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WarpJPEG DT | | Description: | JFIF-JPEG datatype V45.16 | | Download: | warpjpegdt.lha (TIPS: Use the right click menu if your browser takes you back here all the time) | | Size: | 331kb | | Version: | 45.16 | | Date: | 04 Jun 2022 | | Author: | oliver@futaura.co.uk (Oliver Roberts) | | Submitter: | Samir Hawamdeh | | Homepage: | http://www.warpdt.co.uk/ | | Category: | datatype/image | | Replaces: | datatype/image/warpjpegdt.lha | | License: | Other | | Distribute: | yes | | Min OS Version: | 4.0 | | FileID: | 12096 | | | | | Comments: | 0 | | Snapshots: | 0 | | Videos: | 0 | | Downloads: | 51 (Current version) | | 869 (Accumulated) | | Votes: | 1 (0/0) (30 days/7 days) | |
      Changes since previous OS4Depot release:
- Further optimized data cache utilisation on OS4 and MorphOS to allow up to 5%
faster decoding performance (10% with AltiVec).
- When the OS3.2 V47 picture.datatype is in use, decoding speed will now be
5-10% faster for both 68k and WarpOS.
- Benchmarks now performed using PicDTBench.
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 9d/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.
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