# DecalRender.DLL

## Origin
Factored out of the old **Inject.DLL** — the rendering functionality (texture creation,
font rendering, surface blitting) that previously lived inside Inject was moved into
this dedicated COM server.

## Binary Facts
- Size: **108 KB**
- Type: COM in-process server (DLL)
- Standard 4 COM exports: `DllCanUnloadNow`, `DllGetClassObject`, `DllRegisterServer`, `DllUnregisterServer`

## Key Imports
| DLL | Functions |
|-----|-----------|
| **Inject.DLL** | `BeginSceneO`, `EndSceneO` |
| **d3dx9_30.dll** | `D3DXCreateTexture`, `D3DXLoadSurfaceFromMemory`, `D3DXCreateFontW`, and others |

## What It Does
Provides the 2D rendering layer for Decal's overlay UI — creating textures, loading
surfaces from memory, and drawing text with DirectX fonts. Inject.DLL hooks the
Direct3D scene begin/end, and DecalRender plugs into those hooks to draw.

## Reconstruction Notes
- **LOOK AT:** `Managed/Decal.Interop.Render/` for the COM interface definitions
  this DLL must implement. That directory contains **19 decompiled C# files**
  describing every interface, enum, and coclass.
- **LOOK AT:** The old `Native/Inject/` source for rendering code that was likely
  moved here. Search for anything that touches `IDirect3DTexture9`, `ID3DXFont`,
  surface blitting, etc.
- The interop assembly will define the exact vtable layout the managed side expects.
  Every COM interface in `Decal.Interop.Render` maps to an interface this DLL exposes.