Start fleshing out builtin font functions

src/Makefile.am

@@ -51,7 +51,6 @@ HBSOURCES =  \
 	hb-shaper-impl-private.hh \
 	hb-shaper-private.hh \
 	hb-shaper.cc \
-	hb-tt-font.cc \
 	hb-unicode-private.hh \
 	hb-unicode.cc \
 	hb-utf-private.hh \
@@ -76,6 +75,7 @@ HBNODISTHEADERS = \
 
 if HAVE_OT
 HBSOURCES += \
+	hb-ot-font.cc \
 	hb-ot-layout.cc \
 	hb-ot-layout-common-private.hh \
 	hb-ot-layout-gdef-table.hh \
@@ -112,6 +112,7 @@ HBSOURCES += \
 	$(NULL)
 HBHEADERS += \
 	hb-ot.h \
+	hb-ot-font.h \
 	hb-ot-layout.h \
 	hb-ot-shape.h \
 	hb-ot-tag.h \

src/hb-glib.cc

@@ -340,7 +340,7 @@ hb_glib_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 					 void               *user_data HB_UNUSED)
 {
 #if GLIB_CHECK_VERSION(2,29,12)
-  return g_unichar_fully_decompose (u, TRUE, decomposed, HB_UNICODE_MAX_DECOMPOSITION_LEN);
+  return g_unichar_fully_decompose (u, true, decomposed, HB_UNICODE_MAX_DECOMPOSITION_LEN);
 #endif
 
   /* If the user doesn't have GLib >= 2.29.12 we have to perform

src/hb-icu.cc

@@ -323,7 +323,7 @@ hb_icu_unicode_decompose_compatibility (hb_unicode_funcs_t *ufuncs HB_UNUSED,
 
   /* Copy @u into a UTF-16 array to be passed to ICU. */
   len = 0;
-  err = FALSE;
+  err = false;
   U16_APPEND (utf16, len, ARRAY_LENGTH (utf16), u, err);
   if (err)
     return 0;

