image/src/FrameSequence.cpp@ac0c01689b40 (annotated)
image/src/FrameSequence.cpp
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
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: 2; 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 "FrameSequence.h" |
| michael@0 | 7 | |
| michael@0 | 8 | using namespace mozilla; |
| michael@0 | 9 | using namespace mozilla::image; |
| michael@0 | 10 | |
| michael@0 | 11 | namespace mozilla { |
| michael@0 | 12 | namespace image { |
| michael@0 | 13 | |
| michael@0 | 14 | FrameSequence::~FrameSequence() |
| michael@0 | 15 | { |
| michael@0 | 16 | ClearFrames(); |
| michael@0 | 17 | } |
| michael@0 | 18 | |
| michael@0 | 19 | const FrameDataPair& |
| michael@0 | 20 | FrameSequence::GetFrame(uint32_t framenum) const |
| michael@0 | 21 | { |
| michael@0 | 22 | if (framenum >= mFrames.Length()) { |
| michael@0 | 23 | static FrameDataPair empty; |
| michael@0 | 24 | return empty; |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | return mFrames[framenum]; |
| michael@0 | 28 | } |
| michael@0 | 29 | |
| michael@0 | 30 | uint32_t |
| michael@0 | 31 | FrameSequence::GetNumFrames() const |
| michael@0 | 32 | { |
| michael@0 | 33 | return mFrames.Length(); |
| michael@0 | 34 | } |
| michael@0 | 35 | |
| michael@0 | 36 | void |
| michael@0 | 37 | FrameSequence::RemoveFrame(uint32_t framenum) |
| michael@0 | 38 | { |
| michael@0 | 39 | NS_ABORT_IF_FALSE(framenum < mFrames.Length(), "Deleting invalid frame!"); |
| michael@0 | 40 | |
| michael@0 | 41 | mFrames.RemoveElementAt(framenum); |
| michael@0 | 42 | } |
| michael@0 | 43 | |
| michael@0 | 44 | void |
| michael@0 | 45 | FrameSequence::ClearFrames() |
| michael@0 | 46 | { |
| michael@0 | 47 | // Since FrameDataPair holds an nsAutoPtr to its frame, clearing the mFrames |
| michael@0 | 48 | // array also deletes all the frames. |
| michael@0 | 49 | mFrames.Clear(); |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | void |
| michael@0 | 53 | FrameSequence::InsertFrame(uint32_t framenum, imgFrame* aFrame) |
| michael@0 | 54 | { |
| michael@0 | 55 | NS_ABORT_IF_FALSE(framenum <= mFrames.Length(), "Inserting invalid frame!"); |
| michael@0 | 56 | mFrames.InsertElementAt(framenum, aFrame); |
| michael@0 | 57 | if (GetNumFrames() > 1) { |
| michael@0 | 58 | // If we're creating our second element, we now know we're animated. |
| michael@0 | 59 | // Therefore, we need to lock the first frame too. |
| michael@0 | 60 | if (GetNumFrames() == 2) { |
| michael@0 | 61 | mFrames[0].LockAndGetData(); |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | // Whenever we have more than one frame, we always lock *all* our frames |
| michael@0 | 65 | // so we have all the image data pointers. |
| michael@0 | 66 | mFrames[framenum].LockAndGetData(); |
| michael@0 | 67 | } |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | imgFrame* |
| michael@0 | 71 | FrameSequence::SwapFrame(uint32_t framenum, imgFrame* aFrame) |
| michael@0 | 72 | { |
| michael@0 | 73 | NS_ABORT_IF_FALSE(framenum < mFrames.Length(), "Swapping invalid frame!"); |
| michael@0 | 74 | |
| michael@0 | 75 | FrameDataPair ret; |
| michael@0 | 76 | |
| michael@0 | 77 | // Steal the imgFrame. |
| michael@0 | 78 | if (framenum < mFrames.Length()) { |
| michael@0 | 79 | ret = mFrames[framenum]; |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | if (aFrame) { |
| michael@0 | 83 | mFrames.ReplaceElementAt(framenum, aFrame); |
| michael@0 | 84 | } else { |
| michael@0 | 85 | mFrames.RemoveElementAt(framenum); |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | return ret.Forget(); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | size_t |
| michael@0 | 92 | FrameSequence::SizeOfDecodedWithComputedFallbackIfHeap(gfxMemoryLocation aLocation, |
| michael@0 | 93 | MallocSizeOf aMallocSizeOf) const |
| michael@0 | 94 | { |
| michael@0 | 95 | size_t n = 0; |
| michael@0 | 96 | for (uint32_t i = 0; i < mFrames.Length(); ++i) { |
| michael@0 | 97 | imgFrame* frame = mFrames.SafeElementAt(i, FrameDataPair()); |
| michael@0 | 98 | NS_ABORT_IF_FALSE(frame, "Null frame in frame array!"); |
| michael@0 | 99 | n += frame->SizeOfExcludingThisWithComputedFallbackIfHeap(aLocation, aMallocSizeOf); |
| michael@0 | 100 | } |
| michael@0 | 101 | |
| michael@0 | 102 | return n; |
| michael@0 | 103 | } |
| michael@0 | 104 | |
| michael@0 | 105 | } // namespace image |
| michael@0 | 106 | } // namespace mozilla |
