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Changes since previous OS4Depot 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 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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