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IFF-RGFX: An extended graphics file format for
Win/AOS/MOS/AROS - opt. using libz/zlib
Author: Andreas R. Kleinert
Date: V1.0 16 Nov 1997 (16.11.1997)
V1.1 26 Nov 1997 (26.11.1997)
V1.2 07 Dec 1997 (07.12.1997)
V2.0 28 Aug 2004 (28.08.2004)
V3.0 31 Jan 2006 (31.01.2006)
V3.1 01 Feb 2007 (01.02.2006)
V3.2 17 Apr 2007 (17.04.2007)
V3.3 03 Feb 2008 (03.02.2008)
V3.4 28 Mar 2009 (28.03.2009)
V3.5 07 Jan 2010 (07.01.2010)
V3.6 17 Jan 2010 (17.01.2010)
V3.7 18 Jan 2010 (18.01.2010)
V3.8 26 Apr 2010 (26.04.2010)
V3.9 15 Jul 2012 (15.07.2012)
V4.0 16 Aug 2012 (16.08.2012)
V4.1 31 Aug 2012 (31.08.2012)
Contact: Andreas Kleinert <infoar-kleinert.de>
Credits: Peter Bornhall, Marcel Offermans, Achim Stegemann
Abstract:
RGFX currently supports compressed and uncompressed:
- planar graphics ( <= 8 Bit integer)
- chunky graphics ( <= 8 Bit integer)
- 15 Bit graphics as RGB ( 3x 5 Bit integer)
- 16 Bit graphics as ARGB (1 + 3x 5 Bit integer)
- 24 Bit graphics as RGB triples ( 3x 8 Bit integer)
- 32 Bit graphics as ARGB quadruples (8 + 3x 8 Bit integer)
- 48 Bit graphics as RGB triples ( 3x 16 Bit integer)
- 64 Bit graphics as ARGB quadruples (16 + 3x 16 Bit integer)
- 96 Bit graphics as RGB triples ( 3x 32 Bit float )
- 128 Bit graphics as ARGB quadruples (32 + 3x 32 Bit float )
With optional PNG-style alpha channel for each 24/48/96 bit pixel
or a single transparent color for colormapped images (upto 8 bit).
HDR compliance via 32 bit IEEE float support.
(* integer formats using full range (0 .. max),
float formats normalized (0.0f .. 1.0f)
Typical structure of a RGFX file (recommended):
FORM-RGFX
RGHD image header
RSCM viemode information
RDIP DIPF information
RCOL color and transparency information
RFLG optional; further flags
NAME optional
AUTH optional
ANNO optional
Copy optional
EXIF optional; see IFF-META spec
IPTC optional; see IFF-META spec
XMP0 optional; see IFF-META spec
XMP1 optional; see IFF-META spec
GEOT optional; see IFF-META spec
GEOF optional; see IFF-META spec
ICCP optional; see IFF-META spec
ICCN optional; see IFF-META spec
GAMA optional; see IFF-META/ILBM64 spec
CHRM optional; see IFF-META/ILBM64 spec
SRGB optional; see IFF-META/ILBM64 spec
RBOD the graphics itself
All additional (optional) chunks should appear
somewhere between RCOL and RBOD.
Please refer to rgfx.h for the chunk specifications
and permitted standard chunks as far as not specified
elsewhere.
A few optional third party RGFX chunks are also discussed.
These are not part of the format specification and
should be considered private, proprietary extensions.
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Contents of dev/misc/IFF-RGFX.zipArchive: /home/aminet/aminet_root/doc//dev/misc/IFF-RGFX.zip
Length Method Size Cmpr Date Time CRC-32 Name
-------- ------ ------- ---- ---------- ----- -------- ----
3407 Defl:X 1276 63% 2012-09-01 08:50 f56cddce IFF-RGFX/IFF-RGFX.readme
2882 Defl:X 1190 59% 2012-08-16 22:21 d18ee158 IFF-RGFX/RGFX-Chunks.txt
3727 Defl:X 1701 54% 2012-09-01 08:50 b62a3de8 IFF-RGFX/RGFX-Remarks.txt
16310 Defl:X 4772 71% 2012-08-16 22:20 4cd11836 IFF-RGFX/rgfx.h
0 Stored 0 0% 2012-09-01 08:47 00000000 IFF-RGFX/
-------- ------- --- -------
26326 8939 66% 5 files
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