public void QuantizePerformanceTest()
{
//using var bmpRef = new Bitmap(@"D:\Letolt\MYSTY8RQER62.jpg");
using var bmpRef = Icons.Information.ExtractBitmap(new Size(256, 256));
IQuantizer quantizer = PredefinedColorsQuantizer.SystemDefault8BppPalette();
new PerformanceTest {
TestName = $"{bmpRef.Width}x{bmpRef.Height}@{bmpRef.GetColorCount()}", Iterations = 100, CpuAffinity = null
}
.AddCase(() =>
{
using var result = bmpRef.CloneBitmap();
result.Quantize(quantizer);
}, "BitmapExtensions.Quantize")
.AddCase(() =>
{
using var result = bmpRef.CloneBitmap();
using (IBitmapDataInternal bitmapData = BitmapDataFactory.CreateBitmapData(result, ImageLockMode.ReadWrite))
using (IQuantizingSession session = quantizer.Initialize(bitmapData))
{
var row = bitmapData.DoGetRow(0);
int width = bitmapData.Width;
do
{
for (int x = 0; x < width; x++)
{
row.DoSetColor32(x, session.GetQuantizedColor(row.DoGetColor32(x)));
}
} while (row.MoveNextRow());
}
}, "Sequential quantization")
.DoTest()
.DumpResults(Console.Out);
}
public void DitherPerformanceTest(bool errorDiffusion)
{
using var bmpRef = Icons.Information.ExtractBitmap(new Size(256, 256));
IQuantizer quantizer = PredefinedColorsQuantizer.SystemDefault8BppPalette();
IDitherer ditherer = errorDiffusion ? (IDitherer)ErrorDiffusionDitherer.FloydSteinberg : OrderedDitherer.Bayer8x8;
new PerformanceTest {
TestName = $"{bmpRef.Width}x{bmpRef.Height}@{bmpRef.GetColorCount()} {(errorDiffusion ? "Error Diffusion" : "Ordered")}", Iterations = 100, CpuAffinity = null
}
.AddCase(() =>
{
using var result = bmpRef.CloneBitmap();
result.Dither(quantizer, ditherer);
}, "BitmapExtensions.Dither")
.AddCase(() =>
{
using var result = bmpRef.CloneBitmap();
using (IBitmapDataInternal bitmapData = BitmapDataFactory.CreateBitmapData(result, ImageLockMode.ReadWrite))
using (IQuantizingSession quantizingSession = quantizer.Initialize(bitmapData))
using (IDitheringSession ditheringSession = ditherer.Initialize(bitmapData, quantizingSession))
{
var row = bitmapData.DoGetRow(0);
int width = bitmapData.Width;
do
{
for (int x = 0; x < width; x++)
{
row.DoSetColor32(x, ditheringSession.GetDitheredColor(row.DoGetColor32(x), x, row.Index));
}
} while (row.MoveNextRow());
}
}, "Sequential dithering")
.DoTest()
.DumpResults(Console.Out);
}
internal void PerformDraw(IQuantizer quantizer, IDitherer ditherer)
{
if (quantizer == null)
{
PerformDrawDirect();
return;
}
IReadableBitmapData initSource = SourceRectangle.Size == Source.GetSize()
? Source
: Source.Clip(SourceRectangle);
try
{
Debug.Assert(!quantizer.InitializeReliesOnContent || !Source.HasMultiLevelAlpha(), "This draw performs blending on-the-fly but the used quantizer would require two-pass processing");
context.Progress?.New(DrawingOperation.InitializingQuantizer);
using (IQuantizingSession quantizingSession = quantizer.Initialize(initSource, context))
{
if (context.IsCancellationRequested)
{
return;
}
if (quantizingSession == null)
{
throw new InvalidOperationException(Res.ImagingQuantizerInitializeNull);
}
// quantizing without dithering
if (ditherer == null)
{
PerformDrawWithQuantizer(quantizingSession);
return;
}
// quantizing with dithering
Debug.Assert(!ditherer.InitializeReliesOnContent || !Source.HasMultiLevelAlpha(), "This draw performs blending on-the-fly but the used ditherer would require two-pass processing");
context.Progress?.New(DrawingOperation.InitializingDitherer);
using IDitheringSession ditheringSession = ditherer.Initialize(initSource, quantizingSession, context);
if (context.IsCancellationRequested)
{
return;
}
if (ditheringSession == null)
{
throw new InvalidOperationException(Res.ImagingDithererInitializeNull);
}
PerformDrawWithDithering(quantizingSession, ditheringSession);
}
}
finally
{
if (!ReferenceEquals(initSource, Source))
{
initSource.Dispose();
}
}
}
public void ClearWithDitheringTest(PixelFormat pixelFormat, uint argb, bool errorDiffusion)
{
const int size = 512;
Color color = Color.FromArgb((int)argb);
var ditherer = errorDiffusion ? (IDitherer)ErrorDiffusionDitherer.FloydSteinberg : OrderedDitherer.Bayer8x8;
new PerformanceTest {
TestName = $"{pixelFormat} {size}x{size} {(errorDiffusion ? "Error Diffusion" : "Ordered Dithering")}", Iterations = 10, CpuAffinity = null
}
.AddCase(() =>
{
using var bmp = new Bitmap(size, size, pixelFormat);
using IBitmapDataInternal acc = BitmapDataFactory.CreateBitmapData(bmp, ImageLockMode.ReadWrite);
IQuantizer quantizer = PredefinedColorsQuantizer.FromBitmapData(acc);
var c = new Color32(color);
using (IQuantizingSession quantizingSession = quantizer.Initialize(acc))
using (IDitheringSession ditheringSession = ditherer.Initialize(acc, quantizingSession))
{
IReadWriteBitmapDataRow row = acc.DoGetRow(0);
do
{
for (int x = 0; x < acc.Width; x++)
{
row[x] = ditheringSession.GetDitheredColor(c, x, row.Index);
}
} while (row.MoveNextRow());
}
}, "Sequential clear")
.AddCase(() =>
{
using var bmp = new Bitmap(size, size, pixelFormat);
bmp.Clear(color, ditherer);
}, "BitmapDataAccessor.Clear")
.DoTest()
.DumpResults(Console.Out);
}