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comparison: gfx/skia/trunk/include/utils/SkRTConf.h
gfx/skia/trunk/include/utils/SkRTConf.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:c493f868bafa |
|---|---|
| 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 | |
| 9 #ifndef SkRTConf_DEFINED | |
| 10 #define SkRTConf_DEFINED | |
| 11 | |
| 12 #include "SkString.h" | |
| 13 #include "SkStream.h" | |
| 14 | |
| 15 #include "SkTDict.h" | |
| 16 #include "SkTArray.h" | |
| 17 | |
| 18 /** \class SkRTConfBase | |
| 19 Non-templated base class for the runtime configs | |
| 20 */ | |
| 21 | |
| 22 class SkRTConfBase { | |
| 23 public: | |
| 24 SkRTConfBase(const char *name) : fName(name) {} | |
| 25 virtual ~SkRTConfBase() {} | |
| 26 virtual const char *getName() const { return fName.c_str(); } | |
| 27 virtual bool isDefault() const = 0; | |
| 28 virtual void print(SkWStream *o) const = 0; | |
| 29 virtual bool equals(const SkRTConfBase *conf) const = 0; | |
| 30 protected: | |
| 31 SkString fName; | |
| 32 }; | |
| 33 | |
| 34 /** \class SkRTConf | |
| 35 A class to provide runtime configurability. | |
| 36 */ | |
| 37 template<typename T> class SkRTConf: public SkRTConfBase { | |
| 38 public: | |
| 39 SkRTConf(const char *name, const T &defaultValue, const char *description); | |
| 40 operator const T&() const { return fValue; } | |
| 41 void print(SkWStream *o) const; | |
| 42 bool equals(const SkRTConfBase *conf) const; | |
| 43 bool isDefault() const { return fDefault == fValue; } | |
| 44 void set(const T& value) { fValue = value; } | |
| 45 protected: | |
| 46 void doPrint(char *s) const; | |
| 47 | |
| 48 T fValue; | |
| 49 T fDefault; | |
| 50 SkString fDescription; | |
| 51 }; | |
| 52 | |
| 53 #ifdef SK_DEVELOPER | |
| 54 #define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description) static SkRTConf<confType> varName(confName, defaultValue, description) | |
| 55 #define SK_CONF_SET(confname, value) \ | |
| 56 skRTConfRegistry().set(confname, value, true) | |
| 57 /* SK_CONF_TRY_SET() is like SK_CONF_SET(), but doesn't complain if | |
| 58 confname can't be found. This is useful if the SK_CONF_DECLARE is | |
| 59 inside a source file whose linkage is dependent on the system. */ | |
| 60 #define SK_CONF_TRY_SET(confname, value) \ | |
| 61 skRTConfRegistry().set(confname, value, false) | |
| 62 #else | |
| 63 #define SK_CONF_DECLARE(confType, varName, confName, defaultValue, description) static confType varName = defaultValue | |
| 64 #define SK_CONF_SET(confname, value) (void) confname, (void) value | |
| 65 #define SK_CONF_TRY_SET(confname, value) (void) confname, (void) value | |
| 66 #endif | |
| 67 | |
| 68 /** \class SkRTConfRegistry | |
| 69 A class that maintains a systemwide registry of all runtime configuration | |
| 70 parameters. Mainly used for printing them out and handling multiply-defined | |
| 71 knobs. | |
| 72 */ | |
| 73 | |
| 74 class SkRTConfRegistry { | |
| 75 public: | |
| 76 SkRTConfRegistry(); | |
| 77 ~SkRTConfRegistry(); | |
| 78 void printAll(const char *fname = NULL) const; | |
| 79 bool hasNonDefault() const; | |
| 80 void printNonDefault(const char *fname = NULL) const; | |
| 81 const char *configFileLocation() const; | |
| 82 void possiblyDumpFile() const; | |
| 83 void validate() const; | |
| 84 template <typename T> void set(const char *confname, | |
| 85 T value, | |
| 86 bool warnIfNotFound = true); | |
| 87 #ifdef SK_SUPPORT_UNITTEST | |
| 88 static void UnitTest(); | |
| 89 #endif | |
| 90 private: | |
| 91 template<typename T> friend class SkRTConf; | |
| 92 | |
| 93 void registerConf(SkRTConfBase *conf); | |
| 94 template <typename T> bool parse(const char *name, T* value); | |
