private ImageInfo Identify(IImagingConfig config, ImageBinReader reader)
{
var info = GetInfo(config, reader);
var readState = info.ReadState;
int comp = readState.Components;
int bitsPerComp = readState.Depth;
var vectorType = TryGetVectorType(comp, bitsPerComp);
var compInfo = vectorType.Type?.ComponentInfo ?? new VectorComponentInfo(new VectorComponent(
VectorComponentType.Undefined, VectorComponentChannel.Raw, comp * bitsPerComp));
return(new ImageInfo(readState.Width, readState.Height, compInfo, Format));
}
public StbImageDecoderBase(
IImagingConfig config, Stream stream, TOptions?decoderOptions)
{
ImagingConfig = config ?? throw new ArgumentNullException(nameof(config));
DecoderOptions = decoderOptions ?? new();
byte[] buffer = RecyclableMemoryManager.Default.GetBlock();
Reader = new ImageBinReader(stream, buffer);
ReadState = new ReadState()
{
StateReadyCallback = OnStateReady,
OutputPixelLineCallback = OnOutputPixelLine,
OutputPixelCallback = OnOutputPixel
};
}
public ImageInfo Identify(
IImagingConfig config, Stream stream, CancellationToken cancellationToken = default)
{
var buffer = RecyclableMemoryManager.Default.GetBlock();
try
{
using var reader = new ImageBinReader(stream, buffer);
reader.CancellationToken = cancellationToken;
return(Identify(config, reader));
}
finally
{
RecyclableMemoryManager.Default.ReturnBlock(buffer);
}
}
protected override InfoResult GetInfo(IImagingConfig config, ImageBinReader reader)
{
var tgaInfo = StbSharp.ImageRead.Tga.Info(reader, out var readState);
return(new InfoResult(readState));
}
protected abstract InfoResult GetInfo(IImagingConfig config, ImageBinReader reader);
