This implements the framework to write the high level rendering code into passes organized in direct acyclic graph. It is also unifying the uniform buffer, shader parameters, and pass parameters to same single API: structures with run time meta data. This allow high level user code be extremely seamless, user code debugging, and render graph ease of implementation and debugging.
Issue of collaborative work of Arne Schnober, Brian Karis, Daniel Wright, Marcus Wassmer and Guillaume Abadie.
Names of the graph managed resources are not final.
#rb Arne.Schnober, Brian.Karis, Daniel.Wright, Marcus.Wassmer
[CL 4492694 by Guillaume Abadie in Dev-Rendering branch]
#lockdown Nick.Penwarden
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MAJOR FEATURES & CHANGES
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Change 4073167 by Krzysztof.Narkowicz
Added subsurface profile for eye shading model.
#jira none
Change 4073422 by Krzysztof.Narkowicz
Added dual specular for subsurface profile shading model.
#jira none
Change 4075278 by Krzysztof.Narkowicz
Fixed forward reflection/refraction rendering issues, which caused ShaderModels.Material.Refraction to fail.
#jira none
Change 4084231 by Krzysztof.Narkowicz
Dual specular - replace lobe spread with two separate roughness multipliers. Default material roughness is now replaced by an average lobe roughness in order to support non dual specular features.
#jira none
Change 4092798 by Matt.Collins
Some HDR refactoring.
Previously the DisplayOutput and ColorGamut were only set in GameUserSettings.
I added a Sink that checks the HDR enable. If it's toggled we apply the correct DisplayOutput and ColorGamut for the current platform (this way we get good settings even if you toggle via the console). These settings are still exposed via the console and can be set independently if the user wants.
Change 4096954 by Chris.Bunner
Added ShaderModelID as scene texture option and renamed existing value to ShaderModelColor to better reflect the internal code.
Change 4111285 by Brian.Karis
Eye shading update.
Added Iris normal (disabled). Removed wrap. Fixed contact shadows.
Change 4155261 by Krzysztof.Narkowicz
Planar reflection prefilter - use scene viewport size instead of reflection target size in order to keep filter size constant in screen space. This makes planar reflection filter more stable in case of dynamic resolution.
#jira none
Change 4167644 by Krzysztof.Narkowicz
Global shader map is now stored in multiple DDC entries (one per shader filename) instead of keeping everything in a single one. This allows to skip recompilation of unchanged shader files.
Change 4183727 by Yuriy.ODonnell
Implemented auto-conversion from deferred to DBuffer decals in forward shading mode (when GBuffer is not available).
Added support for specular and metallic channels for DBuffer decals, based on work by Chris Bunner.
This requires DBufferC to be expanded from 2 to 4 channels, leading to slight increase in DBuffer bandwidth and memory requirements.
Appearance of DBuffer decals is affected by this change, as specular and metallic channel values previously hard-coded in DBufferDecalShared.ush.
Decals were forced to be non-metallic and have specular of 4% (0.5 numeric value). Now the authored decal material values will be used, which matches GBuffer decals.
Added support for DBuffer decals with emissive component.
Most decal types can now be automatically converted, with the exception of stain decals. Those are currently approximated as regular translucent decals.
Change 4197684 by laz.matech
Added a PostProcess Volume test to the map to test that Cinematic Depth of View can be achieved through PPVs as well. Changed the BP_DepthOfFeildPOV asset - I exposed Focus Method so that it can be disabled for the PPV test. Added a second Hair Model head to the InFocusHair test so that it tests in and out of focus hair models (changed the name of the test to FocusHair).
#jira none
Change 4225614 by Rolando.Caloca
DR - Enable depth collision particles on Vulkan mobile
Change 4235489 by Uriel.Doyon
Removed r.DefaultFeature.PointLightUnits and r.DefaultFeature.SpotLightUnits and replaced them by a single r.DefaultFeature.LightUnits which also controls the units of newly placed rect lights.
#jira UE-59525
Change 4260154 by Mark.Satterthwaite
Parallelize the creation of Metal archives and libraries when they are broken up into smaller sub-libraries, this should reduce apparent cook time by going wide across threads on the host of the cooker.
Change 4270594 by Brian.Karis
Fix for textured rect light L pointing away from plane due to approximate diffuse integration.
Change 4273361 by Daniel.Wright
Particle Cutouts with 8 verts now always use stochastic approach. Circle textures with > 234 edges in the convex hull were overflowing the uint64 calculation of the total number of combinations, causing an infinite loop.
Change 4309174 by Mark.Satterthwaite
Graph device utilization from the driver monitor stats - really helps see how well the GPU is being used.
Change 4310121 by Matt.Collins
Optmizing RemoveUniformBuffersFromSource. Brings it from ~20% to ~1.5% in my testing.
#jira none
Change 4312960 by Daniel.Wright
Fix from Stephen Hill for incorrect light grid culling near the near plane
Change 4314169 by Richard.Wallis
FShaderCache and associated public structures are now marked as deprecated. All FShaderCache code hooks removed from MetalRHI, OpenGLDrv and engine Launch/Shutdown logic.
#jira none
Change 4320760 by Arne.Schober
DR - Remove SV_Coverage from basepass interpolants when running with Masked in early Depth with ForwardShading as otherwise earlyZ will be disabled (as the PS has to run).
#jira UE-60992
Change 4334607 by Uriel.Doyon
Added custom overrides to reset ULightComponent::Intensity to default (in FLightComponentDetails).
Now settings a light Intesity to default resets the brightness to the archetype brightness.
This handles correctly cases where the intensity units differs between the two objects.
Also changed FLocalLightComponentDetails so that changing intensity units kepts the same brightness
(by recomputing the Intensity).
#jira UE-61401
Change 4336188 by Rolando.Caloca
DR - Added -ReduceThreadUsage so programs can use less threads (for SCW )
Change 4337967 by Rolando.Caloca
DR - Remove unused RHISupportsShaderCompression function
#rb none
[CL 4358751 by Rolando Caloca in Main branch]
