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7c1a1789
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2020-11-05T16:04:55
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Merge branch 'master' into dev
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6e632af9
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2020-11-04T10:13:06
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Demote "fast" [I]DCT algorithms to legacy status
- Refer to the "slow" [I]DCT algorithms as "accurate" instead, since
they are not slow under libjpeg-turbo.
- Adjust documentation claims to reflect the fact that the "slow" and
"fast" algorithms produce about the same performance on AVX2-equipped
CPUs (because of the dual-lane nature of AVX2, it was not possible to
accelerate the "fast" algorithm beyond what was achievable with SSE2.)
Also adjust the claims to reflect the fact that the "fast" algorithm
tends to be ~5-15% faster than the "slow" algorithm on
non-AVX2-equipped CPUs, regardless of the use of the libjpeg-turbo
SIMD extensions.
- Indicate the legacy status of the "fast" and float algorithms in the
documentation and cjpeg/djpeg usage info.
- Remove obsolete paragraph in the djpeg man page that suggested that
the float algorithm could be faster than the "fast" algorithm on some
CPUs.
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59352195
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2020-10-19T21:17:46
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Merge branch 'master' into dev
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1ed312ea
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2020-10-15T17:47:31
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"ARM"="Arm", "NEON"="Neon"
Refer to:
https://www.arm.com/company/policies/trademarks/arm-trademark-list/arm-trademark
https://www.arm.com/company/policies/trademarks/arm-trademark-list/neon-trademark
NOTE: These changes are only applied to change log entries for 2.0.x and
later, since the change log is a historical record and Arm's new
trademark policy did not go into effect until late 2017.
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fe79f56b
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2020-07-28T15:09:00
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Merge branch 'master' into dev
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30282a87
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2020-07-28T13:00:39
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README.md, jquant2.c: Use gender-neutral pronouns
Closes #444
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c4675d62
|
2019-12-31T00:42:53
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Merge branch 'master' into dev
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29f718ee
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2019-12-31T00:06:11
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README.md, package specs: Various tweaks
- Don't enumerate the types of SIMD instructions that libjpeg-turbo
supports, as this can change without notice.
- Use more clear terminology when describing support for libjpeg v7/v8
features ("libjpeg" is, colloquially but not officially, the name for
the IJG's software, whereas the "libjpeg API" refers to our emulation
of said software.)
- "PhotoShop" = "Photoshop" (StudLy Caps Police)
- Adjust dynamic library versions to reflect the addition of
jpeg_read_icc_profile() and jpeg_write_icc_profile() in
libjpeg-turbo 2.0.x.
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5db6a681
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2019-08-30T12:02:50
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README.md: Document memory debugger pitfalls
(more specifically, the need to disable libjpeg-turbo's SIMD extensions
when testing with valgrind, MSan, etc.)
Addresses a concern expressed in #365
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f448279b
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2019-08-30T11:15:47
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README.md: Remove vestigial autotools references
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450306a8
|
2018-04-06T18:31:17
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READMEs: Mention that prog JPEG is now accelerated
|
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d83c9977
|
2018-03-23T00:00:58
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README.md: clarify where API docs can be found
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985ef4f9
|
2018-02-14T14:50:04
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Merge branch 'master' into dev
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700de8aa
|
2018-02-14T15:41:36
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README.md: Fix permissions
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8c40ac8a
|
2017-11-16T18:46:01
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Add TurboJPEG C example and clean up Java example
Also rename example.c --> example.txt and add a disclaimer to that file
so people will stop trying to compile it.
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0ff7da71
|
2016-11-16T15:55:12
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Advertise the new AVX2 SIMD extensions
(our story so far ...)
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ab664e35
|
2016-11-18T09:09:41
|
|
BUILDING.md/README.md: Increment libjpeg SO age
Documentation buglet. This should have been changed in
6ed4d9d11085acd04dc7f2f899848693976dc010 to reflect the addition of
libjpeg API functions in libjpeg-turbo 1.5.
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ce26e83f
|
2016-11-18T09:08:52
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README.md: Don't use trailing spaces as line break
Makes it easier to maintain this file using editors that automatically
remove trailing spaces.
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9407cf7f
|
2016-09-22T00:42:25
|
|
README.md: Fix typo
Introduced in 17de51835735e319ada5ca139a64227423946a8a
Closes #102
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e5f280c4
|
2016-03-11T11:14:28
|
|
README.md: Link to BUILDING.md
Addresses a concern expressed in #56 and #58.
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4f581231
|
2016-03-09T17:23:45
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BUILDING.md and README.md: Cosmetic tweaks
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fe11699d
|
2016-02-03T14:02:13
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|
Adjust performance claims
Document the latest benchmarks on the Nexus 5X and change the "2-4x"
overall claim to "2-6x". The peak performance on x86 platforms was
already closer to 5x, and the addition of SIMD-accelerated Huffman
encoding gave it that extra push over the cliff.
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e42032ba
|
2015-10-10T10:56:58
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README.md: create link for jcstest.c
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17de5183
|
2015-10-10T10:34:55
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Markdown versions of README, LICENSE, BUILDING
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7e3acc0e
|
2015-10-10T10:25:46
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|
Rename README, LICENSE, BUILDING text files
The IJG README file has been renamed to README.ijg, in order to avoid
confusion (many people were assuming that that was our project's README
file and weren't reading README-turbo.txt) and to lay the groundwork for
markdown versions of the libjpeg-turbo README and build instructions.
|