var Class = require('../../utils/Class'); 
var WebGLAttribute = require('./WebGLAttribute'); 
var programCount = 0; 
var WebGLProgram = new Class({ 
initialize: function WebGLProgram(renderer, vertexShader, fragmentShader){ 
this.id = programCount++ ; 
this.renderer = renderer; 
this.usedTimes = 1; 
this.vertexShaderSrc = vertexShader; 
this.fragmentShaderSrc = fragmentShader; 
this.program = this.createProgram(); 
this.attributes = this.getAttributes(); 
} 
,
createProgram: function (){ 
var gl = this.renderer.gl; 
var vertexShader = this.createShader(this.vertexShaderSrc, gl.VERTEX_SHADER); 
var fragmentShader = this.createShader(this.fragmentShaderSrc, gl.FRAGMENT_SHADER); 
var program = gl.createProgram(); 
gl.attachShader(program, vertexShader); 
gl.attachShader(program, fragmentShader); 
gl.linkProgram(program); 
var linked = gl.getProgramParameter(program, gl.LINK_STATUS); 
if (!linked) { 
console.warn('linkProgram failed: ', gl.getProgramInfoLog(program)); 
} 
return program; 
} 
,
createShader: function (source, type){ 
var gl = this.renderer.gl; 
var shader = gl.createShader(type); 
gl.shaderSource(shader, source); 
gl.compileShader(shader); 
var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); 
if (!compiled) { 
console.warn('compileShader failed: ', gl.getShaderInfoLog(shader), this.addLineNumbers(source)); 
} 
return shader; 
} 
,
addLineNumbers: function (string){ 
var lines = string.split('\n'); 
for (var i = 0; 
i < (_AN_Read_length('length', lines)); i++ ){ 
lines[i] = (i + 1) + ': ' + lines[i]; 
} 
return lines.join('\n'); 
} 
,
getAttributes: function (){ 
var gl = this.renderer.gl; 
var program = this.program; 
var attributes = { 
}
; 
var totalAttributes = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES); 
for (var i = 0; 
i < totalAttributes; i++ ){ 
var attribData = gl.getActiveAttrib(program, i); 
var name = attribData.name; 
var attribute = new WebGLAttribute(gl, program, attribData); 
attributes[name] = attribute; 
} 
return attributes; 
} 
}
); 
module.exports = WebGLProgram;