HOOPS 3DF 31.10

Overview

3DF 31.10 is a security‑focused maintenance release. It delivers critical third‑party library updates required by key partners (including Bentley) and continues our ongoing work to harden HSF handling against malformed or malicious files. This release is intended as the primary quarterly update for customers who need the latest CVE resolutions but are not on an LTS branch.

Technology Update

Platform Changes

  • Platform Deprecation Announcement: Support for Visual Studio 2019 (toolchain 14.2) and .Net 8 will be discontinued in 3DF 31.40. Continued support for this platform will only be available in 3DF 30-LTS beyond December 2026.
  • Platform Deprecation Announcement: Support for MacOS on Intel architecture will be discontinued starting with 3DF 32.00 and 30.80-LTS due to the end of support in MacOS 27.
  • Internal build and packaging scripts for 3DF 31.x have been updated to ensure consistent versioning across DLL/HDI binaries, continuing the work started in previous 28.xx/29.xx releases. These updates should be transparent for most integrators but may appear as changed DLL/HDI version metadata and updated SBOM output.

Third-Party Library Updates

Library New Version
libPNG v1.6.56
zlib v1.3.2

Library Compatibility Information

Library Name Version Windows Linux OS X Notes
DGN Direct 4.2 supported unsupported unsupported  
HOOPS Communicator 2025.4.0 supported unsupported unsupported HTML HIO only works with Visual Studio v142.
HOOPS Exchange 2026.3.0 supported supported unsupported  
HOOPS Luminate 2025.3.0 supported supported supported  
.NET Framework 4.8 supported unsupported unsupported Required for VS 2019 libraries and samples.
.NET Standard 2.0 supported unsupported unsupported Required for VS 2019 and 2022 libraries.
.NET Core 8.0 supported unsupported unsupported Required for VS 2022 samples.
Parasolid 35.1 supported supported unsupported  
Qt 6.5.3 supported unsupported unsupported  
Qt 5.12.7 unsupported supported unsupported Visualize is compatible with Qt 5.4 only on OSX
RealDWG 2023 supported unsupported unsupported RealDWG 2023 is only compatible with Visual Studio 2019 (v142 toolchain)
RealDWG 2025 supported unsupported unsupported RealDWG 2025 is only compatible with Visual Studio 2022 (v143 toolchain)
SketchUp 2023 supported unsupported unsupported 64-bit Windows only. Requires Visual Studio 2019 Redistributable.

Security & CVE resolution

This release focuses on dependency upgrades and rendering pipeline adjustments needed to resolve partner‑blocking CVEs and quality regressions:

  • Updated image‑handling dependencies (e.g., libPNG, zlib and related codecs) to versions that address known CVEs raised by Bentley and other partners.
  • Continued replacement / reduction of ImageMagick usage in favor of safer, better‑scoped image handling paths.
  • Ensured anti‑aliasing and rendering quality settings are preserved while applying security hardening, particularly for OpenGL2 / Mesa configurations where partners previously reported degraded visual quality.

These changes are primarily internal but may be visible as improved scan results in security tooling and slightly different behavior for malformed image or HSF content (see below).

HSF robustness & data‑integrity improvements

3DF 31.10 continues the work started in earlier 30.xx/31.xx releases to prevent corrupted or malicious HSF content from causing instability:

  • Strengthened validation when reading HSF streams, especially around user‑data blocks and size fields that previously could cause misalignment during parsing.
  • Ensured that corrupted data is rejected gracefully with a clear failure instead of leading to undefined behavior or access violations.
  • Aligned behavior across eDrawings‑style applications and the HOOPS 3D Part Viewer so that older HSF content either loads consistently or fails with the same error path.

These changes are designed to be non‑breaking for valid content, but applications may now refuse to load HSF files that were previously accepted despite being structurally invalid.

Deprecations

  • As part of efforts to resolve and reduce the risk of introducing CVEs the use of ImageMagick and related utilities are deprecated and will be removed over the coming two releases.

Fixed Bugs

Issue Description
SDHV-21055 Fix wrapping of return.
SDHE-22554 Add a default image in case of loading issue to prevent crash.
SDHV-21402 Fix tint management in color management.
SDHV-21418 Create a new tint texture to improve performance.
SDHV-21432 Add custom type for HICS wrapper to ensure type conversion and fix some DX11 closing stuff to remove warning and error on close.
SDHV-21443 Update LibPNG.
SDHV-21454 Improve reset mechanism on RDC reconnection.
SDHV-21457 Force graphical redraw when device changes.