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Aminet 45 (2001)(GTI - Schatztruhe)[!][Oct 2001].iso
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WarpPNGdt.readme
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2001-09-05
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Short: PNG image datatype V44.19 (68k,WarpOS,MorphOS)
Author: oliver@futaura.co.uk (Oliver Roberts)
Uploader: oliver@futaura.co.uk (Oliver Roberts)
Version: 44.19
Type: util/dtype
Requires: OS 3.0+,picture.datatype v43
Changes since previous release:
- Added option to allow the alpha channel to be ignored, for images
which have one.
- Now supports the PDTA_GetNumPictures and PDTA_WhichPicture tags.
- Discovered a bug in the CyberGraphX picture.datatype, concerning
error numbers which would have resulted in an unknown error being
reported by application software if bitmap allocation failed - added
workaround.
FEATURES
- Supports both normal and interlaced PNG files
- Gamma correction options allow the output image to be changed to
suit your monitor/environment
- Two different modes (combine or strip) for handling images that contain
an alpha channel
- 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 1.0.12 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
48468 25687 47.0% 20-Aug-01 12:46:06 +WarpPNG.datatype.020
144 128 11.1% 20-Aug-01 12:46:08 +WarpPNG.datatype.030.pch
8392 4951 41.0% 20-Aug-01 12:46:12 +WarpPNG.datatype.040.pch
11240 7026 37.4% 20-Aug-01 12:46:16 +WarpPNG.datatype.060.pch
84800 39325 53.6% 20-Aug-01 12:40:44 +WarpPNG.datatype.elf
73252 35163 51.9% 20-Aug-01 12:39:16 +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
9848 3344 66.0% 20-Jul-01 09:07:44 +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
27930 10219 63.4% 20-Aug-01 12:46:44 +WarpPNG.guide
2924 2308 21.0% 15-Dec-99 16:37:44 +WarpPNG.guide.info
-------- ------- ----- --------- --------
289452 143267 50.5% 25-Aug-101 06:30:34 14 files