[aat] Implement ankr

src/Makefile.sources

@@ -80,8 +80,9 @@ HB_FALLBACK_sources = \
 HB_OT_sources = \
 	hb-aat-layout.cc \
 	hb-aat-layout-common-private.hh \
-	hb-aat-layout-morx-table.hh \
+	hb-aat-layout-ankr-table.hh \
 	hb-aat-layout-kerx-table.hh \
+	hb-aat-layout-morx-table.hh \
 	hb-aat-layout-trak-table.hh \
 	hb-aat-layout-private.hh \
 	hb-ot-font.cc \

src/hb-aat-layout-ankr-table.hh

@@ -0,0 +1,86 @@
+/*
+ * Copyright © 2018  Ebrahim Byagowi
+ *
+ *  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_AAT_LAYOUT_ANKR_TABLE_HH
+#define HB_AAT_LAYOUT_ANKR_TABLE_HH
+
+#include "hb-aat-layout-common-private.hh"
+
+#define HB_AAT_TAG_ankr HB_TAG('a','n','k','r')
+
+
+namespace AAT {
+
+
+/*
+ * ankr -- Anchor point
+ */
+
+struct GlyphDataTable
+{
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (c->check_struct (this) &&
+      (numPoints == 0) &&
+      (anchorPoints.sanitize (c, numPoints)));
+  }
+
+  protected:
+  HBUINT32			numPoints;	/* Number of anchor points for this glyph */
+  UnsizedArrayOf<HBUINT32>	anchorPoints;	/* Individual anchor points. Each anchor point is a two-byte
+						 * signed x-coordinate followed by a two-byte signed y-coordinate */
+
+  public:
+  DEFINE_SIZE_ARRAY (4, anchorPoints);
+};
+
+struct ankr
+{
+  static const hb_tag_t tableTag = HB_AAT_TAG_ankr;
+
+  inline bool sanitize (hb_sanitize_context_t *c) const
+  {
+    TRACE_SANITIZE (this);
+    return_trace (c->check_struct (this) &&
+      (version == 0) &&
+      (flags == 0) &&
+      (lookupTableOffset == 0x0000000C) &&
+      (glyphDataTableOffset.sanitize (c, this)));
+  }
+
+  protected:
+  HBUINT16			version; 		/* Version number (set to zero) */
+  HBUINT16			flags;			/* Flags (currently unused; set to zero) */
+  LOffsetTo<const void*>	lookupTableOffset;	/* Offset to the table's lookup table */
+  LOffsetTo<GlyphDataTable>	glyphDataTableOffset;	/* Offset to the glyph data table */
+
+  public:
+  DEFINE_SIZE_MIN (12);
+};
+
+} /* namespace AAT */
+
+
+#endif /* HB_AAT_LAYOUT_ANKR_TABLE_HH */

src/hb-aat-layout-kerx-table.hh

@@ -263,7 +263,7 @@ struct kerx
 {
   static const hb_tag_t tableTag = HB_AAT_TAG_kerx;
 
-  inline bool apply (hb_aat_apply_context_t *c) const
+  inline bool apply (hb_aat_apply_context_t *c, const AAT::ankr *ankr) const
   {
     TRACE_APPLY (this);
     /* TODO */

src/hb-aat-layout.cc

@@ -30,29 +30,29 @@
 #include "hb-ot-layout-gsubgpos-private.hh"
 
 #include "hb-aat-layout-private.hh"
-#include "hb-aat-layout-morx-table.hh"
+#include "hb-aat-layout-ankr-table.hh"
 #include "hb-aat-layout-kerx-table.hh"
+#include "hb-aat-layout-morx-table.hh"
 #include "hb-aat-layout-trak-table.hh"
 
