Switching between renderers

[vklachkov]

Description

Xash3D FWGS engine already has a mechanism for switching renderers via the r_refdll сvar. But now it's broken. The vulkan is not in the list, switching renderers causes glitches, and the window is not recreated.

Plan

In this PR, I want to fix the switching of renderers, as well as all related problems.

Behavior changing

The -ref option will override the r_refdll variable and after restarting the render will remain the same as the last time

Todo

Engine

• Fix r_refdll
• Recreate window if r_reddll changed
• Reinitialize renderer
• Reload all textures
• Reinit studio models
• Draw map after render changed

Refactoring

• Call R_Free_Video out of renderer

Settings gui

• Add vulkan renderer into the video modes menu
• Add vulkan rtx flag into the video modes menu
• Add note in the video modes settings
• Do not change render before "apply" clicked

Refused todos

• Fix fullscreen glitches
• Fix resolution changes

Thats draft, switch is not working properly!

[w23]

Switching between vk and any other renderer requires full window teardown and recreation with different SDL flags. I'm not entirely sure, but I suspect that this would require quite a bit of work on Xash3D engine side.

Can you check that VID_CreateWindow gets called when changing renderers?

[vklachkov]

Switching between vk and any other renderer requires full window teardown and recreation with different SDL flags. I'm not entirely sure, but I suspect that this would require quite a bit of work on Xash3D engine side.

Can you check that VID_CreateWindow gets called when changing renderers?

The advice helped! To switch correctly, we need to recreate the window. With some hacks, it worked. Well... Almost

https://youtu.be/-FhE6jTWogY

[vklachkov]

@w23 We may need your help and a lot of fixes to switch render correctly

[vklachkov]

At the moment, switching the renderer is working. But it has three problems that prevent from playing comfortably:

• Broken textures in menu, console, hud
• Broken model's textures
• Broken textures on levels, until the level change occurs

VK renderer crashes are caused by problems with textures.
It seems that the initialization order is not correct or a function was missed somewhere

[vklachkov]

Closed. After creating the texture manager, PR will be cleaned and re-opened in the parent repository