From: BlueChip <cs_bluechip_at_webtribe.net>
Date: Thu, 13 May 2004 06:44:03 +0100

At 06:12 13/05/04, you wrote:
>Brent Geery wrote:
>
>>On a related note, I noticed that the whole final WPS line is omitted,
>>if it will not fit on the screens remaining pixels rows. Would it be
>>possible (and easy) to modify this behavior so that the final line
>>will get displayed, and simply have the last pixel rows truncated?
>
>The LCD graphic functions don't handle clipping. Adding that functionality
>will slow down the graphics, and adds extra complexity to the code. We
>might consider it, but it isn't trivial.
>
>Linus

Check the Starfield routines - they all support clipping and at little
extra cost.
For example the time/speed cost of clipping in drawline() was pretty much
regained by optimising the existing code.
As for trivial, it's already written :)

The other debatable question is ...how fast does it need to be?
If speed is THAT important, maybe some assembler routines might be the
right way forward?
After all, a lot of the new graphics stuff is in assembler already.

BuleCihp

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Received on 2004-05-13