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+- 8/4/2022: version 1.2.4
+ This is a binary compatible release.
+ * restore CMake libwebpmux target name for compatibility with 1.2.2 (#575)
+ * fix lossless crunch mode encoding with WEBP_REDUCE_SIZE
+ (chromium: #1345547, #1345595, #1345772, #1345804)
+
+- 6/30/2022: version 1.2.3
+ This is a binary compatible release.
+ * security fix for lossless encoder (#565, chromium:1313709)
+ * improved progress granularity in WebPReportProgress() when using lossless
+ * improved precision in Sharp YUV (-sharp_yuv) conversion
+ * many corrections to webp-lossless-bitstream-spec.txt (#551)
+ * crash/leak fixes on error/OOM and other bug fixes (#558, #563, #569, #573)
+
+- 1/11/2022: version 1.2.2
+ This is a binary compatible release.
+ * webpmux: add "-set bgcolor A,R,G,B"
+ * add ARM64 NEON support for MSVC builds (#539)
+ * fix duplicate include error in Xcode when using multiple XCFrameworks in a
+ project (#542)
+ * doc updates and bug fixes (#538, #544, #548, #550)
+
+- 7/20/2021: version 1.2.1
+ This is a binary compatible release.
+ * minor lossless encoder improvements and x86 color conversion speed up
+ * add ARM64 simulator support to xcframeworkbuild.sh (#510)
+ * further security related hardening in libwebp & examples
+ (issues: #497, #508, #518)
+ (chromium: #1196480, #1196773, #1196775, #1196777, #1196778, #1196850)
+ (oss-fuzz: #28658, #28978)
+ * toolchain updates and bug fixes (#498, #501, #502, #504, #505, #506, #509,
+ #533)
+ * use more inclusive language within the source (#507)
+
+- 12/23/2020: version 1.2.0
+ * API changes:
+ - libwebp:
+ encode.h: add a qmin / qmax range for quality factor (cwebp adds -qrange)
+ * lossless encoder improvements
+ * SIMD support for Wasm builds
+ * add xcframeworkbuild.sh, supports Mac Catalyst builds
+ * import fuzzers from oss-fuzz & chromium (#409)
+ * webpmux: add an '-set loop <value>' option (#494)
+ * toolchain updates and bug fixes (#449, #463, #470, #475, #477, #478, #479,
+ #488, #491)
+
+- 12/18/2019: version 1.1.0
+ * API changes:
+ - libwebp:
+ WebPMalloc (issue #442)
+ - extras:
+ WebPUnmultiplyARGB
+ * alpha decode fix (issue #439)
+ * toolchain updates and bug fixes
+ (chromium: #1026858, #1027136, #1027409, #1028620, #1028716, #995200)
+ (oss-fuzz: #19430, #19447)
+
+- 7/4/2019: version 1.0.3
+ This is a binary compatible release.
+ * resize fixes for Nx1 sizes and the addition of non-opaque alpha values for
+ odd sizes (issues #418, #434)
+ * lossless encode/decode performance improvements
+ * lossy compression performance improvement at low quality levels with flat
+ content (issue #432)
+ * python swig files updated to support python 3
+ Tool updates:
+ vwebp will now preserve the aspect ratio of images that exceed monitor
+ resolution by scaling the image to fit (issue #433)
+
+- 1/14/2019: version 1.0.2
+ This is a binary compatible release.
+ * (Windows) unicode file support in the tools (linux and mac already had
+ support, issue #398)
+ * lossless encoder speedups
+ * lossy encoder speedup on ARM
+ * lossless multi-threaded security fix (chromium:917029)
+
+- 11/2/2018: version 1.0.1
+ This is a binary compatible release.
+ * lossless encoder speedups
+ * big-endian fix for alpha decoding (issue #393)
+ * gif2webp fix for loop count=65535 transcode (issue #382)
+ * further security related hardening in libwebp & libwebpmux
+ (issues #383, #385, #386, #387, #388, #391)
+ (oss-fuzz #9099, #9100, #9105, #9106, #9111, #9112, #9119, #9123, #9170,
+ #9178, #9179, #9183, #9186, #9191, #9364, #9417, #9496, #10349,
+ #10423, #10634, #10700, #10838, #10922, #11021, #11088, #11152)
+ * miscellaneous bug & build fixes (issues #381, #394, #396, #397, #400)
+
+- 4/2/2018: version 1.0.0
+ This is a binary compatible release.
