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NEWS
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- 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