Thousands of colors
Thousands of colors
- Subject: Thousands of colors
- From: Bill Chin <email@hidden>
- Date: Mon, 4 Feb 2002 21:07:59 -0500
Hi,
When trying to draw bitmaps using Quartz in thousands of colors mode,
I'm finding my application is spending a lot of time in decode_data, an
internal Quartz function. This doesn't happen in 24 bit color mode, only
in 16 bit color mode. I've experimented with both 444 and 555 depths
when I create my CGImage, but both seem to use decode_data. Matter of
fact, even with the display mode set to thousands of colors, it seems
that drawing 888 is faster than drawing 444 or 555. I don't have the
real numbers yet (I have to clean up my testbench app, including adding
in better timers), but does someone know what the real deal is here?
Should I just go ahead and up-convert my bitmap data to 888?
Thanks.
..Bill Chin
M Dimension Technology