function save_shader(){
	typeof shader_id_root == 'undefined' ? shader_id_root = "" : shader_id_root
	var params = {
		script: $("#shader").val(),
		image_url: $("#url").val(),
		username: user.username,
		name: $("#shader-name").val() || "",
		shader_id: shader_id_root
	}
	console.log(params)
	$.post("http://asdf.us/cgi-bin/im/shader/save", params, function(resp){
		console.log(resp);
		data = JSON.parse(resp)
		if (data.ERROR ){
			alert(data.ERROR)
			return false
		}
		if (! shader_id_root) {
			shader_id_root = data.id;
		}

		var blob = dataUriToBlob(cc.clone().resize(200,200).canvas.toDataURL("image/png"))
		var form = new FormData();

		form.append("id", data.id);
		form.append("qqfile", blob);
		$.ajax({
			url: "http://asdf.us/cgi-bin/im/shader/thumbnail_upload",
			type: "POST",
			data: form,
			processData: false,
			contentType: false,
		}).done(function(resp){
			console.log(resp);
		});

	})
	//maintain the shader_id_root...
	return shader_id_root; 
}