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platform profile + gauge dev-composite (Milestone A: gauge renderer woken)

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PLATFORM PROFILE (-platform pod|dev / BT_PLATFORM / run.cmd pod; default dev):
an env-preset selector, NOT a code fork -- it picks which environment the
existing video/gauge/input code reads.  dev = single 800x600 window + keyboard
(the working build); pod = RIO input + (on real hardware) the multi-surface
gauges/MFDs, mirroring content/SETENV.BAT (the pod path -- FindBestAdapterIndices
/ SVGA16 -- is left untouched).  The multi-surface needs the pod's 2 video cards,
so -platform pod does NOT auto-enable L4GAUGE on a dev box (stays bootable,
single-window).  Also fixes a real engine bug: SVGA16::BuildWindows
PostQuitMessage'd on a CreateDevice failure but fell through to a null-device
deref (segfault) -- now breaks (inert on the pod).

GAUGE DEV-COMPOSITE, Milestone A (option B; opt-in BT_DEV_GAUGES, default OFF):
wake the (dormant) gauge renderer so its CPU-rastered pixelBuffer can later be
composited into the dev window, WITHOUT touching the pod SVGA16 output path.
SVGA16 does no per-surface D3D in this mode (a DevGaugeComposite() gate forces
the no-surface path + short-circuits Update/Refresh).  Waking the never-exercised
gauge subsystem exposed 4 latent reconstruction bugs, each guarded:
SVGA16::Update / Refresh (empty mSurfaces[]), LBE4ControlsManager::MakeLinkedLamp
(NULL lamp manager), L4GaugeRenderer::NotifyOfNewInterestingEntity (garbage
warehouse chain).  It now boots STABLY; the gauge reconstruction is incomplete
(shadowed lamp-manager + warehouse members) -- Milestone B (the composite pass)
will reveal whether the content is real.  See docs/GAUGE_COMPOSITE.md.

Verified: default DEV un-regressed (combat DESTROYED, 0 crashes); pod path
untouched; BT_DEV_GAUGES boots stable.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-06 10:18:40 -05:00
co-authored by Claude Opus 4.8
parent 8b36440d05
commit c13e72d0ba
7 changed files with 314 additions and 11 deletions
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engine/MUNGA_L4/L4CTRL.cpp
+7
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@@ -2054,6 +2054,13 @@ Lamp *
L4LampManager
*lamp_manager = (L4LampManager *) application->
GetGaugeRenderer()->GetLampManager();
// DEV-COMPOSITE GUARD: when the gauge renderer is woken (BT_DEV_GAUGES) but its
// reconstructed lamp manager isn't wired (GetLampManager returns NULL -- a recon
// offset gap in BTL4GaugeRenderer), skip the linked cockpit lamp rather than
// constructing an L4Lamp with a NULL manager (crashes in LampManager::AddLamp).
// The lamp is a secondary cockpit indicator; inert on the pod (manager valid).
if (lamp_manager == NULL)
return NULL;
Check(lamp_manager);
Lamp