private static void DoSaveWidePlatformDependent(IAsyncContext context, IBitmapDataInternal bitmapData, Rectangle rect, BinaryWriter writer)
{
PixelFormat pixelFormat = bitmapData.PixelFormat;
int byteLength = pixelFormat.ToBitsPerPixel() >> 3;
// using a temp 1x1 managed bitmap data for the conversion
using IBitmapDataInternal tempData = CreateManagedBitmapData(new Size(1, 1), pixelFormat, bitmapData.BackColor, bitmapData.AlphaThreshold);
IBitmapDataRowInternal tempRow = tempData.DoGetRow(0);
IBitmapDataRowInternal row = bitmapData.DoGetRow(rect.Top);
for (int y = 0; y < rect.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
for (int x = rect.Left; x < rect.Right; x++)
{
tempRow.DoSetColor32(0, row.DoGetColor32(x));
for (int i = 0; i < byteLength; i++)
{
writer.Write(tempRow.DoReadRaw <byte>(i));
}
}
row.MoveNextRow();
context.Progress?.Increment();
}
}
private void PerformCopyDirectPremultiplied()
{
// Sequential processing
if (SourceRectangle.Width < parallelThreshold)
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
IBitmapDataRowInternal rowSrc = Source.DoGetRow(SourceRectangle.Y);
IBitmapDataRowInternal rowDst = Target.DoGetRow(TargetRectangle.Y);
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
for (int x = 0; x < SourceRectangle.Width; x++)
{
rowDst.DoSetColor32Premultiplied(x + TargetRectangle.X, rowSrc.DoGetColor32Premultiplied(x + SourceRectangle.X));
}
rowSrc.MoveNextRow();
rowDst.MoveNextRow();
context.Progress?.Increment();
}
return;
}
// Parallel processing
IBitmapDataInternal source = Source;
IBitmapDataInternal target = Target;
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int sourceWidth = SourceRectangle.Width;
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, y =>
{
IBitmapDataRowInternal rowSrc = source.DoGetRow(sourceLocation.Y + y);
IBitmapDataRowInternal rowDst = target.DoGetRow(targetLocation.Y + y);
int offsetSrc = sourceLocation.X;
int offsetDst = targetLocation.X;
int width = sourceWidth;
for (int x = 0; x < width; x++)
{
rowDst.DoSetColor32Premultiplied(x + offsetDst, rowSrc.DoGetColor32Premultiplied(x + offsetSrc));
}
});
}
private static void DoSaveRawLongs(IAsyncContext context, IBitmapDataInternal bitmapData, Rectangle rect, BinaryWriter writer)
{
IBitmapDataRowInternal row = bitmapData.DoGetRow(rect.Top);
for (int y = 0; y < rect.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
for (int x = rect.Left; x < rect.Right; x++)
{
writer.Write(row.DoReadRaw <long>(x));
}
row.MoveNextRow();
context.Progress?.Increment();
}
}
public void ReplaceColorTest()
{
using var bmp = Icons.Shield.ExtractBitmap(new Size(128, 128), true).Resize(new Size(256, 256));
new PerformanceTest {
Iterations = 100, CpuAffinity = null
}
.AddCase(() =>
{
using var result = bmp.CloneBitmap();
result.MakeTransparent(Color.Black);
}, "Bitmap.MakeTransparent")
.AddCase(() =>
{
using var result = bmp.CloneBitmap();
result.ReplaceColor(Color.Black, Color.Transparent);
}, "BitmapExtensions.ReplaceColor")
.AddCase(() =>
{
using var result = bmp.CloneBitmap();
using (IBitmapDataInternal bitmapData = BitmapDataFactory.CreateBitmapData(result, ImageLockMode.ReadWrite))
{
Color32 from = new Color32(Color.Black);
Color32 to = new Color32(Color.Transparent);
IBitmapDataRowInternal row = bitmapData.DoGetRow(0);
do
{
for (int x = 0; x < bitmapData.Width; x++)
{
if (row[x] != from)
{
continue;
}
row[x] = to;
}
} while (row.MoveNextRow());
}
}, "Sequential processing")
.DoTest()
.DumpResults(Console.Out);
}
internal void PerformCopyWithQuantizer(IQuantizingSession quantizingSession, bool skipTransparent)
{
// Sequential processing
if (SourceRectangle.Width < parallelThreshold >> quantizingScale)
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
IBitmapDataRowInternal rowSrc = Source.DoGetRow(SourceRectangle.Y);
IBitmapDataRowInternal rowDst = Target.DoGetRow(TargetRectangle.Y);
byte alphaThreshold = quantizingSession.AlphaThreshold;
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
for (int x = 0; x < SourceRectangle.Width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + SourceRectangle.X);
if (skipTransparent && colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(x + TargetRectangle.X, quantizingSession.GetQuantizedColor(colorSrc));
}
rowSrc.MoveNextRow();
rowDst.MoveNextRow();
context.Progress?.Increment();
}
return;
}
IBitmapDataInternal source = Source;
IBitmapDataInternal target = Target;
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int sourceWidth = SourceRectangle.Width;
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, y =>
