feat!: rename DisplayXR extensions XR_EXT_* → XR_DXR_*

CLAUDE.md

@@ -11,9 +11,9 @@ former `displayxr-unity-test*` repos (history preserved via `git subtree`).
 
 Samples:
 - `samples/birp-multipass` — Built-in RP, multi-pass stereo. Key `BiRPMultiPass`.
-- `samples/urp-singlepass-ui` — URP single-pass + `XrCompositionLayerWindowSpaceEXT` 2D UI. Key `URPSinglePassUI`.
+- `samples/urp-singlepass-ui` — URP single-pass + `XrCompositionLayerWindowSpaceDXR` 2D UI. Key `URPSinglePassUI`.
 - `samples/hdrp-singlepass-ui` — HDRP single-pass + 2D UI. Key `HDRPSinglePassUI`.
-- `samples/desktop-avatar` — URP Desktop Avatar showcase (transparency, click-through, per-eye foreground clip, `XR_EXT_display_zones`). Key `DesktopAvatar`.
+- `samples/desktop-avatar` — URP Desktop Avatar showcase (transparency, click-through, per-eye foreground clip, `XR_DXR_display_zones`). Key `DesktopAvatar`.
 
 ## The installer is shared — never fork it
 

README.md

@@ -11,9 +11,9 @@ Avatar** feature showcase.
 | Sample | Folder | Render pipeline / mode | Highlights |
 |---|---|---|---|
 | **BiRP Multi-Pass** | `samples/birp-multipass` | Built-in RP, multi-pass stereo | Baseline cube + rig-switching demo |
-| **URP Single-Pass + 2D UI** | `samples/urp-singlepass-ui` | URP, single-pass instanced | `XrCompositionLayerWindowSpaceEXT` 2D UI overlay |
+| **URP Single-Pass + 2D UI** | `samples/urp-singlepass-ui` | URP, single-pass instanced | `XrCompositionLayerWindowSpaceDXR` 2D UI overlay |
 | **HDRP Single-Pass + 2D UI** | `samples/hdrp-singlepass-ui` | HDRP, single-pass instanced | Same UI overlay as URP, on HDRP |
-| **Desktop Avatar** | `samples/desktop-avatar` | URP | Alpha-native transparency, click-through, per-eye foreground clip, `XR_EXT_display_zones` (3D zone + Local2D) |
+| **Desktop Avatar** | `samples/desktop-avatar` | URP | Alpha-native transparency, click-through, per-eye foreground clip, `XR_DXR_display_zones` (3D zone + Local2D) |
 
 ## Prerequisites
 

samples/birp-multipass/Assets/XR/Settings/OpenXR Package Settings.asset

@@ -295,8 +295,8 @@ MonoBehaviour:
   nameUi: DisplayXR
   version: 0.1.0
   featureIdInternal: com.displayxr.unity.feature
-  openxrExtensionStrings: XR_EXT_display_info XR_EXT_win32_window_binding XR_EXT_cocoa_window_binding
-    XR_EXT_atlas_capture
+  openxrExtensionStrings: XR_DXR_display_info XR_DXR_win32_window_binding XR_DXR_cocoa_window_binding
+    XR_DXR_atlas_capture
   company: DisplayXR
   priority: 0
   targetOpenXRApiVersion: 

samples/desktop-avatar/Assets/TigerHudMouseRouter.cs

@@ -3,7 +3,7 @@
 //
 // Input router for TigerTuningHUD's window-space-layer canvas.
 //
-// XrCompositionLayerWindowSpaceEXT submits pixels; it doesn't carry input.
+// XrCompositionLayerWindowSpaceDXR submits pixels; it doesn't carry input.
 // The wsui canvas is a private WorldSpace canvas on a hidden layer at
 // (0, 100000, 0), so Unity's EventSystem can't naturally see clicks on it.
 //

