Mail Archives: djgpp/1999/10/31/19:11:35
I'm probably way off, I would be willing to bet that it is a problem w/ a
hardware cursor.
Did you change your video card as well?? This would then definitely point toward
that.
A hardware cursor is where the video card renders the cursor, rather than being
done in software. The problem you may be having is that the pixels are being
drawn, but not erased in the software.
Now, again I must say that it is fairly likely that I am way off. Maybe grx
doesn't allow a hardware cursor, maybe it has nothing to do at all with that.
Just my $.02/US, as it were.
Tim B wrote:
> In the svga graphics mode program I'm currently writing with grx23 a strange
> problem occurs when I move the mouse cursor near a line (particularly a
> vertical line). Pixels with the same color as the line start to appear
> suddenly and seemingly randomly nearby but they only seem to appear when the
> mouse is moving. Nor do they seem to appear at resolutions lower than
> 640x480. I thought maybe I had coded something incorrectly so I ran the
> example mouse program in the test directory and it was happening in that
> program too.
>
> I recently upgraded to a faster cpu (cyrix 333) so I thought maybe it was a
> quirk with grx23 (I had never noticed this problem with my 486 cpu) so I
> installed allegro and ran the ex13 program and it was happening there too.
> I should mention that this problem doesn't happen with the win98 mouse
> cursor.
>
> I really need the mouse to work correctly without creating these extra
> pixels. If anybody can help with a fix or work around or even pointing me
> in the right direction to figuring this out I'd be extremely grateful.
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