v1.3.0 - D3D12 & OpenGL Support

What's New

Multi-Graphics API Support

• D3D12 graphics binding (XR_KHR_D3D12_enable) — full support for Direct3D 12 applications
• OpenGL graphics binding (XR_KHR_opengl_enable) — full support for OpenGL applications
• GDI-based D3D12 preview — renders via offscreen RT + CPU readback + GDI StretchDIBits, avoiding DXGI Present hook conflicts with Steam overlay and UEVR

D3D12 Improvements

• Cross-queue synchronization between game and preview command queues
• Proper depth buffer handling with typeless formats and ALLOW_DEPTH_STENCIL
• Mutable format swapchain support (typeless backing for sRGB/non-sRGB views)
• Optimized clear values for render targets and depth buffers
• Copy region clipping to prevent out-of-bounds texture copies
• Device removed detection for diagnostics
• Reentrance guard in xrEndFrame to prevent stack overflow from hook recursion

Controller Input Emulation

• Basic controller input emulation for VR interaction testing
• Enhanced screenshot capture across all graphics backends (D3D11, D3D12, OpenGL)

Bug Fixes

• Write frame status before Present to avoid blocking on D3D12
• Always write first frame status for immediate diagnostics
• Reset swapchain image states to COMMON on release for correct D3D12 state tracking

Supported Graphics APIs

API	Binding Extension	Status
Direct3D 11	XR_KHR_D3D11_enable	✅ Supported
Direct3D 12	XR_KHR_D3D12_enable	✅ Supported
OpenGL	XR_KHR_opengl_enable	✅ Supported
Vulkan	XR_KHR_vulkan_enable	🗺️ Planned

v1.2.0 - UI Enhancements & MCP Integration

What's New

UI Enhancements

• Dark theme with modern styling
• Menu bar with View, Zoom, FOV, Tools, and Help menus
• Keyboard shortcuts for all major functions
• Mouse wheel zoom support

View Controls

• Switch between both eyes, left eye only, or right eye only
• Multiple display layouts: side-by-side, over/under, anaglyph 3D
• Adjustable zoom levels (25%, 50%, 75%, 100%, fit-to-window)
• FOV presets (70°, 90°, 110°)

MCP Integration

• Screenshot capture functionality
• Runtime status reporting via JSON
• Head pose control commands
• Python MCP server included for external tool integration

Build Improvements

• Updated CMakeLists.txt with improved configuration
• Added D3D12, dwmapi, and uxtheme library support
• Better output directory handling

Keyboard Shortcuts

• B - Both eyes view
• L/R - Left/Right eye only
• F - Fit to window
• 1-4 - Zoom presets
• 5-7 - FOV presets
• G - Toggle full render
• F1 - Controls help
• F3 - Toggle stats
• F12 - Screenshot

Full Changelog: v1.1.0...v1.2.0

v1.1.0 - Enhanced Movement Controls

What's Changed

Improvements

• Fixed movement direction with mouse + WASD controls
• Implemented proper quaternion-based rotation for movement vectors
• Fixed mouse yaw direction for natural camera control
• WASD movement now correctly follows head orientation including pitch

Technical Details

• Movement vectors are properly transformed by head rotation quaternion
• Mouse sensitivity provides smooth camera control
• All movement is now relative to the current view direction

Full Changelog: v1.0.0...v1.1.0

OpenXR Simulator v1.0.0

🎉 Initial Release

OpenXR Simulator is a lightweight OpenXR runtime that enables VR applications to run in a desktop window for development and testing without requiring a physical VR headset.

✨ Features

• Desktop VR Preview - Run VR applications in a resizable desktop window with side-by-side stereo view
• Mouse & Keyboard Controls - Navigate the virtual space using standard input devices
• Proper sRGB Handling - Automatic gamma correction for accurate color reproduction
• Unity Compatible - Fully tested with Unity's OpenXR plugin
• Minimal Dependencies - Only requires Windows and DirectX 11
• Easy Setup - Simple PowerShell scripts for registration/unregistration

📦 Installation

1. Download OpenXR-Simulator-v1.0.0-win64.zip
2. Extract to your preferred location
3. Run PowerShell as Administrator
4. Navigate to the scripts folder
5. Run .\register-runtime.ps1

🎮 Controls

• Mouse: Look around (hold right-click)
• WASD: Move forward/backward/strafe
• Q/E: Move up/down
• Shift: Move faster
• ESC: Release mouse capture

📋 Requirements

• Windows 10/11 (64-bit)
• DirectX 11 compatible GPU

🐛 Known Issues

• Limited to D3D11 applications (no OpenGL/Vulkan support yet)
• No hand tracking or haptic feedback
• Basic action system implementation

📝 Notes

This is a development tool designed for testing VR applications without a physical headset. For production VR experiences, use a proper VR headset and runtime.

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Full Changelog: Initial release