+ * lossy encoder improvements to avoid chroma shifts in various circumstances
+ (issues #308, #340)
+ * big-endian fixes for decode, RGBA import and WebPPictureDistortion
+ Tool updates:
+ gifwebp, anim_diff - default duration behavior (<= 10ms) changed to match
+ web browsers, transcoding tools (issue #379)
+ img2webp, webpmux - allow options to be passed in via a file (issue #355)
+
+- 11/24/2017: version 0.6.1
+ This is a binary compatible release.
+ * lossless performance and compression improvements + a new 'cruncher' mode
+ (-m 6 -q 100)
+ * ARM performance improvements with clang (15-20% w/ndk r15c, issue #339)
+ * webp-js: emscripten/webassembly based javascript decoder
+ * miscellaneous bug & build fixes (issue #329, #332, #343, #353, #360, #361,
+ #363)
+ Tool updates / additions:
+ added webpinfo - prints file format information (issue #330)
+ gif2webp - loop behavior modified to match Chrome M63+ (crbug.com/649264);
+ '-loop_compatibility' can be used for the old behavior
+
+- 1/26/2017: version 0.6.0
+ * lossless performance and compression improvements
+ * miscellaneous performance improvements (SSE2, NEON, MSA)
+ * webpmux gained a -duration option allowing for frame timing modification
+ * new img2webp utility allowing a sequence of images to be converted to
+ animated webp
+ * API changes:
+ - libwebp:
+ WebPPictureSharpARGBToYUVA
+ WebPPlaneDistortion
+ - libwebpmux / gif2webp:
+ WebPAnimEncoderOptions: kmax <= 0 now disables keyframes, kmax == 1
+ forces all keyframes. See mux.h and the gif2webp
+ manpage for details.
+
+- 12/13/2016: version 0.5.2
+ This is a binary compatible release.
+ This release covers CVE-2016-8888 and CVE-2016-9085.
+ * further security related hardening in the tools; fixes to
+ gif2webp/AnimEncoder (issues #310, #314, #316, #322), cwebp/libwebp (issue
+ #312)
+ * full libwebp (encoder & decoder) iOS framework; libwebpdecoder
+ WebP.framework renamed to WebPDecoder.framework (issue #307)
+ * CMake support for Android Studio (2.2)
+ * miscellaneous build related fixes (issue #306, #313)
+ * miscellaneous documentation improvements (issue #225)
+ * minor lossy encoder fixes and improvements
+
+- 6/14/2016: version 0.5.1
+ This is a binary compatible release.
+ * miscellaneous bug fixes (issues #280, #289)
+ * reverted alpha plane encoding with color cache for compatibility with
+ libwebp 0.4.0->0.4.3 (issues #291, #298)
+ * lossless encoding performance improvements
+ * memory reduction in both lossless encoding and decoding
+ * force mux output to be in the extended format (VP8X) when undefined chunks
+ are present (issue #294)
+ * gradle, cmake build support
+ * workaround for compiler bug causing 64-bit decode failures on android
+ devices using clang-3.8 in the r11c NDK
+ * various WebPAnimEncoder improvements
+
+- 12/17/2015: version 0.5.0
+ * miscellaneous bug & build fixes (issues #234, #258, #274, #275, #278)
+ * encoder & decoder speed-ups on x86/ARM/MIPS for lossy & lossless
+ - note! YUV->RGB conversion was sped-up, but the results will be slightly
+ different from previous releases
+ * various lossless encoder improvements
+ * gif2webp improvements, -min_size option added
+ * tools fully support input from stdin and output to stdout (issue #168)
+ * New WebPAnimEncoder API for creating animations
+ * New WebPAnimDecoder API for decoding animations
+ * other API changes:
+ - libwebp:
+ WebPPictureSmartARGBToYUVA() (-pre 4 in cwebp)
+ WebPConfig::exact (-exact in cwebp; -alpha_cleanup is now the default)
+ WebPConfig::near_lossless (-near_lossless in cwebp)
+ WebPFree() (free'ing webp allocated memory in other languages)
+ WebPConfigLosslessPreset()
+ WebPMemoryWriterClear()
+ - libwebpdemux: removed experimental fragment related fields and functions
+ - libwebpmux: WebPMuxSetCanvasSize()
+ * new libwebpextras library with some uncommon import functions:
+ WebPImportGray/WebPImportRGB565/WebPImportRGB4444
+
+- 10/15/15: version 0.4.4
+ This is a binary compatible release.
+ * rescaling out-of-bounds read fix (issue #254)
+ * various build fixes and improvements (issues #253, #259, #262, #267, #268)
+ * container documentation update
+ * gif2webp transparency fix (issue #245)
+
+- 3/3/15: version 0.4.3
+ This is a binary compatible release.
