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null_surface(3) 		  Arcan Lua API 		 null_surface(3)

NAME
     null_surface - Create a minimalistic video object.

SYNOPSIS
     vid
     null_surface( startw, starth )

DESCRIPTION
     Null  surfaces  creates a normal textured video object that lacks a backing
     store and will therefore not be rendered in the normal draw pass,	although
     it can be used for clipping operations. It is primarily used as an interme-
     diate  stage  before using image_sharestorage  to share the backing storage
     between two objects. The null_sueface is also useful as a	property  anchor
     for creating object hierarchies.

NOTES
     1	    intial  starting  dimensions still need to be specified in order for
	    other lookup functions e.g. image_surface_initial_properties to work
	    properly.  dependencies

EXAMPLE
     function null_surface0()
	   a = null_surface(32, 32);
	   b = fill_surface(32, 32, 255, 0, 0);
	   show_image(b);
	   link_image(b, a);
	   moev_image(a, 100, 100, 100);
	   blend_image(a, 1.0, 100);
     end

MISUSE
     function null_surface0()
	   a = null_surface();
	   a = null_surface(-1, -1);
     end

SEE ALSO:
     fill_surface(3) image_sharestorage(3)

image				   August 2026			 null_surface(3)

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