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Full Discussion: From Processor To Display
Top Forums Programming From Processor To Display Post 302462289 by ciNG on Wednesday 13th of October 2010 08:43:23 PM
Old 10-13-2010
From Processor To Display

What is the programming side of the keyboard's PrintScreen?
When I hit this button, what is the computer doing to give me the image that my monitor is displaying?

In the same arena, how does the computer tell the monitor what to display visually? I move the mouse and the cursor appears to be moving as a result of my manipulation, but I know it is some intricate process of programmed communication. What is happening here? not so much in lay men's terms but to the grit of it.

If I wanted to write code to alter what and how the monitor is told to display, and also how the mouse and keyboard receive their information and send it to the monitor... what languages and or avenues ought I look into? Is this all machine language? assembly? higher?
 

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WMGRABIMGAE(1)						      General Commands Manual						    WMGRABIMGAE(1)

NAME
WMGRABIMGAE - Dockable WWW Image monitor. SYNOPSIS
wmGrabImage [-h] [-display <Display>] -url <Image URL> [-http <URL>] [-c] [-delay <Time>] DESCRIPTION
wmGrabImage is a WindowMaker DockApp that maintains a small thumbnail copy of your favorite image from the WWW. The image to monitor is specified via the "-url <Image URL>" command-line option and it gets updated approximately every 5 minutes. The update interval can be overridden via the "-delay <Time>" command-line option (Time is in seconds). Each of the three mouse buttons can be double clicked with the following effects; Left Mouse: Brings up the full-sized image in xv. Middle Mouse: Sends a URL (specified via the -http <URL> command-line option) to an already running netscape process or in a new netscape process if there arent any running. Right Mouse: Updates the image immediately. OPTIONS
-h Display list of command-line options. -display [display] Use an alternate X Display. -url <Image URL> The URL of the WWW image to monitor. -http <URL> The URL to send to netscape via a Middle double click. -c Center the image vertically within the icon. -delay <Time> The time between updates. The default is about 5 minutes. FILES
The original sized image and the thumbnail XPM image are both stored in ~/.wmGrabImage/ which gets created if it doesnt already exist. SEE ALSO
wget and the ImageMagick convert utility. BUGS
Who knows? -- its still Beta though. (Let me know if you find any). Oldish versions of the ImageMagick convert utility have a memory leak -- if you have that problem, upgrade to the latest version. AUTHOR
Michael G. Henderson <mghenderson@lanl.gov> 16 December 1998 WMGRABIMGAE(1)
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