Installs a callback
function that will be called for significant events relating to the given
this framebuffer.
The callback
will be used to notify when the system compositor is ready for this application to render a new frame. In this
case cogl_frame_event_sync will be passed as the event argument to the given callback
in addition to the FrameInfo corresponding to the frame beeing acknowledged by the
compositor.
The callback
will also be called to notify when the frame has ended. In this case
cogl_frame_event_complete will be passed as the event argument to the given callback
in addition to the
FrameInfo corresponding to the newly presented frame. The meaning of "ended" here simply
means that no more timing information will be collected within the corresponding FrameInfo
and so this is a good opportunity to analyse the given info. It does not necessarily mean that the GPU has finished rendering the
corresponding frame.
We highly recommend throttling your application according to cogl_frame_event_sync events so that your application can avoid wasting resources, drawing more frames than your system compositor can display.
this |
A Onscreen framebuffer |
callback |
A callback function to call for frame events |
destroy |
An optional callback to destroy |
user_data |
A private pointer to be passed to |
a FrameClosure pointer that can be used to remove the callback and associated
|