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#pragma once
#include "Core/Io/Stream.h"
#ifdef WINDOWS
// Note: this is a bit too general... We only need IStream.
#include <wincodec.h>
namespace graphics {
typedef ::IStream ComStream;
// A wrapper around storm::IStream to support the com object IStream.
// It assumes that the Stream will exist the entire lifetime of the IStreamWrapper object.
// Note: since this object contains GC:d pointers and is not a Storm object, it needs to be stack allocated.
class IStreamWrapper : public ComStream {
IStreamWrapper(storm::RIStream **src) : src(src) {
refcount = 1;
}
public:
~IStreamWrapper() {}
static IStreamWrapper *create(storm::RIStream **src) {
return new IStreamWrapper(src);
}
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void **ppvObject) {
if (iid == __uuidof(IUnknown) || iid == __uuidof(ComStream) || iid == __uuidof(ISequentialStream)) {
*ppvObject = static_cast<ComStream*>(this);
AddRef();
return S_OK;
} else {
return E_NOINTERFACE;
}
}
virtual ULONG STDMETHODCALLTYPE AddRef(void) {
return (ULONG)InterlockedIncrement(&refcount);
}
virtual ULONG STDMETHODCALLTYPE Release(void) {
ULONG res = (ULONG)InterlockedDecrement(&refcount);
if (res == 0)
delete this;
return res;
}
// ISequentialStream Interface
public:
virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead) {
Buffer r = (*src)->read(buffer((*src)->engine(), Nat(cb)));
*pcbRead = ULONG(r.filled());
memcpy(pv, r.dataPtr(), r.filled());
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE Write(void const* pv, ULONG cb, ULONG* pcbWritten) {
return E_NOTIMPL;
// src.write(cb, pv);
// *pcbWritten = cb;
// return S_OK;
}
// IStream Interface
public:
virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE CopyTo(ComStream*, ULARGE_INTEGER, ULARGE_INTEGER*, ULARGE_INTEGER*) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Commit(DWORD) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Revert(void) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Clone(ComStream **) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove, DWORD dwOrigin, ULARGE_INTEGER* lpNewFilePointer) {
int64 p = liDistanceToMove.QuadPart;
switch (dwOrigin) {
case STREAM_SEEK_SET:
(*src)->seek(Word(p));
break;
case STREAM_SEEK_CUR:
(*src)->seek(Word((*src)->tell() + p));
break;
case STREAM_SEEK_END:
(*src)->seek(Word((*src)->length() + p));
break;
default:
return STG_E_INVALIDFUNCTION;
}
if (lpNewFilePointer)
lpNewFilePointer->QuadPart = (*src)->tell();
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg, DWORD grfStatFlag) {
pStatstg->cbSize.QuadPart = (*src)->length();
return S_OK;
}
private:
LONG refcount;
storm::RIStream **src;
};
// A wrapper around storm::OStream to support the com object IStream.
// It assumes that the Stream will exist the entire lifetime of the OStreamWrapper object.
// Note: since this object contains GC:d pointers and is not a Storm object, it needs to be stack allocated.
class OStreamWrapper : public ComStream {
OStreamWrapper(storm::OStream **dest) : dest(dest) {
refcount = 1;
}
public:
~OStreamWrapper() {}
static OStreamWrapper *create(storm::OStream **src) {
return new OStreamWrapper(src);
}
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void **ppvObject) {
if (iid == __uuidof(IUnknown) || iid == __uuidof(ComStream) || iid == __uuidof(ISequentialStream)) {
*ppvObject = static_cast<ComStream*>(this);
AddRef();
return S_OK;
} else {
return E_NOINTERFACE;
}
}
virtual ULONG STDMETHODCALLTYPE AddRef(void) {
return (ULONG)InterlockedIncrement(&refcount);
}
virtual ULONG STDMETHODCALLTYPE Release(void) {
ULONG res = (ULONG)InterlockedDecrement(&refcount);
if (res == 0)
delete this;
return res;
}
// ISequentialStream Interface
public:
virtual HRESULT STDMETHODCALLTYPE Read(void* pv, ULONG cb, ULONG* pcbRead) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Write(void const* pv, ULONG cb, ULONG* pcbWritten) {
Nat out = (*dest)->write(buffer((*dest)->engine(), (byte *)pv, cb));
if (pcbWritten)
*pcbWritten = (ULONG)out;
return S_OK;
}
// IStream Interface
public:
virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE CopyTo(ComStream*, ULARGE_INTEGER, ULARGE_INTEGER*, ULARGE_INTEGER*) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Commit(DWORD) {
PLN(L"Flush!");
(*dest)->flush();
return S_OK;
}
virtual HRESULT STDMETHODCALLTYPE Revert(void) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER, ULARGE_INTEGER, DWORD) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Clone(ComStream **) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER liDistanceToMove, DWORD dwOrigin, ULARGE_INTEGER* lpNewFilePointer) {
return E_NOTIMPL;
}
virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG* pStatstg, DWORD grfStatFlag) {
return E_NOTIMPL;
}
private:
LONG refcount;
storm::OStream **dest;
};
}
#endif
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