At 1:43 AM +0200 05/27/00, Eric Snider wrote:
>Have any of you been working on sub-pixel rendering on the Palm IIIc?
We looked at it. And decided it wasn't worth the trouble.
Sub-pixel font rendering works fairly well for relatively large point sizes
of italics text on a relatively high dot pitch (100dpi+) LCD display.
You'll notice all the demos emphasize this. :-)
Palm devices use relatively small point sizes of text, don't use italics at
all, and have a lower dot pitch display. So it's not exactly appropriate
technology.
Sub-pixel rendering also increases the complexity of drawing text and
requires larger font data. This means more CPU cycles and larger ROMs,
which untimately means shorter battery life and slower devices. Text
drawing is already one of the slowest blitting operations on the Palm
devices...
And, finally, the visual effect isn't actually very good on a IIIc! Take a
sub-pixel rendered image off one of the websites and load it into an image
viewer and you'll see what I mean. The relatively large pixel size of the
IIIc display means you can actually see the color banding, which is not
attractive.
--Bob
________________________________________________________________________
Bob Ebert, Consulting Engineer, Palm Computing Europe V: +33 4 9952.4354
77 rue Samuel Morse, 34935 Montpellier Cedex 9 France F: +33 4 9952.4397
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