So changing UI colors is accomplished by changing
the index used to draw a particular UI element? I would've
thought that the indexes were fixed and changing the color
would be done by changing the RGB triplet associated with
that index ...
Each method has it's own pros & cons, but the inability
to create bitmaps that match the UI elements is a big con imo.
--
-Richard M. Hartman
[EMAIL PROTECTED]
186,000 mi/sec: not just a good idea, it's the LAW!
Bob Ebert wrote in message <5151@palm-dev-forum>...
>
>At 8:42 AM +0100 16-03-00, Shannon wrote:
>>Did you think about specifying a color for transparency? Depending on how
>>you are doing it, that might work. That is the only OS supported way I
>>know of to dynamically substitute one color for another, although perhaps
>>drawing the bitmap with one of the new drawing modes would work.
>>
>>The other way to do it might be to attach a color table to the bitmap, and
>>change the color in question dynamically.
>
>
>There's no index that you can use to mean one of the UI colors. So that
>idea is out.
>
>Transparency may work for getting the background color right, which
>probably covers 90% of the cases that aren't covered by the automatic
>foreground/background application to 1-bpp bitmaps.
>
>If you really need to go beyond this, I think you'll have to draw into an
>off-screen bitmap, then use the winSwap WinDrawOperation repeatedly to
>munge the colors to what you want. winSwap trades the background and
>foreground colors for only pixels that were the background and foreground.
>Of course, that's still problematic, because you may end up recoloring your
>own pixels that were in the current UI color to the old color... (winSwap
>is sort of a cheap attempt to give you a color version of winInvert)
>
>What we really need is a blitter-type routine that will take a translation
>table and apply it to all pixels in a bitmap. The effect would be sort of
>like you'd get when you animate the palette, but you'd actually be changing
>the index values, so it'd be slower but permanent.
>
> --Bob
>
>
>
>
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