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util/dtype/WarpJPEGdt.lha

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Short:JFIF-JPEG datatype V45.17
Author:oliver at futaura.co.uk (Oliver Roberts)
Uploader:oliver futaura co uk (Oliver Roberts)
Type:util/dtype
Version:45.17
Requires:OS 3.0+,picture.datatype v43+
Architecture:m68k-amigaos; ppc-amigaos; ppc-warpup; ppc-morphos
Date:2022-10-08
Download:http://aminet.net/util/dtype/WarpJPEGdt.lha - View contents
Readme:http://aminet.net/util/dtype/WarpJPEGdt.readme
Downloads:7472

Changes since previous Aminet release:

 - Merged in changes from IJG jpeglib v9e.
 - Disabled asynchronous i/o when loading images via OS4 vector-port
   filesystems, removing overhead to improve performance (still enabled
   for older filesystems such as FFS2 and SFS).
 - OS4 version recompiled with GCC 11.2.0.
 - MorphOS and WarpOS versions recompiled with VBCC 0.9h.
 - Tweaked version string so that CPU information can be viewed with
   the version command.


FEATURES

 - Supports regular JFIF files, and also many JPEG variant formats such
   as Exif, Adobe, Photoshop, Mavi, Windows, JCCK/CMYK colorspace files
   and other less common formats

 - Supports both normal and progressive JPEG files

 - SmartScale lossless capable JPEG decoder

 - Can optionally downscale large images to fit the screen, during the
   JPEG decoding process, allowing huge oversized images to be loaded
   and displayed much faster.

 - Full true colour (24-bit) and high quality reduced colour (256 colours
   or less) and greyscale output modes, for graphics cards and native Amiga
   displays respectively

 - Highly optimized datatype dispatch engine, and fast JPEG decoder,
   resulting in a very efficient, compact and quick JPEG datatype

 - Asynchronous file i/o and double buffering techniques (WarpOS only),
   which speeds up image decoding
 
 - Optimized versions for 68020, 030, 040 and 060

 - PowerPC support with native OS4, WarpOS and MorphOS versions

 - AltiVec speed optimizations for OS4 and MorphOS

 - Alter the pen allocation precision when images are remapped to an
   8-bit display

 - Specific support for the AmigaOS picture.datatype v44+, when available

 - The dithering feature of the AmigaOS picture.datatype v44+ can be
   configured to your liking (e.g. disabled for 15/16-bit displays)

 - Based on the Independent JPEG Group's jpeglib 9e/6b and libjpeg-turbo


REQUIREMENTS

WarpJPEG is a JFIF/JPEG datatype which utilizes and requires the following:

 68k version

 - Kickstart 3.0 or higher
 - 68020 processor or higher (optimized versions included)
 - picture.datatype v43 or higher
   (supplied with AmigaOS 3.1.4, 3.2, 3.5, 3.9, CyberGraphX, P96 or AfA OS)

 WarpOS version

 - Kickstart 3.0 or higher
 - PPC accelerator card + 68040/060
 - WarpUp Release 5.0 or higher
 - picture.datatype v43 or higher
   (supplied with AmigaOS 3.1.4, 3.2, 3.5, 3.9, CyberGraphX, P96 or AfA OS)

 OS4 version

 - PPC accelerator card / AmigaOne / SAM
 - AmigaOS 4.0 or higher

 MorphOS version

 - PPC accelerator card / Pegasos / Efika
 - MorphOS 1.4 or higher

Note that a graphics card is not necessary.


Contents of util/dtype/WarpJPEGdt.lha
PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                51175   94448  54.2% -lh5- 79bc Oct  8 10:49 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.020
[unknown]                 1999    2500  80.0% -lh5- 75fe Oct  8 11:15 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.030.pch
[unknown]                15762   28192  55.9% -lh5- 4ac0 Oct  8 11:15 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.040.pch
[unknown]                14977   26956  55.6% -lh5- 5a02 Oct  8 11:15 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.060.pch
[unknown]                70180  144964  48.4% -lh5- b1a0 Oct  8 10:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.mos
[unknown]                78709  140348  56.1% -lh5- 606a Oct  8 10:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.os4
[unknown]                60683  121824  49.8% -lh5- b9e7 Oct  8 10:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.wos
[unknown]                  513     604  84.9% -lh5- dbaf Oct  8 11:14 WarpJPEGdt/Devs/Datatypes/JPEG.68k
[unknown]                 1766    2519  70.1% -lh5- 4c32 Dec 15  1999 WarpJPEGdt/Devs/Datatypes/JPEG.info
[unknown]                 1088    4780  22.8% -lh5- 831e Oct  8 10:48 WarpJPEGdt/Devs/Datatypes/JPEG.os4
[unknown]                 6416   20401  31.4% -lh5- 8081 Oct  8 11:10 WarpJPEGdt/Install_WarpJPEG
[unknown]                 1542    2026  76.1% -lh5- c5d6 Sep  2  2000 WarpJPEGdt/Install_WarpJPEG.info
[unknown]                 9285   14636  63.4% -lh5- e89d May 16  1996 WarpJPEGdt/spatch
[unknown]                16223   45117  36.0% -lh5- 9a23 Oct  8 11:27 WarpJPEGdt/WarpJPEG.guide
[unknown]                 2308    2924  78.9% -lh5- 9746 Dec 15  1999 WarpJPEGdt/WarpJPEG.guide.info
[unknown]                 2408    3144  76.6% -lh5- b40e Mar  7  2001 WarpJPEGdt.info
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        16 files  335034  655383  51.1%            Oct  9 01:59

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