On 13 Jan 2009, at 20:08, Jos Dreesen wrote:
>
> I wrote an emulator for the ETH Lilith computer, using Xlib.
> This works nicely and I now try to port it to fltk (1.3)
>
> However I am at a loss how to translate a central element, the
> bitmap display .
>
> The Xlib code is :
>
> /* ---- Create Lilith display ---- */
> /* Define the image used to display the Lilith's bitmap */
> /* The offset into the lilith memory is hardcoded */
> lil_dsp = XCreateImage(displ, DefaultVisual(displ, screen), 1,
> XYBitmap, 0, (char *) (mem+0x10008), LilDspWidth, LilDspHeight, 8,
> LilDspWidth/8 );
> lil_dsp->bitmap_bit_order = MSBFirst;
> lil_dsp->byte_order = MSBFirst;
>
>
> For FLTK i use fl_bitmap, and uncache to update the bitmapdata from
> the emulated memory.
> Problems I have : it flickers drastically, and the bitmaporder is
> wrong.
> Anby pointers on how to progress from here ? ( New to FLTK )
I'm not entirely sure, but I think this howto will maybe show you how
to proceed:
http://www.fltk.org/articles.php?L468 and http://www.fltk.org/
articles.php?L466
The flickering ought to be addressed by making the enclosing window
an Fl_Double_Window and ensuring that you only update the view during
your derived widgets ::draw() method. I.e. resist the temptation to
update the view dynamically during computation!
HTH,
--
Ian
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