3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
14 ### Changed / clarified
19 ## [0.10.2] - 2024-03-08
22 - bugs in (lossless) encoding (#3367, #3359 and #3386)
23 - re-enable installation of MIME file (#3375)
24 - bugs in streaming mode (#3379 and #3380)
26 ## [0.10.1] - 2024-02-28
29 - reduce allocations (#3336 and #3339),
30 fixing a significant speed regression present since 0.9.0
31 - bug in streaming encoding (#3331)
33 ## [0.10.0] - 2024-02-21
36 - decoder API: added `JxlDecoderGetBoxSizeContents` for getting the size of the
37 content of a box without the headers.
38 - encoder API: implemented new api functions for streaming encoding.
40 ### Changed / clarified
41 - decoder/encoder API: return failure when surface allocation fail
42 - encoder API / cjxl: updated modular effort levels to faster settings; the
43 effort range is now 1-10, with 11 available in advanced mode.
45 ## [0.9.2] - 2024-02-07
48 - bugs in the gdk-pixbuf plugin
51 ## [0.9.1] - 2024-01-08
54 - multiple build issues
56 ## [0.9.0] - 2023-12-22
59 - encoder API: add `JxlEncoderSetExtraChannelDistance` to adjust the quality
60 of extra channels (like alpha) separately.
61 - encoder API: new api functions for streaming encoding:
62 - `JxlEncoderSetOutputProcessor`
63 - `JxlEncoderFlushInput`
64 - `JxlEncoderOutputProcessor` struct
65 - `JxlEncoderSetOutputCallback`
66 - `JxlChunkedFrameInputSource` struct
67 - `JxlEncoderAddChunkedFrame`
68 - encoder API: new options for more fine-grained control over metadata
69 preservation when using `JxlEncoderAddJPEGFrame`:
70 - `JXL_ENC_FRAME_SETTING_JPEG_KEEP_EXIF`
71 - `JXL_ENC_FRAME_SETTING_JPEG_KEEP_XMP`
72 - `JXL_ENC_FRAME_SETTING_JPEG_KEEP_JUMBF`
73 - encoder API: new function `JxlEncoderSetUpsamplingMode` to change the upsampling
74 method, e.g. to use nearest-neighbor upsampling for pixel art
75 - decoder API: implemented `JxlDecoderSetOutputColorProfile` and
76 `JxlDecoderSetCms` to enable decoding to desired colorspace.
77 - cjxl can now be used to explicitly add/update/strip Exif/XMP/JUMBF metadata using
78 the decoder-hints syntax, e.g. `cjxl input.ppm -x exif=input.exif output.jxl`
79 - djxl can now be used to extract Exif/XMP/JUMBF metadata
80 - encoder API: new function `JxlEncoderDistanceFromQuality` for convenience to
81 calculate a `distance` given a `quality`
84 - API: the Butteraugli API (`jxl/butteraugli.h`) was removed.
85 - encoder and decoder API: all deprecated functions were removed:
86 `JxlDecoderDefaultPixelFormat`, `JxlEncoderOptionsSetLossless`,
87 `JxlEncoderOptionsSetEffort`, `JxlEncoderOptionsSetDecodingSpeed`,
88 `JxlEncoderOptionsSetDistance`, `JxlEncoderOptionsCreate`, as well as
89 the deprecated enumerator values `JXL_DEC_EXTENSIONS`, `JXL_ENC_NOT_SUPPORTED`,
90 `JXL_TYPE_BOOLEAN`, `JXL_TYPE_UINT32`, and deprecated type `JxlEncoderOptions`.
91 - decoder API: the signature of `JxlDecoderGetColorAsEncodedProfile`,
92 `JxlDecoderGetICCProfileSize`, and `JxlDecoderGetColorAsICCProfile`
93 changed: a deprecated unused argument was removed.
95 ### Changed / clarified
96 - changed the name of the cjxl flag `photon_noise` to `photon_noise_iso`
97 - fixed how large boxes are decoded (#2958)
98 - fixed encoding files with unreadable patches (#3042, #3046)
100 ## [0.8.2] - 2023-06-14
103 - Security: Fix an integer underflow bug in patch decoding (#2551- CVE-2023-35790).
105 ## [0.8.1] - 2023-02-03
108 - Allow fast-lossless for 16-bit float input (#2093)
109 - Fix bug in palette (#2120)
110 - Security: Fix OOB read in exif.h (#2101 - [CVE-2023-0645](https://www.cve.org/cverecord?id=CVE-2023-0645))
112 ## [0.8.0] - 2023-01-18
115 - decoder API: new function `JxlDecoderSetImageBitDepth` to set the bit depth
116 of the output buffer.
