v2.0.0

Advisories and Breaking Changes

Major breaking changes

• Due to the new unmanaged memory engine, we had to redesign our pixel processing and low level memory management API-s. The most visible change is that the GetPixelRowSpan() methods have been replaced with ProcessPixelRows() variants. This was done to guarantee memory safety. For more details see:
  • 2.0 documentation on Working with Pixel Buffers
  • 2.0 documentation on Memory Management
  • Pixel processing breaking changes & API discussion - #1739
• Png and Jpeg now decode to pixels formats closer to the encoded format when using the non-generic API. (For example Jpeg now decodes to Image<Rgb24> instead of Image<Rgba32>.) This was done to reduce memory usage and remove some surprises for users.
• We've dropped the old NetStandard 1.3 target. This targeted frameworks not supported by Microsoft and was adding overhead to development.

Complete list of breaking PR-s

• Add Abgr32 pixel type, extend IPixel - #1886 via @ynse01, @antonfirsov, @JimBobSquarePants
• Remove netstandard 1.3 target - #1888 via @JimBobSquarePants
• ImageFormatDetector Configuration Cleanup - #1936 via @JimBobSquarePants
• Unmanaged pooling MemoryAllocator - #1730 via @antonfirsov
• Png - Preserve Pixel Format for Non-generic decode. - #1861 via @JimBobSquarePants
• Decode Jpeg into Rgb24 when pixel type not specified. - #1773

Release Notes

API

• Remove HistogramEqualizationOptions.Default - #1840 via @antonfirsov
• Added missing CancellationToken parameters to Image - #1856 via @justinbhopper
• Expose ImageFrame.PixelBuffer - #1906 via @JimBobSquarePants
• Change the constructor of PixelTypeInfo and ImageMetadata from internal to public so that a user can implement IImageInfo - #1929 via @jz5, @antonfirsov, @JimBobSquarePants

Area:Build

• Update codcov and config - #1820 via @JimBobSquarePants
• Use a scheduled job for codecov - #1934 via @JimBobSquarePants

Area:Formats

• Add support for Portable Bitmap images - #1851 via @ynse01, @antonfirsov, @brianpopow, @JimBobSquarePants

Area:Performance

• Webp: Use byte arrays instead of Dictionary's for lookups - #1800 via @brianpopow
• Add sse2 version of select - #1804 via @brianpopow
• Add SSE2 versions of ClampedAddSubtractFull and ClampedAddSubtractHalf - #1805 via @brianpopow, @JimBobSquarePants
• SSE41 version of Hadamard transform - #1810 via @brianpopow
• Add SSE41 version of Quantize block - #1811 via @brianpopow
• Add SSE2 version of Mean16x4 - #1814 via @brianpopow
• Add SSE2 version of Vp8Sse4X4 - #1817 via @brianpopow
• Hoist some of the calculations from loops of 3DMoments() - #1818 via @kunalspathak, @brianpopow
• Add sse2 version of inverse transform - #1819 via @brianpopow, @JimBobSquarePants
• Add AVX version of CollectColorBlueTransforms and CollectColorRedTransforms - #1824 via @brianpopow, @JimBobSquarePants
• Add AVX version of TransformColor and TransformColorInverse - #1830 via @brianpopow, @JimBobSquarePants
• Webp improvements - #1846 via @brianpopow
• Jpeg new IDCT & fused zigzag/transpose steps - #1847 via @br3aker, @JimBobSquarePants
• Add AVX2 version of AddVector - #1849 via @brianpopow
• Add SSE41 version of UpSample - #1836 via @brianpopow, @JimBobSquarePants
• Add AVX2 versions of CombinedShannonEntropy - #1848 via @brianpopow
• Add SSE2 version of FTransform - #1852 via @brianpopow, @JimBobSquarePants
• Add AVX2 version of Vp8_Sse4X4 - #1860 via @brianpopow
• Jpeg codebase cleanup - #1853 via @br3aker
• Add AVX2 version of QuantizeBlock - #1857 via @brianpopow, @JimBobSquarePants
• Add SSE2 version of TransformOne and TransformTwo - #1862 via @brianpopow, @JimBobSquarePants
• Add SSE2 version for webp Filter methods - #1871 via @brianpopow, @JimBobSquarePants
• Add AVX2 version of CollectHistogram - #1882 via @brianpopow
• Add SSE2 and AVX2 versions of Vp8_Sse16X16 and Vp8_Sse16X8 - #1881 via @brianpopow, @JimBobSquarePants
• Add AVX2 version of GetResidualCost and SSE2 version of SetCoeffs - #1902 via @brianpopow
• SSE2 / AVX2 of webp AlphaDecoding - #1930 via @brianpopow, @JimBobSquarePants
• Jpeg encoder optimization via removing second transpose call from FDCT - #1958 via @br3aker

