Test GL calls - Githubissues

gregtatum / rugl

Declarative Stateless OpenGL in Rust

MIT License

39 stars 2 forks source link

Test GL calls #4

Open gregtatum opened 7 years ago

gregtatum commented 7 years ago

Need to come up with some way to ensure that the code has the correct behavior. Possible approaches to look into.

Manually mock the GL API and seeing what gets set.
Do a full draw, then pixel test the results, slower tests, more boiler plate, but tractable.
Research and find some existing testing situation where you could introspect the gl state.

alteous commented 7 years ago

glium is currently the most popular crate for OpenGL. Consider investigating their tests.

The author, @tomaka, wrote a detailed post-mortem of what he felt went wrong with glium. His main grievance was that 'drivers are still crippled with bugs' (sic) and cannot be trusted. Whatever tests are written should take this into account.