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| author | B Stack <bgstack15@gmail.com> | 2019-03-12 16:09:20 -0400 |
|---|---|---|
| committer | B Stack <bgstack15@gmail.com> | 2019-03-12 16:09:20 -0400 |
| commit | 27177c9cbc47d4114ccee56015fb0407e7e258cc (patch) | |
| tree | dc226d83311470a23cdf0c02064feb525fcc5096 /xBRZ/src/xbrz_tools.h | |
| parent | Merge branch '10.9' into 'master' (diff) | |
| download | FreeFileSync-27177c9cbc47d4114ccee56015fb0407e7e258cc.tar.gz FreeFileSync-27177c9cbc47d4114ccee56015fb0407e7e258cc.tar.bz2 FreeFileSync-27177c9cbc47d4114ccee56015fb0407e7e258cc.zip | |
10.10
Diffstat (limited to 'xBRZ/src/xbrz_tools.h')
| -rw-r--r-- | xBRZ/src/xbrz_tools.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/xBRZ/src/xbrz_tools.h b/xBRZ/src/xbrz_tools.h index aaa2b769..15bea025 100644 --- a/xBRZ/src/xbrz_tools.h +++ b/xBRZ/src/xbrz_tools.h @@ -184,7 +184,7 @@ void bilinearScale(const uint32_t* src, int srcWidth, int srcHeight, int srcPitc //perf notes: // -> double-based calculation is (slightly) faster than float - // -> precalculation gives significant boost; std::vector<> memory allocation is negligible! + // -> pre-calculation gives significant boost; std::vector<> memory allocation is negligible! struct CoeffsX { int x1 = 0; @@ -233,11 +233,9 @@ void bilinearScale(const uint32_t* src, int srcWidth, int srcHeight, int srcPitc auto interpolate = [=](int offset) { - /* - https://en.wikipedia.org/wiki/Bilinear_interpolation - (c11(x2 - x) + c21(x - x1)) * (y2 - y ) + - (c12(x2 - x) + c22(x - x1)) * (y - y1) - */ + /* https://en.wikipedia.org/wiki/Bilinear_interpolation + (c11(x2 - x) + c21(x - x1)) * (y2 - y ) + + (c12(x2 - x) + c22(x - x1)) * (y - y1) */ const auto c11 = (srcLine [x1] >> (8 * offset)) & 0xff; const auto c21 = (srcLine [x2] >> (8 * offset)) & 0xff; const auto c12 = (srcLineNext[x1] >> (8 * offset)) & 0xff; |