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 Readme for:  Datatype » Image » warppngdt.lha

WarpPNG DT

Description: PNG image datatype V45.26
Download: warppngdt.lha       (TIPS: Use the right click menu if your browser takes you back here all the time)
Size: 160kb
Version: 45.26
Date: 09 Oct 2022
Author: oliver@futaura.co.uk (Oliver Roberts)
Submitter: Samir Hawamdeh
Homepage: http://www.warpdt.co.uk/
Category: datatype/image
Replaces: datatype/image/warppngdt.lha
License: Other
Distribute: yes
Min OS Version: 4.0
FileID: 12264
 
Comments: 1
Snapshots: 0
Videos: 0
Downloads: 32  (Current version)
890  (Accumulated)
Votes: 1 (0/0)  (30 days/7 days)

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Changes since previous OS4Depot release:

 - Updated with libpng 1.6.38.
 - 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).
 - Fixed bug in instance memory allocation on OS4.
 

FEATURES

 - Supports both normal and interlaced PNG files

 - Gamma correction options allow the output image to be changed to
   suit your monitor/environment

 - Alpha channel handling can be configured to output RGBA bitmaps, or
   RGB bitmaps either by combining the alpha information internally
   using a configurable background colour or simply stripping it

 - Highly optimized datatype dispatch engine, and fast PNG decoder,
   resulting in a very efficient, compact and quick PNG 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

 - 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 libpng 1.6.37 and zlib 1.2.11


REQUIREMENTS

WarpPNG is a PNG 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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