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
11class SkStream;
12
13#include "SkTypeface.h"
14
15class SkFontStream {
16public:
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
44    static size_t GetTableSize(SkStream* stream, int ttcIndex, SkFontTableTag tag) {
45        return GetTableData(stream, ttcIndex, tag, 0, ~0U, NULL);
46    }
47};
48
49#endif
50