Bug

• Fix gaussian blurring changing the blur colour when transperancy is used - #1834 via @Turnerj
• Make ColorDistanceCache non-readonly - #1841 via @antonfirsov, @JimBobSquarePants
• Use Rgb24 for Async Jpeg Decode - #1859 via @JimBobSquarePants
• Fix Color conversion for differing types - #1865 via @JimBobSquarePants
• Allocate clean buffer in AnalyzeEntropy - #1873 via @brianpopow
• Fixed jpeg encoder last bytes flushing bug - #1876 via @br3aker
• Tiff: Add maximum IFD threshold - #1892 via @brianpopow
• Fixed Jpeg IDCT missing scalar implementation - #1922 via @br3aker
• Don't throw when Position is out of range. - #1907 via @JimBobSquarePants
• Jpeg ArgumentException fix - #1924 via @br3aker
• EXIF IDF pointer - #1923 via @IldarKhayrutdinov
• Fix for Jpeg Metadata Decoding with unknown APP13 profile - #1931 via @mkehoe, @JimBobSquarePants
• Only attempt to decode the first JFIF marker instance - #1933 via @JimBobSquarePants
• Fix for issue #1942 - #1944 via @brianpopow
• Ensure ResizeProcessor working buffer is contiguous - #1947 via @antonfirsov
• Correctly handle identity transforms with varying dimensions - #1945 via @JimBobSquarePants
• [EXIF] Support UCS2 and 8-byte encoded string tags - #1935 via @IldarKhayrutdinov, @JimBobSquarePants
• Fixed decoding grayscale jpegs with exotic sampling factors - #1979 via @br3aker, @JimBobSquarePants
• Fixed decoding grayscale jpegs with exotic sampling factors - #1979 via @br3aker, @JimBobSquarePants

Codequality

• Collapse AsSpan().Slice(..) calls into AsSpan(..) - #1815 via @turbedi, @brianpopow

Enhancement

• Support High Precision TPixel formats via Color - Boxed - #1801 via @JimBobSquarePants
• Convert OrientationMode into something usable. - #1976 via @JimBobSquarePants, @dlemstra

Formats:Jpeg

• Automatic SSE color converters based on Vector API - #1864 via @br3aker, @brianpopow, @JimBobSquarePants

Formats:Png

• PNG: Verify CRC of IDAT chunk is correct - #1898 via @brianpopow
• Added support for loading exif data from PNG "Raw profile type exif" text chunk - #1877 via @jubilant-enigma, @JimBobSquarePants

Formats:Webp

• Use Span in GetHTreeGroupForPos to avoid allocations - #1793 via @brianpopow
• Write exif profile with padding if needed - #1798 via @brianpopow
• Use helper methods to access clip tables - #1803 via @brianpopow
• Webp encoding: Reduce allocations. - #1799 via @brianpopow
• Make sure magick.net and imagesharp use the same configuration for webp encoding - #1808 via @brianpopow, @JimBobSquarePants
• Webp encoder now defaults to lossy, if nothing else is specified - #1961 via @brianpopow
• Add support for encoding lossy webp images with alpha channels - #1971 via @brianpopow

Other

• Add "decode to target size" skia variant to benchkarks - #1789 via @antonfirsov
• Support executing benchmarks on arm64 - #1794 via @kunalspathak, @JimBobSquarePants
• stackalloc header buffer in InternalDetectFormat - #1812 via @antonfirsov
• Some minor optimizations - #1828 via @turbedi
• Delete outdated benchmark.sh - #1833 via @antonfirsov
• Unified jpeg benchmark - #1844 via @br3aker
• Jpeg decoder mcu size fix - #1845 via @br3aker
• Remove QA from config [skip ci] - #1893 via @JimBobSquarePants
• Jpeg sampling factor validation #1894 - #1899 via @br3aker, @JimBobSquarePants
• Speed up DangerousGetRowSpan(y) - #1901 via @antonfirsov
• Remove return value documentation for void return types. - #1915 via @wischi-chr
• Jpeg HuffmanTable improvements - #1926 via @br3aker, @JimBobSquarePants
• Support for XMP metadata - #1918 via @ynse01, @JimBobSquarePants
• Add basic memory diagnostic API - #1969 via @antonfirsov, @JimBobSquarePants
• Add tiff and webp to the PackageTags - #1977 via @brianpopow, @dlemstra

Unit Tests

• Skip tests on none Sse2/Avx hardware - #1785 via @brianpopow
• Use Convert.To after rounding in Pack() to avoid different behavior on ARM vs x86/x64 - #1790 via @brianpopow
• Remove RunSerial from tests - #1885 via @brianpopow, @JimBobSquarePants
• Move RentReturnRelease_SubsequentRentReturnsDifferentHandles out of process - #1960 via @antonfirsov
• Disable RentReturnRelease_SubsequentRentReturnsDifferentHandles on Mac again - #1970 via @antonfirsov
• Fixed IDisposable leaks in jpeg decoder test suite. - #1974 via @br3aker

New Contributors

• @UltraNamahage made their first contribution in #1574
• @ynse01 made their first contribution in #1586
• @saucecontrol made their first contribution in #1601
• @TechnologicalPizza made their first contribution in #1630
• @br3aker made their first contribution in #1629
• @tompazourek made their first contribution in #1691
• @stephentoub made their first contribution in #1707
• @synercoder made their first contribution in #1766
• @kunalspathak made their first contribution in #1794
• @turbedi made their first contribution in #1815
• @justinbhopper made their first contribution in #1856
• @wischi-chr made their first contribution in #1915
• @jubilant-enigma made their first contribution in #1877
• @mkehoe made their first contribution in #1931
• @jz5 made their first contribution in #1929

Full Changelog: v1.0.4...v2.0.0