Martino Ferrari
6866457155
- loader: add available(), true only after load() has resolved every required entry point (false at the start of load()). Program::from_source and the other fallible constructors return ErrorCode::Unsupported while it is false, so a failed load() with a partially populated table can no longer fault on an unresolved entry point. - caps: GL_CONTEXT_PROFILE_MASK only exists from 3.2, so query it only on 3.2+ contexts. A 3.0/3.1 query latches GL_INVALID_ENUM in the context, which the next unrelated glGetError() (e.g. read_pixel) then reports as failure. - tests: gate the dlsym/libGL.so.1 fallback assertions on libGL being resolvable, so the GL suite also passes on a GLES-only host.