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WarpPNGdt.readme
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2001-05-03
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Short: PNG image datatype V44.15 (68k,WarpOS,MorphOS)
Author: oliver@futaura.co.uk (Oliver Roberts)
Uploader: oliver@futaura.co.uk (Oliver Roberts)
Version: 44.15
Type: util/dtype
Requires: OS 3.0+,picture.datatype v43
Changes since previous release:
- The built-in image gamma value (used when no value is defined in the
prefs) was incorrect - fixed.
- Gamma correction did not work in the 68040 and 060 versions, causing
images to be mostly black or white if the default gamma values were
not used. This was due to a non-working FPU pow() implementation -
mathieeedoubtrans.library is now used instead. Does not affect speed.
FEATURES
- Supports both normal and interlaced PNG files
- Gamma correction options allow the output image to be changed to
suit your monitor/environment
- 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 WarpOS and native MorphOS versions
- Alter the pen allocation precision when images are remapped to an
8-bit display
- Specific support for the OS 3.5/3.9 picture.datatype, when available
- The dithering feature of the OS 3.5/3.9 picture.datatype can be
configured to your liking (e.g. disabled for 15/16-bit displays)
- Based on libpng 1.0.9 and zlib 1.1.3
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 3.5/3.9, P96 or CGraphX)
68k version
- 68020 processor or higher (optimized versions included)
WarpOS version
- PPC accelerator card + 68040/060
- WarpUp Release 4 (powerpc.library V15) or higher
MorphOS version
- PPC accelerator card
- MorphOS beta release 1 or higher
Note that a graphics card is not necessary - the P96 or OS 3.5/3.9
picture.datatype will automatically dither images down to your display
requirements.
============================= Archive contents =============================
Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
3144 2406 23.4% 07-Mar-01 16:13:06 WarpPNGdt.info
48232 25507 47.1% 10-Apr-01 18:12:18 +WarpPNG.datatype.020
144 129 10.4% 10-Apr-01 18:12:20 +WarpPNG.datatype.030.pch
8396 4959 40.9% 10-Apr-01 18:12:24 +WarpPNG.datatype.040.pch
10756 6707 37.6% 10-Apr-01 18:12:28 +WarpPNG.datatype.060.pch
87648 40011 54.3% 10-Apr-01 18:06:30 +WarpPNG.datatype.elf
75968 35388 53.4% 10-Apr-01 18:03:34 +WarpPNG.datatype.wos
130 118 9.2% 09-Jan-00 17:53:40 +PNG
2519 1767 29.8% 03-Jan-00 19:44:24 +PNG.info
7801 2694 65.4% 26-Mar-01 11:54:30 +Install_WarpPNG
2025 1540 23.9% 03-Jan-00 20:54:32 +Install_WarpPNG.info
14636 9285 36.5% 16-May-96 12:42:42 +spatch
26307 9704 63.1% 10-Apr-01 14:12:38 +WarpPNG.guide
2924 2308 21.0% 15-Dec-99 16:37:44 +WarpPNG.guide.info
-------- ------- ----- --------- --------
290630 142523 50.9% 17-Apr-101 22:26:26 14 files