samples/desktop-avatar/Assets/TigerSpeechBubble.cs

@@ -16,7 +16,7 @@
 /// simple-window mode), split into two horizontal bands by
 /// <see cref="bubbleBandFraction"/> (default 0.25 = avatar's top-25% bubble /
 /// bottom-75% tiger):
-///   - 3D tiger zone = the bottom band → pushed as the XR_EXT_display_zones
+///   - 3D tiger zone = the bottom band → pushed as the XR_DXR_display_zones
 ///     3D-zone rect (and the legacy canvas sub-rect, for older runtimes /
 ///     the silhouette mapping). The runtime Kooima-frames the tiger into it.
 ///   - 2D bubble band = the top band → a DisplayXRLocal2D layer composited
@@ -376,7 +376,7 @@ void ApplyLayout()
     private void PushCanvasRect(int x, int y, int w, int h)
     {
         if (w <= 0 || h <= 0) return;
-        // XR_EXT_display_zones: push the 3D-zone rect so the runtime Kooima-frames
+        // XR_DXR_display_zones: push the 3D-zone rect so the runtime Kooima-frames
         // the tiger INTO this rect (the rect IS the canvas). The provider drives the
         // zone; the silhouette/click-through separately reads the canvas rect, so
         // push both.

samples/desktop-avatar/Assets/TransparentAutoSetup.cs

@@ -14,8 +14,8 @@
 public static class TransparentAutoSetup
 {
     // Must run BEFORE the OpenXR session is created — that's when the runtime
-    // reads transparentBackgroundEnabled off XrWin32WindowBindingCreateInfoEXT
-    // (Windows) / XrCocoaWindowBindingCreateInfoEXT (macOS) and decides
+    // reads transparentBackgroundEnabled off XrWin32WindowBindingCreateInfoDXR
+    // (Windows) / XrCocoaWindowBindingCreateInfoDXR (macOS) and decides
     // whether to use the transparent-capable swapchain path. AfterSceneLoad
     // is too late; SubsystemRegistration fires earlier than the XR loader init.
     //

samples/desktop-avatar/Assets/XR/Settings/OpenXR Package Settings.asset

@@ -296,8 +296,8 @@ MonoBehaviour:
   nameUi: DisplayXR
   version: 0.1.0
   featureIdInternal: com.displayxr.unity.feature
-  openxrExtensionStrings: XR_EXT_display_info XR_EXT_win32_window_binding XR_EXT_cocoa_window_binding
-    XR_EXT_atlas_capture XR_EXT_view_rig XR_EXT_local_3d_zone XR_EXT_display_zones
+  openxrExtensionStrings: XR_DXR_display_info XR_DXR_win32_window_binding XR_DXR_cocoa_window_binding
+    XR_DXR_atlas_capture XR_DXR_view_rig XR_DXR_local_3d_zone XR_DXR_display_zones
   company: DisplayXR
   priority: 0
   targetOpenXRApiVersion: 

samples/desktop-avatar/CLAUDE.md

@@ -50,7 +50,7 @@ All test-project components are runtime-wired by `TransparentAutoSetup` — ther
 
 The mechanism splits across plugin (most of it) and test-project (small bootstrap):
 
-1. **Transparent session** — `TransparentAutoSetup.RequestTransparentSession()` (called from `[RuntimeInitializeOnLoadMethod(SubsystemRegistration)]`) tells the plugin to ask for a transparent OpenXR session. The plugin sets `xsi.transparentBackgroundEnabled` on `XrWin32WindowBindingCreateInfoEXT` and opts the session into `XR_ENVIRONMENT_BLEND_MODE_ALPHA_BLEND` so Unity emits per-pixel alpha into the swapchain.
+1. **Transparent session** — `TransparentAutoSetup.RequestTransparentSession()` (called from `[RuntimeInitializeOnLoadMethod(SubsystemRegistration)]`) tells the plugin to ask for a transparent OpenXR session. The plugin sets `xsi.transparentBackgroundEnabled` on `XrWin32WindowBindingCreateInfoDXR` and opts the session into `XR_ENVIRONMENT_BLEND_MODE_ALPHA_BLEND` so Unity emits per-pixel alpha into the swapchain.
 2. **Alpha-native camera clear** — the overlay's `OnEnable` flips the camera to `CameraClearFlags.SolidColor` with `backgroundColor = (0,0,0,0)` so transparent regions emit `alpha=0` directly. No chroma color is involved anywhere. (Older plugin versions painted a gray chroma color and relied on a runtime post-weave conversion pass; that workaround was removed once the runtime's compose-under-bg + alpha-gate DP path shipped — tracked in `DisplayXR/displayxr-unity#103`.)
 3. **Per-pixel-alpha overlay HWND** — the plugin creates the overlay as a top-level `WS_POPUP` with `WS_EX_NOREDIRECTIONBITMAP`, so DWM has no opaque redirection surface and composites the HWND purely from the runtime's DComp visuals (real per-pixel alpha against the desktop). The runtime DP composes the captured desktop content under each tile pre-weave and alpha-gates post-weave, so anti-aliased silhouettes carry true soft alpha. The plugin explicitly strips `WS_EX_LAYERED` off Unity's HWND and does **not** call `SetLayeredWindowAttributes` / `LWA_COLORKEY`.
 4. **Per-pixel click-through** — `WM_NCHITTEST` in the native overlay reads `s_hit_active` (set by the C# polling code each frame). When the cyclopean ray hits the tiger silhouette → `s_hit_active=1` → `HTCLIENT` → overlay captures. Otherwise `HTTRANSPARENT` → click forwards to the underlying app via `forward_click_to_underlying_window` (`SetForegroundWindow` + `PostMessage`).

