cca@newton.physics.purdue.edu (Charles C. Allen) (05/08/90)
I occasionally need to print (not just capture to the clipboard or a file) a portion of a large 8-bit color screen (E-Machines T-19). I was considering Capture (apparently can't print directly), Exposure (seems rather complicated for some of the occasional users who would need to use it), and Snapjot (seemed like the best "fit" of the commercial packages I found). Then Screensnap 2.2 appeared on the net. It seems to do all we need, and works fine with images that are small enough. Unfortunately, there is a size beyond which it simply will not capture an image, even when it's application size is bumped up to over 3M. Now, since a full-screen image should take less than 1M (1024x768x8), I'm a little confused about why it continues to complain about insufficient memory. Any ideas? Charles Allen Internet: cca@newton.physics.purdue.edu Department of Physics HEPnet: purdnu::allen, fnal::cca Purdue University talknet: 317/494-9776 West Lafayette, IN 47907
hpoppe@ncar.ucar.edu (Herb Poppe) (05/08/90)
In article <3667@newton.physics.purdue.edu> cca@newton.physics.purdue.edu (Charles C. Allen) writes: > Then Screensnap 2.2 appeared on the net. It seems to do all we need, > and works fine with images that are small enough. Unfortunately, > there is a size beyond which it simply will not capture an image, even > when it's application size is bumped up to over 3M. Now, since a > full-screen image should take less than 1M (1024x768x8), I'm a little > confused about why it continues to complain about insufficient memory. > Any ideas? 1024x768x8 = 6,291,456 Herb Poppe NCAR hpoppe@ncar.ucar.edu 1850 Table Mesa Drive Boulder, CO 80307-3000 (303) 497-1296
hpoppe@ncar.ucar.edu (Herb Poppe) (05/08/90)
In article <7258@ncar.ucar.edu> hpoppe@ncar.ucar.edu (Herb Poppe) writes: > In article <3667@newton.physics.purdue.edu> cca@newton.physics.purdue.edu > (Charles C. Allen) writes: > > Then Screensnap 2.2 appeared on the net. It seems to do all we need, > > and works fine with images that are small enough. Unfortunately, > > there is a size beyond which it simply will not capture an image, even > > when it's application size is bumped up to over 3M. Now, since a > > full-screen image should take less than 1M (1024x768x8), I'm a little > > confused about why it continues to complain about insufficient memory. > > Any ideas? > > 1024x768x8 = 6,291,456 > Well, foolish me. I should know better than to post a knee-jerk follow-up. Bits ain't bytes! Abject apologies and all that... Harry Chesley, the NetNews reader stack needs a way to cancel a posting (if the NNTP protocol will support it). We dummies need one last opportunity to save ourselves from stupidom. Herb Poppe NCAR hpoppe@ncar.ucar.edu 1850 Table Mesa Drive Boulder, CO 80307-3000 (303) 497-1296
russotto@eng.umd.edu (Matthew T. Russotto) (05/08/90)
In article <7258@ncar.ucar.edu> hpoppe@ncar.ucar.edu (Herb Poppe) writes: >In article <3667@newton.physics.purdue.edu> cca@newton.physics.purdue.edu >(Charles C. Allen) writes: >> Then Screensnap 2.2 appeared on the net. It seems to do all we need, >> and works fine with images that are small enough. Unfortunately, >> there is a size beyond which it simply will not capture an image, even >> when it's application size is bumped up to over 3M. Now, since a >> full-screen image should take less than 1M (1024x768x8), I'm a little >> confused about why it continues to complain about insufficient memory. >> Any ideas? > >1024x768x8 = 6,291,456 BITS. Which is 6,291,456/8 = 786,432 BYTES -- Matthew T. Russotto russotto@eng.umd.edu russotto@wam.umd.edu ][, ][+, ///, ///+, //e, //c, IIGS, //c+ --- Any questions?
cca@newton.physics.purdue.edu (Charles C. Allen) (05/09/90)
>> Now, since a >> full-screen image should take less than 1M (1024x768x8).... > 1024x768x8 = 6,291,456 I was obviously a little too terse with the original numbers. A 1024x1024 pixel screen has 2^20 = 1 048 576 = pixels (a "computer" million, usually denoted by the prefix "M"). On an 8-bit color screen, each pixel takes 1 byte. Hence a "1024x1024x8" screen takes 1Mbyte of memory. Charles Allen Internet: cca@newton.physics.purdue.edu Department of Physics HEPnet: purdnu::allen, fnal::cca Purdue University talknet: 317/494-9776 West Lafayette, IN 47907