117 - decoder API proposal: add `JxlDecoderSetOutputColorProfile` and
118 `JxlDecoderSetCms` to enable decoding to desired colorspace; NB: not
120 - encoder API: new function `JxlEncoderSetFrameBitDepth` to set the bit depth
122 - encoder API: add an effort 10 option for lossless compression; using this
123 setting requires calling `JxlEncoderAllowExpertOptions`.
124 - encoder API: new `JXL_ENC_FRAME_SETTING_JPEG_COMPRESS_BOXES` enum value to
125 allow explicit control of metadata compression
128 - common API: removed `JxlIntrinsicSizeHeader`
129 - decoder API: removed deprecated `JXL_DEC_NEED_DC_OUT_BUFFER` and
130 `JXL_DEC_DC_IMAGE` events, `JxlDecoderDCOutBufferSize` and
131 `JxlDecoderSetDCOutBuffer` functions
133 ### Changed / clarified
134 - encoder API: `JxlEncoderProcessOutput` requires at least 32 bytes of output
135 space to proceed and guarantees that at least one byte will be written
137 ## [0.7] - 2022-07-21
140 - Export version information in headers.
141 - decoder API: Ability to decode the content of metadata boxes:
142 `JXL_DEC_BOX`, `JXL_DEC_BOX_NEED_MORE_OUTPUT`, `JxlDecoderSetBoxBuffer`,
143 `JxlDecoderGetBoxType`, `JxlDecoderGetBoxSizeRaw` and
144 `JxlDecoderSetDecompressBoxes`.
145 - decoder API: ability to mark the input is finished: `JxlDecoderCloseInput`.
146 - decoder API: ability to request updates on different progressive events using
147 `JxlDecoderSetProgressiveDetail`; currently supported events are
148 `kDC`, `kLastPasses` and `kPasses`.
149 - decoder API: ability to specify desired intensity target using
150 `JxlDecoderSetDesiredIntensityTarget`
151 - decoder API: new function `JxlDecoderSetCoalesced` to allow decoding
152 non-coalesced (unblended) frames, e.g. layers of a composite still image
153 or the cropped frames of a recompressed GIF/APNG.
154 - decoder API: new function `JxlDecoderSetUnpremultiplyAlpha` to set
155 preference for getting an associated alpha channel with premultiplied or
156 unpremultiplied colors.
157 - decoder API: field added to `JxlFrameHeader`: a `JxlLayerInfo` struct
158 that contains crop dimensions and offsets and blending information for
159 the non-coalesced case.
160 - decoder API: new function `JxlDecoderGetExtraChannelBlendInfo` to get
161 the blending information for extra channels in the non-coalesced case.
162 - decoder API: new function `JxlDecoderSetMultithreadedImageOutCallback`,
163 allowing output callbacks to receive more information about the number of
164 threads on which they are running.
165 - decoder API: new function `JxlDecoderSkipCurrentFrame` to skip processing
166 the current frame after a progressive detail is reached.
167 - decoder API: new function `JxlDecoderGetIntendedDownsamplingRatio` to get
168 the intended downsampling ratio of progressive steps, based on the
169 information in the frame header.
170 - decoder API: new function `JxlDecoderSetRenderSpotcolors` to allow disabling
171 rendering of spot colors.
172 - decoder/encoder API: add two fields to `JXLBasicInfo`: `intrinsic_xsize`
173 and `intrinsic_ysize` to signal the intrinsic size.
174 - encoder API: ability to add metadata boxes, added new functions
175 `JxlEncoderAddBox`, `JxlEncoderUseBoxes`, `JxlEncoderCloseBoxes` and
176 `JxlEncoderCloseFrames`.
177 - encoder API: added ability to set several encoder options / extra fields to
178 frames using `JxlEncoderSetFrameName`, `JxlEncoderFrameSettingsSetOption`,
179 `JxlEncoderFrameSettingsSetFloatOption`.
180 - encoder API: added ability to check required codestream compatibility level
181 and force specified using `JxlEncoderGetRequiredCodestreamLevel` and
182 `JxlEncoderSetCodestreamLevel`.
183 - encoder API: added ability to force emitting box-based container format
184 using `JxlEncoderUseContainer`.
185 - encoder API: added ability to store JPEG metadata for lossless reconstruction
186 using `JxlEncoderStoreJPEGMetadata`
187 - encoder API: new functions `JxlEncoderSetFrameHeader` and
188 `JxlEncoderSetExtraChannelBlendInfo` to set animation
189 and blending parameters of the frame, and `JxlEncoderInitFrameHeader` and
190 `JxlEncoderInitBlendInfo` to initialize the structs to set.
