diff options
author | reed <reed@chromium.org> | 2015-04-15 18:23:03 -0700 |
---|---|---|
committer | Commit bot <commit-bot@chromium.org> | 2015-04-15 18:23:03 -0700 |
commit | 6983f66d8b3a489133b751e2cef03e72a03bfeae (patch) | |
tree | 1c6b10b05372664f53eb0117ba0d41770ccdc197 /src/core/SkGeometry.h | |
parent | a12225bd32d5172d0d07a7b6c75652f758dbb001 (diff) |
Speeup hairline curves (quads and cubics) (patchset #7 id:120001 of https://codereview.chromium.org/1078413003/)"
ah ha! Check for the define *after* we pull in SkUserConfig.h (indirectly)
This reverts commit 639a82855b94b93c4fa45560e67df8ec4a8bbb3a.
BUG=skia:
TBR=
Review URL: https://codereview.chromium.org/1084283003
Diffstat (limited to 'src/core/SkGeometry.h')
-rw-r--r-- | src/core/SkGeometry.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/core/SkGeometry.h b/src/core/SkGeometry.h index bafde61155..9ddd91f750 100644 --- a/src/core/SkGeometry.h +++ b/src/core/SkGeometry.h @@ -9,6 +9,22 @@ #define SkGeometry_DEFINED #include "SkMatrix.h" +#include "SkNx.h" + +static inline Sk2s from_point(const SkPoint& point) { + return Sk2s::Load(&point.fX); +} + +static inline SkPoint to_point(const Sk2s& x) { + SkPoint point; + x.store(&point.fX); + return point; +} + +static inline Sk2s sk2s_cubic_eval(const Sk2s& A, const Sk2s& B, const Sk2s& C, const Sk2s& D, + const Sk2s& t) { + return ((A * t + B) * t + C) * t + D; +} /** Given a quadratic equation Ax^2 + Bx + C = 0, return 0, 1, 2 roots for the equation. @@ -25,6 +41,16 @@ SkPoint SkEvalQuadTangentAt(const SkPoint src[3], SkScalar t); */ void SkEvalQuadAt(const SkPoint src[3], SkScalar t, SkPoint* pt, SkVector* tangent = NULL); +/** + * output is : eval(t) == coeff[0] * t^2 + coeff[1] * t + coeff[2] + */ +void SkQuadToCoeff(const SkPoint pts[3], SkPoint coeff[3]); + +/** + * output is : eval(t) == coeff[0] * t^3 + coeff[1] * t^2 + coeff[2] * t + coeff[3] + */ +void SkCubicToCoeff(const SkPoint pts[4], SkPoint coeff[4]); + /** Given a src quadratic bezier, chop it at the specified t value, where 0 < t < 1, and return the two new quadratics in dst: dst[0..2] and dst[2..4] |