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Name	Size	Permission
ChangeLog	259.94 KB	-rw-r--r--
NEWS	15.52 KB	-rw-r--r--
PATENTS	1.4 KB	-rw-r--r--
README.md	1.62 KB	-rw-r--r--

Code Editor : NEWS

- 6/30/2025 version 1.6.0
  This is a binary compatible release.
  API changes:
    - libwebp: WebPValidateDecoderConfig
  * additional x86 (AVX2, SSE2), general optimizations and compression
    improvements for lossless
  * `-mt` returns same results as single-threaded lossless (regressed in
    1.5.0, #426506716)
  * miscellaneous warning, bug & build fixes (#393104377, #397130631,
    #398288323, #398066379, #427503509)
  Tool updates:
    * cwebp can restrict the use of `-resize` with `-resize_mode` (#405437935)

- 12/19/2024 version 1.5.0
  This is a binary compatible release.
  API changes:
    - `cross_color_transform_bits` added to WebPAuxStats
  * minor lossless encoder speed and compression improvements
  * lossless encoding does not use floats anymore
  * additional Arm optimizations for lossy & lossless + general code generation
    improvements
  * improvements to WASM performance (#643)
  * improvements and corrections in webp-container-spec.txt and
    webp-lossless-bitstream-spec.txt (#646, #355607636)
  * further security related hardening and increased fuzzing coverage w/fuzztest
    (oss-fuzz: #382816119, #70112, #70102, #69873, #69825, #69508, #69208)
  * miscellaneous warning, bug & build fixes (#499, #562, #381372617,
    #381109771, #42340561, #375011696, #372109644, chromium: #334120888)
  Tool updates:
    * gif2webp: add -sharp_yuv & -near_lossless
    * img2webp: add -exact & -noexact
    * exit codes normalized; running an example program with no
      arguments will output its help and exit with an error (#42340557,
      #381372617)

- 4/12/2024: version 1.4.0
  This is a binary compatible release.
  * API changes:
    - libwebpmux: WebPAnimEncoderSetChunk, WebPAnimEncoderGetChunk,
                  WebPAnimEncoderDeleteChunk
    - libsharpyuv: SharpYuvOptionsInit, SharpYuvConvertWithOptions
    - extras: SharpYuvEstimate420Risk
  * further security related hardening in libwebp & examples
  * some minor optimizations in the lossless encoder
  * added WEBP_NODISCARD to report unused result warnings; enable with
    -DWEBP_ENABLE_NODISCARD=1
  * improvements and corrections in webp-container-spec.txt and
    webp-lossless-bitstream-spec.txt (#611)
  * miscellaneous warning, bug & build fixes (#615, #619, #632, #635)

- 9/13/2023: version 1.3.2
  This is a binary compatible release.
  * security fix for lossless decoder (chromium: #1479274, CVE-2023-4863)

- 6/23/2023: version 1.3.1
  This is a binary compatible release.
  * security fixes for lossless encoder (#603, chromium: #1420107, #1455619,
    CVE-2023-1999)
  * improve error reporting through WebPPicture error codes
  * fix upsampling for RGB565 and RGBA4444 in NEON builds
  * img2webp: add -sharp_yuv & -near_lossless
  * Windows builds:
    - fix compatibility with clang-cl (#607)
    - improve Arm64 performance with cl.exe
    - add Arm64EC support
  * fix webp_js with emcc >= 3.1.27 (stack size change, #614)
  * CMake fixes (#592, #610, #612)
  * further updates to the container and lossless bitstream docs (#581, #611)

- 12/16/2022: version 1.3.0
  This is a binary compatible release.
  * add libsharpyuv, which exposes -sharp_yuv/config.use_sharp_yuv
    functionality to other libraries; libwebp now depends on this library
  * major updates to the container and lossless bitstream docs (#448, #546,
    #551)
  * miscellaneous warning, bug & build fixes (#576, #583, #584)

- 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

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Code Editor : NEWS