191 - encoder API: ability to encode arbitrary extra channels:
192 `JxlEncoderInitExtraChannelInfo`, `JxlEncoderSetExtraChannelInfo`,
193 `JxlEncoderSetExtraChannelName` and `JxlEncoderSetExtraChannelBuffer`.
194 - encoder API: ability to plug custom CMS implementation using
195 `JxlEncoderSetCms(JxlEncoder* enc, JxlCmsInterface cms)`
196 - encoder API: added `JxlEncoderGetError` to retrieve last encoder error.
199 - decoder API: using `JxlDecoderCloseInput` at the end of all input is required
200 when using JXL_DEC_BOX, and is now also encouraged in other cases, but not
201 required in those other cases for backwards compatibility.
202 - encoder API: `JxlEncoderCloseInput` now closes both frames and boxes input.
203 - CLI: `cjxl` and `djxl` have been reimplemented on the base of public decoder
204 and encoder API; dropped dependency on `gflags` for argument parsing.
207 - decoder API: `JXL_DEC_EXTENSIONS` event: use `JXL_DEC_BASIC_INFO`
208 - decoder / encoder API: pixel types `JXL_TYPE_BOOLEAN` and `JXL_TYPE_UINT32`:
209 consider using `JXL_TYPE_UINT8` and `JXL_TYPE_FLOAT` correspondingly.
210 - decoder API: pixel format parameter for `JxlDecoderGetColorAsEncodedProfile`
211 and `JxlDecoderGetICCProfileSize`: pass `NULL`.
212 - decoder API: `JxlDecoderDefaultPixelFormat`
213 - encoder API: `JxlEncoderOptions`: use `JxlEncoderFrameSettings` instead.
214 - encoder API: `JxlEncoderOptionsCreate`: use `JxlEncoderFrameSettingsCreate`
216 - encoder API: `JxlEncoderOptionsSetDistance`: use `JxlEncoderSetFrameDistance`
218 - encoder API: `JxlEncoderOptionsSetLossless`: use `JxlEncoderSetFrameLossless`
220 - encoder API: `JxlEncoderOptionsSetEffort`: use
221 `JxlEncoderFrameSettingsSetOption(frame_settings, JXL_ENC_FRAME_SETTING_EFFORT, effort)`
223 - encoder API: `JxlEncoderOptionsSetDecodingSpeed`: use
224 `JxlEncoderFrameSettingsSetOption(frame_settings, JXL_ENC_FRAME_SETTING_DECODING_SPEED, tier)`
226 - encoder API: deprecated `JXL_ENC_NOT_SUPPORTED`, the encoder returns
227 `JXL_ENC_ERROR` instead and there is no need to handle
228 `JXL_ENC_NOT_SUPPORTED`.
230 ## [0.6.1] - 2021-10-29
232 - Security: Fix OOB read in splines rendering (#735 -
233 [CVE-2021-22563](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22563))
234 - Security: Fix OOB copy (read/write) in out-of-order/multi-threaded decoding
235 (#708 - [CVE-2021-22564](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22564))
236 - Fix segfault in `djxl` tool with `--allow_partial_files` flag (#781).
237 - Fix border in extra channels when using upsampling (#796)
239 ## [0.6] - 2021-10-04
241 - API: New functions to decode extra channels:
242 `JxlDecoderExtraChannelBufferSize` and `JxlDecoderSetExtraChannelBuffer`.
243 - API: New function `JxlEncoderInitBasicInfo` to initialize `JxlBasicInfo`
244 (only needed when encoding). NOTE: it is now required to call this function
245 when using the encoder. Padding was added to the struct for forward
247 - API: Support for encoding oriented images.
248 - API: FLOAT16 support in the encoder API.
249 - Rewrite of the GDK pixbuf loader plugin. Added proper color management and
251 - Rewrite of GIMP plugin. Added compression parameters dialog and switched to
252 using the public C API.
253 - Debian packages for GDK pixbuf loader (`libjxl-gdk-pixbuf`) and GIMP
254 (`libjxl-gimp-plugin`) plugins.
255 - `cjxl`/`djxl` support for `stdin` and `stdout`.
258 - API: Renamed the field `alpha_associated` in `JxlExtraChannelInfo` to
259 `alpha_premultiplied`, to match the corresponding name in `JxlBasicInfo`.
260 - Improved the 2x2 downscaling method in the encoder for the optional color
261 channel resampling for low bit rates.
262 - Fixed: the combination of floating point original data, XYB color encoding,
263 and Modular mode was broken (in both encoder and decoder). It now works.
264 NOTE: this can cause the current encoder to write jxl bitstreams that do
265 not decode with the old decoder. In particular this will happen when using
266 cjxl with PFM, EXR, or floating point PSD input, and a combination of XYB
267 and modular mode is used (which caused an encoder error before), e.g.
