From 322ee2c98babc81ec26df629b5ea08288e3187da Mon Sep 17 00:00:00 2001
From: handa <handa>
Date: Wed, 18 Nov 2009 02:10:44 +0000
Subject: [PATCH] (read_header_part): Handle TTC (TrueType Collection).
 (OTF_open): Accept "ttc".

---
 src/otfopen.c |   51 +++++++++++++++++++++++++++++++++------------------
 1 file changed, 33 insertions(+), 18 deletions(-)

diff --git a/src/otfopen.c b/src/otfopen.c
index c49eb1d..2cdb3f5 100644
--- a/src/otfopen.c
+++ b/src/otfopen.c
@@ -541,7 +541,7 @@ read_cmap_uvs_table (OTF *otf, OTF_Stream *stream, OTF_Offset offset)
   READ_ULONG (stream, nRecords);
   sub14->nRecords = nRecords;
   OTF_MALLOC (sub14->Records, nRecords, "(EncodingSubtable14-Records)");
-  for (i = 0; i < sub14->nRecords; i++) 
+  for (i = 0; i < sub14->nRecords; i++)
     {
       unsigned varSelector=0, defaultUVSOffset, nonDefaultUVSOffset;
 
@@ -552,25 +552,25 @@ read_cmap_uvs_table (OTF *otf, OTF_Stream *stream, OTF_Offset offset)
       READ_ULONG (stream, nonDefaultUVSOffset);
       sub14->Records[i].nonDefaultUVSOffset = nonDefaultUVSOffset;
     }
-  for (i = 0; i < sub14->nRecords; i++) 
+  for (i = 0; i < sub14->nRecords; i++)
     {
       OTF_VariationSelectorRecord *record = &sub14->Records[i];
       unsigned defaultUVSOffset = record->defaultUVSOffset;
       unsigned nonDefaultUVSOffset = record->nonDefaultUVSOffset;
 
-      if (defaultUVSOffset) 
+      if (defaultUVSOffset)
 	{
 	  unsigned numUnicodeValueRanges;
 
 	  SEEK_STREAM (stream, offset+defaultUVSOffset);
 	  READ_ULONG (stream, numUnicodeValueRanges);
 	  record->numUnicodeValueRanges = numUnicodeValueRanges;
-	  OTF_MALLOC (record->unicodeValueRanges, 
+	  OTF_MALLOC (record->unicodeValueRanges,
 		      numUnicodeValueRanges,
 		      "(EncodingSubtable14-Records-unicodeValueRanges)");
 	  for (j = 0; j < numUnicodeValueRanges; j++)
 	    {
-	      OTF_UnicodeValueRange *unicodeValueRange 
+	      OTF_UnicodeValueRange *unicodeValueRange
 		= &record->unicodeValueRanges[j];
 	      unsigned startUnicodeValue;
 	      char additionalCount;
@@ -582,7 +582,7 @@ read_cmap_uvs_table (OTF *otf, OTF_Stream *stream, OTF_Offset offset)
 		= (unsigned short) additionalCount;
 	    }
 	}
-      if (nonDefaultUVSOffset) 
+      if (nonDefaultUVSOffset)
 	{
 	  unsigned numUVSMappings;
 
@@ -656,7 +656,7 @@ read_cmap_table (OTF *otf, OTF_TableInfo *table, enum OTF_ReaderFlag flag)
       cmap->EncodingRecord[i].subtable.format = format;
       if (format == 14)
 	{
-	  READ_ULONG (stream, cmap->EncodingRecord[i].subtable.length);	    
+	  READ_ULONG (stream, cmap->EncodingRecord[i].subtable.length);
 	  cmap->EncodingRecord[i].subtable.language = 0;
 	}
       else
@@ -743,7 +743,7 @@ read_cmap_table (OTF *otf, OTF_TableInfo *table, enum OTF_ReaderFlag flag)
 	      {
 		unsigned off;
 		unsigned rest = 2 * (segCount - j);
-		
+
 		READ_USHORT (stream, off);
 		if (off == 0)
 		  sub4->segments[j].idRangeOffset = 0xFFFF;
@@ -2019,7 +2019,7 @@ read_reverse_chain1 (OTF *otf, OTF_Stream *stream, long offset,
   count = read_glyph_ids (otf, stream, &reverse_chain->Substitute, 0, -1);
   if (count <= 0)
     return -1;
-  reverse_chain->GlyphCount = count;  
+  reverse_chain->GlyphCount = count;
   return 0;
 }
 
