The current DWI::Fixel_map<> class (to be deprecated in the future) contains at index 0 a fixel with an empty constructor. Any diagnosis information presented to the user should therefore be computed without consideration for this non-existing fixel.

Changes in 2be257c made as part of #3011 resulted in there being two separate attempts to construct an Image class from the same input header.
Fixes #3171.

MR::Axes::permutations_type: Fix is_identity()

Follows #2609.

fsl.check_first(): Handle run_first_all providing no HOLDID

Pipe image format: Revise error message

mrcalc: Docs: Combining mag&phase into complex data

mesh2voxel: Accept >3D image as template voxel grid

- unlock() must hold the mutex because it writes lockcentres[idx].second
- ~SpatialLock() should also lock before clearing lockcentres to avoid a race if another thread is concurrently in try_lock()/unlock().

This class holds a reference and relies on its destructor to call `unlock`. The default copy/move will copy idx and the reference leading to double unlock() calls.

ParticlePool::size() was a const accessor that read pool.size() and avail.size() without taking the pool mutex. Other threads can call create()/destroy() which modify pool/avail under the mutex.

tck2connectome: Add default assignment mechanism to docs

Use an unsigned integer 3D texture for the ROI (GL_R8UI) to store a
0/1 mask without normalization. Previously, we were using an integer
sampler with a GL_R8 texture leading to erraneous behaviour on MacOS. 
Any future code interacting with the ROI texture must avoid trying to 
enable filtering and use integer sampler to read from it.

Instead of using `glMultiDrawArrays`, which doesn't guarantee that draw 
calls will be executed in a batched fashion, we use `glDrawElements` 
with an index buffer. This fixes the performance issues seen on MacOS 
when visualising tractograms.

See https://programming4.us/multimedia/8302.aspx

Qt5 links to both OpenGL and AGL for OpenGL apps, but AGL is no longer included in MacOS Tahoe/Xcode26 (https://bugreports.qt.io/browse/QTBUG-137687). This will cause our configure script to fail on latest macOS. This issue will not be addressed in future Qt5 versions (only in Qt6), but we can work around it by explicitly linking only to OpenGL.

Problem introduced in 92eee2a as part of #283.

Fixes for new GA releases workflow

We need to rebind the intended EBO for the current chunk of streamlines 
before drawing. Fixes streamline glitch when ODFs are loaded.

The latest version of Eigen (v5) requires C++17, while we only support 
C++11 on master.

Explicitly install eigen3 for macOS CI tests

Fix OpenGL state clobbering when rendering streamlines

Update copyright to 2026

In particular this includes resolving #3215 and #2755.

Resolves new test in #3172 merged into #3255 with the change in test data filesystem structure introduced in #2235.