samples/desktop-avatar/README.md

@@ -8,7 +8,7 @@ see-through desktop avatar (cartoon tiger) rendered over the live screen on
 - **Alpha-native transparency** (the avatar composites over whatever is behind it)
 - **Click-through** — input passes to the apps beneath the transparent regions
 - **Per-eye foreground clipping**
-- **`XR_EXT_display_zones`** layout — the avatar is Kooima-projected into a 3D
+- **`XR_DXR_display_zones`** layout — the avatar is Kooima-projected into a 3D
   zone, with a **Local2D** speech-bubble zone alongside it
 
 Part of the [displayxr-unity-samples](https://github.com/DisplayXR/displayxr-unity-samples)

samples/desktop-avatar/URP_FOREGROUND_CLIP.md

@@ -73,7 +73,7 @@ a URP-guarded assembly) so every app gets per-eye URP foreground clip for free.
 ## Validation status (2026-06-14, Win64 / RTX 3080 / D3D12)
 
 Headless build + run on this machine against the installed DisplayXR runtime
-(active OpenXR runtime, advertises **`XR_EXT_view_rig` Version=2**):
+(active OpenXR runtime, advertises **`XR_DXR_view_rig` Version=2**):
 
 - ✅ C# + shader compile clean; `DisplayXR/ForegroundClipURP` is built into the Player.
 - ✅ `URPSetupBootstrap` creates the URP pipeline (depth texture on); Built-in→URP

samples/desktop-avatar/docs~/issue-82-hud.md

@@ -40,14 +40,14 @@ What we already know (from the v1.3.0 repro, see #82 for the full log tail):
 - In transparent mode, the `FINALv2` projection log shows all-zero values
   (FOV=0°, pos=0,0,0). Possibly a symptom of the same broken composition
   path, possibly unrelated — worth checking either way.
-- `xrCreateSession` injects `XrWin32WindowBindingCreateInfoEXT` with
+- `xrCreateSession` injects `XrWin32WindowBindingCreateInfoDXR` with
   `transparentBackgroundEnabled=1` and a non-zero `chromaKeyColor`. That
   selects the runtime's BitBlt (D3D11) or DComp (D3D12) swapchain path.
 - `wsui_hooked` separately calls `xrCreateSwapchain` for the overlay layer
   with format 28 (`DXGI_FORMAT_R8G8B8A8_UNORM`) and usage `COLOR_ATTACHMENT
   | SAMPLED`. That swapchain isn't part of the transparent BitBlt path.
 - `hooked_xrEndFrame` extends the original layer array with the wsui layer
-  via `XrCompositionLayerWindowSpaceEXT` and forwards to the runtime's
+  via `XrCompositionLayerWindowSpaceDXR` and forwards to the runtime's
   real `xrEndFrame`. The first such forwarded call is what dies.
 
