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util/dtype/WarpJPEGdt.lha

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Short:JFIF-JPEG datatype V45.13
Author:oliver at futaura.co.uk (Oliver Roberts)
Uploader:oliver futaura co uk (Oliver Roberts)
Type:util/dtype
Version:45.13
Requires:OS 3.0+,picture.datatype v43+
Architecture:m68k-amigaos; ppc-amigaos; ppc-warpup; ppc-morphos
Date:2016-04-20
Download:http://aminet.net/util/dtype/WarpJPEGdt.lha - View contents
Readme:http://aminet.net/util/dtype/WarpJPEGdt.readme
Downloads:5118
Changes since previous Aminet release:

 - Added downscaling feature which allows the JPEG decoder to shrink
   large images down to fit the screen or a custom size, allowing
   huge oversized images to be loaded and displayed much faster.
 - Small additional AltiVec speed improvement.
 - Merged in changes from IJG jpeglib v9b.
 - OS4 version and MorphOS AltiVec code recompiled with GCC 5.2.0.


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 9b/6b and libjpeg-turbo


REQUIREMENTS

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

 - Kickstart 3.0 or higher
 - picture.datatype v43 or higher
   (i.e. either of the ones supplied with AmigaOS 3.5+, P96 or CGraphX)

 68k version

 - 68020 processor or higher (optimized versions included)

 WarpOS version

 - PPC accelerator card + 68040/060
 - WarpUp Release 5.0 or higher

 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]                49794   92084  54.1% -lh5- 8735 Apr 20 14:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.020
[unknown]                 1891    2356  80.3% -lh5- a727 Apr 20 14:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.030.pch
[unknown]                15687   28064  55.9% -lh5- 11a2 Apr 20 14:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.040.pch
[unknown]                14874   26820  55.5% -lh5- 0d28 Apr 20 14:48 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.060.pch
[unknown]                70005  146604  47.8% -lh5- cb60 Apr 20 14:47 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.mos
[unknown]                76729  137968  55.6% -lh5- 19d7 Apr 20 14:47 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.os4
[unknown]                60319  121584  49.6% -lh5- 6f89 Apr 20 14:47 WarpJPEGdt/Classes/Datatypes/WarpJPEG.datatype.wos
[unknown]                  511     604  84.6% -lh5- ecec Apr 20 14:24 WarpJPEGdt/Devs/Datatypes/JPEG.68k
[unknown]                 1766    2519  70.1% -lh5- 4c32 Dec 15  1999 WarpJPEGdt/Devs/Datatypes/JPEG.info
[unknown]                 1242    1928  64.4% -lh5- 226f Apr 20 14:23 WarpJPEGdt/Devs/Datatypes/JPEG.os4
[unknown]                 6326   19914  31.8% -lh5- a0fb Apr 20 14:25 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]                15104   41720  36.2% -lh5- 828b Apr 20 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  329791  644895  51.1%            Apr 20 21:48

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