886cf53447
1) rename to bilerp_xy, for x,y in {n[egative], p[ositive};
2) pull out a save_xy stage to save off the original x,y;
3) also calculate the fractional x,y fx,fy once instead of 4 times.
1) is a pure refactor;
2) adds a stage but otherwise is nothing different;
3) changes images a little bit (fractional parts can vary a bit around powers of two).
This extends naturally to naive bicubic using 16 bicubic_xy stages.
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD
Change-Id: I666de5c21e978abb4feb6e3225e5b5920ba6c5b9
Reviewed-on: https://skia-review.googlesource.com/5550
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>
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Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See full details, and build instructions, at https://skia.org.