| Readme: | Short: PNG image datatype V45.24
Author: oliver@futaura.co.uk (Oliver Roberts)
Uploader: oliver futaura co uk (Oliver Roberts)
Type: util/dtype
Version: 45.24
Requires: OS 3.0+,picture.datatype v43
Architecture: m68k-amigaos; ppc-amigaos; ppc-morphos; ppc-warpup
Changes since previous Aminet release:
- When the OS3.2 V47 picture.datatype is in use, decoding speed will
now be 5-10% faster for both 68k and WarpOS.
- When the OS4 V54 picture.datatype is in use, decoding speed will
now be 5-10% faster and up to 25% faster for interlaced images.
- Significantly reduced memory usage when decoding interlaced
images, if using the OS3.2 V47 or OS4 V54 picture.datatype.
- Benchmarks now performed using PicDTBench.
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:
68k version
- Kickstart 3.0 or higher
- 68020 processor or higher (optimized versions included)
- picture.datatype v43 or higher
(supplied with AmigaOS 3.1.4, 3.2, 3.5, 3.9, CyberGraphX, P96 or AfA OS)
WarpOS version
- Kickstart 3.0 or higher
- PPC accelerator card + 68040/060
- WarpUp Release 5.0 or higher
- picture.datatype v43 or higher
(supplied with AmigaOS 3.1.4, 3.2, 3.5, 3.9, CyberGraphX, P96 or AfA OS)
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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WarpPNGdt_45.24.lha