Map: zoomed-view symbols centred, 10x reveal and enemy range; progress screen on the menu background

- Megamap / TAB map zoomed view: heroes' markers and the other symbols
  (integer 200h centre immediates) follow the view's centre.
- Map reveal: the hero's reveal stamp scaled 10x (mods/mapreveal.cpp,
  docs/map-reveal.md); creatures on the zoomed map shown within 10x the
  sight range.
- Load / save progress screen drawn on the rock background across the full
  width, the picture blended over it (mods/loadingscreen.cpp); the classic
  1024x768 frame is gone.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/hud.md

@@ -101,6 +101,8 @@ widened instead, when the render size is applied (`PatchLayout`):
 | view centre (zoom frame, centred image) | 0x6ca53f, 0x6ca637, 0x6ca645 | 0x200 | width / 2 |
 | scroll centred on the hero; zoomed view; its quest markers | `[0x88e6fc]` (512.0) at 0x6c7bfe, 0x6cb27a, 0x6ccb7f, 0x6cf782 | 512 | own float |
 | zoomed view: other markers at 768 − d (centre + 256) | `[0x890040]` (768.0) at 0x6ce156 | 768 | width / 2 + 256 |
+| zoomed view: heroes' markers, 6 px quad at d + 509 / 515 (2026-10-25) | `[0x894780]` (509.0) at 0x6cf1bd, `[0x894778]` (515.0) at 0x6cf1dd | 512 ± 3 | centre ± 3 |
+| zoomed view: other symbols (quad, icons, labels) as integers (2026-10-25) | mov / add reg, 200h at 0x6ced82, 0x6cedb0, 0x6cf47a, 0x6cf4ac, 0x6cf5e4 | 0x200 | centre, rewritten when it changes |
 | dark band, right outer / inner edge | vertex immediates 0x6ca774, 0x6ca808 / 0x6ca7bc, 0x6ca84c | 1024 / 954 | width / width − 70 |
 
 The frame is child statics of the window (vector at +0x78..+0x7c; measured:

docs/map-reveal.md

@@ -0,0 +1,44 @@
+# Map reveal (fog of war)
+
+## Request (2026-10-25)
+
+"Can we increase the base vision range (for map fog of war reveal) by x10 or
+so?"
+
+## Measured
+
+- Each sector (64x64 tiles) keeps a 32x32 bit mask at +0x180 (128 bytes, one
+  bit per 2x2 tiles): `Sector_SetExplored` 0x622bf0, copied out by 0x622c60,
+  loaded from the save by 0x622c80 (0x606ae0). The zoomed map view turns it
+  into its fog texture (FOGOFWAR01.TGA, 0x639030).
+- `World_SetExplored` 0x638f00 (thiscall on `*0xad14e0`, (tile x, tile y,
+  explored), ret 0xc) finds the tile's sector; tiles >= 0x2000 and sectors
+  that aren't loaded are ignored.
+- `RevealAroundHero` 0x599730 (creature thiscall (tile x, tile y, sight), ret
+  0xc), called from about ten places in the creature code: only for the local
+  hero, only when its tile changed (last tile 0xad2384 / 0xad2388), it calls
+  `World_SetExplored` for every tile of a stamp centred on the hero. Sight 0:
+  the 29x29 circle at 0x88f5cc (radius 14 tiles). The callers choose 1 or 2
+  from the weather object (0x417e50: +0x9e0c set -> 2, 0x41ba90 true -> 1);
+  those use the 15x15 stamps at 0x88f328 + (sight - 1) * 225 (radius 7, 5;
+  a third one, radius 3, is unused).
+
+## Mod (`mods/mapreveal.cpp`)
+
+After the original revealed at a new tile, the same stamp scaled up 10x is
+revealed too, one cell (2x2 tiles) at a time through `World_SetExplored`: by
+day a circle of about 140 tiles radius, at night / in fog 70 / 50. About 15000
+cells per tile step by day. Sectors beyond the loaded ones are not marked.
+
+## Creatures on the map (2026-10-25)
+
+"Enemies on the TAB map don't show unless in very short range." The zoomed
+map view (0x6cc950, large map and TAB map) draws a creature off explored
+ground, or a hostile one, only within a sight range of the hero: |dx| and |dy|
+(world units, about 53.7 per tile) against a float at [esp+14h], 650 by
+default (0x6ce677), 300 where 0x63d280 holds for the hero's area (0x6ce6b5),
+350 when the weather object's 0x41ba40 is false (0x6ce6cf), plus a skill
+(0x355, 0x570d90) and equipment bonuses. Out of range only the debug flag
+0x182cdb8 & 2 shows them. The mod scales the three base values by 10 as well
+(about 120 tiles by day). The view only lists creatures of the sectors around
+the hero (25 entries at [esp+1ech]).

