The Tor Browser / file comparison
comparison: content/canvas/src/ImageData.cpp
content/canvas/src/ImageData.cpp
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:d771314e02f9 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 et tw=78: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 5 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "mozilla/dom/ImageData.h" | |
| 8 | |
| 9 #include "mozilla/CheckedInt.h" | |
| 10 #include "mozilla/HoldDropJSObjects.h" | |
| 11 #include "mozilla/dom/ImageDataBinding.h" | |
| 12 | |
| 13 #include "jsapi.h" | |
| 14 | |
| 15 namespace mozilla { | |
| 16 namespace dom { | |
| 17 | |
| 18 NS_IMPL_CYCLE_COLLECTING_ADDREF(ImageData) | |
| 19 NS_IMPL_CYCLE_COLLECTING_RELEASE(ImageData) | |
| 20 | |
| 21 NS_IMPL_CYCLE_COLLECTION_CLASS(ImageData) | |
| 22 | |
| 23 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ImageData) | |
| 24 NS_INTERFACE_MAP_ENTRY(nsISupports) | |
| 25 NS_INTERFACE_MAP_END | |
| 26 | |
| 27 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(ImageData) | |
| 28 NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mData) | |
| 29 NS_IMPL_CYCLE_COLLECTION_TRACE_END | |
| 30 | |
| 31 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(ImageData) | |
| 32 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS | |
| 33 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END | |
| 34 | |
| 35 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(ImageData) | |
| 36 tmp->DropData(); | |
| 37 NS_IMPL_CYCLE_COLLECTION_UNLINK_END | |
| 38 | |
| 39 //static | |
| 40 ImageData* | |
| 41 ImageData::Constructor(const GlobalObject& aGlobal, | |
| 42 const uint32_t aWidth, | |
| 43 const uint32_t aHeight, | |
| 44 ErrorResult& aRv) | |
| 45 { | |
| 46 if (aWidth == 0 || aHeight == 0) { | |
| 47 aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); | |
| 48 return nullptr; | |
| 49 } | |
| 50 CheckedInt<uint32_t> length = CheckedInt<uint32_t>(aWidth) * aHeight * 4; | |
| 51 if (!length.isValid()) { | |
| 52 aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); | |
| 53 return nullptr; | |
| 54 } | |
| 55 js::AssertSameCompartment(aGlobal.GetContext(), aGlobal.Get()); | |
| 56 JSObject* data = Uint8ClampedArray::Create(aGlobal.GetContext(), | |
| 57 length.value()); | |
| 58 if (!data) { | |
| 59 aRv.Throw(NS_ERROR_OUT_OF_MEMORY); | |
| 60 return nullptr; | |
| 61 } | |
| 62 return new ImageData(aWidth, aHeight, *data); | |
| 63 } | |
| 64 | |
| 65 //static | |
| 66 ImageData* | |
| 67 ImageData::Constructor(const GlobalObject& aGlobal, | |
| 68 const Uint8ClampedArray& aData, | |
| 69 const uint32_t aWidth, | |
| 70 const Optional<uint32_t>& aHeight, | |
| 71 ErrorResult& aRv) | |
| 72 { | |
| 73 aData.ComputeLengthAndData(); | |
| 74 | |
| 75 uint32_t length = aData.Length(); | |
| 76 if (length == 0 || length % 4) { | |
| 77 aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR); | |
| 78 return nullptr; | |
| 79 } | |
| 80 length /= 4; | |
| 81 if (aWidth == 0) { | |
| 82 aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); | |
| 83 return nullptr; | |
| 84 } | |
| 85 uint32_t height = length / aWidth; | |
| 86 if (length != aWidth * height || | |
| 87 (aHeight.WasPassed() && aHeight.Value() != height)) { | |
| 88 aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR); | |
| 89 return nullptr; | |
| 90 } | |
| 91 return new ImageData(aWidth, height, *aData.Obj()); | |
| 92 } | |
| 93 | |
| 94 void | |
| 95 ImageData::HoldData() | |
| 96 { | |
| 97 mozilla::HoldJSObjects(this); | |
| 98 } | |
| 99 | |
| 100 void | |
| 101 ImageData::DropData() | |
| 102 { | |
| 103 if (mData) { | |
| 104 mData = nullptr; | |
| 105 mozilla::DropJSObjects(this); | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 JSObject* | |
| 110 ImageData::WrapObject(JSContext* cx) | |
| 111 { | |
| 112 return ImageDataBinding::Wrap(cx, this); | |
| 113 } | |
| 114 | |
| 115 } // namespace dom | |
| 116 } // namespace mozilla |
