gfx/layers/ImageDataSerializer.h@97036ab72558 (annotated)
gfx/layers/ImageDataSerializer.h
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: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim: sw=2 ts=8 et : |
| michael@0 | 3 | */ |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef GFX_LAYERS_BLOBSURFACE_H |
| michael@0 | 9 | #define GFX_LAYERS_BLOBSURFACE_H |
| michael@0 | 10 | |
| michael@0 | 11 | #include <stdint.h> // for uint8_t, uint32_t |
| michael@0 | 12 | #include "mozilla/Attributes.h" // for MOZ_STACK_CLASS |
| michael@0 | 13 | #include "mozilla/RefPtr.h" // for TemporaryRef |
| michael@0 | 14 | #include "mozilla/gfx/Point.h" // for IntSize |
| michael@0 | 15 | #include "mozilla/gfx/Types.h" // for SurfaceFormat |
| michael@0 | 16 | |
| michael@0 | 17 | class gfxImageSurface; |
| michael@0 | 18 | |
| michael@0 | 19 | namespace mozilla { |
| michael@0 | 20 | namespace gfx { |
| michael@0 | 21 | class DataSourceSurface; |
| michael@0 | 22 | class DrawTarget; |
| michael@0 | 23 | } // namespace gfx |
| michael@0 | 24 | } // namespace mozilla |
| michael@0 | 25 | |
| michael@0 | 26 | namespace mozilla { |
| michael@0 | 27 | namespace layers { |
| michael@0 | 28 | |
| michael@0 | 29 | class ImageDataSerializerBase |
| michael@0 | 30 | { |
| michael@0 | 31 | public: |
| michael@0 | 32 | bool IsValid() const { return mIsValid; } |
| michael@0 | 33 | |
| michael@0 | 34 | uint8_t* GetData(); |
| michael@0 | 35 | uint32_t GetStride() const; |
| michael@0 | 36 | gfx::IntSize GetSize() const; |
| michael@0 | 37 | gfx::SurfaceFormat GetFormat() const; |
| michael@0 | 38 | TemporaryRef<gfx::DataSourceSurface> GetAsSurface(); |
| michael@0 | 39 | TemporaryRef<gfxImageSurface> GetAsThebesSurface(); |
| michael@0 | 40 | TemporaryRef<gfx::DrawTarget> GetAsDrawTarget(gfx::BackendType aBackend); |
| michael@0 | 41 | |
| michael@0 | 42 | static uint32_t ComputeMinBufferSize(gfx::IntSize aSize, |
| michael@0 | 43 | gfx::SurfaceFormat aFormat); |
| michael@0 | 44 | |
| michael@0 | 45 | protected: |
| michael@0 | 46 | |
| michael@0 | 47 | ImageDataSerializerBase(uint8_t* aData, size_t aDataSize) |
| michael@0 | 48 | : mData(aData) |
| michael@0 | 49 | , mDataSize(aDataSize) |
| michael@0 | 50 | , mIsValid(false) |
| michael@0 | 51 | {} |
| michael@0 | 52 | |
| michael@0 | 53 | void Validate(); |
| michael@0 | 54 | |
| michael@0 | 55 | uint8_t* mData; |
| michael@0 | 56 | size_t mDataSize; |
| michael@0 | 57 | bool mIsValid; |
| michael@0 | 58 | }; |
| michael@0 | 59 | |
| michael@0 | 60 | /** |
| michael@0 | 61 | * A facility to serialize an image into a buffer of memory. |
| michael@0 | 62 | * This is intended for use with the IPC code, in order to copy image data |
| michael@0 | 63 | * into shared memory. |
| michael@0 | 64 | * Note that there is a separate serializer class for YCbCr images |
| michael@0 | 65 | * (see YCbCrImageDataSerializer.h). |
| michael@0 | 66 | */ |
| michael@0 | 67 | class MOZ_STACK_CLASS ImageDataSerializer : public ImageDataSerializerBase |
| michael@0 | 68 | { |
| michael@0 | 69 | public: |
| michael@0 | 70 | ImageDataSerializer(uint8_t* aData, size_t aDataSize) |
| michael@0 | 71 | : ImageDataSerializerBase(aData, aDataSize) |
| michael@0 | 72 | { |
| michael@0 | 73 | // a serializer needs to be usable before correct buffer info has been written to it |
| michael@0 | 74 | mIsValid = !!mData; |
| michael@0 | 75 | } |
| michael@0 | 76 | void InitializeBufferInfo(gfx::IntSize aSize, |
| michael@0 | 77 | gfx::SurfaceFormat aFormat); |
| michael@0 | 78 | }; |
| michael@0 | 79 | |
| michael@0 | 80 | /** |
| michael@0 | 81 | * A facility to deserialize image data that has been serialized by an |
| michael@0 | 82 | * ImageDataSerializer. |
| michael@0 | 83 | */ |
| michael@0 | 84 | class MOZ_STACK_CLASS ImageDataDeserializer : public ImageDataSerializerBase |
| michael@0 | 85 | { |
| michael@0 | 86 | public: |
| michael@0 | 87 | ImageDataDeserializer(uint8_t* aData, size_t aDataSize) |
| michael@0 | 88 | : ImageDataSerializerBase(aData, aDataSize) |
| michael@0 | 89 | { |
| michael@0 | 90 | Validate(); |
| michael@0 | 91 | } |
| michael@0 | 92 | |
| michael@0 | 93 | }; |
| michael@0 | 94 | |
| michael@0 | 95 | } // namespace layers |
| michael@0 | 96 | } // namespace mozilla |
| michael@0 | 97 | |
| michael@0 | 98 | #endif |
