mirror of https://github.com/axmolengine/axmol.git
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/****************************************************************************
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Copyright (c) 2009 On-Core
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Copyright (c) 2010-2012 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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#include "CCGrabber.h"
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#include "base/ccMacros.h"
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#include "renderer/CCTexture2D.h"
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NS_CC_BEGIN
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Grabber::Grabber(void)
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: _FBO(0)
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, _oldFBO(0)
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{
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memset(_oldClearColor, 0, sizeof(_oldClearColor));
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// generate FBO
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glGenFramebuffers(1, &_FBO);
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}
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void Grabber::grab(Texture2D *texture)
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{
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &_oldFBO);
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// bind
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glBindFramebuffer(GL_FRAMEBUFFER, _FBO);
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// associate texture with FBO
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->getName(), 0);
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// check if it worked (probably worth doing :) )
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GLuint status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if (status != GL_FRAMEBUFFER_COMPLETE)
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{
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CCASSERT(0, "Frame Grabber: could not attach texture to framebuffer");
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}
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glBindFramebuffer(GL_FRAMEBUFFER, _oldFBO);
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}
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void Grabber::beforeRender(Texture2D *texture)
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{
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CC_UNUSED_PARAM(texture);
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glGetIntegerv(GL_FRAMEBUFFER_BINDING, &_oldFBO);
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glBindFramebuffer(GL_FRAMEBUFFER, _FBO);
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// save clear color
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glGetFloatv(GL_COLOR_CLEAR_VALUE, _oldClearColor);
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// FIXME: doesn't work with RGB565.
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glClearColor(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 Grabber 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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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// glColorMask(true, true, true, false); // #631
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}
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void Grabber::afterRender(cocos2d::Texture2D *texture)
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{
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CC_UNUSED_PARAM(texture);
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glBindFramebuffer(GL_FRAMEBUFFER, _oldFBO);
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// glColorMask(true, true, true, true); // #631
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// Restore clear color
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glClearColor(_oldClearColor[0], _oldClearColor[1], _oldClearColor[2], _oldClearColor[3]);
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}
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Grabber::~Grabber()
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{
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CCLOGINFO("deallocing Grabber: %p", this);
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glDeleteFramebuffers(1, &_FBO);
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}
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NS_CC_END
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