render_thread_test is registered on MinGW (winpthreads provides the
fixture's pthreads and nanosleep; the core takes its Win32 path).
gl_render_thread_test gains the MinGW link path run_gl_scale_invariance.py
uses on test/gl-scale-invariance-windows (static SDL3, opengl32 and its
Win32 libraries, LTO, probe.exe), and a host with no window or GL 3.3 core
context (headless, Windows over SSH) exits 77 from a preflight run, reported
by CTest as a skip.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
gl_render_thread_test runs a scripted stream through the facade twice per
scale (1x, 4x): every value the guest reads back, native VRAM, the frame
at internal resolution and the native-wide surface must match with the
render thread off and on. The stream has mask set/check, a mask-checked
upload (per-pixel readback sync point), back-to-back uploads of one rect
with a catch-up between gpu.c's writes and its commit, ring wraps,
readback frames, presents, and widescreen tags that change per primitive
and are poisoned after each call. A slow render-thread present keeps the
replay a frame behind. It fails for each of: reading tags live, sharing
the upload source with the guest array, dropping the stream state.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shokunin