647 lines
18 KiB
C++
647 lines
18 KiB
C++
|
#include "priv.h"
|
||
|
|
#include <iimgctx.h>
|
||
|
|
|
||
|
|
|
||
|
|
class CImgCtxThumb : public IExtractImage2,
|
||
|
|
public IRunnableTask,
|
||
|
|
public IPersistFile
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
CImgCtxThumb();
|
||
|
|
~CImgCtxThumb();
|
||
|
|
|
||
|
|
STDMETHOD(QueryInterface) (REFIID riid, void **ppvObj);
|
||
|
|
STDMETHOD_(ULONG, AddRef) (void);
|
||
|
|
STDMETHOD_(ULONG, Release) (void);
|
||
|
|
|
||
|
|
// IExtractImage
|
||
|
|
STDMETHOD (GetLocation) (LPWSTR pszPathBuffer,
|
||
|
|
DWORD cch,
|
||
|
|
DWORD * pdwPriority,
|
||
|
|
const SIZE * prgSize,
|
||
|
|
DWORD dwRecClrDepth,
|
||
|
|
DWORD *pdwFlags);
|
||
|
|
|
||
|
|
STDMETHOD (Extract)(HBITMAP * phBmpThumbnail);
|
||
|
|
|
||
|
|
STDMETHOD (GetDateStamp) (FILETIME * pftTimeStamp);
|
||
|
|
|
||
|
|
// IPersistFile
|
||
|
|
STDMETHOD (GetClassID)(CLSID *pClassID);
|
||
|
|
STDMETHOD (IsDirty)();
|
||
|
|
STDMETHOD (Load)(LPCOLESTR pszFileName, DWORD dwMode);
|
||
|
|
STDMETHOD (Save)(LPCOLESTR pszFileName, BOOL fRemember);
|
||
|
|
STDMETHOD (SaveCompleted)(LPCOLESTR pszFileName);
|
||
|
|
STDMETHOD (GetCurFile)(LPOLESTR *ppszFileName);
|
||
|
|
|
||
|
|
STDMETHOD (Run)();
|
||
|
|
STDMETHOD (Kill)(BOOL fWait);
|
||
|
|
STDMETHOD (Suspend)();
|
||
|
|
STDMETHOD (Resume)();
|
||
|
|
STDMETHOD_(ULONG, IsRunning)();
|
||
|
|
|
||
|
|
STDMETHOD (InternalResume)();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
friend void CALLBACK OnImgCtxChange(void * pvImgCtx, void * pv);
|
||
|
|
void CImgCtxThumb::CalcAspectScaledRect(const SIZE * prgSize,
|
||
|
|
RECT * pRect);
|
||
|
|
void CImgCtxThumb::CalculateAspectRatio(const SIZE * prgSize,
|
||
|
|
RECT * pRect);
|
||
|
|
|
||
|
|
long m_cRef;
|
||
|
|
BITBOOL m_fAsync : 1;
|
||
|
|
BITBOOL m_fOrigSize : 1;
|
||
|
|
WCHAR m_szPath[MAX_PATH * 4 + 7];
|
||
|
|
HANDLE m_hEvent;
|
||
|
|
SIZE m_rgSize;
|
||
|
|
DWORD m_dwRecClrDepth;
|
||
|
|
IImgCtx * m_pImg;
|
||
|
|
LONG m_lState;
|
||
|
|
HBITMAP * m_phBmp;
|
||
|
|
};
|
||
|
|
|
||
|
|
STDAPI CImgCtxThumb_CreateInstance(IUnknown* pUnkOuter, IUnknown** ppunk, LPCOBJECTINFO poi)
|
||
|
|
{
|
||
|
|
*ppunk = NULL;
|
||
|
|
|
||
|
|
CImgCtxThumb * pExtract = new CImgCtxThumb();
|
||
|
|
if (pExtract != NULL)
|
||
|
|
{
|
||
|
|
*ppunk = SAFECAST(pExtract, IPersistFile *);
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
CImgCtxThumb::CImgCtxThumb()
|
||
|
|
{
|
||
|
|
m_fAsync = FALSE;
|
||
|
|
StrCpyW(m_szPath, L"file://");
|
||
|
|
m_cRef = 1;
|
||
|
|
|
||
|
|
DllAddRef();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
CImgCtxThumb::~CImgCtxThumb()
|
||
|
|
{
|
||
|
|
ATOMICRELEASE(m_pImg);
|
||
|
|
if (m_hEvent)
|
||
|
|
{
|
||
|
|
CloseHandle(m_hEvent);
|
||
|
|
}
|
||
|
|
DllRelease();
