gfx/skia/trunk/include/utils/SkInterpolator.h@129ffea94266 (annotated)
gfx/skia/trunk/include/utils/SkInterpolator.h
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2006 The Android Open Source Project |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | #ifndef SkInterpolator_DEFINED |
| michael@0 | 11 | #define SkInterpolator_DEFINED |
| michael@0 | 12 | |
| michael@0 | 13 | #include "SkScalar.h" |
| michael@0 | 14 | |
| michael@0 | 15 | class SkInterpolatorBase : SkNoncopyable { |
| michael@0 | 16 | public: |
| michael@0 | 17 | enum Result { |
| michael@0 | 18 | kNormal_Result, |
| michael@0 | 19 | kFreezeStart_Result, |
| michael@0 | 20 | kFreezeEnd_Result |
| michael@0 | 21 | }; |
| michael@0 | 22 | protected: |
| michael@0 | 23 | SkInterpolatorBase(); |
| michael@0 | 24 | ~SkInterpolatorBase(); |
| michael@0 | 25 | public: |
| michael@0 | 26 | void reset(int elemCount, int frameCount); |
| michael@0 | 27 | |
| michael@0 | 28 | /** Return the start and end time for this interpolator. |
| michael@0 | 29 | If there are no key frames, return false. |
| michael@0 | 30 | @param startTime If not null, returns the time (in milliseconds) of the |
| michael@0 | 31 | first keyframe. If there are no keyframes, this param |
| michael@0 | 32 | is ignored (left unchanged). |
| michael@0 | 33 | @param endTime If not null, returns the time (in milliseconds) of the |
| michael@0 | 34 | last keyframe. If there are no keyframes, this parameter |
| michael@0 | 35 | is ignored (left unchanged). |
| michael@0 | 36 | @return True if there are key frames, or false if there are none. |
| michael@0 | 37 | */ |
| michael@0 | 38 | bool getDuration(SkMSec* startTime, SkMSec* endTime) const; |
| michael@0 | 39 | |
| michael@0 | 40 | |
| michael@0 | 41 | /** Set the whether the repeat is mirrored. |
| michael@0 | 42 | @param mirror If true, the odd repeats interpolate from the last key |
| michael@0 | 43 | frame and the first. |
| michael@0 | 44 | */ |
| michael@0 | 45 | void setMirror(bool mirror) { |
| michael@0 | 46 | fFlags = SkToU8((fFlags & ~kMirror) | (int)mirror); |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | /** Set the repeat count. The repeat count may be fractional. |
| michael@0 | 50 | @param repeatCount Multiplies the total time by this scalar. |
| michael@0 | 51 | */ |
| michael@0 | 52 | void setRepeatCount(SkScalar repeatCount) { fRepeat = repeatCount; } |
| michael@0 | 53 | |
| michael@0 | 54 | /** Set the whether the repeat is mirrored. |
| michael@0 | 55 | @param reset If true, the odd repeats interpolate from the last key |
| michael@0 | 56 | frame and the first. |
| michael@0 | 57 | */ |
| michael@0 | 58 | void setReset(bool reset) { |
| michael@0 | 59 | fFlags = SkToU8((fFlags & ~kReset) | (int)reset); |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | Result timeToT(SkMSec time, SkScalar* T, int* index, SkBool* exact) const; |
| michael@0 | 63 | |
| michael@0 | 64 | protected: |
| michael@0 | 65 | enum Flags { |
| michael@0 | 66 | kMirror = 1, |
| michael@0 | 67 | kReset = 2, |
| michael@0 | 68 | kHasBlend = 4 |
| michael@0 | 69 | }; |
| michael@0 | 70 | static SkScalar ComputeRelativeT(SkMSec time, SkMSec prevTime, |
