| |
| /* |
| * Copyright 2010 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| |
| #ifndef SkFlingState_DEFINED |
| #define SkFlingState_DEFINED |
| |
| #include "SkScalar.h" |
| #include "SkPoint.h" |
| |
| class SkMatrix; |
| |
| struct FlingState { |
| FlingState() : fActive(false) {} |
| |
| bool isActive() const { return fActive; } |
| void stop() { fActive = false; } |
| |
| void reset(float sx, float sy); |
| bool evaluateMatrix(SkMatrix* matrix); |
| |
| private: |
| SkPoint fDirection; |
| SkScalar fSpeed0; |
| double fTime0; |
| bool fActive; |
| }; |
| |
| class GrAnimateFloat { |
| public: |
| GrAnimateFloat(); |
| |
| void start(float v0, float v1, float duration); |
| bool isActive() const { return fTime0 != 0; } |
| void stop() { fTime0 = 0; } |
| |
| float evaluate(); |
| |
| private: |
| float fValue0, fValue1, fDuration; |
| SkMSec fTime0; |
| }; |
| |
| #endif |
| |