* Added EPixelFormatChannelFlags to indicate which pixel format supports which channel
* Fixed Alpha channel not properly tagged as such for various pixel formats (e.g. BC5 being marked as "Has Alpha Channel")
* Fixed some pixel formats without an enum-to-string (and vice versa) conversion
* Fixed and unified computation of mip number, max mip levels and pixel format for all types of textures supported by the texture viewer
#rb matt.kuhlenschmidt, rolando.caloca
#jira none
[CL 15471436 by jonathan bard in ue5-main branch]
Texture 2D array streaming is implemented through FTexture2DArrayMipAllocator_Reallocate
Volume texture streaming is implemented through FVolumeTextureMipAllocator_Reallocate.
New generic stream out implementation in FTextureStreamOut.
Fixed different issues in FTexture2DMipDataProvider_IO relatively to optional bulks and IO errors.
Added UTexture::GetSurfaceDepth() for 3d textures.
Added UTexture::GetSurfaceArraySize() for array textures (where cubemaps return 6).
Moved UTexture2D::CancelPendingTextureStreaming() and UTexture2D::LevelIndex to UTexture.
Renamed UTexture2DArray::GetNumSlices() to UTexture2DArray::GetArraySize().
Fixed missing "virtual" keyword in base class UTextureMipDataProviderFactory.
Updated the texture editor UI so that it shows Texture2DArray array sizes and Texture3D depth.
Unified the UI for cubemaps so that it shows as an array with size 6.
Reimplemented "LODGroups" command to make it coherent with latest changes.
#rb jian.ru, danny.couture, matt.peters
#fyi mihnea.balta
#jira UE-97975, UE-81395, UE-102061, UE-84427
[CL 14832616 by Uriel Doyon in ue5-main branch]
- Feature can be activated in the Experimental section of the Editor Settings
- Replace Texture2D/TextureCube resources by placeholders until their PlatformData is ready
- Add a utility class allowing to encapsulate raw field pointers without breaking compatibility
- Protect PlatformData from unsafe access through encapsulation.
- Protect texture's resource from race conditions between game and render threads through encapsulation.
- This allows to get rid of FlushRenderingCommands and long game-thread stutters when Updating a texture's resource.
- UpdateResource was never safe to call without a FlushRenderingCommands and multiple call-site are doing exactly that, this will fix those cases.
- Those were probably undetected due to their low occurence rate under normal conditions but can easily be reproed during async texture compilation on 32 cores.
- Force wait on required texture compilations for MaterialBaking, ProxyMesh, Thumbnail generation for disk usage
- Wait on all textures compilation whenever a wait for all shaders compilation is requested for safety (i.e. screenshot)
- Compile UI and heightmap textures with higher priority to reduce visual artefacts
- Increase priority of texture that have been rendered to improve time-to-usefulness of the editor under low core count
- Async compilation is disabled for -game / non-editor mode as there is currently no support for async bulk data loading from external files
- Properly cancel async tasks when UTexture is garbage collected before the compilation is finished
- Show progress when explicitly waiting on compilation
- Changing the mip settings in the texture editor (or any settings requiring the running platform data to be recomputed) will now be processed asynchronously.
DEBUGGING
- Can be forcibly enabled/disabled through command-line via -asynctexturecompilation=[off, on, paused]
- Can pause texture compilation using Editor.AsyncTextureCompilation = 2 or -asynctexturecompilation=paused
- Can manually resume a specified amount of paused compilation using Editor.AsyncTextureCompilationResume [Num]
- Can forcibly wait on all compilation using Editor.AsyncTextureCompilationFlushAll
BENCHMARKS
- 3m15s to 1m20s when loading Apollo_Terrain with no textures in DDC (AMD TR 3970X)
- 6m45s to 1m11s when loading Apollo_Terrain with no textures in DDC (-corelimit=8)
- 3m10s to 1m54s when lauching PIE on Apollo_Terrain with no textures in DDC (AMD TR 3970X)
- 7m43s to 1m36s when lauching PIE on Apollo_Terrain with no textures in DDC (-corelimit=8)
- 0m57s to 0m42s when importing Attic_NVIDIA.usd with no textures in DDC (AMD TR 3970X)
- 2m14s to 0m35s when importing Attic_NVIDIA.usd with no textures in DDC (-corelimit=4)
TESTS
- Success on all material baking tests from EngineTests with -asynctexturecompilation=paused
- Runned with -corelimit=1 all the way to unlimited
- Cooking worked
- Opening the texture editor/material editor will force the compilation to finish like expected.
- Changing a setting in the texture editor will recompile async, even allowing to close the editor and continue doing other changes.
- Unpausing the compilation will update the texture thumbnails properly.
- Started with -asynctexturecompilation=paused, and then unpaused after a map loading, and then into a PIE session to stresstest UpdateResources.
- Tested both dx11/dx12
- Vulkan fails on Fortnite even with -asynctexturecompilation=off because of Landscape weigthmap, not this CL.
- Compiled and tested FortniteGame / UE4 / ShooterGame projects
#rb Uriel.Doyon, Francis.Hurteau
[CL 13694814 by danny couture in ue5-main branch]
