private ILayerMasked merge(IBlendModeAlpha ablend, ILayerMasked baseLayer, IList <DescribedLayer> pars)
{
onMergeStarted();
if (pars == null || pars.Count == 0)
{
throw new ArgumentException();
}
var final = baseLayer;
foreach (var describ in pars)
{
var current = describ.Layer;
var blendMode = describ.GlobalParameters.BlendMode;
var offset = describ.GlobalParameters.Offset - .5f;
var minY = JryMath.Max(0, -current.Offset.Y);
var minX = JryMath.Max(0, -current.Offset.X);
var maxY = JryMath.Min(current.Resolution.Y, final.Resolution.Y - current.Offset.Y);
var maxX = JryMath.Min(current.Resolution.X, final.Resolution.X - current.Offset.X);
for (int y = minY; y < maxY; y++)
{
for (int x = minX; x < maxX; x++)
{
int ix = x + current.Offset.X;
int iy = y + current.Offset.Y;
var curVal = current[x, y];
if (!curVal.HasValue || !final[ix, iy].HasValue || !current.HasMask)
{
continue;
}
var maskValue = current.Mask[x, y];
if (!maskValue.HasValue)
{
continue;
}
var currentLayerValue = curVal.Value + offset;
var currentLayerMaskValue = maskValue.Value;
//currentLayerMaskValue = 1;
var upToThisPointGeneratedLayerValue = final[ix, iy].Value;
var blended = blendMode.Blend(upToThisPointGeneratedLayerValue, currentLayerValue * currentLayerMaskValue);
final[ix, iy] = ablend.Blend(upToThisPointGeneratedLayerValue, blended, currentLayerMaskValue);
if (final[ix, iy] > 0.05f)
{
}
}
}
}
return(baseLayer);
}
