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Performance fixes and cleanups found during terabyte volume rendering #386
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* Fix GL texture upload 'blocking' rendering: mmap to UVF data blocks must be resolved/copied first before giving it to GL; otherwise driver will load data and locks any other concurrent GL call * Only upload 1 block per frame in async case to increase responsivness * Add idle rendering state which is active if user stops interacting; otherwise rendering takes minLOD level to speedup interaction * Fix reporting of cache sizes and hits * Add linear filtering support
chevtche
approved these changes
Mar 31, 2017
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