- Add CommandQueue unit tests for WaitForIdle and synchronization
- Add SwapChain unit tests for Present and buffer operations
- Add Texture unit tests for various texture types and mipmaps
- Fix RHIIntegrationFixture with proper logging and debug output
- Update minimal integration test with RHI abstraction layer
- Add GT reference image for minimal test
- Update TEST_SPEC.md documentation
Add integration tests for RHI module:
- Add tests/RHI/integration/ directory with CMakeLists.txt
- Add RHIIntegrationFixture for shared test utilities
- Add minimal integration test (window creation, basic rendering)
- Add compare_ppm.py for image comparison
- Add run_integration_test.py test runner script
These integration tests verify the complete rendering pipeline
by comparing rendered output against ground truth PPM files.
1. Add ALLOW_RENDER_TARGET flag for color textures in CreateTexture
- This was the root cause of 5 failing RTV-related tests
- Without this flag, creating RTV caused device removal
2. Add FromD3D12() reverse conversion for Format enum
- GetFormat() was incorrectly casting DXGI_FORMAT to Format
- DXGI_FORMAT_R8G8B8A8_UNORM=28 but Format::R8G8B8A8_UNorm=3
- Added FromD3D12() to properly convert back
3. Update RHITestFixture to pre-create CommandQueue and Fence
- Prevents potential timing issues with GPU synchronization
4. Update RHITestFixture tests to pass correct format in ResourceViewDesc
- Previously passed empty desc.format=0 which caused issues
All 234 RHI unit tests now pass (117 D3D12 + 117 OpenGL)