 /*
  * mort/morx
  */
 
-static inline const AAT::morx&
+static inline const AAT::ankr&
-_get_morx (hb_face_t *face, hb_blob_t **blob = nullptr)
+_get_ankr (hb_face_t *face, hb_blob_t **blob = nullptr)
 {
   if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
   {
     if (blob)
       *blob = hb_blob_get_empty ();
-    return OT::Null(AAT::morx);
+    return OT::Null(AAT::ankr);
   }
   hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
-  /* XXX this doesn't call set_num_glyphs on sanitizer. */
+  const AAT::ankr& ankr = *(layout->ankr.get ());
-  const AAT::morx& morx = *(layout->morx.get ());
   if (blob)
-    *blob = layout->morx.blob;
+    *blob = layout->ankr.blob;
-  return morx;
+  return ankr;
 }
 
 static inline const AAT::kerx&
@@ -72,6 +72,23 @@ _get_kerx (hb_face_t *face, hb_blob_t **blob = nullptr)
   return kerx;
 }
 
+static inline const AAT::morx&
+_get_morx (hb_face_t *face, hb_blob_t **blob = nullptr)
+{
+  if (unlikely (!hb_ot_shaper_face_data_ensure (face)))
+  {
+    if (blob)
+      *blob = hb_blob_get_empty ();
+    return OT::Null(AAT::morx);
+  }
+  hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
+  /* XXX this doesn't call set_num_glyphs on sanitizer. */
+  const AAT::morx& morx = *(layout->morx.get ());
+  if (blob)
+    *blob = layout->morx.blob;
+  return morx;
+}
+
 static inline const AAT::trak&
 _get_trak (hb_face_t *face, hb_blob_t **blob = nullptr)
 {
@@ -82,7 +99,6 @@ _get_trak (hb_face_t *face, hb_blob_t **blob = nullptr)
     return OT::Null(AAT::trak);
   }
   hb_ot_layout_t * layout = hb_ot_layout_from_face (face);
-  /* XXX this doesn't call set_num_glyphs on sanitizer. */
   const AAT::trak& trak = *(layout->trak.get ());
   if (blob)
     *blob = layout->trak.blob;
@@ -117,10 +133,11 @@ void
 hb_aat_layout_position (hb_font_t *font, hb_buffer_t *buffer)
 {
   hb_blob_t *blob;
+  const AAT::ankr& ankr = _get_ankr (font->face, &blob);
   const AAT::kerx& kerx = _get_kerx (font->face, &blob);
   const AAT::trak& trak = _get_trak (font->face, &blob);
 
   AAT::hb_aat_apply_context_t c (font, buffer, blob);
-  kerx.apply (&c);
+  kerx.apply (&c, &ankr);
   trak.apply (&c);
 }

src/hb-ot-layout-private.hh

@@ -131,8 +131,9 @@ namespace OT {
 }
 
 namespace AAT {
-  struct morx;
+  struct ankr;
   struct kerx;
+  struct morx;
   struct trak;
 }
 
@@ -171,8 +172,9 @@ struct hb_ot_layout_t
   OT::hb_lazy_table_loader_t<struct OT::MATH> math;
   OT::hb_lazy_table_loader_t<struct OT::fvar> fvar;
   OT::hb_lazy_table_loader_t<struct OT::avar> avar;
-  OT::hb_lazy_table_loader_t<struct AAT::morx> morx;
+  OT::hb_lazy_table_loader_t<struct AAT::ankr> ankr;
   OT::hb_lazy_table_loader_t<struct AAT::kerx> kerx;
+  OT::hb_lazy_table_loader_t<struct AAT::morx> morx;
   OT::hb_lazy_table_loader_t<struct AAT::trak> trak;
 
   unsigned int gsub_lookup_count;

src/hb-ot-layout.cc

@@ -64,8 +64,9 @@ _hb_ot_layout_create (hb_face_t *face)
   layout->math.init (face);
   layout->fvar.init (face);
   layout->avar.init (face);
-  layout->morx.init (face);
+  layout->ankr.init (face);
   layout->kerx.init (face);
+  layout->morx.init (face);
   layout->trak.init (face);
 
   {
@@ -216,8 +217,9 @@ _hb_ot_layout_destroy (hb_ot_layout_t *layout)
   layout->math.fini ();
   layout->fvar.fini ();
   layout->avar.fini ();
-  layout->morx.fini ();
+  layout->ankr.fini ();
   layout->kerx.fini ();
+  layout->morx.fini ();
   layout->trak.fini ();
 
   free (layout);