{
IQuantizingSession session = quantizingSession;
IBitmapDataRowInternal rowSrc = source.DoGetRow(sourceLocation.Y + y);
IBitmapDataRowInternal rowDst = target.DoGetRow(targetLocation.Y + y);
int offsetSrc = sourceLocation.X;
int offsetDst = targetLocation.X;
int width = sourceWidth;
byte alphaThreshold = session.AlphaThreshold;
bool skip = skipTransparent;
for (int x = 0; x < width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + offsetSrc);
if (skip && colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(x + offsetDst, session.GetQuantizedColor(colorSrc));
}
});
}
internal void PerformCopyWithDithering(IQuantizingSession quantizingSession, IDitheringSession ditheringSession, bool skipTransparent)
{
// Sequential processing
if (ditheringSession.IsSequential || SourceRectangle.Width < parallelThreshold >> ditheringScale)
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
IBitmapDataRowInternal rowSrc = Source.DoGetRow(SourceRectangle.Y);
IBitmapDataRowInternal rowDst = Target.DoGetRow(TargetRectangle.Y);
byte alphaThreshold = quantizingSession.AlphaThreshold;
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
// we can pass x, y to the dithering session because if there is an offset it was initialized by a properly clipped rectangle
for (int x = 0; x < SourceRectangle.Width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + SourceRectangle.X);
if (skipTransparent && colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(x + TargetRectangle.X, ditheringSession.GetDitheredColor(colorSrc, x, y));
}
rowSrc.MoveNextRow();
rowDst.MoveNextRow();
context.Progress?.Increment();
}
return;
}
// Parallel processing
IBitmapDataInternal source = Source;
IBitmapDataInternal target = Target;
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int sourceWidth = SourceRectangle.Width;
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, y =>
{
IDitheringSession session = ditheringSession;
IBitmapDataRowInternal rowSrc = source.DoGetRow(sourceLocation.Y + y);
IBitmapDataRowInternal rowDst = target.DoGetRow(targetLocation.Y + y);
int offsetSrc = sourceLocation.X;
int offsetDst = targetLocation.X;
int width = sourceWidth;
byte alphaThreshold = quantizingSession.AlphaThreshold;
bool skip = skipTransparent;
// we can pass x, y to the dithering session because if there is an offset it was initialized by a properly clipped rectangle
for (int x = 0; x < width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + offsetSrc);
if (skip && colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(x + offsetDst, session.GetDitheredColor(colorSrc, x, y));
}
});
}
private static IReadWriteBitmapData?DoLoadBitmapData(IAsyncContext context, Stream stream)
{
context.Progress?.New(DrawingOperation.Loading, 1000);
var reader = new BinaryReader(stream);
if (reader.ReadInt32() != magicNumber)
{
throw new ArgumentException(Res.ImagingNotBitmapDataStream, nameof(stream));
}
var size = new Size(reader.ReadInt32(), reader.ReadInt32());
var pixelFormat = (PixelFormat)reader.ReadInt32();
Color32 backColor = Color32.FromArgb(reader.ReadInt32());
byte alphaThreshold = reader.ReadByte();
Palette?palette = null;
int paletteLength = reader.ReadInt32();
if (paletteLength > 0)
{
var entries = new Color32[paletteLength];
for (int i = 0; i < paletteLength; i++)
{
entries[i] = Color32.FromArgb(reader.ReadInt32());
}
palette = new Palette(entries, backColor, alphaThreshold);
}
context.Progress?.SetProgressValue((int)(stream.Position * 1000 / stream.Length));
if (context.IsCancellationRequested)
{
return(null);
}
IBitmapDataInternal result = CreateManagedBitmapData(size, pixelFormat, backColor, alphaThreshold, palette);
int bpp = pixelFormat.ToBitsPerPixel();
bool canceled = false;
try
{
IBitmapDataRowInternal row = result.DoGetRow(0);
for (int y = 0; y < result.Height; y++)
{
if (canceled = context.IsCancellationRequested)
{
return(null);
}
switch (bpp)
{
case 32:
for (int x = 0; x < result.Width; x++)
{
row.DoWriteRaw(x, reader.ReadInt32());
}
break;
case 16:
for (int x = 0; x < result.Width; x++)
{
row.DoWriteRaw(x, reader.ReadInt16());
}
break;
case 64:
for (int x = 0; x < result.Width; x++)
{
row.DoWriteRaw(x, reader.ReadInt64());
}
break;
default:
for (int x = 0; x < result.RowSize; x++)
{
row.DoWriteRaw(x, reader.ReadByte());
}
break;
}
row.MoveNextRow();
context.Progress?.SetProgressValue((int)(stream.Position * 1000 / stream.Length));
}
return((canceled = context.IsCancellationRequested) ? null : result);
}
finally
{
if (canceled)
{
result.Dispose();
}
}
}