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Re-enable FP16 support for bitmap textures #1478

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Re-enable FP16 support for bitmap textures #1478

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rtabbara
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  • Prior to Mitsuba 3.6, FP16 storage for bitmaps was disabled due to the observed degradation in performance (particularly on LLVM backends) relative to the single precision counterpart
  • Changes with Dr.Jit textures now using PacketOps (Add PacketOps support for textures drjit#329) means we can re-enable support for FP16 bitmap textures

@rtabbara
Re-enable FP16 support for bitmap textures
e36e9a1 
* Prior to Mitsuba 3.6, FP16 storage for bitmaps was disabled due to observed degradation in performance (particularly on LLVM backends)
* Changes with Dr.Jit textures now using PacketOps (mitsuba-renderer/drjit#329) means we can re-enable support for FP16 bitmap textures
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