GitLab

  - GraphicsItem.pixelVectors copies cached results before returning
  - Multiprocess fixes for Windows:
      - mmap/shm uses anonymous maps rather than tempfiles
      - avoid use of getppid and setpgrp
      - work around hmac authentication bug (use os.urandom to generate key)

Started new SVG exporter
Merged updates from ACQ4

   - ROI.movePoint now expects parent coordinates by default
   - Added ROI.getHandles()
   - Renamed MultiLineROI to MultiRectROI
   - Reorganized MultiRectROI, added addSegment and removeSegment methods (thanks Martin!)

Added functions.transformCoordinates() for mapping numpy arrays of coordinates from QTransform and QMatrix4x4

Minor updates:
- fixed SRTTransform3D.matrix()
- ViewBox fix: updateAutoRange leaves unused axes completely unchanged
- documentation updates

 - initialize ImageItem.menu
 - fixed default argument for ROI.getAffineSliceParams(axes)

  - ROI.getArrayRegion makes sure the ROI and image share the same scene
  - Added a few binary operator methods to metaarray 
  - Fixed flowchart/eq.py handling of metaarray objects

Minor documentation updates

  - Fixed some floating-point precision issues. (Added a workaround for QTransform.inverted() bug)
  - No longer putting asUnicode inside __builtin__ since this causes problems in some rare circumstances
    (pyshell, lazy import recipe)
  - Minor docstring updates

Added SRTTransform3D

(should be no major API changes here)

removed stray print statement

- Moved some functionality from UIGraphicsItem upstream to GraphicsItem

 - HistogramLUTItem avoids using lookup table if possible
 - GradientEditorItem has a method to ask whether the gradient is trivial (can be applied without the use of a lookup table)
 - ROI, LinearRegionItem, InfiniteLine no longer redraw for every mouse movement

 - disabled opengl (performance issues in Qt 4.7)
 - numerous caching changes (disabled deviceCoordinateCache due to performance issues)
 - speed up loading large images in ImageView
 - bugfixes from Ingo Breßler
 - Transform rotation bugfix
 - Added debug module
 - Major performance enhancements for scatterplot, fixed point clicking issues
     ** API change for scatterplot click signals
 - Drawing on ImageItem is working well now
 - PlotItem downsampling no longer uses scipy.signal.resample (this was creating artifacts)
 - Fixed ViewBox behavior when aspect-locked

 - numerous fixes in close() functions
 - added Transform class
 - ROI widgets now operate in degrees instead of radians for easier Qt compatibility

  - converted most old-style signals into new-style for PySide compatibility (beware: API changes)
  - removed ObjectWorkaround, now just using QGraphicsWidget
  - performance enhancements, particularly in ROI.getArrayRegion
  - numerous bugfixes

 - Lots of bug fixes
 - API change in PlotItem.plot(...)
 - Started replacing QObjectWorkaround with QWidget
 - Made plotCurveItems clickable
 - Added curve-following arrows

added scatter plots

 - added vertical lines / regions for plots
 - added gradient editor widget
 - many bugfixes
 - cleaned up imageview a bit