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gauges: secondary/radar MFD composites live on a dev box (Milestone B)

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The pod's secondary/radar cockpit surface now renders as an inset in the
800x600 dev window under BT_DEV_GAUGES: radar/tactical grid, SPEED/HEADING/
MAGNETIC/PROP dials, and the color-coded ARMOR DAMAGE mech schematic -- real
gauge content (nzSec=27247), composited from the shared CPU pixelBuffer.

Composite pass (engine): SVGA16::DrawDevInset palette-expands the secondary
plane into a MANAGED texture on the MAIN device and draws an XYZRHW inset quad;
BTDrawGaugeInset() reaches the gauge renderer's 'sec' port and is called from
DPLRenderer::ExecuteImplementation as the last draw before EndScene.

Three reconstruction bugs fixed to get real content:
1. BTL4Application::MakeGaugeRenderer signature mismatch (REAL fix): the
   reconstructed no-arg override only HID the 2007-engine's widened 3-arg
   virtual MakeGaugeRenderer(int*,int*,int*), so the engine built a base
   L4GaugeRenderer whose ctor never parsed gauge/l4gauge.cfg -> empty symbol
   table -> "undefined label 'bhk1Init'" -> no ports/gauges. Matched the 3-arg
   signature so it truly overrides (args ignored; BT is fullscreen). Same bug
   class as the BTL4GaugeRenderer(false,NULL,NULL,NULL) ctor fix.
2. Parse hung on undefined primitives (gated dev accommodation): the BT gauge
   primitive table (BTL4MethodDescription) is still a stub, so an unknown
   primitive -> ReportParsingError -> Fail() -> a MODAL dialog freezing the
   parse. Under BT_DEV_GAUGES, skip the unknown primitive's params so labels
   register and the base "configure" primitive builds the ports.
3. Gauge widgets AV on NULL data bindings (gated): NumericDisplayScalar's NULL
   value_pointer -> GaugeConnectionDirectOf ctor deref (bind NULL->static zero);
   RankAndScore::Execute derefs unreconstructed game state (Gauge::GuardedExecute
   SEH wrapper -> Disable(True) on first fault).

All guards gated on BT_DEV_GAUGES: default DEV un-regressed (TARGET DESTROYED,
0 crashes) and the pod path is byte-unchanged (strict Fail, no guards).

Remaining (docs/GAUGE_COMPOSITE.md): the real gauge WIDGET reconstruction
(BTL4MethodDescription method table + gauge->game-state data bindings), then
Step 2 (RP<->BT MFD port-name reconcile) + Step 3 (2-window layout).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-06 10:59:45 -05:00
co-authored by Claude Opus 4.8
parent c13e72d0ba
commit a256813395
10 changed files with 308 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
engine/MUNGA/GAUGE.cpp
+39 -1
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@@ -568,7 +568,24 @@ Logical
//-----------------------------------------
// Execute gauge code
//-----------------------------------------
Execute();
{
// BT DEV-GAUGES bring-up: run Execute() under SEH so a gauge whose
// game-state binding isn't reconstructed yet is DISABLED (rate=0)
// after its first fault instead of AV'ing every frame. Gated on
// BT_DEV_GAUGES; the pod build calls Execute() directly.
static int s_devGaugesUpd = -1;
if (s_devGaugesUpd < 0)
s_devGaugesUpd = (getenv("BT_DEV_GAUGES") != NULL) ? 1 : 0;
if (s_devGaugesUpd)
{
if (!GuardedExecute())
Disable(True);
}
else
{
Execute();
}
}
actually_ran = True;
}
Check_Fpu();
@@ -581,6 +598,27 @@ void
Fail("Gauge::Execute not overridden");
}
//
// GuardedExecute -- BT DEV-GAUGES bring-up. Run Execute() under a structured
// exception handler so a gauge whose game-state data binding is not yet
// reconstructed is skipped instead of AV'ing the whole game. (A separate
// function because __try/__except may not share a frame with C++ objects that
// require unwinding, which Gauge::Update does.) Returns False on fault.
//
Logical
Gauge::GuardedExecute()
{
__try
{
Execute();
return True;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return False;
}
}
struct TierLookup
{
GaugeRate rate;