public static ushort[] LoadBuffer(string pathBase, int width, int height, int numberOfComponents)
{
string pathHigh = pathBase + ".high.png";
string pathLowDiff = pathBase + ".low-diff.png";
using var high = Image.Load <Rgba32>(pathHigh);
using var lowDiff = Image.Load <Rgba32>(pathLowDiff);
if (high.Width != width || high.Height != height || lowDiff.Width != width || lowDiff.Height != height)
{
throw new InvalidDataException();
}
Rgba32[] highPixels = new Rgba32[width * height];
Rgba32[] lowDiffPixels = new Rgba32[width * height];
for (int i = 0; i < height; i++)
{
high.GetPixelRowSpan(i).CopyTo(highPixels.AsSpan(width * i, width));
lowDiff.GetPixelRowSpan(i).CopyTo(lowDiffPixels.AsSpan(width * i, width));
}
ushort[] buffer = new ushort[width * height * 4];
CopyHighBits(highPixels, buffer, numberOfComponents);
CopyLowBits(lowDiffPixels, buffer, numberOfComponents);
ReversePrediction(buffer, numberOfComponents);
return(buffer);
}
public void TestJpegLibrary()
{
var decoder = new JpegDecoder();
decoder.SetInput(_inputBytes);
decoder.Identify();
int width = decoder.Width;
int height = decoder.Height;
Rgba32[] rgba = new Rgba32[width * height];
byte[] ycbcr = ArrayPool <byte> .Shared.Rent(3 *rgba.Length);
try
{
var outputWriter = new JpegBufferOutputWriter(decoder.Width, decoder.Height, 3, ycbcr);
decoder.SetOutputWriter(outputWriter);
decoder.Decode();
JpegYCbCrToRgbConverter.Shared.ConvertYCbCr8ToRgba32(ycbcr, MemoryMarshal.AsBytes(rgba.AsSpan()), decoder.Width * decoder.Height);
}
finally
{
ArrayPool <byte> .Shared.Return(ycbcr);
}
}
public void PublicMethods_ThrowIfDisposed()
{
var image = new Image <Rgba32>(Configuration.Default, 10, 10);
var frameCollection = image.Frames;
var rgba32Array = new Rgba32[0];
image.Dispose(); // this should invalidate underlying collection as well
Assert.Throws <ObjectDisposedException>(() => { var res = frameCollection.AddFrame((ImageFrame)null); });
Assert.Throws <ObjectDisposedException>(() => { var res = frameCollection.AddFrame(rgba32Array); });
Assert.Throws <ObjectDisposedException>(() => { var res = frameCollection.AddFrame((ImageFrame <Rgba32>)null); });
Assert.Throws <ObjectDisposedException>(() => { var res = frameCollection.AddFrame(rgba32Array.AsSpan()); });
Assert.Throws <ObjectDisposedException>(() => { var res = frameCollection.CloneFrame(default); });
