private MLResult InternalGetThumbnail(long entryId, out Texture2D imageThumbnail)
{
imageThumbnail = null;
if (!_watchHistory.ContainsKey(entryId))
{
return(MLResult.Create(MLResult.Code.InvalidParam, "Unknown entry Id"));
}
var thumbnail = new MLImageNativeBindings.MLImageNative();
MLResult.Code resultCode = MLScreensNativeBindings.MLScreensGetWatchHistoryThumbnail(entryId, ref thumbnail);
var result = MLResult.Create(resultCode);
if (!result.IsOk)
{
return(result);
}
imageThumbnail =
new Texture2D((int)thumbnail.Width,
(int)thumbnail.Height,
TextureFormat.RGB24,
false,
true);
imageThumbnail.LoadRawTextureData(thumbnail.Image,
(int)(thumbnail.Height * thumbnail.Width) * RGBBytesPerPixel);
resultCode = MLScreensNativeBindings.MLScreensReleaseWatchHistoryThumbnail(ref thumbnail);
result = MLResult.Create(resultCode);
return(result);
}
private static MLImageNativeBindings.MLImageNative CreateGrayThumbnailImage()
{
byte[] imageData = Enumerable.Repeat(DefaultThumbnailIntensityValue, DefaultThumbnailWidth * DefaultThumbnailHeight * RGBBytesPerPixel).ToArray();
var thumbnail = new MLImageNativeBindings.MLImageNative
{
ImageType = MLImageNativeBindings.MLImageType.RGB24,
Alignment = 1,
Width = DefaultThumbnailWidth,
Height = DefaultThumbnailHeight,
Image = Marshal.AllocHGlobal(imageData.Length)
};
Marshal.Copy(imageData, 0, thumbnail.Image, imageData.Length);
return(thumbnail);
}
/// Note: this function expects thumbnailImage to be 24-bit
private MLImageNativeBindings.MLImageNative CreateThumbnailImage(Texture2D thumbnailImage)
{
// TODO: Change alignment to 4 and modify ConvertToByteArray to account for that.
byte[] imageData = MLTextureUtils.ConvertToByteArray(thumbnailImage, out int numChannels);
var thumbnail = new MLImageNativeBindings.MLImageNative
{
ImageType = MLImageNativeBindings.MLImageType.RGB24,
Alignment = 1,
Width = (uint)thumbnailImage.width,
Height = (uint)thumbnailImage.height,
Image = Marshal.AllocHGlobal(imageData.Length)
};
Marshal.Copy(imageData, 0, thumbnail.Image, imageData.Length);
return(thumbnail);
}
private MLResult InternalUpdateWatchHistory(MLScreensWatchHistoryEntry entry, Texture2D thumbnailImage)
{
if (!entry.IsValid)
{
return(MLResult.Create(MLResult.Code.InvalidParam, "Invalid entry parameter"));
}
if (!_watchHistory.ContainsKey(entry.Id))
{
return(MLResult.Create(MLResult.Code.InvalidParam, "Unknown entry Id"));
}
if (thumbnailImage != null && thumbnailImage.format != TextureFormat.RGB24)
{
return(MLResult.Create(MLResult.Code.InvalidParam, "Invalid thumbnail parameter format"));
}
MLScreensNativeBindings.MLScreensWatchHistoryEntryNative nativeEntry = MLScreensNativeBindings.MLScreensWatchHistoryEntryNative.Create();
nativeEntry.Data = entry;
MLImageNativeBindings.MLImageNative thumbnail =
thumbnailImage == null ? _defaultGrayThumbnailImage : CreateThumbnailImage(thumbnailImage);
MLResult.Code resultCode = MLScreensNativeBindings.MLScreensUpdateWatchHistoryEntry(ref nativeEntry, ref thumbnail);
if (thumbnail.Image != IntPtr.Zero && thumbnail.Image != _defaultGrayThumbnailImage.Image)
{
Marshal.FreeHGlobal(thumbnail.Image);
}
Marshal.FreeHGlobal(nativeEntry.Title);
Marshal.FreeHGlobal(nativeEntry.Subtitle);
Marshal.FreeHGlobal(nativeEntry.CustomData);
var result = MLResult.Create(resultCode);
if (result.IsOk)
{
_watchHistory[entry.Id] = entry;
}
return(result);
}
/// <summary>
/// Starts the screens object requests, Must be called to receive screens data from
/// the underlying system
/// </summary>
protected override MLResult StartAPI()
{
MLResult.Code resultCode = MLScreensNativeBindings.MLScreensGetWatchHistoryList(ref _watchHistoryList);
var result = MLResult.Create(resultCode);
if (!result.IsOk)
{
MLPluginLog.ErrorFormat("MLScreens.StartAPI failed to retrieve saved screen information. Reason: {0}", result);
return(result);
}
PopulateWatchHistory();
resultCode = MLScreensNativeBindings.MLScreensReleaseWatchHistoryList(ref _watchHistoryList);
result = MLResult.Create(resultCode);
if (!result.IsOk)
{
MLPluginLog.ErrorFormat("MLScreens.StartAPI failed to clean screens data. Reason: {0}", result);
return(result);
}
_defaultGrayThumbnailImage = CreateGrayThumbnailImage();
return(result);
}