| 95 | |
| 96 SkTDArray<SkString *> fConfigFileKeys, fConfigFileValues; | |
| 97 typedef SkTDict< SkTDArray<SkRTConfBase *> * > ConfMap; | |
| 98 ConfMap fConfs; | |
| 99 #ifdef SK_SUPPORT_UNITTEST | |
| 100 SkRTConfRegistry(bool); | |
| 101 #endif | |
| 102 }; | |
| 103 | |
| 104 // our singleton registry | |
| 105 | |
| 106 SkRTConfRegistry &skRTConfRegistry(); | |
| 107 | |
| 108 template<typename T> | |
| 109 SkRTConf<T>::SkRTConf(const char *name, const T &defaultValue, const char *description) | |
| 110 : SkRTConfBase(name) | |
| 111 , fValue(defaultValue) | |
| 112 , fDefault(defaultValue) | |
| 113 , fDescription(description) { | |
| 114 | |
| 115 T value; | |
| 116 if (skRTConfRegistry().parse(fName.c_str(), &value)) { | |
| 117 fValue = value; | |
| 118 } | |
| 119 skRTConfRegistry().registerConf(this); | |
| 120 } | |
| 121 | |
| 122 template<typename T> | |
| 123 void SkRTConf<T>::print(SkWStream *o) const { | |
| 124 char outline[200]; // should be ok because we specify a max. width for everything here. | |
| 125 char *outptr; | |
| 126 if (strlen(getName()) >= 30) { | |
| 127 o->writeText(getName()); | |
| 128 o->writeText(" "); | |
| 129 outptr = &(outline[0]); | |
| 130 } else { | |
| 131 sprintf(outline, "%-30.30s", getName()); | |
| 132 outptr = &(outline[30]); | |
| 133 } | |
| 134 | |
| 135 doPrint(outptr); | |
| 136 sprintf(outptr+30, " %.128s", fDescription.c_str()); | |
| 137 for (size_t i = strlen(outline); i --> 0 && ' ' == outline[i];) { | |
| 138 outline[i] = '\0'; | |
| 139 } | |
| 140 o->writeText(outline); | |
| 141 } | |
| 142 | |
| 143 template<typename T> | |
| 144 void SkRTConf<T>::doPrint(char *s) const { | |
| 145 sprintf(s, "%-30.30s", "How do I print myself??"); | |
| 146 } | |
| 147 | |
| 148 template<> inline void SkRTConf<bool>::doPrint(char *s) const { | |
| 149 char tmp[30]; | |
| 150 sprintf(tmp, "%s # [%s]", fValue ? "true" : "false", fDefault ? "true" : "false"); | |
| 151 sprintf(s, "%-30.30s", tmp); | |
| 152 } | |
| 153 | |
| 154 template<> inline void SkRTConf<int>::doPrint(char *s) const { | |
| 155 char tmp[30]; | |
| 156 sprintf(tmp, "%d # [%d]", fValue, fDefault); | |
| 157 sprintf(s, "%-30.30s", tmp); | |
| 158 } | |
| 159 | |
| 160 template<> inline void SkRTConf<unsigned int>::doPrint(char *s) const { | |
| 161 char tmp[30]; | |
| 162 sprintf(tmp, "%u # [%u]", fValue, fDefault); | |
| 163 sprintf(s, "%-30.30s", tmp); | |
| 164 } | |
| 165 | |
| 166 template<> inline void SkRTConf<float>::doPrint(char *s) const { | |
| 167 char tmp[30]; | |
| 168 sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault); | |
| 169 sprintf(s, "%-30.30s", tmp); | |
| 170 } | |
| 171 | |
| 172 template<> inline void SkRTConf<double>::doPrint(char *s) const { | |
| 173 char tmp[30]; | |
| 174 sprintf(tmp, "%6.6f # [%6.6f]", fValue, fDefault); | |
| 175 sprintf(s, "%-30.30s", tmp); | |
| 176 } | |
| 177 | |
| 178 template<> inline void SkRTConf<const char *>::doPrint(char *s) const { | |
| 179 char tmp[30]; | |
| 180 sprintf(tmp, "%s # [%s]", fValue, fDefault); | |
| 181 sprintf(s, "%-30.30s", tmp); | |
| 182 } | |
| 183 | |
| 184 template<typename T> | |
| 185 bool SkRTConf<T>::equals(const SkRTConfBase *conf) const { | |
| 186 // static_cast here is okay because there's only one kind of child class. | |
| 187 const SkRTConf<T> *child_pointer = static_cast<const SkRTConf<T> *>(conf); | |
| 188 return child_pointer && | |
| 189 fName == child_pointer->fName && | |
| 190 fDescription == child_pointer->fDescription && | |
| 191 fValue == child_pointer->fValue && | |
| 192 fDefault == child_pointer->fDefault; | |
| 193 } | |
| 194 | |
| 195 #endif |
