1/*
2 * Copyright 2015 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 "SkBitmapCache.h"
9#include "SkResourceCache.h"
10#include "SkYUVPlanesCache.h"
11
12#define CHECK_LOCAL(localCache, localName, globalName, ...) \
13    ((localCache) ? localCache->localName(__VA_ARGS__) : SkResourceCache::globalName(__VA_ARGS__))
14
15namespace {
16static unsigned gYUVPlanesKeyNamespaceLabel;
17
18struct YUVValue {
19    SkYUVPlanesCache::Info fInfo;
20    SkCachedData*          fData;
21};
22
23struct YUVPlanesKey : public SkResourceCache::Key {
24    YUVPlanesKey(uint32_t genID)
25        : fGenID(genID)
26    {
27        this->init(&gYUVPlanesKeyNamespaceLabel, SkMakeResourceCacheSharedIDForBitmap(genID),
28                   sizeof(genID));
29    }
30
31    uint32_t fGenID;
32};
33
34struct YUVPlanesRec : public SkResourceCache::Rec {
35    YUVPlanesRec(YUVPlanesKey key, SkCachedData* data, SkYUVPlanesCache::Info* info)
36        : fKey(key)
37    {
38        fValue.fData = data;
39        fValue.fInfo = *info;
40        fValue.fData->attachToCacheAndRef();
41    }
42    ~YUVPlanesRec() {
43        fValue.fData->detachFromCacheAndUnref();
44    }
45
46    YUVPlanesKey  fKey;
47    YUVValue      fValue;
48
49    const Key& getKey() const override { return fKey; }
50    size_t bytesUsed() const override { return sizeof(*this) + fValue.fData->size(); }
51    const char* getCategory() const override { return "yuv-planes"; }
52    SkDiscardableMemory* diagnostic_only_getDiscardable() const override {
53        return fValue.fData->diagnostic_only_getDiscardable();
54    }
55
56    static bool Visitor(const SkResourceCache::Rec& baseRec, void* contextData) {
57        const YUVPlanesRec& rec = static_cast<const YUVPlanesRec&>(baseRec);
58        YUVValue* result = static_cast<YUVValue*>(contextData);
59
60        SkCachedData* tmpData = rec.fValue.fData;
61        tmpData->ref();
62        if (nullptr == tmpData->data()) {
63            tmpData->unref();
64            return false;
65        }
66        result->fData = tmpData;
67        result->fInfo = rec.fValue.fInfo;
68        return true;
69    }
70};
71} // namespace
72
73SkCachedData* SkYUVPlanesCache::FindAndRef(uint32_t genID, Info* info,
74                                           SkResourceCache* localCache) {
75    YUVValue result;
76    YUVPlanesKey key(genID);
77    if (!CHECK_LOCAL(localCache, find, Find, key, YUVPlanesRec::Visitor, &result)) {
78        return nullptr;
79    }
80
81    *info = result.fInfo;
82    return result.fData;
83}
84
85void SkYUVPlanesCache::Add(uint32_t genID, SkCachedData* data, Info* info,
86                           SkResourceCache* localCache) {
87    YUVPlanesKey key(genID);
88    return CHECK_LOCAL(localCache, add, Add, new YUVPlanesRec(key, data, info));
89}
90