rename cubic to cubicbspline;
tweak filter type documentation
add stb_image_resize.h to readme
convert tabs to spaces so it's consistent with other stb libs
tweak grammar
compile as C
unroll channel loops in downsampler
explicit performance tests variants
cache filter-width derived computations that use floor/ceil because those were showing up like crazy on VC6 profile despite only being per-scanline-ish?!?
unroll inner loop in horizontal_resample
unroll vertical_upsample inner loop, and reverse loop nesting to minimize work
move x loop inside switch in horizontal_downsample
because of we divide by /255 not /256, we lose numerical precision, so can't guarantee that box filter results round to same results as naive
replace int(floor()) with int(), since that produces same results for non-negative values and is much faster on 32-bit x86
add documentation explaining why even a 64K table for srgb_to_uint8 would be inaccurate
disable performance test in test code, back to regression test path
delete some unused functions;
get rid of stbir__inline for some functions that don't need it