add harfbuzz library

2026-08-18 11:44:19 +02:00 · 2022-12-26 18:53:21 -04:00
parent 46a2cbb95d
commit 2d13144fcd
517 changed files with 177200 additions and 0 deletions
@@ -0,0 +1,148 @@
+/*
+ * Copyright © 2013  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_BUFFER_DESERIALIZE_TEXT_HH
+#define HB_BUFFER_DESERIALIZE_TEXT_HH
+
+#include "hb.hh"
+
+%%{
+
+machine deserialize_text;
+alphtype unsigned char;
+write data;
+
+action clear_item {
+	memset (&info, 0, sizeof (info));
+	memset (&pos , 0, sizeof (pos ));
+}
+
+action add_item {
+	buffer->add_info (info);
+	if (unlikely (!buffer->successful))
+	  return false;
+	buffer->pos[buffer->len - 1] = pos;
+	*end_ptr = p;
+}
+
+action tok {
+	tok = p;
+}
+
+action ensure_glyphs { if (unlikely (!buffer->ensure_glyphs ())) return false; }
+action ensure_unicode { if (unlikely (!buffer->ensure_unicode ())) return false; }
+
+action parse_glyph {
+	/* TODO Unescape delimiters. */
+	if (!hb_font_glyph_from_string (font,
+					tok, p - tok,
+					&info.codepoint))
+	  return false;
+}
+
+action parse_hexdigits  {if (!parse_hex (tok, p, &info.codepoint )) return false; }
+
+action parse_cluster	{ if (!parse_uint (tok, p, &info.cluster )) return false; }
+action parse_x_offset	{ if (!parse_int  (tok, p, &pos.x_offset )) return false; }
+action parse_y_offset	{ if (!parse_int  (tok, p, &pos.y_offset )) return false; }
+action parse_x_advance	{ if (!parse_int  (tok, p, &pos.x_advance)) return false; }
+action parse_y_advance	{ if (!parse_int  (tok, p, &pos.y_advance)) return false; }
+action parse_glyph_flags{ if (!parse_uint (tok, p, &info.mask    )) return false; }
+
+unum  = '0' | [1-9] digit*;
+num	= '-'? unum;
+
+glyph_id = unum;
+glyph_name = ([^\\\]=@+,|] | '\\' [\\\]=@+,|]) *;
+
+glyph	= (glyph_id | glyph_name) >tok %parse_glyph;
+cluster	= '=' (unum >tok %parse_cluster);
+offsets	= '@' (num >tok %parse_x_offset)   ',' (num >tok %parse_y_offset );
+advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?;
+glyphflags= '#' (unum >tok %parse_glyph_flags);
+
+glyph_item	=
+	(
+		glyph
+		cluster?
+		offsets?
+		advances?
+		glyphflags?
+	)
+	>clear_item
+	@ensure_glyphs
+	%add_item
+	;
+
+unicode = 'U' '+' xdigit+ >tok %parse_hexdigits;
+
+unicode_item	=
+	(
+		unicode
+		cluster?
+	)
+	>clear_item
+	@ensure_unicode
+	%add_item
+	;
+
+glyphs = glyph_item (space* '|' space* glyph_item)* space* ('|'|']')?;
+unicodes = unicode_item (space* '|' space* unicode_item)* space* ('|'|'>')?;
+
+main := space* ( ('[' glyphs) | ('<' unicodes) );
+
+}%%
+
+static hb_bool_t
+_hb_buffer_deserialize_text (hb_buffer_t *buffer,
+				    const char *buf,
+				    unsigned int buf_len,
+				    const char **end_ptr,
+				    hb_font_t *font)
+{
+  const char *p = buf, *pe = buf + buf_len;
+
+  /* Ensure we have positions. */
+  (void) hb_buffer_get_glyph_positions (buffer, nullptr);
+
+  while (p < pe && ISSPACE (*p))
+    p++;
+
+  const char *eof = pe, *tok = nullptr;
+  int cs;
+  hb_glyph_info_t info = {0};
+  hb_glyph_position_t pos = {0};
+  %%{
+    write init;
+    write exec;
+  }%%
+
+  *end_ptr = p;
+
+  return p == pe && *(p-1) != ']';
+}
+
+#endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */