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1994-08-27
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Subject: Colour.
Date: Mon, 30 May 1994 14:06:38 +1000
From: Warwick Allison <warwick@cs.uq.oz.au>
Precedence: bulk
As I see it, the major issues with colour palette handling by GEM programs are:
- The standard 16 colours
- They're different under MultiTOS (right?)
- When should a program desire to change them?
- When should a user desire to change them?
- Sharing colours
- No point each program allocating its own Purple
- When colours must be changed, it would be nice for
the actual palette change to be minimized (eg. purple
changes to dark purple, not green)
- True Colour emulations
- Some programs use a 5x5x5 or 6x6x6 colourspace, and
these should all be the same space.
- When to change palettes
- When window is topped?
- When window is touched in any way?
- When mouse enters window?
Some time ago, I posted a draft proposal for this, but it was probably
a too-complex proposal, and so I would like to hear of any conventions
currently in use.
As a first point of discussion, what are the pros and cons of a simple
system like this:
Each application sets the palette whenever one of its windows
is topped. They use colours above 15 if available.
--
Warwick