var LayerWebGLRenderer = function (renderer, layer, camera){ 
var children = layer.list; 
var childCount = _AN_Read_length('length', children); 
if (childCount === 0) { 
return ; 
} 
layer.depthSort(); 
renderer.pipelines.preBatch(layer); 
var layerHasBlendMode = (layer.blendMode !== -1); 
if (!layerHasBlendMode) { 
renderer.setBlendMode(0); 
} 
var alpha = layer.alpha; 
for (var i = 0; 
i < childCount; i++ ){ 
var child = children[i]; 
if (!child.willRender(camera)) { 
continue ; 
} 
var childAlphaTopLeft; 
var childAlphaTopRight; 
var childAlphaBottomLeft; 
var childAlphaBottomRight; 
if (child.alphaTopLeft !== undefined) { 
childAlphaTopLeft = child.alphaTopLeft; 
childAlphaTopRight = child.alphaTopRight; 
childAlphaBottomLeft = child.alphaBottomLeft; 
childAlphaBottomRight = child.alphaBottomRight; 
} 
 else { 
var childAlpha = child.alpha; 
childAlphaTopLeft = childAlpha; 
childAlphaTopRight = childAlpha; 
childAlphaBottomLeft = childAlpha; 
childAlphaBottomRight = childAlpha; 
} 
if (!layerHasBlendMode && child.blendMode !== renderer.currentBlendMode) { 
renderer.setBlendMode(child.blendMode); 
} 
var mask = child.mask; 
if (mask) { 
mask.preRenderWebGL(renderer, child, camera); 
} 
var type = child.type; 
if (type !== renderer.currentType) { 
renderer.newType = true ; 
renderer.currentType = type; 
} 
renderer.nextTypeMatch = (i < childCount - 1)? (children[i + 1].type === renderer.currentType): false ; 
child.setAlpha(childAlphaTopLeft * alpha, childAlphaTopRight * alpha, childAlphaBottomLeft * alpha, childAlphaBottomRight * alpha); 
child.renderWebGL(renderer, child, camera); 
child.setAlpha(childAlphaTopLeft, childAlphaTopRight, childAlphaBottomLeft, childAlphaBottomRight); 
if (mask) { 
mask.postRenderWebGL(renderer, camera); 
} 
renderer.newType = false ; 
} 
renderer.pipelines.postBatch(layer); 
} 
; 
module.exports = LayerWebGLRenderer;