1554719 - Capture GL driver messages on panics

Status: NEW

(Core :: Graphics: WebRender, enhancement, P3)

Description

[Dzmitry Malyshau [:kvark]]

Current error propagation in WR assumes that no panic occurs: errors are accumulated in a vector and then returned from render() routine. WR bindings take that and issue the gfx critical error callback on each. This approach doesn't work when the driver panics, and we end up with no useful information to investigate.

Rough plan to solve this:

1. Expose the error callback to WR, use internally instead of collecting errors in a vector
2. Hook up glDebugMessageCallback with Error+ severity to this callback

This can be trivially tested by changing WR's GL operation to do something wrong and follow by a panic.