 Probable causes (in rough likelihood order):
@@ -57,7 +57,7 @@ Probable causes (in rough likelihood order):
    transparent path leaves the main swapchain in. The `wsui_copy_to_swapchain_image`
    path in `native~/displayxr_d3d12_backend.cpp` relies on D3D12 common-state
    implicit promotion — may not hold under transparent compositor.
-2. The runtime can't compose an `XrCompositionLayerWindowSpaceEXT` over a
+2. The runtime can't compose an `XrCompositionLayerWindowSpaceDXR` over a
    transparent-background main layer; the layer-mixer code path was only
    exercised against opaque sessions. This would be a runtime-side bug —
    investigation may need to touch `DisplayXR/displayxr-runtime`.

samples/desktop-avatar/installer/DesktopAvatarInstaller.nsi

@@ -6,7 +6,7 @@
 !define SAMPLE_PRODUCT_EXE  "DisplayXR-DesktopAvatar"
 !define SAMPLE_DISPLAY_NAME "DisplayXR Unity Sample - Desktop Avatar"
 !define SAMPLE_SLUG         "unity_desktop_avatar"
-!define SAMPLE_DESCRIPTION  "Desktop avatar showcase - alpha-native transparency, click-through, per-eye foreground clip, and XR_EXT_display_zones (3D zone + Local2D speech bubble)."
+!define SAMPLE_DESCRIPTION  "Desktop avatar showcase - alpha-native transparency, click-through, per-eye foreground clip, and XR_DXR_display_zones (3D zone + Local2D speech bubble)."
 
 !ifndef VERSION
     !define VERSION "1.0.0"

samples/hdrp-singlepass-ui/Assets/Scripts/DisplayXRWsuiMouseRouter.cs

@@ -3,7 +3,7 @@
 //
 // Sample input router for DisplayXRWindowSpaceUI — NOT part of the plugin.
 //
-// `XrCompositionLayerWindowSpaceEXT` submits pixels and lets the runtime
+// `XrCompositionLayerWindowSpaceDXR` submits pixels and lets the runtime
 // composite them; it doesn't carry input. Unity's GraphicRaycaster works on
 // screen-space mouse coords against canvases that live in the screen's
 // coordinate space — but our wsui canvas is a private WorldSpace canvas

samples/hdrp-singlepass-ui/Assets/XR/Settings/OpenXR Package Settings.asset

@@ -295,8 +295,8 @@ MonoBehaviour:
   nameUi: DisplayXR
   version: 0.1.0
   featureIdInternal: com.displayxr.unity.feature
-  openxrExtensionStrings: XR_EXT_display_info XR_EXT_win32_window_binding XR_EXT_cocoa_window_binding
-    XR_EXT_atlas_capture XR_EXT_view_rig XR_EXT_local_3d_zone XR_EXT_display_zones
+  openxrExtensionStrings: XR_DXR_display_info XR_DXR_win32_window_binding XR_DXR_cocoa_window_binding
+    XR_DXR_atlas_capture XR_DXR_view_rig XR_DXR_local_3d_zone XR_DXR_display_zones
   company: DisplayXR
   priority: 0
   targetOpenXRApiVersion: 

samples/hdrp-singlepass-ui/CLAUDE.md

@@ -77,7 +77,7 @@ Two test-project scripts plus an editor bootstrap. The plugin contributes the ri
 The mechanism is shared between plugin and test-project:
 
