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Diffstat (limited to 'gfx/2d/BezierUtils.h')
| -rw-r--r-- | gfx/2d/BezierUtils.h | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/gfx/2d/BezierUtils.h b/gfx/2d/BezierUtils.h deleted file mode 100644 index 7871f0284..000000000 --- a/gfx/2d/BezierUtils.h +++ /dev/null @@ -1,185 +0,0 @@ -/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/* This Source Code Form is subject to the terms of the Mozilla Public - * License, v. 2.0. If a copy of the MPL was not distributed with this - * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ - -#ifndef mozilla_BezierUtils_h_ -#define mozilla_BezierUtils_h_ - -#include "mozilla/gfx/2D.h" -#include "gfxRect.h" - -namespace mozilla { -namespace gfx { - -// Control points for bezier curve -// -// mPoints[2] -// +-----___---+ mPoints[3] -// __-- -// _-- -// / -// / -// mPoints[1] + | -// | | -// || -// || -// | -// | -// | -// | -// mPoints[0] + -struct Bezier { - Point mPoints[4]; -}; - -// Calculate a point or it's differential of a bezier curve formed by -// aBezier and parameter t. -// -// GetBezierPoint = P(t) -// GetBezierDifferential = P'(t) -// GetBezierDifferential2 = P''(t) -// -// mPoints[2] -// +-----___---+ mPoints[3] -// __-- P(1) -// _-- -// + -// / P(t) -// mPoints[1] + | -// | | -// || -// || -// | -// | -// | -// | -// mPoints[0] + P(0) -Point GetBezierPoint(const Bezier& aBezier, Float t); -Point GetBezierDifferential(const Bezier& aBezier, Float t); -Point GetBezierDifferential2(const Bezier& aBezier, Float t); - -// Calculate length of a simple bezier curve formed by aBezier and range [a, b]. -Float GetBezierLength(const Bezier& aBezier, Float a, Float b); - -// Split bezier curve formed by aBezier into [0,t1], [t1,t2], [t2,1] parts, and -// stores control points for [t1,t2] to aSubBezier. -// -// ___---+ -// __+- P(1) -// _-- P(t2) -// - -// / <-- aSubBezier -// | -// | -// + -// | P(t1) -// | -// | -// | -// | -// + P(0) -void GetSubBezier(Bezier* aSubBezier, const Bezier& aBezier, - Float t1, Float t2); - -// Find a nearest point on bezier curve formed by aBezier to a point aTarget. -// aInitialT is a hint to find the parameter t for the nearest point. -// If aT is non-null, parameter for the nearest point is stored to *aT. -// This function expects a bezier curve to be an approximation of elliptic arc. -// Otherwise it will return wrong point. -// -// aTarget -// + ___---+ -// __-- -// _-- -// + -// / nearest point = P(t = *aT) -// | -// | -// | -// + P(aInitialT) -// | -// | -// | -// | -// + -Point FindBezierNearestPoint(const Bezier& aBezier, const Point& aTarget, - Float aInitialT, Float* aT=nullptr); - -// Calculate control points for a bezier curve that is an approximation of -// an elliptic arc. -// -// aCornerSize.width -// |<----------------->| -// | | -// aCornerPoint| mPoints[2] | -// -------------+-------+-----___---+ mPoints[3] -// ^ | __-- -// | | _-- -// | | - -// | | / -// aCornerSize.height | mPoints[1] + | -// | | | -// | || -// | || -// | | -// | | -// | | -// v mPoints[0] | -// -------------+ -void GetBezierPointsForCorner(Bezier* aBezier, mozilla::css::Corner aCorner, - const Point& aCornerPoint, - const Size& aCornerSize); - -// Calculate the approximate length of a quarter elliptic arc formed by radii -// (a, b). -// -// a -// |<----------------->| -// | | -// ---+-------------___---+ -// ^ | __-- -// | | _-- -// | | - -// | | / -// b | | | -// | | | -// | || -// | || -// | | -// | | -// | | -// v | -// ---+ -Float GetQuarterEllipticArcLength(Float a, Float b); - -// Calculate the distance between an elliptic arc formed by (origin, width, -// height), and a point P, along a line formed by |P + n * normal|. -// P should be outside of the ellipse, and the line should cross with the -// ellipse twice at n > 0 points. -// -// width -// |<----------------->| -// origin | | -// -----------+-------------___---+ -// ^ normal | __-- -// | P +->__ | _-- -// | --__ - -// | | --+ -// height | | | -// | | | -// | || -// | || -// | | -// | | -// | | -// v | -// -----------+ -Float CalculateDistanceToEllipticArc(const Point& P, const Point& normal, - const Point& origin, - Float width, Float height); - -} // namespace gfx -} // namespace mozilla - -#endif /* mozilla_BezierUtils_h_ */ |