[Part 0] Shader variants refactor

[UjinT34]

Describe your PR, what does it fix/add?

Use glslang preprocessor for shaders.
Use #if to handle shader variants.
Adds variants to all shaders.
Adds experimental render:use_shader_blur_blend to render texture with blur and ignore alpha as a single draw call.

Is there anything you want to mention? (unchecked code, possible bugs, found problems, breaking compatibility, etc.)

render:use_shader_blur_blend doesn't work on rotated monitors atm.
Initial part of #13272 refactors.
May fail to compile shaders if GL_ARB_shading_language_include isn't supported for ES

Is it ready for merging, or does it need work?

Requires glslang deps to build.
Ready

[vaxerski]

generally lgtm

[vaxerski]

also c-f + ci fix needed, likely the deps (glslang, spirv)

[vaxerski]

well no dont move the enums inside the class just namespace Render{} it all. Bot hclass and enums.

As we move with the refactors ideally we'd move everything into Render:: and then have Render::GL::CRenderer and Render::Vk::CRenderer

[UjinT34]

well no dont move the enums inside the class just namespace Render{} it all. Bot hclass and enums.

As we move with the refactors ideally we'd move everything into Render:: and then have Render::GL::CRenderer and Render::Vk::CRenderer

Both GL and VK use the same CShaderLoader for source loading and preprocessing. Compilers are different and don't poison ns. #13488 has all the Renderer API/namespace bits. In general CHyprGLRenderer shouldn't be used directly by anything except CHyprOpenGLImpl and other GL internals. Any other stuff should use g_pHyprRenderer (UP<IHyprRenderer>) more or less as usual. It should have all the necessary public facing bits.

[vaxerski]

this is more or less just a housekeeping preference. That's why I ask the loader to be in Render:: because it's generic. You can see all my new code is in namespaces (e.g. Event::, Layout::, etc)

it just makes the code more tidy

[vaxerski]

@fufexan nix?

[vaxerski]

I think the rebase was messy, doesn't render for me anymore

[UjinT34]

Might be fixed now. I'll grab some ICC profile and test it myself later.
Should work without ICC profile as is.

[vaxerski]

no icc looks acceptable, icc broken.

[UjinT34]

Should have working CM in general with ICC stuff. Screen sharing copies the buffer as is or with incorrect CM. Haven't tested mirrors.
fp16 is WIP and broken atm.

[vaxerski]

will that be fixed with the fb refactor?