Independent JPEG Group's JPEG Software

Edit Package libjpeg-turbo

Software to implement JPEG image compression and decompression. JPEG
(pronounced "jay-peg") is a standardized compression method for
full-color and grayscale images. JPEG is intended for compressing
"real-world" scenes (most of the time these are pictures that have been
scanned-in with a scanner or taken with a digital camera). Cartoons and
other nonrealistic images are not its strong suit. It should be noted
that JPEG output is not necessarily the same as its input. If this is a
factor for you, do not use it. With typical real-world scenes, JPEG can
achieve high compression rates without noticeable differences. If you
can accept pictures of lower quality, JPEG can achieve amazingly high
compression rates.

There are some library functions available for reading and writing JPEG
files. The 'cjpeg' and 'djpeg' applications use the library to make
conversions between JPEG and other popular graphic file formats
possible. The JPEG library is meant to be used within other
applications.

Cjpeg compresses the input file, or standard input if no filename is
given, and produces a JPEG/JFIF file as standard output. Currently
supported input file formats include: PPM (PBMPLUS color format), PGM
(PBMPLUS Grayscale format), BMP, GIF, Targa, and RLE (Utah Raster
Toolkit Format) (RLE is only supported if the RLE library is
available). Djpeg decompresses a JPEG file into one of the above
mentioned formats.

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Source Files
Filename Size Changed
_multibuild 0000000065 65 Bytes
baselibs.conf 0000000393 393 Bytes
libjpeg-turbo-1.3.0-tiff-ojpeg.patch 0000001970 1.92 KB
libjpeg-turbo-3.0.1.tar.gz 0002800900 2.67 MB
libjpeg-turbo-3.0.1.tar.gz.sig 0000000543 543 Bytes
libjpeg-turbo.changes 0000048907 47.8 KB
libjpeg-turbo.keyring 0000001858 1.81 KB
libjpeg-turbo.spec 0000006805 6.65 KB
Revision 149 (latest revision is 154)
Petr Gajdos's avatar Petr Gajdos (pgajdos) accepted request 1136025 from Dirk Mueller's avatar Dirk Mueller (dirkmueller) (revision 149)
- update to 3.0.1 (bsc#1211542, CVE-2023-2804):
  * The x86-64 SIMD functions now use a standard stack frame,
    prologue, and epilogue so that debuggers and profilers can
    reliably capture backtraces from within the functions.
  * Fixed two minor issues in the interblock smoothing algorithm
    that caused mathematical (but not necessarily perceptible)
    edge block errors when decompressing progressive JPEG images
    exactly two MCU blocks in width or that use vertical
    chrominance subsampling.
  * The TurboJPEG API now supports 4:4:1 (transposed 4:1:1)
    chrominance subsampling, which allows losslessly transposed or
    rotated 4:1:1 JPEG images to be losslessly cropped, partially
    decompressed, or decompressed to planar YUV images.
  * Fixed various segfaults and buffer overruns (CVE-2023-2804)
  * that occurred when attempting to decompress various
    specially-crafted malformed 12-bit-per-component and
    16-bit-per-component lossless JPEG images using color
    quantization or merged chroma upsampling/color conversion.  The
    underlying cause of these issues was that the color
    quantization and merged chroma upsampling/color conversion
    algorithms were not designed with lossless decompression
    in mind.  Since libjpeg-turbo explicitly does not support color
    conversion when compressing or decompressing lossless JPEG
    images, merged chroma upsampling/color conversion never should
    have been enabled for such images.  Color quantization is a
    legacy feature that serves little or no purpose with lossless
    JPEG images, so it is also now disabled when decompressing such
    images.  (As a result, djpeg can no longer decompress a
    lossless JPEG image into a GIF image.)
  * Fixed an oversight in 1.4 beta1[8] that caused various
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