1 /*
2  * Copyright 2013 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #ifndef SkFontStream_DEFINED
9 #define SkFontStream_DEFINED
10 
11 class SkStream;
12 
13 #include "SkTypeface.h"
14 
15 class SkFontStream {
16 public:
17     /**
18      *  Return the number of shared directories inside a TTC sfnt, or return 1
19      *  if the stream is a normal sfnt (ttf). If there is an error or
20      *  no directory is found, return 0.
21      *
22      *  Note: the stream is rewound initially, but is returned at an arbitrary
23      *  read offset.
24      */
25     static int CountTTCEntries(SkStream*);
26 
27     /**
28      *  @param ttcIndex 0 for normal sfnts, or the index within a TTC sfnt.
29      *
30      *  Note: the stream is rewound initially, but is returned at an arbitrary
31      *  read offset.
32      */
33     static int GetTableTags(SkStream*, int ttcIndex, SkFontTableTag tags[]);
34 
35     /**
36      *  @param ttcIndex 0 for normal sfnts, or the index within a TTC sfnt.
37      *
38      *  Note: the stream is rewound initially, but is returned at an arbitrary
39      *  read offset.
40      */
41     static size_t GetTableData(SkStream*, int ttcIndex, SkFontTableTag tag,
42                                size_t offset, size_t length, void* data);
43 
GetTableSize(SkStream * stream,int ttcIndex,SkFontTableTag tag)44     static size_t GetTableSize(SkStream* stream, int ttcIndex, SkFontTableTag tag) {
45         return GetTableData(stream, ttcIndex, tag, 0, ~0U, nullptr);
46     }
47 };
48 
49 #endif
50