1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/win/SkIStream.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,131 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkIStream_DEFINED
1.14 +#define SkIStream_DEFINED
1.15 +
1.16 +#define WIN32_LEAN_AND_MEAN
1.17 +#include <windows.h>
1.18 +#include <ole2.h>
1.19 +
1.20 +class SkStream;
1.21 +class SkWStream;
1.22 +
1.23 +/**
1.24 + * A bare IStream implementation which properly reference counts
1.25 + * but returns E_NOTIMPL for all ISequentialStream and IStream methods.
1.26 + */
1.27 +class SkBaseIStream : public IStream {
1.28 +private:
1.29 + LONG _refcount;
1.30 +
1.31 +protected:
1.32 + explicit SkBaseIStream();
1.33 + virtual ~SkBaseIStream();
1.34 +
1.35 +public:
1.36 + virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid
1.37 + , void ** ppvObject);
1.38 + virtual ULONG STDMETHODCALLTYPE AddRef(void);
1.39 + virtual ULONG STDMETHODCALLTYPE Release(void);
1.40 +
1.41 + // ISequentialStream Interface
1.42 +public:
1.43 + virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead);
1.44 +
1.45 + virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
1.46 + , ULONG cb
1.47 + , ULONG* pcbWritten);
1.48 +
1.49 + // IStream Interface
1.50 +public:
1.51 + virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER);
1.52 +
1.53 + virtual HRESULT STDMETHODCALLTYPE CopyTo(IStream*
1.54 + , ULARGE_INTEGER
1.55 + , ULARGE_INTEGER*
1.56 + , ULARGE_INTEGER*);
1.57 +
1.58 + virtual HRESULT STDMETHODCALLTYPE Commit(DWORD);
1.59 +
1.60 + virtual HRESULT STDMETHODCALLTYPE Revert(void);
1.61 +
1.62 + virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER
1.63 + , ULARGE_INTEGER
1.64 + , DWORD);
1.65 +
1.66 + virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER
1.67 + , ULARGE_INTEGER
1.68 + , DWORD);
1.69 +
1.70 + virtual HRESULT STDMETHODCALLTYPE Clone(IStream **);
1.71 +
1.72 + virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove
1.73 + , DWORD dwOrigin
1.74 + , ULARGE_INTEGER* lpNewFilePointer);
1.75 +
1.76 + virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
1.77 + , DWORD grfStatFlag);
1.78 +};
1.79 +
1.80 +/**
1.81 + * A minimal read-only IStream implementation which wraps an SkIStream.
1.82 + */
1.83 +class SkIStream : public SkBaseIStream {
1.84 +private:
1.85 + SkStream *fSkStream;
1.86 + bool fUnrefOnRelease;
1.87 + ULARGE_INTEGER fLocation;
1.88 +
1.89 + SkIStream(SkStream* stream, bool unrefOnRelease);
1.90 + virtual ~SkIStream();
1.91 +
1.92 +public:
1.93 + HRESULT static CreateFromSkStream(SkStream* stream
1.94 + , bool unrefOnRelease
1.95 + , IStream ** ppStream);
1.96 +
1.97 + virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead);
1.98 +
1.99 + virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
1.100 + , ULONG cb
1.101 + , ULONG* pcbWritten);
1.102 +
1.103 + virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove
1.104 + , DWORD dwOrigin
1.105 + , ULARGE_INTEGER* lpNewFilePointer);
1.106 +
1.107 + virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
1.108 + , DWORD grfStatFlag);
1.109 +};
1.110 +
1.111 +/**
1.112 + * A minimal write-only IStream implementation which wraps an SkWIStream.
1.113 + */
1.114 +class SkWIStream : public SkBaseIStream {
1.115 +private:
1.116 + SkWStream *fSkWStream;
1.117 +
1.118 + SkWIStream(SkWStream* stream);
1.119 + virtual ~SkWIStream();
1.120 +
1.121 +public:
1.122 + HRESULT static CreateFromSkWStream(SkWStream* stream, IStream ** ppStream);
1.123 +
1.124 + virtual HRESULT STDMETHODCALLTYPE Write(void const* pv
1.125 + , ULONG cb
1.126 + , ULONG* pcbWritten);
1.127 +
1.128 + virtual HRESULT STDMETHODCALLTYPE Commit(DWORD);
1.129 +
1.130 + virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg
1.131 + , DWORD grfStatFlag);
1.132 +};
1.133 +
1.134 +#endif
