1/*
2 * Copyright 2011 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 "SkFlattenable.h"
9#include "SkPtrRecorder.h"
10#include "SkReadBuffer.h"
11
12///////////////////////////////////////////////////////////////////////////////
13
14#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
15bool SkFlattenable::NeedsDeepUnflatten(const SkReadBuffer& buffer) {
16    return buffer.isVersionLT(SkReadBuffer::kFlattenCreateProc_Version);
17}
18#endif
19
20///////////////////////////////////////////////////////////////////////////////
21
22SkNamedFactorySet::SkNamedFactorySet() : fNextAddedFactory(0) {}
23
24uint32_t SkNamedFactorySet::find(SkFlattenable::Factory factory) {
25    uint32_t index = fFactorySet.find(factory);
26    if (index > 0) {
27        return index;
28    }
29    const char* name = SkFlattenable::FactoryToName(factory);
30    if (NULL == name) {
31        return 0;
32    }
33    *fNames.append() = name;
34    return fFactorySet.add(factory);
35}
36
37const char* SkNamedFactorySet::getNextAddedFactoryName() {
38    if (fNextAddedFactory < fNames.count()) {
39        return fNames[fNextAddedFactory++];
40    }
41    return NULL;
42}
43
44///////////////////////////////////////////////////////////////////////////////
45
46SkRefCntSet::~SkRefCntSet() {
47    // call this now, while our decPtr() is sill in scope
48    this->reset();
49}
50
51void SkRefCntSet::incPtr(void* ptr) {
52    ((SkRefCnt*)ptr)->ref();
53}
54
55void SkRefCntSet::decPtr(void* ptr) {
56    ((SkRefCnt*)ptr)->unref();
57}
58
59///////////////////////////////////////////////////////////////////////////////
60///////////////////////////////////////////////////////////////////////////////
61///////////////////////////////////////////////////////////////////////////////
62
63#define MAX_ENTRY_COUNT  1024
64
65struct Entry {
66    const char*             fName;
67    SkFlattenable::Factory  fFactory;
68    SkFlattenable::Type     fType;
69};
70
71static int gCount;
72static Entry gEntries[MAX_ENTRY_COUNT];
73
74void SkFlattenable::Register(const char name[], Factory factory, SkFlattenable::Type type) {
75    SkASSERT(name);
76    SkASSERT(factory);
77
78    static bool gOnce = false;
79    if (!gOnce) {
80        gCount = 0;
81        gOnce = true;
82    }
83
84    SkASSERT(gCount < MAX_ENTRY_COUNT);
85
86    gEntries[gCount].fName = name;
87    gEntries[gCount].fFactory = factory;
88    gEntries[gCount].fType = type;
89    gCount += 1;
90}
91
92#ifdef SK_DEBUG
93static void report_no_entries(const char* functionName) {
94    if (!gCount) {
95        SkDebugf("%s has no registered name/factory/type entries."
96                 " Call SkFlattenable::InitializeFlattenablesIfNeeded() before using gEntries",
97                 functionName);
98    }
99}
100#endif
101
102SkFlattenable::Factory SkFlattenable::NameToFactory(const char name[]) {
103    InitializeFlattenablesIfNeeded();
104#ifdef SK_DEBUG
105    report_no_entries(__FUNCTION__);
106#endif
107    const Entry* entries = gEntries;
108    for (int i = gCount - 1; i >= 0; --i) {
109        if (strcmp(entries[i].fName, name) == 0) {
110            return entries[i].fFactory;
111        }
112    }
113    return NULL;
114}
115
116bool SkFlattenable::NameToType(const char name[], SkFlattenable::Type* type) {
117    SkASSERT(type);
118    InitializeFlattenablesIfNeeded();
119#ifdef SK_DEBUG
120    report_no_entries(__FUNCTION__);
121#endif
122    const Entry* entries = gEntries;
123    for (int i = gCount - 1; i >= 0; --i) {
124        if (strcmp(entries[i].fName, name) == 0) {
125            *type = entries[i].fType;
126            return true;
127        }
128    }
129    return false;
130}
131
132const char* SkFlattenable::FactoryToName(Factory fact) {
133    InitializeFlattenablesIfNeeded();
134#ifdef SK_DEBUG
135    report_no_entries(__FUNCTION__);
136#endif
137    const Entry* entries = gEntries;
138    for (int i = gCount - 1; i >= 0; --i) {
139        if (entries[i].fFactory == fact) {
140            return entries[i].fName;
141        }
142    }
143    return NULL;
144}
145