1 - 9/13/2023: version 1.3.2
2 This is a binary compatible release.
3 * security fix for lossless decoder (chromium: #1479274, CVE-2023-4863)
5 - 6/23/2023: version 1.3.1
6 This is a binary compatible release.
7 * security fixes for lossless encoder (#603, chromium: #1420107, #1455619,
9 * improve error reporting through WebPPicture error codes
10 * fix upsampling for RGB565 and RGBA4444 in NEON builds
11 * img2webp: add -sharp_yuv & -near_lossless
13 - fix compatibility with clang-cl (#607)
14 - improve Arm64 performance with cl.exe
16 * fix webp_js with emcc >= 3.1.27 (stack size change, #614)
17 * CMake fixes (#592, #610, #612)
18 * further updates to the container and lossless bitstream docs (#581, #611)
20 - 12/16/2022: version 1.3.0
21 This is a binary compatible release.
22 * add libsharpyuv, which exposes -sharp_yuv/config.use_sharp_yuv
23 functionality to other libraries; libwebp now depends on this library
24 * major updates to the container and lossless bitstream docs (#448, #546,
26 * miscellaneous warning, bug & build fixes (#576, #583, #584)
28 - 8/4/2022: version 1.2.4
29 This is a binary compatible release.
30 * restore CMake libwebpmux target name for compatibility with 1.2.2 (#575)
31 * fix lossless crunch mode encoding with WEBP_REDUCE_SIZE
32 (chromium: #1345547, #1345595, #1345772, #1345804)
34 - 6/30/2022: version 1.2.3
35 This is a binary compatible release.
36 * security fix for lossless encoder (#565, chromium:1313709)
37 * improved progress granularity in WebPReportProgress() when using lossless
38 * improved precision in Sharp YUV (-sharp_yuv) conversion
39 * many corrections to webp-lossless-bitstream-spec.txt (#551)
40 * crash/leak fixes on error/OOM and other bug fixes (#558, #563, #569, #573)
42 - 1/11/2022: version 1.2.2
43 This is a binary compatible release.
44 * webpmux: add "-set bgcolor A,R,G,B"
45 * add ARM64 NEON support for MSVC builds (#539)
46 * fix duplicate include error in Xcode when using multiple XCFrameworks in a
48 * doc updates and bug fixes (#538, #544, #548, #550)
50 - 7/20/2021: version 1.2.1
51 This is a binary compatible release.
52 * minor lossless encoder improvements and x86 color conversion speed up
53 * add ARM64 simulator support to xcframeworkbuild.sh (#510)
54 * further security related hardening in libwebp & examples
55 (issues: #497, #508, #518)
56 (chromium: #1196480, #1196773, #1196775, #1196777, #1196778, #1196850)
57 (oss-fuzz: #28658, #28978)
58 * toolchain updates and bug fixes (#498, #501, #502, #504, #505, #506, #509,
60 * use more inclusive language within the source (#507)
62 - 12/23/2020: version 1.2.0
65 encode.h: add a qmin / qmax range for quality factor (cwebp adds -qrange)
66 * lossless encoder improvements
67 * SIMD support for Wasm builds
68 * add xcframeworkbuild.sh, supports Mac Catalyst builds
69 * import fuzzers from oss-fuzz & chromium (#409)
70 * webpmux: add an '-set loop <value>' option (#494)
71 * toolchain updates and bug fixes (#449, #463, #470, #475, #477, #478, #479,
74 - 12/18/2019: version 1.1.0
77 WebPMalloc (issue #442)
80 * alpha decode fix (issue #439)
81 * toolchain updates and bug fixes
82 (chromium: #1026858, #1027136, #1027409, #1028620, #1028716, #995200)
83 (oss-fuzz: #19430, #19447)
85 - 7/4/2019: version 1.0.3
86 This is a binary compatible release.
87 * resize fixes for Nx1 sizes and the addition of non-opaque alpha values for
88 odd sizes (issues #418, #434)
89 * lossless encode/decode performance improvements
90 * lossy compression performance improvement at low quality levels with flat
92 * python swig files updated to support python 3
94 vwebp will now preserve the aspect ratio of images that exceed monitor
95 resolution by scaling the image to fit (issue #433)
97 - 1/14/2019: version 1.0.2
98 This is a binary compatible release.
99 * (Windows) unicode file support in the tools (linux and mac already had
101 * lossless encoder speedups
102 * lossy encoder speedup on ARM
103 * lossless multi-threaded security fix (chromium:917029)
