HDAKFD

> There’s none yet but I would be surprised if dear imgui ever took 50% of CPU on a several-years old Intel card. Assuming the measurement are right, you may...

> Does it happens with unmodified example apps? Yes it does, these screenshots are from ImGui Examples without any modifications except for that SDL_RenderFillRect for testing, though does not make...

Okay so the issue seems to be Fonts, so we have fonts textures created by the main viewport window and apparently we cannot share textures between renderers, so we have...

I did fix this but in very whack way, i can do pull request if you don't mind whacky solutions. I did not edit anything but sdlrenderer3.cpp and sdlrenderer3.h ![Screenshot...

> Wait, the sdlrenderer backend does NOT support multi-viewports so that’s certainly not an unmodified codebase. It does not because SDLRenderer doesn’t support texture sharing. > > It seems you...

> have to think if it is a viable workaround, the problem is that the cost for it would largely depends on font atlas texture size, potentially too expensive to...

> > I'll see what SDL does on the backend that makes it such a hard task to have shared textures, > > Each renderer creates its own device, so...

> This is probably reliant on certain backend and os and is unlikely to work with all of them supported by SDL. It might be, also after doing some research...