 1. **Layer build (`DisplayXRTuningUI.OnEnable`):** creates a `Canvas` (`ScreenSpaceOverlay` initially), attaches `DisplayXRWindowSpaceUI` with fractional placement (`panelX`, `panelY`, `panelWidth`, `panelHeight`) and a fixed RT resolution of 1024 × 1024. The wsui flips the canvas to `WorldSpace`, parks it at `(0, 100000, 0)` on a hidden layer, and spins up an `OverlayCamera` that renders the canvas into its private RT.
-2. **Composition layer submission (plugin native):** each frame the plugin grabs the RT, hands it to the runtime as an `XrCompositionLayerWindowSpaceEXT` payload, and the runtime composes it on top of the stereo scene with the configured per-eye `disparity`.
+2. **Composition layer submission (plugin native):** each frame the plugin grabs the RT, hands it to the runtime as an `XrCompositionLayerWindowSpaceDXR` payload, and the runtime composes it on top of the stereo scene with the configured per-eye `disparity`.
 3. **Input bridge (`DisplayXRWsuiMouseRouter.Update`):** EventSystem can't see the wsui canvas because it's at world-space-far-away with no main-camera coverage. Router reads cursor coords from `DisplayXRPreviewInput` (editor) or `Input` (built), tests the wsui rect, maps to canvas-pixel coords, and dispatches `pointerDown` / `drag` / `pointerUp` / `pointerClick` directly via `ExecuteEvents`. It also strips any pre-existing `StandaloneInputModule` from `EventSystem.current` — that module throws every frame on the new Input System Package and corrupts EventSystem state for `GraphicRaycaster`.
 4. **Render-mode enumeration:** `DisplayXRTuningUI.TryEnumerateModes` calls `displayxr_standalone_enumerate_rendering_modes` (DllImport on `displayxr_unity`) to populate the cycle button. Retried from `Update` until the standalone session is up. Names come from `displayxr_standalone_get_rendering_mode_name`; synthesized fallback for older runtimes.
 

samples/hdrp-singlepass-ui/README.md

@@ -3,7 +3,7 @@
 The **HDRP** counterpart of the URP Single-Pass + 2D UI sample for the
 [DisplayXR Unity plugin](https://github.com/DisplayXR/displayxr-unity). Same
 window-space 2D UI overlay (`DisplayXRWindowSpaceUI` via
-`XrCompositionLayerWindowSpaceEXT`) and single-pass instanced stereo, rendered
+`XrCompositionLayerWindowSpaceDXR`) and single-pass instanced stereo, rendered
 through the High Definition Render Pipeline — used to catch HDRP-specific
 off-axis / projection regressions.
 

samples/urp-singlepass-ui/Assets/Scripts/DisplayXRWsuiMouseRouter.cs

@@ -3,7 +3,7 @@
 //
 // Sample input router for DisplayXRWindowSpaceUI — NOT part of the plugin.
 //
-// `XrCompositionLayerWindowSpaceEXT` submits pixels and lets the runtime
+// `XrCompositionLayerWindowSpaceDXR` submits pixels and lets the runtime
 // composite them; it doesn't carry input. Unity's GraphicRaycaster works on
 // screen-space mouse coords against canvases that live in the screen's
 // coordinate space — but our wsui canvas is a private WorldSpace canvas

samples/urp-singlepass-ui/Assets/XR/Settings/OpenXR Package Settings.asset

@@ -296,8 +296,8 @@ MonoBehaviour:
   nameUi: DisplayXR
   version: 0.1.0
   featureIdInternal: com.displayxr.unity.feature
-  openxrExtensionStrings: XR_EXT_display_info XR_EXT_win32_window_binding XR_EXT_cocoa_window_binding
-    XR_EXT_atlas_capture XR_EXT_view_rig XR_EXT_local_3d_zone XR_EXT_display_zones
+  openxrExtensionStrings: XR_DXR_display_info XR_DXR_win32_window_binding XR_DXR_cocoa_window_binding
+    XR_DXR_atlas_capture XR_DXR_view_rig XR_DXR_local_3d_zone XR_DXR_display_zones
   company: DisplayXR
   priority: 0
   targetOpenXRApiVersion: 

samples/urp-singlepass-ui/CLAUDE.md

@@ -11,7 +11,7 @@ Guidance for Claude Code when working in this repository.
 
 ## Project Overview
 
-This is the **window-space 2D UI test project** for the displayxr-unity plugin — exercises the `DisplayXRWindowSpaceUI` component, which submits a Unity `Canvas` as an `XrCompositionLayerWindowSpaceEXT` composition layer through the DisplayXR OpenXR runtime. Sibling Unity project that consumes the `com.displayxr.unity` UPM package.
+This is the **window-space 2D UI test project** for the displayxr-unity plugin — exercises the `DisplayXRWindowSpaceUI` component, which submits a Unity `Canvas` as an `XrCompositionLayerWindowSpaceDXR` composition layer through the DisplayXR OpenXR runtime. Sibling Unity project that consumes the `com.displayxr.unity` UPM package.
 
