protected override double EvalVariable(string variable)
{
var m = Regex.Match(variable, @"^([A-Za-z0-9_\-]+)\.(\w+)$");
if (!m.Success)
{
return(base.EvalVariable(variable));
}
var layerId = m.Groups[1].Value;
var layerProperty = m.Groups[2].Value;
BitmapBase varImg;
if (layerId == "this")
{
varImg = _layer;
}
else
{
var varLayer = _renderTask.Style.Layers.FirstOrDefault(x => x.Id == layerId);
if (varLayer == null)
{
throw NewParseException(App.Translation.Calculator.Err_NoLayerWithId.Fmt(layerId));
}
if (_renderTask.IsLayerAlreadyReferenced(varLayer))
{
throw NewParseException(App.Translation.Calculator.Err_RecursiveLayerReference.Fmt(layerId));
}
varImg = _renderTask.RenderLayer(varLayer);
}
var pixels = varImg.PreciseSize();
switch (layerProperty.ToLower())
{
case "width": return(pixels.Width);
case "height": return(pixels.Height);
case "top": return(pixels.Top);
case "left": return(pixels.Left);
case "right": return(pixels.Right);
case "bottom": return(pixels.Bottom);
case "centerhorz": return(pixels.CenterHorzD);
case "centervert": return(pixels.CenterVertD);
default:
throw NewParseException(App.Translation.Calculator.Err_UnknownLayerProperty.Fmt(layerProperty));
}
}
public unsafe override BitmapBase Apply(RenderTask renderTask, BitmapBase layer)
{
Tank tank = renderTask.Tank;
LayerBase maskLayer;
if (string.IsNullOrEmpty(MaskLayerId))
{
return(layer);
}
maskLayer = renderTask.Style.Layers.FirstOrDefault(x => x.Id == MaskLayerId);
if (maskLayer == null)
{
throw new StyleUserError(App.Translation.EffectMaskLayer.ErrorInvalidId.Fmt(MaskLayerId));
}
if (renderTask.IsLayerAlreadyReferenced(maskLayer))
{
throw new StyleUserError(App.Translation.EffectMaskLayer.ErrorRecursiveLayerReference.Fmt(MaskLayerId));
}
var maskImg = renderTask.RenderLayer(maskLayer);
using (layer.UseWrite())
{
using (maskImg.UseRead())
{
for (int i = 0; i < layer.Width; ++i)
{
for (int j = 0; j < layer.Height; ++j)
{
decimal alpha = 0;
if (i < maskImg.Width && j < maskImg.Height)
{
switch (MaskMode)
{
case Effects.MaskMode.Opacity:
alpha = maskImg.Data[i * 4 + maskImg.Stride * j + 3];
break;
case Effects.MaskMode.Grayscale:
alpha = (maskImg.Data[i * 4 + maskImg.Stride * j]
+ maskImg.Data[i * 4 + maskImg.Stride * j + 1]
+ maskImg.Data[i * 4 + maskImg.Stride * j + 2]
) / 3;
break;
case Effects.MaskMode.Combined:
alpha = (maskImg.Data[i * 4 + maskImg.Stride * j]
+ maskImg.Data[i * 4 + maskImg.Stride * j + 1]
+ maskImg.Data[i * 4 + maskImg.Stride * j + 2]
) / 3 * maskImg.Data[i * 4 + maskImg.Stride * j + 3] / 255m;
break;
}
}
if (Invert)
{
alpha = 255m - alpha;
}
var opacity = layer.Data[i * 4 + layer.Stride * j + 3] * (alpha / 255m);
layer.Data[i * 4 + layer.Stride * j + 3] = (byte)opacity;
}
}
}
}
return(layer);
}
