请问窗口只有一层吗？ - Project1

WindowLayer.prototype._canvasClearWindowRect = function(renderSession, window) {
};
WindowLayer.prototype._webglMaskWindow = function(renderSession, window) {
};
WindowLayer.prototype._renderCanvas = function(renderSession) {
if (!this.visible) {
return;
}
if (!this._tempCanvas) {
this._tempCanvas = document.createElement('canvas');
}
this._tempCanvas.width = Graphics.width;
this._tempCanvas.height = Graphics.height;
var realCanvasContext = renderSession.context;
var context = this._tempCanvas.getContext('2d');
context.save();
context.clearRect(0, 0, Graphics.width, Graphics.height);
context.beginPath();
context.rect(this.x, this.y, this.width, this.height);
context.closePath();
context.clip();
renderSession.context = context;
for (var i = 0; i < this.children.length; i++) {
var child = this.children[i];
if (child._isWindow && child.visible && child.openness > 0) {
this._canvasClearWindowRect(renderSession, child);
context.save();
child._renderCanvas(renderSession);
context.restore();
}
}
context.restore();
renderSession.context = realCanvasContext;
renderSession.context.setTransform(1, 0, 0, 1, 0, 0);
renderSession.context.globalCompositeOperation = 'source-over';
renderSession.context.globalAlpha = 1;
renderSession.context.drawImage(this._tempCanvas, 0, 0);
for (var j = 0; j < this.children.length; j++) {
if (!this.children[j]._isWindow) {
this.children[j]._renderCanvas(renderSession);
}
}
};
WindowLayer.prototype._renderWebGL = function(renderSession) {
if (!this.visible) {
return;
}
var gl = renderSession.gl;
if (!this._vertexBuffer) {
this._vertexBuffer = gl.createBuffer();
}
this._dummySprite._renderWebGL(renderSession);
renderSession.spriteBatch.stop();
gl.enable(gl.STENCIL_TEST);
gl.clear(gl.STENCIL_BUFFER_BIT);
this._webglMaskOutside(renderSession);
renderSession.spriteBatch.start();
for (var i = 0; i < this.children.length; i++) {
var child = this.children[i];
if (child._isWindow && child.visible && child.openness > 0) {
gl.stencilFunc(gl.EQUAL, 0, 0xFF);
child._renderWebGL(renderSession);
renderSession.spriteBatch.stop();
this._webglMaskWindow(renderSession, child);
renderSession.spriteBatch.start();
}
}
gl.disable(gl.STENCIL_TEST);
for (var j = 0; j < this.children.length; j++) {
if (!this.children[j]._isWindow) {
this.children[j]._renderWebGL(renderSession);
}
}
};

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