gfx/2d/ImageScaling.h@97036ab72558 (annotated)
gfx/2d/ImageScaling.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: 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 | #ifndef _MOZILLA_GFX_IMAGESCALING_H |
| michael@0 | 7 | #define _MOZILLA_GFX_IMAGESCALING_H |
| michael@0 | 8 | |
| michael@0 | 9 | #include "Types.h" |
| michael@0 | 10 | |
| michael@0 | 11 | #include <vector> |
| michael@0 | 12 | #include "Point.h" |
| michael@0 | 13 | |
| michael@0 | 14 | namespace mozilla { |
| michael@0 | 15 | namespace gfx { |
| michael@0 | 16 | |
| michael@0 | 17 | class ImageHalfScaler |
| michael@0 | 18 | { |
| michael@0 | 19 | public: |
| michael@0 | 20 | ImageHalfScaler(uint8_t *aData, int32_t aStride, const IntSize &aSize) |
| michael@0 | 21 | : mOrigData(aData), mOrigStride(aStride), mOrigSize(aSize) |
| michael@0 | 22 | , mDataStorage(nullptr) |
| michael@0 | 23 | { |
| michael@0 | 24 | } |
| michael@0 | 25 | |
| michael@0 | 26 | ~ImageHalfScaler() |
| michael@0 | 27 | { |
| michael@0 | 28 | delete [] mDataStorage; |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | void ScaleForSize(const IntSize &aSize); |
| michael@0 | 32 | |
| michael@0 | 33 | uint8_t *GetScaledData() const { return mData; } |
| michael@0 | 34 | IntSize GetSize() const { return mSize; } |
| michael@0 | 35 | uint32_t GetStride() const { return mStride; } |
| michael@0 | 36 | |
| michael@0 | 37 | private: |
| michael@0 | 38 | void HalfImage2D(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 39 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 40 | void HalfImageVertical(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 41 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 42 | void HalfImageHorizontal(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 43 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 44 | |
| michael@0 | 45 | // This is our SSE2 scaling function. Our destination must always be 16-byte |
| michael@0 | 46 | // aligned and use a 16-byte aligned stride. |
| michael@0 | 47 | void HalfImage2D_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 48 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 49 | void HalfImageVertical_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 50 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 51 | void HalfImageHorizontal_SSE2(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 52 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 53 | |
| michael@0 | 54 | void HalfImage2D_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 55 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 56 | void HalfImageVertical_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 57 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 58 | void HalfImageHorizontal_C(uint8_t *aSource, int32_t aSourceStride, const IntSize &aSourceSize, |
| michael@0 | 59 | uint8_t *aDest, uint32_t aDestStride); |
| michael@0 | 60 | |
| michael@0 | 61 | uint8_t *mOrigData; |
| michael@0 | 62 | int32_t mOrigStride; |
| michael@0 | 63 | IntSize mOrigSize; |
| michael@0 | 64 | |
| michael@0 | 65 | uint8_t *mDataStorage; |
| michael@0 | 66 | // Guaranteed 16-byte aligned |
| michael@0 | 67 | uint8_t *mData; |
| michael@0 | 68 | IntSize mSize; |
| michael@0 | 69 | // Guaranteed 16-byte aligned |
| michael@0 | 70 | uint32_t mStride; |
| michael@0 | 71 | }; |
| michael@0 | 72 | |
| michael@0 | 73 | } |
| michael@0 | 74 | } |
| michael@0 | 75 | |
| michael@0 | 76 | #endif |
