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 Readme for:  Datatype » Image » warptiffdt.lha


Description: TIFF and BigTIFF image datatype V45.9
Download: warptiffdt.lha       (TIPS: Use the right click menu if your browser takes you back here all the time)
Size: 552kb
Version: 45.10
Date: 09 May 2020
Author: oliver@futaura.co.uk (Oliver Roberts)
Submitter: uploader
Homepage: http://www.warpdt.co.uk/
Requirements: AmigaOS 4.x
Category: datatype/image
Replaces: datatype/image/warptiffdt.lha
License: Other
Distribute: yes
Min OS Version: 4.0
FileID: 11275
Comments: 0
Snapshots: 0
Videos: 0
Downloads: 70  (Current version)
335  (Accumulated)
Votes: 0 (0/0)  (30 days/7 days)

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Changes since previous Aminet release:

 - Updated with libtiff 4.1.0, zlib 1.2.11 and jpeglib 9d.
 - Fixed bug in file i/o optimizer, which could cause images with
   errors in their TIFF directory to fail to load properly.
 - Added support for 32-bit and 64-bit floating point samples.
 - Added pure 32-bit RGBA output for images accompanied by an alpha
   channel (requires a picture.datatype supporting RGBA - e.g. OS4,
   MorphOS and AfA OS).
 - Added ALPHA_MODE option to control whether the alpha channel is
   passed through to picture.datatype, discarded or combined with a
   background colour.
 - Added user control of the background colour to use when
   combining with an alpha channel.
 - Completely reworked more intelligent detection of features
   available in differing picture.datatype versions and a more
   robust detection of alpha channel support (OS 3.1.4 no longer
   misidentified as alpha aware).
 - Changed prefs loading routine due to broken dos/ReadArgs() in
   MorphOS 3.x (RDAF_NOALLOC and RDA_Buffer completely ignored!),
   which was causing the prefs to not always be read properly.
 - Minor optimizations and cleanups.
 - MorphOS and WarpOS versions recompiled with VBCC 0.9g.
 - OS4 version and MorphOS AltiVec code recompiled with GCC 8.1.0.
 - All benchmarks recomputed after the repair of my A1200, with
   SCSI2SD replacing my SCSI HDD and disabling all debug tools.
 - Updated Spanish installer.


 - Supports 5.0 and 6.0 TIFF and BigTIFF specification files, including
   those using Packbits, Thunderscan, CCITT (fax), Pixar, LogLuv (CIE and
   SGILog), LZW, Deflate (zip), JBIG and JPEG (old and new) compression
   schemes, plus uncompressed files

 - Image types supported include RGB (24-bit, 48-bit, 96-bit and 192-bit)
   with or without alpha channel, palette based / greyscale (1-bit,
   2-bit, 4-bit, 8-bit, 16-bit, 32-bit and 64-bit), CMYK (32-bit, 64-bit
   and 256-bit), YCbCr and CIELab

 - Can handle Xerox / ScanSoft Pagis XIF files (eXtended Image Format)

 - Supports image data organized as strips, tiles or separate components

 - For multi-image files, applications may choose which picture to decode

 - Scaling options for high resolution fax images

 - Highly optimized datatype dispatch engine, and fast TIFF decoder,
   resulting in a very efficient, compact and quick TIFF 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 (JPEG decompression) 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 libtiff 4.1.0, zlib 1.2.11, jpeglib 9d/6b and libjpeg-turbo


WarpTIFF is a TIFF 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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