/// <summary>
/// Creates and returns a new Texture2D using the given raw image data.
/// </summary>
public static Texture2D TextureFormatter(ImageUtils.ImageInfo imageInfo)
{
#if UNITY_UWP
TextureFormat imageFormat;
switch (imageInfo.Format)
{
case BitmapPixelFormat.Bgra8:
imageFormat = TextureFormat.BGRA32;
break;
case BitmapPixelFormat.Rgba8:
imageFormat = TextureFormat.RGBA32;
break;
default:
// Reject image on unknown format.
// We could also return a placeholder image.
return(null);
}
#else
TextureFormat imageFormat = TextureFormat.BGRA32;
#endif
Texture2D image = new Texture2D(imageInfo.Width, imageInfo.Height, imageFormat, false);
image.LoadRawTextureData(imageInfo.DecompressedBytes);
image.Apply();
return(image);
}
/// <summary>
/// Fetches the resource at the given index from OneDrive, formats it into the
/// requested type using the given ContentFormatter and returns it to the callback function.
/// </summary>
/// <typeparam name="T">Type of the resource to create with the fetched data.</typeparam>
/// <param name="formatter">Function to use to convert the raw data into a resource of type T.</param>
/// <param name="callback">Function to which the created resource should be sent.</param>
protected override async Task GetResourceAt <T>(int resourceIndex, ContentFormatter <T> formatter, Action <T> callback)
{
// We fetch the children for the first time
// here since we can't do it in the constructor.
if (ResourceIds == null)
{
await FetchResourceIds();
}
string resourceId = GetResourceIdAt(resourceIndex);
if (string.IsNullOrWhiteSpace(resourceId))
{
Debug.LogError("The requested resource has a null ID.");
return;
}
byte[] resourceData = await oneDriveController.GetItemContentAsync(resourceId);
// Decompress bytes on a background thread.
ImageUtils.ImageInfo imageInfo = await ImageUtils.DecompressImageBytes(resourceData);
if (imageInfo.DecompressedBytes == null)
{
Debug.LogError("Failed to fetch the requested resource from OneDrive.");
return;
}
// EventQueueManager executes the given Action on the main thread.
// This is required for resource formatting (i.e. Texture2D.LoadImage()).
EventQueueManager.Instance?.Execute(() =>
{
T resource = formatter(imageInfo);
callback(resource);
});
}
