//public bool HasAlpha => !(Min.Alpha == 1.0f && Max.Alpha == 1.0f);
internal float GetStats(ITexture texture, LayerMipmapRange lm, StatisticsShader statShader, ReduceShader redShader, bool normalize)
{
Debug.Assert(lm.IsSingleMipmap);
// obtain a buffer that is big enough
int numElements = texture.Size.GetMip(lm.FirstMipmap).Product;
if (lm.AllLayer)
{
numElements *= texture.LayerMipmap.Layers;
}
// allocate buffer that is big enough
GetBuffer(numElements);
// copy all values into buffer
statShader.CopyToBuffer(texture, buffer, lm);
// execute reduce
redShader.Run(buffer, numElements);
shared.Download.CopyFrom(buffer, sizeof(float));
var res = shared.Download.GetData <float>();
if (normalize)
{
res /= numElements;
}
return(res);
}
//public bool HasAlpha => !(Min.Alpha == 1.0f && Max.Alpha == 1.0f);
internal float GetStats(ITexture texture, int layer, int mipmap, StatisticsShader statShader, ReduceShader redShader, bool normalize)
{
// obtain a buffer that is big enough
int numElements = texture.Size.GetMip(mipmap).Product;
if (layer == -1)
{
numElements *= texture.NumLayers;
}
if (buffer == null || buffer.ElementCount < numElements)
{
buffer?.Dispose();
buffer = new GpuBuffer(4, numElements);
}
// copy all values into buffer
statShader.CopyToBuffer(texture, buffer, layer, mipmap);
// execute reduce
redShader.Run(buffer, numElements);
shared.Download.CopyFrom(buffer);
var res = shared.Download.GetData <float>();
if (normalize)
{
res /= numElements;
}
return(res);
}
internal DefaultStatisticsType(StatisticsShader shader, ITexture texture, StatisticsModel parent, LayerMipmapRange lm)
{
this.shader = shader;
this.texture = texture;
this.parent = parent;
this.lm = lm;
minValue = null;
maxValue = null;
avgValue = null;
}
internal DefaultStatisticsType(StatisticsShader shader, ITexture texture, StatisticsModel parent, int layer, int mipmap)
{
this.shader = shader;
this.texture = texture;
this.parent = parent;
this.layer = layer;
this.mipmap = mipmap;
minValue = null;
maxValue = null;
avgValue = null;
}
public SSIMModel(Models models)
{
this.models = models;
this.copyToBufferShader = new StatisticsShader(models.SharedModel.Upload, StatisticsShader.RedValue);
}