epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | #include "SkPixelRef.h" |
| 9 | #include "SkFlattenable.h" |
| 10 | #include "SkThread.h" |
| 11 | |
digit@google.com | 1771cbf | 2012-01-26 21:26:40 +0000 | [diff] [blame] | 12 | SK_DECLARE_STATIC_MUTEX(gPixelRefMutex); |
bsalomon@google.com | 586f48c | 2011-04-14 15:07:22 +0000 | [diff] [blame] | 13 | |
reed@google.com | 9c49bc3 | 2011-07-07 13:42:37 +0000 | [diff] [blame] | 14 | extern int32_t SkNextPixelRefGenerationID(); |
| 15 | int32_t SkNextPixelRefGenerationID() { |
bsalomon@google.com | 586f48c | 2011-04-14 15:07:22 +0000 | [diff] [blame] | 16 | static int32_t gPixelRefGenerationID; |
| 17 | // do a loop in case our global wraps around, as we never want to |
| 18 | // return a 0 |
| 19 | int32_t genID; |
| 20 | do { |
| 21 | genID = sk_atomic_inc(&gPixelRefGenerationID) + 1; |
| 22 | } while (0 == genID); |
| 23 | return genID; |
| 24 | } |
| 25 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | |
digit@google.com | 1771cbf | 2012-01-26 21:26:40 +0000 | [diff] [blame] | 27 | SkPixelRef::SkPixelRef(SkBaseMutex* mutex) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 28 | if (NULL == mutex) { |
| 29 | mutex = &gPixelRefMutex; |
| 30 | } |
| 31 | fMutex = mutex; |
| 32 | fPixels = NULL; |
| 33 | fColorTable = NULL; // we do not track ownership of this |
| 34 | fLockCount = 0; |
| 35 | fGenerationID = 0; // signal to rebuild |
| 36 | fIsImmutable = false; |
| 37 | } |
| 38 | |
djsollen@google.com | 5370cd9 | 2012-03-28 20:47:01 +0000 | [diff] [blame] | 39 | SkPixelRef::SkPixelRef(SkFlattenableReadBuffer& buffer, SkBaseMutex* mutex) |
| 40 | : INHERITED(buffer) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 41 | if (NULL == mutex) { |
| 42 | mutex = &gPixelRefMutex; |
| 43 | } |
| 44 | fMutex = mutex; |
| 45 | fPixels = NULL; |
| 46 | fColorTable = NULL; // we do not track ownership of this |
| 47 | fLockCount = 0; |
| 48 | fGenerationID = 0; // signal to rebuild |
| 49 | fIsImmutable = buffer.readBool(); |
| 50 | } |
| 51 | |
djsollen@google.com | 5370cd9 | 2012-03-28 20:47:01 +0000 | [diff] [blame] | 52 | void SkPixelRef::flatten(SkFlattenableWriteBuffer& buffer) { |
| 53 | this->INHERITED::flatten(buffer); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 54 | buffer.writeBool(fIsImmutable); |
| 55 | } |
| 56 | |
| 57 | void SkPixelRef::lockPixels() { |
| 58 | SkAutoMutexAcquire ac(*fMutex); |
reed@google.com | 93c5f9e | 2011-02-24 18:09:46 +0000 | [diff] [blame] | 59 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 60 | if (1 == ++fLockCount) { |
| 61 | fPixels = this->onLockPixels(&fColorTable); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | void SkPixelRef::unlockPixels() { |
| 66 | SkAutoMutexAcquire ac(*fMutex); |
reed@google.com | 93c5f9e | 2011-02-24 18:09:46 +0000 | [diff] [blame] | 67 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 68 | SkASSERT(fLockCount > 0); |
| 69 | if (0 == --fLockCount) { |
| 70 | this->onUnlockPixels(); |
| 71 | fPixels = NULL; |
| 72 | fColorTable = NULL; |
| 73 | } |
| 74 | } |
| 75 | |
reed@google.com | 9c49bc3 | 2011-07-07 13:42:37 +0000 | [diff] [blame] | 76 | bool SkPixelRef::lockPixelsAreWritable() const { |
| 77 | return this->onLockPixelsAreWritable(); |
| 78 | } |
| 79 | |
| 80 | bool SkPixelRef::onLockPixelsAreWritable() const { |
| 81 | return true; |
| 82 | } |
| 83 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 84 | uint32_t SkPixelRef::getGenerationID() const { |
bsalomon@google.com | 586f48c | 2011-04-14 15:07:22 +0000 | [diff] [blame] | 85 | if (0 == fGenerationID) { |
| 86 | fGenerationID = SkNextPixelRefGenerationID(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 87 | } |
bsalomon@google.com | 586f48c | 2011-04-14 15:07:22 +0000 | [diff] [blame] | 88 | return fGenerationID; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | void SkPixelRef::notifyPixelsChanged() { |
reed@android.com | 3eab80c | 2009-03-24 18:47:35 +0000 | [diff] [blame] | 92 | #ifdef SK_DEBUG |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 93 | if (fIsImmutable) { |
| 94 | SkDebugf("========== notifyPixelsChanged called on immutable pixelref"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | } |
reed@android.com | 3eab80c | 2009-03-24 18:47:35 +0000 | [diff] [blame] | 96 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 97 | // this signals us to recompute this next time around |
| 98 | fGenerationID = 0; |
| 99 | } |
| 100 | |
| 101 | void SkPixelRef::setImmutable() { |
| 102 | fIsImmutable = true; |
| 103 | } |
| 104 | |
reed@google.com | 50dfa01 | 2011-04-01 19:05:36 +0000 | [diff] [blame] | 105 | bool SkPixelRef::readPixels(SkBitmap* dst, const SkIRect* subset) { |
| 106 | return this->onReadPixels(dst, subset); |
| 107 | } |
| 108 | |
| 109 | bool SkPixelRef::onReadPixels(SkBitmap* dst, const SkIRect* subset) { |
| 110 | return false; |
| 111 | } |
| 112 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 113 | /////////////////////////////////////////////////////////////////////////////// |
| 114 | |
djsollen@google.com | 56c6977 | 2011-11-08 19:00:26 +0000 | [diff] [blame] | 115 | #ifdef SK_BUILD_FOR_ANDROID |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 116 | void SkPixelRef::globalRef(void* data) { |
| 117 | this->ref(); |
| 118 | } |
| 119 | |
| 120 | void SkPixelRef::globalUnref() { |
| 121 | this->unref(); |
| 122 | } |
reed@google.com | 93c5f9e | 2011-02-24 18:09:46 +0000 | [diff] [blame] | 123 | #endif |