protected override ITextureFilter CreateFilter(ITextureFilter input)
{
var sourceSize = input.Output.Size;
if (!IsUpscalingFrom(sourceSize))
{
return(input);
}
var targetSize = Renderer.TargetSize;
CreateWeights((Size)sourceSize, targetSize);
int lobes = TapCount.ToInt() / 2;
var shader = CompileShader("EwaScaler.hlsl",
macroDefinitions:
string.Format("LOBES = {0}; AR = {1}",
lobes, AntiRingingEnabled ? 1 : 0))
.Configure(
transform: size => targetSize,
arguments: new[] { AntiRingingStrength },
linearSampling: true
);
return(GetEwaFilter(shader, new[] { input }));
}
public ITextureFilter ScaleChroma(ICompositionFilter composition)
{
var chromaSize = composition.Chroma.Size();
var targetSize = composition.TargetSize;
// Fall back to default when downscaling is needed
if (targetSize.Width < chromaSize.Width || targetSize.Height < chromaSize.Height)
{
return(composition);
}
CreateWeights(chromaSize, targetSize);
var offset = composition.ChromaOffset + new Vector2(0.5f, 0.5f);
int lobes = TapCount.ToInt() / 2;
var shader = new Shader(FromFile("EwaScaler.hlsl",
compilerOptions:
string.Format("LOBES = {0}; AR = {1}; CHROMA = 1;", lobes, AntiRingingEnabled ? 1 : 0)))
{
Transform = size => targetSize,
Arguments = new[] { AntiRingingStrength, offset.X, offset.Y },
LinearSampling = true
};
var resizedLuma = composition.Luma.SetSize(targetSize, tagged: true);
return(GetEwaFilter(shader, new[] { resizedLuma, composition.Chroma }).ConvertToRgb());
}
public ITextureFilter CreateChromaFilter(ITextureFilter lumaInput, ITextureFilter chromaInput, TextureSize targetSize, Vector2 chromaOffset)
{
var chromaSize = chromaInput.Output.Size;
CreateWeights(chromaSize, targetSize);
var offset = chromaOffset + new Vector2(0.5f, 0.5f);
int lobes = TapCount.ToInt() / 2;
var shader = CompileShader("EwaScaler.hlsl",
macroDefinitions:
string.Format("LOBES = {0}; AR = {1}; CHROMA = 1;",
lobes, AntiRingingEnabled ? 1 : 0))
.Configure(
transform: size => targetSize,
arguments: new[] { AntiRingingStrength, offset.X, offset.Y },
linearSampling: true
);
// Fall back to default when downscaling is needed
if (targetSize.Width < chromaSize.Width || targetSize.Height < chromaSize.Height)
{
return(null);
}
var resizedLuma = lumaInput.SetSize(targetSize, tagged: true);
return(GetEwaFilter(shader, new[] { resizedLuma, chromaInput }).ConvertToRgb());
}
protected override ITextureFilter CreateFilter(ITextureFilter input)
{
var sourceSize = input.Size();
if ((Renderer.TargetSize <= sourceSize).Any)
{
return(input);
}
var targetSize = Renderer.TargetSize;
CreateWeights((Size)sourceSize, targetSize);
int lobes = TapCount.ToInt() / 2;
var shader = new Shader(FromFile("EwaScaler.hlsl",
compilerOptions:
string.Format("LOBES = {0}; AR = {1}",
lobes, AntiRingingEnabled ? 1 : 0)))
{
Transform = size => targetSize,
Arguments = new[] { AntiRingingStrength },
LinearSampling = true
};
return(GetEwaFilter(shader, new[] { input }));
}
protected void CreateWeights(TextureSize sourceSize, TextureSize targetSize)
{
DisposeHelper.DisposeElements(ref m_Weights);
double scaleFactorX = GetScaleFactor(targetSize.Width, sourceSize.Width);
double scaleFactorY = GetScaleFactor(targetSize.Height, sourceSize.Height);
var tapCount = TapCount.ToInt();
int lobes = tapCount / 2;
m_Weights = new IManagedTexture <ISourceTexture> [lobes];
var dataPointsX = GetDataPointCount(scaleFactorX);
var dataPointsY = GetDataPointCount(scaleFactorY);
var channels = lobes == 2 ? 2 : 4;
var data = new Half[dataPointsY, dataPointsX *channels];
for (int z = 0; z < lobes; z++)
{
for (int y = 0; y < dataPointsY; y++)
{
for (int x = 0; x < dataPointsX; x++)
{
var offsetX = x / (double)dataPointsX;
var offsetY = y / (double)dataPointsX;
for (int i = 0; i < lobes; i++)
{
var distance = GetDistance(i + offsetX, z + offsetY);
data[y, x *channels + i] = GetWeight(distance, tapCount);
}
}
}
var weight = Renderer.CreateTexture(dataPointsX, dataPointsY,
channels == 2 ? TextureFormat.Float16_RG : TextureFormat.Float16);
Renderer.UpdateTexture(weight, data);
m_Weights[z] = weight.GetManaged();
}
}
protected void CreateWeights(Size sourceSize, Size targetSize)
{
if (m_Weights != null)
{
return;
}
double scaleFactorX = GetScaleFactor(targetSize.Width, sourceSize.Width);
double scaleFactorY = GetScaleFactor(targetSize.Height, sourceSize.Height);
var tapCount = TapCount.ToInt();
int lobes = tapCount / 2;
m_Weights = new ISourceTexture[lobes];
var dataPointsX = GetDataPointCount(scaleFactorX);
var dataPointsY = GetDataPointCount(scaleFactorY);
var data = new Half[dataPointsY, dataPointsX * 4];
for (int z = 0; z < lobes; z++)
{
for (int y = 0; y < dataPointsY; y++)
{
for (int x = 0; x < dataPointsX; x++)
{
var offsetX = x / (double)dataPointsX;
var offsetY = y / (double)dataPointsX;
for (int i = 0; i < 4; i++)
{
var distance = GetDistance(i + offsetX, z + offsetY);
data[y, x *4 + i] = GetWeight(distance, tapCount);
}
}
}
m_Weights[z] = Renderer.CreateTexture(dataPointsX, dataPointsY);
Renderer.UpdateTexture(m_Weights[z], data);
}
}
public override IFilter CreateFilter(IFilter input)
{
DiscardTextures();
if (Renderer.InputFormat.IsRgb())
{
return(input);
}
var sourceSize = input.OutputSize;
if (!IsUpscalingFrom(sourceSize))
{
return(input);
}
var targetSize = Renderer.LumaSize;
CreateWeights((Size)sourceSize, targetSize);
var offset = Renderer.ChromaOffset + new Vector2(0.5f, 0.5f);
int lobes = TapCount.ToInt() / 2;
var shader = CompileShader("EwaScaler.hlsl",
macroDefinitions:
string.Format("LOBES = {0}; AR = {1}; CHROMA = 1;",
lobes, AntiRingingEnabled ? 1 : 0))
.Configure(
transform: size => targetSize,
arguments: new[] { AntiRingingStrength, offset.X, offset.Y },
linearSampling: true
);
var yuvFilters = new IFilter[] { new YSourceFilter(), new USourceFilter(), new VSourceFilter() };
return(GetEwaFilter(shader, yuvFilters).ConvertToRgb());
}