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| author | Alexei Podtelezhnikov <apodtele@gmail.com> | 2022-11-23 04:12:08 +0000 |
|---|---|---|
| committer | Alexei Podtelezhnikov <apodtele@gmail.com> | 2022-11-23 04:12:08 +0000 |
| commit | 6e4012550cd8130bd17a92671489097662642948 (patch) | |
| tree | b0604032c061ddabf797b87cabb7ef0b7513d43d /src | |
| parent | aca4ec5907e0bfb5bbeb01370257a121f3f47a0f (diff) | |
| download | freetype2-unclamp.tar.gz | |
* src/base/ftlcdfil.c (FT_SHIFTCLAMP): Cancel clamping.
unclamp
Without clamping, we might get garbage output for unnormalized weights.
So what? Garbage in, garbage out - but filtering becomes noticeably faster.
Diffstat (limited to 'src')
| -rw-r--r-- | src/base/ftlcdfil.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/base/ftlcdfil.c b/src/base/ftlcdfil.c index e72f6d668..f3072f2ca 100644 --- a/src/base/ftlcdfil.c +++ b/src/base/ftlcdfil.c @@ -28,7 +28,12 @@ /* define USE_LEGACY to implement the legacy filter */ #define USE_LEGACY +#if 1 +#define FT_SHIFTCLAMP( x ) (FT_Byte)( x >> 8 ) +#else #define FT_SHIFTCLAMP( x ) ( x >>= 8, (FT_Byte)( x > 255 ? 255 : x ) ) +#endif + /* add padding according to filter weights */ |