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rustVX Conformance Status

Khronos OpenVX Conformance Test Suite Results

Test Date: March 21, 2026
OpenVX Version: 1.3.1
CTS Version: Latest from KhronosGroup/OpenVX-cts

Summary

Metric Status
CTS Build ❌ Failed (Link stage)
API Coverage ~10% (~32/300+ functions)
Integration Tests ✅ 27/27 Passed
Overall Conformance ❌ Not Achieved

CTS Build Status

What Worked:

  • ✅ CMake configuration successful
  • ✅ Compilation of CTS framework successful
  • ✅ Rust library builds as C-compatible shared object

What Failed:

  • ❌ Link stage failed due to missing API functions

Missing Critical Functions

The CTS requires ~300 OpenVX API functions. Current implementation exports only ~32:

Image Operations (Missing)

  • vxCreateImage, vxCreateVirtualImage
  • vxQueryImage, vxSetImageAttribute
  • vxMapImagePatch, vxUnmapImagePatch
  • vxCreateImageFromHandle

Data Objects (Missing)

  • vxCreateScalar, vxQueryScalar
  • vxCreateArray, vxAddArrayItems, vxTruncateArray
  • vxCreateThreshold, vxSetThresholdAttribute
  • vxCreateConvolution, vxCopyConvolutionCoefficients
  • vxCreateMatrix, vxCopyMatrix
  • vxCreateLUT, vxCopyLUT
  • vxCreateDistribution
  • vxCreateRemap
  • vxCreateObjectArray

Graph/Node Management (Missing)

  • vxQueryNode, vxSetNodeAttribute
  • vxReleaseNode, vxRemoveNode
  • vxAssignNodeCallback
  • vxCreateGenericNode

Kernel Loading (Missing)

  • vxLoadKernels, vxUnloadKernels
  • vxGetKernelByName, vxGetKernelByEnum
  • vxQueryKernel, vxGetKernelParameterByIndex

Reference Management (Missing)

  • vxRetainReference
  • vxGetStatus
  • vxGetContext
  • vxQueryReference (partial)

Integration Test Results

All 27 custom integration tests passed:

Category Tests Status
Context 6 ✅ 6/6
Graph 8 ✅ 8/8
Vision Nodes 11 ✅ 11/11
Utilities 2 ✅ 2/2

What This Proves:

  • Core framework architecture is correct
  • C FFI bindings work properly
  • Reference counting is thread-safe
  • Graph execution model is sound

Vision Kernel Status

Current implementation has stubs for vision kernels, not actual algorithms:

Kernel Status
ColorConvert ❌ Stub (no actual conversion)
Gaussian3x3 ❌ Stub (no actual filtering)
Sobel3x3 ❌ Stub (no actual gradient)
OpticalFlowPyrLK ❌ Stub (no actual optical flow)
HarrisCorners ❌ Stub (no actual detection)

Path to Conformance

To achieve Khronos OpenVX Vision Conformance:

Phase 1: Complete API (Estimated: 2-3 weeks)

  1. Implement all 300+ C API functions
  2. Complete data object implementations
  3. Add missing query/set attribute functions

Phase 2: Vision Algorithms (Estimated: 4-6 weeks)

  1. Implement actual color conversion algorithms
  2. Implement filter algorithms (Gaussian, Sobel, etc.)
  3. Implement optical flow (Lucas-Kanade)
  4. Implement feature detection (Harris, FAST)
  5. Add SIMD optimizations (SSE2/AVX2/NEON)

Phase 3: CTS Validation (Estimated: 1-2 weeks)

  1. Fix CTS link errors
  2. Run full test suite
  3. Debug and fix failures
  4. Achieve passing conformance

Total Estimated Time: 7-11 weeks of focused development

Recommendation

This implementation is a solid proof-of-concept demonstrating:

  • ✅ Correct OpenVX architecture
  • ✅ Working C FFI layer
  • ✅ Proper Rust memory safety

For production use, significant additional development is required to:

  1. Complete the API surface
  2. Implement actual vision algorithms
  3. Optimize for performance
  4. Pass full Khronos conformance

References