From 28c3fa7d4cbfdabfea03003c70d86c0fe2cf08ed Mon Sep 17 00:00:00 2001
From: handa <handa>
Date: Tue, 24 Nov 2009 04:31:56 +0000
Subject: [PATCH] (update_seq_area): Call OTF_driver_gsub_with_log and
 OTF_driver_gpos_with_log.  Show which features are applied.

---
 example/otfview.c |   71 +++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 64 insertions(+), 7 deletions(-)

diff --git a/example/otfview.c b/example/otfview.c
index 4be053f..98efa4b 100644
--- a/example/otfview.c
+++ b/example/otfview.c
@@ -353,6 +353,8 @@ update_seq_area ()
   int len = glyph_rec.n_glyphs;
   Arg arg[1];
   int unitsPerEm = face->units_per_EM;
+  OTF_Tag *log = NULL;
+  int logsize;
 
   gstring.size = gstring.used = len;
   gstring.glyphs = malloc (sizeof (OTF_Glyph) * len);
@@ -393,7 +395,20 @@ update_seq_area ()
 		OTF_drive_gsub_alternate (otf, &gstring,
 					  script_name, langsys_name, str);
 	      else
-		OTF_drive_gsub (otf, &gstring, script_name, langsys_name, str);
+		{
+		  OTF_drive_gsub_with_log (otf, &gstring,
+					   script_name, langsys_name, str);
+		  logsize = gstring.used * 2;
+		  log = alloca (sizeof (OTF_Tag) * logsize);
+		  for (i = 0; i < gstring.used; i++)
+		    {
+		      int idx = gstring.glyphs[i].positioning_type >> 4;
+		      if (idx)
+			log[i] = otf->gsub->FeatureList.Feature[idx - 1].FeatureTag;
+		      else
+			log[i] = 0;
+		    }
+		}
 	      free (str);
 	    }
 	}
@@ -402,7 +417,32 @@ update_seq_area ()
 	  str = get_features (&otf->gpos->FeatureList, &gpos);
 	  if (str)
 	    {
-	      OTF_drive_gpos2 (otf, &gstring, script_name, langsys_name, str);
+	      OTF_drive_gpos_with_log (otf, &gstring,
+				       script_name, langsys_name, str);
+	      if (log)
+		{
+		  if (logsize < gstring.used)
+		    {
+		      OTF_Tag *log2 = alloca (sizeof (OTF_Tag) * gstring.used);
+		      memset (log2, 0, sizeof (OTF_Tag) * gstring.used);
+		      memcpy (log2, log, sizeof (OTF_Tag) * logsize);
+		      logsize = gstring.used;
+		      log = log2;
+		    }
+		}
+	      else
+		{
+		  logsize = gstring.used;
+		  log = alloca (sizeof (OTF_Tag) * logsize);
+		  memset (log, 0, sizeof (OTF_Tag) * logsize);
+		}
+	      for (i = 0; i < gstring.used; i++)
+		{
+		  int idx = gstring.glyphs[i].positioning_type >> 4;
+		  if (idx)
+		    log[i] = otf->gpos->FeatureList.Feature[idx - 1].FeatureTag;
+
+		}
 	      free (str);
 	    }
 	}
@@ -445,11 +485,11 @@ update_seq_area ()
 	    continue;
 	  advance = bmp->advance;
 	}
-      if (g->positioning_type)
+      if (g->positioning_type & 0xF)
 	{
 	  while (1)
 	    {
-	      switch (g->positioning_type)
+	      switch (g->positioning_type & 0xF)
 		{
 		case 1: case 2:
 		  {
@@ -504,7 +544,7 @@ update_seq_area ()
 		}
 	      if (i + 1 == gstring.used
 		  || gstring.glyphs[i + 1].glyph_id
-		  || ! gstring.glyphs[i + 1].positioning_type)
+		  || ! (gstring.glyphs[i + 1].positioning_type & 0xF))
 		break;
 	      i++, g++;
 	    }
@@ -530,10 +570,27 @@ update_seq_area ()
     {
       int size = render_width / FONT_WIDTH;
       char *buf = alloca (size + 1);
+      char name[5];
 
       sprintf (buf, "%04X", gstring.glyphs[0].glyph_id);
-      for (i = 1, x = 4; i < gstring.used; i++, x += 5)
-	sprintf (buf + x, " %04X", gstring.glyphs[i].glyph_id);
+      if (log && log[0])
+	{
+	  OTF_tag_name (log[0], name);
+	  sprintf (buf + 4, " (%s)", name);
+	  x = 11;
+	}
+      else
+	x = 4;
+      for (i = 1; i < gstring.used && x + 5 < size; i++, x += 5)
+	{
+	  sprintf (buf + x, " %04X", gstring.glyphs[i].glyph_id);
+	  if (log && log[i] && x + 11 < size)
+	    {
+	      OTF_tag_name (log[i], name);
+	      sprintf (buf + x + 5, "(%s)", name);
+	      x += 6;
+	    }
+	}
       while (x < size)
 	buf[x++] = ' ';
       buf[x] = '\0';
-- 
1.7.10.4