nanogui: nanox double buffering
Subject:
Re: [nanogui] Re: nanox double buffering
From:
Junior ####@####.####
Date:
13 Jun 2007 00:19:56 +0100
Message-Id: <B1C2258D294.00000560ejr@inbox.com>
> let me see if I understand correctly.
>
> an _offscreen_ pixmap is created with GrNewPixmap().
>
> calling GrFillRect on that pixmap causes undesired effects _onscreen_?
>
>> I first tried this with manipulating a pixmap then do a GrCopyArea,
>> but I see it. I do double buffering and it's much less aparent but
>> it's still there. If I take away the nanox package and write directly
>> to my fb0 device, it's not there. I'm trying to understand the
>> package API internal as I pursue this. If anyone have any ideas I
>> would love to hear them.
>
> I'm still not clear on your call sequence to nano-X.
>
I create offscreen pixmap with GrNewPixmap();
I do GrFillRect()
GrText()
GrCopyArea()
in that order and I see undesired horiz lines.
I further do a a double buffer:
GrFillRect()
GrText()
GrCopyArea() to inactive buffer
GrFlip buffer()
and it did not make a difference.
If on the other hand I do:
GrText() without background color (effect writing over what there , look ugly)
GrCopyArea()
It looks very clean.
Is there any potential problem with this sequence?
Thanks
Jr.
