public static int[] Pack(ImageInfo imgInfo, int[] src, int[] dst, bool scale)
{
if (imgInfo is null)
{
throw new ArgumentNullException(nameof(imgInfo));
}
if (src is null)
{
throw new ArgumentNullException(nameof(src));
}
var len0 = imgInfo.SamplesPerRowPacked;
if (dst is null || dst.Length < len0)
{
dst = new int[len0];
}
if (imgInfo.Packed)
{
ImageLine.PackInplaceInt(imgInfo, src, dst, scale);
}
else
{
Array.Copy(src, 0, dst, 0, len0);
}
return(dst);
}
private void EncodeRowFromInt(int[] row)
{
if (row.Length == ImgInfo.SamplesPerRowPacked && !needsPack)
{
// some duplication of code - because this case is typical and it works faster this way
var j = 1;
if (ImgInfo.BitDepth <= 8)
{
foreach (var x in row)
{ // optimized
rowb[j++] = (byte)x;
}
}
else
{ // 16 bitspc
foreach (var x in row)
{ // optimized
rowb[j++] = (byte)(x >> 8);
rowb[j++] = (byte)(x);
}
}
}
else
{
// perhaps we need to pack?
if (row.Length >= ImgInfo.SamplesPerRow && needsPack)
{
ImageLine.PackInplaceInt(ImgInfo, row, row, false); // row is packed in place!
}
if (ImgInfo.BitDepth <= 8)
{
for (int i = 0, j = 1; i < ImgInfo.SamplesPerRowPacked; i++)
{
rowb[j++] = (byte)(row[i]);
}
}
else
{ // 16 bitspc
for (int i = 0, j = 1; i < ImgInfo.SamplesPerRowPacked; i++)
{
rowb[j++] = (byte)(row[i] >> 8);
rowb[j++] = (byte)(row[i]);
}
}
}
}
