gfx/skia/trunk/src/core/SkDrawLooper.cpp@97036ab72558 (annotated)
gfx/skia/trunk/src/core/SkDrawLooper.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2013 Google Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | * found in the LICENSE file. |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "SkDrawLooper.h" |
| michael@0 | 9 | #include "SkCanvas.h" |
| michael@0 | 10 | #include "SkMatrix.h" |
| michael@0 | 11 | #include "SkPaint.h" |
| michael@0 | 12 | #include "SkRect.h" |
| michael@0 | 13 | #include "SkSmallAllocator.h" |
| michael@0 | 14 | |
| michael@0 | 15 | bool SkDrawLooper::canComputeFastBounds(const SkPaint& paint) const { |
| michael@0 | 16 | SkCanvas canvas; |
| michael@0 | 17 | SkSmallAllocator<1, 32> allocator; |
| michael@0 | 18 | void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize()); |
| michael@0 | 19 | |
| michael@0 | 20 | SkDrawLooper::Context* context = this->createContext(&canvas, buffer); |
| michael@0 | 21 | for (;;) { |
| michael@0 | 22 | SkPaint p(paint); |
| michael@0 | 23 | if (context->next(&canvas, &p)) { |
| michael@0 | 24 | p.setLooper(NULL); |
| michael@0 | 25 | if (!p.canComputeFastBounds()) { |
| michael@0 | 26 | return false; |
| michael@0 | 27 | } |
| michael@0 | 28 | } else { |
| michael@0 | 29 | break; |
| michael@0 | 30 | } |
| michael@0 | 31 | } |
| michael@0 | 32 | return true; |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& src, |
| michael@0 | 36 | SkRect* dst) const { |
| michael@0 | 37 | SkCanvas canvas; |
| michael@0 | 38 | SkSmallAllocator<1, 32> allocator; |
| michael@0 | 39 | void* buffer = allocator.reserveT<SkDrawLooper::Context>(this->contextSize()); |
| michael@0 | 40 | |
| michael@0 | 41 | *dst = src; // catch case where there are no loops |
| michael@0 | 42 | SkDrawLooper::Context* context = this->createContext(&canvas, buffer); |
| michael@0 | 43 | for (bool firstTime = true;; firstTime = false) { |
| michael@0 | 44 | SkPaint p(paint); |
| michael@0 | 45 | if (context->next(&canvas, &p)) { |
| michael@0 | 46 | SkRect r(src); |
| michael@0 | 47 | |
| michael@0 | 48 | p.setLooper(NULL); |
| michael@0 | 49 | p.computeFastBounds(r, &r); |
| michael@0 | 50 | canvas.getTotalMatrix().mapRect(&r); |
| michael@0 | 51 | |
| michael@0 | 52 | if (firstTime) { |
| michael@0 | 53 | *dst = r; |
| michael@0 | 54 | } else { |
| michael@0 | 55 | dst->join(r); |
| michael@0 | 56 | } |
| michael@0 | 57 | } else { |
| michael@0 | 58 | break; |
| michael@0 | 59 | } |
| michael@0 | 60 | } |
| michael@0 | 61 | } |
