markt@wpi.wpi.edu (Mark Robert Tsombakos) (07/25/90)
Hello, Just a quick question (I've seen it asked before, but never saw the answer) - How does one draw an icl8? Thanks in advance, John email: markt@wpi.wpi.edu
beard@ux5.lbl.gov (Patrick C Beard) (07/26/90)
In article <14176@wpi.wpi.edu> markt@wpi.wpi.edu (Mark Robert Tsombakos) writes:
#Hello,
# Just a quick question (I've seen it asked before, but never saw the
#answer) -
#
# How does one draw an icl8?
#
# Thanks in advance,
# John
#email: markt@wpi.wpi.edu
I was just wondering that myself... Couldn't be easier. The format of
icl's is just the pixels. Therefore, an icl8 is just 32x32 8-bit pixels,
or 1024 bytes. Just create a pixmap, set rowBytes to 32, bounds to
0, 0, 32, 32, and set up baseAddr to point to the data, and call CopyBits.
This should work, though I've never done it.
--
-------------------------------------------------------------------------------
- Patrick Beard, Macintosh Programmer (beard@lbl.gov) -
- Berkeley Systems, Inc. ".......<dead air>.......Good day!" - Paul Harvey -
-------------------------------------------------------------------------------mdavis@pro-sol.cts.com (Morgan Davis) (07/26/90)
In-Reply-To: message from markt@wpi.wpi.edu
Drawing an icl8 is fairly easy. The icl8 consists of 1K of pixel data (a
pixMap). All you do to draw it is use CopyBits to copy the icl8's pixMap to
your destination pixMap using a 32 x 32 pixel rectangle. The rowbytes value
of the pixMap should be 32.
Here is a short routine that took me a while to figure out. If anyone
knows of a better way to do this, PLEASE let me know.
/*****************************************************************************
**
** PlotIcl8
**
** Like PlotIcon, this function uses the same arguments, only the the icon's
** handle belongs to a 1K icl8 resource.
**
**/
void
PlotIcl8 (register Rect *dest, register Handle theIcon)
{
register PixMapHandle pm;
register byte hAttrs;
CGrafPtr gp;
GetPort (&gp);
pm = NewPixMap();
HLock (pm);
CopyPixMap (gp->portPixMap, pm);
hAttrs = HGetState (theIcon);
HLock (theIcon);
(**pm).baseAddr = *theIcon;
HSetState (theIcon, hAttrs);
(**pm).rowBytes = 32 | 0x8000;
SetRect(&(**pm).bounds, 0, 0, 32, 32);
CopyBits(*pm, &(*gp).portPixMap, &(**pm).bounds, dest, 0, NULL);
DisposPixMap (pm);
}
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INET: mdavis@pro-sol.cts.com America Online, BIX: mdavisstevec@Apple.COM (Steve Christensen) (07/26/90)
In article <3681@crash.cts.com> mdavis@pro-sol.cts.com (Morgan Davis) writes: >... >Here is a short routine that took me a while to figure out. If anyone >knows of a better way to do this, PLEASE let me know. > >/***************************************************************************** > ** > ** PlotIcl8 > ** > ** Like PlotIcon, this function uses the same arguments, only the the icon's > ** handle belongs to a 1K icl8 resource. > ** > **/ > >void >PlotIcl8 (register Rect *dest, register Handle theIcon) >{ > register PixMapHandle pm; > register byte hAttrs; > CGrafPtr gp; > > GetPort (&gp); > pm = NewPixMap(); > HLock (pm); > CopyPixMap (gp->portPixMap, pm); > hAttrs = HGetState (theIcon); > HLock (theIcon); > (**pm).baseAddr = *theIcon; > HSetState (theIcon, hAttrs); > (**pm).rowBytes = 32 | 0x8000; > SetRect(&(**pm).bounds, 0, 0, 32, 32); > CopyBits(*pm, &(*gp).portPixMap, &(**pm).bounds, dest, 0, NULL); > DisposPixMap (pm); >} Actually the "hSetState(theIcon, hAttrs)" should be moved below the CopyBits() call since CopyBits can move memory, and if the icon is unlocked, it could end up drawing garbage... steve -- ____________________________________________________________________ Steve Christensen Internet: stevec@goofy.apple.com Apple Computer, Inc. AppleLink: STEVEC 20525 Mariani Ave, MS 81-CS CompuServe: 76174,1712 Cupertino, CA 95014 "You just contradicted me." "No I didn't." ____________________________________________________________________