The code led me to confusion, so I just decided to use wordaddr. It
works properly now, and my Pico is now up at /n/sources/contrib/
pietro/pico9.tgz (note the 9). Details are in README.Plan9, test
files are in /lib/face/.
On Jan 26, 2008, at 9:55 AM, Russ Cox wrote:
However, I want to be able to read 32-bit color values. How does
Memimage store colors and
You should be able to answer this by reading the programs
I pointed out as well as color(6), image(6), and memdraw(2).
If all else fails, you could try writing a simple program and
see how far you get.
will the code I use work?
Probably not at first (whose code does?), but eventually.
I can change it to 24-bit if necessary, but that would make it
slower to read files.
If I do what these programs say, how will my u32int be arranged?
The answers to these questions are *in* those programs
(not to mention the manual pages!). Given that your reply
came in four minutes after my post, it sounds like you didn't
actually read the programs I pointed out. The first one on
the list, /sys/src/cmd/crop.c, picks up a Plan 9 image file
and then walks over every 32-bit pixel looking for a given color.
And it's only 211 lines. Between that and the documentation
I'd think that would be enough to answer questions about
how colors are stored. At the least it should prompt
questions that are more specific than "how do I do this?"
Read /sys/src/cmd/crop.c, color(6), image(6), and memdraw(2).
Russ
