Aegisub/OverLua/docs/test3.lua

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function render_frame(f, t)
local surf = f.create_cairo_surface()
--raster.gaussian_blur(surf, t)--1+(1-math.cos(t*10))*2)
--raster.invert(surf)
--raster.separable_filter(surf, {-1, 3, -1}, 1)
--raster.directional_blur(surf, t, t/10)
raster.radial_blur(surf, 200, 200, t/60)
raster.pixel_value_map(surf, "0 =R 1 G - =G")
f.overlay_cairo_surface(surf, 0, 0)
surf = cairo.image_surface_create(200, 200, "rgb24")
raster.pixel_value_map(surf, "rand =t0 t0 =R t0 =G t0 =B")
f.overlay_cairo_surface(surf, 20, 20)
end