epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2008 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 4 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 9 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 10 | #include "SkPageFlipper.h" |
| 11 | |
| 12 | SkPageFlipper::SkPageFlipper() { |
| 13 | fWidth = 0; |
| 14 | fHeight = 0; |
| 15 | fDirty0 = &fDirty0Storage; |
| 16 | fDirty1 = &fDirty1Storage; |
| 17 | |
| 18 | fDirty0->setEmpty(); |
| 19 | fDirty1->setEmpty(); |
| 20 | } |
| 21 | |
| 22 | SkPageFlipper::SkPageFlipper(int width, int height) { |
| 23 | fWidth = width; |
| 24 | fHeight = height; |
| 25 | fDirty0 = &fDirty0Storage; |
| 26 | fDirty1 = &fDirty1Storage; |
| 27 | |
| 28 | fDirty0->setRect(0, 0, width, height); |
| 29 | fDirty1->setEmpty(); |
| 30 | } |
| 31 | |
| 32 | void SkPageFlipper::resize(int width, int height) { |
| 33 | fWidth = width; |
| 34 | fHeight = height; |
| 35 | |
| 36 | // this is the opposite of the constructors |
| 37 | fDirty1->setRect(0, 0, width, height); |
| 38 | fDirty0->setEmpty(); |
| 39 | } |
| 40 | |
| 41 | void SkPageFlipper::inval() { |
| 42 | fDirty1->setRect(0, 0, fWidth, fHeight); |
| 43 | } |
| 44 | |
| 45 | void SkPageFlipper::inval(const SkIRect& rect) { |
| 46 | SkIRect r; |
| 47 | r.set(0, 0, fWidth, fHeight); |
| 48 | if (r.intersect(rect)) { |
| 49 | fDirty1->op(r, SkRegion::kUnion_Op); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | void SkPageFlipper::inval(const SkRegion& rgn) { |
| 54 | SkRegion r; |
| 55 | r.setRect(0, 0, fWidth, fHeight); |
| 56 | if (r.op(rgn, SkRegion::kIntersect_Op)) { |
| 57 | fDirty1->op(r, SkRegion::kUnion_Op); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | void SkPageFlipper::inval(const SkRect& rect, bool antialias) { |
| 62 | SkIRect r; |
| 63 | rect.round(&r); |
| 64 | if (antialias) { |
| 65 | r.inset(-1, -1); |
| 66 | } |
| 67 | this->inval(r); |
| 68 | } |
| 69 | |
| 70 | const SkRegion& SkPageFlipper::update(SkRegion* copyBits) { |
| 71 | // Copy over anything new from page0 that isn't dirty in page1 |
| 72 | copyBits->op(*fDirty0, *fDirty1, SkRegion::kDifference_Op); |
| 73 | SkTSwap<SkRegion*>(fDirty0, fDirty1); |
| 74 | fDirty1->setEmpty(); |
| 75 | return *fDirty0; |
| 76 | } |
| 77 | |
| 78 | |