reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 2 | * Copyright 2006 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 3 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #ifndef SkDashPathEffect_DEFINED |
| 9 | #define SkDashPathEffect_DEFINED |
| 10 | |
| 11 | #include "SkPathEffect.h" |
| 12 | |
| 13 | /** \class SkDashPathEffect |
| 14 | |
| 15 | SkDashPathEffect is a subclass of SkPathEffect that implements dashing |
| 16 | */ |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 17 | class SK_API SkDashPathEffect : public SkPathEffect { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 18 | public: |
epoger@google.com | 20bf4ca | 2012-04-27 13:34:52 +0000 | [diff] [blame] | 19 | /** intervals: array containing an even number of entries (>=2), with |
| 20 | the even indices specifying the length of "on" intervals, and the odd |
| 21 | indices specifying the length of "off" intervals. |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 22 | count: number of elements in the intervals array |
epoger@google.com | 20bf4ca | 2012-04-27 13:34:52 +0000 | [diff] [blame] | 23 | phase: offset into the intervals array (mod the sum of all of the |
| 24 | intervals). |
| 25 | |
| 26 | For example: if intervals[] = {10, 20}, count = 2, and phase = 25, |
| 27 | this will set up a dashed path like so: |
| 28 | 5 pixels off |
| 29 | 10 pixels on |
| 30 | 20 pixels off |
| 31 | 10 pixels on |
| 32 | 20 pixels off |
| 33 | ... |
| 34 | A phase of -5, 25, 55, 85, etc. would all result in the same path, |
| 35 | because the sum of all the intervals is 30. |
| 36 | |
| 37 | Note: only affects stroked paths. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | */ |
commit-bot@chromium.org | 0a2bf90 | 2014-02-20 20:40:19 +0000 | [diff] [blame] | 39 | static SkDashPathEffect* Create(const SkScalar intervals[], int count, |
commit-bot@chromium.org | 35c03fb | 2014-03-31 18:52:51 +0000 | [diff] [blame] | 40 | SkScalar phase) { |
| 41 | return SkNEW_ARGS(SkDashPathEffect, (intervals, count, phase)); |
commit-bot@chromium.org | 0a2bf90 | 2014-02-20 20:40:19 +0000 | [diff] [blame] | 42 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 43 | virtual ~SkDashPathEffect(); |
| 44 | |
reed@google.com | 548a1f3 | 2012-12-18 16:12:09 +0000 | [diff] [blame] | 45 | virtual bool filterPath(SkPath* dst, const SkPath& src, |
reed@google.com | 4bbdeac | 2013-01-24 21:03:11 +0000 | [diff] [blame] | 46 | SkStrokeRec*, const SkRect*) const SK_OVERRIDE; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 47 | |
skia.committer@gmail.com | 687c57c | 2012-11-29 02:01:19 +0000 | [diff] [blame] | 48 | virtual bool asPoints(PointData* results, const SkPath& src, |
reed@google.com | 4bbdeac | 2013-01-24 21:03:11 +0000 | [diff] [blame] | 49 | const SkStrokeRec&, const SkMatrix&, |
| 50 | const SkRect*) const SK_OVERRIDE; |
robertphillips@google.com | 629ab54 | 2012-11-28 17:18:11 +0000 | [diff] [blame] | 51 | |
commit-bot@chromium.org | aec1438 | 2014-04-22 15:21:18 +0000 | [diff] [blame] | 52 | virtual DashType asADash(DashInfo* info) const SK_OVERRIDE; |
| 53 | |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 54 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDashPathEffect) |
reed@google.com | 6bac947 | 2011-06-21 19:24:00 +0000 | [diff] [blame] | 55 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 56 | protected: |
commit-bot@chromium.org | 35c03fb | 2014-03-31 18:52:51 +0000 | [diff] [blame] | 57 | SkDashPathEffect(const SkScalar intervals[], int count, SkScalar phase); |
commit-bot@chromium.org | bd0be25 | 2014-05-15 15:40:41 +0000 | [diff] [blame] | 58 | virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
commit-bot@chromium.org | 0a2bf90 | 2014-02-20 20:40:19 +0000 | [diff] [blame] | 59 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 60 | private: |
| 61 | SkScalar* fIntervals; |
| 62 | int32_t fCount; |
commit-bot@chromium.org | aec1438 | 2014-04-22 15:21:18 +0000 | [diff] [blame] | 63 | SkScalar fPhase; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 64 | // computed from phase |
| 65 | SkScalar fInitialDashLength; |
| 66 | int32_t fInitialDashIndex; |
| 67 | SkScalar fIntervalLength; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 68 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 69 | typedef SkPathEffect INHERITED; |
| 70 | }; |
| 71 | |
| 72 | #endif |