public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
try
{
string param = parameter?.ToString();
if ((Device.OS == TargetPlatform.iOS) && !string.IsNullOrWhiteSpace(param))
{
string[] imageData = param.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
if (imageData?.Length > 0)
{
string imagePath = imageData[0];
string imageExtension = (imageData.Length > 1) ? imageData[1] : "png";
IDeviceInfo deviceInfo = DependencyService.Get <IDeviceInfo>();
if (deviceInfo != null)
{
Size fullScreen = deviceInfo.GetFullScreenSize();
double screenHeight = fullScreen.Height;
if (Device.Idiom == TargetIdiom.Phone)
{
if (screenHeight >= 2208)
{
return(imagePath + "-736h@3x." + imageExtension);
}
else if (screenHeight >= 1334)
{
return(imagePath + "-667h@2x." + imageExtension);
}
else if (screenHeight >= 1136)
{
return(imagePath + "-568h@2x." + imageExtension);
}
else
{
return(imagePath + "@2x." + imageExtension);
}
}
else if (Device.Idiom == TargetIdiom.Tablet)
{
if (deviceInfo.GetScreenOrientation() == Model.DeviceOrientation.Portrait)
{
if (screenHeight >= 2048)
{
return(imagePath + "-Portrait@2x." + imageExtension);
}
else
{
return(imagePath + "-Portrait." + imageExtension);
}
}
else
{
if (fullScreen.Width >= 2208)
{
return(imagePath + "-Landscape@3x." + imageExtension);
}
else if (fullScreen.Width >= 2048)
{
return(imagePath + "-Landscape@2x." + imageExtension);
}
else
{
return(imagePath + "-Landscape." + imageExtension);
}
}
}
}
}
}
else if ((Device.OS == TargetPlatform.Android) && !string.IsNullOrWhiteSpace(param))
{
IDeviceInfo deviceInfo = DependencyService.Get <IDeviceInfo>();
if (deviceInfo != null)
{
Size fullScreen = deviceInfo.GetFullScreenSize();
double screenHeight = fullScreen.Height;
if (Device.Idiom == TargetIdiom.Phone)
{
if (deviceInfo.GetScreenOrientation() == Model.DeviceOrientation.Portrait)
{
return("backgroundimage.jpg");
}
else
{
return("backgroundimagelandscape.jpg");
}
}
else if (Device.Idiom == TargetIdiom.Tablet)
{
if (deviceInfo.GetScreenOrientation() == Model.DeviceOrientation.Portrait)
{
return("backgroundimage.jpg");
}
else
{
return("backgroundimagelandscape.jpg");
}
}
}
return("backgroundimage.jpg");
}
}
catch
{
}
return(null);
}