105 - 11/2/2018: version 1.0.1
106 This is a binary compatible release.
107 * lossless encoder speedups
108 * big-endian fix for alpha decoding (issue #393)
109 * gif2webp fix for loop count=65535 transcode (issue #382)
110 * further security related hardening in libwebp & libwebpmux
111 (issues #383, #385, #386, #387, #388, #391)
112 (oss-fuzz #9099, #9100, #9105, #9106, #9111, #9112, #9119, #9123, #9170,
113 #9178, #9179, #9183, #9186, #9191, #9364, #9417, #9496, #10349,
114 #10423, #10634, #10700, #10838, #10922, #11021, #11088, #11152)
115 * miscellaneous bug & build fixes (issues #381, #394, #396, #397, #400)
117 - 4/2/2018: version 1.0.0
118 This is a binary compatible release.
119 * lossy encoder improvements to avoid chroma shifts in various circumstances
121 * big-endian fixes for decode, RGBA import and WebPPictureDistortion
123 gifwebp, anim_diff - default duration behavior (<= 10ms) changed to match
124 web browsers, transcoding tools (issue #379)
125 img2webp, webpmux - allow options to be passed in via a file (issue #355)
127 - 11/24/2017: version 0.6.1
128 This is a binary compatible release.
129 * lossless performance and compression improvements + a new 'cruncher' mode
131 * ARM performance improvements with clang (15-20% w/ndk r15c, issue #339)
132 * webp-js: emscripten/webassembly based javascript decoder
133 * miscellaneous bug & build fixes (issue #329, #332, #343, #353, #360, #361,
135 Tool updates / additions:
136 added webpinfo - prints file format information (issue #330)
137 gif2webp - loop behavior modified to match Chrome M63+ (crbug.com/649264);
138 '-loop_compatibility' can be used for the old behavior
140 - 1/26/2017: version 0.6.0
141 * lossless performance and compression improvements
142 * miscellaneous performance improvements (SSE2, NEON, MSA)
143 * webpmux gained a -duration option allowing for frame timing modification
144 * new img2webp utility allowing a sequence of images to be converted to
148 WebPPictureSharpARGBToYUVA
150 - libwebpmux / gif2webp:
151 WebPAnimEncoderOptions: kmax <= 0 now disables keyframes, kmax == 1
152 forces all keyframes. See mux.h and the gif2webp
155 - 12/13/2016: version 0.5.2
156 This is a binary compatible release.
157 This release covers CVE-2016-8888 and CVE-2016-9085.
158 * further security related hardening in the tools; fixes to
159 gif2webp/AnimEncoder (issues #310, #314, #316, #322), cwebp/libwebp (issue
161 * full libwebp (encoder & decoder) iOS framework; libwebpdecoder
162 WebP.framework renamed to WebPDecoder.framework (issue #307)
163 * CMake support for Android Studio (2.2)
164 * miscellaneous build related fixes (issue #306, #313)
165 * miscellaneous documentation improvements (issue #225)
166 * minor lossy encoder fixes and improvements
168 - 6/14/2016: version 0.5.1
169 This is a binary compatible release.
170 * miscellaneous bug fixes (issues #280, #289)
171 * reverted alpha plane encoding with color cache for compatibility with
172 libwebp 0.4.0->0.4.3 (issues #291, #298)
173 * lossless encoding performance improvements
174 * memory reduction in both lossless encoding and decoding
175 * force mux output to be in the extended format (VP8X) when undefined chunks
176 are present (issue #294)
177 * gradle, cmake build support
178 * workaround for compiler bug causing 64-bit decode failures on android
179 devices using clang-3.8 in the r11c NDK
180 * various WebPAnimEncoder improvements
182 - 12/17/2015: version 0.5.0
183 * miscellaneous bug & build fixes (issues #234, #258, #274, #275, #278)
184 * encoder & decoder speed-ups on x86/ARM/MIPS for lossy & lossless
185 - note! YUV->RGB conversion was sped-up, but the results will be slightly
186 different from previous releases
187 * various lossless encoder improvements
188 * gif2webp improvements, -min_size option added
189 * tools fully support input from stdin and output to stdout (issue #168)
190 * New WebPAnimEncoder API for creating animations
191 * New WebPAnimDecoder API for decoding animations
194 WebPPictureSmartARGBToYUVA() (-pre 4 in cwebp)
195 WebPConfig::exact (-exact in cwebp; -alpha_cleanup is now the default)
196 WebPConfig::near_lossless (-near_lossless in cwebp)
197 WebPFree() (free'ing webp allocated memory in other languages)
198 WebPConfigLosslessPreset()
199 WebPMemoryWriterClear()
200 - libwebpdemux: removed experimental fragment related fields and functions
201 - libwebpmux: WebPMuxSetCanvasSize()
202 * new libwebpextras library with some uncommon import functions:
