freedesktop.egl

// freedesktop.egl — behavioral test, runnable with no GPU and no display.
//
// Every FUNCTION and TYPE below comes from `import khronos.egl;`. <EGL/egl.h> is
// included for the EGL_* CONSTANTS only: they are macros, and no module can
// export a macro. So the file compiling is itself the first assertion — the
// module's export list has to cover everything used here — and the file
// linking is the second.
//
// ─────────────────────────────────────────────────────────────────────────
// EVERY ASSERTION HOLDS WITH ZERO VENDOR DRIVERS INSTALLED.
//
// libEGL is a DISPATCH: with no vendor it can answer questions about itself
// and nothing else. Upstream returns the empty string outright when the vendor
// list is empty (`libegl.c:928`), so an "it lists some EGL_EXT_ extension"
// check measures whether the MACHINE has a driver, not whether this package
// built libEGL. Vendor-dependent facts are reported below, or asserted only
// once their precondition is visibly met.
//
// ─────────────────────────────────────────────────────────────────────────
// THE PART THAT IS EASY TO GET FALSELY GREEN
//
// The ecosystem payload `xim:libglvnd` carries its own `libEGL.so.1` with the
// …