Force release of pages from the LRU virtual texture page pool if we are requesting a locked page.
This reduces case where new virtual texture producer can't map the root page.
Also only update adaptive VT indirection texture when the allocated VT root page is mapped.
#preflight 6266cb475037f70ba0ec6ffe
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 19905455 in //UE5/Release-5.0/... via CL 19910219
#ROBOMERGE-BOT: UE5 (Release-Engine-Staging -> Main) (v943-19904690)
[CL 19911479 by jeremy moore in ue5-main branch]
Fix invalidation of Adaptive Virtual Textures.
We need to gather all of the Allocated VTs in the AVT and invalidate the pagaes associated with their individual producers.
#preflight 61f9aaa64404d5fadefdd8d4
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 18816214 in //UE5/Release-5.0/... via CL 18816220 via CL 18822814
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v910-18824042)
[CL 18824368 by jeremy moore in ue5-main branch]
Fix MipLevel sample mode with Adaptive Virtual Texture.
#preflight 61f88a0bf657e25a590668d4
#ROBOMERGE-AUTHOR: jeremy.moore
#ROBOMERGE-SOURCE: CL 18803237 in //UE5/Release-5.0/... via CL 18803254 via CL 18821582
#ROBOMERGE-BOT: UE5 (Release-Engine-Test -> Main) (v908-18788545)
[CL 18821667 by jeremy moore in ue5-main branch]
Fix AdaptiveVirtualTexture not processing first allocation request each frame.
This led to the VT not allocating and was particularly obvious when there is only one request in the queue.
#rb none
[CL 16837857 by Jeremy Moore in ue5-main branch]
- Check partially allocated block for fit, don't need to start with a completely free block for allocations
- Try to use the lowest possible vAddress for new allocations, this reduces the texture area covered by allocations
- Page table is no longer required to be square power-2 texture, instead allow it to grow organically as allocated area increases
- Allocator starts with maximum-sized block and tracks allocated area, no longer needs special logic to 'grow'
- Rectangular allocated VTs now mip based on min-size rather than max-size, relaxes alignment requirements and allows better packing
#rb jeremy.moore
#jira none
[CL 15825578 by Ben Ingram in ue5-main branch]
