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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
   Readme:       http://aminet.net/util/dtype/WarpJPEGdt.readme
   Downloads:    7158

http://aminet.net/util/dtype/WarpJPEGdt.lha

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