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::QueryInterface(REFIID riid, void **ppvObj)
|
||
|
|
{
|
||
|
|
static const QITAB qit[] = {
|
||
|
|
QITABENTMULTI(CImgCtxThumb, IExtractImage, IExtractImage2),
|
||
|
|
QITABENT(CImgCtxThumb, IExtractImage2),
|
||
|
|
QITABENT(CImgCtxThumb, IRunnableTask),
|
||
|
|
QITABENT(CImgCtxThumb, IPersistFile),
|
||
|
|
{ 0 },
|
||
|
|
};
|
||
|
|
|
||
|
|
return QISearch(this, qit, riid, ppvObj);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP_(ULONG) CImgCtxThumb::AddRef()
|
||
|
|
{
|
||
|
|
return InterlockedIncrement(&m_cRef);
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP_(ULONG) CImgCtxThumb::Release()
|
||
|
|
{
|
||
|
|
if (InterlockedDecrement(&m_cRef))
|
||
|
|
return m_cRef;
|
||
|
|
|
||
|
|
delete this;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::GetLocation (LPWSTR pszPathBuffer,
|
||
|
|
DWORD cch,
|
||
|
|
DWORD * pdwPriority,
|
||
|
|
const SIZE * prgSize,
|
||
|
|
DWORD dwRecClrDepth,
|
||
|
|
DWORD *pdwFlags)
|
||
|
|
{
|
||
|
|
if (!pdwFlags || !pszPathBuffer || !prgSize)
|
||
|
|
{
|
||
|
|
return E_INVALIDARG;
|
||
|
|
}
|
||
|
|
|
||
|
|
m_rgSize = *prgSize;
|
||
|
|
m_dwRecClrDepth = dwRecClrDepth;
|
||
|
|
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
if (*pdwFlags & IEIFLAG_ASYNC)
|
||
|
|
{
|
||
|
|
if (!pdwPriority)
|
||
|
|
{
|
||
|
|
return E_INVALIDARG;
|
||
|
|
}
|
||
|
|
|
||
|
|
hr = E_PENDING;
|
||
|
|
m_fAsync = TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
m_fOrigSize = BOOLIFY(*pdwFlags & IEIFLAG_ORIGSIZE);
|
||
|
|
|
||
|
|
*pdwFlags = IEIFLAG_CACHE;
|
||
|
|
|
||
|
|
PathCreateFromUrlW(m_szPath, pszPathBuffer, &cch, URL_UNESCAPE);
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CALLBACK OnImgCtxChange(void * pvImgCtx, void * pv)
|
||
|
|
{
|
||
|
|
CImgCtxThumb * pThis = (CImgCtxThumb *) pv;
|
||
|
|
ASSERT(pThis);
|
||
|
|
ASSERT(pThis->m_hEvent);
|
||
|
|
|
||
|
|
// we only asked to know about complete anyway....
|
||
|
|
SetEvent(pThis->m_hEvent);
|
||
|
|
}
|
||
|
|
|
||
|
|
// This function makes no assumption about whether the thumbnail is square, so
|
||
|
|
// it calculates the scaling ratio for both dimensions and the uses that as
|
||
|
|
// the scaling to maintain the aspect ratio.
|
||
|
|
void CImgCtxThumb::CalcAspectScaledRect(const SIZE * prgSize, RECT * pRect)
|
||
|
|
{
|
||
|
|
ASSERT(pRect->left == 0);
|
||
|
|
ASSERT(pRect->top == 0);
|
||
|
|
|
||
|
|
int iWidth = pRect->right;
|
||
|
|
int iHeight = pRect->bottom;
|
||
|
|
int iXRatio = (iWidth * 1000) / prgSize->cx;
|
||
|
|
int iYRatio = (iHeight * 1000) / prgSize->cy;
|
||
|
|
|
||
|
|
if (iXRatio > iYRatio)
|
||
|
|
{
|
||
|
|
pRect->right = prgSize->cx;
|
||
|
|
|
||
|
|
// work out the blank space and split it evenly between the top and the bottom...
