private static async Task <Palette> AsyncTask(PixelBuffer pixelBuffer, Rectangle region, PaletteGeneratedEventHandler paletteGeneratedEventHandler)
{
if (paletteGeneratedEventHandler == null)
{
throw new ArgumentNullException(nameof(paletteGeneratedEventHandler), "PaletteGeneratedEventHandlergate should not be null.");
}
var GenerateTask = Task.Run(() =>
{
return(Generate(pixelBuffer, region));
}).ConfigureAwait(false);
Palette ret = await GenerateTask;
paletteGeneratedEventHandler(ret);
return(null);;
}
public static PixelBuffer LoadImageFromBuffer(System.IO.Stream stream, Size2D size)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
if (size == null)
{
throw new ArgumentNullException(nameof(size));
}
long streamLength = stream.Length - stream.Position;
if (streamLength <= 0)
{
throw new InvalidOperationException("stream lenght is <= 0");
}
// Read data from stream
byte[] streamData = new byte[streamLength];
stream.Read(streamData, 0, (int)streamLength);
// Allocate buffer that internal DALi engine can read
VectorUnsignedChar buffer = new VectorUnsignedChar();
buffer.Resize((uint)streamLength);
var bufferBegin = buffer.Begin();
global::System.Runtime.InteropServices.HandleRef bufferRef = SWIGTYPE_p_unsigned_char.getCPtr(bufferBegin);
// Copy data from stream to buffer
System.Runtime.InteropServices.Marshal.Copy(streamData, 0, bufferRef.Handle, (int)streamLength);
var uSize = new Uint16Pair((uint)size.Width, (uint)size.Height);
PixelBuffer ret = new PixelBuffer(Interop.ImageLoading.LoadImageFromBuffer(VectorUnsignedChar.getCPtr(buffer), Uint16Pair.getCPtr(uSize)), true);
uSize.Dispose();
buffer.Dispose();
if (NDalicPINVOKE.SWIGPendingException.Pending)
{
throw NDalicPINVOKE.SWIGPendingException.Retrieve();
}
return(ret);
}
/// <summary>
/// Scale the bitmap down so that it's smallest dimension is
/// calculateBitmapMinDimensionpx. If bitmap is smaller than this, than it
/// is returned.
/// </summary>
private static bool ScaleBitmapDown(PixelBuffer pixelBuffer)
{
int minDimension = Math.Min((int)pixelBuffer.GetWidth(), (int)pixelBuffer.GetHeight());
if (minDimension <= calculateBitmapMinDimension)
{
// If the bitmap is small enough already, just return it
return(false);
}
float scaleRatio = calculateBitmapMinDimension / (float)minDimension;
int width = (int)Math.Round((int)pixelBuffer.GetWidth() * scaleRatio);
int height = (int)Math.Round((int)pixelBuffer.GetHeight() * scaleRatio);
Tizen.Log.Info("Palette", "pixelBuffer resize to " + width + " " + height + "\n");
pixelBuffer.Resize((ushort)width, (ushort)height);
return(true);
}
public static PixelBuffer DownloadImageSynchronously(Uri uri, Size2D size)
{
if (null == size)
{
throw new ArgumentNullException(nameof(size));
}
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
var uSize = new Uint16Pair((uint)size.Width, (uint)size.Height);
PixelBuffer ret = new PixelBuffer(Interop.ImageLoading.DownloadImageSynchronously(uri.AbsoluteUri, Uint16Pair.getCPtr(uSize)), true);
uSize.Dispose();
if (NDalicPINVOKE.SWIGPendingException.Pending)
{
throw NDalicPINVOKE.SWIGPendingException.Retrieve();
}
return(ret);
}
public static PixelBuffer LoadImageFromFile(Uri uri, Size2D size, FittingModeType fittingMode, SamplingModeType samplingMode)
{
if (null == size)
{
throw new ArgumentNullException(nameof(size));
}
if (uri == null)
{
throw new ArgumentNullException(nameof(uri));
}
var uSize = new Uint16Pair((uint)size.Width, (uint)size.Height);
PixelBuffer ret = new PixelBuffer(Interop.ImageLoading.LoadImageFromFile(uri.AbsoluteUri, Uint16Pair.getCPtr(uSize), (int)fittingMode, (int)samplingMode), true);
if (NDalicPINVOKE.SWIGPendingException.Pending)
{
throw NDalicPINVOKE.SWIGPendingException.Retrieve();
}
uSize.Dispose();
return(ret);
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(PixelBuffer obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}
internal PixelBuffer Assign(PixelBuffer rhs)
{
PixelBuffer ret = new PixelBuffer(NDalicPINVOKE.PixelBuffer_Assign(swigCPtr, PixelBuffer.getCPtr(rhs)), false);
if (NDalicPINVOKE.SWIGPendingException.Pending)
{
throw NDalicPINVOKE.SWIGPendingException.Retrieve();
}
return(ret);
}
internal PixelBuffer(PixelBuffer handle) : this(NDalicPINVOKE.new_PixelBuffer__SWIG_1(PixelBuffer.getCPtr(handle)), true)
{
if (NDalicPINVOKE.SWIGPendingException.Pending)
{
throw NDalicPINVOKE.SWIGPendingException.Retrieve();
}
}
public static Palette generate(PixelBuffer pixelBuffer)
{
return(Generate(pixelBuffer, null));
}
public static void GenerateAsync(PixelBuffer pixelBuffer, Tizen.NUI.Rectangle region, PaletteGeneratedEventHandler paletteGeneratedEventHandler)
{
_ = AsyncTask(pixelBuffer, region, paletteGeneratedEventHandler);
}
public static void GenerateAsync(PixelBuffer pixelBuffer, PaletteGeneratedEventHandler paletteGeneratedEventHandler)
{
_ = AsyncTask(pixelBuffer, null, paletteGeneratedEventHandler);
}