diff options
| author |  keyar@chromium.org <keyar@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-23 20:53:25 +0000 |
|---|---|---|
| committer | keyar@chromium.org <keyar@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-08-23 20:53:25 +0000 |
| commit | f4959ab11827bef99e8985031feb457cae1f987a (patch) | |
| tree | 17fca024b8acab7acd438eecd6e5f080eea67e64 /include | |
| parent | ac4b86cdcf30c59958edd95f6d2d106350bb7d0f (diff) | |
Implemented power of two tiling.
Review URL: https://codereview.appspot.com/6485056
git-svn-id: http://skia.googlecode.com/svn/trunk@5274 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'include')
| -rw-r--r-- | include/core/SkScalar.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/core/SkScalar.h b/include/core/SkScalar.h index ed419689d8..4c3bdb277f 100644 --- a/include/core/SkScalar.h +++ b/include/core/SkScalar.h @@ -336,6 +336,12 @@ static inline SkScalar SkScalarInterp(SkScalar A, SkScalar B, SkScalar t) { return A + SkScalarMul(B - A, t); } +static inline SkScalar SkScalarLog2(SkScalar x) { + static const SkScalar log2_conversion_factor = SkScalarDiv(1, SkScalarLog(2)); + + return SkScalarMul(SkScalarLog(x), log2_conversion_factor); +} + /** Interpolate along the function described by (keys[length], values[length]) for the passed searchKey. SearchKeys outside the range keys[0]-keys[Length] clamp to the min or max value. This function was inspired by a desire |