|
||
|
|
int iNewHeight = ((iHeight * 1000) / iXRatio);
|
||
|
|
if (iNewHeight == 0)
|
||
|
|
{
|
||
|
|
iNewHeight = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
int iRemainder = prgSize->cy - iNewHeight;
|
||
|
|
|
||
|
|
pRect->top = iRemainder / 2;
|
||
|
|
pRect->bottom = iNewHeight + pRect->top;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
pRect->bottom = prgSize->cy;
|
||
|
|
|
||
|
|
// work out the blank space and split it evenly between the left and the right...
|
||
|
|
int iNewWidth = ((iWidth * 1000) / iYRatio);
|
||
|
|
if (iNewWidth == 0)
|
||
|
|
{
|
||
|
|
iNewWidth = 1;
|
||
|
|
}
|
||
|
|
int iRemainder = prgSize->cx - iNewWidth;
|
||
|
|
|
||
|
|
pRect->left = iRemainder / 2;
|
||
|
|
pRect->right = iNewWidth + pRect->left;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void CImgCtxThumb::CalculateAspectRatio(const SIZE * prgSize, RECT * pRect)
|
||
|
|
{
|
||
|
|
int iHeight = abs(pRect->bottom - pRect->top);
|
||
|
|
int iWidth = abs(pRect->right - pRect->left);
|
||
|
|
|
||
|
|
// check if the initial bitmap is larger than the size of the thumbnail.
|
||
|
|
if (iWidth > prgSize->cx || iHeight > prgSize->cy)
|
||
|
|
{
|
||
|
|
pRect->left = 0;
|
||
|
|
pRect->top = 0;
|
||
|
|
pRect->right = iWidth;
|
||
|
|
pRect->bottom = iHeight;
|
||
|
|
|
||
|
|
CalcAspectScaledRect(prgSize, pRect);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// if the bitmap was smaller than the thumbnail, just center it.
|
||
|
|
pRect->left = (prgSize->cx - iWidth) / 2;
|
||
|
|
pRect->top = (prgSize->cy- iHeight) / 2;
|
||
|
|
pRect->right = pRect->left + iWidth;
|
||
|
|
pRect->bottom = pRect->top + iHeight;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Extract(HBITMAP * phBmpThumbnail)
|
||
|
|
{
|
||
|
|
m_hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
|
||
|
|
if (!m_hEvent)
|
||
|
|
{
|
||
|
|
return E_OUTOFMEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
m_phBmp = phBmpThumbnail;
|
||
|
|
|
||
|
|
return InternalResume();
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::GetDateStamp(FILETIME * pftTimeStamp)
|
||
|
|
{
|
||
|
|
ASSERT(pftTimeStamp);
|
||
|
|
|
||
|
|
WIN32_FIND_DATAW rgData;
|
||
|
|
WCHAR szBuffer[MAX_PATH];
|
||
|
|
|
||
|
|
DWORD dwSize = ARRAYSIZE(szBuffer);
|
||
|
|
PathCreateFromUrlW(m_szPath, szBuffer, &dwSize, URL_UNESCAPE);
|
||
|
|
|
||
|
|
HANDLE hFind = FindFirstFileW(szBuffer, &rgData);
|
||
|
|
if (INVALID_HANDLE_VALUE != hFind)
|
||
|
|
{
|
||
|
|
*pftTimeStamp = rgData.ftLastWriteTime;
|
||
|
|
FindClose(hFind);
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
return E_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::GetClassID(CLSID *pClassID)
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::IsDirty()
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Load(LPCOLESTR pszFileName, DWORD dwMode)
|
||
|
|
{
|
||
|
|
if (!pszFileName)
|
||
|
|
{
|
||
|
|
return E_INVALIDARG;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lstrlenW(pszFileName) > ARRAYSIZE(m_szPath) - 6)
|
||
|
|
{
|
||
|
|
return E_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
DWORD dwSize = ARRAYSIZE(m_szPath);
|
||
|
|
UrlCreateFromPathW(pszFileName, m_szPath, &dwSize, URL_ESCAPE_UNSAFE);
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Save(LPCOLESTR pszFileName, BOOL fRemember)
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::SaveCompleted(LPCOLESTR pszFileName)
