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

third_party/harfbuzz-ng/src/hb-ot-layout-private.hh

+/*
+ * Copyright (C) 2007,2008,2009  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): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_LAYOUT_PRIVATE_HH
+#define HB_OT_LAYOUT_PRIVATE_HH
+
+#include "hb-private.h"
+
+#include "hb-ot-layout.h"
+#include "hb-ot-head-private.hh"
+
+#include "hb-font-private.h"
+#include "hb-buffer-private.hh"
+
+HB_BEGIN_DECLS
+
+
+/* buffer var allocations */
+#define props_cache() var1.u16[1] /* glyph_props cache */
+
+
+/* XXX cleanup */
+typedef enum {
+  HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED = 0x0001,
+  HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH   = 0x0002,
+  HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE     = 0x0004,
+  HB_OT_LAYOUT_GLYPH_CLASS_MARK         = 0x0008,
+  HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT    = 0x0010
+} hb_ot_layout_glyph_class_t;
+
+
+/*
+ * hb_ot_layout_t
+ */
+
+struct hb_ot_layout_t
+{
+  hb_blob_t *gdef_blob;
+  hb_blob_t *gsub_blob;
+  hb_blob_t *gpos_blob;
+
+  const struct GDEF *gdef;
+  const struct GSUB *gsub;
+  const struct GPOS *gpos;
+};
+
+struct hb_ot_layout_context_t
+{
+  hb_face_t *face;
+  hb_font_t *font;
+
+  /* Convert from font-space to user-space */
+  inline hb_position_t scale_x (int16_t v) { return scale (v, this->font->x_scale); }
+  inline hb_position_t scale_y (int16_t v) { return scale (v, this->font->y_scale); }
+
+  private:
+  inline hb_position_t scale (int16_t v, unsigned int scale) { return v * (int64_t) scale / this->face->head_table->get_upem (); }
+};
+
+
+HB_INTERNAL hb_ot_layout_t *
+_hb_ot_layout_new (hb_face_t *face);
+
+HB_INTERNAL void
+_hb_ot_layout_free (hb_ot_layout_t *layout);
+
+
+/*
+ * GDEF
+ */
+
+HB_INTERNAL unsigned int
+_hb_ot_layout_get_glyph_property (hb_face_t       *face,
+                                  hb_glyph_info_t *info);
+
+HB_INTERNAL hb_bool_t
+_hb_ot_layout_check_glyph_property (hb_face_t    *face,
+                                    hb_glyph_info_t *ginfo,
+                                    unsigned int  lookup_props,
+                                    unsigned int *property_out);
+
+HB_INTERNAL hb_bool_t
+_hb_ot_layout_skip_mark (hb_face_t    *face,
+                         hb_glyph_info_t *ginfo,
+                         unsigned int  lookup_props,
+                         unsigned int *property_out);
+
+
+HB_END_DECLS
+
+#endif /* HB_OT_LAYOUT_PRIVATE_HH */