[metif12]

Summary

examples/mpv_player/
├── main.v                 # gg window: video rect + ui2-driven controls
├── mpv_gl_loader.v        # EGL proc selection (the Android fix)
├── mpv_render_d_mpv.c.v   # libmpv bindings, only with -d mpv
├── player_state.v         # headless PlayerState + build_player_ui()
├── mpv_gl_loader_test.v   # GLX regression tests
├── player_state_test.v    # seek/volume/UI-tree tests
└── README.md              # build matrix

Call flow per frame:

on_frame
  mpv_render_context_update
  mpv_render_context_render(FBO 0, flip_y=1)
  mpv_render_context_report_swap
  draw ui2-built controls with gg

The Android-only bug: glXGetProcAddress with C #if defined(__linux__)
matches Android too (NDK defines __linux__ + __ANDROID__), where GLX
does not exist. Render context creation failed, black video with working
audio. Fix: eglGetProcAddress on Linux/Android (sokol forces EGL via
SOKOL_FORCE_EGL), GLX guarded by
#if defined(__linux__) && !defined(__ANDROID__).

Evidence

• Before: loader returned GLX path on desktop design; C guard #if defined(__linux__) true on Android, glXGetProcAddress NULL, black video.
• After:
  • v test examples/mpv_player — 2 passed.
  • v -os android -check, -os linux -check — pass.
  • v -enable-globals -d mpv -os android/linux -check — pass.
  • Red/green: flipped loader to buggy value, test went FAIL, restored to OK.

Merge Danger

Door: two-way

Examples only, no library code touched. Stub builds without libmpv;
real backend behind -d mpv.

Blast Radius: examples