可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):
问题:
Every time after I call glClear(GL_COLOR_BUFFER_BIT);
, I get the OpenGL error "invalid framebuffer operation".
The call seems to work just fine, and nothing seems wrong. I call glClear(GL_COLOR_BUFFER_BIT);
first thing in the ::paintGL()
method.
Huh? Should I just disregard this error?
回答1:
My best guess is that your framebuffer is not complete and calling glClear
on an incomplete framebuffer is throwing the error.
Check the status of the framebuffer using glCheckFramebufferStatus
and make sure it returns GL_FRAMEBUFFER_COMPLETE
.
回答2:
I was having this issue on osx using NSOpenGLView with a CVDisplayLink to trigger the render callback.
Be sure to wait for the NSOpenGLView to be fully displayed before starting rendering, i.e. :
-(void)viewDidAppear { [super viewDidAppear]; CVDisplayLinkStart(_displayLink); }
Doing it in viewDidLoad is too early.