The loss of Webgl context that remains unrecovered

I am facing an issue with the loss and restoration of webgl context.

My application is quite complex, containing a lot of data, graphs, lists, and maps.

Within the map section, I utilize webGL to ensure optimal performance. My code effectively manages the context lost and restored situations.

However, when initiating a large operation that involves loading data from the server and parsing it, sometimes the browser loses the webgl context. The challenge lies in the fact that the context is not always restored. It only seems to be restored upon repeating the same extensive operation.

From my perspective, this issue may be related to memory management and the timing of garbage collection.

Despite this awareness, I am uncertain about the steps to take in order to resolve this matter.

javascriptmemorywebgl

Answer №1

If you find yourself dealing with a lost canvas, one solution could involve recreating the canvas and reinitializing your application for the GL components. Despite the fact that all resources are wiped out, the additional workload of context recreation should not be too concerning, allowing you to promptly respond when the "webglcontextlost" event occurs.

(It's worth considering if this approach is the most optimal though...)

In response to Raziza's comment on WEBGL_lose_context:

Avoid using it in the manner suggested. This extension is primarily meant for debugging purposes and should only be utilized to replicate such scenarios.

For more information, refer to:

Answer №2

Discovered a method to manually trigger context restoration. Uncertain of the implications, but it's proven effective in my case.

The process involves utilizing the WEBGL_lose_context extension. More information on MDN

// Activating the extension
var ext = gl.getExtension("WEBGL_lose_context"); 

...
// Triggering context restoration 3 seconds after a context loss event
var restoreTimeout = setTimeout(function() { 
     ext.restoreContext(); 
}, 3000);

...
// Cancelling the timeout if context is restored through another means
restoreTimeout && clearTimeout(restoreTimeout);

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