public static unsafe void CopyPixels <TSrcPixel, TDstPixel>(SpanBitmap <TSrcPixel> src, Image <TDstPixel> dst)
where TSrcPixel : unmanaged
where TDstPixel : unmanaged, IPixel <TDstPixel>
{
if (dst == null)
{
throw new ArgumentNullException(nameof(dst));
}
if (src.Width != dst.Width || src.Height != dst.Height)
{
throw new ArgumentException("dimensions mismatch", nameof(dst));
}
if (sizeof(TSrcPixel) != sizeof(TDstPixel))
{
throw new ArgumentException("Pixel size mismatch", typeof(TDstPixel).Name);
}
src = src.AsReadOnly();
for (int y = 0; y < dst.Height; y++)
{
var srcRow = src.GetScanlinePixels(y);
var dstRow = dst.DangerousGetPixelRowMemory(y).Span;
MEMORYMARSHALL
.Cast <TSrcPixel, TDstPixel>(srcRow)
.CopyTo(dstRow);
}
}
public static TResult ReadAsSpanBitmap <TSelfPixel, TOtherPixel, TResult>(Image <TSelfPixel> self, SpanBitmap <TOtherPixel> other, SpanBitmap <TOtherPixel> .Function2 <TResult> function)
where TSelfPixel : unmanaged, IPixel <TSelfPixel>
where TOtherPixel : unmanaged
{
if (self == null)
{
throw new ArgumentNullException(nameof(self));
}
if (!TryGetExactPixelFormat <TSelfPixel>(out var otherFmt))
{
throw new NotImplementedException($"{typeof(TSelfPixel)}");
}
if (self.DangerousTryGetSinglePixelMemory(out Memory <TSelfPixel> selfMem))
{
var selfBytes = MEMORYMARSHALL.Cast <TSelfPixel, Byte>(selfMem.Span);
var selfBmp = new SpanBitmap <TOtherPixel>(selfBytes, self.Width, self.Height, otherFmt);
return(function(selfBmp.AsReadOnly(), other));
}
else
{
var tempBmp = ImageSharpToolkit
.ToMemoryBitmap <TOtherPixel>(self)
.AsSpanBitmap()
.AsReadOnly();
return(function(tempBmp, other));
}
}
public static unsafe BitmapSampler <TPixel> From(SpanTensor2 <TPixel> tensor, ColorEncoding encoding)
{
var w = tensor.BitmapSize.Width;
var h = tensor.BitmapSize.Height;
var b = MMARSHALL.Cast <TPixel, byte>(tensor.Span);
var e = encoding;
return(new BitmapSampler <TPixel>(b, w * sizeof(TPixel), w, h, e));
}
public static void Split(ReadOnlySpan <float> span, out ReadOnlySpan <Vector4> span4, out ReadOnlySpan <float> span1)
{
var len = span.Length / 4;
span4 = MEMMARSHALL.Cast <float, Vector4>(span.Slice(0, len));
len *= 4;
span1 = MEMMARSHALL.Cast <float, float>(span).Slice(len);
}
public static void CopyPixels <TSrcPixel>(Image <TSrcPixel> src, SpanBitmap dst)
where TSrcPixel : unmanaged, IPixel <TSrcPixel>
{
for (int y = 0; y < dst.Height; y++)
{
var srcRow = src.DangerousGetPixelRowMemory(y).Span;
var dstRow = dst.UseScanlineBytes(y);
MEMORYMARSHALL
.Cast <TSrcPixel, Byte>(srcRow)
.CopyTo(dstRow);
}
}
public static void CopyPixels <TDstPixel>(SpanBitmap src, Image <TDstPixel> dst)
where TDstPixel : unmanaged, IPixel <TDstPixel>
{
src = src.AsReadOnly();
for (int y = 0; y < dst.Height; y++)
{
var srcRow = src.GetScanlineBytes(y);
var dstRow = dst.DangerousGetPixelRowMemory(y).Span;
MEMORYMARSHALL
.Cast <Byte, TDstPixel>(srcRow)
.CopyTo(dstRow);
}
}
public static unsafe bool TryWrapAsSpanBitmap <TSrcPixel, TDstPixel>(Image <TSrcPixel> src, SpanBitmap <TDstPixel> .Action1 action)
where TSrcPixel : unmanaged, IPixel <TSrcPixel>
where TDstPixel : unmanaged
{
if (src == null)
{
throw new ArgumentNullException(nameof(src));
}
if (TryGetExactPixelFormat <TSrcPixel>(out var pfmt))
{
if (src.DangerousTryGetSinglePixelMemory(out Memory <TSrcPixel> srcSpan))
{
var span = MEMORYMARSHALL.Cast <TSrcPixel, Byte>(srcSpan.Span);
var bmp = new SpanBitmap <TDstPixel>(span, src.Width, src.Height, pfmt);
action(bmp);
return(true);
}
}
return(false);
}
public static unsafe void WriteAsSpanBitmap <TSelfPixel, TOtherPixel>(Image <TSelfPixel> self, SpanBitmap <TOtherPixel> other, SpanBitmap <TOtherPixel> .Action2 action)
where TSelfPixel : unmanaged, IPixel <TSelfPixel>
where TOtherPixel : unmanaged
{
if (self == null)
{
throw new ArgumentNullException(nameof(self));
}
if (sizeof(TSelfPixel) != sizeof(TOtherPixel))
{
throw new ArgumentException("pixel size mismatch", typeof(TOtherPixel).Name);
}
other = other.AsReadOnly();
if (!TryGetExactPixelFormat <TSelfPixel>(out var otherFmt))
{
otherFmt = PixelFormat.TryIdentifyFormat <TOtherPixel>();
}
if (self.DangerousTryGetSinglePixelMemory(out Memory <TSelfPixel> selfMem))
{
var selfBytes = MEMORYMARSHALL.Cast <TSelfPixel, Byte>(selfMem.Span);
var selfBmp = new SpanBitmap <TOtherPixel>(selfBytes, self.Width, self.Height, otherFmt);
action(selfBmp, other);
}
else
{
var tempBmp = new MemoryBitmap <TOtherPixel>(self.Width, self.Height, otherFmt);
CopyPixels(self, tempBmp);
action(tempBmp, other);
CopyPixels(tempBmp, self);
}
}
public static ObjectType FromRawData(Span <uint> values)
{
var wordSpan = MemoryMarshal.Cast <uint, ushort>(values);
return(new ObjectType(wordSpan[0], wordSpan[1] != 0));
}
public sealed override int Read()
{
var result = default(char);
return(Read(MemoryMarshal.CreateSpan(ref result, 1)) > 0 ? result : InvalidChar);
}
