/// <summary>Builds a Loonim filter from the given set of one or more CSS functions.</summary>
public static void BuildFilter(Css.Value value, RenderableData context, FilterEventDelegate fe)
{
if (value is Css.Functions.UrlFunction)
{
// - (A URL to an SVG filter) (not supported yet here)
// - A URL to a Loonim filter (with a property called source0)
// Load it now!
DataPackage dp = new DataPackage(value.Text, context.Document.basepath);
dp.onload = delegate(UIEvent e){
// Got the data! Load a filter now:
SurfaceTexture st = null;
// Create:
st = new SurfaceTexture();
// Load it:
st.Load(dp.responseBytes);
// Run the callback:
fe(context, st);
};
// Send:
dp.send();
}
else
{
Loonim.TextureNode first = null;
Loonim.TextureNode last = null;
// - One or more filter functions
if (value is Css.CssFunction)
{
// Just one:
first = last = value.ToLoonimNode(context);
}
else if (value is Css.ValueSet)
{
// Many
for (int i = 0; i < value.Count; i++)
{
// Convert to a Loonim node:
Loonim.TextureNode next = value[i].ToLoonimNode(context);
if (next == null)
{
// Quit!
first = null;
last = null;
break;
}
// Hook it on:
if (first == null)
{
first = last = next;
}
else
{
// Add it to the chain:
next.Sources[0] = last;
last = next;
}
}
}
SurfaceTexture st = null;
if (last != null)
{
// Create the texture:
st = new SurfaceTexture();
st.Set("source0", (UnityEngine.Texture)null);
st.Root = last;
first.Sources[0] = new Loonim.Property(st, "source0");
}
// Run the callback now!
fe(context, st);
}
}