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Side by Side Diff: src/lazy/SkCachingPixelRef.cpp

Issue 1364743002: remove unused SkCachingPixelRef (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 5 years, 2 months ago
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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 "SkCachingPixelRef.h"
9 #include "SkBitmapCache.h"
10 #include "SkRect.h"
11
12 bool SkCachingPixelRef::Install(SkImageGenerator* generator,
13 SkBitmap* dst) {
14 SkASSERT(dst != nullptr);
15 if (nullptr == generator) {
16 return false;
17 }
18 const SkImageInfo info = generator->getInfo();
19 if (!dst->setInfo(info)) {
20 delete generator;
21 return false;
22 }
23 SkAutoTUnref<SkCachingPixelRef> ref(new SkCachingPixelRef(info, generator, d st->rowBytes()));
24 dst->setPixelRef(ref);
25 return true;
26 }
27
28 SkCachingPixelRef::SkCachingPixelRef(const SkImageInfo& info,
29 SkImageGenerator* generator,
30 size_t rowBytes)
31 : INHERITED(info)
32 , fImageGenerator(generator)
33 , fErrorInDecoding(false)
34 , fRowBytes(rowBytes) {
35 SkASSERT(fImageGenerator != nullptr);
36 }
37 SkCachingPixelRef::~SkCachingPixelRef() {
38 delete fImageGenerator;
39 // Assert always unlock before unref.
40 }
41
42 bool SkCachingPixelRef::onNewLockPixels(LockRec* rec) {
43 if (fErrorInDecoding) {
44 return false; // don't try again.
45 }
46
47 const SkImageInfo& info = this->info();
48 if (!SkBitmapCache::Find(
49 this->getGenerationID(), info.bounds(), &fLockedBitmap)) {
50 // Cache has been purged, must re-decode.
51 if (!fLockedBitmap.tryAllocPixels(info, fRowBytes)) {
52 fErrorInDecoding = true;
53 return false;
54 }
55 if (!fImageGenerator->getPixels(info, fLockedBitmap.getPixels(), fRowByt es)) {
56 fErrorInDecoding = true;
57 return false;
58 }
59 fLockedBitmap.setImmutable();
60 SkBitmapCache::Add(this, info.bounds(), fLockedBitmap);
61 }
62
63 // Now bitmap should contain a concrete PixelRef of the decoded image.
64 void* pixels = fLockedBitmap.getPixels();
65 SkASSERT(pixels != nullptr);
66 rec->fPixels = pixels;
67 rec->fColorTable = nullptr;
68 rec->fRowBytes = fLockedBitmap.rowBytes();
69 return true;
70 }
71
72 void SkCachingPixelRef::onUnlockPixels() {
73 fLockedBitmap.reset();
74 }
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