src/hb-ot-font.cc

@@ -0,0 +1,260 @@
+/*
+ * Copyright © 2011,2014  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, Roozbeh Pournader
+ */
+
+#include "hb-private.hh"
+
+#include "hb-ot.h"
+
+#include "hb-font-private.hh"
+
+#include "hb-ot-hhea-table.hh"
+#include "hb-ot-hmtx-table.hh"
+
+
+
+struct hb_ot_font_t
+{
+  unsigned int num_glyphs;
+  unsigned int num_hmetrics;
+  const OT::hmtx *hmtx;
+  hb_blob_t *hmtx_blob;
+};
+
+
+static hb_ot_font_t *
+_hb_ot_font_create (hb_font_t *font)
+{
+  hb_ot_font_t *ot_font = (hb_ot_font_t *) calloc (1, sizeof (hb_ot_font_t));
+
+  if (unlikely (!ot_font))
+    return NULL;
+
+  ot_font->num_glyphs = font->face->get_num_glyphs ();
+
+  {
+    hb_blob_t *hhea_blob = OT::Sanitizer<OT::hhea>::sanitize (font->face->reference_table (HB_OT_TAG_hhea));
+    const OT::hhea *hhea = OT::Sanitizer<OT::hhea>::lock_instance (hhea_blob);
+    ot_font->num_hmetrics = hhea->numberOfHMetrics;
+    hb_blob_destroy (hhea_blob);
+  }
+  ot_font->hmtx_blob = OT::Sanitizer<OT::hmtx>::sanitize (font->face->reference_table (HB_OT_TAG_hmtx));
+  if (unlikely (!ot_font->num_hmetrics ||
+		2 * (ot_font->num_hmetrics + ot_font->num_glyphs) < hb_blob_get_length (ot_font->hmtx_blob)))
+  {
+    hb_blob_destroy (ot_font->hmtx_blob);
+    free (ot_font);
+    return NULL;
+  }
+
+  ot_font->hmtx = OT::Sanitizer<OT::hmtx>::lock_instance (ot_font->hmtx_blob);
+
+  return ot_font;
+}
+
+static void
+_hb_ot_font_destroy (hb_ot_font_t *ot_font)
+{
+  hb_blob_destroy (ot_font->hmtx_blob);
+
+  free (ot_font);
+}
+
+
+static hb_bool_t
+hb_ot_get_glyph (hb_font_t *font HB_UNUSED,
+		 void *font_data,
+		 hb_codepoint_t unicode,
+		 hb_codepoint_t variation_selector,
+		 hb_codepoint_t *glyph,
+		 void *user_data HB_UNUSED)
+
+{
+#if 0
+  FT_Face ft_face = (FT_Face) font_data;
+
+#ifdef HAVE_FT_FACE_GETCHARVARIANTINDEX
+  if (unlikely (variation_selector)) {
+    *glyph = FT_Face_GetCharVariantIndex (ft_face, unicode, variation_selector);
+    return *glyph != 0;
+  }
+#endif
+
+  *glyph = FT_Get_Char_Index (ft_face, unicode);
+  return *glyph != 0;
+#endif
+  return true;
+}
+
+static hb_position_t
+hb_ot_get_glyph_h_advance (hb_font_t *font,
+			   void *font_data,
+			   hb_codepoint_t glyph,
+			   void *user_data HB_UNUSED)
+{
+  const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
+
+  if (unlikely (glyph >= ot_font->num_glyphs))
+    return 0; /* Maybe better to return notdef's advance instead? */
+
+  if (glyph >= ot_font->num_hmetrics)
+    glyph = ot_font->num_hmetrics - 1;
+
+  return font->em_scale_x (ot_font->hmtx->longHorMetric[glyph].advanceWidth);
+}
+
+static hb_position_t
+hb_ot_get_glyph_v_advance (hb_font_t *font HB_UNUSED,
+			   void *font_data,
+			   hb_codepoint_t glyph,
+			   void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return 0;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_h_origin (hb_font_t *font HB_UNUSED,
+			  void *font_data HB_UNUSED,
+			  hb_codepoint_t glyph HB_UNUSED,
+			  hb_position_t *x HB_UNUSED,
+			  hb_position_t *y HB_UNUSED,
+			  void *user_data HB_UNUSED)
+{
+  /* We always work in the horizontal coordinates. */
+  return true;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_v_origin (hb_font_t *font HB_UNUSED,
+			  void *font_data,
+			  hb_codepoint_t glyph,
+			  hb_position_t *x,
+			  hb_position_t *y,
+			  void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return false;
+}
+
+static hb_position_t
+hb_ot_get_glyph_h_kerning (hb_font_t *font,
+			   void *font_data,
+			   hb_codepoint_t left_glyph,
+			   hb_codepoint_t right_glyph,
+			   void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return 0;
+}
+
+static hb_position_t
+hb_ot_get_glyph_v_kerning (hb_font_t *font HB_UNUSED,
+			   void *font_data HB_UNUSED,
+			   hb_codepoint_t top_glyph HB_UNUSED,
+			   hb_codepoint_t bottom_glyph HB_UNUSED,
+			   void *user_data HB_UNUSED)
+{
+  return 0;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_extents (hb_font_t *font HB_UNUSED,
+			 void *font_data,
+			 hb_codepoint_t glyph,
+			 hb_glyph_extents_t *extents,
+			 void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return false;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_contour_point (hb_font_t *font HB_UNUSED,
+			       void *font_data,
+			       hb_codepoint_t glyph,
+			       unsigned int point_index,
+			       hb_position_t *x,
+			       hb_position_t *y,
+			       void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return false;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_name (hb_font_t *font HB_UNUSED,
+		      void *font_data,
+		      hb_codepoint_t glyph,
+		      char *name, unsigned int size,
+		      void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return false;
+}
+
+static hb_bool_t
+hb_ot_get_glyph_from_name (hb_font_t *font HB_UNUSED,
+			   void *font_data,
+			   const char *name, int len, /* -1 means nul-terminated */
+			   hb_codepoint_t *glyph,
+			   void *user_data HB_UNUSED)
+{
+  /* TODO */
+  return false;
+}
+
+
+static hb_font_funcs_t *
+_hb_ot_get_font_funcs (void)
+{
+  static const hb_font_funcs_t ot_ffuncs = {
+    HB_OBJECT_HEADER_STATIC,
+
+    true, /* immutable */
+
+    {
+#define HB_FONT_FUNC_IMPLEMENT(name) hb_ot_get_##name,
+      HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
+#undef HB_FONT_FUNC_IMPLEMENT
+    }
+  };
+
+  return const_cast<hb_font_funcs_t *> (&ot_ffuncs);
+}
+
+
+void
+hb_ot_font_set_funcs (hb_font_t *font)
+{
+  hb_ot_font_t *ot_font = _hb_ot_font_create (font);
+  if (unlikely (!ot_font))
+    return;
+
+  hb_font_set_funcs (font,
+		     _hb_ot_get_font_funcs (),
+		     ot_font,
+		     (hb_destroy_func_t) _hb_ot_font_destroy);
+}

src/hb-ot-font.h

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2011  Google, Inc.
+ * Copyright © 2014  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -21,57 +21,21 @@
  * 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
+ * Google Author(s): Behdad Esfahbod, Roozbeh Pournader
  */
 
