====================
Dynamically check whether to apply the fix for thumbnail generation.
Some QT5 version seem to be affected. This problem appears in some linux distributions with some window managers.
You may check/activate this fix:
>>> hgrp = App.ParamGet("User parameter:BaseApp/Preferences/Document")
>>> hgrp.GetBool("SaveThumbnailFix")
False
>>> hgrp.SetBool("SaveThumbnailFix",True)
>>> hgrp.GetBool("SaveThumbnailFix")
True
On Qt5, using pinch will inevitably cause tilt. It's annoying, so it is disabled by default.
In the future, it's best to introduce some kind of threshold to overcome for the tilt to be triggered.
Found via `codespell -q 3 --skip="*.po,*.ts,./.git,./src/3rdParty,./src/CXX,./src/zipios++,./src/Mod/Assembly/App/opendcm" -I ../fc-word-whitelist.txt` and `grep`
+ handle destruction of GL context in 3d viewer class
+ fix for OpenGL error message: 'Texture is not valid in the current context. Texture has not been destroyed'
+ disable VBO rendering in split views
+ activate multi-sampling in split view for manual alignment
+ share GL widget in case a document has multiple views to make VBO rendering work correctly
*First step to move Part rendering using VBO instead of direct rendering
*Update comments inside the code
*Assume VBO is available if OpenGL > 3.0 is detected
*Add initial Color support to VBO rendering !
*Initial full feature VBO rendering implementation
*Modify some include issue for linux build
*Try to fix linux include header
*Reupdate header include for linux support
*Fix compilation on linux
*Fix linux and MacoOS build
*Fix glGetString definition
*Fix Windows build
*Add VBO support as an option into the Preference menu
*Fix crash while running FreeCAD test bench with new VBO rendering infrastructure (in both cases)
*Improve performances
*Compute material index only when a VBO update is required (improve frame rate by 10%)
*Clean the code
*Fix Travis compilation warning
*Try to fix Windows compilation issue
*Update include for Windows
The previous code assumed the user's unit system was MKS. The updated code uses
schemaTranslate() to convert from screen units to the user's chosen system.
