public override ApplyState Apply(ComputedStyle style, Value value)
{
RenderableData rd = style.RenderData;
RasterDisplayableProperty rdp = rd.RasterProperty;
if (value == null || value.IsType(typeof(Css.Keywords.None)))
{
// Remove RDP
if (rdp != null)
{
// Destroy it:
rdp.Destroy();
// Request a layout:
rdp.RequestLayout();
// Clear:
rd.RasterProperty = null;
rdp = null;
}
}
else if (rdp == null)
{
// RDP required:
rd.RasterProperty = rdp = new RasterDisplayableProperty(rd);
// Update the filter now!
BuildFilter(value, rd, delegate(RenderableData ctx, SurfaceTexture tex){
// Hopefully tex is not null!
// If so, we can write it into ctx.RasterProperty, which is hopefully
// still available:
RasterDisplayableProperty filterRdp = ctx.RasterProperty;
if (filterRdp != null)
{
// Alright - update it with the filter (which might be null).
// The filter goes between the FlatWorldUI and the Output.
filterRdp.SetFilter(tex);
// Request a layout:
filterRdp.RequestLayout();
}
});
}
// Ok!
return(ApplyState.Ok);
}