private Bitmap ReadRegion(SizeL location, int level, SizeL size)
{
Stopwatch sw = new Stopwatch();
sw.Start();
OpenSlide.TraceMsg("start ReadRegion " + level + "/" + location.Height + "_" + location.Width + ": " + GetBytesReadable(size.Width * size.Height * 3));
Bitmap bmp = new Bitmap((int)size.Width, (int)size.Height);
bmp.SetPixel(0, 0, Color.AliceBlue);
var bmpdata = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
OpenSlide.TraceMsg("bmp locked " + level + "/" + location.Height + "_" + location.Width);
unsafe
{
void *p = bmpdata.Scan0.ToPointer();
openslide_read_region(handle, p, location.Width, location.Height, level, size.Width, size.Height);
}
OpenSlide.TraceMsg("read finished " + level + "/" + location.Height + "_" + location.Width + ": " + GetBytesReadable(size.Width * size.Height * 3 / Math.Max(sw.ElapsedMilliseconds, 1)) + "/ms");
bmp.UnlockBits(bmpdata);
OpenSlide.TraceMsg("unlock bits " + level + "/" + location.Height + "_" + location.Width);
if (bmp.GetPixel(0, 0) == Color.Black)
{
var error = CheckForLastError();
if (error != null)
{
throw new ArgumentException($"error reading region loc:{location}, level:{level}, size:{size}" + error);
}
//else just a black image?
}
OpenSlide.TraceMsg("end ReadRegion " + level + "/" + location.Height + "_" + location.Width);
return(bmp);
}
private SKBitmap ReadRegion(SizeL location, int level, SizeL size)
{
Stopwatch sw = new Stopwatch();
sw.Start();
OpenSlide.TraceMsg("start ReadRegion " + level + "/" + location.Height + "_" + location.Width + ": " + GetBytesReadable(size.Width * size.Height * 3));
SKBitmap bmp = new SKBitmap((int)size.Width, (int)size.Height);
bmp.SetPixel(0, 0, SKColors.AliceBlue);
bmp.LockPixels();
var bmpdata = bmp.GetPixels();
OpenSlide.TraceMsg("bmp locked " + level + "/" + location.Height + "_" + location.Width);
unsafe
{
void *p = bmpdata.ToPointer();
Import.openslide_read_region(handle, p, location.Width, location.Height, level, size.Width, size.Height);
}
OpenSlide.TraceMsg("read finished " + level + "/" + location.Height + "_" + location.Width + ": " + GetBytesReadable(size.Width * size.Height * 3 / Math.Max(sw.ElapsedMilliseconds, 1)) + "/ms");
bmp.UnlockPixels();
OpenSlide.TraceMsg("unlock bits " + level + "/" + location.Height + "_" + location.Width);
if (bmp.GetPixel(0, 0) == SKColors.Black)
{
var error = CheckForLastError();
if (error != null)
{
throw new ArgumentException($"error reading region loc:{location}, level:{level}, size:{size}" + error);
}
//else just a black image?
}
OpenSlide.TraceMsg("end ReadRegion " + level + "/" + location.Height + "_" + location.Width);
return(bmp);
}
public MemoryStream GetTile(int level, long row, long col)
{
OpenSlide.TraceMsg("start gettile " + level + "/" + col + "_" + row);
if (level < 0 || level >= max_dz_level)
{
throw new ArgumentException($"wrong level level {level}, row {row}, col {col}");
}
if (t_dimensions[level].Width <= col || t_dimensions[level].Height <= row ||
0 > col || 0 > row)
{
throw new ArgumentException($"wrong address level {level}, row {row}, col {col}");
}
var os_level = os_level_for_dz_level[level];
//Calculate top/ left and bottom/ right overlap
var z_overlap_tl = new SizeL(col == 0 ? 0 : 1,
row == 0 ? 0 : 1);
var z_overlap_br = new SizeL(col == t_dimensions[level].Width ? 0 : 1,
row == t_dimensions[level].Height ? 0 : 1);
var z_size = new SizeL(Math.Min(TILE_DOWNSAMPLE, z_dimensions[level].Width - TILE_DOWNSAMPLE * col) + z_overlap_tl.Width + z_overlap_br.Width,
Math.Min(TILE_DOWNSAMPLE, z_dimensions[level].Height - TILE_DOWNSAMPLE * row) + z_overlap_tl.Height + z_overlap_br.Height);
if (z_size.Width < 0 || z_size.Height < 0)
{
throw new ArgumentException($"out of bounds level {level}, row {row}, col {col}");
}
var z_location = new SizeL(TILE_DOWNSAMPLE * col, TILE_DOWNSAMPLE * row);
