HRESULT CMainWindow::FindImages()
{
HRESULT hr = S_OK;
if (m_thumbs == NULL)
{
// Walk the Pictures library
IShellItem *pShellItemPicturesLibrary;
hr = SHGetKnownFolderItem(
FOLDERID_PicturesLibrary,
KF_FLAG_CREATE,
NULL,
IID_PPV_ARGS(&pShellItemPicturesLibrary)
);
if (SUCCEEDED(hr))
{
INamespaceWalk *pNamespaceWalk;
hr = CoCreateInstance(
CLSID_NamespaceWalker,
NULL,
CLSCTX_INPROC,
IID_PPV_ARGS(&pNamespaceWalk)
);
if (SUCCEEDED(hr))
{
hr = pNamespaceWalk->Walk(
pShellItemPicturesLibrary,
NSWF_NONE_IMPLIES_ALL,
1,
NULL
);
if (SUCCEEDED(hr))
{
// Retrieve the array of PIDLs gathered in the walk
UINT itemCount;
PIDLIST_ABSOLUTE *ppidls;
hr = pNamespaceWalk->GetIDArrayResult(
&itemCount,
&ppidls
);
if (SUCCEEDED(hr))
{
// Create the uninitialized thumbnails
m_thumbs = new CThumbnail[itemCount];
// Get the bitmap for each item and initialize the corresponding thumbnail object
for (UINT i = 0; i < itemCount; i++)
{
IShellItem *pShellItem;
hr = SHCreateItemFromIDList(
ppidls[i],
IID_PPV_ARGS(&pShellItem)
);
if (SUCCEEDED(hr))
{
ID2D1Bitmap *pBitmap;
hr = DecodeImageFromThumbCache(
pShellItem,
&pBitmap
);
if (SUCCEEDED(hr))
{
hr = m_thumbs[m_uThumbCount].Initialize(
pBitmap,
m_pAnimationManager,
m_pRenderTarget->GetSize().width * 0.5,
m_pRenderTarget->GetSize().height * 0.5
);
if (SUCCEEDED(hr))
{
m_uThumbCount++;
}
pBitmap->Release();
}
pShellItem->Release();
}
}
// The calling function is responsible for freeing the PIDL array
FreeIDListArray(ppidls, itemCount);
if (SUCCEEDED(hr))
{
// Arrange the images when they are first loaded
m_pLayoutManager = new CLayoutManager();
hr = m_pLayoutManager->Initialize(
m_pAnimationManager,
m_pAnimationTimer,
m_pTransitionLibrary,
m_uThumbCount,
m_thumbs
);
if (SUCCEEDED(hr))
{
hr = m_pLayoutManager->Resize(
m_pRenderTarget->GetSize()
);
}
}
}
}
pNamespaceWalk->Release();
}
pShellItemPicturesLibrary->Release();
}
}
return hr;
}
static HRESULT GetScaledBitmap(LPWSTR pszFilename,
HBITMAP &hBitmap,
int cXY) {
HRESULT hr = S_OK;
// Walk the Pictures library
IShellItem* pShellItem;
hr = SHCreateItemFromParsingName(pszFilename,
NULL,
IID_PPV_ARGS(&pShellItem));
if (SUCCEEDED(hr)) {
INamespaceWalk* pNamespaceWalk;
hr = CoCreateInstance(CLSID_NamespaceWalker,
NULL,
CLSCTX_INPROC,
IID_PPV_ARGS(&pNamespaceWalk));
if (SUCCEEDED(hr)) {
hr = pNamespaceWalk->Walk(pShellItem,
NSWF_NONE_IMPLIES_ALL,
1,
NULL);
if (SUCCEEDED(hr)) {
// Retrieve the array of PIDLs gathered in the walk
UINT itemCount;
PIDLIST_ABSOLUTE* ppidls;
hr = pNamespaceWalk->GetIDArrayResult(&itemCount, &ppidls);
if (SUCCEEDED(hr)) {
// Create the uninitialized thumbnails
// Get the bitmap for each item and initialize the corresponding thumbnail object
for (UINT i = 0; i < itemCount; i++) {
IShellItem* pShellItem;
hr = SHCreateItemFromIDList(ppidls[i], IID_PPV_ARGS(&pShellItem));
if (SUCCEEDED(hr)) {
hr = DecodeImageFromThumbCache(pShellItem, hBitmap, cXY);
pShellItem->Release();
}
}
// The calling function is responsible for freeing the PIDL array
FreeIDListArray(ppidls, itemCount);
} else {
LOG_ERROR("Failed to walk to get the array of PIDLs, result = %d", hr);
}
} else {
LOG_ERROR("Failed to walk to the shell item, result = %d", hr);
}
pNamespaceWalk->Release();
} else {
LOG_ERROR("Failed to create instance of INamespaceWalk, result = %d", hr);
}
pShellItem->Release();
} else {
LOG_ERROR("Failed to create instance of IShellItem, result = %d", hr);
}
return hr;
}
