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| 1 /* |
| 2 * Copyright 2013 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #include "SkDiscardablePixelRef.h" |
| 9 #include "SkDiscardableMemory.h" |
| 10 |
| 11 SkDiscardablePixelRef::SkDiscardablePixelRef(SkImageGenerator* generator, |
| 12 const SkImageInfo& info, |
| 13 size_t size, |
| 14 size_t rowBytes) |
| 15 : fGenerator(generator) |
| 16 , fInfo(info) |
| 17 , fSize(size) |
| 18 , fRowBytes(rowBytes) |
| 19 , fDiscardableMemory(NULL) { |
| 20 SkASSERT(fGenerator != NULL); |
| 21 SkASSERT(fSize > 0); |
| 22 SkASSERT(fRowBytes > 0); |
| 23 } |
| 24 |
| 25 SkDiscardablePixelRef::~SkDiscardablePixelRef() { |
| 26 SkDELETE(fGenerator); |
| 27 } |
| 28 |
| 29 void* SkDiscardablePixelRef::onLockPixels(SkColorTable**) { |
| 30 if (fDiscardableMemory != NULL) { |
| 31 if (fDiscardableMemory->lock()) { |
| 32 return fDiscardableMemory->data(); |
| 33 } |
| 34 fDiscardableMemory = NULL; |
| 35 } |
| 36 fDiscardableMemory = SkDiscardableMemory::Create(fSize); |
| 37 if (NULL == fDiscardableMemory) { |
| 38 return NULL; // Memory allocation failed. |
| 39 } |
| 40 void* pixels = fDiscardableMemory->data(); |
| 41 if (!fGenerator->getPixels(fInfo, pixels, fRowBytes)) { |
| 42 return NULL; // TODO(halcanary) Find out correct thing to do. |
| 43 } |
| 44 return pixels; |
| 45 } |
| 46 void SkDiscardablePixelRef::onUnlockPixels() { |
| 47 if (fDiscardableMemory != NULL) { |
| 48 fDiscardableMemory->unlock(); |
| 49 } |
| 50 } |
| 51 |
| 52 bool SkDiscardablePixelRef::Install(SkImageGenerator* generator, |
| 53 SkBitmap* dst) { |
| 54 SkImageInfo info; |
| 55 SkASSERT(generator != NULL); |
| 56 if ((NULL == generator) |
| 57 || (!generator->getInfo(&info)) |
| 58 || (!dst->setConfig(info, 0))) { |
| 59 SkDELETE(generator); |
| 60 return false; |
| 61 } |
| 62 SkAutoTUnref<SkDiscardablePixelRef> ref(SkNEW_ARGS(SkDiscardablePixelRef, |
| 63 (generator, info, |
| 64 dst->getSize(), |
| 65 dst->rowBytes()))); |
| 66 dst->setPixelRef(ref); |
| 67 return true; |
| 68 } |
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