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::GetCurFile(LPOLESTR *ppszFileName)
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Run()
|
||
|
|
{
|
||
|
|
return E_NOTIMPL;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Kill(BOOL fUnused)
|
||
|
|
{
|
||
|
|
LONG lRes = InterlockedExchange(& m_lState, IRTIR_TASK_PENDING);
|
||
|
|
if (lRes != IRTIR_TASK_RUNNING)
|
||
|
|
{
|
||
|
|
m_lState = lRes;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_hEvent)
|
||
|
|
SetEvent(m_hEvent);
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Resume()
|
||
|
|
{
|
||
|
|
if (m_lState != IRTIR_TASK_SUSPENDED)
|
||
|
|
{
|
||
|
|
return S_FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return InternalResume();
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::Suspend()
|
||
|
|
{
|
||
|
|
LONG lRes = InterlockedExchange(& m_lState, IRTIR_TASK_SUSPENDED);
|
||
|
|
if (lRes != IRTIR_TASK_RUNNING)
|
||
|
|
{
|
||
|
|
m_lState = lRes;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (m_hEvent)
|
||
|
|
SetEvent(m_hEvent);
|
||
|
|
|
||
|
|
return S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP_(ULONG) CImgCtxThumb::IsRunning()
|
||
|
|
{
|
||
|
|
return m_lState;
|
||
|
|
}
|
||
|
|
|
||
|
|
STDMETHODIMP CImgCtxThumb::InternalResume()
|
||
|
|
{
|
||
|
|
if (m_phBmp == NULL)
|
||
|
|
{
|
||
|
|
return E_UNEXPECTED;
|
||
|
|
}
|
||
|
|
|
||
|
|
m_lState = IRTIR_TASK_RUNNING;
|
||
|
|
|
||
|
|
HRESULT hr = S_OK;
|
||
|
|
if (!m_pImg)
|
||
|
|
{
|
||
|
|
hr = CoCreateInstance(CLSID_IImgCtx, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARG(IImgCtx, &m_pImg));
|
||
|
|
ASSERT(SUCCEEDED(hr));
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
ASSERT(m_pImg);
|
||
|
|
|
||
|
|
hr = m_pImg->Load(m_szPath, DWN_RAWIMAGE | m_dwRecClrDepth);
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
hr = m_pImg->SetCallback(OnImgCtxChange, this);
|
||
|
|
}
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
hr = m_pImg->SelectChanges(IMGCHG_COMPLETE, 0, TRUE);
|
||
|
|
}
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
ATOMICRELEASE(m_pImg);
|
||
|
|
m_lState = IRTIR_TASK_FINISHED;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
m_lState = IRTIR_TASK_FINISHED;
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ULONG fState;
|
||
|
|
SIZE rgSize;
|
||
|
|
|
||
|
|
m_pImg->GetStateInfo(&fState, &rgSize, TRUE);
|
||
|
|
|
||
|
|
if (!(fState & IMGLOAD_COMPLETE))
|
||
|
|
{
|
||
|
|
do
|
||
|
|
{
|
||
|
|
DWORD dwRet = MsgWaitForMultipleObjects(1, &m_hEvent, FALSE, INFINITE, QS_ALLINPUT);
|
||
|
|
|
||
|
|
if (dwRet != WAIT_OBJECT_0)
|
||
|
|
{
|
||
|
|
// check the event anyway, msgs get checked first, so
|
||
|
|
// it could take a while for this to get fired otherwise..
|
||
|
|
dwRet = WaitForSingleObject(m_hEvent, 0);
|
||
|
|
}
|
||
|
|
if (dwRet == WAIT_OBJECT_0)
|
||
|
|
{
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
MSG msg;
|
||
|
|
// empty the message queue...
|
||
|
|
while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
|
||
|
|
{
|
||
|
|
if ((msg.message >= WM_KEYFIRST && msg.message <= WM_KEYLAST) ||
|
||
|
|
(msg.message >= WM_MOUSEFIRST && msg.message <= WM_MOUSELAST && msg.message != WM_MOUSEMOVE))
|
||
|
|
{
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
TranslateMessage(&msg);
|
||
|
|
DispatchMessage(&msg);
|
||
|
|
}
|
||
|
|
} while (TRUE);
|
||
|
|
|
||
|
|
// check why we broke out...
