SkFlattenable.cpp revision 227b516f233df5870d79d3f8dcbdaa02336b7356 
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 */
8#include "SkFlattenable.h"
9#include "SkPtrRecorder.h"
10
11SK_DEFINE_INST_COUNT(SkFlattenable)
12
13///////////////////////////////////////////////////////////////////////////////
14
15void SkFlattenable::flatten(SkFlattenableWriteBuffer&) const
16{
17    /*  we don't write anything at the moment, but this allows our subclasses
18        to not know that, since we want them to always call INHERITED::flatten()
19        in their code.
20    */
21}
22
23///////////////////////////////////////////////////////////////////////////////
24
25SkNamedFactorySet::SkNamedFactorySet() : fNextAddedFactory(0) {}
26
27uint32_t SkNamedFactorySet::find(SkFlattenable::Factory factory) {
28    uint32_t index = fFactorySet.find(factory);
29    if (index > 0) {
30        return index;
31    }
32    const char* name = SkFlattenable::FactoryToName(factory);
33    if (NULL == name) {
34        return 0;
35    }
36    *fNames.append() = name;
37    return fFactorySet.add(factory);
38}
39
40const char* SkNamedFactorySet::getNextAddedFactoryName() {
41    if (fNextAddedFactory < fNames.count()) {
42        return fNames[fNextAddedFactory++];
43    }
44    return NULL;
45}
46
47///////////////////////////////////////////////////////////////////////////////
48
49SkRefCntSet::~SkRefCntSet() {
50    // call this now, while our decPtr() is sill in scope
51    this->reset();
52}
53
54void SkRefCntSet::incPtr(void* ptr) {
55    ((SkRefCnt*)ptr)->ref();
56}
57
58void SkRefCntSet::decPtr(void* ptr) {
59    ((SkRefCnt*)ptr)->unref();
60}
61
62///////////////////////////////////////////////////////////////////////////////
63///////////////////////////////////////////////////////////////////////////////
64///////////////////////////////////////////////////////////////////////////////
65
66#define MAX_PAIR_COUNT  1024
67
68struct Pair {
69    const char*             fName;
70    SkFlattenable::Factory  fFactory;
71};
72
73static int gCount;
74static Pair gPairs[MAX_PAIR_COUNT];
75
76void SkFlattenable::Register(const char name[], Factory factory) {
77    SkASSERT(name);
78    SkASSERT(factory);
79
80    static bool gOnce;
81    if (!gOnce) {
82        gCount = 0;
83        gOnce = true;
84    }
85
86    SkASSERT(gCount < MAX_PAIR_COUNT);
87
88    gPairs[gCount].fName = name;
89    gPairs[gCount].fFactory = factory;
90    gCount += 1;
91}
92
93#if !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS && defined(SK_DEBUG)
94static void report_no_entries(const char* functionName) {
95    if (!gCount) {
96        SkDebugf("%s has no registered name/factory pairs."
97                 " Call SkGraphics::Init() at process initialization time.",
98                 functionName);
99    }
100}
101#endif
102
103SkFlattenable::Factory SkFlattenable::NameToFactory(const char name[]) {
104#if !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS && defined(SK_DEBUG)
105    report_no_entries(__FUNCTION__);
106#endif
107    const Pair* pairs = gPairs;
108    for (int i = gCount - 1; i >= 0; --i) {
109        if (strcmp(pairs[i].fName, name) == 0) {
110            return pairs[i].fFactory;
111        }
112    }
113    return NULL;
114}
115
116const char* SkFlattenable::FactoryToName(Factory fact) {
117#if !SK_ALLOW_STATIC_GLOBAL_INITIALIZERS && defined(SK_DEBUG)
118    report_no_entries(__FUNCTION__);
119#endif
120    const Pair* pairs = gPairs;
121    for (int i = gCount - 1; i >= 0; --i) {
122        if (pairs[i].fFactory == fact) {
123            return pairs[i].fName;
124        }
125    }
126    return NULL;
127}
128