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gerrit-public.fairphone.software / platform / external / skia / 07631cf14e22e772f901baf68545ee48c3d1e014 / . / include / utils / win / SkIStream.h
blob: e4e045c9888af86a77aa58c98640dff0e4c249de [file] [log] [blame]
epoger@google.comec3ed6a2011-07-28 14:26:00 +0000[diff] [blame]1
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]2/*
epoger@google.comec3ed6a2011-07-28 14:26:00 +0000[diff] [blame]3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]7 */
8
epoger@google.comec3ed6a2011-07-28 14:26:00 +0000[diff] [blame]9
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]10#ifndef SkIStream_DEFINED
11#define SkIStream_DEFINED
12
13#define WIN32_LEAN_AND_MEAN
14#include <Windows.h>
15#include <ole2.h>
16
17class SkStream;
18class SkWStream;
19
20/**
21 * A bare IStream implementation which properly reference counts
22 * but returns E_NOTIMPL for all ISequentialStream and IStream methods.
23 */
24class SkBaseIStream : public IStream {
25private:
26 LONG _refcount;
27
28protected:
29 explicit SkBaseIStream();
30 virtual ~SkBaseIStream();
31
32public:
33 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid
34 , void ** ppvObject);
35 virtual ULONG STDMETHODCALLTYPE AddRef(void);
36 virtual ULONG STDMETHODCALLTYPE Release(void);
37
38 // ISequentialStream Interface
39public:
40 virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead);
41
42 virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
43 , ULONG cb
44 , ULONG* pcbWritten);
45
46 // IStream Interface
47public:
48 virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]49
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]50 virtual HRESULT STDMETHODCALLTYPE CopyTo(IStream*
51 , ULARGE_INTEGER
52 , ULARGE_INTEGER*
53 , ULARGE_INTEGER*);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]54
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]55 virtual HRESULT STDMETHODCALLTYPE Commit(DWORD);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]56
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]57 virtual HRESULT STDMETHODCALLTYPE Revert(void);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]58
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]59 virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER
60 , ULARGE_INTEGER
61 , DWORD);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]62
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]63 virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER
64 , ULARGE_INTEGER
65 , DWORD);
rmistry@google.comfbfcd562012-08-23 18:09:54 +0000[diff] [blame]66
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]67 virtual HRESULT STDMETHODCALLTYPE Clone(IStream **);
68
69 virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove
70 , DWORD dwOrigin
71 , ULARGE_INTEGER* lpNewFilePointer);
72
73 virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
74 , DWORD grfStatFlag);
75};
76
77/**
78 * A minimal read-only IStream implementation which wraps an SkIStream.
79 */
80class SkIStream : public SkBaseIStream {
81private:
82 SkStream *fSkStream;
83 bool fUnrefOnRelease;
bungeman@google.com60157922011-08-13 00:06:17 +0000[diff] [blame]84 ULARGE_INTEGER fLocation;
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]85
86 SkIStream(SkStream* stream, bool unrefOnRelease);
87 virtual ~SkIStream();
88
89public:
90 HRESULT static CreateFromSkStream(SkStream* stream
91 , bool unrefOnRelease
92 , IStream ** ppStream);
93
94 virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead);
95
96 virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
97 , ULONG cb
98 , ULONG* pcbWritten);
99
100 virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove
101 , DWORD dwOrigin
102 , ULARGE_INTEGER* lpNewFilePointer);
103
104 virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
105 , DWORD grfStatFlag);
106};
107
108/**
109 * A minimal write-only IStream implementation which wraps an SkWIStream.
110 */
111class SkWIStream : public SkBaseIStream {
112private:
113 SkWStream *fSkWStream;
114
115 SkWIStream(SkWStream* stream);
116 virtual ~SkWIStream();
117
118public:
119 HRESULT static CreateFromSkWStream(SkWStream* stream, IStream ** ppStream);
120
121 virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
122 , ULONG cb
123 , ULONG* pcbWritten);
124
bungeman@google.com14fc3212011-08-01 20:41:53 +0000[diff] [blame]125 virtual HRESULT STDMETHODCALLTYPE Commit(DWORD);
126
bungeman@google.com9df621d2011-06-23 21:43:52 +0000[diff] [blame]127 virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
128 , DWORD grfStatFlag);
129};
130
131#endif