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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#define HB_BUFFER_MAX_LEN_FACTOR 32
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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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#define HB_BUFFER_MAX_LEN_MIN 8192
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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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#define HB_BUFFER_MAX_OPS_FACTOR 64
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#endif
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#ifndef HB_BUFFER_MAX_OPS_MIN
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#define HB_BUFFER_MAX_OPS_MIN 1024
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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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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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2017-08-12 04:06:07 +02:00
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HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK = 0x00000010u,
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2018-10-02 14:34:29 +02:00
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HB_BUFFER_SCRATCH_FLAG_HAS_CGJ = 0x00000020u,
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2017-08-12 04:06:07 +02:00
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2015-11-06 00:22:18 +01:00
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/* Reserved for complex shapers' internal use. */
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HB_BUFFER_SCRATCH_FLAG_COMPLEX0 = 0x01000000u,
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HB_BUFFER_SCRATCH_FLAG_COMPLEX1 = 0x02000000u,
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HB_BUFFER_SCRATCH_FLAG_COMPLEX2 = 0x04000000u,
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HB_BUFFER_SCRATCH_FLAG_COMPLEX3 = 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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/* Information about how the text in the buffer should be treated */
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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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2018-01-31 14:44:45 +01:00
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hb_buffer_scratch_flags_t scratch_flags; /* Have space-fallback, etc. */
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2015-11-06 08:44:59 +01:00
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unsigned int max_len; /* Maximum allowed len. */
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2017-11-15 06:53:48 +01:00
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int max_ops; /* Maximum allowed operations. */
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2010-05-13 05:34:52 +02:00
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/* Buffer contents */
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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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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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2011-01-06 20:58:52 +01:00
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unsigned int out_len; /* Length of ->out 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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2011-07-25 22:20:16 +02:00
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unsigned int serial;
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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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2016-02-25 04:23:02 +01:00
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/* Debugging API */
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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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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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2016-02-25 04:23:02 +01:00
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/* Internal debugging. */
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2016-02-25 06:40:09 +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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#ifndef HB_NDEBUG
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uint8_t allocated_var_bits;
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#endif
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2017-11-15 06:27:24 +01:00
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/* Methods */
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2018-12-18 19:22:17 +01:00
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bool in_error () const { return !successful; }
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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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#ifndef HB_NDEBUG
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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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#endif
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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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#ifndef HB_NDEBUG
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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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#endif
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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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#ifndef HB_NDEBUG
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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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#endif
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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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#ifndef HB_NDEBUG
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allocated_var_bits = 0;
