Cameraship Map/Armor diagnostics: -tmr ladder, draw counter, CTCL type log

Investigating a field report that the cameraship secondary armor/score/map
screen showed its background BMP but no overlay graphics "on certain video
cards". The video card was a red herring: the machine was launched with
-ctcltype 2 (game pod) instead of 3 (cameraship), and the overlay block in
hudchat.cpp is gated on CTCL_GetType()==_ECTCL_CameraShip, so it never ran.

This is hard to spot because the two gates are independent. HSH_EnterFullScreen2
and CMR_Device open the screen and paint its background based purely on whether
a spare secondary monitor exists, and never consult the CTCL role. A wrong
-ctcltype therefore yields a screen that lights up, shows the correct artwork
and renders nothing, which is visually identical to a DirectDraw failure. The
same background-only screen also appears on a game pod when an MFD mode finds no
dual-head span and falls through to the single-secondary mr_device path.

Diagnostics added:

- render.cpp: log the CTCL type in gos-displays.txt from HSH_EnterFullScreen2,
  via the existing g_pfnCTCL_GetType hook so GameOS gains no game-code
  dependency. Always logged, and states in words whether overlays will be drawn.
- render.cpp/.hpp: CHSH_Device::m_nDrawCalls, incremented in DrawQuad,
  DrawThickFrame and DrawTexture, reset in CMR_Device::BeginScene and reported
  for the first 5 frames from CMR_Device::EndScene when -tmr is active. Zero
  draws proves the overlay code never ran; non-zero with a blank screen would
  mean it ran and drew invisibly. This distinction is what settled the case.
- render.cpp: log CMR_Device surface creation plus the overlay texture's
  dimensions, depth and channel masks.
- New -tmr <0-3> switch (MW4Application.cpp, documented in -help): 0 normal,
  1 background blit with DDBLTFAST_WAIT|DDBLTFAST_NOCOLORKEY, 2 Clear instead of
  the background blit, 3 as 2 plus alpha blending off and an untextured magenta
  DrawQuad.

Mode 3 drew magenta and mode 2 was pure black, which cleared the 3D device, the
flip and the background blit in two runs; the draw counter then reported 0 and
pointed straight at the gate. Documented as STEP 11 in CLAUDE.md, including the
field triage rule: read "CTCL type =" in gos-displays.txt before suspecting
drivers.

Co-authored-by: Claude Opus 5 (Anthropic) <noreply@anthropic.com>
Co-authored-by: GitHub Copilot <copilot@github.com>

Gameleap/code/mw4/Code/MW4Application/MW4Application.cpp

@@ -98,6 +98,9 @@ extern int g_nFpsLog;
 // [panelcoop] SetCooperativeLevel form used by the radar/MFD panels; 0 = legacy.
 // Defined in CoreTech GameOS render.cpp.
 extern int g_nHshCoopMode;
+// [mrdiag] Cameraship secondary-screen (Map/Armor) diagnostic mode; 0 = normal.
+// Defined in CoreTech GameOS render.cpp.
+extern int g_nMRDiag;
 extern LONG g_ThrottleDir;
 extern bool g_bCanSuicideAllways;
 extern bool g_f3dtarget;
@@ -881,6 +884,14 @@ static const char* const g_apszCommandLineHelp[] =
 "                                 panels never contend for it.",
 "                             5 = as 4, plus ALLOWREBOOT.",
 "                             Results are reported in gos-displays.txt.",
+"  -tmr <0-3>                 Cameraship Map/Armor screen diagnostics.",
+"                             0 = normal.",
+"                             1 = wait for the background blit to finish before",
+"                                 drawing the overlays.",
+"                             2 = skip the background image entirely.",
+"                             3 = as 2, plus a solid magenta test rectangle.",
+"                             Use when that screen shows its background but no",
+"                             overlay graphics or text.",
 "  -mechview <1|2>            Show the rotating mech view. 1 = on the radar",
 "  -mv <1|2>                  screen, 2 = on the main screen. Default: off.",
 "  -3dt                       Draw the MFD target as a live 3D model instead of",
@@ -1709,6 +1720,14 @@ int WINAPI WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int n
 		if ((0 <= n) && (n <= 5))
 			g_nHshCoopMode = n;
 	}
+	// [mrdiag] Cameraship Map/Armor screen diagnostics. 0 = normal behaviour.
+	token = strstr(all_lower, "-tmr ");
+	if (token && token[5])
+	{
+		int n = atoi(&token[5]);
+		if ((0 <= n) && (n <= 3))
+			g_nMRDiag = n;
+	}
 	// [fpslog] Enable the per-second frame pacing report written to gos-fps.txt.
 	g_nFpsLog = (strstr(all_lower, "-fps") != NULL) ? 1 : 0;
     g_bCanSuicideAllways = (strstr(all_lower, "-suicide") != NULL);