-#include "hb-font-private.hh" /* Shall be first since may include windows.h */
+#ifndef HB_OT_FONT_H
+#define HB_OT_FONT_H
 
-#include "hb-open-type-private.hh"
+#include "hb.h"
 
-#include "hb-ot-hhea-table.hh"
+HB_BEGIN_DECLS
-#include "hb-ot-hmtx-table.hh"
-
-#include <string.h>
 
 
-
+void
-#if 0
+hb_ot_font_set_funcs (hb_font_t *font);
-struct hb_tt_font_t
-{
-  const struct hhea *hhea;
-  hb_blob_t *hhea_blob;
-};
 
 
-static hb_tt_font_t *
+HB_END_DECLS
-_hb_tt_font_create (hb_font_t *font)
-{
-  /* TODO Remove this object altogether */
-  hb_tt_font_t *tt = (hb_tt_font_t *) calloc (1, sizeof (hb_tt_font_t));
 
-  tt->hhea_blob = Sanitizer<hhea>::sanitize (font->face->reference_table (HB_OT_TAG_hhea));
+#endif /* HB_OT_FONT_H */
-  tt->hhea = Sanitizer<hhea>::lock_instance (tt->hhea_blob);
-
-  return tt;
-}
-
-static void
-_hb_tt_font_destroy (hb_tt_font_t *tt)
-{
-  hb_blob_destroy (tt->hhea_blob);
-
-  free (tt);
-}
-
-static inline const hhea&
-_get_hhea (hb_face_t *face)
-{
-  return likely (face->tt && face->tt->hhea) ? *face->tt->hhea : Null(hhea);
-}
-
-
-/*
- * hb_tt_font_funcs_t
- */
-
-#endif

src/hb-ot-hhea-table.hh

@@ -49,7 +49,7 @@ struct hhea
     return TRACE_RETURN (c->check_struct (this) && likely (version.major == 1));
   }
 
-  protected:
+  public:
   FixedVersion	version;		/* 0x00010000 for version 1.0. */
   FWORD		ascender;		/* Typographic ascent. <a
 					 * href="http://developer.apple.com/fonts/TTRefMan/RM06/Chap6hhea.html">

src/hb-ot-hmtx-table.hh

@@ -59,7 +59,7 @@ struct hmtx
     return TRACE_RETURN (true);
   }
 
-  protected:
+  public:
   LongHorMetric	longHorMetric[VAR];	/* Paired advance width and left side
 					 * bearing values for each glyph. The
 					 * value numOfHMetrics comes from

src/hb-ot.h

@@ -30,6 +30,7 @@
 
 #include "hb.h"
 
+#include "hb-ot-font.h"
 #include "hb-ot-layout.h"
 #include "hb-ot-tag.h"
 #include "hb-ot-shape.h"

util/Makefile.am

@@ -24,8 +24,8 @@ LDADD = \
 	$(NULL)
 
 if HAVE_GLIB
-if HAVE_FREETYPE
 
+if HAVE_FREETYPE
 if HAVE_CAIRO_FT
 hb_view_SOURCES = \
 	hb-view.cc \
@@ -49,6 +49,7 @@ hb_view_LDADD = \
 	$(NULL)
 bin_PROGRAMS += hb-view
 endif # HAVE_CAIRO_FT
+endif # HAVE_FREETYPE
 
 hb_shape_SOURCES = \
 	hb-shape.cc \
@@ -69,7 +70,6 @@ hb_ot_shape_closure_SOURCES = \
 bin_PROGRAMS += hb-ot-shape-closure
 endif # HAVE_OT
 
-endif # HAVE_FREETYPE
 endif # HAVE_GLIB
 
 -include $(top_srcdir)/git.mk

util/options.cc

@@ -28,6 +28,8 @@
 
 #ifdef HAVE_FREETYPE
 #include <hb-ft.h>
+#else
+#include <hb-ot-font.h>
 #endif
 
 
@@ -486,6 +488,8 @@ font_options_t::get_font (void) const
 
 #ifdef HAVE_FREETYPE
   hb_ft_font_set_funcs (font);
+#else
+  hb_ot_font_set_funcs (font);
 #endif
 
   return font;