|
||
|
|
if (m_lState == IRTIR_TASK_PENDING)
|
||
|
|
{
|
||
|
|
m_lState = IRTIR_TASK_FINISHED;
|
||
|
|
m_pImg->Disconnect();
|
||
|
|
ATOMICRELEASE(m_pImg);
|
||
|
|
return E_FAIL;
|
||
|
|
}
|
||
|
|
if (m_lState == IRTIR_TASK_SUSPENDED)
|
||
|
|
return E_PENDING;
|
||
|
|
m_pImg->GetStateInfo(&fState, &rgSize, TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
hr = (fState & IMGLOAD_ERROR) ? E_FAIL : S_OK;
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
HDC hdc = GetDC(NULL);
|
||
|
|
// LINTASSERT(hdc || !hdc); // 0 semi-ok
|
||
|
|
void *lpBits;
|
||
|
|
|
||
|
|
HDC hdcBmp = CreateCompatibleDC(hdc);
|
||
|
|
if (hdcBmp && hdc)
|
||
|
|
{
|
||
|
|
struct {
|
||
|
|
BITMAPINFOHEADER bi;
|
||
|
|
DWORD ct[256];
|
||
|
|
} dib;
|
||
|
|
|
||
|
|
dib.bi.biSize = sizeof(BITMAPINFOHEADER);
|
||
|
|
// On NT5 we go directly to the thumbnail with StretchBlt
|
||
|
|
// on other OS's we make a full size copy and pass the bits
|
||
|
|
// to ScaleSharpen2().
|
||
|
|
if (IsOS(OS_WIN2000ORGREATER))
|
||
|
|
{
|
||
|
|
dib.bi.biWidth = m_rgSize.cx;
|
||
|
|
dib.bi.biHeight = m_rgSize.cy;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
dib.bi.biWidth = rgSize.cx;
|
||
|
|
dib.bi.biHeight = rgSize.cy;
|
||
|
|
}
|
||
|
|
dib.bi.biPlanes = 1;
|
||
|
|
dib.bi.biBitCount = (WORD) m_dwRecClrDepth;
|
||
|
|
dib.bi.biCompression = BI_RGB;
|
||
|
|
dib.bi.biSizeImage = 0;
|
||
|
|
dib.bi.biXPelsPerMeter = 0;
|
||
|
|
dib.bi.biYPelsPerMeter = 0;
|
||
|
|
dib.bi.biClrUsed = (m_dwRecClrDepth <= 8) ? (1 << m_dwRecClrDepth) : 0;
|
||
|
|
dib.bi.biClrImportant = 0;
|
||
|
|
|
||
|
|
HPALETTE hpal = NULL;
|
||
|
|
HPALETTE hpalOld = NULL;
|
||
|
|
|
||
|
|
if (m_dwRecClrDepth <= 8)
|
||
|
|
{
|
||
|
|
if (m_dwRecClrDepth == 8)
|
||
|
|
{
|
||
|
|
// need to get the right palette....
|
||
|
|
hr = m_pImg->GetPalette(& hpal);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
hpal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (SUCCEEDED(hr) && hpal)
|
||
|
|
{
|
||
|
|
hpalOld = SelectPalette(hdcBmp, hpal, TRUE);
|
||
|
|
// LINTASSERT(hpalOld || !hpalOld); // 0 semi-ok for SelectPalette
|
||
|
|
RealizePalette(hdcBmp);
|
||
|
|
|
||
|
|
int n = GetPaletteEntries(hpal, 0, 256, (LPPALETTEENTRY)&dib.ct[0]);
|
||
|
|
|
||
|
|
ASSERT(n >= (int) dib.bi.biClrUsed);
|
||
|
|
for (int i = 0; i < (int)dib.bi.biClrUsed; i ++)
|
||
|
|
dib.ct[i] = RGB(GetBValue(dib.ct[i]),GetGValue(dib.ct[i]),GetRValue(dib.ct[i]));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
HBITMAP hBmp = CreateDIBSection(hdcBmp, (LPBITMAPINFO)&dib, DIB_RGB_COLORS, &lpBits, NULL, 0);
|
||
|
|
if (hBmp != NULL)
|
||
|
|
{
|
||
|
|
HGDIOBJ hOld = SelectObject(hdcBmp, hBmp);
|
||
|
|
|
||
|
|
// On NT5 Go directly to the Thumbnail with StretchBlt()
|
||
|
|
if (IsOS(OS_WIN2000ORGREATER))
|
||
|
|
{
|
||
|
|
// Compute output size of thumbnail
|
||
|
|
RECT rectThumbnail;
|
||
|
|
rectThumbnail.left = 0;
|
||
|
|
rectThumbnail.top = 0;
|
||
|
|
|
||
|
|
rectThumbnail.right = m_rgSize.cx;
|
||
|
|
rectThumbnail.bottom = m_rgSize.cy;
|
||
|
|
|
||
|
|
FillRect(hdcBmp, &rectThumbnail, (HBRUSH) (COLOR_WINDOW+1));
|
||
|
|
rectThumbnail.right = rgSize.cx;
|
||
|
|
rectThumbnail.bottom = rgSize.cy;
|
||
|
|
|
||
|
|
CalculateAspectRatio (&m_rgSize, &rectThumbnail);
|
||
|
|
|
||
|
|
// Call DanielC for the StretchBlt
|
||
|
|
SetStretchBltMode (hdcBmp, HALFTONE);
|
||
|
|
|
||
|
|
// Create the thumbnail
|
||
|
|
m_pImg->StretchBlt(hdcBmp,
|
||
|
|
rectThumbnail.left,
|
||
|
|
rectThumbnail.top,
|
||
|
|
rectThumbnail.right - rectThumbnail.left,
|
||
|
|
rectThumbnail.bottom - rectThumbnail.top,
|
||
|
|
0, 0,
|
||
|
|
rgSize.cx,
|
||
|
|
rgSize.cy,
|
||
|
|
SRCCOPY);
|
||
|
|
|
||
|
|
SelectObject(hdcBmp, hOld);
|
||
|
|
|
||
|
|
*m_phBmp = hBmp;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// On systems other than NT5 make a full size copy of
|
||
|
|
// the bits and pass the copy to ScaleSharpen2().