+ * Android / gcc / iOS / MSVS build fixes and improvements
+ * lossless decode fix (issue #239 -- since 0.4.0)
+ * documentation / vwebp updates for animation
+ * multi-threading fix (issue #234)
+
+- 10/13/14: version 0.4.2
+ This is a binary compatible release.
+ * Android / gcc build fixes
+ * (Windows) fix reading from stdin and writing to stdout
+ * gif2webp: miscellaneous fixes
+ * fix 'alpha-leak' with lossy compression (issue #220)
+ * the lossless bitstream spec has been amended to reflect the current code
+
+- 7/24/14: version 0.4.1
+ This is a binary compatible release.
+ * AArch64 (arm64) & MIPS support/optimizations
+ * NEON assembly additions:
+ - ~25% faster lossy decode / encode (-m 4)
+ - ~10% faster lossless decode
+ - ~5-10% faster lossless encode (-m 3/4)
+ * dwebp/vwebp can read from stdin
+ * cwebp/gif2webp can write to stdout
+ * cwebp can read webp files; useful if storing sources as webp lossless
+
+- 12/19/13: version 0.4.0
+ * improved gif2webp tool
+ * numerous fixes, compression improvement and speed-up
+ * dither option added to decoder (dwebp -dither 50 ...)
+ * improved multi-threaded modes (-mt option)
+ * improved filtering strength determination
+ * New function: WebPMuxGetCanvasSize
+ * BMP and TIFF format output added to 'dwebp'
+ * Significant memory reduction for decoding lossy images with alpha.
+ * Intertwined decoding of RGB and alpha for a shorter
+ time-to-first-decoded-pixel.
+ * WebPIterator has a new member 'has_alpha' denoting whether the frame
+ contains transparency.
+ * Container spec amended with new 'blending method' for animation.
+
+- 6/13/13: version 0.3.1
+ This is a binary compatible release.
+ * Add incremental decoding support for images containing ALPH and ICCP chunks.
+ * Python bindings via swig for the simple encode/decode interfaces similar to
+ Java.
+
+- 3/20/13: version 0.3.0
+ This is a binary compatible release.
+ * WebPINewRGB/WebPINewYUVA accept being passed a NULL output buffer
+ and will perform auto-allocation.
+ * default filter option is now '-strong -f 60'
+ * encoding speed-up for lossy methods 3 to 6
+ * alpha encoding can be done in parallel to lossy using 'cwebp -mt ...'
+ * color profile, metadata (XMP/EXIF) and animation support finalized in the
+ container.
+ * various NEON assembly additions
+ Tool updates / additions:
+ * gif2webp added
+ * vwebp given color profile & animation support
+ * cwebp can preserve color profile / metadata with '-metadata'
+
+- 10/30/12: version 0.2.1
+ * Various security related fixes
+ * cwebp.exe: fix import errors on Windows XP
+ * enable DLL builds for mingw targets
+
+- 8/3/12: version 0.2.0
+ * Add support for ARGB -> YUVA conversion for lossless decoder
+ New functions: WebPINewYUVA, WebPIDecGetYUVA
+ * Add stats for lossless and alpha encoding
+ * Security related hardening: allocation and size checks
+ * Add PAM output support to dwebp
+
+- 7/19/12: version 0.1.99
+ * This is a pre-release of 0.2.0, not an rc to allow for further
+ incompatible changes based on user feedback.
+ * Alpha channel encode/decode support.
+ * Lossless encoder/decoder.
+ * Add TIFF input support to cwebp.
+ Incompatible changes:
+ * The encode ABI has been modified to support alpha encoding.
+ * Deprecated function WebPINew() has been removed.
+ * Decode function signatures have changed to consistently use size_t over
+ int/uint32_t.
+ * decode_vp8.h is no longer installed system-wide.
+ * cwebp will encode the alpha channel if present.
+
+- 9/19/11: version 0.1.3
+ * Advanced decoding APIs.
+ * On-the-fly cropping and rescaling of images.
+ * SSE2 instructions for decoding performance optimizations on x86 based
+ platforms.
+ * Support Multi-threaded decoding.
+ * 40% improvement in Decoding performance.
+ * Add support for RGB565, RGBA4444 & ARGB image colorspace.
+ * Better handling of large picture encoding.
+
+- 3/25/11: version 0.1.2
+ * Incremental decoding: picture can be decoded byte-by-byte if needs be.
+ * lot of bug-fixes, consolidation and stabilization
+
+- 2/23/11: initial release of version 0.1, with the new encoder
+- 9/30/10: initial release version with only the lightweight decoder