203 WebPImportGray/WebPImportRGB565/WebPImportRGB4444
205 - 10/15/15: version 0.4.4
206 This is a binary compatible release.
207 * rescaling out-of-bounds read fix (issue #254)
208 * various build fixes and improvements (issues #253, #259, #262, #267, #268)
209 * container documentation update
210 * gif2webp transparency fix (issue #245)
212 - 3/3/15: version 0.4.3
213 This is a binary compatible release.
214 * Android / gcc / iOS / MSVS build fixes and improvements
215 * lossless decode fix (issue #239 -- since 0.4.0)
216 * documentation / vwebp updates for animation
217 * multi-threading fix (issue #234)
219 - 10/13/14: version 0.4.2
220 This is a binary compatible release.
221 * Android / gcc build fixes
222 * (Windows) fix reading from stdin and writing to stdout
223 * gif2webp: miscellaneous fixes
224 * fix 'alpha-leak' with lossy compression (issue #220)
225 * the lossless bitstream spec has been amended to reflect the current code
227 - 7/24/14: version 0.4.1
228 This is a binary compatible release.
229 * AArch64 (arm64) & MIPS support/optimizations
230 * NEON assembly additions:
231 - ~25% faster lossy decode / encode (-m 4)
232 - ~10% faster lossless decode
233 - ~5-10% faster lossless encode (-m 3/4)
234 * dwebp/vwebp can read from stdin
235 * cwebp/gif2webp can write to stdout
236 * cwebp can read webp files; useful if storing sources as webp lossless
238 - 12/19/13: version 0.4.0
239 * improved gif2webp tool
240 * numerous fixes, compression improvement and speed-up
241 * dither option added to decoder (dwebp -dither 50 ...)
242 * improved multi-threaded modes (-mt option)
243 * improved filtering strength determination
244 * New function: WebPMuxGetCanvasSize
245 * BMP and TIFF format output added to 'dwebp'
246 * Significant memory reduction for decoding lossy images with alpha.
247 * Intertwined decoding of RGB and alpha for a shorter
248 time-to-first-decoded-pixel.
249 * WebPIterator has a new member 'has_alpha' denoting whether the frame
250 contains transparency.
251 * Container spec amended with new 'blending method' for animation.
253 - 6/13/13: version 0.3.1
254 This is a binary compatible release.
255 * Add incremental decoding support for images containing ALPH and ICCP chunks.
256 * Python bindings via swig for the simple encode/decode interfaces similar to
259 - 3/20/13: version 0.3.0
260 This is a binary compatible release.
261 * WebPINewRGB/WebPINewYUVA accept being passed a NULL output buffer
262 and will perform auto-allocation.
263 * default filter option is now '-strong -f 60'
264 * encoding speed-up for lossy methods 3 to 6
265 * alpha encoding can be done in parallel to lossy using 'cwebp -mt ...'
266 * color profile, metadata (XMP/EXIF) and animation support finalized in the
268 * various NEON assembly additions
269 Tool updates / additions:
271 * vwebp given color profile & animation support
272 * cwebp can preserve color profile / metadata with '-metadata'
274 - 10/30/12: version 0.2.1
275 * Various security related fixes
276 * cwebp.exe: fix import errors on Windows XP
277 * enable DLL builds for mingw targets
279 - 8/3/12: version 0.2.0
280 * Add support for ARGB -> YUVA conversion for lossless decoder
281 New functions: WebPINewYUVA, WebPIDecGetYUVA
282 * Add stats for lossless and alpha encoding
283 * Security related hardening: allocation and size checks
284 * Add PAM output support to dwebp
286 - 7/19/12: version 0.1.99
287 * This is a pre-release of 0.2.0, not an rc to allow for further
288 incompatible changes based on user feedback.
289 * Alpha channel encode/decode support.
290 * Lossless encoder/decoder.
291 * Add TIFF input support to cwebp.
292 Incompatible changes:
293 * The encode ABI has been modified to support alpha encoding.
294 * Deprecated function WebPINew() has been removed.
295 * Decode function signatures have changed to consistently use size_t over
297 * decode_vp8.h is no longer installed system-wide.
298 * cwebp will encode the alpha channel if present.
300 - 9/19/11: version 0.1.3
301 * Advanced decoding APIs.
302 * On-the-fly cropping and rescaling of images.
303 * SSE2 instructions for decoding performance optimizations on x86 based
305 * Support Multi-threaded decoding.
306 * 40% improvement in Decoding performance.
307 * Add support for RGB565, RGBA4444 & ARGB image colorspace.
308 * Better handling of large picture encoding.
310 - 3/25/11: version 0.1.2
311 * Incremental decoding: picture can be decoded byte-by-byte if needs be.
312 * lot of bug-fixes, consolidation and stabilization
314 - 2/23/11: initial release of version 0.1, with the new encoder
315 - 9/30/10: initial release version with only the lightweight decoder