In article <341E7F51.4A36 at ibsm.cnrs-mrs.fr>, athel at ir2cbm.cnrs-mrs.fr wrote:
>I didn't realize when I asked the question that this
>was a vector format, in fact I still find it rather puzzling, given that
>my scanner software seems to like writing in PICT and it's not obvious
>to me that what a scnner sees is vectorial.
PICT stores pixel maps *as well as* vector information. Basically, it
stores any series of QuickDraw commands, including the drawing of lines,
ovals, polygons, and yes, CopyBits on pixel maps.
>even the PICT file must be pretty
>bloated given that expressing a bit map as vectors presumably means
>storing the instructions for drawing 10000 lines of zero length.
Nope, if you're using the CopyBits call, then it's just thaht one call,
plus a big stream of data -- a compact (though not compressed) format.
>(In
>case you're wondering, yes, that's how I draw a pixel in Quickdraw:
>MoveTo(x,y); LineTo(x,y); It's obviously inefficient, but it works).
Ack -- the standard method is to directly stuff the pixel map of an
offscreen GWorld, then copy this GWorld to the screen. But whatever works
for you...
,------------------------------------------------------------------.
| Joseph J. Strout Department of Neuroscience, UCSD |
|jstrout at ucsd.eduhttp://www-acs.ucsd.edu/~jstrout/ |
`------------------------------------------------------------------'
