Function ReadImageProperty

Explorer++/Helper/Helper.cpp:364–435

}

BOOL ReadImageProperty(const TCHAR *lpszImage, PROPID propId, TCHAR *szProperty, int cchMax)
{
	Gdiplus::GdiplusStartupInput gdiplusStartupInput;
	ULONG_PTR token;
	Gdiplus::Status status = GdiplusStartup(&token, &gdiplusStartupInput, NULL);

	if(status != Gdiplus::Ok)
	{
		return FALSE;
	}

	BOOL bSuccess = FALSE;

	/* This object needs to be
	deleted before GdiplusShutdown
	is called. If it were stack
	allocated, it would go out of
	scope _after_ the call to
	GdiplusShutdown. By allocating
	it on the heap, the lifetime
	can be directly controlled. */
	auto *image = new Gdiplus::Image(lpszImage, FALSE);

	if(image->GetLastStatus() == Gdiplus::Ok)
	{
		if(propId == PropertyTagImageWidth)
		{
			bSuccess = TRUE;
			StringCchPrintf(szProperty, cchMax, _T("%u pixels"), image->GetWidth());
		}
		else if(propId == PropertyTagImageHeight)
		{
			bSuccess = TRUE;
			StringCchPrintf(szProperty, cchMax, _T("%u pixels"), image->GetHeight());
		}
		else
		{
			UINT size = image->GetPropertyItemSize(propId);

			if(size != 0)
			{
				auto *propertyItem = reinterpret_cast<Gdiplus::PropertyItem *>(malloc(size));

				if(propertyItem != NULL)
				{
					status = image->GetPropertyItem(propId, size, propertyItem);

					if(status == Gdiplus::Ok)
					{
						if(propertyItem->type == PropertyTagTypeASCII)
						{
							int iRes = MultiByteToWideChar(CP_ACP, 0, reinterpret_cast<LPCSTR>(propertyItem->value), -1,
								szProperty, cchMax);

							if(iRes != 0)
							{
								bSuccess = TRUE;
							}