libvips 8.17.0

Release notes here:

https://www.libvips.org/2025/06/05/What's-new-in-8.17.html

Changes since 8.16.1:

• gifsave: add keep_duplicate_frames flag [dloebl]
• add Magic Kernel support [akimon658]
• tiff: add threadsafe warning/error handlers (requires libtiff 4.5.0+) [lovell]
• tiffload: add support for fail_on flag [lovell]
• tiffload: add support for unlimited flag (requires libtiff 4.7.0+) [lovell]
• much more reliable operation caching
• colour: add support for auto-selecting the rendering intent [kleisauke]
• add matrixmultiply
• better handling of malformed size values [Simcha Kosman]
• improve performance of vips_shrink() [kleisauke]
• svgload: add support for custom CSS via stylesheet option [lovell]
• heifload: unlimited flag removes all limits (requires libheif 1.19.0+) [lovell]
• heifsave: improve alpha channel detection [lovell]
• convi: ensure double sum precision for floats [lovell]
• improve guard against corrupt ICC profiles with older lcms2 versions [kleisauke]
• improve vips_sink_screen() thumbnail rendering
• heifload: improve detection of seek beyond EOF [lovell]
• jp2kload: add oneshot flag [mbklein]
• share and reuse openslide connections
• drop support for openslide 3.3
• fix vips_quadratic()
• rename thumbnail's export/import profile options as input/output for
  consistency
• restore vips_remosaic(), it was not being linked
• deprecate VipsSaveable, add VipsForeignSaveable
• move vips_image_preeval(), vips_image_eval(), vips_image_posteval() into the
  public API
• jxlsave: add support for chunked save (requires libjxl 0.9.0+)
• increase minimum version of libjxl dependency to 0.7.0
• increase minimum version of libheif dependency to 1.7.0
• improve scaling of hough_line feature space [ecbypi]
• heifload: limit per-image memory usage to 2GB (requires libheif 1.20.0+)
• svgload: add support for scRGB output via high_bitdepth flag [kstanikviacbs]
• remove vipsprofile from default install
• add ppmload_buffer [kleisauke]

Windows binaries here:

https://github.com/libvips/build-win64-mxe/releases/tag/v8.17.0

Thank you again to all the volunteers who worked hard on this release!