docs/screens.md

@@ -88,3 +88,21 @@ window's own pictures removed.
   offset 0 while the menu showed. Now only while the menu frame is drawn
   centred (it shifts the windows itself); otherwise dialogs are centred and
   their full-layout dimming stretched, as in a game.
+
+## Load / save progress screen (2026-10-25)
+
+Request: the progress screen shown while loading / saving should use the
+menu screens' background. The game's screen (`DxDriver7::LoadingScreen`
+`0x6469d0`, thiscall (progress, text)) draws with GDI into the back buffer's
+DC (surface +0xbc, GetDC vf 0x44 / ReleaseDC vf 0x68): the 1024x768 picture
+(HBITMAP +0x200) at 0, 0, the bar (+0x204 / +0x208) and the text at y 700,
+then Flip; it redraws only when the bar moves. Until now it was presented as
+a 1024x768 "classic" frame scaled to the monitor.
+
+`mods/loadingscreen.cpp`: before the game's drawing, `DrawBackground` across
+the whole render width in a scene of its own (`DxDriver7` BeginScene
+`0x646f50` / EndScene `0x646fd0`); the game's GDI drawing is moved to the
+centred 1024 frame with `SetViewportOrgEx` on the back buffer's DC, caught in
+`CreateCompatibleDC(hdc)` which the game calls right after getting it. Every
+frame is now presented at the full render width (borderless.cpp has one
+layout).

docs/todo.md

@@ -234,15 +234,17 @@ repeatable ones (ids 2600..3599, cloned by Quest_End) and DQ_ dynamic quests;
 which of them count for an area, and how the book groups by area, is still to
 be measured.
 
-## Megamap zoomed view: markers shifted (2026-10-25)
+## Megamap: zoom not centred on the hero (2026-10-25)
 
-Reported: on the M map, clicking a location to zoom in shows the markers on
-the zoomed map wrong / shifted (megamap.cpp).
+Reported: the zoomed view does not start centred on the hero. The game zooms
+on the large map's zoom point +0xc0438 (the mouse position, updated while the
+mouse is outside the zoom buttons +0xc0538; 0x6ca47b) plus the scroll. Open:
+how the user zoomed (buttons / key / click); then zoom on the hero for
+buttons and keys.
 
-## Load / save progress screen: rock background (2026-10-25)
+## Inventory drawn without its dark backgrounds (2026-10-25, intermittent)
 
-Reported: the progress screen shown while loading / saving does not use the
-rock-wall background of the other menu screens yet (hud::RenderMenuFrame,
-docs/screens.md). The GDI progress screen is DxDriver7_LoadingScreen
-0x6469d0 (1024x768, game/addresses.h); pictures PAK\loading0/1.bmp,
-loadgame.bmp, savegame.bmp, LoadingUW00/01.bmp.
+Reported twice: on opening the inventory the item list had no dark
+background behind the grid, and the tab texts had an odd background colour.
+Looks like render state (texture / blend / colour) left behind by an earlier
+draw; not reproduced yet. To find out: what was open or shown just before.

docs/widescreen.md

@@ -67,9 +67,10 @@ Elsewhere (unknown / UI, leave alone for now): `0x40694a`, `0x4ec036`,
 | `0x006469d0` | loading screen: GDI BitBlt of bitmap + progress bar + text into the back buffer (fixed 1024x768) | render thread |
 | `0x006a0c60` | video/intro playback (unexamined) | |
 
-The widescreen mod gives the loading screen a 1024x768 D3D viewport (set at
-`BeginScene` when the scene depth `+0x1d8` is 0) and the borderless mod
-presents only that area, scaled to the monitor. The main menu thread renders
+Since 2026-10-25 the loading screen uses the full render width too: the menu
+background is drawn across it and the game's GDI drawing is centred
+(mods/loadingscreen.cpp, docs/screens.md "Load / save progress screen"); the
+1024x768 "classic" viewport and present are gone. The main menu thread renders
 the full width since 2026-10-20: its 1024x768 frame is drawn centred on the
 menu screens' background (docs/screens.md, "Main menu frame").