shader

1 files changed, 28 insertions, 6 deletions

diff --git a/js/shader.js b/js/shader.js
index a6937b7..b829a0d 100644
--- a/js/shader.js
+++ b/js/shader.js
@@ -1,7 +1,29 @@
-(function(){
+var shader = (function(){
+	var fn_str, fn, lex
+	var exports = {}
+	
+	exports.init = function(){
+		lex = new Lex (0, 0)
+		exports.build(demo_shader.innerHTML)
+	}
+	exports.build = function (fn_str){
+		new_fn = new Function('lex', 'x', 'y', fn_str)
+		try {
+			new_fn(lex, 0, 0)
+		}
+		catch (e) {
+			throw 'Shader execution error'
+		}
+		exports.fn = fn = new_fn
+		return fn
+	}
+	exports.run = function(canvas){
+		canvas.forEach(function(lex, y, x){
+			fn(lex, x, y)
+			lex.build()
+		})
+	}
+	
+	return exports
 
-	var fn_str = demo_shader.innerHTML
-	var shader = new Function('lex', 'x', 'y', fn_str)
-
-	window.shader = shader
-})()
\ No newline at end of file
+})()