268 using options like `-m -q 80` (lossy modular), `-d 4.5` or `--progressive_dc=1`
269 (modular DC frame), or default lossy encoding on an image where patches
270 end up being used. There is no problem when using cjxl with PNG, JPEG, GIF,
271 APNG, PPM, PGM, PGX, or integer (8-bit or 16-bit) PSD input.
272 - `libjxl` static library now bundles skcms, fixing static linking in
273 downstream projects when skcms is used.
274 - Spline rendering performance improvements.
275 - Butteraugli changes for less visual masking.
277 ## [0.5] - 2021-08-02
279 - API: New function to decode the image using a callback outputting a part of a
281 - API: 16-bit float output support.
282 - API: `JxlDecoderRewind` and `JxlDecoderSkipFrames` functions to skip more
283 efficiently to earlier animation frames.
284 - API: `JxlDecoderSetPreferredColorProfile` function to choose color profile in
285 certain circumstances.
286 - encoder: Adding `center_x` and `center_y` flags for more control of the tile
288 - New encoder speeds `lightning` (1) and `thunder` (2).
291 - Re-licensed the project under a BSD 3-Clause license. See the
292 [LICENSE](LICENSE) and [PATENTS](PATENTS) files for details.
293 - Full JPEG XL part 1 specification support: Implemented all the spec required
294 to decode files to pixels, including cases that are not used by the encoder
295 yet. Part 2 of the spec (container format) is final but not fully implemented
297 - Butteraugli metric improvements. Exact numbers are different from previous
299 - Memory reductions during decoding.
300 - Reduce the size of the jxl_dec library by removing dependencies.
301 - A few encoding speedups.
302 - Clarify the security policy.
303 - Significant encoding improvements (~5 %) and less ringing.
304 - Butteraugli metric to have some less masking.
305 - `cjxl` flag `--speed` is deprecated and replaced by the `--effort` synonym.
308 - API for returning a downsampled DC was deprecated
309 (`JxlDecoderDCOutBufferSize` and `JxlDecoderSetDCOutBuffer`) and will be
310 removed in the next release.
312 ## [0.3.7] - 2021-03-29
314 - Fix a rounding issue in 8-bit decoding.
316 ## [0.3.6] - 2021-03-25
318 - Fix a bug that could result in the generation of invalid codestreams as
319 well as failure to decode valid streams.
321 ## [0.3.5] - 2021-03-23
323 - New encode-time options for faster decoding at the cost of quality.
324 - Man pages for cjxl and djxl.
327 - Memory usage improvements.
328 - Faster decoding to 8-bit output with the C API.
329 - GIMP plugin: avoid the sRGB conversion dialog for sRGB images, do not show
330 a console window on Windows.
333 ## [0.3.4] - 2021-03-16
335 - Improved box parsing.
336 - Improved metadata handling.
337 - Performance and memory usage improvements.
339 ## [0.3.3] - 2021-03-05
341 - Performance improvements for small images.
342 - Add a (flag-protected) non-high-precision mode with better speed.
343 - Significantly speed up the PQ EOTF.
344 - Allow optional HDR tone mapping in djxl (--tone_map, --display_nits).
345 - Change the behavior of djxl -j to make it consistent with cjxl (#153).
346 - Improve image quality.
347 - Improve EXIF handling.
349 ## [0.3.2] - 2021-02-12
351 - Fix embedded ICC encoding regression
352 [#149](https://gitlab.com/wg1/jpeg-xl/-/issues/149).
354 ## [0.3.1] - 2021-02-10
356 - New experimental Butteraugli API (`jxl/butteraugli.h`).
357 - Encoder improvements to low quality settings.
358 - Bug fixes, including fuzzer-found potential security bug fixes.
359 - Fixed `-q 100` and `-d 0` not triggering lossless modes.
361 ## [0.3] - 2021-01-29
363 - Minor change to the Decoder C API to accommodate future work for other ways
365 - Future decoder C API changes will be backwards compatible.
366 - Lots of bug fixes since the previous version.
368 ## [0.2] - 2020-12-24
370 - JPEG XL bitstream format is frozen. Files encoded with 0.2 will be supported
374 - Files encoded with previous versions are not supported.
376 ## [0.1.1] - 2020-12-01
378 ## [0.1] - 2020-11-14
380 - Initial release of an encoder (`cjxl`) and decoder (`djxl`) that work
381 together as well as a benchmark tool for comparison with other codecs
383 - Note: JPEG XL format is in the final stages of standardization, minor changes
384 to the codestream format are still possible but we are not expecting any
385 changes beyond what is required by bug fixing.
386 - API: new decoder API in C, check the `examples/` directory for its example
387 usage. The C API is a work in progress and likely to change both in API and
388 ABI in future releases.