某些手机（Andreno gpu）上gpu渲染异常的问题。（文章原题：CCRenderTexture 从后台进入前台变黑的处理（android））

在android 中使用CCRenderTexture发现一个bug，

当任务从前台切换到后台，再从后台切换到前台时CCRenderTexture渲染的对象会变成黑色。

修正：

在CCPlatformMacros.h中找到

    #defineCC_ENABLE_CACHE_TEXTURE_DATA      1

将1改成0即可解决

帮助信息：

"Certain Qualcomm Andreno gpu's will retain data in memory after aframe buffer switch which corrupts the render to the texture. Thesolution is to clear the frame buffer before rendering to thetexture. However, calling glClear has the unintended result ofclearing the current texture. Create a temporary texture toovercome this. At the end of CCRenderTexture::begin(), switch theattached texture to the second one, call glClear, and then switchback to the original texture. This solution is unnecessary forother devices as they don't have the same issue with switchingframe buffers."

原文链接：http://blog.sina.com.cn/s/blog_6084f5880101bfcq.html

ps：

这个问题也有可能是应用从后台切到前台时候创建纹理不成功造成的，停一帧就好了。