[Cuis-dev] Desktop background, Morphic and SVG examples, and other tweaks

[Nicola Mingotti]

Hi Juan,

. For me the solid background is warmly welcomed if it improves 
performance and stability.

. I observed a few crashes on resizing Cuis window (test in my laptop, 
no VNC as my usual).
I never saw that before (it is also true I mostly work full screen so I 
am not sure my
report is really relevant).



bye
Nicola







On 9/17/21 7:32 PM, Juan Vuletich via Cuis-dev wrote:
> Hi Folks,
>
> In the recent days, I've been pushing to GitHub many updates, mostly 
> related to Morphic.
>
> I've been working hard on improving stability and reducing VM crashes, 
> especially when using VectorGraphics. This meant changing the sequence 
> in which the Display and other very big aux arrays are created. Today 
> I found that the Cuis Morphic background is likely a source of 
> trouble. On a big Display (4k), each time the main Cuis window is 
> resized, we needed to create instances of Bitmap for 56Mb, 48 of them 
> to be released immediately. And this could happen several times in 
> sequence, as the user resizes Cuis to suit their taste. I've seen VM 
> crashes during Garbage Collection while doing this. Besides, on 
> machines with limited memory (like BeagleBoard and RasPis), this could 
> give out-of-memory errors.
>
> Today I published a change set that removes the background by default 
> replacing with a solid color. After some testing, I couldn't make Cuis 
> crash, at least not doing the same things that crashed Cuis almost 
> certainly before these changes. Many of you won't care at all, but if 
> you preferred the nice background image, I hope you agree that 
> stability is more important. If you want to add the image back to your 
> image, all that is needed is to transfer the bits in the 
> 'backgroundImageData' in the World object to the new image. If you do 
> so, please tell, so we don't completely remove the support for 
> backgroundImage in the future.
>
> I also reorganized and rewrote the VectorGraphics examplles. See 
> Sample01* to Sample09* morph classes. They are meant to show the kind 
> of things Cuis can do, and how little code is needed. The code is 
> intended to changed and tweaked at will, to learn and play.
>
> I also reorganized the SVG examples in the SVG repo and package. 
> Amongst the things you can do is to evaluate the creation of a SVG 
> example with 'printIt' in a workspace, and see how you can embed any 
> morph in text.
>
> I hope you enjoy the improved stability in VectorGraphics, and the 
> updated examples.
>
> Cheers,
>