gfx/skia/trunk/include/images/SkPageFlipper.h@129ffea94266 (annotated)
gfx/skia/trunk/include/images/SkPageFlipper.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 2008 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 SkPageFlipper_DEFINED |
| michael@0 | 11 | #define SkPageFlipper_DEFINED |
| michael@0 | 12 | |
| michael@0 | 13 | #include "SkRegion.h" |
| michael@0 | 14 | |
| michael@0 | 15 | /** SkPageFlipper manages alternating inval/dirty regions for a rectangular area |
| michael@0 | 16 | (like a bitmap). You call inval() to accumulate inval areas, and then when |
| michael@0 | 17 | you're ready to "flip" pages (i.e. draw into the one you've been |
| michael@0 | 18 | invalidating) you call update, which swaps the inval regions, and returns |
| michael@0 | 19 | two things to you: 1) the final inval region to be drawn into, and 2) the |
| michael@0 | 20 | region of pixels that should be copied from the "front" page onto the one |
| michael@0 | 21 | you're about to draw into. This copyBits region will be disjoint from the |
| michael@0 | 22 | inval region, so both need to be handled. |
| michael@0 | 23 | */ |
| michael@0 | 24 | class SkPageFlipper { |
| michael@0 | 25 | public: |
| michael@0 | 26 | SkPageFlipper(); |
| michael@0 | 27 | SkPageFlipper(int width, int height); |
| michael@0 | 28 | |
| michael@0 | 29 | int width() const { return fWidth; } |
| michael@0 | 30 | int height() const { return fHeight; } |
| michael@0 | 31 | |
| michael@0 | 32 | void resize(int width, int height); |
| michael@0 | 33 | |
| michael@0 | 34 | bool isDirty() const { return !fDirty1->isEmpty(); } |
| michael@0 | 35 | const SkRegion& dirtyRgn() const { return *fDirty1; } |
| michael@0 | 36 | |
| michael@0 | 37 | void inval(); |
| michael@0 | 38 | void inval(const SkIRect&); |
| michael@0 | 39 | void inval(const SkRegion&); |
| michael@0 | 40 | void inval(const SkRect&, bool antialias); |
| michael@0 | 41 | |
| michael@0 | 42 | /** When you're ready to write to the back page, call update. The returned |
| michael@0 | 43 | region is the invalidate are that needs to be drawn to. The copyBits |
| michael@0 | 44 | region (provided by the caller) is the area that should be copied from |
| michael@0 | 45 | the front page to the back page (will not intersect with the returned |
| michael@0 | 46 | inval region. |
| michael@0 | 47 | |
| michael@0 | 48 | Once this is called, the two internal regions are swapped, so the *new* |
| michael@0 | 49 | back inval region is ready to receive new inval calls. |
| michael@0 | 50 | */ |
| michael@0 | 51 | const SkRegion& update(SkRegion* copyBits); |
| michael@0 | 52 | |
| michael@0 | 53 | private: |
| michael@0 | 54 | SkRegion* fDirty0; |
| michael@0 | 55 | SkRegion* fDirty1; |
| michael@0 | 56 | SkRegion fDirty0Storage; |
| michael@0 | 57 | SkRegion fDirty1Storage; |
| michael@0 | 58 | int fWidth; |
| michael@0 | 59 | int fHeight; |
| michael@0 | 60 | }; |
| michael@0 | 61 | |
| michael@0 | 62 | #endif |
