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PNG image datatype V45.26

   Author:       oliver at futaura.co.uk (Oliver Roberts)
   Uploader:     oliver futaura co uk (Oliver Roberts)
   Type:         util/dtype
   Version:      45.26
   Requires:     OS 3.0+,picture.datatype v43
   Architecture: m68k-amigaos; ppc-amigaos; ppc-morphos; ppc-warpup
   Date:         2022-10-08
   Readme:       http://aminet.net/util/dtype/WarpPNGdt.readme
   Downloads:    8628

http://aminet.net/util/dtype/WarpPNGdt.lha

Changes since previous Aminet 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 1.6.38 and zlib 1.2.12

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.

Contents of util/dtype/WarpPNGdt.lha

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                25671   41652  61.6% -lh5- 8146 Oct  8 11:07 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.020
[unknown]                  125     140  89.3% -lh5- 7bce Oct  8 11:11 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.030.pch
[unknown]                 3580    4868  73.5% -lh5- 1cc1 Oct  8 11:11 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.040.pch
[unknown]                 6226    8564  72.7% -lh5- 2ece Oct  8 11:11 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.060.pch
[unknown]                16456   31652  52.0% -lh5- 9fff Oct  8 11:11 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.mos.pch
[unknown]                37258   70324  53.0% -lh5- ef28 Oct  8 10:51 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.os4
[unknown]                34837   65092  53.5% -lh5- 94b1 Oct  8 10:47 WarpPNGdt/Classes/Datatypes/WarpPNG.datatype.wos
[unknown]                  120     132  90.9% -lh5- 7b9b Oct  8 11:11 WarpPNGdt/Devs/Datatypes/PNG
[unknown]                 1767    2519  70.1% -lh5- 1f25 Jan  3  2000 WarpPNGdt/Devs/Datatypes/PNG.info
[unknown]                 5925   18313  32.4% -lh5- a870 Oct  8 11:11 WarpPNGdt/Install_WarpPNG
[unknown]                 1540    2025  76.0% -lh5- 001b Jan  3  2000 WarpPNGdt/Install_WarpPNG.info
[unknown]                 9285   14636  63.4% -lh5- e89d May 16  1996 WarpPNGdt/spatch
[unknown]                14813   42214  35.1% -lh5- cfbf Oct  8 11:09 WarpPNGdt/WarpPNG.guide
[unknown]                 2308    2924  78.9% -lh5- 9746 Dec 15  1999 WarpPNGdt/WarpPNG.guide.info
[unknown]                 2406    3144  76.5% -lh5- 330f Mar  7  2001 WarpPNGdt.info
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total        15 files  162317  308199  52.7%            Oct  9 02:00