| michael@0 | 71 | SkMSec nextTime, const SkScalar blend[4] = NULL); |
| michael@0 | 72 | int16_t fFrameCount; |
| michael@0 | 73 | uint8_t fElemCount; |
| michael@0 | 74 | uint8_t fFlags; |
| michael@0 | 75 | SkScalar fRepeat; |
| michael@0 | 76 | struct SkTimeCode { |
| michael@0 | 77 | SkMSec fTime; |
| michael@0 | 78 | SkScalar fBlend[4]; |
| michael@0 | 79 | }; |
| michael@0 | 80 | SkTimeCode* fTimes; // pointer into fStorage |
| michael@0 | 81 | void* fStorage; |
| michael@0 | 82 | #ifdef SK_DEBUG |
| michael@0 | 83 | SkTimeCode(* fTimesArray)[10]; |
| michael@0 | 84 | #endif |
| michael@0 | 85 | }; |
| michael@0 | 86 | |
| michael@0 | 87 | class SkInterpolator : public SkInterpolatorBase { |
| michael@0 | 88 | public: |
| michael@0 | 89 | SkInterpolator(); |
| michael@0 | 90 | SkInterpolator(int elemCount, int frameCount); |
| michael@0 | 91 | void reset(int elemCount, int frameCount); |
| michael@0 | 92 | |
| michael@0 | 93 | /** Add or replace a key frame, copying the values[] data into the |
| michael@0 | 94 | interpolator. |
| michael@0 | 95 | @param index The index of this frame (frames must be ordered by time) |
| michael@0 | 96 | @param time The millisecond time for this frame |
| michael@0 | 97 | @param values The array of values [elemCount] for this frame. The data |
| michael@0 | 98 | is copied into the interpolator. |
| michael@0 | 99 | @param blend A positive scalar specifying how to blend between this |
| michael@0 | 100 | and the next key frame. [0...1) is a cubic lag/log/lag |
| michael@0 | 101 | blend (slow to change at the beginning and end) |
| michael@0 | 102 | 1 is a linear blend (default) |
| michael@0 | 103 | */ |
| michael@0 | 104 | bool setKeyFrame(int index, SkMSec time, const SkScalar values[], |
| michael@0 | 105 | const SkScalar blend[4] = NULL); |
| michael@0 | 106 | |
| michael@0 | 107 | /** Return the computed values given the specified time. Return whether |
| michael@0 | 108 | those values are the result of pinning to either the first |
| michael@0 | 109 | (kFreezeStart) or last (kFreezeEnd), or from interpolated the two |
| michael@0 | 110 | nearest key values (kNormal). |
| michael@0 | 111 | @param time The time to sample (in milliseconds) |
| michael@0 | 112 | @param (may be null) where to write the computed values. |
| michael@0 | 113 | */ |
| michael@0 | 114 | Result timeToValues(SkMSec time, SkScalar values[] = NULL) const; |
| michael@0 | 115 | |
| michael@0 | 116 | SkDEBUGCODE(static void UnitTest();) |
| michael@0 | 117 | private: |
| michael@0 | 118 | SkScalar* fValues; // pointer into fStorage |
| michael@0 | 119 | #ifdef SK_DEBUG |
| michael@0 | 120 | SkScalar(* fScalarsArray)[10]; |
| michael@0 | 121 | #endif |
| michael@0 | 122 | typedef SkInterpolatorBase INHERITED; |
| michael@0 | 123 | }; |
| michael@0 | 124 | |
| michael@0 | 125 | /** Given all the parameters are [0...1], apply the cubic specified by (0,0) |
| michael@0 | 126 | (bx,by) (cx,cy) (1,1) to value, returning the answer, also [0...1]. |
| michael@0 | 127 | */ |
| michael@0 | 128 | SkScalar SkUnitCubicInterp(SkScalar value, SkScalar bx, SkScalar by, |
| michael@0 | 129 | SkScalar cx, SkScalar cy); |
| michael@0 | 130 | |
| michael@0 | 131 | #endif |