 The scene (`Assets/CubeTest.unity`) renders an animated cube on a tracked 3D display and overlays a **runtime-built tuning panel** (IPD slider, Scale slider, Render Mode cycle button) submitted as a window-space layer. The panel survives without Play Mode — `[ExecuteAlways]` keeps it alive under the editor's standalone preview window flow.
 
@@ -63,7 +63,7 @@ Two test-project scripts plus an editor bootstrap. The plugin contributes the ri
 The mechanism is shared between plugin and test-project:
 
 1. **Layer build (`DisplayXRTuningUI.OnEnable`):** creates a `Canvas` (`ScreenSpaceOverlay` initially), attaches `DisplayXRWindowSpaceUI` with fractional placement (`panelX`, `panelY`, `panelWidth`, `panelHeight`) and a fixed RT resolution of 1024 × 1024. The wsui flips the canvas to `WorldSpace`, parks it at `(0, 100000, 0)` on a hidden layer, and spins up an `OverlayCamera` that renders the canvas into its private RT.
-2. **Composition layer submission (plugin native):** each frame the plugin grabs the RT, hands it to the runtime as an `XrCompositionLayerWindowSpaceEXT` payload, and the runtime composes it on top of the stereo scene with the configured per-eye `disparity`.
+2. **Composition layer submission (plugin native):** each frame the plugin grabs the RT, hands it to the runtime as an `XrCompositionLayerWindowSpaceDXR` payload, and the runtime composes it on top of the stereo scene with the configured per-eye `disparity`.
 3. **Input bridge (`DisplayXRWsuiMouseRouter.Update`):** EventSystem can't see the wsui canvas because it's at world-space-far-away with no main-camera coverage. Router reads cursor coords from `DisplayXRPreviewInput` (editor) or `Input` (built), tests the wsui rect, maps to canvas-pixel coords, and dispatches `pointerDown` / `drag` / `pointerUp` / `pointerClick` directly via `ExecuteEvents`. It also strips any pre-existing `StandaloneInputModule` from `EventSystem.current` — that module throws every frame on the new Input System Package and corrupts EventSystem state for `GraphicRaycaster`.
 4. **Render-mode enumeration:** `DisplayXRTuningUI.TryEnumerateModes` calls `displayxr_standalone_enumerate_rendering_modes` (DllImport on `displayxr_unity`) to populate the cycle button. Retried from `Update` until the standalone session is up. Names come from `displayxr_standalone_get_rendering_mode_name`; synthesized fallback for older runtimes.
 

samples/urp-singlepass-ui/README.md

@@ -3,7 +3,7 @@
 Sample for the [DisplayXR Unity plugin](https://github.com/DisplayXR/displayxr-unity)
 on **URP** (single-pass instanced stereo) that exercises the **window-space 2D UI
 overlay** feature (`DisplayXRWindowSpaceUI`, plumbed through
-`XrCompositionLayerWindowSpaceEXT` in the runtime). The scene renders a textured
+`XrCompositionLayerWindowSpaceDXR` in the runtime). The scene renders a textured
 cube on a tracked 3D display and overlays a runtime-built UI panel (IPD slider,
 virtual-display-height slider, render-mode cycle button) as a window-space
 composition layer.

samples/urp-singlepass-ui/installer/URPSinglePassUIInstaller.nsi

@@ -6,7 +6,7 @@
 !define SAMPLE_PRODUCT_EXE  "DisplayXR-URP-SinglePass-UI"
 !define SAMPLE_DISPLAY_NAME "DisplayXR Unity Sample - URP Single-Pass + 2D UI"
 !define SAMPLE_SLUG         "unity_urp_singlepass_ui"
-!define SAMPLE_DESCRIPTION  "URP single-pass instanced stereo with an XrCompositionLayerWindowSpaceEXT 2D UI overlay - DisplayXR provider test."
+!define SAMPLE_DESCRIPTION  "URP single-pass instanced stereo with an XrCompositionLayerWindowSpaceDXR 2D UI overlay - DisplayXR provider test."
 
 !ifndef VERSION
     !define VERSION "1.0.0"