2021-03-15 23:50:54 +01:00
|
|
|
HB_NODISCARD HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
|
2018-10-03 20:09:14 +02:00
|
|
|
|
2021-03-15 23:50:54 +01:00
|
|
|
HB_NODISCARD HB_INTERNAL bool enlarge (unsigned int size);
|
2011-07-22 17:28:07 +02:00
|
|
|
|
2021-03-15 20:43:29 +01:00
|
|
|
HB_NODISCARD bool ensure (unsigned int size)
|
2013-11-15 19:05:38 +01:00
|
|
|
{ return likely (!size || size < allocated) ? true : enlarge (size); }
|
2011-07-22 17:28:07 +02:00
|
|
|
|
2021-03-15 20:57:18 +01:00
|
|
|
HB_NODISCARD bool ensure_inplace (unsigned int size)
|
2014-08-11 21:08:19 +02:00
|
|
|
{ return likely (!size || size < allocated); }
|
|
|
|
|
2020-10-15 10:02:04 +02:00
|
|
|
void assert_glyphs ()
|
|
|
|
{
|
|
|
|
assert ((content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS) ||
|
|
|
|
(!len && (content_type == HB_BUFFER_CONTENT_TYPE_INVALID)));
|
|
|
|
}
|
|
|
|
void assert_unicode ()
|
|
|
|
{
|
|
|
|
assert ((content_type == HB_BUFFER_CONTENT_TYPE_UNICODE) ||
|
|
|
|
(!len && (content_type == HB_BUFFER_CONTENT_TYPE_INVALID)));
|
|
|
|
}
|
2021-03-15 20:58:30 +01:00
|
|
|
HB_NODISCARD bool ensure_glyphs ()
|
2020-10-15 09:54:28 +02:00
|
|
|
{
|
|
|
|
if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_GLYPHS))
|
|
|
|
{
|
|
|
|
if (content_type != HB_BUFFER_CONTENT_TYPE_INVALID)
|
|
|
|
return false;
|
|
|
|
assert (len == 0);
|
|
|
|
content_type = HB_BUFFER_CONTENT_TYPE_GLYPHS;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
2021-03-15 20:58:30 +01:00
|
|
|
HB_NODISCARD bool ensure_unicode ()
|
2020-10-15 09:54:28 +02:00
|
|
|
{
|
|
|
|
if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_UNICODE))
|
|
|
|
{
|
|
|
|
if (content_type != HB_BUFFER_CONTENT_TYPE_INVALID)
|
|
|
|
return false;
|
|
|
|
assert (len == 0);
|
|
|
|
content_type = HB_BUFFER_CONTENT_TYPE_UNICODE;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2021-03-15 23:50:54 +01:00
|
|
|
HB_NODISCARD HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
|
|
|
|
HB_NODISCARD HB_INTERNAL bool shift_forward (unsigned int count);
|
2011-08-03 23:38:54 +02:00
|
|
|
|
2013-11-13 20:50:25 +01:00
|
|
|
typedef long scratch_buffer_t;
|
2013-11-13 20:44:01 +01:00
|
|
|
HB_INTERNAL scratch_buffer_t *get_scratch_buffer (unsigned int *size);
|
2012-09-25 23:44:53 +02:00
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
void clear_context (unsigned int side) { context_len[side] = 0; }
|
2015-09-01 17:13:32 +02:00
|
|
|
|
|
|
|
HB_INTERNAL void sort (unsigned int start, unsigned int end, int(*compar)(const hb_glyph_info_t *, const hb_glyph_info_t *));
|
2015-12-18 19:17:07 +01:00
|
|
|
|
2019-06-05 21:13:49 +02:00
|
|
|
bool messaging ()
|
|
|
|
{
|
|
|
|
#ifdef HB_NO_BUFFER_MESSAGE
|
|
|
|
return false;
|
2019-06-18 22:29:55 +02:00
|
|
|
#else
|
2019-06-05 21:13:49 +02:00
|
|
|
return unlikely (message_func);
|
2019-06-18 22:29:55 +02:00
|
|
|
#endif
|
2019-06-05 21:13:49 +02:00
|
|
|
}
|
2018-12-16 20:08:10 +01:00
|
|
|
bool message (hb_font_t *font, const char *fmt, ...) HB_PRINTF_FUNC(3, 4)
|
2015-12-18 19:17:07 +01:00
|
|
|
{
|
2019-06-20 23:24:43 +02:00
|
|
|
#ifdef HB_NO_BUFFER_MESSAGE
|
|
|
|
return true;
|
|
|
|
#else
|
2015-12-18 19:17:07 +01:00
|
|
|
if (!messaging ())
|
|
|
|
return true;
|
2021-06-11 01:33:29 +02:00
|
|
|
|
|
|
|
message_depth++;
|
|
|
|
|
2015-12-18 19:17:07 +01:00
|
|
|
va_list ap;
|
|
|
|
va_start (ap, fmt);
|
|
|
|
bool ret = message_impl (font, fmt, ap);
|
|
|
|
va_end (ap);
|
2021-06-11 01:33:29 +02:00
|
|
|
|
|
|
|
message_depth--;
|
|
|
|
|
2015-12-18 19:17:07 +01:00
|
|
|
return ret;
|
2019-06-20 23:24:43 +02:00
