gfx/2d/SourceSurfaceRawData.cpp@97036ab72558 (annotated)
gfx/2d/SourceSurfaceRawData.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 | /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "SourceSurfaceRawData.h" |
| michael@0 | 7 | |
| michael@0 | 8 | #include "DataSurfaceHelpers.h" |
| michael@0 | 9 | #include "Logging.h" |
| michael@0 | 10 | #include "mozilla/Types.h" // for decltype |
| michael@0 | 11 | |
| michael@0 | 12 | namespace mozilla { |
| michael@0 | 13 | namespace gfx { |
| michael@0 | 14 | |
| michael@0 | 15 | bool |
| michael@0 | 16 | SourceSurfaceRawData::InitWrappingData(uint8_t *aData, |
| michael@0 | 17 | const IntSize &aSize, |
| michael@0 | 18 | int32_t aStride, |
| michael@0 | 19 | SurfaceFormat aFormat, |
| michael@0 | 20 | bool aOwnData) |
| michael@0 | 21 | { |
| michael@0 | 22 | mRawData = aData; |
| michael@0 | 23 | mSize = aSize; |
| michael@0 | 24 | mStride = aStride; |
| michael@0 | 25 | mFormat = aFormat; |
| michael@0 | 26 | mOwnData = aOwnData; |
| michael@0 | 27 | |
| michael@0 | 28 | return true; |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | bool |
| michael@0 | 32 | SourceSurfaceAlignedRawData::Init(const IntSize &aSize, |
| michael@0 | 33 | SurfaceFormat aFormat) |
| michael@0 | 34 | { |
| michael@0 | 35 | mFormat = aFormat; |
| michael@0 | 36 | mStride = GetAlignedStride<16>(aSize.width * BytesPerPixel(aFormat)); |
| michael@0 | 37 | |
| michael@0 | 38 | size_t bufLen = BufferSizeFromStrideAndHeight(mStride, aSize.height); |
| michael@0 | 39 | if (bufLen > 0) { |
| michael@0 | 40 | static_assert(sizeof(decltype(mArray[0])) == 1, |
| michael@0 | 41 | "mArray.Realloc() takes an object count, so its objects must be 1-byte sized if we use bufLen"); |
| michael@0 | 42 | mArray.Realloc(/* actually an object count */ bufLen); |
| michael@0 | 43 | mSize = aSize; |
| michael@0 | 44 | } else { |
| michael@0 | 45 | mArray.Dealloc(); |
| michael@0 | 46 | mSize.SizeTo(0, 0); |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | return mArray != nullptr; |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | bool |
| michael@0 | 53 | SourceSurfaceAlignedRawData::InitWithStride(const IntSize &aSize, |
| michael@0 | 54 | SurfaceFormat aFormat, |
| michael@0 | 55 | int32_t aStride) |
| michael@0 | 56 | { |
| michael@0 | 57 | mFormat = aFormat; |
| michael@0 | 58 | mStride = aStride; |
| michael@0 | 59 | |
| michael@0 | 60 | size_t bufLen = BufferSizeFromStrideAndHeight(mStride, aSize.height); |
| michael@0 | 61 | if (bufLen > 0) { |
| michael@0 | 62 | static_assert(sizeof(decltype(mArray[0])) == 1, |
| michael@0 | 63 | "mArray.Realloc() takes an object count, so its objects must be 1-byte sized if we use bufLen"); |
| michael@0 | 64 | mArray.Realloc(/* actually an object count */ bufLen); |
| michael@0 | 65 | mSize = aSize; |
| michael@0 | 66 | } else { |
| michael@0 | 67 | mArray.Dealloc(); |
| michael@0 | 68 | mSize.SizeTo(0, 0); |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | return mArray != nullptr; |
| michael@0 | 72 | } |
| michael@0 | 73 | |
| michael@0 | 74 | } |
| michael@0 | 75 | } |
