Hdrp/deferred shadow quality multi compile

[FrancescoC-unity]

Same as https://github.com/Unity-Technologies/ScriptableRenderPipeline/pull/6328

[FrancescoC-unity]

Reopening this as migration did not happen

[sebastienlagarde]

remove this comment :)

[sebastienlagarde]

@FrancescoC-unity . Various thing:

• can you merge master
• can you add a section in upgrade guide saying what will happen (as people could have setup shadow filtering to low or high and it wasn't affecting their rendering)
• can you update the documentation on the shadow pass that talk about using config to tweak shadow quality
• add a TODO in the shader stripper to say we must strip shadow compute (so we don't forget)
• relaunch yamato

For QA:

• Please test shadow mask, be sure they works (should be cover mostly by yamato)
• Build player and check that shadow filtering selected is the right one in player (test with different one)
• check that when you enable debug display mode thing still work
• check that when you disable material or light classification in DebugLoop of Framesettings, thing still work

[sebastienlagarde]

Note: build player time will increase but it should still faiirly manageable compare to lit.shader, and Juho is working on the stripping part.

[FrancescoC-unity]

Note, I named this generically Shadows as when the shadow caching rewrite lands I might need to add something here.

[sebastienlagarde]

you need to do this also for deferred.shader and tiledeferred.shader

[FrancescoC-unity]

Ha! Yes I always forget about those two. Will do!

[sebastienlagarde]

For QA: Please test also with deferredTile and deferred if thing work with shadow.
Please check also if the selected filtering quality work correctly in the player. thanks

[sebastienlagarde]

https://yamato.prd.cds.internal.unity3d.com/jobs/902-Graphics/tree/HDRP%252Fdeferred-shadow-quality-multi-compile/.yamato%252Fupm-ci-hdrp.yml%2523All_HDRP_fast-2020.1

[TomasKiniulis]

No issues found.�

• Made sure Forward Only Shadow Filtering still works
• In "Deferred Mode" and "Both" Lit Shader Modes checked that filtering quality low/medium/high correctly filters Directional Light, Point Light, Spot Light shadows in editor and player with "Deferred Tile" mode enabled and disabled
• Checked Shadowmask and Distanceshadowmask still works
• Checked Lighting Debug Modes
• Checked that Light Loop Debug, "Compute Light Evalution", "Compute Light Variants", "Compute Material Variants" does not cause any visual issues.