Message-ID: <375D4B93.D24B7CA1@connect.ab.ca>
Date: Tue, 08 Jun 1999 16:57:55 +0000
From: Tom Fjellstrom <tomcf AT connect DOT ab DOT ca>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: scare_mouse() alternatives?
References: <8D53104ECD0CD211AF4000A0C9D60AE30140E96A AT probe-2 DOT acclaim-euro DOT net> <19990607123545 DOT A25332 AT tabor DOT ta DOT jcu DOT cz>
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hello,

Allegro does let you show the cursor on a memory bitmap.
Just use the show_mouse() function. (ie:

BITMAP *buf=create_bitmap(SCREEN_W,SCREEN_H);
clear(buf);
show_mouse(buf);
blit(buf,screen,0,0,0,0,buf->w,buf->h);

:)
At least this has always worked for me.

Later.

	Tom Fjellstrom.

Jan Hubicka wrote:
> 
> On Mon, Jun 07, 1999 at 10:24:02AM +0100, Shawn Hargreaves wrote:
> > Beholder1 writes:
> > > I'm wondering, is there any way to write to the screen while having
> > > a mouse present without having to call scare_mouse() every time?
> >
> > Not unless you are using a VBE/AF driver that supports hardware cursors.
> >
> > > When i scare the mouse, draw the screen, and then unscare the mouse,
> > > I get an unattractive flicker.
> >
> > If you are doing a fully fledged screen animation, you need to make
> > the mouse pointer be a part of that system. In other words don't use
> > Allegro to draw the cursor at all, but just plot your own sprite
> > using the same double buffering or page flipping system that you
> > have in place for the rest of your graphics.
> In XaoS I am just putting new bitmaps to the screen. In the rest
> I would like to keep allegro's cursor just to make it working even
> in cases XaoS is busy by calculating.
> It can be nice, if allegro had some way to let me draw cursor to
> bitmap (w/o removing original one on screen), putting bitmap with
> the cursor to screen and then reventing back to normal mode draving
> cursor on screen. This can avoid flickering in such bitmap blits.
> I believe it is quite common situation, so maybe allegro can have
> some support for this( or does it already have one?)
> I've done this in the XaoS's direct-X driver and it seems to work nicely..
> 
> Honza
> >
> >
> >       Shawn Hargreaves.