harfbuzz: check in harfbuzz-ng, add gyp define to use it

third_party/harfbuzz-ng/src/hb-buffer.h

Index: third_party/harfbuzz-ng/src/hb-buffer.h
diff --git a/third_party/harfbuzz-ng/src/hb-buffer.h b/third_party/harfbuzz-ng/src/hb-buffer.h
new file mode 100644
index 0000000000000000000000000000000000000000..0185415c46e373856086002900b3e96147934fcc
--- /dev/null
+++ b/third_party/harfbuzz-ng/src/hb-buffer.h
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 1998-2004  David Turner and Werner Lemberg
+ * Copyright (C) 2004,2007,2009  Red Hat, 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.
+ *
+ * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ */
+
+#ifndef HB_BUFFER_H
+#define HB_BUFFER_H
+
+#include "hb-common.h"
+#include "hb-unicode.h"
+#include "hb-language.h"
+
+HB_BEGIN_DECLS
+
+
+typedef struct _hb_buffer_t hb_buffer_t;
+
+typedef struct _hb_glyph_info_t {
+  hb_codepoint_t codepoint;
+  hb_mask_t      mask;
+  uint32_t       cluster;
+  hb_var_int_t   var1;
+  hb_var_int_t   var2;
+} hb_glyph_info_t;
+
+typedef struct _hb_glyph_position_t {
+  hb_position_t  x_advance;
+  hb_position_t  y_advance;
+  hb_position_t  x_offset;
+  hb_position_t  y_offset;
+  hb_var_int_t   var;
+} hb_glyph_position_t;
+
+
+hb_buffer_t *
+hb_buffer_create (unsigned int pre_alloc_size);
+
+hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer);
+
+unsigned int
+hb_buffer_get_reference_count (hb_buffer_t *buffer);
+
+void
+hb_buffer_destroy (hb_buffer_t *buffer);
+
+
+void
+hb_buffer_set_unicode_funcs (hb_buffer_t        *buffer,
+			     hb_unicode_funcs_t *unicode_funcs);
+
+hb_unicode_funcs_t *
+hb_buffer_get_unicode_funcs (hb_buffer_t        *buffer);
+
+void
+hb_buffer_set_direction (hb_buffer_t    *buffer,
+			 hb_direction_t  direction);
+
+hb_direction_t
+hb_buffer_get_direction (hb_buffer_t *buffer);
+
+void
+hb_buffer_set_script (hb_buffer_t *buffer,
+		      hb_script_t  script);
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer);
+
+void
+hb_buffer_set_language (hb_buffer_t   *buffer,
+			hb_language_t  language);
+
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer);
+
+
+void
+hb_buffer_clear (hb_buffer_t *buffer);
+
+void
+hb_buffer_clear_positions (hb_buffer_t *buffer);
+
+hb_bool_t
+hb_buffer_ensure (hb_buffer_t  *buffer,
+		  unsigned int  size);
+
+void
+hb_buffer_reverse (hb_buffer_t *buffer);
+
+void
+hb_buffer_reverse_clusters (hb_buffer_t *buffer);
+
+
+/* Filling the buffer in */
+
+void
+hb_buffer_add_glyph (hb_buffer_t    *buffer,
+		     hb_codepoint_t  codepoint,
+		     hb_mask_t       mask,
+		     unsigned int    cluster);
+
+void
+hb_buffer_add_utf8 (hb_buffer_t  *buffer,
+		    const char   *text,
+		    unsigned int  text_length,
+		    unsigned int  item_offset,
+		    unsigned int  item_length);
+
+void
+hb_buffer_add_utf16 (hb_buffer_t    *buffer,
+		     const uint16_t *text,
+		     unsigned int    text_length,
+		     unsigned int    item_offset,
+		     unsigned int    item_length);
+
+void
+hb_buffer_add_utf32 (hb_buffer_t    *buffer,
+		     const uint32_t *text,
+		     unsigned int    text_length,
+		     unsigned int    item_offset,
+		     unsigned int    item_length);
+
+
+/* Getting glyphs out of the buffer */
+
+/* Return value valid as long as buffer not modified */
+unsigned int
+hb_buffer_get_length (hb_buffer_t *buffer);
+
+/* Return value valid as long as buffer not modified */
+hb_glyph_info_t *
+hb_buffer_get_glyph_infos (hb_buffer_t *buffer);
+
+/* Return value valid as long as buffer not modified */
+hb_glyph_position_t *
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer);
+
+
+HB_END_DECLS
+
+#endif /* HB_BUFFER_H */