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2016-02-25 04:23:02 +01:00
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#endif
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2016-02-25 06:40:09 +01:00
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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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2018-12-17 19:01:01 +01:00
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bool has_separate_output () const { return info != out_info; }
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2010-05-13 05:34:52 +02:00
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2011-07-22 17:28:07 +02:00
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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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2018-12-17 19:01:01 +01:00
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unsigned int backtrack_len () const { return have_output? out_len : idx; }
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unsigned int lookahead_len () const { return len - idx; }
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unsigned int next_serial () { return 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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HB_INTERNAL void reverse_range (unsigned int start, unsigned int end);
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2018-12-17 19:01:01 +01:00
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HB_INTERNAL void reverse ();
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HB_INTERNAL void reverse_clusters ();
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HB_INTERNAL void guess_segment_properties ();
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2011-07-22 17:28:07 +02:00
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2018-12-17 19:01:01 +01:00
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HB_INTERNAL void swap_buffers ();
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HB_INTERNAL void remove_output ();
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HB_INTERNAL void clear_output ();
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HB_INTERNAL void clear_positions ();
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2012-07-31 20:51:36 +02:00
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2011-08-26 09:29:42 +02:00
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HB_INTERNAL void replace_glyphs (unsigned int num_in,
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unsigned int num_out,
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2012-04-24 04:18:54 +02:00
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const hb_codepoint_t *glyph_data);
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2012-07-31 20:51:36 +02:00
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2018-12-16 20:08:10 +01:00
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void replace_glyph (hb_codepoint_t glyph_index)
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2018-10-03 20:09:14 +02:00
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{
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if (unlikely (out_info != info || out_len != idx)) {
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if (unlikely (!make_room_for (1, 1))) return;
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out_info[out_len] = info[idx];
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}
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out_info[out_len].codepoint = glyph_index;
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idx++;
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out_len++;
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}
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2011-07-22 17:28:07 +02:00
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/* Makes a copy of the glyph at idx to output and replace glyph_index */
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2018-12-16 20:08:10 +01:00
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hb_glyph_info_t & output_glyph (hb_codepoint_t glyph_index)
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2018-10-03 20:09:14 +02:00
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{
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if (unlikely (!make_room_for (0, 1))) return Crap(hb_glyph_info_t);
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2018-10-15 04:36:46 +02:00
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if (unlikely (idx == len && !out_len))
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return Crap(hb_glyph_info_t);
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out_info[out_len] = idx < len ? info[idx] : out_info[out_len - 1];
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2018-10-03 20:09:14 +02:00
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out_info[out_len].codepoint = glyph_index;
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out_len++;
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return out_info[out_len - 1];
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}
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2018-12-16 20:08:10 +01:00
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void output_info (const hb_glyph_info_t &glyph_info)
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2018-10-03 20:09:14 +02:00
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{
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if (unlikely (!make_room_for (0, 1))) return;
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out_info[out_len] = glyph_info;
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out_len++;
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}
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2011-07-22 17:28:07 +02:00
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/* Copies glyph at idx to output but doesn't advance idx */
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2018-12-17 19:01:01 +01:00
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void copy_glyph ()
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2018-10-03 20:09:14 +02:00
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{
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if (unlikely (!make_room_for (0, 1))) return;
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out_info[out_len] = info[idx];
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out_len++;
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}
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2011-07-22 17:28:07 +02:00
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/* Copies glyph at idx to output and advance idx.
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* If there's no output, just advance idx. */
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2018-12-16 20:08:10 +01:00
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void
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2018-12-17 19:01:01 +01:00
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next_glyph ()
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2012-08-31 22:29:17 +02:00
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{
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if (have_output)
|
|
|
|
{
|
2018-10-09 20:50:57 +02:00
|
|
|
if (out_info != info || out_len != idx)
|
|
|
|
{
|
2015-11-19 20:59:03 +01:00
|
|
|
if (unlikely (!make_room_for (1, 1))) return;
|
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++;
|
|
|
|
}
|
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. */
|
2018-12-16 20:08:10 +01:00
|
|
|
void
|
2018-10-09 20:50:57 +02:00
|
|
|
next_glyphs (unsigned int n)
|
|
|
|
{
|
|
|
|
if (have_output)
|
|
|
|
{
|
|
|
|
if (out_info != info || out_len != idx)
|
|
|
|
{
|
|
|
|
if (unlikely (!make_room_for (n, n))) return;
|
|
|
|
memmove (out_info + out_len, info + idx, n * sizeof (out_info[0]));
|
|
|
|
}
|
|
|
|
out_len += n;
|
|
|
|
}
|
|
|
|
|
|
|
|
idx += n;
|
|
|
|
}
|
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
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
void unsafe_to_break (unsigned int start,
|
2016-05-02 14:47:45 +02:00
|
|
|
unsigned int end)
|
|
|
|
{
|
|
|
|
if (end - start < 2)
|
|
|
|
return;
|
|
|
|
unsafe_to_break_impl (start, end);
|
|
|
|
}
|
|
|
|
HB_INTERNAL void unsafe_to_break_impl (unsigned int start, unsigned int end);
|
|
|
|
HB_INTERNAL void unsafe_to_break_from_outbuffer (unsigned int start, unsigned int end);
|
|
|
|
|
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
/* Internal methods */
|
2018-10-03 20:09:14 +02:00
|
|
|
HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
|
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
HB_INTERNAL bool enlarge (unsigned int size);
|
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
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
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
bool ensure_inplace (unsigned int size)
|
2014-08-11 21:08:19 +02:00
|
|
|
{ return likely (!size || size < allocated); }
|
|
|
|
|
2011-07-22 17:28:07 +02:00
|
|
|
HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
|
2013-10-14 18:51:39 +02:00
|
|
|
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;
|
|
|
|
va_list ap;
|
|
|
|
va_start (ap, fmt);
|
|
|
|
bool ret = message_impl (font, fmt, ap);
|
|
|
|
va_end (ap);
|
|
|
|
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)
|
2017-08-11 05:10:12 +02:00
|
|
|
{
|
|
|
|
if (mask & HB_GLYPH_FLAG_UNSAFE_TO_BREAK)
|
2018-01-11 17:57:46 +01:00
|
|
|
inf.mask |= HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
2017-08-11 05:10:12 +02:00
|
|
|
else
|
2018-01-11 17:57:46 +01:00
|
|
|
inf.mask &= ~HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
2017-08-11 05:10:12 +02:00
|
|
|
}
|
2018-01-11 17:57:46 +01:00
|
|
|
inf.cluster = cluster;
|
2017-08-11 05:10:12 +02:00
|
|
|
}
|
2017-08-12 04:06:07 +02:00
|
|
|
|
2018-12-16 20:08:10 +01:00
|
|
|
int
|
2018-01-11 17:57:46 +01:00
|
|
|
_unsafe_to_break_find_min_cluster (const hb_glyph_info_t *infos,
|
2017-08-12 04:06:07 +02:00
|
|
|
unsigned int start, unsigned int end,
|
|
|
|
unsigned int cluster) const
|
|
|
|
{
|
|
|
|
for (unsigned int i = start; i < end; i++)
|
2019-05-08 05:54:31 +02:00
|
|
|
cluster = hb_min (cluster, infos[i].cluster);
|
2017-08-12 04:06:07 +02:00
|
|
|
return cluster;
|
|
|
|
}
|
2018-12-16 20:08:10 +01:00
|
|
|
void
|
2018-01-11 17:57:46 +01:00
|
|
|
_unsafe_to_break_set_mask (hb_glyph_info_t *infos,
|
2017-08-12 04:06:07 +02:00
|
|
|
unsigned int start, unsigned int end,
|
|
|
|
unsigned int cluster)
|
|
|
|
{
|
|
|
|
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
|
|
|
{
|
|
|
|
scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK;
|
2018-01-11 17:57:46 +01:00
|
|
|
infos[i].mask |= HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
2017-08-12 04:06:07 +02:00
|
|
|
}
|
|
|
|
}
|
2017-11-11 02:14:27 +01:00
|
|
|
|
2019-10-01 12:19:55 +02:00
|
|
|
void unsafe_to_break_all () { unsafe_to_break_impl (0, len); }
|
2018-12-17 19:01:01 +01:00
|
|
|
void safe_to_break_all ()
|
2017-11-11 02:14:27 +01:00
|
|
|
{
|
|
|
|
for (unsigned int i = 0; i < len; i++)
|
|
|
|
info[i].mask &= ~HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
|
|
|
|
}
|
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
|
|
|
|
|
|
|
|
2017-08-12 04:06:07 +02:00
|
|
|
/* Loop over clusters. Duplicated in foreach_syllable(). */
|
|
|
|
#define foreach_cluster(buffer, start, end) \
|
|
|
|
for (unsigned int \
|
|
|
|
_count = buffer->len, \
|
|
|
|
start = 0, end = _count ? _next_cluster (buffer, 0) : 0; \
|
|
|
|
start < _count; \
|
|
|
|
start = end, end = _next_cluster (buffer, start))
|
|
|
|
|
|
|
|
static inline unsigned int
|
|
|
|
_next_cluster (hb_buffer_t *buffer, unsigned int start)
|
|
|
|
{
|
|
|
|
hb_glyph_info_t *info = buffer->info;
|
|
|
|
unsigned int count = buffer->len;
|
|
|
|
|
|
|
|
unsigned int cluster = info[start].cluster;
|
|
|
|
while (++start < count && cluster == info[start].cluster)
|
|
|
|
;
|
|
|
|
|
|
|
|
return start;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
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))
|
|
|
|
#define HB_BUFFER_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, 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 */
|