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comparison: widget/android/AndroidDirectTexture.cpp
widget/android/AndroidDirectTexture.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:c5b3c71f5a65 |
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| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include <unistd.h> | |
| 7 #include <errno.h> | |
| 8 #include "AndroidDirectTexture.h" | |
| 9 #include "nsRect.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 | |
| 13 AndroidDirectTexture::AndroidDirectTexture(uint32_t width, uint32_t height, uint32_t usage, | |
| 14 gfxImageFormat format) : | |
| 15 mLock("AndroidDirectTexture.mLock") | |
| 16 , mNeedFlip(false) | |
| 17 , mWidth(width) | |
| 18 , mHeight(height) | |
| 19 , mFormat(format) | |
| 20 , mPendingReallocBuffer(nullptr) | |
| 21 { | |
| 22 mFrontBuffer = new AndroidGraphicBuffer(width, height, usage, format); | |
| 23 mBackBuffer = new AndroidGraphicBuffer(width, height, usage, format); | |
| 24 } | |
| 25 | |
| 26 AndroidDirectTexture::~AndroidDirectTexture() | |
| 27 { | |
| 28 if (mFrontBuffer) { | |
| 29 delete mFrontBuffer; | |
| 30 mFrontBuffer = nullptr; | |
| 31 } | |
| 32 | |
| 33 if (mBackBuffer) { | |
| 34 delete mBackBuffer; | |
| 35 mBackBuffer = nullptr; | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 void | |
| 40 AndroidDirectTexture::ReallocPendingBuffer() | |
| 41 { | |
| 42 // We may have reallocated while the current back buffer was being | |
| 43 // used as the front buffer. If we have such a reallocation pending | |
| 44 // and the current back buffer is the target buffer, do it now. | |
| 45 // | |
| 46 // It is assumed that mLock is already acquired | |
| 47 if (mPendingReallocBuffer == mBackBuffer) { | |
| 48 mBackBuffer->Reallocate(mWidth, mHeight, mFormat); | |
| 49 mPendingReallocBuffer = nullptr; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 bool | |
| 54 AndroidDirectTexture::Lock(uint32_t aUsage, unsigned char **bits) | |
| 55 { | |
| 56 nsIntRect rect(0, 0, mWidth, mHeight); | |
| 57 return Lock(aUsage, rect, bits); | |
| 58 } | |
| 59 | |
| 60 bool | |
| 61 AndroidDirectTexture::Lock(uint32_t aUsage, const nsIntRect& aRect, unsigned char **bits) | |
| 62 { | |
| 63 mLock.Lock(); | |
| 64 ReallocPendingBuffer(); | |
| 65 | |
| 66 int result; | |
| 67 while ((result = mBackBuffer->Lock(aUsage, aRect, bits)) == -EBUSY) { | |
| 68 usleep(1000); // 1ms | |
| 69 } | |
| 70 | |
| 71 return result == 0; | |
| 72 } | |
| 73 | |
| 74 bool | |
| 75 AndroidDirectTexture::Unlock(bool aFlip) | |
| 76 { | |
| 77 if (aFlip) { | |
| 78 mNeedFlip = true; | |
| 79 } | |
| 80 | |
| 81 bool result = mBackBuffer->Unlock(); | |
| 82 mLock.Unlock(); | |
| 83 | |
| 84 return result; | |
| 85 } | |
| 86 | |
| 87 bool | |
| 88 AndroidDirectTexture::Reallocate(uint32_t aWidth, uint32_t aHeight) { | |
| 89 return Reallocate(aWidth, aHeight, mFormat); | |
| 90 } | |
| 91 | |
| 92 bool | |
| 93 AndroidDirectTexture::Reallocate(uint32_t aWidth, uint32_t aHeight, gfxImageFormat aFormat) | |
| 94 { | |
| 95 MutexAutoLock lock(mLock); | |
| 96 | |
| 97 // We only reallocate the current back buffer. The front buffer is likely | |
| 98 // in use, so we'll reallocate it on the first Lock() after it is rotated | |
| 99 // to the back. | |
| 100 bool result = mBackBuffer->Reallocate(aWidth, aHeight, aFormat); | |
| 101 if (result) { | |
| 102 mPendingReallocBuffer = mFrontBuffer; | |
| 103 | |
| 104 mWidth = aWidth; | |
| 105 mHeight = aHeight; | |
| 106 } | |
| 107 | |
| 108 return result; | |
| 109 } | |
| 110 | |
| 111 bool | |
| 112 AndroidDirectTexture::Bind() | |
| 113 { | |
| 114 MutexAutoLock lock(mLock); | |
| 115 | |
| 116 if (mNeedFlip) { | |
| 117 AndroidGraphicBuffer* tmp = mBackBuffer; | |
| 118 mBackBuffer = mFrontBuffer; | |
| 119 mFrontBuffer = tmp; | |
| 120 mNeedFlip = false; | |
| 121 } | |
| 122 | |
| 123 return mFrontBuffer->Bind(); | |
| 124 } | |
| 125 | |
| 126 } /* mozilla */ |
