I have a strange problem with GrafX2 on my PowerBookG4 with MorphOS 3.17.
If I try to use "Pick brush" (press key B), the application works veeeeery slow. Too slow for cut a brush. When I move mouse, horizontal and vertical lines move terribly slow.
If I turn on a zoom (press key M) and move mouse quickly, the application also works slow, position of the mouse is updated with very low frequency.

I would like to know if this problem occurs only on my system/device. Could someone check if is able to reproduce the problem?

i confirm that, same here, working but slow...
mmmm, not sur if SDL2 bug or app bug.

Hm, strange, since the last 2 or 3 versions of sdl I recognized the same problems with Ermentrud.
I compiled Ermentrud with new versions of SDL2 and in fullscreen mode everything is totally
slow an d eats 100% of the cpu. No matter if I use software or ogl rendering.
In window mode everything is ok.
I wanted to report this a while ago, but did not find the time yet or investigate this a little bit more.

But good news is that Ermentrud works with ogl now on mos.

@eliot, here, i think it's not smae problem
but have you try with last SDL2.0.22 (https://www.morphos-storage.net/?id=1746996) ?
(if same problem)

And warning, now SDL2 support SDL_FULLSCREEN_DESKTOP:
https://github.com/timoinutilis/inga-sdl/blob/7b73df0ef16d1bb73868108574a15171fa353a78/sources/main.c#L99

If use this flags, window take fullscreen of Ambient and not real screen.

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Thank you for the confirmation. Yes, it may be problem in SDL2.

i try to check what the key B doing....

I test Windows version... and I notice the same problem
but my PC is too fast, I go from 0.1% CPU to 1.5% when I click the b key
So I don't think this is a problem with MorphOS SDL2.... hard to say

[ Edité par beworld 12.05.2022 - 13:07 ]

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I also use GrafX2 on MacBooks with Intel i5 and ARM M1 (both are 2020). The application works fast enough on both devices. If I press B-key or enable a zoom (M-key), CPU usage doesn't change. With and without pick brush mode CPU usage is about 20% of one core.

i test with this version: http://grafx2.gitlab.io/grafX2/
MorphOS version is same (last GIT Fev 2022)
Maybe this last version have problem.

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You might have a look at MorphOS SDK's Koprofiler, at least this is a rather useful tool to profile performance of certain code sections, especially if the code is under your control.

@cyfm ok i will see how it works, thanks

so after some test:
1. if you force to use SDL_RENDERER_SOFTWARE mode (via menu), no more problem... but software is more slow..
2. i try to build grafx with SDL1, no problem...
3. so SDL2 OpenGL renderer seem the problem here... (but no more information for now)

@cyfm: very cool tool !! but read result is more complex lol

thanks beworld,
Ermentrud now works on Mos with OpenGl and less cpu usage.
I used SDL2 from your release yesterday and replaced SDL_WINDOW_FULLSCREEN_DESKTOP with SDL_WINDOW_FULLSCREEN which speeds up everything.

So it's time for a new release of Ermentrud for Mos!

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great new !

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Is it fix for GrafX2 too?

I have tried:
1. SetEnv SAVE SDL_WINDOW_FULLSCREEN,
2, reboot device,
3. check inf the flag exists in ENV and ENVARC,
4. run GrafX2 (withe the latest version of SDL2).

Unfortunately if I press B-key the speed still is very low.

GrafX use SDL_WINDOW_FULLSCREEN so it has nothing to do with your slowdown problem.

Hard to say where problem is.

I can send you SDL1 version if you want. (i test it and no problem with b key)

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It would be great if you sent me a SDL1-version of the GrafX2.
Mail: mdw ((aatt)) amiga . pl
Thank you very much.

https://www.morphos-storage.net/upload/test/grafx2_sdl1.lha

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This version works well. :) Thank you!