protected override void Render (ImageSurface src, ImageSurface dst, Gdk.Rectangle roi)
{
var r = roi.ToCairoRectangle ();
using (var temp = new ImageSurface (Format.Argb32, roi.Width, roi.Height)) {
RenderClouds (temp, roi, Data.Scale, (byte)(Data.Seed ^ instanceSeed), Data.Power / 100.0,
PintaCore.Palette.PrimaryColor.ToColorBgra (), PintaCore.Palette.SecondaryColor.ToColorBgra ());
temp.MarkDirty ();
// Have to lock because effect renderer is multithreaded
lock (render_lock) {
using (var g = new Context (dst)) {
// - Clear any previous render from the destination
// - Copy the source to the destination
// - Blend the clouds over the source
g.Clear (r);
g.BlendSurface (src, r);
g.BlendSurface (temp, r.Location (), (BlendMode)CloudsData.BlendOps[Data.BlendMode]);
}
}
}
}