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windowscodecs: Support Seek for memory streams in IWICStream.

This commit is contained in:
Tony Wasserka 2009-08-21 11:11:39 +02:00 committed by Alexandre Julliard
parent 0b6df19375
commit 2395202388
1 changed files with 17 additions and 2 deletions
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19
dlls/windowscodecs/stream.c
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@ -125,8 +125,23 @@ static HRESULT WINAPI StreamOnMemory_Write(IStream *iface,
static HRESULT WINAPI StreamOnMemory_Seek(IStream *iface,
LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)
{
FIXME("(%p): stub\n", iface);
return E_NOTIMPL;
StreamOnMemory *This = (StreamOnMemory*)iface;
LARGE_INTEGER NewPosition;
TRACE("(%p)\n", This);
if (dlibMove.QuadPart > 0xFFFFFFFF) return HRESULT_FROM_WIN32(ERROR_ARITHMETIC_OVERFLOW);
if (dwOrigin == STREAM_SEEK_SET) NewPosition.QuadPart = dlibMove.QuadPart;
else if (dwOrigin == STREAM_SEEK_CUR) NewPosition.QuadPart = This->dwCurPos + dlibMove.QuadPart;
else if (dwOrigin == STREAM_SEEK_END) NewPosition.QuadPart = This->dwMemsize + dlibMove.QuadPart;
else return E_INVALIDARG;
if (NewPosition.QuadPart > This->dwMemsize) return E_INVALIDARG;
if (NewPosition.QuadPart < 0) return E_INVALIDARG;
This->dwCurPos = NewPosition.LowPart;
if(plibNewPosition) plibNewPosition->QuadPart = This->dwCurPos;
return S_OK;
}
/* SetSize isn't implemented in the native windowscodecs DLL either */