GLSurfaceView中GL相关资源销毁问题

1. YY下传统的GLUT框架没有context概念,Main函数,Display,mouse,keyboarrd,reshape,这些回调函数中都可以直接调用OpenGL命令。纹理等gl相关资源需要自己管理,及时释放。从而防止显存不足,gl资源分配失败。。。2.Android GLSurfaceviewgl的context作用域只局限在GLSurfaceView.Renderer的onSurfaceCreated,onSurfaceChanged,onDrawFrame 三个函数中。其他函数都是UI线程中调用,如view的onPause,onResume这类。在这里调用会报如下错误:02-06 10:00:51.318: E/libEGL(4458): call to OpenGL ES API with no current context (logged once per thread)3.纹理等GL资源释放情况不需要自己释放,android自己管理。Activity的onPause调用了GLSurfaceView::onPause,此时只需要将所有缓存的gl对象句柄清零,,而不需要显式调用glDeleteXXX函数释放。例如纹理不需要glDeleteTextures释放,因为此时在UI线程中。下次onResume进入,创建方式两种:静态创建,在Renderer::onSurfaceCreated函数中,预创建所有需要纹理,各种XXO对象。关于该函数的描述:Since this method is called at the beginning of rendering, as well as every time the EGL context is lost, this method is a convenient place to put code to create resources that need to be created when the rendering starts, and that need to be recreated when the EGL context is lost. Textures are an example of a resource that you might want to create here.延迟到onDrawFrame中,发现纹理不可能用时重新动态创建。ref :

都可以…孔子的,老子的. 孙子的…都可以

GLSurfaceView中GL相关资源销毁问题

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