var l_location = new System.Drawing.SizeF((float)l_z_downsamples[level] * (z_location.Width - z_overlap_tl.Width),
(float)l_z_downsamples[level] * (z_location.Height - z_overlap_tl.Height));
//Round location down and size up, and add offset of active area
var l0_location = new SizeL((long)(downsamples[os_level] * l_location.Width),
(long)(downsamples[os_level] * l_location.Height));
var l_size = new SizeL((long)Math.Min(Math.Ceiling(l_z_downsamples[level] * z_size.Width), dimensions[os_level].Width),
(long)Math.Min(Math.Ceiling(l_z_downsamples[level] * z_size.Height), dimensions[os_level].Height));
OpenSlide.TraceMsg("calcs done " + level + "/" + col + "_" + row);
var bmp = ReadRegion(l0_location, os_level, l_size);
if (l_size.Width != z_size.Width || l_size.Height != z_size.Height)
{ //only resize when necessary
OpenSlide.TraceMsg("resize " + level + "/" + col + "_" + row);
var oldbmp = bmp;
bmp = new SKBitmap((int)z_size.Width, (int)z_size.Height);
oldbmp.Resize(bmp, SKBitmapResizeMethod.Box);
}
OpenSlide.TraceMsg("new bmp " + level + "/" + col + "_" + row);
var stream = new MemoryStream();
//Prints tile coords for testing
//var g = Graphics.FromImage(resizedbmp);
//g.DrawString(level + "/" + col + "_" + row, new Font(FontFamily.GenericSansSerif, 18), new SolidBrush(Color.Black), resizedbmp.Width / 2, resizedbmp.Height / 2);
bmp.Encode(new SKManagedWStream(stream), SKEncodedImageFormat.Jpeg, 80);
OpenSlide.TraceMsg("end gettile " + level + "/" + col + "_" + row);
stream.Position = 0;
return(stream);
}
public MemoryStream GetJpg(string filename, string path)
{
//url = '/<ID>_files/<int:level>/<int:col>_<int:row>.<format>'
OpenSlide.TraceMsg("start getjpg " + path);
var m = rxDZ.Match(path);
if (m.Success)
{
var ost = GetOpenSlide(filename);
OpenSlide.TraceMsg("open os " + path);
var level = Int32.Parse(m.Groups[1].Value);
var col = Int64.Parse(m.Groups[2].Value);
var row = Int64.Parse(m.Groups[3].Value);
var ret = ost.GetTile(level, row, col);
OpenSlide.TraceMsg("end getjpg " + path);
return(ret);
}
return(null);
}
public Openslide(string filename)
{
OpenSlide.TraceMsg("start openslide " + filename);
origfile = filename;
if (!File.Exists(filename))
{
throw new ArgumentException($"File '{filename}' can't be opened");
}
handle = openslide_open(filename);
unsafe
{
if (handle == null || handle[0] == 0)
{
var vendor = openslide_detect_vendor(filename);
//GetLastError();
if (vendor.ToInt32() != 0)
{
throw new ArgumentException("Vendor " + Marshal.PtrToStringAnsi(vendor) + " unsupported?");
}
else
{
throw new ArgumentException("File unrecognized");
}
}
}
OpenSlide.TraceMsg("opened openslide " + filename);
max_os_level = openslide_get_level_count(handle);
if (max_os_level == -1)
{
GetLastError();
}
for (int level = 0; level < max_os_level; level++)
{
long w = 0, h = 0;
openslide_get_level_dimensions(handle, level, out w, out h);
if (w == -1 || h == -1)
{
GetLastError();
}
dimensions.Add(new SizeL(w, h));
var downsample = openslide_get_level_downsample(handle, level);
if (downsample == -1.0)
{
GetLastError();
}
downsamples.Add(downsample);
}
InitZDimensions();
t_dimensions = z_dimensions.Select(x => new SizeL((long)Math.Ceiling(x.Width / (double)TILE_DOWNSAMPLE),
(long)Math.Ceiling(x.Height / (double)TILE_DOWNSAMPLE))).ToArray();
max_dz_level = z_dimensions.Count;
l0_z_downsamples = Enumerable.Range(0, max_dz_level).Select(x => (int)Math.Pow(2, max_dz_level - x - 1)).ToArray();
os_level_for_dz_level = l0_z_downsamples.Select(x =>
{
var best_level = openslide_get_best_level_for_downsample(handle, x * 1.01);
if (best_level == -1)
{
GetLastError();
}
return(best_level);
}).ToArray();
l_z_downsamples = Enumerable.Range(0, max_dz_level).Select(l => l0_z_downsamples[l] / downsamples[os_level_for_dz_level[l]]).ToArray();
InitEasyLevels();
OpenSlide.TraceMsg("end openslide " + filename);
}
