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Welcome to the Home of FixPix
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What is FixPix?
FixPix is a general (portable) algorithm for displaying true-color
(24-bit, usually) image data on direct-color graphics devices
(16-bit high-color or 24/32-bit true-color).
Currently available implementations support the X Window System,
the Virtual Device Interface (VDI) under GEM (Graphic Environment
Manager), and the Windows GDI.
Contributions for other platforms would be greatly appreciated.
The main feature of the FixPix algorithm is the generic method of
adaption to the particular bit-distribution of the output device
combined with the efficient pixel rendering scheme.
A special feature of FixPix is the optional adapted dithering scheme
providing smooth image display for less than 24-bit deep output devices.
Who needs FixPix?
You may consider to use FixPix if you are interested in
- A high degree of independence from particular hardware and
driver software properties.
- More performance in true-color image display.
- Avoiding ugly color-banding artefacts when displaying
true-color images on 16-bit displays.
(See for example
monument.jpg
(111K),
glasses.jpeg
(100K),
vened005.jpg
(300K).)
Download the current version (released 16 Aug 2008)
fixpix16aug2008.tar.gz (88454 Bytes)-
fixpix.zip (107360 Bytes)
FixPix for XV 3.10a
You can immediately use FixPix with xv-3.10a from John Bradley
if you work on a 15/16/24/32-bit X display.
Just replace your original 'xvimage.c' (rename it to
'xvimage.c.orig') with the adapted
xvimage.c in the distribution and then
recompile xv. That's all!
Please tell me if you encounter any problems on your platform.
FixPix for Berkeley mpeg_play 2.3
Copy all files in the directory
'mpeg_play-2.3'
into the original distribution and recompile.
Read FIXPIX_CHANGES.
Sample code
There is documented sample code which describes the FixPix
algorithm:
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fixpix.h:
General declarations
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xfixpix.c:
Sample implementation for the X Window System
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vfixpix.c:
Sample implementation for the VDI under GEM
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winfixpix.cpp:
Sample implementation for the Windows GDI
Compare the new part
xvimage.c.new.part
of the xvimage.c code with the corresponding old part
xvimage.c.orig.part.
Sample applications
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Jpegcrop
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1stGuide
Tested environments
- Atari ST/TT/Falcon under TOS with GEM with any VDI graphics
adapter or under any emulation.
- Linux-Pentium system with Accel-X-Server, Mach64 graphics
card (2MB) with 15/16/24 screen depth used as display for
xv-3.10a running remotely on a Sun-Sparcstation.
- Same as above, but xv running locally on the Linux machine :-).
- XFree86 3.1.2 and 3.1.2G in 16 bpp on a SPEA Mirage card
(reported by Klaus period Steinberger at physik period uni-muenchen period de).
- Sun Ultra 1 creator with SOLARIS 2.5 and Openwin X-Server
(reported by M G Berberich <berberic at forwiss period uni-passau period de>).
- Wintel systems running Jpegcrop in HighColor 16 bpp display modes.
Comments, suggestions, enhancements, reports are welcome.
Any contributions are greatly appreciated.
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Contact: guido at jpegclub period org
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