|
||
|
|
//
|
||
|
|
RECT rectThumbnail;
|
||
|
|
rectThumbnail.left = 0;
|
||
|
|
rectThumbnail.top = 0;
|
||
|
|
|
||
|
|
rectThumbnail.right = rgSize.cx;
|
||
|
|
rectThumbnail.bottom = rgSize.cy;
|
||
|
|
|
||
|
|
FillRect(hdcBmp, &rectThumbnail, (HBRUSH) (COLOR_WINDOW+1));
|
||
|
|
|
||
|
|
m_pImg->StretchBlt(hdcBmp,
|
||
|
|
0, 0,
|
||
|
|
rgSize.cx,
|
||
|
|
rgSize.cy,
|
||
|
|
0, 0,
|
||
|
|
rgSize.cx,
|
||
|
|
rgSize.cy,
|
||
|
|
SRCCOPY);
|
||
|
|
|
||
|
|
SelectObject(hdcBmp, hOld);
|
||
|
|
|
||
|
|
if (m_rgSize.cx == rgSize.cx && m_rgSize.cy == rgSize.cy)
|
||
|
|
{
|
||
|
|
*m_phBmp = hBmp;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
SIZEL rgCur;
|
||
|
|
rgCur.cx = rgSize.cx;
|
||
|
|
rgCur.cy = rgSize.cy;
|
||
|
|
|
||
|
|
IScaleAndSharpenImage2 * pScale;
|
||
|
|
hr = CoCreateInstance(CLSID_ThumbnailScaler, NULL, CLSCTX_INPROC_SERVER,
|
||
|
|
IID_PPV_ARG(IScaleAndSharpenImage2, &pScale));
|
||
|
|
if (SUCCEEDED(hr))
|
||
|
|
{
|
||
|
|
hr = pScale->ScaleSharpen2((BITMAPINFO *) &dib,
|
||
|
|
lpBits,
|
||
|
|
m_phBmp,
|
||
|
|
&m_rgSize,
|
||
|
|
m_dwRecClrDepth,
|
||
|
|
hpal,
|
||
|
|
20, m_fOrigSize);
|
||
|
|
pScale->Release();
|
||
|
|
}
|
||
|
|
DeleteObject(hBmp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (SUCCEEDED(hr) && hpal && m_dwRecClrDepth <= 8)
|
||
|
|
{
|
||
|
|
(void) SelectPalette(hdcBmp, hpalOld, TRUE);
|
||
|
|
RealizePalette(hdcBmp);
|
||
|
|
}
|
||
|
|
if (m_dwRecClrDepth < 8)
|
||
|
|
{
|
||
|
|
// we used a stock 16 colour palette
|
||
|
|
DeletePalette(hpal);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (hdc)
|
||
|
|
{
|
||
|
|
ReleaseDC(NULL, hdc);
|
||
|
|
}
|
||
|
|
if (hdcBmp)
|
||
|
|
{
|
||
|
|
DeleteDC(hdcBmp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
m_pImg->Disconnect();
|
||
|
|
ATOMICRELEASE(m_pImg);
|
||
|
|
|
||
|
|
m_lState = IRTIR_TASK_FINISHED;
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|