private unsafe void DoCopyRaw(int sourceStride, int targetStride, byte *sourceOrigin, byte *targetOrigin)
{
// Sequential processing
if (SourceRectangle.Width < parallelThreshold)
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
byte *pSrc = sourceOrigin + SourceRectangle.Y * sourceStride + SourceRectangle.X;
byte *pDst = targetOrigin + TargetRectangle.Y * targetStride + TargetRectangle.X;
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
MemoryHelper.CopyMemory(pSrc, pDst, SourceRectangle.Width);
pSrc += sourceStride;
pDst += targetStride;
context.Progress?.Increment();
}
return;
}
// Parallel processing
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int width = SourceRectangle.Width;
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, y =>
{
byte *pSrc = sourceOrigin + (y + sourceLocation.Y) * sourceStride + sourceLocation.X;
byte *pDst = targetOrigin + (y + targetLocation.Y) * targetStride + targetLocation.X;
MemoryHelper.CopyMemory(pSrc, pDst, width);
});
}
public void Test_ParallelHelper_ParameterName_ThrowArgumentOutOfRangeExceptionForStartGreaterThanEnd()
{
try
{
ParallelHelper.For <DummyAction>(1, 0);
}
catch (ArgumentOutOfRangeException e) when(e.GetType() == typeof(ArgumentOutOfRangeException))
{
var name = (
from method in typeof(ParallelHelper).GetMethods()
where
method.Name == nameof(ParallelHelper.For) &&
method.IsGenericMethodDefinition
let typeParams = method.GetGenericArguments()
let normalParams = method.GetParameters()
where
typeParams.Length == 1 &&
normalParams.Length == 2 &&
normalParams.All(p => p.ParameterType == typeof(int))
select normalParams[0].Name).Single();
Assert.AreEqual(e.ParamName, name);
return;
}
Assert.Fail("Failed to raise correct exception");
}
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));
}
});
}
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));
}
});
}
private void PerformDrawWithDithering(IQuantizingSession quantizingSession, IDitheringSession ditheringSession)
{
IBitmapDataInternal source = Source;
IBitmapDataInternal target = Target;
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int sourceWidth = SourceRectangle.Width;
// Sequential processing
if (ditheringSession.IsSequential || SourceRectangle.Width < parallelThreshold >> ditheringScale)
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
ProcessRow(y);
context.Progress?.Increment();
}
return;
}
// Parallel processing
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, ProcessRow);
#region Local Methods
void ProcessRow(int 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;
byte alphaThreshold = quantizingSession.AlphaThreshold;
int width = sourceWidth;
for (int x = 0; x < width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + offsetSrc);
// fully solid source: overwrite
if (colorSrc.A == Byte.MaxValue)
{
rowDst.DoSetColor32(x + offsetDst, session.GetDitheredColor(colorSrc, x, y));
continue;
}
// fully transparent source: skip
if (colorSrc.A == 0)
{
continue;
}
// source here has a partial transparency: we need to read the target color
int pos = x + offsetDst;
Color32 colorDst = rowDst.DoGetColor32(pos);
// non-transparent target: blending
if (colorDst.A != 0)
{
colorSrc = colorDst.A == Byte.MaxValue
// target pixel is fully solid: simple blending
? colorSrc.BlendWithBackground(colorDst)
// both source and target pixels are partially transparent: complex blending
: colorSrc.BlendWith(colorDst);
}
// overwriting target color only if blended color has high enough alpha
if (colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(pos, session.GetDitheredColor(colorSrc, x, y));
}
}
#endregion
}
internal void PerformDrawDirect()
{
IBitmapDataInternal source = Source;
IBitmapDataInternal target = Target;
Point sourceLocation = SourceRectangle.Location;
Point targetLocation = TargetRectangle.Location;
int sourceWidth = SourceRectangle.Width;
// Sequential processing
if (SourceRectangle.Width < parallelThreshold)
{
if (Target.IsFastPremultiplied())
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
ProcessRowPremultiplied(y);
context.Progress?.Increment();
}
}
else
{
context.Progress?.New(DrawingOperation.ProcessingPixels, SourceRectangle.Height);
for (int y = 0; y < SourceRectangle.Height; y++)
{
if (context.IsCancellationRequested)
{
return;
}
ProcessRowStraight(y);
context.Progress?.Increment();
}
}
return;
}
// Parallel processing
Action <int> processRow = Target.IsFastPremultiplied()
? ProcessRowPremultiplied
: (Action <int>)ProcessRowStraight;
ParallelHelper.For(context, DrawingOperation.ProcessingPixels, 0, SourceRectangle.Height, processRow);
#region Local Methods
void ProcessRowStraight(int y)
{
IBitmapDataRowInternal rowSrc = source.DoGetRow(sourceLocation.Y + y);
IBitmapDataRowInternal rowDst = target.DoGetRow(targetLocation.Y + y);
int offsetSrc = sourceLocation.X;
int offsetDst = targetLocation.X;
byte alphaThreshold = target.AlphaThreshold;
int width = sourceWidth;
for (int x = 0; x < width; x++)
{
Color32 colorSrc = rowSrc.DoGetColor32(x + offsetSrc);
// fully solid source: overwrite
if (colorSrc.A == Byte.MaxValue)
{
rowDst.DoSetColor32(x + offsetDst, colorSrc);
continue;
}
// fully transparent source: skip
if (colorSrc.A == 0)
{
continue;
}
// source here has a partial transparency: we need to read the target color
int pos = x + offsetDst;
Color32 colorDst = rowDst.DoGetColor32(pos);
// non-transparent target: blending
if (colorDst.A != 0)
{
colorSrc = colorDst.A == Byte.MaxValue
// target pixel is fully solid: simple blending
? colorSrc.BlendWithBackground(colorDst)
// both source and target pixels are partially transparent: complex blending
: colorSrc.BlendWith(colorDst);
}
// overwriting target color only if blended color has high enough alpha
if (colorSrc.A < alphaThreshold)
{
continue;
}
rowDst.DoSetColor32(pos, colorSrc);
}
}
void ProcessRowPremultiplied(int 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++)
{
Color32 colorSrc = rowSrc.DoGetColor32Premultiplied(x + offsetSrc);
// fully solid source: overwrite
if (colorSrc.A == Byte.MaxValue)
{
rowDst.DoSetColor32Premultiplied(x + offsetDst, colorSrc);
continue;
}
// fully transparent source: skip
if (colorSrc.A == 0)
{
continue;
}
// source here has a partial transparency: we need to read the target color
int pos = x + offsetDst;
Color32 colorDst = rowDst.DoGetColor32Premultiplied(pos);
// non-transparent target: blending
if (colorDst.A != 0)
{
colorSrc = colorSrc.BlendWithPremultiplied(colorDst);
}
rowDst.DoSetColor32Premultiplied(pos, colorSrc);
}
}
#endregion
}
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));
}
});
}
