# 3DF 27.52

## Library Compatibility Information

Library Name | Version | Windows | Linux | OS X | Notes
--- | --- | --- | --- | --- | ---
DGN Direct | 4.2 |  |  |  |
HOOPS Communicator | 2022 SP1 |  |  |  |
HOOPS Exchange | 2024 |  |  |  |
HOOPS Publish | 2024 |  |  |  | Requires support for SSSE3 instruction set.
.NET Framework | 4.0 |  |  |  | v4.5 required for wpf_image and for WPF over Remote Desktop
Parasolid | 32.0.x |  |  |  |
Qt | 5.12.7 |  |  |  | Visualize is compatible with Qt 5.4 on OSX
RealDWG | 2019 |  |  |  | RealDWG 2019 is compatible with Visual Studio 2015 Update 3 and Visual Studio 2017 Update 2
SketchUp | 2021 |  |  |  | 64-bit Windows only. Requires Visual Studio 2019 Redistributable.

## Functional Changes

Screen extents computation. When any computation of screen extents is called, and no geometry is found without the screen extents, an invalid rectangle (instead of full window extents) will be returned.

Freetype upgrade. Upgraded Freetype v2.13.2 to address critical vulnerabilities and exposures.

Harfbuzz upgrade. Upgraded Harfbuzz v2.9.1 to address critical vulnerabilities and exposures.

libtiff upgrade. Upgraded libtiff to v4.6 to address critical vulnerabilities and exposures.

zlib upgrade. Upgraded zlib to v1.3 to address critical vulnerabilities and exposures.

## Fixed Bugs

Issue Number | Description
--- | ---
SDHV-20411 | libtiff is of version 3.6.1, while the latest is 4.5
SDHV-20359 | [HOOPS-3DF-27.50]: OpenGL2_Mesa driver not picking on Linux platforms [hoops_3df2750_linux64.tar.gz]
SDHV-20310 | Highlighted geometry not displayed properly during zoom in /zoom out /perspective projection.
SDHV-20303 | HC_MSet_Character_Attributes does crash with color map
SDHV-20258 | HC_Compute_Screen_Extent_By_Pat not working when entire geometry is out of view
SDHV-20216 | Markup text is not visible and selectable after 2023 SP2 upgrade
SDHV-20209 | Zlib 1.2.12 vulnerability (220701-000003)

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