acdream/docs/research/2026-07-13-retail-paperdoll-slot-backgrounds-pseudocode.md

Retail paperdoll slot backgrounds — pseudocode

Date: 2026-07-13

Scope: the empty-cell art for the 21 currently supported equipment lists in gmPaperDollUI. This corrects the earlier visual inference that the slots had no per-location art. The paperdoll layout elements themselves inherit the same ItemList base, but retail creates their cells from distinct UIElement_UIItem prototypes in the shared catalog 0x21000037.

Retail anchors

• gmPaperDollUI::GetLocationInfoFromElementID @ 0x004A37F0 (named-retail/acclient_2013_pseudo_c.txt:173620) — exact paperdoll element-id to INVENTORY_LOC/EquipMask mapping.
• gmPaperDollUI::PostInit @ 0x004A5360 (named-retail/acclient_2013_pseudo_c.txt:175232) — binds each element as a single-cell UIElement_ItemList; hides only the nine armor lists in doll view.
• UIElement_ItemList::InternalCreateItem @ 0x004E3570 (named-retail/acclient_2013_pseudo_c.txt:231486) — resolves the UIItem catalog through enum-map 0x10000038, category 5, key 0x23, then clones the selected UIElement_UIItem prototype.
• UIElement_ItemList::ItemList_AddItem @ 0x004E3F50 and gmPaperDollUI::SetUIItemIntoLocation @ 0x004A5F90 — even an empty location is represented by a real UIItem cell in its list.
• Live DAT LayoutDesc 0x21000037 — each prototype's child 0x1000033B, state ItemSlot_Empty, supplies the exact 32×32 RenderSurface below.

The retained references/WorldBuilder tree has no UI implementation. ACE/ACViewer are interpretation aids for EquipMask and surface decoding; neither owns the retail paperdoll widget behavior. The named client plus live DAT are therefore the oracle.

Literal pseudocode

PaperDoll.PostInit:
    for every authored equipment-list element:
        list = GetChildRecursive(elementID).DynamicCast(UIElement_ItemList)
        RegisterItemListDragHandler(list, paperDoll)
        UpdateItemSlotTooltip(list, empty)

    hide the nine armor-location lists in doll view

ItemList.InternalCreateItem:
    prototypeID = GetAttribute_Enum(ItemListCellTemplate)
    catalog = GetByEnum(UIElementCatalog, LayoutDesc, UIItemCatalog)
    return CreateChildElement(list, catalog, prototypeID).DynamicCast(UIElement_UIItem)

PaperDoll.SetUIItemIntoLocation(itemID, locationMask):
    for each paperdoll slot whose location bit intersects locationMask:
        flush that slot's one-cell item list
        add itemID to that list
        update its tooltip

UIItem empty draw:
    draw prototype.child(0x1000033B).state(ItemSlot_Empty).image

Authored slot-template table

Paperdoll element	Equip location	UIItem prototype	Empty RenderSurface
0x100001DA	NeckWear	0x10000446	0x06000F68
0x100001DB	WristWearLeft	0x10000447	0x06000F5D
0x100001DC	FingerWearLeft	0x10000448	0x06000F5A
0x100001DD	WristWearRight	0x10000449	0x06000F6A
0x100001DE	FingerWearRight	0x1000044A	0x06000F6B
0x100001DF	weapon composite	0x1000044B	0x06000F66
0x100001E0	MissileAmmo	0x1000044C	0x06000F5E
0x100001E1	Shield	0x1000044D	0x06000F6C
0x100001E2	ChestWear	0x1000044E	0x060032C5
0x100001E3	UpperLegWear	0x1000044F	0x060032C4
0x1000058E	TrinketOne	0x1000058F	0x06006A6C
0x100005E9	Cloak	0x100005EA	0x0600708F
0x100005AB	HeadWear	0x100005B4	0x06006D7F
0x100005AC	ChestArmor	0x100005B5	0x06006D7B
0x100005AD	AbdomenArmor	0x100005B6	0x06006D79
0x100005AE	UpperArmArmor	0x100005B7	0x06006D87
0x100005AF	LowerArmArmor	0x100005B8	0x06006D81
0x100005B0	HandWear	0x100005B9	0x06006D7D
0x100005B1	UpperLegArmor	0x100005BA	0x06006D89
0x100005B2	LowerLegArmor	0x100005BB	0x06006D83
0x100005B3	FootWear	0x100005BD	0x06006D85

The three Aetheria lists remain outside the current controller scope (AP-108). Their authored backgrounds are blue/yellow/red prototypes 0x10000592..94, but this fix does not make those otherwise unimplemented slots reachable.

Port mapping

• PaperdollSlotBackgrounds is the single table for element-id, EquipMask, and UIItem prototype. PaperdollController consumes the same definitions for behavior, preventing the visual and equip-location maps from drifting apart.
• ItemListCellTemplate.ResolvePrototypeEmptySprite reuses the already-shipped inheritance-aware ItemSlot_Empty resolver instead of hardcoding surface IDs in the controller.
• RetailUiRuntime and UI Studio resolve the 21 surfaces from the live DAT once at bind time and inject them into the controller. A missing authored surface is a startup error rather than a silently generic slot; the old inventory-grid sprite remains only for isolated controller bindings that do not supply the paperdoll catalog map.