@@ -2808,19 +2808,34 @@ read_header_part (OTF *otf, FILE *fp, FT_Face face)
       OTF_Tag gsub_tag = OTF_tag ("GSUB");
       OTF_Tag gpos_tag = OTF_tag ("GPOS");
       OTF_Stream *stream = make_stream ("Offset Table");
+      unsigned char ttctag[4];
 
       if (! stream)
 	return -1;
       internal_data->header_stream = stream;
 
-      /* Size of Offset Table is 12 bytes.  */
-      if (setup_stream (stream, fp, 0, 12) < 0)
+      /* Size of Offset Table is 12 bytes.  Size of TTC header
+	 (including only the an offset of the first font) is 16.  */
+      if (setup_stream (stream, fp, 0, 16) < 0)
 	return -1;
+      READ_BYTES (stream, ttctag, 4);
+      if (memcmp (ttctag, "ttcf", 4) == 0)
+	{
+	  /* This is a TrueType Collection file.  We extract the first font.  */
+	  unsigned version, numfonts, offset;
+	  READ_ULONG (stream, version);
+	  READ_ULONG (stream, numfonts);
+	  READ_ULONG (stream, offset); /* Offset of the first font.  */
+	  if (setup_stream (stream, fp, offset, 12) < 0)
+	    return -1;
+	}
+      else
+	SEEK_STREAM (stream, 0L);
       if (read_offset_table (otf, stream, &otf->offset_table) < 0)
 	return -1;
-
       /* Size of each Table Directory is 16 bytes.  */
-      if (setup_stream (stream, fp, 12, 16 * otf->offset_table.numTables) < 0)
+      if (setup_stream (stream, fp, stream->pos,
+			16 * otf->offset_table.numTables) < 0)
 	return -1;
 
       OTF_CALLOC (otf->table_dirs, otf->offset_table.numTables,
@@ -2947,9 +2962,9 @@ OTF_open (const char *otf_name)
 
   if (len < 4
       || ext[0] != '.'
-      || (ext[1] != 'O' && ext[1] != 'T' && ext[1] != 'o' && ext[1] != 't')
-      || (ext[2] != 'T' && ext[2] != 't')
-      || (ext[3] != 'F' && ext[3] != 'f'))
+      || (strncasecmp (ext + 1, "otf", 3)
+	  && strncasecmp (ext + 1, "ttf", 3)
+	  && strncasecmp (ext + 1, "ttc", 3)))
     OTF_ERROR (OTF_ERROR_FILE, otf_name);
   fp = fopen (otf_name, "r");
   if (! fp)
@@ -3004,7 +3019,7 @@ OTF_open_ft_face (FT_Face face)
   if (! otf)
     OTF_ERROR (OTF_ERROR_MEMORY, "body allocation");
   otf->filename = NULL;
-  
+
   internal_data = calloc (1, sizeof (OTF_InternalData));
   if (! internal_data)
     OTF_ERROR (OTF_ERROR_MEMORY, " (InternalData");
@@ -3285,7 +3300,7 @@ OTF_get_data (OTF *otf, char *id)
 {
   OTF_InternalData *internal_data = (OTF_InternalData *) otf->internal_data;
   OTF_ApplicationData *app_data = internal_data->app_data;
-  
+
   for (; app_data; app_data = app_data->next)
     if (strcmp (app_data->id, id) == 0)
       return app_data->data;
-- 
1.7.10.4