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WarpJPEGdt.readme
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2001-05-03
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Short: JFIF-JPEG datatype V44.20 (68k,WarpOS,MorphOS)
Author: oliver@futaura.co.uk (Oliver Roberts)
Uploader: oliver@futaura.co.uk (Oliver Roberts)
Version: 44.20
Type: util/dtype
Requires: OS 3.0+,picture.datatype v43+
Replaces: util/dtype/WarpJPEG.dt.lha
Changes since previous release:
- Improved YCCK to RGB colour conversion routine (Adobe images using
the YCCK colour space should now look much closer to the original
image).
- Added RGB colour conversion support for Adobe images using the CMYK
colour space.
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
- Full true colour (24-bit) and high quality reduced colour (256 colours
or less) 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 WarpOS and native MorphOS versions
- Alter the pen allocation precision when images are remapped to an
8-bit display
- Specific support for the OS 3.5/3.9 picture.datatype, when available
- The dithering feature of the OS 3.5/3.9 picture.datatype can be
configured to your liking (e.g. disabled for 15/16-bit displays)
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 3.5/3.9, P96 or CGraphX)
68k version
- 68020 processor or higher (optimized versions included)
WarpOS version
- PPC accelerator card + 68040/060
- WarpUp Release 4 (powerpc.library V15) or higher
MorphOS version
- PPC accelerator card
- MorphOS beta release 1 or higher
Note that a graphics card is not necessary.
============================= Archive contents =============================
Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
3144 2408 23.4% 07-Mar-01 16:14:10 WarpJPEGdt.info
42664 26226 38.5% 12-Apr-01 11:18:00 +WarpJPEG.datatype.020
1972 1627 17.4% 12-Apr-01 11:18:02 +WarpJPEG.datatype.030.pch
6812 4921 27.7% 12-Apr-01 11:18:06 +WarpJPEG.datatype.040.pch
5176 4040 21.9% 12-Apr-01 11:18:08 +WarpJPEG.datatype.060.pch
78120 35026 55.1% 12-Apr-01 11:15:02 +WarpJPEG.datatype.elf
69520 32822 52.7% 12-Apr-01 11:13:32 +WarpJPEG.datatype.wos
516 436 15.5% 02-Aug-00 17:31:42 +JPEG
2519 1766 29.8% 15-Dec-99 14:24:28 +JPEG.info
9114 2984 67.2% 26-Mar-01 11:52:24 +Install_WarpJPEG
2026 1542 23.8% 02-Sep-00 00:37:36 +Install_WarpJPEG.info
14636 9285 36.5% 16-May-96 12:42:42 +spatch
29998 11042 63.1% 12-Apr-01 11:07:18 +WarpJPEG.guide
2924 2308 21.0% 15-Dec-99 16:37:44 +WarpJPEG.guide.info
-------- ------- ----- --------- --------
269141 136433 49.3% 17-Apr-101 21:43:50 14 files