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-
- colorwheel.gadget
- AROS version by Georg Steger
- AmigaOS® port by Stephan Rupprecht
-
-
- COPYRIGHT AND DISCLAIMER
- The AROS colorwheel.gadget applies to the standard copyright
- rules of the Amiga® Research OS. The authors are not
- responsible for any damage caused by the use or misuse of
- this documentation and/or the program(s) it describes.
-
-
- REQUIREMENTS
- Any Amiga® (compatible) computer with AmigaOS® 3.x and
- 68020+ (the faster, the better:) cpu.
-
-
- GENERAL DESCRIPTION
- "The color wheel gadget class provides the ability to create gadgets
- enabling the user to control the hue and saturation components
- of an HSB (Hue-Saturation-Brightness) color space." (description
- was taken from the Autodocs, © Amiga Int,Inc.). It's used in
- conjunction with the gradientslider.gadget by various programs
- such as Palette and IconEdit v44.
-
-
- DESCRIPTION OF THIS SPECIAL VERSION
- The colorwheel.gadget that comes along with this archive
- was originally written by Georg Steger for the Amiga® Research
- OS (AROS). It has been ported and optimized for the AmigaOS®
- by Stephan Rupprecht. In opposite to the original gadget, this
- one supports hi- and truecolor displays, giving you a nice looking
- color gradient on high screen depths (CyberGFX compatible API re-
- quired).
-
-
- KNOWN PROBLEMS
- - This gadget requires more cpu time to draw itself than the original
- one does. So sometimes it may look like that your computer got
- deadlocked. After some secs your computer should work again. If you
- have a 68060 cpu, you should install the appropiate version of the
- gadget.
-
-
- INSTALLATION
- Simply copy colorwheel.gadget to SYS:Classes/gadgets. A special version
- for 68060 owners is also included into the archive (don't forget to
- rename this version by removing the .060 suffix).
-
-
- SPECIAL THANKS GO TO
- Matthias Bethke, Dominique Harelle, Marc Savart, Mario Cattaneo,
- Martin McKenzie, Wolfgang Krause, Matta, Jörg Deutschle,
- Alexander Niven-Jenkins
-
- for bug-report, suggestions and testing
-
-
- HISTORY
- 44.0 first public release
- 44.1 a few optimiziations. the gadget size is limited to 440x440
- pixels, now. added missing code that makes the gadget box
- around the wheel transparent (aka grey bg instead of bg
- image) <Marc Savart>.
- 44.2 now uses AllocRaster() to allocate memory for the mask, this
- will fix the drawing problem when p96 is used <reported by
- several users>.
- 44.2b (dated 06-Aug-00) changed a single byte:) blitting to an
- interleaved bitmap didn't work correctly due to a wrong minterm.
- 44.3 seems that using AllocRaster() to allocate memory for the mask
- wasn't a good idea. At least here, it always corrupts the
- memorylist. Don't know why but using AllocVec() seems to
- fix the problem. A drawback of this is that the gadget will
- use chipram even when not necessary but I don't care as long
- as it works ;) Please report if you have any problems!
- 44.3b included special version for 060 cpus (faster!). Thanks to
- Martin McKenzie for testing.
- 44.4 never updated a program that often within a single week, but
- nobody is perfect;) the colortable passed to LoadRGB32()
- wasn't terminated by a NULL, this could have lead to wrong
- colors on <=8bit screens. there was a chance that WritePixelLine8/
- WritePixelArray was invoked with a width parameter of 0, I hope
- it didn't cause any trouble <Georg Steger>.
- 44.5 improved and bugfixed dithering code. Thanks to Georg for his
- help.
- 44.6 various optimiziations, which helped to remove the size limit of
- the gadget. they also fix the inprecise working knob of the 68060
- version. added EraseRect() where it was missing <Harry Sintonen>.
-
-
- AUTHOR
-
- Please send bug reports and ideas to:
-
- Stephan Rupprecht, Apfeldweg 1
- D44359 Dortmund, Germany
-
- info@stephan-rupprecht.de
- http://stephan-rupprecht.de
-
- or
-
- Georg Steger, Hochlercher 30,
- I-39030 St. Johann/Ahrntal
-
- georg.steger@rolmail.net
-