move ui loop out of hw/pvr
vk: implement multi-rendering, delay swap. Load fb before render pass
fps counter now counts frames, not renders
vk: force ignoreTexAlpha for 565 texture in case the supporting texture
has an alpha channel (RTT). Fixes Alone in the Dark cinematic scenes.
pvr: better detection of frame swapping (FB_R_SOF/FB_W_SOF)
pvr: synchronous rendering now always waits for render in progress
(speed measurement not reliable, render skipped when multi-rendering)
vk: limit swap chain size to 2
Linear tiling is faster for small, frequently updated textures
When lots of textures are updated each frame, a skipped frame will
destroy/recreate all textures, causing another skipped frame, etc. So
in-flight texture tracking is disabled, except for RTT textures
Limit swap chain to 2 images
Refactor base and oit renderers to avoid code dup
Flyinghead