neil@celia.UUCP (Neil Richmond) (04/19/91)
Can anyone tell me how the mouse deals with overscan? I am having some problems with my tablet driver and overscan. Basically, I cannot get the mouse pointer
to the edges of the screen. Should I scale the numbers so that they are outside
the system window parameters of 640 x 400? I read in the ROM kernal manuals
that GFXBase Library contains these numbers and references these whenever doing
mouse operations. It seems that the system clips the mouse to the window. A
question, in overscan, is the left side of the screen's x coordinate less than
zero? When the mouse is at " zero " in x, it is not fully to the left side of
the screen. I am using IECLASS_POINTERPOS to position the pointer with the
tablet. I guess I need to know how overscan works. Is there any documentation?
neil
--
Only 3179 shopping days left till the next millenium!
Neil F. Richmond INTERNET: celia!neil@usc.edu
Rhythm & Hues Inc. UUCP: ...{ames,hplabs}!lll-tis!celia!neil)peter@cbmvax.commodore.com (Peter Cherna) (05/01/91)
In article <994@celia.UUCP> celia!neil@usc.edu (Neil Richmond) writes: > >Can anyone tell me how the mouse deals with overscan? I am having some problems with my tablet driver and overscan. Basically, I cannot get the mouse pointer >to the edges of the screen. GfxBase->NormalDisplayRows and GfxBase->NormalDisplayColumns are the height and width of the normal "morerowed" area of a hires non-interlaced screen. Equivalently Preferences->RowSizeChange and ColumnSizeChange are the difference of these values from their nominal values. Preferences->ViewXOffset and ViewYOffset are the amounts the view has shifted (usually up and to the left, I gather they'd be negative in that case). These numbers probably represent lores non-interlaced pixels. >neil >-- >Only 3179 shopping days left till the next millenium! >Neil F. Richmond INTERNET: celia!neil@usc.edu >Rhythm & Hues Inc. UUCP: ...{ames,hplabs}!lll-tis!celia!neil) Peter -- Peter Cherna, Operating Systems Development Group, Commodore-Amiga, Inc. {uunet|rutgers}!cbmvax!peter peter@cbmvax.commodore.com My opinions do not necessarily represent the opinions of my employer. "If all you have is a hammer, everything looks like a nail."