BASE: start api

src/Makefile.sources

@@ -68,6 +68,7 @@ HB_NODIST_headers = \
 HB_FALLBACK_sources = hb-fallback-shape.cc
 
 HB_OT_sources = \
+	hb-ot-base.cc \
 	hb-ot-font.cc \
 	hb-ot-layout.cc \
 	hb-ot-layout-base-table.hh \
@@ -121,6 +122,7 @@ HB_OT_headers = \
 	hb-ot-font.h \
 	hb-ot-layout.h \
 	hb-ot-math.h \
+	hb-ot-base.h \
 	hb-ot-shape.h \
 	hb-ot-tag.h \
 	hb-ot-var.h \

src/hb-ot-base.cc

@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2017 Elie Roux<elie.roux@telecom-bretagne.eu>
+ *
+ *  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.
+ *
+ */
+
+#include "hb-open-type-private.hh"
+
+#include "hb-ot-layout-private.hh"
+#include "hb-ot-layout-base-table.hh"
+
+static inline const OT::BASE&
+_get_base (hb_face_t *face)
+{
+  if (unlikely (!hb_ot_shaper_face_data_ensure (face))) return OT::Null(OT::BASE);
+  hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
+  return *(layout->base.get ());
+}
+
+/*
+ * OT::BASE
+ */
+
+/**
+ * hb_ot_base_has_data:
+ * @face: #hb_face_t to test
+ *
+ * This function allows to verify the presence of an OpenType BASE table on the
+ * face.
+ *
+ * Return value: true if face has a BASE table, false otherwise
+ *
+ * Since: XXX
+ **/
+hb_bool_t
+hb_ot_base_has_data (hb_face_t *face)
+{
+  return &_get_base (face) != &OT::Null(OT::BASE);
+}

src/hb-ot-base.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright © 2017 Elie Roux<elie.roux@telecom-bretagne.eu>
+ *
+ *  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.
+ *
+ */
+
+#ifndef HB_OT_H_IN
+#error "Include <hb-ot.h> instead."
+#endif
+
+#ifndef HB_OT_BASE_H
+#define HB_OT_BASE_H
+
+#include "hb.h"
+
+HB_BEGIN_DECLS
+
+#define HB_OT_TAG_BASE      HB_TAG('B','A','S','E')
+
+// https://www.microsoft.com/typography/otspec/baselinetags.htm
+
+#define HB_OT_TAG_BASE_HANG HB_TAG('h','a','n','g')
+#define HB_OT_TAG_BASE_ICFB HB_TAG('i','c','f','b')
+#define HB_OT_TAG_BASE_ICFT HB_TAG('i','c','f','t')
+#define HB_OT_TAG_BASE_IDEO HB_TAG('i','d','e','o')
+#define HB_OT_TAG_BASE_IDTB HB_TAG('i','d','t','b')
+#define HB_OT_TAG_BASE_MATH HB_TAG('m','a','t','h')
+#define HB_OT_TAG_BASE_ROMN HB_TAG('r','o','m','n')
+
+/* Methods */
+
+HB_EXTERN hb_bool_t
+hb_ot_base_has_data (hb_face_t *face);
+
+HB_END_DECLS
+
+#endif /* HB_OT_BASE_H */

src/hb-ot-layout-base-table.hh

@@ -28,18 +28,7 @@
 
 #include "hb-open-type-private.hh"
 #include "hb-ot-layout-common-private.hh"
-
-#define HB_OT_TAG_BASE      HB_TAG('B','A','S','E')
-
-// https://www.microsoft.com/typography/otspec/baselinetags.htm
-
-#define HB_OT_TAG_BASE_HANG HB_TAG('h','a','n','g')
-#define HB_OT_TAG_BASE_ICFB HB_TAG('i','c','f','b')
-#define HB_OT_TAG_BASE_ICFT HB_TAG('i','c','f','t')
-#define HB_OT_TAG_BASE_IDEO HB_TAG('i','d','e','o')
-#define HB_OT_TAG_BASE_IDTB HB_TAG('i','d','t','b')
-#define HB_OT_TAG_BASE_MATH HB_TAG('m','a','t','h')
-#define HB_OT_TAG_BASE_ROMN HB_TAG('r','o','m','n')
+#include "hb-ot-base.h"
 
 namespace OT {
 
@@ -743,7 +732,7 @@ struct BASE
   inline SHORT get_vert_min_value (unsigned int baseScriptIndex, unsigned int baseLangSysIndex, unsigned int featureTableTagIndex) const
   { return u.format1_0.get_vert_min_value(baseScriptIndex, baseLangSysIndex, featureTableTagIndex); }
 
-  inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
+  inline bool sanitize (hb_sanitize_context_t *c) const
   {
     TRACE_SANITIZE (this);
     if (!u.version.sanitize (c)) return_trace (false);