Hide the startup splash immediately after overlay initialization when a
render-pipeline capture is requested. This occurs before the frame
thread is released, so no EGL surface buffer can contain splash pixels.
Add a configurable stride to the synthetic transport and poison row
padding so incorrect row addressing is visible in captured output.
Cover full-frame and moving-damage BGRA uploads with 512-byte and
5120-byte pitches, and verify the advertised layout in the log.
Add an optional EGL framebuffer capture path for the test transport.
Capture the fully composed frame before presentation and retain its
surface format and HDR state for validation.
Add GoogleTest integration tests which run the production client
under a headless Weston compositor and compare every output pixel
against an independent reference implementation.
The matrix covers BGRA, RGBA, BGR32, RGB24, PQ RGBA10 and scRGB
RGBA16F with full, moving, overlapping, maximum-count, invalid, null
and zero-area damage rectangles. Validate HDR-to-SDR conversion and
native HDR output metadata when supported by the compositor.
Keep tests opt-in through ENABLE_RENDER_TESTS and document how to run
the software and native HDR tiers.