|
|
|
#endif
|
2015-12-18 19:17:07 +01:00
|
|
|
}
|
|
|
|
HB_INTERNAL bool message_impl (hb_font_t *font, const char *fmt, va_list ap) HB_PRINTF_FUNC(3, 0);
|
2017-08-11 05:10:12 +02:00
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
static void
|
2018-01-11 17:57:46 +01:00
|
|
|
set_cluster (hb_glyph_info_t &inf, unsigned int cluster, unsigned int mask = 0)
|
2017-08-11 05:10:12 +02:00
|
|
|
{
|
2018-01-11 17:57:46 +01:00
|
|
|
if (inf.cluster != cluster)
|
2021-12-05 04:50:33 +01:00
|
|
|
inf.mask = (inf.mask & ~HB_GLYPH_FLAG_DEFINED) | (mask & HB_GLYPH_FLAG_DEFINED);
|
2018-01-11 17:57:46 +01:00
|
|
|
inf.cluster = cluster;
|
2017-08-11 05:10:12 +02:00
|
|
|
}
|
2018-12-16 20:08:10 +01:00
|
|
|
void
|
2021-12-05 04:59:55 +01:00
|
|
|
_infos_set_glyph_flags (hb_glyph_info_t *infos,
|
|
|
|
unsigned int start, unsigned int end,
|
|
|
|
unsigned int cluster,
|
|
|
|
hb_mask_t mask)
|
2017-08-12 04:06:07 +02:00
|
|
|
{
|
|
|
|
for (unsigned int i = start; i < end; i++)
|
2018-01-11 17:57:46 +01:00
|
|
|
if (cluster != infos[i].cluster)
|
2017-08-12 04:06:07 +02:00
|
|
|
{
|
2021-12-05 04:50:33 +01:00
|
|
|
scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS;
|
|
|
|
infos[i].mask |= mask;
|
2017-08-12 04:06:07 +02:00
|
|
|
}
|
|
|
|
}
|
2021-12-05 04:59:55 +01:00
|
|
|
static unsigned
|
|
|
|
_infos_find_min_cluster (const hb_glyph_info_t *infos,
|
|
|
|
unsigned start, unsigned end,
|
2021-12-05 05:07:05 +01:00
|
|
|
unsigned cluster = UINT_MAX)
|
2021-12-05 04:59:55 +01:00
|
|
|
{
|
|
|
|
for (unsigned int i = start; i < end; i++)
|
|
|
|
cluster = hb_min (cluster, infos[i].cluster);
|
|
|
|
return cluster;
|
|
|
|
}
|
2017-11-11 02:14:27 +01:00
|
|
|
|
2021-12-05 01:56:39 +01:00
|
|
|
void clear_glyph_flags (hb_mask_t mask = 0)
|
2017-11-11 02:14:27 +01:00
|
|
|
{
|
|
|
|
for (unsigned int i = 0; i < len; i++)
|
2021-12-05 01:56:39 +01:00
|
|
|
info[i].mask = (info[i].mask & ~HB_GLYPH_FLAG_DEFINED) | (mask & HB_GLYPH_FLAG_DEFINED);
|
2017-11-11 02:14:27 +01:00
|
|
|
}
|
2010-05-13 05:34:52 +02:00
|
|
|
};
|
2018-08-06 15:17:48 +02:00
|
|
|
DECLARE_NULL_INSTANCE (hb_buffer_t);
|
2010-05-13 05:34:52 +02:00
|
|
|
|
|
|
|
|
2021-12-10 20:55:29 +01:00
|
|
|
#define foreach_group(buffer, start, end, group_func) \
|
2017-08-12 04:06:07 +02:00
|
|
|
for (unsigned int \
|
|
|
|
_count = buffer->len, \
|
2021-12-10 20:55:29 +01:00
|
|
|
start = 0, end = _count ? buffer->group_end (0, group_func) : 0; \
|
2017-08-12 04:06:07 +02:00
|
|
|
start < _count; \
|
2021-12-10 20:55:29 +01:00
|
|
|
start = end, end = buffer->group_end (start, group_func))
|
2017-08-12 04:06:07 +02:00
|
|
|
|
2021-12-10 20:55:29 +01:00
|
|
|
#define foreach_cluster(buffer, start, end) \
|
|
|
|
foreach_group (buffer, start, end, hb_buffer_t::_cluster_group_func)
|
2017-08-12 04:06:07 +02:00
|
|
|
|
|
|
|
|
2016-02-25 06:40:09 +01:00
|
|
|
#define HB_BUFFER_XALLOCATE_VAR(b, func, var) \
|
2011-07-28 22:48:43 +02:00
|
|
|
b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \
|
2016-02-25 06:40:09 +01:00
|
|
|
sizeof (b->info[0].var))
|
2022-06-04 14:56:35 +02:00
|
|
|
#define HB_BUFFER_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, allocate_var, var ())
|
|
|
|
#define HB_BUFFER_TRY_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, try_allocate_var, var ())
|
|
|
|
#define HB_BUFFER_DEALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var ())
|
|
|
|
#define HB_BUFFER_ASSERT_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, assert_var, var ())
|
2011-07-28 22:48:43 +02:00
|
|
|
|
|
|
|
|
2018-08-26 07:36:36 +02:00
|
|
|
#endif /* HB_BUFFER_HH */
|