mirror of
https://github.com/tiennm99/fbird.git
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111 lines
3.8 KiB
JavaScript
Vendored
111 lines
3.8 KiB
JavaScript
Vendored
/****************************************************************************
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Copyright (c) 2008-2010 Ricardo Quesada
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Copyright (c) 2011-2012 cocos2d-x.org
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Copyright (c) 2013-2014 Chukong Technologies Inc.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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/**
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* FBO class that grabs the the contents of the screen
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* @class
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* @extends cc.Class
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*/
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cc.Grabber = cc.Class.extend({
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_FBO:null,
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_oldFBO:null,
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_oldClearColor:null,
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_gl:null,
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/**
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* constructor of cc.Grabber
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*/
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ctor:function () {
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cc.sys._checkWebGLRenderMode();
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this._gl = cc._renderContext;
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this._oldClearColor = [0, 0, 0, 0];
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this._oldFBO = null;
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// generate FBO
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this._FBO = this._gl.createFramebuffer();
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},
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/**
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* grab
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* @param {cc.Texture2D} texture
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*/
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grab:function (texture) {
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var locGL = this._gl;
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this._oldFBO = locGL.getParameter(locGL.FRAMEBUFFER_BINDING);
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// bind
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locGL.bindFramebuffer(locGL.FRAMEBUFFER, this._FBO);
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// associate texture with FBO
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locGL.framebufferTexture2D(locGL.FRAMEBUFFER, locGL.COLOR_ATTACHMENT0, locGL.TEXTURE_2D, texture._webTextureObj, 0);
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// check if it worked (probably worth doing :) )
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var status = locGL.checkFramebufferStatus(locGL.FRAMEBUFFER);
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if (status !== locGL.FRAMEBUFFER_COMPLETE)
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cc.log("Frame Grabber: could not attach texture to frmaebuffer");
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locGL.bindFramebuffer(locGL.FRAMEBUFFER, this._oldFBO);
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},
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/**
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* should be invoked before drawing
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* @param {cc.Texture2D} texture
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*/
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beforeRender:function (texture) {
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var locGL = this._gl;
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this._oldFBO = locGL.getParameter(locGL.FRAMEBUFFER_BINDING);
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locGL.bindFramebuffer(locGL.FRAMEBUFFER, this._FBO);
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// save clear color
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this._oldClearColor = locGL.getParameter(locGL.COLOR_CLEAR_VALUE);
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// BUG XXX: doesn't work with RGB565.
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locGL.clearColor(0, 0, 0, 0);
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// BUG #631: To fix #631, uncomment the lines with #631
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// Warning: But it CCGrabber won't work with 2 effects at the same time
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// glClearColor(0.0f,0.0f,0.0f,1.0f); // #631
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locGL.clear(locGL.COLOR_BUFFER_BIT | locGL.DEPTH_BUFFER_BIT);
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// glColorMask(true, true, true, false); // #631
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},
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/**
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* should be invoked after drawing
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* @param {cc.Texture2D} texture
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*/
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afterRender:function (texture) {
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var locGL = this._gl;
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locGL.bindFramebuffer(locGL.FRAMEBUFFER, this._oldFBO);
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locGL.colorMask(true, true, true, true); // #631
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},
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/**
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* delete FBO
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*/
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destroy:function(){
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this._gl.deleteFramebuffer(this._FBO);
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}
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});
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